add ydb deps

144 files changed, 55270 insertions, 0 deletions

diff --git a/contrib/python/pytest/py2/.dist-info/METADATA b/contrib/python/pytest/py2/.dist-info/METADATA
new file mode 100644
index 0000000000..251bfce1ee
--- /dev/null
+++ b/contrib/python/pytest/py2/.dist-info/METADATA
@@ -0,0 +1,195 @@
+Metadata-Version: 2.1
+Name: pytest
+Version: 4.6.11
+Summary: pytest: simple powerful testing with Python
+Home-page: https://docs.pytest.org/en/latest/
+Author: Holger Krekel, Bruno Oliveira, Ronny Pfannschmidt, Floris Bruynooghe, Brianna Laugher, Florian Bruhin and others
+License: MIT license
+Project-URL: Source, https://github.com/pytest-dev/pytest
+Project-URL: Tracker, https://github.com/pytest-dev/pytest/issues
+Keywords: test,unittest
+Platform: unix
+Platform: linux
+Platform: osx
+Platform: cygwin
+Platform: win32
+Classifier: Development Status :: 6 - Mature
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: MIT License
+Classifier: Operating System :: POSIX
+Classifier: Operating System :: Microsoft :: Windows
+Classifier: Operating System :: MacOS :: MacOS X
+Classifier: Topic :: Software Development :: Testing
+Classifier: Topic :: Software Development :: Libraries
+Classifier: Topic :: Utilities
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 2.7
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.4
+Classifier: Programming Language :: Python :: 3.5
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Programming Language :: Python :: 3.8
+Classifier: Programming Language :: Python :: 3.9
+Requires-Python: !=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7
+Requires-Dist: py (>=1.5.0)
+Requires-Dist: six (>=1.10.0)
+Requires-Dist: packaging
+Requires-Dist: attrs (>=17.4.0)
+Requires-Dist: atomicwrites (>=1.0)
+Requires-Dist: pluggy (<1.0,>=0.12)
+Requires-Dist: wcwidth
+Requires-Dist: funcsigs (>=1.0) ; python_version < "3.0"
+Requires-Dist: pathlib2 (>=2.2.0) ; python_version < "3.6"
+Requires-Dist: importlib-metadata (>=0.12) ; python_version < "3.8"
+Requires-Dist: more-itertools (<6.0.0,>=4.0.0) ; python_version <= "2.7"
+Requires-Dist: more-itertools (>=4.0.0) ; python_version > "2.7"
+Requires-Dist: colorama ; sys_platform == "win32" and python_version != "3.4"
+Requires-Dist: colorama (<=0.4.1) ; sys_platform == "win32" and python_version == "3.4"
+Provides-Extra: testing
+Requires-Dist: argcomplete ; extra == 'testing'
+Requires-Dist: hypothesis (>=3.56) ; extra == 'testing'
+Requires-Dist: nose ; extra == 'testing'
+Requires-Dist: requests ; extra == 'testing'
+Requires-Dist: mock ; (python_version == "2.7") and extra == 'testing'
+
+.. image:: https://docs.pytest.org/en/latest/_static/pytest1.png
+   :target: https://docs.pytest.org/en/latest/
+   :align: center
+   :alt: pytest
+
+
+------
+
+.. image:: https://img.shields.io/pypi/v/pytest.svg
+    :target: https://pypi.org/project/pytest/
+
+.. image:: https://img.shields.io/conda/vn/conda-forge/pytest.svg
+    :target: https://anaconda.org/conda-forge/pytest
+
+.. image:: https://img.shields.io/pypi/pyversions/pytest.svg
+    :target: https://pypi.org/project/pytest/
+
+.. image:: https://codecov.io/gh/pytest-dev/pytest/branch/master/graph/badge.svg
+    :target: https://codecov.io/gh/pytest-dev/pytest
+    :alt: Code coverage Status
+
+.. image:: https://travis-ci.org/pytest-dev/pytest.svg?branch=master
+    :target: https://travis-ci.org/pytest-dev/pytest
+
+.. image:: https://dev.azure.com/pytest-dev/pytest/_apis/build/status/pytest-CI?branchName=master
+    :target: https://dev.azure.com/pytest-dev/pytest
+
+.. image:: https://img.shields.io/badge/code%20style-black-000000.svg
+    :target: https://github.com/python/black
+
+.. image:: https://www.codetriage.com/pytest-dev/pytest/badges/users.svg
+    :target: https://www.codetriage.com/pytest-dev/pytest
+
+The ``pytest`` framework makes it easy to write small tests, yet
+scales to support complex functional testing for applications and libraries.
+
+An example of a simple test:
+
+.. code-block:: python
+
+    # content of test_sample.py
+    def inc(x):
+        return x + 1
+
+
+    def test_answer():
+        assert inc(3) == 5
+
+
+To execute it::
+
+    $ pytest
+    ============================= test session starts =============================
+    collected 1 items
+
+    test_sample.py F
+
+    ================================== FAILURES ===================================
+    _________________________________ test_answer _________________________________
+
+        def test_answer():
+    >       assert inc(3) == 5
+    E       assert 4 == 5
+    E        +  where 4 = inc(3)
+
+    test_sample.py:5: AssertionError
+    ========================== 1 failed in 0.04 seconds ===========================
+
+
+Due to ``pytest``'s detailed assertion introspection, only plain ``assert`` statements are used. See `getting-started <https://docs.pytest.org/en/latest/getting-started.html#our-first-test-run>`_ for more examples.
+
+
+Features
+--------
+
+- Detailed info on failing `assert statements <https://docs.pytest.org/en/latest/assert.html>`_ (no need to remember ``self.assert*`` names);
+
+- `Auto-discovery
+  <https://docs.pytest.org/en/latest/goodpractices.html#python-test-discovery>`_
+  of test modules and functions;
+
+- `Modular fixtures <https://docs.pytest.org/en/latest/fixture.html>`_ for
+  managing small or parametrized long-lived test resources;
+
+- Can run `unittest <https://docs.pytest.org/en/latest/unittest.html>`_ (or trial),
+  `nose <https://docs.pytest.org/en/latest/nose.html>`_ test suites out of the box;
+
+- Python 2.7, Python 3.4+, PyPy 2.3, Jython 2.5 (untested);
+
+- Rich plugin architecture, with over 315+ `external plugins <http://plugincompat.herokuapp.com>`_ and thriving community;
+
+
+Documentation
+-------------
+
+For full documentation, including installation, tutorials and PDF documents, please see https://docs.pytest.org/en/latest/.
+
+
+Bugs/Requests
+-------------
+
+Please use the `GitHub issue tracker <https://github.com/pytest-dev/pytest/issues>`_ to submit bugs or request features.
+
+
+Changelog
+---------
+
+Consult the `Changelog <https://docs.pytest.org/en/latest/changelog.html>`__ page for fixes and enhancements of each version.
+
+
+Support pytest
+--------------
+
+You can support pytest by obtaining a `Tideflift subscription`_.
+
+Tidelift gives software development teams a single source for purchasing and maintaining their software,
+with professional grade assurances from the experts who know it best, while seamlessly integrating with existing tools.
+
+
+.. _`Tideflift subscription`: https://tidelift.com/subscription/pkg/pypi-pytest?utm_source=pypi-pytest&utm_medium=referral&utm_campaign=readme
+
+
+Security
+^^^^^^^^
+
+pytest has never been associated with a security vunerability, but in any case, to report a
+security vulnerability please use the `Tidelift security contact <https://tidelift.com/security>`_.
+Tidelift will coordinate the fix and disclosure.
+
+
+License
+-------
+
+Copyright Holger Krekel and others, 2004-2020.
+
+Distributed under the terms of the `MIT`_ license, pytest is free and open source software.
+
+.. _`MIT`: https://github.com/pytest-dev/pytest/blob/master/LICENSE
+
+
diff --git a/contrib/python/pytest/py2/.dist-info/entry_points.txt b/contrib/python/pytest/py2/.dist-info/entry_points.txt
new file mode 100644
index 0000000000..d8e4fd298f
--- /dev/null
+++ b/contrib/python/pytest/py2/.dist-info/entry_points.txt
@@ -0,0 +1,4 @@
+[console_scripts]
+py.test = pytest:main
+pytest = pytest:main
+
diff --git a/contrib/python/pytest/py2/.dist-info/top_level.txt b/contrib/python/pytest/py2/.dist-info/top_level.txt
new file mode 100644
index 0000000000..e94857af96
--- /dev/null
+++ b/contrib/python/pytest/py2/.dist-info/top_level.txt
@@ -0,0 +1,2 @@
+_pytest
+pytest
diff --git a/contrib/python/pytest/py2/AUTHORS b/contrib/python/pytest/py2/AUTHORS
new file mode 100644
index 0000000000..80fce53929
--- /dev/null
+++ b/contrib/python/pytest/py2/AUTHORS
@@ -0,0 +1,263 @@
+Holger Krekel, holger at merlinux eu
+merlinux GmbH, Germany, office at merlinux eu
+
+Contributors include::
+
+Aaron Coleman
+Abdeali JK
+Abhijeet Kasurde
+Adam Johnson
+Adam Uhlir
+Ahn Ki-Wook
+Akiomi Kamakura
+Alan Velasco
+Alexander Johnson
+Alexei Kozlenok
+Allan Feldman
+Aly Sivji
+Anatoly Bubenkoff
+Anders Hovmöller
+Andras Mitzki
+Andras Tim
+Andrea Cimatoribus
+Andreas Zeidler
+Andrey Paramonov
+Andrzej Ostrowski
+Andy Freeland
+Anthon van der Neut
+Anthony Shaw
+Anthony Sottile
+Anton Lodder
+Antony Lee
+Arel Cordero
+Armin Rigo
+Aron Coyle
+Aron Curzon
+Aviral Verma
+Aviv Palivoda
+Barney Gale
+Ben Webb
+Benjamin Peterson
+Bernard Pratz
+Bob Ippolito
+Brian Dorsey
+Brian Maissy
+Brian Okken
+Brianna Laugher
+Bruno Oliveira
+Cal Leeming
+Carl Friedrich Bolz
+Carlos Jenkins
+Ceridwen
+Charles Cloud
+Charnjit SiNGH (CCSJ)
+Chris Lamb
+Christian Boelsen
+Christian Fetzer
+Christian Theunert
+Christian Tismer
+Christopher Gilling
+Christopher Dignam
+Claudio Madotto
+CrazyMerlyn
+Cyrus Maden
+Damian Skrzypczak
+Dhiren Serai
+Daniel Grana
+Daniel Hahler
+Daniel Nuri
+Daniel Wandschneider
+Danielle Jenkins
+Dave Hunt
+David Díaz-Barquero
+David Mohr
+David Szotten
+David Vierra
+Daw-Ran Liou
+Denis Kirisov
+Diego Russo
+Dmitry Dygalo
+Dmitry Pribysh
+Duncan Betts
+Edison Gustavo Muenz
+Edoardo Batini
+Eduardo Schettino
+Eli Boyarski
+Elizaveta Shashkova
+Endre Galaczi
+Eric Hunsberger
+Eric Siegerman
+Erik M. Bray
+Evan Kepner
+Fabien Zarifian
+Fabio Zadrozny
+Feng Ma
+Fernando Mezzabotta Rey
+Florian Bruhin
+Floris Bruynooghe
+Gabriel Reis
+George Kussumoto
+Georgy Dyuldin
+Graham Horler
+Greg Price
+Grig Gheorghiu
+Grigorii Eremeev (budulianin)
+Guido Wesdorp
+Guoqiang Zhang
+Harald Armin Massa
+Henk-Jaap Wagenaar
+Hugo van Kemenade
+Hui Wang (coldnight)
+Ian Bicking
+Ian Lesperance
+Ilya Konstantinov
+Ionuț Turturică
+Iwan Briquemont
+Jaap Broekhuizen
+Jan Balster
+Janne Vanhala
+Jason R. Coombs
+Javier Domingo Cansino
+Javier Romero
+Jeff Rackauckas
+Jeff Widman
+Jenni Rinker
+John Eddie Ayson
+John Towler
+Jon Sonesen
+Jonas Obrist
+Jordan Guymon
+Jordan Moldow
+Jordan Speicher
+Joseph Hunkeler
+Joshua Bronson
+Jurko Gospodnetić
+Justyna Janczyszyn
+Kale Kundert
+Katarzyna Jachim
+Katerina Koukiou
+Kevin Cox
+Kevin J. Foley
+Kodi B. Arfer
+Kostis Anagnostopoulos
+Kristoffer Nordström
+Kyle Altendorf
+Lawrence Mitchell
+Lee Kamentsky
+Lev Maximov
+Llandy Riveron Del Risco
+Loic Esteve
+Lukas Bednar
+Luke Murphy
+Maciek Fijalkowski
+Maho
+Maik Figura
+Mandeep Bhutani
+Manuel Krebber
+Marc Schlaich
+Marcelo Duarte Trevisani
+Marcin Bachry
+Mark Abramowitz
+Markus Unterwaditzer
+Martijn Faassen
+Martin Altmayer
+Martin K. Scherer
+Martin Prusse
+Mathieu Clabaut
+Matt Bachmann
+Matt Duck
+Matt Williams
+Matthias Hafner
+Maxim Filipenko
+mbyt
+Michael Aquilina
+Michael Birtwell
+Michael Droettboom
+Michael Seifert
+Michal Wajszczuk
+Mihai Capotă
+Mike Hoyle (hoylemd)
+Mike Lundy
+Miro Hrončok
+Nathaniel Waisbrot
+Ned Batchelder
+Neven Mundar
+Nicholas Devenish
+Nicholas Murphy
+Niclas Olofsson
+Nicolas Delaby
+Nikolay Kondratyev
+Oleg Pidsadnyi
+Oleg Sushchenko
+Oliver Bestwalter
+Omar Kohl
+Omer Hadari
+Ondřej Súkup
+Oscar Benjamin
+Patrick Hayes
+Paweł Adamczak
+Pedro Algarvio
+Pieter Mulder
+Piotr Banaszkiewicz
+Pulkit Goyal
+Punyashloka Biswal
+Quentin Pradet
+Ralf Schmitt
+Ran Benita
+Raphael Castaneda
+Raphael Pierzina
+Raquel Alegre
+Ravi Chandra
+Roberto Polli
+Roland Puntaier
+Romain Dorgueil
+Roman Bolshakov
+Ronny Pfannschmidt
+Ross Lawley
+Russel Winder
+Ryan Wooden
+Samuel Dion-Girardeau
+Samuel Searles-Bryant
+Samuele Pedroni
+Sankt Petersbug
+Segev Finer
+Serhii Mozghovyi
+Simon Gomizelj
+Skylar Downes
+Srinivas Reddy Thatiparthy
+Stefan Farmbauer
+Stefan Zimmermann
+Stefano Taschini
+Steffen Allner
+Stephan Obermann
+Sven-Hendrik Haase
+Tadek Teleżyński
+Takafumi Arakaki
+Tarcisio Fischer
+Tareq Alayan
+Ted Xiao
+Thomas Grainger
+Thomas Hisch
+Tim Strazny
+Tom Dalton
+Tom Viner
+Tomer Keren
+Trevor Bekolay
+Tyler Goodlet
+Tzu-ping Chung
+Vasily Kuznetsov
+Victor Maryama
+Victor Uriarte
+Vidar T. Fauske
+Virgil Dupras
+Vitaly Lashmanov
+Vlad Dragos
+Volodymyr Piskun
+Wil Cooley
+William Lee
+Wim Glenn
+Wouter van Ackooy
+Xuan Luong
+Xuecong Liao
+Zac Hatfield-Dodds
+Zoltán Máté
diff --git a/contrib/python/pytest/py2/LICENSE b/contrib/python/pytest/py2/LICENSE
new file mode 100644
index 0000000000..d14fb7ff4b
--- /dev/null
+++ b/contrib/python/pytest/py2/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2004-2020 Holger Krekel and others
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/contrib/python/pytest/py2/README.rst b/contrib/python/pytest/py2/README.rst
new file mode 100644
index 0000000000..6940897870
--- /dev/null
+++ b/contrib/python/pytest/py2/README.rst
@@ -0,0 +1,138 @@
+.. image:: https://docs.pytest.org/en/latest/_static/pytest1.png
+   :target: https://docs.pytest.org/en/latest/
+   :align: center
+   :alt: pytest
+
+
+------
+
+.. image:: https://img.shields.io/pypi/v/pytest.svg
+    :target: https://pypi.org/project/pytest/
+
+.. image:: https://img.shields.io/conda/vn/conda-forge/pytest.svg
+    :target: https://anaconda.org/conda-forge/pytest
+
+.. image:: https://img.shields.io/pypi/pyversions/pytest.svg
+    :target: https://pypi.org/project/pytest/
+
+.. image:: https://codecov.io/gh/pytest-dev/pytest/branch/master/graph/badge.svg
+    :target: https://codecov.io/gh/pytest-dev/pytest
+    :alt: Code coverage Status
+
+.. image:: https://travis-ci.org/pytest-dev/pytest.svg?branch=master
+    :target: https://travis-ci.org/pytest-dev/pytest
+
+.. image:: https://dev.azure.com/pytest-dev/pytest/_apis/build/status/pytest-CI?branchName=master
+    :target: https://dev.azure.com/pytest-dev/pytest
+
+.. image:: https://img.shields.io/badge/code%20style-black-000000.svg
+    :target: https://github.com/python/black
+
+.. image:: https://www.codetriage.com/pytest-dev/pytest/badges/users.svg
+    :target: https://www.codetriage.com/pytest-dev/pytest
+
+The ``pytest`` framework makes it easy to write small tests, yet
+scales to support complex functional testing for applications and libraries.
+
+An example of a simple test:
+
+.. code-block:: python
+
+    # content of test_sample.py
+    def inc(x):
+        return x + 1
+
+
+    def test_answer():
+        assert inc(3) == 5
+
+
+To execute it::
+
+    $ pytest
+    ============================= test session starts =============================
+    collected 1 items
+
+    test_sample.py F
+
+    ================================== FAILURES ===================================
+    _________________________________ test_answer _________________________________
+
+        def test_answer():
+    >       assert inc(3) == 5
+    E       assert 4 == 5
+    E        +  where 4 = inc(3)
+
+    test_sample.py:5: AssertionError
+    ========================== 1 failed in 0.04 seconds ===========================
+
+
+Due to ``pytest``'s detailed assertion introspection, only plain ``assert`` statements are used. See `getting-started <https://docs.pytest.org/en/latest/getting-started.html#our-first-test-run>`_ for more examples.
+
+
+Features
+--------
+
+- Detailed info on failing `assert statements <https://docs.pytest.org/en/latest/assert.html>`_ (no need to remember ``self.assert*`` names);
+
+- `Auto-discovery
+  <https://docs.pytest.org/en/latest/goodpractices.html#python-test-discovery>`_
+  of test modules and functions;
+
+- `Modular fixtures <https://docs.pytest.org/en/latest/fixture.html>`_ for
+  managing small or parametrized long-lived test resources;
+
+- Can run `unittest <https://docs.pytest.org/en/latest/unittest.html>`_ (or trial),
+  `nose <https://docs.pytest.org/en/latest/nose.html>`_ test suites out of the box;
+
+- Python 2.7, Python 3.4+, PyPy 2.3, Jython 2.5 (untested);
+
+- Rich plugin architecture, with over 315+ `external plugins <http://plugincompat.herokuapp.com>`_ and thriving community;
+
+
+Documentation
+-------------
+
+For full documentation, including installation, tutorials and PDF documents, please see https://docs.pytest.org/en/latest/.
+
+
+Bugs/Requests
+-------------
+
+Please use the `GitHub issue tracker <https://github.com/pytest-dev/pytest/issues>`_ to submit bugs or request features.
+
+
+Changelog
+---------
+
+Consult the `Changelog <https://docs.pytest.org/en/latest/changelog.html>`__ page for fixes and enhancements of each version.
+
+
+Support pytest
+--------------
+
+You can support pytest by obtaining a `Tideflift subscription`_.
+
+Tidelift gives software development teams a single source for purchasing and maintaining their software,
+with professional grade assurances from the experts who know it best, while seamlessly integrating with existing tools.
+
+
+.. _`Tideflift subscription`: https://tidelift.com/subscription/pkg/pypi-pytest?utm_source=pypi-pytest&utm_medium=referral&utm_campaign=readme
+
+
+Security
+^^^^^^^^
+
+pytest has never been associated with a security vunerability, but in any case, to report a
+security vulnerability please use the `Tidelift security contact <https://tidelift.com/security>`_.
+Tidelift will coordinate the fix and disclosure.
+
+
+License
+-------
+
+Copyright Holger Krekel and others, 2004-2020.
+
+Distributed under the terms of the `MIT`_ license, pytest is free and open source software.
+
+.. _`MIT`: https://github.com/pytest-dev/pytest/blob/master/LICENSE
diff --git a/contrib/python/pytest/py2/_pytest/__init__.py b/contrib/python/pytest/py2/_pytest/__init__.py
new file mode 100644
index 0000000000..17cc20b615
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/__init__.py
@@ -0,0 +1,9 @@
+# -*- coding: utf-8 -*-
+__all__ = ["__version__"]
+
+try:
+    from ._version import version as __version__
+except ImportError:
+    # broken installation, we don't even try
+    # unknown only works because we do poor mans version compare
+    __version__ = "unknown"
diff --git a/contrib/python/pytest/py2/_pytest/_argcomplete.py b/contrib/python/pytest/py2/_pytest/_argcomplete.py
new file mode 100644
index 0000000000..c6cf1d8fdd
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/_argcomplete.py
@@ -0,0 +1,110 @@
+# -*- coding: utf-8 -*-
+"""allow bash-completion for argparse with argcomplete if installed
+needs argcomplete>=0.5.6 for python 3.2/3.3 (older versions fail
+to find the magic string, so _ARGCOMPLETE env. var is never set, and
+this does not need special code.
+
+Function try_argcomplete(parser) should be called directly before
+the call to ArgumentParser.parse_args().
+
+The filescompleter is what you normally would use on the positional
+arguments specification, in order to get "dirname/" after "dirn<TAB>"
+instead of the default "dirname ":
+
+   optparser.add_argument(Config._file_or_dir, nargs='*'
+                               ).completer=filescompleter
+
+Other, application specific, completers should go in the file
+doing the add_argument calls as they need to be specified as .completer
+attributes as well. (If argcomplete is not installed, the function the
+attribute points to will not be used).
+
+SPEEDUP
+=======
+The generic argcomplete script for bash-completion
+(/etc/bash_completion.d/python-argcomplete.sh )
+uses a python program to determine startup script generated by pip.
+You can speed up completion somewhat by changing this script to include
+  # PYTHON_ARGCOMPLETE_OK
+so the the python-argcomplete-check-easy-install-script does not
+need to be called to find the entry point of the code and see if that is
+marked  with PYTHON_ARGCOMPLETE_OK
+
+INSTALL/DEBUGGING
+=================
+To include this support in another application that has setup.py generated
+scripts:
+- add the line:
+    # PYTHON_ARGCOMPLETE_OK
+  near the top of the main python entry point
+- include in the file calling parse_args():
+    from _argcomplete import try_argcomplete, filescompleter
+   , call try_argcomplete just before parse_args(), and optionally add
+   filescompleter to the positional arguments' add_argument()
+If things do not work right away:
+- switch on argcomplete debugging with (also helpful when doing custom
+  completers):
+    export _ARC_DEBUG=1
+- run:
+    python-argcomplete-check-easy-install-script $(which appname)
+    echo $?
+  will echo 0 if the magic line has been found, 1 if not
+- sometimes it helps to find early on errors using:
+    _ARGCOMPLETE=1 _ARC_DEBUG=1 appname
+  which should throw a KeyError: 'COMPLINE' (which is properly set by the
+  global argcomplete script).
+"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import os
+import sys
+from glob import glob
+
+
+class FastFilesCompleter(object):
+    "Fast file completer class"
+
+    def __init__(self, directories=True):
+        self.directories = directories
+
+    def __call__(self, prefix, **kwargs):
+        """only called on non option completions"""
+        if os.path.sep in prefix[1:]:
+            prefix_dir = len(os.path.dirname(prefix) + os.path.sep)
+        else:
+            prefix_dir = 0
+        completion = []
+        globbed = []
+        if "*" not in prefix and "?" not in prefix:
+            # we are on unix, otherwise no bash
+            if not prefix or prefix[-1] == os.path.sep:
+                globbed.extend(glob(prefix + ".*"))
+            prefix += "*"
+        globbed.extend(glob(prefix))
+        for x in sorted(globbed):
+            if os.path.isdir(x):
+                x += "/"
+            # append stripping the prefix (like bash, not like compgen)
+            completion.append(x[prefix_dir:])
+        return completion
+
+
+if os.environ.get("_ARGCOMPLETE"):
+    try:
+        import argcomplete.completers
+    except ImportError:
+        sys.exit(-1)
+    filescompleter = FastFilesCompleter()
+
+    def try_argcomplete(parser):
+        argcomplete.autocomplete(parser, always_complete_options=False)
+
+
+else:
+
+    def try_argcomplete(parser):
+        pass
+
+    filescompleter = None
diff --git a/contrib/python/pytest/py2/_pytest/_code/__init__.py b/contrib/python/pytest/py2/_pytest/_code/__init__.py
new file mode 100644
index 0000000000..1394b2b10e
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/_code/__init__.py
@@ -0,0 +1,15 @@
+# -*- coding: utf-8 -*-
+""" python inspection/code generation API """
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+from .code import Code  # noqa
+from .code import ExceptionInfo  # noqa
+from .code import filter_traceback  # noqa
+from .code import Frame  # noqa
+from .code import getrawcode  # noqa
+from .code import Traceback  # noqa
+from .source import compile_ as compile  # noqa
+from .source import getfslineno  # noqa
+from .source import Source  # noqa
diff --git a/contrib/python/pytest/py2/_pytest/_code/_py2traceback.py b/contrib/python/pytest/py2/_pytest/_code/_py2traceback.py
new file mode 100644
index 0000000000..faacc02166
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/_code/_py2traceback.py
@@ -0,0 +1,95 @@
+# -*- coding: utf-8 -*-
+# copied from python-2.7.3's traceback.py
+# CHANGES:
+# - some_str is replaced, trying to create unicode strings
+#
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
+import types
+
+from six import text_type
+
+
+def format_exception_only(etype, value):
+    """Format the exception part of a traceback.
+
+    The arguments are the exception type and value such as given by
+    sys.last_type and sys.last_value. The return value is a list of
+    strings, each ending in a newline.
+
+    Normally, the list contains a single string; however, for
+    SyntaxError exceptions, it contains several lines that (when
+    printed) display detailed information about where the syntax
+    error occurred.
+
+    The message indicating which exception occurred is always the last
+    string in the list.
+
+    """
+
+    # An instance should not have a meaningful value parameter, but
+    # sometimes does, particularly for string exceptions, such as
+    # >>> raise string1, string2  # deprecated
+    #
+    # Clear these out first because issubtype(string1, SyntaxError)
+    # would throw another exception and mask the original problem.
+    if (
+        isinstance(etype, BaseException)
+        or isinstance(etype, types.InstanceType)
+        or etype is None
+        or type(etype) is str
+    ):
+        return [_format_final_exc_line(etype, value)]
+
+    stype = etype.__name__
+
+    if not issubclass(etype, SyntaxError):
+        return [_format_final_exc_line(stype, value)]
+
+    # It was a syntax error; show exactly where the problem was found.
+    lines = []
+    try:
+        msg, (filename, lineno, offset, badline) = value.args
+    except Exception:
+        pass
+    else:
+        filename = filename or "<string>"
+        lines.append('  File "{}", line {}\n'.format(filename, lineno))
+        if badline is not None:
+            if isinstance(badline, bytes):  # python 2 only
+                badline = badline.decode("utf-8", "replace")
+            lines.append("    {}\n".format(badline.strip()))
+            if offset is not None:
+                caretspace = badline.rstrip("\n")[:offset].lstrip()
+                # non-space whitespace (likes tabs) must be kept for alignment
+                caretspace = ((c.isspace() and c or " ") for c in caretspace)
+                # only three spaces to account for offset1 == pos 0
+                lines.append("   {}^\n".format("".join(caretspace)))
+        value = msg
+
+    lines.append(_format_final_exc_line(stype, value))
+    return lines
+
+
+def _format_final_exc_line(etype, value):
+    """Return a list of a single line -- normal case for format_exception_only"""
+    valuestr = _some_str(value)
+    if value is None or not valuestr:
+        line = "{}\n".format(etype)
+    else:
+        line = "{}: {}\n".format(etype, valuestr)
+    return line
+
+
+def _some_str(value):
+    try:
+        return text_type(value)
+    except Exception:
+        try:
+            return bytes(value).decode("UTF-8", "replace")
+        except Exception:
+            pass
+    return "<unprintable {} object>".format(type(value).__name__)
diff --git a/contrib/python/pytest/py2/_pytest/_code/code.py b/contrib/python/pytest/py2/_pytest/_code/code.py
new file mode 100644
index 0000000000..175d6fda01
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/_code/code.py
@@ -0,0 +1,1093 @@
+# -*- coding: utf-8 -*-
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import inspect
+import re
+import sys
+import traceback
+from inspect import CO_VARARGS
+from inspect import CO_VARKEYWORDS
+from weakref import ref
+
+import attr
+import pluggy
+import py
+from six import text_type
+
+import _pytest
+from _pytest._io.saferepr import safeformat
+from _pytest._io.saferepr import saferepr
+from _pytest.compat import _PY2
+from _pytest.compat import _PY3
+from _pytest.compat import PY35
+from _pytest.compat import safe_str
+
+if _PY3:
+    from traceback import format_exception_only
+else:
+    from ._py2traceback import format_exception_only
+
+
+class Code(object):
+    """ wrapper around Python code objects """
+
+    def __init__(self, rawcode):
+        if not hasattr(rawcode, "co_filename"):
+            rawcode = getrawcode(rawcode)
+        try:
+            self.filename = rawcode.co_filename
+            self.firstlineno = rawcode.co_firstlineno - 1
+            self.name = rawcode.co_name
+        except AttributeError:
+            raise TypeError("not a code object: %r" % (rawcode,))
+        self.raw = rawcode
+
+    def __eq__(self, other):
+        return self.raw == other.raw
+
+    __hash__ = None
+
+    def __ne__(self, other):
+        return not self == other
+
+    @property
+    def path(self):
+        """ return a path object pointing to source code (note that it
+        might not point to an actually existing file). """
+        try:
+            p = py.path.local(self.raw.co_filename)
+            # maybe don't try this checking
+            if not p.check():
+                raise OSError("py.path check failed.")
+        except OSError:
+            # XXX maybe try harder like the weird logic
+            # in the standard lib [linecache.updatecache] does?
+            p = self.raw.co_filename
+
+        return p
+
+    @property
+    def fullsource(self):
+        """ return a _pytest._code.Source object for the full source file of the code
+        """
+        from _pytest._code import source
+
+        full, _ = source.findsource(self.raw)
+        return full
+
+    def source(self):
+        """ return a _pytest._code.Source object for the code object's source only
+        """
+        # return source only for that part of code
+        import _pytest._code
+
+        return _pytest._code.Source(self.raw)
+
+    def getargs(self, var=False):
+        """ return a tuple with the argument names for the code object
+
+            if 'var' is set True also return the names of the variable and
+            keyword arguments when present
+        """
+        # handfull shortcut for getting args
+        raw = self.raw
+        argcount = raw.co_argcount
+        if var:
+            argcount += raw.co_flags & CO_VARARGS
+            argcount += raw.co_flags & CO_VARKEYWORDS
+        return raw.co_varnames[:argcount]
+
+
+class Frame(object):
+    """Wrapper around a Python frame holding f_locals and f_globals
+    in which expressions can be evaluated."""
+
+    def __init__(self, frame):
+        self.lineno = frame.f_lineno - 1
+        self.f_globals = frame.f_globals
+        self.f_locals = frame.f_locals
+        self.raw = frame
+        self.code = Code(frame.f_code)
+
+    @property
+    def statement(self):
+        """ statement this frame is at """
+        import _pytest._code
+
+        if self.code.fullsource is None:
+            return _pytest._code.Source("")
+        return self.code.fullsource.getstatement(self.lineno)
+
+    def eval(self, code, **vars):
+        """ evaluate 'code' in the frame
+
+            'vars' are optional additional local variables
+
+            returns the result of the evaluation
+        """
+        f_locals = self.f_locals.copy()
+        f_locals.update(vars)
+        return eval(code, self.f_globals, f_locals)
+
+    def exec_(self, code, **vars):
+        """ exec 'code' in the frame
+
+            'vars' are optiona; additional local variables
+        """
+        f_locals = self.f_locals.copy()
+        f_locals.update(vars)
+        exec(code, self.f_globals, f_locals)
+
+    def repr(self, object):
+        """ return a 'safe' (non-recursive, one-line) string repr for 'object'
+        """
+        return saferepr(object)
+
+    def is_true(self, object):
+        return object
+
+    def getargs(self, var=False):
+        """ return a list of tuples (name, value) for all arguments
+
+            if 'var' is set True also include the variable and keyword
+            arguments when present
+        """
+        retval = []
+        for arg in self.code.getargs(var):
+            try:
+                retval.append((arg, self.f_locals[arg]))
+            except KeyError:
+                pass  # this can occur when using Psyco
+        return retval
+
+
+class TracebackEntry(object):
+    """ a single entry in a traceback """
+
+    _repr_style = None
+    exprinfo = None
+
+    def __init__(self, rawentry, excinfo=None):
+        self._excinfo = excinfo
+        self._rawentry = rawentry
+        self.lineno = rawentry.tb_lineno - 1
+
+    def set_repr_style(self, mode):
+        assert mode in ("short", "long")
+        self._repr_style = mode
+
+    @property
+    def frame(self):
+        import _pytest._code
+
+        return _pytest._code.Frame(self._rawentry.tb_frame)
+
+    @property
+    def relline(self):
+        return self.lineno - self.frame.code.firstlineno
+
+    def __repr__(self):
+        return "<TracebackEntry %s:%d>" % (self.frame.code.path, self.lineno + 1)
+
+    @property
+    def statement(self):
+        """ _pytest._code.Source object for the current statement """
+        source = self.frame.code.fullsource
+        return source.getstatement(self.lineno)
+
+    @property
+    def path(self):
+        """ path to the source code """
+        return self.frame.code.path
+
+    def getlocals(self):
+        return self.frame.f_locals
+
+    locals = property(getlocals, None, None, "locals of underlaying frame")
+
+    def getfirstlinesource(self):
+        # on Jython this firstlineno can be -1 apparently
+        return max(self.frame.code.firstlineno, 0)
+
+    def getsource(self, astcache=None):
+        """ return failing source code. """
+        # we use the passed in astcache to not reparse asttrees
+        # within exception info printing
+        from _pytest._code.source import getstatementrange_ast
+
+        source = self.frame.code.fullsource
+        if source is None:
+            return None
+        key = astnode = None
+        if astcache is not None:
+            key = self.frame.code.path
+            if key is not None:
+                astnode = astcache.get(key, None)
+        start = self.getfirstlinesource()
+        try:
+            astnode, _, end = getstatementrange_ast(
+                self.lineno, source, astnode=astnode
+            )
+        except SyntaxError:
+            end = self.lineno + 1
+        else:
+            if key is not None:
+                astcache[key] = astnode
+        return source[start:end]
+
+    source = property(getsource)
+
+    def ishidden(self):
+        """ return True if the current frame has a var __tracebackhide__
+            resolving to True.
+
+            If __tracebackhide__ is a callable, it gets called with the
+            ExceptionInfo instance and can decide whether to hide the traceback.
+
+            mostly for internal use
+        """
+        f = self.frame
+        tbh = f.f_locals.get(
+            "__tracebackhide__", f.f_globals.get("__tracebackhide__", False)
+        )
+        if tbh and callable(tbh):
+            return tbh(None if self._excinfo is None else self._excinfo())
+        return tbh
+
+    def __str__(self):
+        try:
+            fn = str(self.path)
+        except py.error.Error:
+            fn = "???"
+        name = self.frame.code.name
+        try:
+            line = str(self.statement).lstrip()
+        except KeyboardInterrupt:
+            raise
+        except:  # noqa
+            line = "???"
+        return "  File %r:%d in %s\n  %s\n" % (fn, self.lineno + 1, name, line)
+
+    def name(self):
+        return self.frame.code.raw.co_name
+
+    name = property(name, None, None, "co_name of underlaying code")
+
+
+class Traceback(list):
+    """ Traceback objects encapsulate and offer higher level
+        access to Traceback entries.
+    """
+
+    Entry = TracebackEntry
+
+    def __init__(self, tb, excinfo=None):
+        """ initialize from given python traceback object and ExceptionInfo """
+        self._excinfo = excinfo
+        if hasattr(tb, "tb_next"):
+
+            def f(cur):
+                while cur is not None:
+                    yield self.Entry(cur, excinfo=excinfo)
+                    cur = cur.tb_next
+
+            list.__init__(self, f(tb))
+        else:
+            list.__init__(self, tb)
+
+    def cut(self, path=None, lineno=None, firstlineno=None, excludepath=None):
+        """ return a Traceback instance wrapping part of this Traceback
+
+            by provding any combination of path, lineno and firstlineno, the
+            first frame to start the to-be-returned traceback is determined
+
+            this allows cutting the first part of a Traceback instance e.g.
+            for formatting reasons (removing some uninteresting bits that deal
+            with handling of the exception/traceback)
+        """
+        for x in self:
+            code = x.frame.code
+            codepath = code.path
+            if (
+                (path is None or codepath == path)
+                and (
+                    excludepath is None
+                    or not hasattr(codepath, "relto")
+                    or not codepath.relto(excludepath)
+                )
+                and (lineno is None or x.lineno == lineno)
+                and (firstlineno is None or x.frame.code.firstlineno == firstlineno)
+            ):
+                return Traceback(x._rawentry, self._excinfo)
+        return self
+
+    def __getitem__(self, key):
+        val = super(Traceback, self).__getitem__(key)
+        if isinstance(key, type(slice(0))):
+            val = self.__class__(val)
+        return val
+
+    def filter(self, fn=lambda x: not x.ishidden()):
+        """ return a Traceback instance with certain items removed
+
+            fn is a function that gets a single argument, a TracebackEntry
+            instance, and should return True when the item should be added
+            to the Traceback, False when not
+
+            by default this removes all the TracebackEntries which are hidden
+            (see ishidden() above)
+        """
+        return Traceback(filter(fn, self), self._excinfo)
+
+    def getcrashentry(self):
+        """ return last non-hidden traceback entry that lead
+        to the exception of a traceback.
+        """
+        for i in range(-1, -len(self) - 1, -1):
+            entry = self[i]
+            if not entry.ishidden():
+                return entry
+        return self[-1]
+
+    def recursionindex(self):
+        """ return the index of the frame/TracebackEntry where recursion
+            originates if appropriate, None if no recursion occurred
+        """
+        cache = {}
+        for i, entry in enumerate(self):
+            # id for the code.raw is needed to work around
+            # the strange metaprogramming in the decorator lib from pypi
+            # which generates code objects that have hash/value equality
+            # XXX needs a test
+            key = entry.frame.code.path, id(entry.frame.code.raw), entry.lineno
+            # print "checking for recursion at", key
+            values = cache.setdefault(key, [])
+            if values:
+                f = entry.frame
+                loc = f.f_locals
+                for otherloc in values:
+                    if f.is_true(
+                        f.eval(
+                            co_equal,
+                            __recursioncache_locals_1=loc,
+                            __recursioncache_locals_2=otherloc,
+                        )
+                    ):
+                        return i
+            values.append(entry.frame.f_locals)
+        return None
+
+
+co_equal = compile(
+    "__recursioncache_locals_1 == __recursioncache_locals_2", "?", "eval"
+)
+
+
+@attr.s(repr=False)
+class ExceptionInfo(object):
+    """ wraps sys.exc_info() objects and offers
+        help for navigating the traceback.
+    """
+
+    _assert_start_repr = (
+        "AssertionError(u'assert " if _PY2 else "AssertionError('assert "
+    )
+
+    _excinfo = attr.ib()
+    _striptext = attr.ib(default="")
+    _traceback = attr.ib(default=None)
+
+    @classmethod
+    def from_current(cls, exprinfo=None):
+        """returns an ExceptionInfo matching the current traceback
+
+        .. warning::
+
+            Experimental API
+
+
+        :param exprinfo: a text string helping to determine if we should
+                         strip ``AssertionError`` from the output, defaults
+                         to the exception message/``__str__()``
+        """
+        tup = sys.exc_info()
+        assert tup[0] is not None, "no current exception"
+        _striptext = ""
+        if exprinfo is None and isinstance(tup[1], AssertionError):
+            exprinfo = getattr(tup[1], "msg", None)
+            if exprinfo is None:
+                exprinfo = saferepr(tup[1])
+            if exprinfo and exprinfo.startswith(cls._assert_start_repr):
+                _striptext = "AssertionError: "
+
+        return cls(tup, _striptext)
+
+    @classmethod
+    def for_later(cls):
+        """return an unfilled ExceptionInfo
+        """
+        return cls(None)
+
+    @property
+    def type(self):
+        """the exception class"""
+        return self._excinfo[0]
+
+    @property
+    def value(self):
+        """the exception value"""
+        return self._excinfo[1]
+
+    @property
+    def tb(self):
+        """the exception raw traceback"""
+        return self._excinfo[2]
+
+    @property
+    def typename(self):
+        """the type name of the exception"""
+        return self.type.__name__
+
+    @property
+    def traceback(self):
+        """the traceback"""
+        if self._traceback is None:
+            self._traceback = Traceback(self.tb, excinfo=ref(self))
+        return self._traceback
+
+    @traceback.setter
+    def traceback(self, value):
+        self._traceback = value
+
+    def __repr__(self):
+        if self._excinfo is None:
+            return "<ExceptionInfo for raises contextmanager>"
+        return "<ExceptionInfo %s tblen=%d>" % (self.typename, len(self.traceback))
+
+    def exconly(self, tryshort=False):
+        """ return the exception as a string
+
+            when 'tryshort' resolves to True, and the exception is a
+            _pytest._code._AssertionError, only the actual exception part of
+            the exception representation is returned (so 'AssertionError: ' is
+            removed from the beginning)
+        """
+        lines = format_exception_only(self.type, self.value)
+        text = "".join(lines)
+        text = text.rstrip()
+        if tryshort:
+            if text.startswith(self._striptext):
+                text = text[len(self._striptext) :]
+        return text
+
+    def errisinstance(self, exc):
+        """ return True if the exception is an instance of exc """
+        return isinstance(self.value, exc)
+
+    def _getreprcrash(self):
+        exconly = self.exconly(tryshort=True)
+        entry = self.traceback.getcrashentry()
+        path, lineno = entry.frame.code.raw.co_filename, entry.lineno
+        return ReprFileLocation(path, lineno + 1, exconly)
+
+    def getrepr(
+        self,
+        showlocals=False,
+        style="long",
+        abspath=False,
+        tbfilter=True,
+        funcargs=False,
+        truncate_locals=True,
+        chain=True,
+    ):
+        """
+        Return str()able representation of this exception info.
+
+        :param bool showlocals:
+            Show locals per traceback entry.
+            Ignored if ``style=="native"``.
+
+        :param str style: long|short|no|native traceback style
+
+        :param bool abspath:
+            If paths should be changed to absolute or left unchanged.
+
+        :param bool tbfilter:
+            Hide entries that contain a local variable ``__tracebackhide__==True``.
+            Ignored if ``style=="native"``.
+
+        :param bool funcargs:
+            Show fixtures ("funcargs" for legacy purposes) per traceback entry.
+
+        :param bool truncate_locals:
+            With ``showlocals==True``, make sure locals can be safely represented as strings.
+
+        :param bool chain: if chained exceptions in Python 3 should be shown.
+
+        .. versionchanged:: 3.9
+
+            Added the ``chain`` parameter.
+        """
+        if style == "native":
+            return ReprExceptionInfo(
+                ReprTracebackNative(
+                    traceback.format_exception(
+                        self.type, self.value, self.traceback[0]._rawentry
+                    )
+                ),
+                self._getreprcrash(),
+            )
+
+        fmt = FormattedExcinfo(
+            showlocals=showlocals,
+            style=style,
+            abspath=abspath,
+            tbfilter=tbfilter,
+            funcargs=funcargs,
+            truncate_locals=truncate_locals,
+            chain=chain,
+        )
+        return fmt.repr_excinfo(self)
+
+    def __str__(self):
+        if self._excinfo is None:
+            return repr(self)
+        entry = self.traceback[-1]
+        loc = ReprFileLocation(entry.path, entry.lineno + 1, self.exconly())
+        return str(loc)
+
+    def __unicode__(self):
+        entry = self.traceback[-1]
+        loc = ReprFileLocation(entry.path, entry.lineno + 1, self.exconly())
+        return text_type(loc)
+
+    def match(self, regexp):
+        """
+        Check whether the regular expression 'regexp' is found in the string
+        representation of the exception using ``re.search``. If it matches
+        then True is returned (so that it is possible to write
+        ``assert excinfo.match()``). If it doesn't match an AssertionError is
+        raised.
+        """
+        __tracebackhide__ = True
+        value = (
+            text_type(self.value) if isinstance(regexp, text_type) else str(self.value)
+        )
+        if not re.search(regexp, value):
+            raise AssertionError(
+                u"Pattern {!r} not found in {!r}".format(regexp, value)
+            )
+        return True
+
+
+@attr.s
+class FormattedExcinfo(object):
+    """ presenting information about failing Functions and Generators. """
+
+    # for traceback entries
+    flow_marker = ">"
+    fail_marker = "E"
+
+    showlocals = attr.ib(default=False)
+    style = attr.ib(default="long")
+    abspath = attr.ib(default=True)
+    tbfilter = attr.ib(default=True)
+    funcargs = attr.ib(default=False)
+    truncate_locals = attr.ib(default=True)
+    chain = attr.ib(default=True)
+    astcache = attr.ib(default=attr.Factory(dict), init=False, repr=False)
+
+    def _getindent(self, source):
+        # figure out indent for given source
+        try:
+            s = str(source.getstatement(len(source) - 1))
+        except KeyboardInterrupt:
+            raise
+        except:  # noqa
+            try:
+                s = str(source[-1])
+            except KeyboardInterrupt:
+                raise
+            except:  # noqa
+                return 0
+        return 4 + (len(s) - len(s.lstrip()))
+
+    def _getentrysource(self, entry):
+        source = entry.getsource(self.astcache)
+        if source is not None:
+            source = source.deindent()
+        return source
+
+    def repr_args(self, entry):
+        if self.funcargs:
+            args = []
+            for argname, argvalue in entry.frame.getargs(var=True):
+                args.append((argname, saferepr(argvalue)))
+            return ReprFuncArgs(args)
+
+    def get_source(self, source, line_index=-1, excinfo=None, short=False):
+        """ return formatted and marked up source lines. """
+        import _pytest._code
+
+        lines = []
+        if source is None or line_index >= len(source.lines):
+            source = _pytest._code.Source("???")
+            line_index = 0
+        if line_index < 0:
+            line_index += len(source)
+        space_prefix = "    "
+        if short:
+            lines.append(space_prefix + source.lines[line_index].strip())
+        else:
+            for line in source.lines[:line_index]:
+                lines.append(space_prefix + line)
+            lines.append(self.flow_marker + "   " + source.lines[line_index])
+            for line in source.lines[line_index + 1 :]:
+                lines.append(space_prefix + line)
+        if excinfo is not None:
+            indent = 4 if short else self._getindent(source)
+            lines.extend(self.get_exconly(excinfo, indent=indent, markall=True))
+        return lines
+
+    def get_exconly(self, excinfo, indent=4, markall=False):
+        lines = []
+        indent = " " * indent
+        # get the real exception information out
+        exlines = excinfo.exconly(tryshort=True).split("\n")
+        failindent = self.fail_marker + indent[1:]
+        for line in exlines:
+            lines.append(failindent + line)
+            if not markall:
+                failindent = indent
+        return lines
+
+    def repr_locals(self, locals):
+        if self.showlocals:
+            lines = []
+            keys = [loc for loc in locals if loc[0] != "@"]
+            keys.sort()
+            for name in keys:
+                value = locals[name]
+                if name == "__builtins__":
+                    lines.append("__builtins__ = <builtins>")
+                else:
+                    # This formatting could all be handled by the
+                    # _repr() function, which is only reprlib.Repr in
+                    # disguise, so is very configurable.
+                    if self.truncate_locals:
+                        str_repr = saferepr(value)
+                    else:
+                        str_repr = safeformat(value)
+                    # if len(str_repr) < 70 or not isinstance(value,
+                    #                            (list, tuple, dict)):
+                    lines.append("%-10s = %s" % (name, str_repr))
+                    # else:
+                    #    self._line("%-10s =\\" % (name,))
+                    #    # XXX
+                    #    pprint.pprint(value, stream=self.excinfowriter)
+            return ReprLocals(lines)
+
+    def repr_traceback_entry(self, entry, excinfo=None):
+        import _pytest._code
+
+        source = self._getentrysource(entry)
+        if source is None:
+            source = _pytest._code.Source("???")
+            line_index = 0
+        else:
+            # entry.getfirstlinesource() can be -1, should be 0 on jython
+            line_index = entry.lineno - max(entry.getfirstlinesource(), 0)
+
+        lines = []
+        style = entry._repr_style
+        if style is None:
+            style = self.style
+        if style in ("short", "long"):
+            short = style == "short"
+            reprargs = self.repr_args(entry) if not short else None
+            s = self.get_source(source, line_index, excinfo, short=short)
+            lines.extend(s)
+            if short:
+                message = "in %s" % (entry.name)
+            else:
+                message = excinfo and excinfo.typename or ""
+            path = self._makepath(entry.path)
+            filelocrepr = ReprFileLocation(path, entry.lineno + 1, message)
+            localsrepr = None
+            if not short:
+                localsrepr = self.repr_locals(entry.locals)
+            return ReprEntry(lines, reprargs, localsrepr, filelocrepr, style)
+        if excinfo:
+            lines.extend(self.get_exconly(excinfo, indent=4))
+        return ReprEntry(lines, None, None, None, style)
+
+    def _makepath(self, path):
+        if not self.abspath:
+            try:
+                np = py.path.local().bestrelpath(path)
+            except OSError:
+                return path
+            if len(np) < len(str(path)):
+                path = np
+        return path
+
+    def repr_traceback(self, excinfo):
+        traceback = excinfo.traceback
+        if self.tbfilter:
+            traceback = traceback.filter()
+
+        if is_recursion_error(excinfo):
+            traceback, extraline = self._truncate_recursive_traceback(traceback)
+        else:
+            extraline = None
+
+        last = traceback[-1]
+        entries = []
+        for index, entry in enumerate(traceback):
+            einfo = (last == entry) and excinfo or None
+            reprentry = self.repr_traceback_entry(entry, einfo)
+            entries.append(reprentry)
+        return ReprTraceback(entries, extraline, style=self.style)
+
+    def _truncate_recursive_traceback(self, traceback):
+        """
+        Truncate the given recursive traceback trying to find the starting point
+        of the recursion.
+
+        The detection is done by going through each traceback entry and finding the
+        point in which the locals of the frame are equal to the locals of a previous frame (see ``recursionindex()``.
+
+        Handle the situation where the recursion process might raise an exception (for example
+        comparing numpy arrays using equality raises a TypeError), in which case we do our best to
+        warn the user of the error and show a limited traceback.
+        """
+        try:
+            recursionindex = traceback.recursionindex()
+        except Exception as e:
+            max_frames = 10
+            extraline = (
+                "!!! Recursion error detected, but an error occurred locating the origin of recursion.\n"
+                "  The following exception happened when comparing locals in the stack frame:\n"
+                "    {exc_type}: {exc_msg}\n"
+                "  Displaying first and last {max_frames} stack frames out of {total}."
+            ).format(
+                exc_type=type(e).__name__,
+                exc_msg=safe_str(e),
+                max_frames=max_frames,
+                total=len(traceback),
+            )
+            traceback = traceback[:max_frames] + traceback[-max_frames:]
+        else:
+            if recursionindex is not None:
+                extraline = "!!! Recursion detected (same locals & position)"
+                traceback = traceback[: recursionindex + 1]
+            else:
+                extraline = None
+
+        return traceback, extraline
+
+    def repr_excinfo(self, excinfo):
+        if _PY2:
+            reprtraceback = self.repr_traceback(excinfo)
+            reprcrash = excinfo._getreprcrash()
+
+            return ReprExceptionInfo(reprtraceback, reprcrash)
+        else:
+            repr_chain = []
+            e = excinfo.value
+            descr = None
+            seen = set()
+            while e is not None and id(e) not in seen:
+                seen.add(id(e))
+                if excinfo:
+                    reprtraceback = self.repr_traceback(excinfo)
+                    reprcrash = excinfo._getreprcrash()
+                else:
+                    # fallback to native repr if the exception doesn't have a traceback:
+                    # ExceptionInfo objects require a full traceback to work
+                    reprtraceback = ReprTracebackNative(
+                        traceback.format_exception(type(e), e, None)
+                    )
+                    reprcrash = None
+
+                repr_chain += [(reprtraceback, reprcrash, descr)]
+                if e.__cause__ is not None and self.chain:
+                    e = e.__cause__
+                    excinfo = (
+                        ExceptionInfo((type(e), e, e.__traceback__))
+                        if e.__traceback__
+                        else None
+                    )
+                    descr = "The above exception was the direct cause of the following exception:"
+                elif (
+                    e.__context__ is not None
+                    and not e.__suppress_context__
+                    and self.chain
+                ):
+                    e = e.__context__
+                    excinfo = (
+                        ExceptionInfo((type(e), e, e.__traceback__))
+                        if e.__traceback__
+                        else None
+                    )
+                    descr = "During handling of the above exception, another exception occurred:"
+                else:
+                    e = None
+            repr_chain.reverse()
+            return ExceptionChainRepr(repr_chain)
+
+
+class TerminalRepr(object):
+    def __str__(self):
+        s = self.__unicode__()
+        if _PY2:
+            s = s.encode("utf-8")
+        return s
+
+    def __unicode__(self):
+        # FYI this is called from pytest-xdist's serialization of exception
+        # information.
+        io = py.io.TextIO()
+        tw = py.io.TerminalWriter(file=io)
+        self.toterminal(tw)
+        return io.getvalue().strip()
+
+    def __repr__(self):
+        return "<%s instance at %0x>" % (self.__class__, id(self))
+
+
+class ExceptionRepr(TerminalRepr):
+    def __init__(self):
+        self.sections = []
+
+    def addsection(self, name, content, sep="-"):
+        self.sections.append((name, content, sep))
+
+    def toterminal(self, tw):
+        for name, content, sep in self.sections:
+            tw.sep(sep, name)
+            tw.line(content)
+
+
+class ExceptionChainRepr(ExceptionRepr):
+    def __init__(self, chain):
+        super(ExceptionChainRepr, self).__init__()
+        self.chain = chain
+        # reprcrash and reprtraceback of the outermost (the newest) exception
+        # in the chain
+        self.reprtraceback = chain[-1][0]
+        self.reprcrash = chain[-1][1]
+
+    def toterminal(self, tw):
+        for element in self.chain:
+            element[0].toterminal(tw)
+            if element[2] is not None:
+                tw.line("")
+                tw.line(element[2], yellow=True)
+        super(ExceptionChainRepr, self).toterminal(tw)
+
+
+class ReprExceptionInfo(ExceptionRepr):
+    def __init__(self, reprtraceback, reprcrash):
+        super(ReprExceptionInfo, self).__init__()
+        self.reprtraceback = reprtraceback
+        self.reprcrash = reprcrash
+
+    def toterminal(self, tw):
+        self.reprtraceback.toterminal(tw)
+        super(ReprExceptionInfo, self).toterminal(tw)
+
+
+class ReprTraceback(TerminalRepr):
+    entrysep = "_ "
+
+    def __init__(self, reprentries, extraline, style):
+        self.reprentries = reprentries
+        self.extraline = extraline
+        self.style = style
+
+    def toterminal(self, tw):
+        # the entries might have different styles
+        for i, entry in enumerate(self.reprentries):
+            if entry.style == "long":
+                tw.line("")
+            entry.toterminal(tw)
+            if i < len(self.reprentries) - 1:
+                next_entry = self.reprentries[i + 1]
+                if (
+                    entry.style == "long"
+                    or entry.style == "short"
+                    and next_entry.style == "long"
+                ):
+                    tw.sep(self.entrysep)
+
+        if self.extraline:
+            tw.line(self.extraline)
+
+
+class ReprTracebackNative(ReprTraceback):
+    def __init__(self, tblines):
+        self.style = "native"
+        self.reprentries = [ReprEntryNative(tblines)]
+        self.extraline = None
+
+
+class ReprEntryNative(TerminalRepr):
+    style = "native"
+
+    def __init__(self, tblines):
+        self.lines = tblines
+
+    def toterminal(self, tw):
+        tw.write("".join(self.lines))
+
+
+class ReprEntry(TerminalRepr):
+    def __init__(self, lines, reprfuncargs, reprlocals, filelocrepr, style):
+        self.lines = lines
+        self.reprfuncargs = reprfuncargs
+        self.reprlocals = reprlocals
+        self.reprfileloc = filelocrepr
+        self.style = style
+
+    def toterminal(self, tw):
+        if self.style == "short":
+            self.reprfileloc.toterminal(tw)
+            for line in self.lines:
+                red = line.startswith("E   ")
+                tw.line(line, bold=True, red=red)
+            # tw.line("")
+            return
+        if self.reprfuncargs:
+            self.reprfuncargs.toterminal(tw)
+        for line in self.lines:
+            red = line.startswith("E   ")
+            tw.line(line, bold=True, red=red)
+        if self.reprlocals:
+            tw.line("")
+            self.reprlocals.toterminal(tw)
+        if self.reprfileloc:
+            if self.lines:
+                tw.line("")
+            self.reprfileloc.toterminal(tw)
+
+    def __str__(self):
+        return "%s\n%s\n%s" % ("\n".join(self.lines), self.reprlocals, self.reprfileloc)
+
+
+class ReprFileLocation(TerminalRepr):
+    def __init__(self, path, lineno, message):
+        self.path = str(path)
+        self.lineno = lineno
+        self.message = message
+
+    def toterminal(self, tw):
+        # filename and lineno output for each entry,
+        # using an output format that most editors unterstand
+        msg = self.message
+        i = msg.find("\n")
+        if i != -1:
+            msg = msg[:i]
+        tw.write(self.path, bold=True, red=True)
+        tw.line(":%s: %s" % (self.lineno, msg))
+
+
+class ReprLocals(TerminalRepr):
+    def __init__(self, lines):
+        self.lines = lines
+
+    def toterminal(self, tw):
+        for line in self.lines:
+            tw.line(line)
+
+
+class ReprFuncArgs(TerminalRepr):
+    def __init__(self, args):
+        self.args = args
+
+    def toterminal(self, tw):
+        if self.args:
+            linesofar = ""
+            for name, value in self.args:
+                ns = "%s = %s" % (safe_str(name), safe_str(value))
+                if len(ns) + len(linesofar) + 2 > tw.fullwidth:
+                    if linesofar:
+                        tw.line(linesofar)
+                    linesofar = ns
+                else:
+                    if linesofar:
+                        linesofar += ", " + ns
+                    else:
+                        linesofar = ns
+            if linesofar:
+                tw.line(linesofar)
+            tw.line("")
+
+
+def getrawcode(obj, trycall=True):
+    """ return code object for given function. """
+    try:
+        return obj.__code__
+    except AttributeError:
+        obj = getattr(obj, "im_func", obj)
+        obj = getattr(obj, "func_code", obj)
+        obj = getattr(obj, "f_code", obj)
+        obj = getattr(obj, "__code__", obj)
+        if trycall and not hasattr(obj, "co_firstlineno"):
+            if hasattr(obj, "__call__") and not inspect.isclass(obj):
+                x = getrawcode(obj.__call__, trycall=False)
+                if hasattr(x, "co_firstlineno"):
+                    return x
+        return obj
+
+
+if PY35:  # RecursionError introduced in 3.5
+
+    def is_recursion_error(excinfo):
+        return excinfo.errisinstance(RecursionError)  # noqa
+
+
+else:
+
+    def is_recursion_error(excinfo):
+        if not excinfo.errisinstance(RuntimeError):
+            return False
+        try:
+            return "maximum recursion depth exceeded" in str(excinfo.value)
+        except UnicodeError:
+            return False
+
+
+# relative paths that we use to filter traceback entries from appearing to the user;
+# see filter_traceback
+# note: if we need to add more paths than what we have now we should probably use a list
+# for better maintenance
+
+_PLUGGY_DIR = py.path.local(pluggy.__file__.rstrip("oc"))
+# pluggy is either a package or a single module depending on the version
+if _PLUGGY_DIR.basename == "__init__.py":
+    _PLUGGY_DIR = _PLUGGY_DIR.dirpath()
+_PYTEST_DIR = py.path.local(_pytest.__file__).dirpath()
+_PY_DIR = py.path.local(py.__file__).dirpath()
+
+
+def filter_traceback(entry):
+    """Return True if a TracebackEntry instance should be removed from tracebacks:
+    * dynamically generated code (no code to show up for it);
+    * internal traceback from pytest or its internal libraries, py and pluggy.
+    """
+    # entry.path might sometimes return a str object when the entry
+    # points to dynamically generated code
+    # see https://bitbucket.org/pytest-dev/py/issues/71
+    raw_filename = entry.frame.code.raw.co_filename
+    is_generated = "<" in raw_filename and ">" in raw_filename
+    if is_generated:
+        return False
+    # entry.path might point to a non-existing file, in which case it will
+    # also return a str object. see #1133
+    p = py.path.local(entry.path)
+    return (
+        not p.relto(_PLUGGY_DIR) and not p.relto(_PYTEST_DIR) and not p.relto(_PY_DIR)
+    )
diff --git a/contrib/python/pytest/py2/_pytest/_code/source.py b/contrib/python/pytest/py2/_pytest/_code/source.py
new file mode 100644
index 0000000000..b35e97b9ce
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/_code/source.py
@@ -0,0 +1,324 @@
+# -*- coding: utf-8 -*-
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import ast
+import inspect
+import linecache
+import sys
+import textwrap
+import tokenize
+import warnings
+from ast import PyCF_ONLY_AST as _AST_FLAG
+from bisect import bisect_right
+
+import py
+import six
+
+
+class Source(object):
+    """ an immutable object holding a source code fragment,
+        possibly deindenting it.
+    """
+
+    _compilecounter = 0
+
+    def __init__(self, *parts, **kwargs):
+        self.lines = lines = []
+        de = kwargs.get("deindent", True)
+        for part in parts:
+            if not part:
+                partlines = []
+            elif isinstance(part, Source):
+                partlines = part.lines
+            elif isinstance(part, (tuple, list)):
+                partlines = [x.rstrip("\n") for x in part]
+            elif isinstance(part, six.string_types):
+                partlines = part.split("\n")
+            else:
+                partlines = getsource(part, deindent=de).lines
+            if de:
+                partlines = deindent(partlines)
+            lines.extend(partlines)
+
+    def __eq__(self, other):
+        try:
+            return self.lines == other.lines
+        except AttributeError:
+            if isinstance(other, str):
+                return str(self) == other
+            return False
+
+    __hash__ = None
+
+    def __getitem__(self, key):
+        if isinstance(key, int):
+            return self.lines[key]
+        else:
+            if key.step not in (None, 1):
+                raise IndexError("cannot slice a Source with a step")
+            newsource = Source()
+            newsource.lines = self.lines[key.start : key.stop]
+            return newsource
+
+    def __len__(self):
+        return len(self.lines)
+
+    def strip(self):
+        """ return new source object with trailing
+            and leading blank lines removed.
+        """
+        start, end = 0, len(self)
+        while start < end and not self.lines[start].strip():
+            start += 1
+        while end > start and not self.lines[end - 1].strip():
+            end -= 1
+        source = Source()
+        source.lines[:] = self.lines[start:end]
+        return source
+
+    def putaround(self, before="", after="", indent=" " * 4):
+        """ return a copy of the source object with
+            'before' and 'after' wrapped around it.
+        """
+        before = Source(before)
+        after = Source(after)
+        newsource = Source()
+        lines = [(indent + line) for line in self.lines]
+        newsource.lines = before.lines + lines + after.lines
+        return newsource
+
+    def indent(self, indent=" " * 4):
+        """ return a copy of the source object with
+            all lines indented by the given indent-string.
+        """
+        newsource = Source()
+        newsource.lines = [(indent + line) for line in self.lines]
+        return newsource
+
+    def getstatement(self, lineno):
+        """ return Source statement which contains the
+            given linenumber (counted from 0).
+        """
+        start, end = self.getstatementrange(lineno)
+        return self[start:end]
+
+    def getstatementrange(self, lineno):
+        """ return (start, end) tuple which spans the minimal
+            statement region which containing the given lineno.
+        """
+        if not (0 <= lineno < len(self)):
+            raise IndexError("lineno out of range")
+        ast, start, end = getstatementrange_ast(lineno, self)
+        return start, end
+
+    def deindent(self):
+        """return a new source object deindented."""
+        newsource = Source()
+        newsource.lines[:] = deindent(self.lines)
+        return newsource
+
+    def isparseable(self, deindent=True):
+        """ return True if source is parseable, heuristically
+            deindenting it by default.
+        """
+        if deindent:
+            source = str(self.deindent())
+        else:
+            source = str(self)
+        try:
+            ast.parse(source)
+        except (SyntaxError, ValueError, TypeError):
+            return False
+        else:
+            return True
+
+    def __str__(self):
+        return "\n".join(self.lines)
+
+    def compile(
+        self, filename=None, mode="exec", flag=0, dont_inherit=0, _genframe=None
+    ):
+        """ return compiled code object. if filename is None
+            invent an artificial filename which displays
+            the source/line position of the caller frame.
+        """
+        if not filename or py.path.local(filename).check(file=0):
+            if _genframe is None:
+                _genframe = sys._getframe(1)  # the caller
+            fn, lineno = _genframe.f_code.co_filename, _genframe.f_lineno
+            base = "<%d-codegen " % self._compilecounter
+            self.__class__._compilecounter += 1
+            if not filename:
+                filename = base + "%s:%d>" % (fn, lineno)
+            else:
+                filename = base + "%r %s:%d>" % (filename, fn, lineno)
+        source = "\n".join(self.lines) + "\n"
+        try:
+            co = compile(source, filename, mode, flag)
+        except SyntaxError:
+            ex = sys.exc_info()[1]
+            # re-represent syntax errors from parsing python strings
+            msglines = self.lines[: ex.lineno]
+            if ex.offset:
+                msglines.append(" " * ex.offset + "^")
+            msglines.append("(code was compiled probably from here: %s)" % filename)
+            newex = SyntaxError("\n".join(msglines))
+            newex.offset = ex.offset
+            newex.lineno = ex.lineno
+            newex.text = ex.text
+            raise newex
+        else:
+            if flag & _AST_FLAG:
+                return co
+            lines = [(x + "\n") for x in self.lines]
+            linecache.cache[filename] = (1, None, lines, filename)
+            return co
+
+
+#
+# public API shortcut functions
+#
+
+
+def compile_(source, filename=None, mode="exec", flags=0, dont_inherit=0):
+    """ compile the given source to a raw code object,
+        and maintain an internal cache which allows later
+        retrieval of the source code for the code object
+        and any recursively created code objects.
+    """
+    if isinstance(source, ast.AST):
+        # XXX should Source support having AST?
+        return compile(source, filename, mode, flags, dont_inherit)
+    _genframe = sys._getframe(1)  # the caller
+    s = Source(source)
+    co = s.compile(filename, mode, flags, _genframe=_genframe)
+    return co
+
+
+def getfslineno(obj):
+    """ Return source location (path, lineno) for the given object.
+    If the source cannot be determined return ("", -1).
+
+    The line number is 0-based.
+    """
+    from .code import Code
+
+    try:
+        code = Code(obj)
+    except TypeError:
+        try:
+            fn = inspect.getsourcefile(obj) or inspect.getfile(obj)
+        except TypeError:
+            return "", -1
+
+        fspath = fn and py.path.local(fn) or None
+        lineno = -1
+        if fspath:
+            try:
+                _, lineno = findsource(obj)
+            except IOError:
+                pass
+    else:
+        fspath = code.path
+        lineno = code.firstlineno
+    assert isinstance(lineno, int)
+    return fspath, lineno
+
+
+#
+# helper functions
+#
+
+
+def findsource(obj):
+    try:
+        sourcelines, lineno = inspect.findsource(obj)
+    except Exception:
+        return None, -1
+    source = Source()
+    source.lines = [line.rstrip() for line in sourcelines]
+    return source, lineno
+
+
+def getsource(obj, **kwargs):
+    from .code import getrawcode
+
+    obj = getrawcode(obj)
+    try:
+        strsrc = inspect.getsource(obj)
+    except IndentationError:
+        strsrc = '"Buggy python version consider upgrading, cannot get source"'
+    assert isinstance(strsrc, str)
+    return Source(strsrc, **kwargs)
+
+
+def deindent(lines):
+    return textwrap.dedent("\n".join(lines)).splitlines()
+
+
+def get_statement_startend2(lineno, node):
+    import ast
+
+    # flatten all statements and except handlers into one lineno-list
+    # AST's line numbers start indexing at 1
+    values = []
+    for x in ast.walk(node):
+        if isinstance(x, (ast.stmt, ast.ExceptHandler)):
+            values.append(x.lineno - 1)
+            for name in ("finalbody", "orelse"):
+                val = getattr(x, name, None)
+                if val:
+                    # treat the finally/orelse part as its own statement
+                    values.append(val[0].lineno - 1 - 1)
+    values.sort()
+    insert_index = bisect_right(values, lineno)
+    start = values[insert_index - 1]
+    if insert_index >= len(values):
+        end = None
+    else:
+        end = values[insert_index]
+    return start, end
+
+
+def getstatementrange_ast(lineno, source, assertion=False, astnode=None):
+    if astnode is None:
+        content = str(source)
+        # See #4260:
+        # don't produce duplicate warnings when compiling source to find ast
+        with warnings.catch_warnings():
+            warnings.simplefilter("ignore")
+            astnode = compile(content, "source", "exec", _AST_FLAG)
+
+    start, end = get_statement_startend2(lineno, astnode)
+    # we need to correct the end:
+    # - ast-parsing strips comments
+    # - there might be empty lines
+    # - we might have lesser indented code blocks at the end
+    if end is None:
+        end = len(source.lines)
+
+    if end > start + 1:
+        # make sure we don't span differently indented code blocks
+        # by using the BlockFinder helper used which inspect.getsource() uses itself
+        block_finder = inspect.BlockFinder()
+        # if we start with an indented line, put blockfinder to "started" mode
+        block_finder.started = source.lines[start][0].isspace()
+        it = ((x + "\n") for x in source.lines[start:end])
+        try:
+            for tok in tokenize.generate_tokens(lambda: next(it)):
+                block_finder.tokeneater(*tok)
+        except (inspect.EndOfBlock, IndentationError):
+            end = block_finder.last + start
+        except Exception:
+            pass
+
+    # the end might still point to a comment or empty line, correct it
+    while end:
+        line = source.lines[end - 1].lstrip()
+        if line.startswith("#") or not line:
+            end -= 1
+        else:
+            break
+    return astnode, start, end
diff --git a/contrib/python/pytest/py2/_pytest/_io/__init__.py b/contrib/python/pytest/py2/_pytest/_io/__init__.py
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/_io/__init__.py
diff --git a/contrib/python/pytest/py2/_pytest/_io/saferepr.py b/contrib/python/pytest/py2/_pytest/_io/saferepr.py
new file mode 100644
index 0000000000..9b412dccad
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/_io/saferepr.py
@@ -0,0 +1,83 @@
+# -*- coding: utf-8 -*-
+import pprint
+
+from six.moves import reprlib
+
+
+def _call_and_format_exception(call, x, *args):
+    try:
+        # Try the vanilla repr and make sure that the result is a string
+        return call(x, *args)
+    except Exception as exc:
+        exc_name = type(exc).__name__
+        try:
+            exc_info = str(exc)
+        except Exception:
+            exc_info = "unknown"
+        return '<[%s("%s") raised in repr()] %s object at 0x%x>' % (
+            exc_name,
+            exc_info,
+            x.__class__.__name__,
+            id(x),
+        )
+
+
+class SafeRepr(reprlib.Repr):
+    """subclass of repr.Repr that limits the resulting size of repr()
+    and includes information on exceptions raised during the call.
+    """
+
+    def repr(self, x):
+        return self._callhelper(reprlib.Repr.repr, self, x)
+
+    def repr_unicode(self, x, level):
+        # Strictly speaking wrong on narrow builds
+        def repr(u):
+            if "'" not in u:
+                return u"'%s'" % u
+            elif '"' not in u:
+                return u'"%s"' % u
+            else:
+                return u"'%s'" % u.replace("'", r"\'")
+
+        s = repr(x[: self.maxstring])
+        if len(s) > self.maxstring:
+            i = max(0, (self.maxstring - 3) // 2)
+            j = max(0, self.maxstring - 3 - i)
+            s = repr(x[:i] + x[len(x) - j :])
+            s = s[:i] + "..." + s[len(s) - j :]
+        return s
+
+    def repr_instance(self, x, level):
+        return self._callhelper(repr, x)
+
+    def _callhelper(self, call, x, *args):
+        s = _call_and_format_exception(call, x, *args)
+        if len(s) > self.maxsize:
+            i = max(0, (self.maxsize - 3) // 2)
+            j = max(0, self.maxsize - 3 - i)
+            s = s[:i] + "..." + s[len(s) - j :]
+        return s
+
+
+def safeformat(obj):
+    """return a pretty printed string for the given object.
+    Failing __repr__ functions of user instances will be represented
+    with a short exception info.
+    """
+    return _call_and_format_exception(pprint.pformat, obj)
+
+
+def saferepr(obj, maxsize=240):
+    """return a size-limited safe repr-string for the given object.
+    Failing __repr__ functions of user instances will be represented
+    with a short exception info and 'saferepr' generally takes
+    care to never raise exceptions itself.  This function is a wrapper
+    around the Repr/reprlib functionality of the standard 2.6 lib.
+    """
+    # review exception handling
+    srepr = SafeRepr()
+    srepr.maxstring = maxsize
+    srepr.maxsize = maxsize
+    srepr.maxother = 160
+    return srepr.repr(obj)
diff --git a/contrib/python/pytest/py2/_pytest/_version.py b/contrib/python/pytest/py2/_pytest/_version.py
new file mode 100644
index 0000000000..3d587586fc
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/_version.py
@@ -0,0 +1,4 @@
+# coding: utf-8
+# file generated by setuptools_scm
+# don't change, don't track in version control
+version = '4.6.11'
diff --git a/contrib/python/pytest/py2/_pytest/assertion/__init__.py b/contrib/python/pytest/py2/_pytest/assertion/__init__.py
new file mode 100644
index 0000000000..6b6abb863a
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/assertion/__init__.py
@@ -0,0 +1,156 @@
+# -*- coding: utf-8 -*-
+"""
+support for presenting detailed information in failing assertions.
+"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import sys
+
+import six
+
+from _pytest.assertion import rewrite
+from _pytest.assertion import truncate
+from _pytest.assertion import util
+
+
+def pytest_addoption(parser):
+    group = parser.getgroup("debugconfig")
+    group.addoption(
+        "--assert",
+        action="store",
+        dest="assertmode",
+        choices=("rewrite", "plain"),
+        default="rewrite",
+        metavar="MODE",
+        help="""Control assertion debugging tools.  'plain'
+                            performs no assertion debugging.  'rewrite'
+                            (the default) rewrites assert statements in
+                            test modules on import to provide assert
+                            expression information.""",
+    )
+
+
+def register_assert_rewrite(*names):
+    """Register one or more module names to be rewritten on import.
+
+    This function will make sure that this module or all modules inside
+    the package will get their assert statements rewritten.
+    Thus you should make sure to call this before the module is
+    actually imported, usually in your __init__.py if you are a plugin
+    using a package.
+
+    :raise TypeError: if the given module names are not strings.
+    """
+    for name in names:
+        if not isinstance(name, str):
+            msg = "expected module names as *args, got {0} instead"
+            raise TypeError(msg.format(repr(names)))
+    for hook in sys.meta_path:
+        if isinstance(hook, rewrite.AssertionRewritingHook):
+            importhook = hook
+            break
+    else:
+        importhook = DummyRewriteHook()
+    importhook.mark_rewrite(*names)
+
+
+class DummyRewriteHook(object):
+    """A no-op import hook for when rewriting is disabled."""
+
+    def mark_rewrite(self, *names):
+        pass
+
+
+class AssertionState(object):
+    """State for the assertion plugin."""
+
+    def __init__(self, config, mode):
+        self.mode = mode
+        self.trace = config.trace.root.get("assertion")
+        self.hook = None
+
+
+def install_importhook(config):
+    """Try to install the rewrite hook, raise SystemError if it fails."""
+    # Jython has an AST bug that make the assertion rewriting hook malfunction.
+    if sys.platform.startswith("java"):
+        raise SystemError("rewrite not supported")
+
+    config._assertstate = AssertionState(config, "rewrite")
+    config._assertstate.hook = hook = rewrite.AssertionRewritingHook(config)
+    sys.meta_path.insert(0, hook)
+    config._assertstate.trace("installed rewrite import hook")
+
+    def undo():
+        hook = config._assertstate.hook
+        if hook is not None and hook in sys.meta_path:
+            sys.meta_path.remove(hook)
+
+    config.add_cleanup(undo)
+    return hook
+
+
+def pytest_collection(session):
+    # this hook is only called when test modules are collected
+    # so for example not in the master process of pytest-xdist
+    # (which does not collect test modules)
+    assertstate = getattr(session.config, "_assertstate", None)
+    if assertstate:
+        if assertstate.hook is not None:
+            assertstate.hook.set_session(session)
+
+
+def pytest_runtest_setup(item):
+    """Setup the pytest_assertrepr_compare hook
+
+    The newinterpret and rewrite modules will use util._reprcompare if
+    it exists to use custom reporting via the
+    pytest_assertrepr_compare hook.  This sets up this custom
+    comparison for the test.
+    """
+
+    def callbinrepr(op, left, right):
+        """Call the pytest_assertrepr_compare hook and prepare the result
+
+        This uses the first result from the hook and then ensures the
+        following:
+        * Overly verbose explanations are truncated unless configured otherwise
+          (eg. if running in verbose mode).
+        * Embedded newlines are escaped to help util.format_explanation()
+          later.
+        * If the rewrite mode is used embedded %-characters are replaced
+          to protect later % formatting.
+
+        The result can be formatted by util.format_explanation() for
+        pretty printing.
+        """
+        hook_result = item.ihook.pytest_assertrepr_compare(
+            config=item.config, op=op, left=left, right=right
+        )
+        for new_expl in hook_result:
+            if new_expl:
+                new_expl = truncate.truncate_if_required(new_expl, item)
+                new_expl = [line.replace("\n", "\\n") for line in new_expl]
+                res = six.text_type("\n~").join(new_expl)
+                if item.config.getvalue("assertmode") == "rewrite":
+                    res = res.replace("%", "%%")
+                return res
+
+    util._reprcompare = callbinrepr
+
+
+def pytest_runtest_teardown(item):
+    util._reprcompare = None
+
+
+def pytest_sessionfinish(session):
+    assertstate = getattr(session.config, "_assertstate", None)
+    if assertstate:
+        if assertstate.hook is not None:
+            assertstate.hook.set_session(None)
+
+
+# Expose this plugin's implementation for the pytest_assertrepr_compare hook
+pytest_assertrepr_compare = util.assertrepr_compare
diff --git a/contrib/python/pytest/py2/_pytest/assertion/rewrite.py b/contrib/python/pytest/py2/_pytest/assertion/rewrite.py
new file mode 100644
index 0000000000..6cfd81a32f
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/assertion/rewrite.py
@@ -0,0 +1,1072 @@
+# -*- coding: utf-8 -*-
+"""Rewrite assertion AST to produce nice error messages"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import warnings
+warnings.filterwarnings("ignore", category=DeprecationWarning, module="_pytest.assertion.rewrite")
+
+import ast
+import errno
+import imp
+import itertools
+import marshal
+import os
+import re
+import string
+import struct
+import sys
+import types
+
+import atomicwrites
+import py
+import six
+
+from _pytest._io.saferepr import saferepr
+from _pytest.assertion import util
+from _pytest.assertion.util import (  # noqa: F401
+    format_explanation as _format_explanation,
+)
+from _pytest.compat import spec_from_file_location
+from _pytest.pathlib import fnmatch_ex
+from _pytest.pathlib import PurePath
+
+# pytest caches rewritten pycs in __pycache__.
+if hasattr(imp, "get_tag"):
+    PYTEST_TAG = imp.get_tag() + "-PYTEST"
+else:
+    if hasattr(sys, "pypy_version_info"):
+        impl = "pypy"
+    elif sys.platform == "java":
+        impl = "jython"
+    else:
+        impl = "cpython"
+    ver = sys.version_info
+    PYTEST_TAG = "%s-%s%s-PYTEST" % (impl, ver[0], ver[1])
+    del ver, impl
+
+PYC_EXT = ".py" + (__debug__ and "c" or "o")
+PYC_TAIL = "." + PYTEST_TAG + PYC_EXT
+
+ASCII_IS_DEFAULT_ENCODING = sys.version_info[0] < 3
+
+if sys.version_info >= (3, 5):
+    ast_Call = ast.Call
+else:
+
+    def ast_Call(a, b, c):
+        return ast.Call(a, b, c, None, None)
+
+
+class AssertionRewritingHook(object):
+    """PEP302 Import hook which rewrites asserts."""
+
+    def __init__(self, config):
+        self.config = config
+        try:
+            self.fnpats = config.getini("python_files")
+        except ValueError:
+            self.fnpats = ["test_*.py", "*_test.py"]
+        self.session = None
+        self.modules = {}
+        self._rewritten_names = set()
+        self._must_rewrite = set()
+        # flag to guard against trying to rewrite a pyc file while we are already writing another pyc file,
+        # which might result in infinite recursion (#3506)
+        self._writing_pyc = False
+        self._basenames_to_check_rewrite = {"conftest"}
+        self._marked_for_rewrite_cache = {}
+        self._session_paths_checked = False
+
+    def set_session(self, session):
+        self.session = session
+        self._session_paths_checked = False
+
+    def _imp_find_module(self, name, path=None):
+        """Indirection so we can mock calls to find_module originated from the hook during testing"""
+        return imp.find_module(name, path)
+
+    def find_module(self, name, path=None):
+        if self._writing_pyc:
+            return None
+        state = self.config._assertstate
+        if self._early_rewrite_bailout(name, state):
+            return None
+        state.trace("find_module called for: %s" % name)
+        names = name.rsplit(".", 1)
+        lastname = names[-1]
+        pth = None
+        if path is not None:
+            # Starting with Python 3.3, path is a _NamespacePath(), which
+            # causes problems if not converted to list.
+            path = list(path)
+            if len(path) == 1:
+                pth = path[0]
+        if pth is None:
+            try:
+                fd, fn, desc = self._imp_find_module(lastname, path)
+            except ImportError:
+                return None
+            if fd is not None:
+                fd.close()
+            tp = desc[2]
+            if tp == imp.PY_COMPILED:
+                if hasattr(imp, "source_from_cache"):
+                    try:
+                        fn = imp.source_from_cache(fn)
+                    except ValueError:
+                        # Python 3 doesn't like orphaned but still-importable
+                        # .pyc files.
+                        fn = fn[:-1]
+                else:
+                    fn = fn[:-1]
+            elif tp != imp.PY_SOURCE:
+                # Don't know what this is.
+                return None
+        else:
+            fn = os.path.join(pth, name.rpartition(".")[2] + ".py")
+
+        fn_pypath = py.path.local(fn)
+        if not self._should_rewrite(name, fn_pypath, state):
+            return None
+
+        self._rewritten_names.add(name)
+
+        # The requested module looks like a test file, so rewrite it. This is
+        # the most magical part of the process: load the source, rewrite the
+        # asserts, and load the rewritten source. We also cache the rewritten
+        # module code in a special pyc. We must be aware of the possibility of
+        # concurrent pytest processes rewriting and loading pycs. To avoid
+        # tricky race conditions, we maintain the following invariant: The
+        # cached pyc is always a complete, valid pyc. Operations on it must be
+        # atomic. POSIX's atomic rename comes in handy.
+        write = not sys.dont_write_bytecode
+        cache_dir = os.path.join(fn_pypath.dirname, "__pycache__")
+        if write:
+            try:
+                os.mkdir(cache_dir)
+            except OSError:
+                e = sys.exc_info()[1].errno
+                if e == errno.EEXIST:
+                    # Either the __pycache__ directory already exists (the
+                    # common case) or it's blocked by a non-dir node. In the
+                    # latter case, we'll ignore it in _write_pyc.
+                    pass
+                elif e in [errno.ENOENT, errno.ENOTDIR]:
+                    # One of the path components was not a directory, likely
+                    # because we're in a zip file.
+                    write = False
+                elif e in [errno.EACCES, errno.EROFS, errno.EPERM]:
+                    state.trace("read only directory: %r" % fn_pypath.dirname)
+                    write = False
+                else:
+                    raise
+        cache_name = fn_pypath.basename[:-3] + PYC_TAIL
+        pyc = os.path.join(cache_dir, cache_name)
+        # Notice that even if we're in a read-only directory, I'm going
+        # to check for a cached pyc. This may not be optimal...
+        co = _read_pyc(fn_pypath, pyc, state.trace)
+        if co is None:
+            state.trace("rewriting %r" % (fn,))
+            source_stat, co = _rewrite_test(self.config, fn_pypath)
+            if co is None:
+                # Probably a SyntaxError in the test.
+                return None
+            if write:
+                self._writing_pyc = True
+                try:
+                    _write_pyc(state, co, source_stat, pyc)
+                finally:
+                    self._writing_pyc = False
+        else:
+            state.trace("found cached rewritten pyc for %r" % (fn,))
+        self.modules[name] = co, pyc
+        return self
+
+    def _early_rewrite_bailout(self, name, state):
+        """
+        This is a fast way to get out of rewriting modules. Profiling has
+        shown that the call to imp.find_module (inside of the find_module
+        from this class) is a major slowdown, so, this method tries to
+        filter what we're sure won't be rewritten before getting to it.
+        """
+        if self.session is not None and not self._session_paths_checked:
+            self._session_paths_checked = True
+            for path in self.session._initialpaths:
+                # Make something as c:/projects/my_project/path.py ->
+                #     ['c:', 'projects', 'my_project', 'path.py']
+                parts = str(path).split(os.path.sep)
+                # add 'path' to basenames to be checked.
+                self._basenames_to_check_rewrite.add(os.path.splitext(parts[-1])[0])
+
+        # Note: conftest already by default in _basenames_to_check_rewrite.
+        parts = name.split(".")
+        if parts[-1] in self._basenames_to_check_rewrite:
+            return False
+
+        # For matching the name it must be as if it was a filename.
+        path = PurePath(os.path.sep.join(parts) + ".py")
+
+        for pat in self.fnpats:
+            # if the pattern contains subdirectories ("tests/**.py" for example) we can't bail out based
+            # on the name alone because we need to match against the full path
+            if os.path.dirname(pat):
+                return False
+            if fnmatch_ex(pat, path):
+                return False
+
+        if self._is_marked_for_rewrite(name, state):
+            return False
+
+        state.trace("early skip of rewriting module: %s" % (name,))
+        return True
+
+    def _should_rewrite(self, name, fn_pypath, state):
+        # always rewrite conftest files
+        fn = str(fn_pypath)
+        if fn_pypath.basename == "conftest.py":
+            state.trace("rewriting conftest file: %r" % (fn,))
+            return True
+
+        if self.session is not None:
+            if self.session.isinitpath(fn):
+                state.trace("matched test file (was specified on cmdline): %r" % (fn,))
+                return True
+
+        # modules not passed explicitly on the command line are only
+        # rewritten if they match the naming convention for test files
+        for pat in self.fnpats:
+            if fn_pypath.fnmatch(pat):
+                state.trace("matched test file %r" % (fn,))
+                return True
+
+        return self._is_marked_for_rewrite(name, state)
+
+    def _is_marked_for_rewrite(self, name, state):
+        try:
+            return self._marked_for_rewrite_cache[name]
+        except KeyError:
+            for marked in self._must_rewrite:
+                if name == marked or name.startswith(marked + "."):
+                    state.trace("matched marked file %r (from %r)" % (name, marked))
+                    self._marked_for_rewrite_cache[name] = True
+                    return True
+
+            self._marked_for_rewrite_cache[name] = False
+            return False
+
+    def mark_rewrite(self, *names):
+        """Mark import names as needing to be rewritten.
+
+        The named module or package as well as any nested modules will
+        be rewritten on import.
+        """
+        already_imported = (
+            set(names).intersection(sys.modules).difference(self._rewritten_names)
+        )
+        for name in already_imported:
+            if not AssertionRewriter.is_rewrite_disabled(
+                sys.modules[name].__doc__ or ""
+            ):
+                self._warn_already_imported(name)
+        self._must_rewrite.update(names)
+        self._marked_for_rewrite_cache.clear()
+
+    def _warn_already_imported(self, name):
+        from _pytest.warning_types import PytestAssertRewriteWarning
+        from _pytest.warnings import _issue_warning_captured
+
+        _issue_warning_captured(
+            PytestAssertRewriteWarning(
+                "Module already imported so cannot be rewritten: %s" % name
+            ),
+            self.config.hook,
+            stacklevel=5,
+        )
+
+    def load_module(self, name):
+        co, pyc = self.modules.pop(name)
+        if name in sys.modules:
+            # If there is an existing module object named 'fullname' in
+            # sys.modules, the loader must use that existing module. (Otherwise,
+            # the reload() builtin will not work correctly.)
+            mod = sys.modules[name]
+        else:
+            # I wish I could just call imp.load_compiled here, but __file__ has to
+            # be set properly. In Python 3.2+, this all would be handled correctly
+            # by load_compiled.
+            mod = sys.modules[name] = imp.new_module(name)
+        try:
+            mod.__file__ = co.co_filename
+            # Normally, this attribute is 3.2+.
+            mod.__cached__ = pyc
+            mod.__loader__ = self
+            # Normally, this attribute is 3.4+
+            mod.__spec__ = spec_from_file_location(name, co.co_filename, loader=self)
+            exec(co, mod.__dict__)
+        except:  # noqa
+            if name in sys.modules:
+                del sys.modules[name]
+            raise
+        return sys.modules[name]
+
+    def is_package(self, name):
+        try:
+            fd, fn, desc = self._imp_find_module(name)
+        except ImportError:
+            return False
+        if fd is not None:
+            fd.close()
+        tp = desc[2]
+        return tp == imp.PKG_DIRECTORY
+
+    def get_data(self, pathname):
+        """Optional PEP302 get_data API.
+        """
+        with open(pathname, "rb") as f:
+            return f.read()
+
+
+def _write_pyc(state, co, source_stat, pyc):
+    # Technically, we don't have to have the same pyc format as
+    # (C)Python, since these "pycs" should never be seen by builtin
+    # import. However, there's little reason deviate, and I hope
+    # sometime to be able to use imp.load_compiled to load them. (See
+    # the comment in load_module above.)
+    try:
+        with atomicwrites.atomic_write(pyc, mode="wb", overwrite=True) as fp:
+            fp.write(imp.get_magic())
+            # as of now, bytecode header expects 32-bit numbers for size and mtime (#4903)
+            mtime = int(source_stat.mtime) & 0xFFFFFFFF
+            size = source_stat.size & 0xFFFFFFFF
+            # "<LL" stands for 2 unsigned longs, little-ending
+            fp.write(struct.pack("<LL", mtime, size))
+            fp.write(marshal.dumps(co))
+    except EnvironmentError as e:
+        state.trace("error writing pyc file at %s: errno=%s" % (pyc, e.errno))
+        # we ignore any failure to write the cache file
+        # there are many reasons, permission-denied, __pycache__ being a
+        # file etc.
+        return False
+    return True
+
+
+RN = "\r\n".encode("utf-8")
+N = "\n".encode("utf-8")
+
+cookie_re = re.compile(r"^[ \t\f]*#.*coding[:=][ \t]*[-\w.]+")
+BOM_UTF8 = "\xef\xbb\xbf"
+
+
+def _rewrite_test(config, fn):
+    """Try to read and rewrite *fn* and return the code object."""
+    state = config._assertstate
+    try:
+        stat = fn.stat()
+        source = fn.read("rb")
+    except EnvironmentError:
+        return None, None
+    if ASCII_IS_DEFAULT_ENCODING:
+        # ASCII is the default encoding in Python 2. Without a coding
+        # declaration, Python 2 will complain about any bytes in the file
+        # outside the ASCII range. Sadly, this behavior does not extend to
+        # compile() or ast.parse(), which prefer to interpret the bytes as
+        # latin-1. (At least they properly handle explicit coding cookies.) To
+        # preserve this error behavior, we could force ast.parse() to use ASCII
+        # as the encoding by inserting a coding cookie. Unfortunately, that
+        # messes up line numbers. Thus, we have to check ourselves if anything
+        # is outside the ASCII range in the case no encoding is explicitly
+        # declared. For more context, see issue #269. Yay for Python 3 which
+        # gets this right.
+        end1 = source.find("\n")
+        end2 = source.find("\n", end1 + 1)
+        if (
+            not source.startswith(BOM_UTF8)
+            and cookie_re.match(source[0:end1]) is None
+            and cookie_re.match(source[end1 + 1 : end2]) is None
+        ):
+            if hasattr(state, "_indecode"):
+                # encodings imported us again, so don't rewrite.
+                return None, None
+            state._indecode = True
+            try:
+                try:
+                    source.decode("ascii")
+                except UnicodeDecodeError:
+                    # Let it fail in real import.
+                    return None, None
+            finally:
+                del state._indecode
+    try:
+        tree = ast.parse(source, filename=fn.strpath)
+    except SyntaxError:
+        # Let this pop up again in the real import.
+        state.trace("failed to parse: %r" % (fn,))
+        return None, None
+    rewrite_asserts(tree, fn, config)
+    try:
+        co = compile(tree, fn.strpath, "exec", dont_inherit=True)
+    except SyntaxError:
+        # It's possible that this error is from some bug in the
+        # assertion rewriting, but I don't know of a fast way to tell.
+        state.trace("failed to compile: %r" % (fn,))
+        return None, None
+    return stat, co
+
+
+def _read_pyc(source, pyc, trace=lambda x: None):
+    """Possibly read a pytest pyc containing rewritten code.
+
+    Return rewritten code if successful or None if not.
+    """
+    try:
+        fp = open(pyc, "rb")
+    except IOError:
+        return None
+    with fp:
+        try:
+            mtime = int(source.mtime())
+            size = source.size()
+            data = fp.read(12)
+        except EnvironmentError as e:
+            trace("_read_pyc(%s): EnvironmentError %s" % (source, e))
+            return None
+        # Check for invalid or out of date pyc file.
+        if (
+            len(data) != 12
+            or data[:4] != imp.get_magic()
+            or struct.unpack("<LL", data[4:]) != (mtime & 0xFFFFFFFF, size & 0xFFFFFFFF)
+        ):
+            trace("_read_pyc(%s): invalid or out of date pyc" % source)
+            return None
+        try:
+            co = marshal.load(fp)
+        except Exception as e:
+            trace("_read_pyc(%s): marshal.load error %s" % (source, e))
+            return None
+        if not isinstance(co, types.CodeType):
+            trace("_read_pyc(%s): not a code object" % source)
+            return None
+        return co
+
+
+def rewrite_asserts(mod, module_path=None, config=None):
+    """Rewrite the assert statements in mod."""
+    AssertionRewriter(module_path, config).run(mod)
+
+
+def _saferepr(obj):
+    """Get a safe repr of an object for assertion error messages.
+
+    The assertion formatting (util.format_explanation()) requires
+    newlines to be escaped since they are a special character for it.
+    Normally assertion.util.format_explanation() does this but for a
+    custom repr it is possible to contain one of the special escape
+    sequences, especially '\n{' and '\n}' are likely to be present in
+    JSON reprs.
+
+    """
+    r = saferepr(obj)
+    # only occurs in python2.x, repr must return text in python3+
+    if isinstance(r, bytes):
+        # Represent unprintable bytes as `\x##`
+        r = u"".join(
+            u"\\x{:x}".format(ord(c)) if c not in string.printable else c.decode()
+            for c in r
+        )
+    return r.replace(u"\n", u"\\n")
+
+
+def _format_assertmsg(obj):
+    """Format the custom assertion message given.
+
+    For strings this simply replaces newlines with '\n~' so that
+    util.format_explanation() will preserve them instead of escaping
+    newlines.  For other objects saferepr() is used first.
+
+    """
+    # reprlib appears to have a bug which means that if a string
+    # contains a newline it gets escaped, however if an object has a
+    # .__repr__() which contains newlines it does not get escaped.
+    # However in either case we want to preserve the newline.
+    replaces = [(u"\n", u"\n~"), (u"%", u"%%")]
+    if not isinstance(obj, six.string_types):
+        obj = saferepr(obj)
+        replaces.append((u"\\n", u"\n~"))
+
+    if isinstance(obj, bytes):
+        replaces = [(r1.encode(), r2.encode()) for r1, r2 in replaces]
+
+    for r1, r2 in replaces:
+        obj = obj.replace(r1, r2)
+
+    return obj
+
+
+def _should_repr_global_name(obj):
+    if callable(obj):
+        return False
+
+    try:
+        return not hasattr(obj, "__name__")
+    except Exception:
+        return True
+
+
+def _format_boolop(explanations, is_or):
+    explanation = "(" + (is_or and " or " or " and ").join(explanations) + ")"
+    if isinstance(explanation, six.text_type):
+        return explanation.replace(u"%", u"%%")
+    else:
+        return explanation.replace(b"%", b"%%")
+
+
+def _call_reprcompare(ops, results, expls, each_obj):
+    for i, res, expl in zip(range(len(ops)), results, expls):
+        try:
+            done = not res
+        except Exception:
+            done = True
+        if done:
+            break
+    if util._reprcompare is not None:
+        custom = util._reprcompare(ops[i], each_obj[i], each_obj[i + 1])
+        if custom is not None:
+            return custom
+    return expl
+
+
+unary_map = {ast.Not: "not %s", ast.Invert: "~%s", ast.USub: "-%s", ast.UAdd: "+%s"}
+
+binop_map = {
+    ast.BitOr: "|",
+    ast.BitXor: "^",
+    ast.BitAnd: "&",
+    ast.LShift: "<<",
+    ast.RShift: ">>",
+    ast.Add: "+",
+    ast.Sub: "-",
+    ast.Mult: "*",
+    ast.Div: "/",
+    ast.FloorDiv: "//",
+    ast.Mod: "%%",  # escaped for string formatting
+    ast.Eq: "==",
+    ast.NotEq: "!=",
+    ast.Lt: "<",
+    ast.LtE: "<=",
+    ast.Gt: ">",
+    ast.GtE: ">=",
+    ast.Pow: "**",
+    ast.Is: "is",
+    ast.IsNot: "is not",
+    ast.In: "in",
+    ast.NotIn: "not in",
+}
+# Python 3.5+ compatibility
+try:
+    binop_map[ast.MatMult] = "@"
+except AttributeError:
+    pass
+
+# Python 3.4+ compatibility
+if hasattr(ast, "NameConstant"):
+    _NameConstant = ast.NameConstant
+else:
+
+    def _NameConstant(c):
+        return ast.Name(str(c), ast.Load())
+
+
+def set_location(node, lineno, col_offset):
+    """Set node location information recursively."""
+
+    def _fix(node, lineno, col_offset):
+        if "lineno" in node._attributes:
+            node.lineno = lineno
+        if "col_offset" in node._attributes:
+            node.col_offset = col_offset
+        for child in ast.iter_child_nodes(node):
+            _fix(child, lineno, col_offset)
+
+    _fix(node, lineno, col_offset)
+    return node
+
+
+class AssertionRewriter(ast.NodeVisitor):
+    """Assertion rewriting implementation.
+
+    The main entrypoint is to call .run() with an ast.Module instance,
+    this will then find all the assert statements and rewrite them to
+    provide intermediate values and a detailed assertion error.  See
+    http://pybites.blogspot.be/2011/07/behind-scenes-of-pytests-new-assertion.html
+    for an overview of how this works.
+
+    The entry point here is .run() which will iterate over all the
+    statements in an ast.Module and for each ast.Assert statement it
+    finds call .visit() with it.  Then .visit_Assert() takes over and
+    is responsible for creating new ast statements to replace the
+    original assert statement: it rewrites the test of an assertion
+    to provide intermediate values and replace it with an if statement
+    which raises an assertion error with a detailed explanation in
+    case the expression is false.
+
+    For this .visit_Assert() uses the visitor pattern to visit all the
+    AST nodes of the ast.Assert.test field, each visit call returning
+    an AST node and the corresponding explanation string.  During this
+    state is kept in several instance attributes:
+
+    :statements: All the AST statements which will replace the assert
+       statement.
+
+    :variables: This is populated by .variable() with each variable
+       used by the statements so that they can all be set to None at
+       the end of the statements.
+
+    :variable_counter: Counter to create new unique variables needed
+       by statements.  Variables are created using .variable() and
+       have the form of "@py_assert0".
+
+    :on_failure: The AST statements which will be executed if the
+       assertion test fails.  This is the code which will construct
+       the failure message and raises the AssertionError.
+
+    :explanation_specifiers: A dict filled by .explanation_param()
+       with %-formatting placeholders and their corresponding
+       expressions to use in the building of an assertion message.
+       This is used by .pop_format_context() to build a message.
+
+    :stack: A stack of the explanation_specifiers dicts maintained by
+       .push_format_context() and .pop_format_context() which allows
+       to build another %-formatted string while already building one.
+
+    This state is reset on every new assert statement visited and used
+    by the other visitors.
+
+    """
+
+    def __init__(self, module_path, config):
+        super(AssertionRewriter, self).__init__()
+        self.module_path = module_path
+        self.config = config
+
+    def run(self, mod):
+        """Find all assert statements in *mod* and rewrite them."""
+        if not mod.body:
+            # Nothing to do.
+            return
+        # Insert some special imports at the top of the module but after any
+        # docstrings and __future__ imports.
+        aliases = [
+            ast.alias(six.moves.builtins.__name__, "@py_builtins"),
+            ast.alias("_pytest.assertion.rewrite", "@pytest_ar"),
+        ]
+        doc = getattr(mod, "docstring", None)
+        expect_docstring = doc is None
+        if doc is not None and self.is_rewrite_disabled(doc):
+            return
+        pos = 0
+        lineno = 1
+        for item in mod.body:
+            if (
+                expect_docstring
+                and isinstance(item, ast.Expr)
+                and isinstance(item.value, ast.Str)
+            ):
+                doc = item.value.s
+                if self.is_rewrite_disabled(doc):
+                    return
+                expect_docstring = False
+            elif (
+                not isinstance(item, ast.ImportFrom)
+                or item.level > 0
+                or item.module != "__future__"
+            ):
+                lineno = item.lineno
+                break
+            pos += 1
+        else:
+            lineno = item.lineno
+        imports = [
+            ast.Import([alias], lineno=lineno, col_offset=0) for alias in aliases
+        ]
+        mod.body[pos:pos] = imports
+        # Collect asserts.
+        nodes = [mod]
+        while nodes:
+            node = nodes.pop()
+            for name, field in ast.iter_fields(node):
+                if isinstance(field, list):
+                    new = []
+                    for i, child in enumerate(field):
+                        if isinstance(child, ast.Assert):
+                            # Transform assert.
+                            new.extend(self.visit(child))
+                        else:
+                            new.append(child)
+                            if isinstance(child, ast.AST):
+                                nodes.append(child)
+                    setattr(node, name, new)
+                elif (
+                    isinstance(field, ast.AST)
+                    # Don't recurse into expressions as they can't contain
+                    # asserts.
+                    and not isinstance(field, ast.expr)
+                ):
+                    nodes.append(field)
+
+    @staticmethod
+    def is_rewrite_disabled(docstring):
+        return "PYTEST_DONT_REWRITE" in docstring
+
+    def variable(self):
+        """Get a new variable."""
+        # Use a character invalid in python identifiers to avoid clashing.
+        name = "@py_assert" + str(next(self.variable_counter))
+        self.variables.append(name)
+        return name
+
+    def assign(self, expr):
+        """Give *expr* a name."""
+        name = self.variable()
+        self.statements.append(ast.Assign([ast.Name(name, ast.Store())], expr))
+        return ast.Name(name, ast.Load())
+
+    def display(self, expr):
+        """Call saferepr on the expression."""
+        return self.helper("_saferepr", expr)
+
+    def helper(self, name, *args):
+        """Call a helper in this module."""
+        py_name = ast.Name("@pytest_ar", ast.Load())
+        attr = ast.Attribute(py_name, name, ast.Load())
+        return ast_Call(attr, list(args), [])
+
+    def builtin(self, name):
+        """Return the builtin called *name*."""
+        builtin_name = ast.Name("@py_builtins", ast.Load())
+        return ast.Attribute(builtin_name, name, ast.Load())
+
+    def explanation_param(self, expr):
+        """Return a new named %-formatting placeholder for expr.
+
+        This creates a %-formatting placeholder for expr in the
+        current formatting context, e.g. ``%(py0)s``.  The placeholder
+        and expr are placed in the current format context so that it
+        can be used on the next call to .pop_format_context().
+
+        """
+        specifier = "py" + str(next(self.variable_counter))
+        self.explanation_specifiers[specifier] = expr
+        return "%(" + specifier + ")s"
+
+    def push_format_context(self):
+        """Create a new formatting context.
+
+        The format context is used for when an explanation wants to
+        have a variable value formatted in the assertion message.  In
+        this case the value required can be added using
+        .explanation_param().  Finally .pop_format_context() is used
+        to format a string of %-formatted values as added by
+        .explanation_param().
+
+        """
+        self.explanation_specifiers = {}
+        self.stack.append(self.explanation_specifiers)
+
+    def pop_format_context(self, expl_expr):
+        """Format the %-formatted string with current format context.
+
+        The expl_expr should be an ast.Str instance constructed from
+        the %-placeholders created by .explanation_param().  This will
+        add the required code to format said string to .on_failure and
+        return the ast.Name instance of the formatted string.
+
+        """
+        current = self.stack.pop()
+        if self.stack:
+            self.explanation_specifiers = self.stack[-1]
+        keys = [ast.Str(key) for key in current.keys()]
+        format_dict = ast.Dict(keys, list(current.values()))
+        form = ast.BinOp(expl_expr, ast.Mod(), format_dict)
+        name = "@py_format" + str(next(self.variable_counter))
+        self.on_failure.append(ast.Assign([ast.Name(name, ast.Store())], form))
+        return ast.Name(name, ast.Load())
+
+    def generic_visit(self, node):
+        """Handle expressions we don't have custom code for."""
+        assert isinstance(node, ast.expr)
+        res = self.assign(node)
+        return res, self.explanation_param(self.display(res))
+
+    def visit_Assert(self, assert_):
+        """Return the AST statements to replace the ast.Assert instance.
+
+        This rewrites the test of an assertion to provide
+        intermediate values and replace it with an if statement which
+        raises an assertion error with a detailed explanation in case
+        the expression is false.
+
+        """
+        if isinstance(assert_.test, ast.Tuple) and len(assert_.test.elts) >= 1:
+            from _pytest.warning_types import PytestAssertRewriteWarning
+            import warnings
+
+            warnings.warn_explicit(
+                PytestAssertRewriteWarning(
+                    "assertion is always true, perhaps remove parentheses?"
+                ),
+                category=None,
+                filename=str(self.module_path),
+                lineno=assert_.lineno,
+            )
+
+        self.statements = []
+        self.variables = []
+        self.variable_counter = itertools.count()
+        self.stack = []
+        self.on_failure = []
+        self.push_format_context()
+        # Rewrite assert into a bunch of statements.
+        top_condition, explanation = self.visit(assert_.test)
+        # If in a test module, check if directly asserting None, in order to warn [Issue #3191]
+        if self.module_path is not None:
+            self.statements.append(
+                self.warn_about_none_ast(
+                    top_condition, module_path=self.module_path, lineno=assert_.lineno
+                )
+            )
+        # Create failure message.
+        body = self.on_failure
+        negation = ast.UnaryOp(ast.Not(), top_condition)
+        self.statements.append(ast.If(negation, body, []))
+        if assert_.msg:
+            assertmsg = self.helper("_format_assertmsg", assert_.msg)
+            explanation = "\n>assert " + explanation
+        else:
+            assertmsg = ast.Str("")
+            explanation = "assert " + explanation
+        template = ast.BinOp(assertmsg, ast.Add(), ast.Str(explanation))
+        msg = self.pop_format_context(template)
+        fmt = self.helper("_format_explanation", msg)
+        err_name = ast.Name("AssertionError", ast.Load())
+        exc = ast_Call(err_name, [fmt], [])
+        if sys.version_info[0] >= 3:
+            raise_ = ast.Raise(exc, None)
+        else:
+            raise_ = ast.Raise(exc, None, None)
+        body.append(raise_)
+        # Clear temporary variables by setting them to None.
+        if self.variables:
+            variables = [ast.Name(name, ast.Store()) for name in self.variables]
+            clear = ast.Assign(variables, _NameConstant(None))
+            self.statements.append(clear)
+        # Fix line numbers.
+        for stmt in self.statements:
+            set_location(stmt, assert_.lineno, assert_.col_offset)
+        return self.statements
+
+    def warn_about_none_ast(self, node, module_path, lineno):
+        """
+        Returns an AST issuing a warning if the value of node is `None`.
+        This is used to warn the user when asserting a function that asserts
+        internally already.
+        See issue #3191 for more details.
+        """
+
+        # Using parse because it is different between py2 and py3.
+        AST_NONE = ast.parse("None").body[0].value
+        val_is_none = ast.Compare(node, [ast.Is()], [AST_NONE])
+        send_warning = ast.parse(
+            """
+from _pytest.warning_types import PytestAssertRewriteWarning
+from warnings import warn_explicit
+warn_explicit(
+    PytestAssertRewriteWarning('asserting the value None, please use "assert is None"'),
+    category=None,
+    filename={filename!r},
+    lineno={lineno},
+)
+            """.format(
+                filename=module_path.strpath, lineno=lineno
+            )
+        ).body
+        return ast.If(val_is_none, send_warning, [])
+
+    def visit_Name(self, name):
+        # Display the repr of the name if it's a local variable or
+        # _should_repr_global_name() thinks it's acceptable.
+        locs = ast_Call(self.builtin("locals"), [], [])
+        inlocs = ast.Compare(ast.Str(name.id), [ast.In()], [locs])
+        dorepr = self.helper("_should_repr_global_name", name)
+        test = ast.BoolOp(ast.Or(), [inlocs, dorepr])
+        expr = ast.IfExp(test, self.display(name), ast.Str(name.id))
+        return name, self.explanation_param(expr)
+
+    def visit_BoolOp(self, boolop):
+        res_var = self.variable()
+        expl_list = self.assign(ast.List([], ast.Load()))
+        app = ast.Attribute(expl_list, "append", ast.Load())
+        is_or = int(isinstance(boolop.op, ast.Or))
+        body = save = self.statements
+        fail_save = self.on_failure
+        levels = len(boolop.values) - 1
+        self.push_format_context()
+        # Process each operand, short-circuting if needed.
+        for i, v in enumerate(boolop.values):
+            if i:
+                fail_inner = []
+                # cond is set in a prior loop iteration below
+                self.on_failure.append(ast.If(cond, fail_inner, []))  # noqa
+                self.on_failure = fail_inner
+            self.push_format_context()
+            res, expl = self.visit(v)
+            body.append(ast.Assign([ast.Name(res_var, ast.Store())], res))
+            expl_format = self.pop_format_context(ast.Str(expl))
+            call = ast_Call(app, [expl_format], [])
+            self.on_failure.append(ast.Expr(call))
+            if i < levels:
+                cond = res
+                if is_or:
+                    cond = ast.UnaryOp(ast.Not(), cond)
+                inner = []
+                self.statements.append(ast.If(cond, inner, []))
+                self.statements = body = inner
+        self.statements = save
+        self.on_failure = fail_save
+        expl_template = self.helper("_format_boolop", expl_list, ast.Num(is_or))
+        expl = self.pop_format_context(expl_template)
+        return ast.Name(res_var, ast.Load()), self.explanation_param(expl)
+
+    def visit_UnaryOp(self, unary):
+        pattern = unary_map[unary.op.__class__]
+        operand_res, operand_expl = self.visit(unary.operand)
+        res = self.assign(ast.UnaryOp(unary.op, operand_res))
+        return res, pattern % (operand_expl,)
+
+    def visit_BinOp(self, binop):
+        symbol = binop_map[binop.op.__class__]
+        left_expr, left_expl = self.visit(binop.left)
+        right_expr, right_expl = self.visit(binop.right)
+        explanation = "(%s %s %s)" % (left_expl, symbol, right_expl)
+        res = self.assign(ast.BinOp(left_expr, binop.op, right_expr))
+        return res, explanation
+
+    def visit_Call_35(self, call):
+        """
+        visit `ast.Call` nodes on Python3.5 and after
+        """
+        new_func, func_expl = self.visit(call.func)
+        arg_expls = []
+        new_args = []
+        new_kwargs = []
+        for arg in call.args:
+            res, expl = self.visit(arg)
+            arg_expls.append(expl)
+            new_args.append(res)
+        for keyword in call.keywords:
+            res, expl = self.visit(keyword.value)
+            new_kwargs.append(ast.keyword(keyword.arg, res))
+            if keyword.arg:
+                arg_expls.append(keyword.arg + "=" + expl)
+            else:  # **args have `arg` keywords with an .arg of None
+                arg_expls.append("**" + expl)
+
+        expl = "%s(%s)" % (func_expl, ", ".join(arg_expls))
+        new_call = ast.Call(new_func, new_args, new_kwargs)
+        res = self.assign(new_call)
+        res_expl = self.explanation_param(self.display(res))
+        outer_expl = "%s\n{%s = %s\n}" % (res_expl, res_expl, expl)
+        return res, outer_expl
+
+    def visit_Starred(self, starred):
+        # From Python 3.5, a Starred node can appear in a function call
+        res, expl = self.visit(starred.value)
+        new_starred = ast.Starred(res, starred.ctx)
+        return new_starred, "*" + expl
+
+    def visit_Call_legacy(self, call):
+        """
+        visit `ast.Call nodes on 3.4 and below`
+        """
+        new_func, func_expl = self.visit(call.func)
+        arg_expls = []
+        new_args = []
+        new_kwargs = []
+        new_star = new_kwarg = None
+        for arg in call.args:
+            res, expl = self.visit(arg)
+            new_args.append(res)
+            arg_expls.append(expl)
+        for keyword in call.keywords:
+            res, expl = self.visit(keyword.value)
+            new_kwargs.append(ast.keyword(keyword.arg, res))
+            arg_expls.append(keyword.arg + "=" + expl)
+        if call.starargs:
+            new_star, expl = self.visit(call.starargs)
+            arg_expls.append("*" + expl)
+        if call.kwargs:
+            new_kwarg, expl = self.visit(call.kwargs)
+            arg_expls.append("**" + expl)
+        expl = "%s(%s)" % (func_expl, ", ".join(arg_expls))
+        new_call = ast.Call(new_func, new_args, new_kwargs, new_star, new_kwarg)
+        res = self.assign(new_call)
+        res_expl = self.explanation_param(self.display(res))
+        outer_expl = "%s\n{%s = %s\n}" % (res_expl, res_expl, expl)
+        return res, outer_expl
+
+    # ast.Call signature changed on 3.5,
+    # conditionally change  which methods is named
+    # visit_Call depending on Python version
+    if sys.version_info >= (3, 5):
+        visit_Call = visit_Call_35
+    else:
+        visit_Call = visit_Call_legacy
+
+    def visit_Attribute(self, attr):
+        if not isinstance(attr.ctx, ast.Load):
+            return self.generic_visit(attr)
+        value, value_expl = self.visit(attr.value)
+        res = self.assign(ast.Attribute(value, attr.attr, ast.Load()))
+        res_expl = self.explanation_param(self.display(res))
+        pat = "%s\n{%s = %s.%s\n}"
+        expl = pat % (res_expl, res_expl, value_expl, attr.attr)
+        return res, expl
+
+    def visit_Compare(self, comp):
+        self.push_format_context()
+        left_res, left_expl = self.visit(comp.left)
+        if isinstance(comp.left, (ast.Compare, ast.BoolOp)):
+            left_expl = "({})".format(left_expl)
+        res_variables = [self.variable() for i in range(len(comp.ops))]
+        load_names = [ast.Name(v, ast.Load()) for v in res_variables]
+        store_names = [ast.Name(v, ast.Store()) for v in res_variables]
+        it = zip(range(len(comp.ops)), comp.ops, comp.comparators)
+        expls = []
+        syms = []
+        results = [left_res]
+        for i, op, next_operand in it:
+            next_res, next_expl = self.visit(next_operand)
+            if isinstance(next_operand, (ast.Compare, ast.BoolOp)):
+                next_expl = "({})".format(next_expl)
+            results.append(next_res)
+            sym = binop_map[op.__class__]
+            syms.append(ast.Str(sym))
+            expl = "%s %s %s" % (left_expl, sym, next_expl)
+            expls.append(ast.Str(expl))
+            res_expr = ast.Compare(left_res, [op], [next_res])
+            self.statements.append(ast.Assign([store_names[i]], res_expr))
+            left_res, left_expl = next_res, next_expl
+        # Use pytest.assertion.util._reprcompare if that's available.
+        expl_call = self.helper(
+            "_call_reprcompare",
+            ast.Tuple(syms, ast.Load()),
+            ast.Tuple(load_names, ast.Load()),
+            ast.Tuple(expls, ast.Load()),
+            ast.Tuple(results, ast.Load()),
+        )
+        if len(comp.ops) > 1:
+            res = ast.BoolOp(ast.And(), load_names)
+        else:
+            res = load_names[0]
+        return res, self.explanation_param(self.pop_format_context(expl_call))
diff --git a/contrib/python/pytest/py2/_pytest/assertion/truncate.py b/contrib/python/pytest/py2/_pytest/assertion/truncate.py
new file mode 100644
index 0000000000..525896ea9a
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/assertion/truncate.py
@@ -0,0 +1,102 @@
+# -*- coding: utf-8 -*-
+"""
+Utilities for truncating assertion output.
+
+Current default behaviour is to truncate assertion explanations at
+~8 terminal lines, unless running in "-vv" mode or running on CI.
+"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import os
+
+import six
+
+DEFAULT_MAX_LINES = 8
+DEFAULT_MAX_CHARS = 8 * 80
+USAGE_MSG = "use '-vv' to show"
+
+
+def truncate_if_required(explanation, item, max_length=None):
+    """
+    Truncate this assertion explanation if the given test item is eligible.
+    """
+    if _should_truncate_item(item):
+        return _truncate_explanation(explanation)
+    return explanation
+
+
+def _should_truncate_item(item):
+    """
+    Whether or not this test item is eligible for truncation.
+    """
+    verbose = item.config.option.verbose
+    return verbose < 2 and not _running_on_ci()
+
+
+def _running_on_ci():
+    """Check if we're currently running on a CI system."""
+    env_vars = ["CI", "BUILD_NUMBER"]
+    return any(var in os.environ for var in env_vars)
+
+
+def _truncate_explanation(input_lines, max_lines=None, max_chars=None):
+    """
+    Truncate given list of strings that makes up the assertion explanation.
+
+    Truncates to either 8 lines, or 640 characters - whichever the input reaches
+    first. The remaining lines will be replaced by a usage message.
+    """
+
+    if max_lines is None:
+        max_lines = DEFAULT_MAX_LINES
+    if max_chars is None:
+        max_chars = DEFAULT_MAX_CHARS
+
+    # Check if truncation required
+    input_char_count = len("".join(input_lines))
+    if len(input_lines) <= max_lines and input_char_count <= max_chars:
+        return input_lines
+
+    # Truncate first to max_lines, and then truncate to max_chars if max_chars
+    # is exceeded.
+    truncated_explanation = input_lines[:max_lines]
+    truncated_explanation = _truncate_by_char_count(truncated_explanation, max_chars)
+
+    # Add ellipsis to final line
+    truncated_explanation[-1] = truncated_explanation[-1] + "..."
+
+    # Append useful message to explanation
+    truncated_line_count = len(input_lines) - len(truncated_explanation)
+    truncated_line_count += 1  # Account for the part-truncated final line
+    msg = "...Full output truncated"
+    if truncated_line_count == 1:
+        msg += " ({} line hidden)".format(truncated_line_count)
+    else:
+        msg += " ({} lines hidden)".format(truncated_line_count)
+    msg += ", {}".format(USAGE_MSG)
+    truncated_explanation.extend([six.text_type(""), six.text_type(msg)])
+    return truncated_explanation
+
+
+def _truncate_by_char_count(input_lines, max_chars):
+    # Check if truncation required
+    if len("".join(input_lines)) <= max_chars:
+        return input_lines
+
+    # Find point at which input length exceeds total allowed length
+    iterated_char_count = 0
+    for iterated_index, input_line in enumerate(input_lines):
+        if iterated_char_count + len(input_line) > max_chars:
+            break
+        iterated_char_count += len(input_line)
+
+    # Create truncated explanation with modified final line
+    truncated_result = input_lines[:iterated_index]
+    final_line = input_lines[iterated_index]
+    if final_line:
+        final_line_truncate_point = max_chars - iterated_char_count
+        final_line = final_line[:final_line_truncate_point]
+    truncated_result.append(final_line)
+    return truncated_result
diff --git a/contrib/python/pytest/py2/_pytest/assertion/util.py b/contrib/python/pytest/py2/_pytest/assertion/util.py
new file mode 100644
index 0000000000..c382f1c609
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/assertion/util.py
@@ -0,0 +1,421 @@
+# -*- coding: utf-8 -*-
+"""Utilities for assertion debugging"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import pprint
+
+import six
+
+import _pytest._code
+from ..compat import Sequence
+from _pytest import outcomes
+from _pytest._io.saferepr import saferepr
+from _pytest.compat import ATTRS_EQ_FIELD
+
+# The _reprcompare attribute on the util module is used by the new assertion
+# interpretation code and assertion rewriter to detect this plugin was
+# loaded and in turn call the hooks defined here as part of the
+# DebugInterpreter.
+_reprcompare = None
+
+
+# the re-encoding is needed for python2 repr
+# with non-ascii characters (see issue 877 and 1379)
+def ecu(s):
+    if isinstance(s, bytes):
+        return s.decode("UTF-8", "replace")
+    else:
+        return s
+
+
+def format_explanation(explanation):
+    """This formats an explanation
+
+    Normally all embedded newlines are escaped, however there are
+    three exceptions: \n{, \n} and \n~.  The first two are intended
+    cover nested explanations, see function and attribute explanations
+    for examples (.visit_Call(), visit_Attribute()).  The last one is
+    for when one explanation needs to span multiple lines, e.g. when
+    displaying diffs.
+    """
+    explanation = ecu(explanation)
+    lines = _split_explanation(explanation)
+    result = _format_lines(lines)
+    return u"\n".join(result)
+
+
+def _split_explanation(explanation):
+    """Return a list of individual lines in the explanation
+
+    This will return a list of lines split on '\n{', '\n}' and '\n~'.
+    Any other newlines will be escaped and appear in the line as the
+    literal '\n' characters.
+    """
+    raw_lines = (explanation or u"").split("\n")
+    lines = [raw_lines[0]]
+    for values in raw_lines[1:]:
+        if values and values[0] in ["{", "}", "~", ">"]:
+            lines.append(values)
+        else:
+            lines[-1] += "\\n" + values
+    return lines
+
+
+def _format_lines(lines):
+    """Format the individual lines
+
+    This will replace the '{', '}' and '~' characters of our mini
+    formatting language with the proper 'where ...', 'and ...' and ' +
+    ...' text, taking care of indentation along the way.
+
+    Return a list of formatted lines.
+    """
+    result = lines[:1]
+    stack = [0]
+    stackcnt = [0]
+    for line in lines[1:]:
+        if line.startswith("{"):
+            if stackcnt[-1]:
+                s = u"and   "
+            else:
+                s = u"where "
+            stack.append(len(result))
+            stackcnt[-1] += 1
+            stackcnt.append(0)
+            result.append(u" +" + u"  " * (len(stack) - 1) + s + line[1:])
+        elif line.startswith("}"):
+            stack.pop()
+            stackcnt.pop()
+            result[stack[-1]] += line[1:]
+        else:
+            assert line[0] in ["~", ">"]
+            stack[-1] += 1
+            indent = len(stack) if line.startswith("~") else len(stack) - 1
+            result.append(u"  " * indent + line[1:])
+    assert len(stack) == 1
+    return result
+
+
+# Provide basestring in python3
+try:
+    basestring = basestring
+except NameError:
+    basestring = str
+
+
+def issequence(x):
+    return isinstance(x, Sequence) and not isinstance(x, basestring)
+
+
+def istext(x):
+    return isinstance(x, basestring)
+
+
+def isdict(x):
+    return isinstance(x, dict)
+
+
+def isset(x):
+    return isinstance(x, (set, frozenset))
+
+
+def isdatacls(obj):
+    return getattr(obj, "__dataclass_fields__", None) is not None
+
+
+def isattrs(obj):
+    return getattr(obj, "__attrs_attrs__", None) is not None
+
+
+def isiterable(obj):
+    try:
+        iter(obj)
+        return not istext(obj)
+    except TypeError:
+        return False
+
+
+def assertrepr_compare(config, op, left, right):
+    """Return specialised explanations for some operators/operands"""
+    width = 80 - 15 - len(op) - 2  # 15 chars indentation, 1 space around op
+    left_repr = saferepr(left, maxsize=int(width // 2))
+    right_repr = saferepr(right, maxsize=width - len(left_repr))
+
+    summary = u"%s %s %s" % (ecu(left_repr), op, ecu(right_repr))
+
+    verbose = config.getoption("verbose")
+    explanation = None
+    try:
+        if op == "==":
+            if istext(left) and istext(right):
+                explanation = _diff_text(left, right, verbose)
+            else:
+                if issequence(left) and issequence(right):
+                    explanation = _compare_eq_sequence(left, right, verbose)
+                elif isset(left) and isset(right):
+                    explanation = _compare_eq_set(left, right, verbose)
+                elif isdict(left) and isdict(right):
+                    explanation = _compare_eq_dict(left, right, verbose)
+                elif type(left) == type(right) and (isdatacls(left) or isattrs(left)):
+                    type_fn = (isdatacls, isattrs)
+                    explanation = _compare_eq_cls(left, right, verbose, type_fn)
+                elif verbose > 0:
+                    explanation = _compare_eq_verbose(left, right)
+                if isiterable(left) and isiterable(right):
+                    expl = _compare_eq_iterable(left, right, verbose)
+                    if explanation is not None:
+                        explanation.extend(expl)
+                    else:
+                        explanation = expl
+        elif op == "not in":
+            if istext(left) and istext(right):
+                explanation = _notin_text(left, right, verbose)
+    except outcomes.Exit:
+        raise
+    except Exception:
+        explanation = [
+            u"(pytest_assertion plugin: representation of details failed.  "
+            u"Probably an object has a faulty __repr__.)",
+            six.text_type(_pytest._code.ExceptionInfo.from_current()),
+        ]
+
+    if not explanation:
+        return None
+
+    return [summary] + explanation
+
+
+def _diff_text(left, right, verbose=0):
+    """Return the explanation for the diff between text or bytes.
+
+    Unless --verbose is used this will skip leading and trailing
+    characters which are identical to keep the diff minimal.
+
+    If the input are bytes they will be safely converted to text.
+    """
+    from difflib import ndiff
+
+    explanation = []
+
+    def escape_for_readable_diff(binary_text):
+        """
+        Ensures that the internal string is always valid unicode, converting any bytes safely to valid unicode.
+        This is done using repr() which then needs post-processing to fix the encompassing quotes and un-escape
+        newlines and carriage returns (#429).
+        """
+        r = six.text_type(repr(binary_text)[1:-1])
+        r = r.replace(r"\n", "\n")
+        r = r.replace(r"\r", "\r")
+        return r
+
+    if isinstance(left, bytes):
+        left = escape_for_readable_diff(left)
+    if isinstance(right, bytes):
+        right = escape_for_readable_diff(right)
+    if verbose < 1:
+        i = 0  # just in case left or right has zero length
+        for i in range(min(len(left), len(right))):
+            if left[i] != right[i]:
+                break
+        if i > 42:
+            i -= 10  # Provide some context
+            explanation = [
+                u"Skipping %s identical leading characters in diff, use -v to show" % i
+            ]
+            left = left[i:]
+            right = right[i:]
+        if len(left) == len(right):
+            for i in range(len(left)):
+                if left[-i] != right[-i]:
+                    break
+            if i > 42:
+                i -= 10  # Provide some context
+                explanation += [
+                    u"Skipping {} identical trailing "
+                    u"characters in diff, use -v to show".format(i)
+                ]
+                left = left[:-i]
+                right = right[:-i]
+    keepends = True
+    if left.isspace() or right.isspace():
+        left = repr(str(left))
+        right = repr(str(right))
+        explanation += [u"Strings contain only whitespace, escaping them using repr()"]
+    explanation += [
+        line.strip("\n")
+        for line in ndiff(left.splitlines(keepends), right.splitlines(keepends))
+    ]
+    return explanation
+
+
+def _compare_eq_verbose(left, right):
+    keepends = True
+    left_lines = repr(left).splitlines(keepends)
+    right_lines = repr(right).splitlines(keepends)
+
+    explanation = []
+    explanation += [u"-" + line for line in left_lines]
+    explanation += [u"+" + line for line in right_lines]
+
+    return explanation
+
+
+def _compare_eq_iterable(left, right, verbose=0):
+    if not verbose:
+        return [u"Use -v to get the full diff"]
+    # dynamic import to speedup pytest
+    import difflib
+
+    try:
+        left_formatting = pprint.pformat(left).splitlines()
+        right_formatting = pprint.pformat(right).splitlines()
+        explanation = [u"Full diff:"]
+    except Exception:
+        # hack: PrettyPrinter.pformat() in python 2 fails when formatting items that can't be sorted(), ie, calling
+        # sorted() on a list would raise. See issue #718.
+        # As a workaround, the full diff is generated by using the repr() string of each item of each container.
+        left_formatting = sorted(repr(x) for x in left)
+        right_formatting = sorted(repr(x) for x in right)
+        explanation = [u"Full diff (fallback to calling repr on each item):"]
+    explanation.extend(
+        line.strip() for line in difflib.ndiff(left_formatting, right_formatting)
+    )
+    return explanation
+
+
+def _compare_eq_sequence(left, right, verbose=0):
+    explanation = []
+    len_left = len(left)
+    len_right = len(right)
+    for i in range(min(len_left, len_right)):
+        if left[i] != right[i]:
+            explanation += [u"At index %s diff: %r != %r" % (i, left[i], right[i])]
+            break
+    len_diff = len_left - len_right
+
+    if len_diff:
+        if len_diff > 0:
+            dir_with_more = "Left"
+            extra = saferepr(left[len_right])
+        else:
+            len_diff = 0 - len_diff
+            dir_with_more = "Right"
+            extra = saferepr(right[len_left])
+
+        if len_diff == 1:
+            explanation += [u"%s contains one more item: %s" % (dir_with_more, extra)]
+        else:
+            explanation += [
+                u"%s contains %d more items, first extra item: %s"
+                % (dir_with_more, len_diff, extra)
+            ]
+    return explanation
+
+
+def _compare_eq_set(left, right, verbose=0):
+    explanation = []
+    diff_left = left - right
+    diff_right = right - left
+    if diff_left:
+        explanation.append(u"Extra items in the left set:")
+        for item in diff_left:
+            explanation.append(saferepr(item))
+    if diff_right:
+        explanation.append(u"Extra items in the right set:")
+        for item in diff_right:
+            explanation.append(saferepr(item))
+    return explanation
+
+
+def _compare_eq_dict(left, right, verbose=0):
+    explanation = []
+    set_left = set(left)
+    set_right = set(right)
+    common = set_left.intersection(set_right)
+    same = {k: left[k] for k in common if left[k] == right[k]}
+    if same and verbose < 2:
+        explanation += [u"Omitting %s identical items, use -vv to show" % len(same)]
+    elif same:
+        explanation += [u"Common items:"]
+        explanation += pprint.pformat(same).splitlines()
+    diff = {k for k in common if left[k] != right[k]}
+    if diff:
+        explanation += [u"Differing items:"]
+        for k in diff:
+            explanation += [saferepr({k: left[k]}) + " != " + saferepr({k: right[k]})]
+    extra_left = set_left - set_right
+    len_extra_left = len(extra_left)
+    if len_extra_left:
+        explanation.append(
+            u"Left contains %d more item%s:"
+            % (len_extra_left, "" if len_extra_left == 1 else "s")
+        )
+        explanation.extend(
+            pprint.pformat({k: left[k] for k in extra_left}).splitlines()
+        )
+    extra_right = set_right - set_left
+    len_extra_right = len(extra_right)
+    if len_extra_right:
+        explanation.append(
+            u"Right contains %d more item%s:"
+            % (len_extra_right, "" if len_extra_right == 1 else "s")
+        )
+        explanation.extend(
+            pprint.pformat({k: right[k] for k in extra_right}).splitlines()
+        )
+    return explanation
+
+
+def _compare_eq_cls(left, right, verbose, type_fns):
+    isdatacls, isattrs = type_fns
+    if isdatacls(left):
+        all_fields = left.__dataclass_fields__
+        fields_to_check = [field for field, info in all_fields.items() if info.compare]
+    elif isattrs(left):
+        all_fields = left.__attrs_attrs__
+        fields_to_check = [
+            field.name for field in all_fields if getattr(field, ATTRS_EQ_FIELD)
+        ]
+
+    same = []
+    diff = []
+    for field in fields_to_check:
+        if getattr(left, field) == getattr(right, field):
+            same.append(field)
+        else:
+            diff.append(field)
+
+    explanation = []
+    if same and verbose < 2:
+        explanation.append(u"Omitting %s identical items, use -vv to show" % len(same))
+    elif same:
+        explanation += [u"Matching attributes:"]
+        explanation += pprint.pformat(same).splitlines()
+    if diff:
+        explanation += [u"Differing attributes:"]
+        for field in diff:
+            explanation += [
+                (u"%s: %r != %r") % (field, getattr(left, field), getattr(right, field))
+            ]
+    return explanation
+
+
+def _notin_text(term, text, verbose=0):
+    index = text.find(term)
+    head = text[:index]
+    tail = text[index + len(term) :]
+    correct_text = head + tail
+    diff = _diff_text(correct_text, text, verbose)
+    newdiff = [u"%s is contained here:" % saferepr(term, maxsize=42)]
+    for line in diff:
+        if line.startswith(u"Skipping"):
+            continue
+        if line.startswith(u"- "):
+            continue
+        if line.startswith(u"+ "):
+            newdiff.append(u"  " + line[2:])
+        else:
+            newdiff.append(line)
+    return newdiff
diff --git a/contrib/python/pytest/py2/_pytest/cacheprovider.py b/contrib/python/pytest/py2/_pytest/cacheprovider.py
new file mode 100644
index 0000000000..f5c5545484
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/cacheprovider.py
@@ -0,0 +1,438 @@
+# -*- coding: utf-8 -*-
+"""
+merged implementation of the cache provider
+
+the name cache was not chosen to ensure pluggy automatically
+ignores the external pytest-cache
+"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import json
+import os
+from collections import OrderedDict
+
+import attr
+import py
+import six
+
+import pytest
+from .compat import _PY2 as PY2
+from .pathlib import Path
+from .pathlib import resolve_from_str
+from .pathlib import rm_rf
+
+README_CONTENT = u"""\
+# pytest cache directory #
+
+This directory contains data from the pytest's cache plugin,
+which provides the `--lf` and `--ff` options, as well as the `cache` fixture.
+
+**Do not** commit this to version control.
+
+See [the docs](https://docs.pytest.org/en/latest/cache.html) for more information.
+"""
+
+CACHEDIR_TAG_CONTENT = b"""\
+Signature: 8a477f597d28d172789f06886806bc55
+# This file is a cache directory tag created by pytest.
+# For information about cache directory tags, see:
+#	http://www.bford.info/cachedir/spec.html
+"""
+
+
+@attr.s
+class Cache(object):
+    _cachedir = attr.ib(repr=False)
+    _config = attr.ib(repr=False)
+
+    @classmethod
+    def for_config(cls, config):
+        cachedir = cls.cache_dir_from_config(config)
+        if config.getoption("cacheclear") and cachedir.exists():
+            rm_rf(cachedir)
+            cachedir.mkdir()
+        return cls(cachedir, config)
+
+    @staticmethod
+    def cache_dir_from_config(config):
+        return resolve_from_str(config.getini("cache_dir"), config.rootdir)
+
+    def warn(self, fmt, **args):
+        from _pytest.warnings import _issue_warning_captured
+        from _pytest.warning_types import PytestCacheWarning
+
+        _issue_warning_captured(
+            PytestCacheWarning(fmt.format(**args) if args else fmt),
+            self._config.hook,
+            stacklevel=3,
+        )
+
+    def makedir(self, name):
+        """ return a directory path object with the given name.  If the
+        directory does not yet exist, it will be created.  You can use it
+        to manage files likes e. g. store/retrieve database
+        dumps across test sessions.
+
+        :param name: must be a string not containing a ``/`` separator.
+             Make sure the name contains your plugin or application
+             identifiers to prevent clashes with other cache users.
+        """
+        name = Path(name)
+        if len(name.parts) > 1:
+            raise ValueError("name is not allowed to contain path separators")
+        res = self._cachedir.joinpath("d", name)
+        res.mkdir(exist_ok=True, parents=True)
+        return py.path.local(res)
+
+    def _getvaluepath(self, key):
+        return self._cachedir.joinpath("v", Path(key))
+
+    def get(self, key, default):
+        """ return cached value for the given key.  If no value
+        was yet cached or the value cannot be read, the specified
+        default is returned.
+
+        :param key: must be a ``/`` separated value. Usually the first
+             name is the name of your plugin or your application.
+        :param default: must be provided in case of a cache-miss or
+             invalid cache values.
+
+        """
+        path = self._getvaluepath(key)
+        try:
+            with path.open("r") as f:
+                return json.load(f)
+        except (ValueError, IOError, OSError):
+            return default
+
+    def set(self, key, value):
+        """ save value for the given key.
+
+        :param key: must be a ``/`` separated value. Usually the first
+             name is the name of your plugin or your application.
+        :param value: must be of any combination of basic
+               python types, including nested types
+               like e. g. lists of dictionaries.
+        """
+        path = self._getvaluepath(key)
+        try:
+            if path.parent.is_dir():
+                cache_dir_exists_already = True
+            else:
+                cache_dir_exists_already = self._cachedir.exists()
+                path.parent.mkdir(exist_ok=True, parents=True)
+        except (IOError, OSError):
+            self.warn("could not create cache path {path}", path=path)
+            return
+        if not cache_dir_exists_already:
+            self._ensure_supporting_files()
+        try:
+            f = path.open("wb" if PY2 else "w")
+        except (IOError, OSError):
+            self.warn("cache could not write path {path}", path=path)
+        else:
+            with f:
+                json.dump(value, f, indent=2, sort_keys=True)
+
+    def _ensure_supporting_files(self):
+        """Create supporting files in the cache dir that are not really part of the cache."""
+        readme_path = self._cachedir / "README.md"
+        readme_path.write_text(README_CONTENT)
+
+        gitignore_path = self._cachedir.joinpath(".gitignore")
+        msg = u"# Created by pytest automatically.\n*"
+        gitignore_path.write_text(msg, encoding="UTF-8")
+
+        cachedir_tag_path = self._cachedir.joinpath("CACHEDIR.TAG")
+        cachedir_tag_path.write_bytes(CACHEDIR_TAG_CONTENT)
+
+
+class LFPlugin(object):
+    """ Plugin which implements the --lf (run last-failing) option """
+
+    def __init__(self, config):
+        self.config = config
+        active_keys = "lf", "failedfirst"
+        self.active = any(config.getoption(key) for key in active_keys)
+        self.lastfailed = config.cache.get("cache/lastfailed", {})
+        self._previously_failed_count = None
+        self._report_status = None
+        self._skipped_files = 0  # count skipped files during collection due to --lf
+
+    def last_failed_paths(self):
+        """Returns a set with all Paths()s of the previously failed nodeids (cached).
+        """
+        try:
+            return self._last_failed_paths
+        except AttributeError:
+            rootpath = Path(self.config.rootdir)
+            result = {rootpath / nodeid.split("::")[0] for nodeid in self.lastfailed}
+            result = {x for x in result if x.exists()}
+            self._last_failed_paths = result
+            return result
+
+    def pytest_ignore_collect(self, path):
+        """
+        Ignore this file path if we are in --lf mode and it is not in the list of
+        previously failed files.
+        """
+        if self.active and self.config.getoption("lf") and path.isfile():
+            last_failed_paths = self.last_failed_paths()
+            if last_failed_paths:
+                skip_it = Path(path) not in self.last_failed_paths()
+                if skip_it:
+                    self._skipped_files += 1
+                return skip_it
+
+    def pytest_report_collectionfinish(self):
+        if self.active and self.config.getoption("verbose") >= 0:
+            return "run-last-failure: %s" % self._report_status
+
+    def pytest_runtest_logreport(self, report):
+        if (report.when == "call" and report.passed) or report.skipped:
+            self.lastfailed.pop(report.nodeid, None)
+        elif report.failed:
+            self.lastfailed[report.nodeid] = True
+
+    def pytest_collectreport(self, report):
+        passed = report.outcome in ("passed", "skipped")
+        if passed:
+            if report.nodeid in self.lastfailed:
+                self.lastfailed.pop(report.nodeid)
+                self.lastfailed.update((item.nodeid, True) for item in report.result)
+        else:
+            self.lastfailed[report.nodeid] = True
+
+    def pytest_collection_modifyitems(self, session, config, items):
+        if not self.active:
+            return
+
+        if self.lastfailed:
+            previously_failed = []
+            previously_passed = []
+            for item in items:
+                if item.nodeid in self.lastfailed:
+                    previously_failed.append(item)
+                else:
+                    previously_passed.append(item)
+            self._previously_failed_count = len(previously_failed)
+
+            if not previously_failed:
+                # Running a subset of all tests with recorded failures
+                # only outside of it.
+                self._report_status = "%d known failures not in selected tests" % (
+                    len(self.lastfailed),
+                )
+            else:
+                if self.config.getoption("lf"):
+                    items[:] = previously_failed
+                    config.hook.pytest_deselected(items=previously_passed)
+                else:  # --failedfirst
+                    items[:] = previously_failed + previously_passed
+
+                noun = "failure" if self._previously_failed_count == 1 else "failures"
+                suffix = " first" if self.config.getoption("failedfirst") else ""
+                self._report_status = "rerun previous {count} {noun}{suffix}".format(
+                    count=self._previously_failed_count, suffix=suffix, noun=noun
+                )
+
+            if self._skipped_files > 0:
+                files_noun = "file" if self._skipped_files == 1 else "files"
+                self._report_status += " (skipped {files} {files_noun})".format(
+                    files=self._skipped_files, files_noun=files_noun
+                )
+        else:
+            self._report_status = "no previously failed tests, "
+            if self.config.getoption("last_failed_no_failures") == "none":
+                self._report_status += "deselecting all items."
+                config.hook.pytest_deselected(items=items)
+                items[:] = []
+            else:
+                self._report_status += "not deselecting items."
+
+    def pytest_sessionfinish(self, session):
+        config = self.config
+        if config.getoption("cacheshow") or hasattr(config, "slaveinput"):
+            return
+
+        saved_lastfailed = config.cache.get("cache/lastfailed", {})
+        if saved_lastfailed != self.lastfailed:
+            config.cache.set("cache/lastfailed", self.lastfailed)
+
+
+class NFPlugin(object):
+    """ Plugin which implements the --nf (run new-first) option """
+
+    def __init__(self, config):
+        self.config = config
+        self.active = config.option.newfirst
+        self.cached_nodeids = config.cache.get("cache/nodeids", [])
+
+    def pytest_collection_modifyitems(self, session, config, items):
+        if self.active:
+            new_items = OrderedDict()
+            other_items = OrderedDict()
+            for item in items:
+                if item.nodeid not in self.cached_nodeids:
+                    new_items[item.nodeid] = item
+                else:
+                    other_items[item.nodeid] = item
+
+            items[:] = self._get_increasing_order(
+                six.itervalues(new_items)
+            ) + self._get_increasing_order(six.itervalues(other_items))
+        self.cached_nodeids = [x.nodeid for x in items if isinstance(x, pytest.Item)]
+
+    def _get_increasing_order(self, items):
+        return sorted(items, key=lambda item: item.fspath.mtime(), reverse=True)
+
+    def pytest_sessionfinish(self, session):
+        config = self.config
+        if config.getoption("cacheshow") or hasattr(config, "slaveinput"):
+            return
+
+        config.cache.set("cache/nodeids", self.cached_nodeids)
+
+
+def pytest_addoption(parser):
+    group = parser.getgroup("general")
+    group.addoption(
+        "--lf",
+        "--last-failed",
+        action="store_true",
+        dest="lf",
+        help="rerun only the tests that failed "
+        "at the last run (or all if none failed)",
+    )
+    group.addoption(
+        "--ff",
+        "--failed-first",
+        action="store_true",
+        dest="failedfirst",
+        help="run all tests but run the last failures first.  "
+        "This may re-order tests and thus lead to "
+        "repeated fixture setup/teardown",
+    )
+    group.addoption(
+        "--nf",
+        "--new-first",
+        action="store_true",
+        dest="newfirst",
+        help="run tests from new files first, then the rest of the tests "
+        "sorted by file mtime",
+    )
+    group.addoption(
+        "--cache-show",
+        action="append",
+        nargs="?",
+        dest="cacheshow",
+        help=(
+            "show cache contents, don't perform collection or tests. "
+            "Optional argument: glob (default: '*')."
+        ),
+    )
+    group.addoption(
+        "--cache-clear",
+        action="store_true",
+        dest="cacheclear",
+        help="remove all cache contents at start of test run.",
+    )
+    cache_dir_default = ".pytest_cache"
+    if "TOX_ENV_DIR" in os.environ:
+        cache_dir_default = os.path.join(os.environ["TOX_ENV_DIR"], cache_dir_default)
+    parser.addini("cache_dir", default=cache_dir_default, help="cache directory path.")
+    group.addoption(
+        "--lfnf",
+        "--last-failed-no-failures",
+        action="store",
+        dest="last_failed_no_failures",
+        choices=("all", "none"),
+        default="all",
+        help="which tests to run with no previously (known) failures.",
+    )
+
+
+def pytest_cmdline_main(config):
+    if config.option.cacheshow:
+        from _pytest.main import wrap_session
+
+        return wrap_session(config, cacheshow)
+
+
+@pytest.hookimpl(tryfirst=True)
+def pytest_configure(config):
+    config.cache = Cache.for_config(config)
+    config.pluginmanager.register(LFPlugin(config), "lfplugin")
+    config.pluginmanager.register(NFPlugin(config), "nfplugin")
+
+
+@pytest.fixture
+def cache(request):
+    """
+    Return a cache object that can persist state between testing sessions.
+
+    cache.get(key, default)
+    cache.set(key, value)
+
+    Keys must be a ``/`` separated value, where the first part is usually the
+    name of your plugin or application to avoid clashes with other cache users.
+
+    Values can be any object handled by the json stdlib module.
+    """
+    return request.config.cache
+
+
+def pytest_report_header(config):
+    """Display cachedir with --cache-show and if non-default."""
+    if config.option.verbose > 0 or config.getini("cache_dir") != ".pytest_cache":
+        cachedir = config.cache._cachedir
+        # TODO: evaluate generating upward relative paths
+        # starting with .., ../.. if sensible
+
+        try:
+            displaypath = cachedir.relative_to(config.rootdir)
+        except ValueError:
+            displaypath = cachedir
+        return "cachedir: {}".format(displaypath)
+
+
+def cacheshow(config, session):
+    from pprint import pformat
+
+    tw = py.io.TerminalWriter()
+    tw.line("cachedir: " + str(config.cache._cachedir))
+    if not config.cache._cachedir.is_dir():
+        tw.line("cache is empty")
+        return 0
+
+    glob = config.option.cacheshow[0]
+    if glob is None:
+        glob = "*"
+
+    dummy = object()
+    basedir = config.cache._cachedir
+    vdir = basedir / "v"
+    tw.sep("-", "cache values for %r" % glob)
+    for valpath in sorted(x for x in vdir.rglob(glob) if x.is_file()):
+        key = valpath.relative_to(vdir)
+        val = config.cache.get(key, dummy)
+        if val is dummy:
+            tw.line("%s contains unreadable content, will be ignored" % key)
+        else:
+            tw.line("%s contains:" % key)
+            for line in pformat(val).splitlines():
+                tw.line("  " + line)
+
+    ddir = basedir / "d"
+    if ddir.is_dir():
+        contents = sorted(ddir.rglob(glob))
+        tw.sep("-", "cache directories for %r" % glob)
+        for p in contents:
+            # if p.check(dir=1):
+            #    print("%s/" % p.relto(basedir))
+            if p.is_file():
+                key = p.relative_to(basedir)
+                tw.line("{} is a file of length {:d}".format(key, p.stat().st_size))
+    return 0
diff --git a/contrib/python/pytest/py2/_pytest/capture.py b/contrib/python/pytest/py2/_pytest/capture.py
new file mode 100644
index 0000000000..68c17772f3
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/capture.py
@@ -0,0 +1,850 @@
+# -*- coding: utf-8 -*-
+"""
+per-test stdout/stderr capturing mechanism.
+
+"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import collections
+import contextlib
+import io
+import os
+import sys
+from io import UnsupportedOperation
+from tempfile import TemporaryFile
+
+import six
+
+import pytest
+from _pytest.compat import _PY3
+from _pytest.compat import CaptureIO
+
+patchsysdict = {0: "stdin", 1: "stdout", 2: "stderr"}
+
+
+def pytest_addoption(parser):
+    group = parser.getgroup("general")
+    group._addoption(
+        "--capture",
+        action="store",
+        default="fd" if hasattr(os, "dup") else "sys",
+        metavar="method",
+        choices=["fd", "sys", "no"],
+        help="per-test capturing method: one of fd|sys|no.",
+    )
+    group._addoption(
+        "-s",
+        action="store_const",
+        const="no",
+        dest="capture",
+        help="shortcut for --capture=no.",
+    )
+
+
+@pytest.hookimpl(hookwrapper=True)
+def pytest_load_initial_conftests(early_config, parser, args):
+    ns = early_config.known_args_namespace
+    if ns.capture == "fd":
+        _py36_windowsconsoleio_workaround(sys.stdout)
+    _colorama_workaround()
+    _readline_workaround()
+    pluginmanager = early_config.pluginmanager
+    capman = CaptureManager(ns.capture)
+    pluginmanager.register(capman, "capturemanager")
+
+    # make sure that capturemanager is properly reset at final shutdown
+    early_config.add_cleanup(capman.stop_global_capturing)
+
+    # finally trigger conftest loading but while capturing (issue93)
+    capman.start_global_capturing()
+    outcome = yield
+    capman.suspend_global_capture()
+    if outcome.excinfo is not None:
+        out, err = capman.read_global_capture()
+        sys.stdout.write(out)
+        sys.stderr.write(err)
+
+
+class CaptureManager(object):
+    """
+    Capture plugin, manages that the appropriate capture method is enabled/disabled during collection and each
+    test phase (setup, call, teardown). After each of those points, the captured output is obtained and
+    attached to the collection/runtest report.
+
+    There are two levels of capture:
+    * global: which is enabled by default and can be suppressed by the ``-s`` option. This is always enabled/disabled
+      during collection and each test phase.
+    * fixture: when a test function or one of its fixture depend on the ``capsys`` or ``capfd`` fixtures. In this
+      case special handling is needed to ensure the fixtures take precedence over the global capture.
+    """
+
+    def __init__(self, method):
+        self._method = method
+        self._global_capturing = None
+        self._current_item = None
+
+    def __repr__(self):
+        return "<CaptureManager _method=%r _global_capturing=%r _current_item=%r>" % (
+            self._method,
+            self._global_capturing,
+            self._current_item,
+        )
+
+    def _getcapture(self, method):
+        if method == "fd":
+            return MultiCapture(out=True, err=True, Capture=FDCapture)
+        elif method == "sys":
+            return MultiCapture(out=True, err=True, Capture=SysCapture)
+        elif method == "no":
+            return MultiCapture(out=False, err=False, in_=False)
+        raise ValueError("unknown capturing method: %r" % method)  # pragma: no cover
+
+    def is_capturing(self):
+        if self.is_globally_capturing():
+            return "global"
+        capture_fixture = getattr(self._current_item, "_capture_fixture", None)
+        if capture_fixture is not None:
+            return (
+                "fixture %s" % self._current_item._capture_fixture.request.fixturename
+            )
+        return False
+
+    # Global capturing control
+
+    def is_globally_capturing(self):
+        return self._method != "no"
+
+    def start_global_capturing(self):
+        assert self._global_capturing is None
+        self._global_capturing = self._getcapture(self._method)
+        self._global_capturing.start_capturing()
+
+    def stop_global_capturing(self):
+        if self._global_capturing is not None:
+            self._global_capturing.pop_outerr_to_orig()
+            self._global_capturing.stop_capturing()
+            self._global_capturing = None
+
+    def resume_global_capture(self):
+        # During teardown of the python process, and on rare occasions, capture
+        # attributes can be `None` while trying to resume global capture.
+        if self._global_capturing is not None:
+            self._global_capturing.resume_capturing()
+
+    def suspend_global_capture(self, in_=False):
+        cap = getattr(self, "_global_capturing", None)
+        if cap is not None:
+            cap.suspend_capturing(in_=in_)
+
+    def suspend(self, in_=False):
+        # Need to undo local capsys-et-al if it exists before disabling global capture.
+        self.suspend_fixture(self._current_item)
+        self.suspend_global_capture(in_)
+
+    def resume(self):
+        self.resume_global_capture()
+        self.resume_fixture(self._current_item)
+
+    def read_global_capture(self):
+        return self._global_capturing.readouterr()
+
+    # Fixture Control (it's just forwarding, think about removing this later)
+
+    def activate_fixture(self, item):
+        """If the current item is using ``capsys`` or ``capfd``, activate them so they take precedence over
+        the global capture.
+        """
+        fixture = getattr(item, "_capture_fixture", None)
+        if fixture is not None:
+            fixture._start()
+
+    def deactivate_fixture(self, item):
+        """Deactivates the ``capsys`` or ``capfd`` fixture of this item, if any."""
+        fixture = getattr(item, "_capture_fixture", None)
+        if fixture is not None:
+            fixture.close()
+
+    def suspend_fixture(self, item):
+        fixture = getattr(item, "_capture_fixture", None)
+        if fixture is not None:
+            fixture._suspend()
+
+    def resume_fixture(self, item):
+        fixture = getattr(item, "_capture_fixture", None)
+        if fixture is not None:
+            fixture._resume()
+
+    # Helper context managers
+
+    @contextlib.contextmanager
+    def global_and_fixture_disabled(self):
+        """Context manager to temporarily disable global and current fixture capturing."""
+        self.suspend()
+        try:
+            yield
+        finally:
+            self.resume()
+
+    @contextlib.contextmanager
+    def item_capture(self, when, item):
+        self.resume_global_capture()
+        self.activate_fixture(item)
+        try:
+            yield
+        finally:
+            self.deactivate_fixture(item)
+            self.suspend_global_capture(in_=False)
+
+        out, err = self.read_global_capture()
+        item.add_report_section(when, "stdout", out)
+        item.add_report_section(when, "stderr", err)
+
+    # Hooks
+
+    @pytest.hookimpl(hookwrapper=True)
+    def pytest_make_collect_report(self, collector):
+        if isinstance(collector, pytest.File):
+            self.resume_global_capture()
+            outcome = yield
+            self.suspend_global_capture()
+            out, err = self.read_global_capture()
+            rep = outcome.get_result()
+            if out:
+                rep.sections.append(("Captured stdout", out))
+            if err:
+                rep.sections.append(("Captured stderr", err))
+        else:
+            yield
+
+    @pytest.hookimpl(hookwrapper=True)
+    def pytest_runtest_protocol(self, item):
+        self._current_item = item
+        yield
+        self._current_item = None
+
+    @pytest.hookimpl(hookwrapper=True)
+    def pytest_runtest_setup(self, item):
+        with self.item_capture("setup", item):
+            yield
+
+    @pytest.hookimpl(hookwrapper=True)
+    def pytest_runtest_call(self, item):
+        with self.item_capture("call", item):
+            yield
+
+    @pytest.hookimpl(hookwrapper=True)
+    def pytest_runtest_teardown(self, item):
+        with self.item_capture("teardown", item):
+            yield
+
+    @pytest.hookimpl(tryfirst=True)
+    def pytest_keyboard_interrupt(self, excinfo):
+        self.stop_global_capturing()
+
+    @pytest.hookimpl(tryfirst=True)
+    def pytest_internalerror(self, excinfo):
+        self.stop_global_capturing()
+
+
+capture_fixtures = {"capfd", "capfdbinary", "capsys", "capsysbinary"}
+
+
+def _ensure_only_one_capture_fixture(request, name):
+    fixtures = set(request.fixturenames) & capture_fixtures - {name}
+    if fixtures:
+        fixtures = sorted(fixtures)
+        fixtures = fixtures[0] if len(fixtures) == 1 else fixtures
+        raise request.raiseerror(
+            "cannot use {} and {} at the same time".format(fixtures, name)
+        )
+
+
+@pytest.fixture
+def capsys(request):
+    """Enable text capturing of writes to ``sys.stdout`` and ``sys.stderr``.
+
+    The captured output is made available via ``capsys.readouterr()`` method
+    calls, which return a ``(out, err)`` namedtuple.
+    ``out`` and ``err`` will be ``text`` objects.
+    """
+    _ensure_only_one_capture_fixture(request, "capsys")
+    with _install_capture_fixture_on_item(request, SysCapture) as fixture:
+        yield fixture
+
+
+@pytest.fixture
+def capsysbinary(request):
+    """Enable bytes capturing of writes to ``sys.stdout`` and ``sys.stderr``.
+
+    The captured output is made available via ``capsysbinary.readouterr()``
+    method calls, which return a ``(out, err)`` namedtuple.
+    ``out`` and ``err`` will be ``bytes`` objects.
+    """
+    _ensure_only_one_capture_fixture(request, "capsysbinary")
+    # Currently, the implementation uses the python3 specific `.buffer`
+    # property of CaptureIO.
+    if sys.version_info < (3,):
+        raise request.raiseerror("capsysbinary is only supported on Python 3")
+    with _install_capture_fixture_on_item(request, SysCaptureBinary) as fixture:
+        yield fixture
+
+
+@pytest.fixture
+def capfd(request):
+    """Enable text capturing of writes to file descriptors ``1`` and ``2``.
+
+    The captured output is made available via ``capfd.readouterr()`` method
+    calls, which return a ``(out, err)`` namedtuple.
+    ``out`` and ``err`` will be ``text`` objects.
+    """
+    _ensure_only_one_capture_fixture(request, "capfd")
+    if not hasattr(os, "dup"):
+        pytest.skip(
+            "capfd fixture needs os.dup function which is not available in this system"
+        )
+    with _install_capture_fixture_on_item(request, FDCapture) as fixture:
+        yield fixture
+
+
+@pytest.fixture
+def capfdbinary(request):
+    """Enable bytes capturing of writes to file descriptors ``1`` and ``2``.
+
+    The captured output is made available via ``capfd.readouterr()`` method
+    calls, which return a ``(out, err)`` namedtuple.
+    ``out`` and ``err`` will be ``byte`` objects.
+    """
+    _ensure_only_one_capture_fixture(request, "capfdbinary")
+    if not hasattr(os, "dup"):
+        pytest.skip(
+            "capfdbinary fixture needs os.dup function which is not available in this system"
+        )
+    with _install_capture_fixture_on_item(request, FDCaptureBinary) as fixture:
+        yield fixture
+
+
+@contextlib.contextmanager
+def _install_capture_fixture_on_item(request, capture_class):
+    """
+    Context manager which creates a ``CaptureFixture`` instance and "installs" it on
+    the item/node of the given request. Used by ``capsys`` and ``capfd``.
+
+    The CaptureFixture is added as attribute of the item because it needs to accessed
+    by ``CaptureManager`` during its ``pytest_runtest_*`` hooks.
+    """
+    request.node._capture_fixture = fixture = CaptureFixture(capture_class, request)
+    capmanager = request.config.pluginmanager.getplugin("capturemanager")
+    # Need to active this fixture right away in case it is being used by another fixture (setup phase).
+    # If this fixture is being used only by a test function (call phase), then we wouldn't need this
+    # activation, but it doesn't hurt.
+    capmanager.activate_fixture(request.node)
+    yield fixture
+    fixture.close()
+    del request.node._capture_fixture
+
+
+class CaptureFixture(object):
+    """
+    Object returned by :py:func:`capsys`, :py:func:`capsysbinary`, :py:func:`capfd` and :py:func:`capfdbinary`
+    fixtures.
+    """
+
+    def __init__(self, captureclass, request):
+        self.captureclass = captureclass
+        self.request = request
+        self._capture = None
+        self._captured_out = self.captureclass.EMPTY_BUFFER
+        self._captured_err = self.captureclass.EMPTY_BUFFER
+
+    def _start(self):
+        if self._capture is None:
+            self._capture = MultiCapture(
+                out=True, err=True, in_=False, Capture=self.captureclass
+            )
+            self._capture.start_capturing()
+
+    def close(self):
+        if self._capture is not None:
+            out, err = self._capture.pop_outerr_to_orig()
+            self._captured_out += out
+            self._captured_err += err
+            self._capture.stop_capturing()
+            self._capture = None
+
+    def readouterr(self):
+        """Read and return the captured output so far, resetting the internal buffer.
+
+        :return: captured content as a namedtuple with ``out`` and ``err`` string attributes
+        """
+        captured_out, captured_err = self._captured_out, self._captured_err
+        if self._capture is not None:
+            out, err = self._capture.readouterr()
+            captured_out += out
+            captured_err += err
+        self._captured_out = self.captureclass.EMPTY_BUFFER
+        self._captured_err = self.captureclass.EMPTY_BUFFER
+        return CaptureResult(captured_out, captured_err)
+
+    def _suspend(self):
+        """Suspends this fixture's own capturing temporarily."""
+        if self._capture is not None:
+            self._capture.suspend_capturing()
+
+    def _resume(self):
+        """Resumes this fixture's own capturing temporarily."""
+        if self._capture is not None:
+            self._capture.resume_capturing()
+
+    @contextlib.contextmanager
+    def disabled(self):
+        """Temporarily disables capture while inside the 'with' block."""
+        capmanager = self.request.config.pluginmanager.getplugin("capturemanager")
+        with capmanager.global_and_fixture_disabled():
+            yield
+
+
+def safe_text_dupfile(f, mode, default_encoding="UTF8"):
+    """ return an open text file object that's a duplicate of f on the
+        FD-level if possible.
+    """
+    encoding = getattr(f, "encoding", None)
+    try:
+        fd = f.fileno()
+    except Exception:
+        if "b" not in getattr(f, "mode", "") and hasattr(f, "encoding"):
+            # we seem to have a text stream, let's just use it
+            return f
+    else:
+        newfd = os.dup(fd)
+        if "b" not in mode:
+            mode += "b"
+        f = os.fdopen(newfd, mode, 0)  # no buffering
+    return EncodedFile(f, encoding or default_encoding)
+
+
+class EncodedFile(object):
+    errors = "strict"  # possibly needed by py3 code (issue555)
+
+    def __init__(self, buffer, encoding):
+        self.buffer = buffer
+        self.encoding = encoding
+
+    def write(self, obj):
+        if isinstance(obj, six.text_type):
+            obj = obj.encode(self.encoding, "replace")
+        elif _PY3:
+            raise TypeError(
+                "write() argument must be str, not {}".format(type(obj).__name__)
+            )
+        self.buffer.write(obj)
+
+    def writelines(self, linelist):
+        data = "".join(linelist)
+        self.write(data)
+
+    @property
+    def name(self):
+        """Ensure that file.name is a string."""
+        return repr(self.buffer)
+
+    @property
+    def mode(self):
+        return self.buffer.mode.replace("b", "")
+
+    def __getattr__(self, name):
+        return getattr(object.__getattribute__(self, "buffer"), name)
+
+
+CaptureResult = collections.namedtuple("CaptureResult", ["out", "err"])
+
+
+class MultiCapture(object):
+    out = err = in_ = None
+    _state = None
+
+    def __init__(self, out=True, err=True, in_=True, Capture=None):
+        if in_:
+            self.in_ = Capture(0)
+        if out:
+            self.out = Capture(1)
+        if err:
+            self.err = Capture(2)
+
+    def __repr__(self):
+        return "<MultiCapture out=%r err=%r in_=%r _state=%r _in_suspended=%r>" % (
+            self.out,
+            self.err,
+            self.in_,
+            self._state,
+            getattr(self, "_in_suspended", "<UNSET>"),
+        )
+
+    def start_capturing(self):
+        self._state = "started"
+        if self.in_:
+            self.in_.start()
+        if self.out:
+            self.out.start()
+        if self.err:
+            self.err.start()
+
+    def pop_outerr_to_orig(self):
+        """ pop current snapshot out/err capture and flush to orig streams. """
+        out, err = self.readouterr()
+        if out:
+            self.out.writeorg(out)
+        if err:
+            self.err.writeorg(err)
+        return out, err
+
+    def suspend_capturing(self, in_=False):
+        self._state = "suspended"
+        if self.out:
+            self.out.suspend()
+        if self.err:
+            self.err.suspend()
+        if in_ and self.in_:
+            self.in_.suspend()
+            self._in_suspended = True
+
+    def resume_capturing(self):
+        self._state = "resumed"
+        if self.out:
+            self.out.resume()
+        if self.err:
+            self.err.resume()
+        if hasattr(self, "_in_suspended"):
+            self.in_.resume()
+            del self._in_suspended
+
+    def stop_capturing(self):
+        """ stop capturing and reset capturing streams """
+        if self._state == "stopped":
+            raise ValueError("was already stopped")
+        self._state = "stopped"
+        if self.out:
+            self.out.done()
+        if self.err:
+            self.err.done()
+        if self.in_:
+            self.in_.done()
+
+    def readouterr(self):
+        """ return snapshot unicode value of stdout/stderr capturings. """
+        return CaptureResult(
+            self.out.snap() if self.out is not None else "",
+            self.err.snap() if self.err is not None else "",
+        )
+
+
+class NoCapture(object):
+    EMPTY_BUFFER = None
+    __init__ = start = done = suspend = resume = lambda *args: None
+
+
+class FDCaptureBinary(object):
+    """Capture IO to/from a given os-level filedescriptor.
+
+    snap() produces `bytes`
+    """
+
+    EMPTY_BUFFER = b""
+    _state = None
+
+    def __init__(self, targetfd, tmpfile=None):
+        self.targetfd = targetfd
+        try:
+            self.targetfd_save = os.dup(self.targetfd)
+        except OSError:
+            self.start = lambda: None
+            self.done = lambda: None
+        else:
+            if targetfd == 0:
+                assert not tmpfile, "cannot set tmpfile with stdin"
+                tmpfile = open(os.devnull, "r")
+                self.syscapture = SysCapture(targetfd)
+            else:
+                if tmpfile is None:
+                    f = TemporaryFile()
+                    with f:
+                        tmpfile = safe_text_dupfile(f, mode="wb+")
+                if targetfd in patchsysdict:
+                    self.syscapture = SysCapture(targetfd, tmpfile)
+                else:
+                    self.syscapture = NoCapture()
+            self.tmpfile = tmpfile
+            self.tmpfile_fd = tmpfile.fileno()
+
+    def __repr__(self):
+        return "<FDCapture %s oldfd=%s _state=%r>" % (
+            self.targetfd,
+            getattr(self, "targetfd_save", None),
+            self._state,
+        )
+
+    def start(self):
+        """ Start capturing on targetfd using memorized tmpfile. """
+        try:
+            os.fstat(self.targetfd_save)
+        except (AttributeError, OSError):
+            raise ValueError("saved filedescriptor not valid anymore")
+        os.dup2(self.tmpfile_fd, self.targetfd)
+        self.syscapture.start()
+        self._state = "started"
+
+    def snap(self):
+        self.tmpfile.seek(0)
+        res = self.tmpfile.read()
+        self.tmpfile.seek(0)
+        self.tmpfile.truncate()
+        return res
+
+    def done(self):
+        """ stop capturing, restore streams, return original capture file,
+        seeked to position zero. """
+        targetfd_save = self.__dict__.pop("targetfd_save")
+        os.dup2(targetfd_save, self.targetfd)
+        os.close(targetfd_save)
+        self.syscapture.done()
+        _attempt_to_close_capture_file(self.tmpfile)
+        self._state = "done"
+
+    def suspend(self):
+        self.syscapture.suspend()
+        os.dup2(self.targetfd_save, self.targetfd)
+        self._state = "suspended"
+
+    def resume(self):
+        self.syscapture.resume()
+        os.dup2(self.tmpfile_fd, self.targetfd)
+        self._state = "resumed"
+
+    def writeorg(self, data):
+        """ write to original file descriptor. """
+        if isinstance(data, six.text_type):
+            data = data.encode("utf8")  # XXX use encoding of original stream
+        os.write(self.targetfd_save, data)
+
+
+class FDCapture(FDCaptureBinary):
+    """Capture IO to/from a given os-level filedescriptor.
+
+    snap() produces text
+    """
+
+    EMPTY_BUFFER = str()
+
+    def snap(self):
+        res = super(FDCapture, self).snap()
+        enc = getattr(self.tmpfile, "encoding", None)
+        if enc and isinstance(res, bytes):
+            res = six.text_type(res, enc, "replace")
+        return res
+
+
+class SysCapture(object):
+
+    EMPTY_BUFFER = str()
+    _state = None
+
+    def __init__(self, fd, tmpfile=None):
+        name = patchsysdict[fd]
+        self._old = getattr(sys, name)
+        self.name = name
+        if tmpfile is None:
+            if name == "stdin":
+                tmpfile = DontReadFromInput()
+            else:
+                tmpfile = CaptureIO()
+        self.tmpfile = tmpfile
+
+    def __repr__(self):
+        return "<SysCapture %s _old=%r, tmpfile=%r _state=%r>" % (
+            self.name,
+            self._old,
+            self.tmpfile,
+            self._state,
+        )
+
+    def start(self):
+        setattr(sys, self.name, self.tmpfile)
+        self._state = "started"
+
+    def snap(self):
+        res = self.tmpfile.getvalue()
+        self.tmpfile.seek(0)
+        self.tmpfile.truncate()
+        return res
+
+    def done(self):
+        setattr(sys, self.name, self._old)
+        del self._old
+        _attempt_to_close_capture_file(self.tmpfile)
+        self._state = "done"
+
+    def suspend(self):
+        setattr(sys, self.name, self._old)
+        self._state = "suspended"
+
+    def resume(self):
+        setattr(sys, self.name, self.tmpfile)
+        self._state = "resumed"
+
+    def writeorg(self, data):
+        self._old.write(data)
+        self._old.flush()
+
+
+class SysCaptureBinary(SysCapture):
+    EMPTY_BUFFER = b""
+
+    def snap(self):
+        res = self.tmpfile.buffer.getvalue()
+        self.tmpfile.seek(0)
+        self.tmpfile.truncate()
+        return res
+
+
+class DontReadFromInput(six.Iterator):
+    """Temporary stub class.  Ideally when stdin is accessed, the
+    capturing should be turned off, with possibly all data captured
+    so far sent to the screen.  This should be configurable, though,
+    because in automated test runs it is better to crash than
+    hang indefinitely.
+    """
+
+    encoding = None
+
+    def read(self, *args):
+        raise IOError("reading from stdin while output is captured")
+
+    readline = read
+    readlines = read
+    __next__ = read
+
+    def __iter__(self):
+        return self
+
+    def fileno(self):
+        raise UnsupportedOperation("redirected stdin is pseudofile, has no fileno()")
+
+    def isatty(self):
+        return False
+
+    def close(self):
+        pass
+
+    @property
+    def buffer(self):
+        if sys.version_info >= (3, 0):
+            return self
+        else:
+            raise AttributeError("redirected stdin has no attribute buffer")
+
+
+def _colorama_workaround():
+    """
+    Ensure colorama is imported so that it attaches to the correct stdio
+    handles on Windows.
+
+    colorama uses the terminal on import time. So if something does the
+    first import of colorama while I/O capture is active, colorama will
+    fail in various ways.
+    """
+    if sys.platform.startswith("win32"):
+        try:
+            import colorama  # noqa: F401
+        except ImportError:
+            pass
+
+
+def _readline_workaround():
+    """
+    Ensure readline is imported so that it attaches to the correct stdio
+    handles on Windows.
+
+    Pdb uses readline support where available--when not running from the Python
+    prompt, the readline module is not imported until running the pdb REPL.  If
+    running pytest with the --pdb option this means the readline module is not
+    imported until after I/O capture has been started.
+
+    This is a problem for pyreadline, which is often used to implement readline
+    support on Windows, as it does not attach to the correct handles for stdout
+    and/or stdin if they have been redirected by the FDCapture mechanism.  This
+    workaround ensures that readline is imported before I/O capture is setup so
+    that it can attach to the actual stdin/out for the console.
+
+    See https://github.com/pytest-dev/pytest/pull/1281
+    """
+    if sys.platform.startswith("win32"):
+        try:
+            import readline  # noqa: F401
+        except ImportError:
+            pass
+
+
+def _py36_windowsconsoleio_workaround(stream):
+    """
+    Python 3.6 implemented unicode console handling for Windows. This works
+    by reading/writing to the raw console handle using
+    ``{Read,Write}ConsoleW``.
+
+    The problem is that we are going to ``dup2`` over the stdio file
+    descriptors when doing ``FDCapture`` and this will ``CloseHandle`` the
+    handles used by Python to write to the console. Though there is still some
+    weirdness and the console handle seems to only be closed randomly and not
+    on the first call to ``CloseHandle``, or maybe it gets reopened with the
+    same handle value when we suspend capturing.
+
+    The workaround in this case will reopen stdio with a different fd which
+    also means a different handle by replicating the logic in
+    "Py_lifecycle.c:initstdio/create_stdio".
+
+    :param stream: in practice ``sys.stdout`` or ``sys.stderr``, but given
+        here as parameter for unittesting purposes.
+
+    See https://github.com/pytest-dev/py/issues/103
+    """
+    if not sys.platform.startswith("win32") or sys.version_info[:2] < (3, 6):
+        return
+
+    # bail out if ``stream`` doesn't seem like a proper ``io`` stream (#2666)
+    if not hasattr(stream, "buffer"):
+        return
+
+    buffered = hasattr(stream.buffer, "raw")
+    raw_stdout = stream.buffer.raw if buffered else stream.buffer
+
+    if not isinstance(raw_stdout, io._WindowsConsoleIO):
+        return
+
+    def _reopen_stdio(f, mode):
+        if not buffered and mode[0] == "w":
+            buffering = 0
+        else:
+            buffering = -1
+
+        return io.TextIOWrapper(
+            open(os.dup(f.fileno()), mode, buffering),
+            f.encoding,
+            f.errors,
+            f.newlines,
+            f.line_buffering,
+        )
+
+    sys.stdin = _reopen_stdio(sys.stdin, "rb")
+    sys.stdout = _reopen_stdio(sys.stdout, "wb")
+    sys.stderr = _reopen_stdio(sys.stderr, "wb")
+
+
+def _attempt_to_close_capture_file(f):
+    """Suppress IOError when closing the temporary file used for capturing streams in py27 (#2370)"""
+    if six.PY2:
+        try:
+            f.close()
+        except IOError:
+            pass
+    else:
+        f.close()
diff --git a/contrib/python/pytest/py2/_pytest/compat.py b/contrib/python/pytest/py2/_pytest/compat.py
new file mode 100644
index 0000000000..e5c3b84667
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/compat.py
@@ -0,0 +1,473 @@
+# -*- coding: utf-8 -*-
+"""
+python version compatibility code
+"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import codecs
+import functools
+import inspect
+import re
+import sys
+from contextlib import contextmanager
+
+import attr
+import py
+import six
+from six import text_type
+
+import _pytest
+from _pytest._io.saferepr import saferepr
+from _pytest.outcomes import fail
+from _pytest.outcomes import TEST_OUTCOME
+
+try:
+    import enum
+except ImportError:  # pragma: no cover
+    # Only available in Python 3.4+ or as a backport
+    enum = None
+
+_PY3 = sys.version_info > (3, 0)
+_PY2 = not _PY3
+
+
+if _PY3:
+    from inspect import signature, Parameter as Parameter
+else:
+    from funcsigs import signature, Parameter as Parameter
+
+NOTSET = object()
+
+PY35 = sys.version_info[:2] >= (3, 5)
+PY36 = sys.version_info[:2] >= (3, 6)
+MODULE_NOT_FOUND_ERROR = "ModuleNotFoundError" if PY36 else "ImportError"
+
+
+if _PY3:
+    from collections.abc import MutableMapping as MappingMixin
+    from collections.abc import Iterable, Mapping, Sequence, Sized
+else:
+    # those raise DeprecationWarnings in Python >=3.7
+    from collections import MutableMapping as MappingMixin  # noqa
+    from collections import Iterable, Mapping, Sequence, Sized  # noqa
+
+
+if sys.version_info >= (3, 4):
+    from importlib.util import spec_from_file_location
+else:
+
+    def spec_from_file_location(*_, **__):
+        return None
+
+
+if sys.version_info >= (3, 8):
+    from importlib import metadata as importlib_metadata  # noqa
+else:
+    import importlib_metadata  # noqa
+
+
+def _format_args(func):
+    return str(signature(func))
+
+
+isfunction = inspect.isfunction
+isclass = inspect.isclass
+# used to work around a python2 exception info leak
+exc_clear = getattr(sys, "exc_clear", lambda: None)
+# The type of re.compile objects is not exposed in Python.
+REGEX_TYPE = type(re.compile(""))
+
+
+def is_generator(func):
+    genfunc = inspect.isgeneratorfunction(func)
+    return genfunc and not iscoroutinefunction(func)
+
+
+def iscoroutinefunction(func):
+    """Return True if func is a decorated coroutine function.
+
+    Note: copied and modified from Python 3.5's builtin couroutines.py to avoid import asyncio directly,
+    which in turns also initializes the "logging" module as side-effect (see issue #8).
+    """
+    return getattr(func, "_is_coroutine", False) or (
+        hasattr(inspect, "iscoroutinefunction") and inspect.iscoroutinefunction(func)
+    )
+
+
+def getlocation(function, curdir):
+    function = get_real_func(function)
+    fn = py.path.local(inspect.getfile(function))
+    lineno = function.__code__.co_firstlineno
+    if fn.relto(curdir):
+        fn = fn.relto(curdir)
+    return "%s:%d" % (fn, lineno + 1)
+
+
+def num_mock_patch_args(function):
+    """ return number of arguments used up by mock arguments (if any) """
+    patchings = getattr(function, "patchings", None)
+    if not patchings:
+        return 0
+    mock_modules = [sys.modules.get("mock"), sys.modules.get("unittest.mock")]
+    if any(mock_modules):
+        sentinels = [m.DEFAULT for m in mock_modules if m is not None]
+        return len(
+            [p for p in patchings if not p.attribute_name and p.new in sentinels]
+        )
+    return len(patchings)
+
+
+def getfuncargnames(function, is_method=False, cls=None):
+    """Returns the names of a function's mandatory arguments.
+
+    This should return the names of all function arguments that:
+        * Aren't bound to an instance or type as in instance or class methods.
+        * Don't have default values.
+        * Aren't bound with functools.partial.
+        * Aren't replaced with mocks.
+
+    The is_method and cls arguments indicate that the function should
+    be treated as a bound method even though it's not unless, only in
+    the case of cls, the function is a static method.
+
+    @RonnyPfannschmidt: This function should be refactored when we
+    revisit fixtures. The fixture mechanism should ask the node for
+    the fixture names, and not try to obtain directly from the
+    function object well after collection has occurred.
+
+    """
+    # The parameters attribute of a Signature object contains an
+    # ordered mapping of parameter names to Parameter instances.  This
+    # creates a tuple of the names of the parameters that don't have
+    # defaults.
+    try:
+        parameters = signature(function).parameters
+    except (ValueError, TypeError) as e:
+        fail(
+            "Could not determine arguments of {!r}: {}".format(function, e),
+            pytrace=False,
+        )
+
+    arg_names = tuple(
+        p.name
+        for p in parameters.values()
+        if (
+            p.kind is Parameter.POSITIONAL_OR_KEYWORD
+            or p.kind is Parameter.KEYWORD_ONLY
+        )
+        and p.default is Parameter.empty
+    )
+    # If this function should be treated as a bound method even though
+    # it's passed as an unbound method or function, remove the first
+    # parameter name.
+    if is_method or (
+        cls and not isinstance(cls.__dict__.get(function.__name__, None), staticmethod)
+    ):
+        arg_names = arg_names[1:]
+    # Remove any names that will be replaced with mocks.
+    if hasattr(function, "__wrapped__"):
+        arg_names = arg_names[num_mock_patch_args(function) :]
+    return arg_names
+
+
+@contextmanager
+def dummy_context_manager():
+    """Context manager that does nothing, useful in situations where you might need an actual context manager or not
+    depending on some condition. Using this allow to keep the same code"""
+    yield
+
+
+def get_default_arg_names(function):
+    # Note: this code intentionally mirrors the code at the beginning of getfuncargnames,
+    # to get the arguments which were excluded from its result because they had default values
+    return tuple(
+        p.name
+        for p in signature(function).parameters.values()
+        if p.kind in (Parameter.POSITIONAL_OR_KEYWORD, Parameter.KEYWORD_ONLY)
+        and p.default is not Parameter.empty
+    )
+
+
+_non_printable_ascii_translate_table = {
+    i: u"\\x{:02x}".format(i) for i in range(128) if i not in range(32, 127)
+}
+_non_printable_ascii_translate_table.update(
+    {ord("\t"): u"\\t", ord("\r"): u"\\r", ord("\n"): u"\\n"}
+)
+
+
+def _translate_non_printable(s):
+    return s.translate(_non_printable_ascii_translate_table)
+
+
+if _PY3:
+    STRING_TYPES = bytes, str
+    UNICODE_TYPES = six.text_type
+
+    if PY35:
+
+        def _bytes_to_ascii(val):
+            return val.decode("ascii", "backslashreplace")
+
+    else:
+
+        def _bytes_to_ascii(val):
+            if val:
+                # source: http://goo.gl/bGsnwC
+                encoded_bytes, _ = codecs.escape_encode(val)
+                return encoded_bytes.decode("ascii")
+            else:
+                # empty bytes crashes codecs.escape_encode (#1087)
+                return ""
+
+    def ascii_escaped(val):
+        """If val is pure ascii, returns it as a str().  Otherwise, escapes
+        bytes objects into a sequence of escaped bytes:
+
+        b'\xc3\xb4\xc5\xd6' -> u'\\xc3\\xb4\\xc5\\xd6'
+
+        and escapes unicode objects into a sequence of escaped unicode
+        ids, e.g.:
+
+        '4\\nV\\U00043efa\\x0eMXWB\\x1e\\u3028\\u15fd\\xcd\\U0007d944'
+
+        note:
+           the obvious "v.decode('unicode-escape')" will return
+           valid utf-8 unicode if it finds them in bytes, but we
+           want to return escaped bytes for any byte, even if they match
+           a utf-8 string.
+
+        """
+        if isinstance(val, bytes):
+            ret = _bytes_to_ascii(val)
+        else:
+            ret = val
+        return ret
+
+
+else:
+    STRING_TYPES = six.string_types
+    UNICODE_TYPES = six.text_type
+
+    def ascii_escaped(val):
+        """In py2 bytes and str are the same type, so return if it's a bytes
+        object, return it unchanged if it is a full ascii string,
+        otherwise escape it into its binary form.
+
+        If it's a unicode string, change the unicode characters into
+        unicode escapes.
+
+        """
+        if isinstance(val, bytes):
+            try:
+                ret = val.decode("utf-8")
+            except UnicodeDecodeError:
+                ret = val.decode("utf-8", "ignore")
+        else:
+            ret = val.encode("utf-8", "replace").decode("utf-8")
+        return ret
+
+
+class _PytestWrapper(object):
+    """Dummy wrapper around a function object for internal use only.
+
+    Used to correctly unwrap the underlying function object
+    when we are creating fixtures, because we wrap the function object ourselves with a decorator
+    to issue warnings when the fixture function is called directly.
+    """
+
+    def __init__(self, obj):
+        self.obj = obj
+
+
+def get_real_func(obj):
+    """ gets the real function object of the (possibly) wrapped object by
+    functools.wraps or functools.partial.
+    """
+    start_obj = obj
+    for i in range(100):
+        # __pytest_wrapped__ is set by @pytest.fixture when wrapping the fixture function
+        # to trigger a warning if it gets called directly instead of by pytest: we don't
+        # want to unwrap further than this otherwise we lose useful wrappings like @mock.patch (#3774)
+        new_obj = getattr(obj, "__pytest_wrapped__", None)
+        if isinstance(new_obj, _PytestWrapper):
+            obj = new_obj.obj
+            break
+        new_obj = getattr(obj, "__wrapped__", None)
+        if new_obj is None:
+            break
+        obj = new_obj
+    else:
+        raise ValueError(
+            ("could not find real function of {start}\nstopped at {current}").format(
+                start=saferepr(start_obj), current=saferepr(obj)
+            )
+        )
+    if isinstance(obj, functools.partial):
+        obj = obj.func
+    return obj
+
+
+def get_real_method(obj, holder):
+    """
+    Attempts to obtain the real function object that might be wrapping ``obj``, while at the same time
+    returning a bound method to ``holder`` if the original object was a bound method.
+    """
+    try:
+        is_method = hasattr(obj, "__func__")
+        obj = get_real_func(obj)
+    except Exception:
+        return obj
+    if is_method and hasattr(obj, "__get__") and callable(obj.__get__):
+        obj = obj.__get__(holder)
+    return obj
+
+
+def getfslineno(obj):
+    # xxx let decorators etc specify a sane ordering
+    obj = get_real_func(obj)
+    if hasattr(obj, "place_as"):
+        obj = obj.place_as
+    fslineno = _pytest._code.getfslineno(obj)
+    assert isinstance(fslineno[1], int), obj
+    return fslineno
+
+
+def getimfunc(func):
+    try:
+        return func.__func__
+    except AttributeError:
+        return func
+
+
+def safe_getattr(object, name, default):
+    """ Like getattr but return default upon any Exception or any OutcomeException.
+
+    Attribute access can potentially fail for 'evil' Python objects.
+    See issue #214.
+    It catches OutcomeException because of #2490 (issue #580), new outcomes are derived from BaseException
+    instead of Exception (for more details check #2707)
+    """
+    try:
+        return getattr(object, name, default)
+    except TEST_OUTCOME:
+        return default
+
+
+def safe_isclass(obj):
+    """Ignore any exception via isinstance on Python 3."""
+    try:
+        return isclass(obj)
+    except Exception:
+        return False
+
+
+def _is_unittest_unexpected_success_a_failure():
+    """Return if the test suite should fail if an @expectedFailure unittest test PASSES.
+
+    From https://docs.python.org/3/library/unittest.html?highlight=unittest#unittest.TestResult.wasSuccessful:
+        Changed in version 3.4: Returns False if there were any
+        unexpectedSuccesses from tests marked with the expectedFailure() decorator.
+    """
+    return sys.version_info >= (3, 4)
+
+
+if _PY3:
+
+    def safe_str(v):
+        """returns v as string"""
+        try:
+            return str(v)
+        except UnicodeEncodeError:
+            return str(v, encoding="utf-8")
+
+
+else:
+
+    def safe_str(v):
+        """returns v as string, converting to utf-8 if necessary"""
+        try:
+            return str(v)
+        except UnicodeError:
+            if not isinstance(v, text_type):
+                v = text_type(v)
+            errors = "replace"
+            return v.encode("utf-8", errors)
+
+
+COLLECT_FAKEMODULE_ATTRIBUTES = (
+    "Collector",
+    "Module",
+    "Function",
+    "Instance",
+    "Session",
+    "Item",
+    "Class",
+    "File",
+    "_fillfuncargs",
+)
+
+
+def _setup_collect_fakemodule():
+    from types import ModuleType
+    import pytest
+
+    pytest.collect = ModuleType("pytest.collect")
+    pytest.collect.__all__ = []  # used for setns
+    for attribute in COLLECT_FAKEMODULE_ATTRIBUTES:
+        setattr(pytest.collect, attribute, getattr(pytest, attribute))
+
+
+if _PY2:
+    # Without this the test_dupfile_on_textio will fail, otherwise CaptureIO could directly inherit from StringIO.
+    from py.io import TextIO
+
+    class CaptureIO(TextIO):
+        @property
+        def encoding(self):
+            return getattr(self, "_encoding", "UTF-8")
+
+
+else:
+    import io
+
+    class CaptureIO(io.TextIOWrapper):
+        def __init__(self):
+            super(CaptureIO, self).__init__(
+                io.BytesIO(), encoding="UTF-8", newline="", write_through=True
+            )
+
+        def getvalue(self):
+            return self.buffer.getvalue().decode("UTF-8")
+
+
+class FuncargnamesCompatAttr(object):
+    """ helper class so that Metafunc, Function and FixtureRequest
+    don't need to each define the "funcargnames" compatibility attribute.
+    """
+
+    @property
+    def funcargnames(self):
+        """ alias attribute for ``fixturenames`` for pre-2.3 compatibility"""
+        return self.fixturenames
+
+
+if six.PY2:
+
+    def lru_cache(*_, **__):
+        def dec(fn):
+            return fn
+
+        return dec
+
+
+else:
+    from functools import lru_cache  # noqa: F401
+
+
+if getattr(attr, "__version_info__", ()) >= (19, 2):
+    ATTRS_EQ_FIELD = "eq"
+else:
+    ATTRS_EQ_FIELD = "cmp"
diff --git a/contrib/python/pytest/py2/_pytest/config/__init__.py b/contrib/python/pytest/py2/_pytest/config/__init__.py
new file mode 100644
index 0000000000..0737ff9d51
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/config/__init__.py
@@ -0,0 +1,1203 @@
+# -*- coding: utf-8 -*-
+""" command line options, ini-file and conftest.py processing. """
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import argparse
+import copy
+import inspect
+import os
+import shlex
+import sys
+import types
+import warnings
+
+import attr
+import py
+import six
+from packaging.version import Version
+from pluggy import HookimplMarker
+from pluggy import HookspecMarker
+from pluggy import PluginManager
+
+import _pytest._code
+import _pytest.assertion
+import _pytest.hookspec  # the extension point definitions
+from .exceptions import PrintHelp
+from .exceptions import UsageError
+from .findpaths import determine_setup
+from .findpaths import exists
+from _pytest import deprecated
+from _pytest._code import ExceptionInfo
+from _pytest._code import filter_traceback
+from _pytest.compat import importlib_metadata
+from _pytest.compat import lru_cache
+from _pytest.compat import safe_str
+from _pytest.outcomes import fail
+from _pytest.outcomes import Skipped
+from _pytest.pathlib import Path
+from _pytest.warning_types import PytestConfigWarning
+
+hookimpl = HookimplMarker("pytest")
+hookspec = HookspecMarker("pytest")
+
+
+class ConftestImportFailure(Exception):
+    def __init__(self, path, excinfo):
+        Exception.__init__(self, path, excinfo)
+        self.path = path
+        self.excinfo = excinfo
+
+
+def main(args=None, plugins=None):
+    """ return exit code, after performing an in-process test run.
+
+    :arg args: list of command line arguments.
+
+    :arg plugins: list of plugin objects to be auto-registered during
+                  initialization.
+    """
+    from _pytest.main import EXIT_USAGEERROR
+
+    try:
+        try:
+            config = _prepareconfig(args, plugins)
+        except ConftestImportFailure as e:
+            exc_info = ExceptionInfo(e.excinfo)
+            tw = py.io.TerminalWriter(sys.stderr)
+            tw.line(
+                "ImportError while loading conftest '{e.path}'.".format(e=e), red=True
+            )
+            exc_info.traceback = exc_info.traceback.filter(filter_traceback)
+            exc_repr = (
+                exc_info.getrepr(style="short", chain=False)
+                if exc_info.traceback
+                else exc_info.exconly()
+            )
+            formatted_tb = safe_str(exc_repr)
+            for line in formatted_tb.splitlines():
+                tw.line(line.rstrip(), red=True)
+            return 4
+        else:
+            try:
+                return config.hook.pytest_cmdline_main(config=config)
+            finally:
+                config._ensure_unconfigure()
+    except UsageError as e:
+        tw = py.io.TerminalWriter(sys.stderr)
+        for msg in e.args:
+            tw.line("ERROR: {}\n".format(msg), red=True)
+        return EXIT_USAGEERROR
+
+
+class cmdline(object):  # compatibility namespace
+    main = staticmethod(main)
+
+
+def filename_arg(path, optname):
+    """ Argparse type validator for filename arguments.
+
+    :path: path of filename
+    :optname: name of the option
+    """
+    if os.path.isdir(path):
+        raise UsageError("{} must be a filename, given: {}".format(optname, path))
+    return path
+
+
+def directory_arg(path, optname):
+    """Argparse type validator for directory arguments.
+
+    :path: path of directory
+    :optname: name of the option
+    """
+    if not os.path.isdir(path):
+        raise UsageError("{} must be a directory, given: {}".format(optname, path))
+    return path
+
+
+# Plugins that cannot be disabled via "-p no:X" currently.
+essential_plugins = (
+    "mark",
+    "main",
+    "runner",
+    "fixtures",
+    "helpconfig",  # Provides -p.
+)
+
+default_plugins = essential_plugins + (
+    "python",
+    "terminal",
+    "debugging",
+    "unittest",
+    "capture",
+    "skipping",
+    "tmpdir",
+    "monkeypatch",
+    "recwarn",
+    "pastebin",
+    "nose",
+    "assertion",
+    "junitxml",
+    "resultlog",
+    "doctest",
+    "cacheprovider",
+    "freeze_support",
+    "setuponly",
+    "setupplan",
+    "stepwise",
+    "warnings",
+    "logging",
+    "reports",
+)
+
+builtin_plugins = set(default_plugins)
+builtin_plugins.add("pytester")
+
+
+def get_config(args=None, plugins=None):
+    # subsequent calls to main will create a fresh instance
+    pluginmanager = PytestPluginManager()
+    config = Config(
+        pluginmanager,
+        invocation_params=Config.InvocationParams(
+            args=args, plugins=plugins, dir=Path().resolve()
+        ),
+    )
+
+    if args is not None:
+        # Handle any "-p no:plugin" args.
+        pluginmanager.consider_preparse(args)
+
+    for spec in default_plugins:
+        pluginmanager.import_plugin(spec)
+    return config
+
+
+def get_plugin_manager():
+    """
+    Obtain a new instance of the
+    :py:class:`_pytest.config.PytestPluginManager`, with default plugins
+    already loaded.
+
+    This function can be used by integration with other tools, like hooking
+    into pytest to run tests into an IDE.
+    """
+    return get_config().pluginmanager
+
+
+def _prepareconfig(args=None, plugins=None):
+    warning = None
+    if args is None:
+        args = sys.argv[1:]
+    elif isinstance(args, py.path.local):
+        args = [str(args)]
+    elif not isinstance(args, (tuple, list)):
+        msg = "`args` parameter expected to be a list or tuple of strings, got: {!r} (type: {})"
+        raise TypeError(msg.format(args, type(args)))
+
+    config = get_config(args, plugins)
+    pluginmanager = config.pluginmanager
+    try:
+        if plugins:
+            for plugin in plugins:
+                if isinstance(plugin, six.string_types):
+                    pluginmanager.consider_pluginarg(plugin)
+                else:
+                    pluginmanager.register(plugin)
+        if warning:
+            from _pytest.warnings import _issue_warning_captured
+
+            _issue_warning_captured(warning, hook=config.hook, stacklevel=4)
+        return pluginmanager.hook.pytest_cmdline_parse(
+            pluginmanager=pluginmanager, args=args
+        )
+    except BaseException:
+        config._ensure_unconfigure()
+        raise
+
+
+class PytestPluginManager(PluginManager):
+    """
+    Overwrites :py:class:`pluggy.PluginManager <pluggy.PluginManager>` to add pytest-specific
+    functionality:
+
+    * loading plugins from the command line, ``PYTEST_PLUGINS`` env variable and
+      ``pytest_plugins`` global variables found in plugins being loaded;
+    * ``conftest.py`` loading during start-up;
+    """
+
+    def __init__(self):
+        super(PytestPluginManager, self).__init__("pytest")
+        self._conftest_plugins = set()
+
+        # state related to local conftest plugins
+        self._dirpath2confmods = {}
+        self._conftestpath2mod = {}
+        self._confcutdir = None
+        self._noconftest = False
+        self._duplicatepaths = set()
+
+        self.add_hookspecs(_pytest.hookspec)
+        self.register(self)
+        if os.environ.get("PYTEST_DEBUG"):
+            err = sys.stderr
+            encoding = getattr(err, "encoding", "utf8")
+            try:
+                err = py.io.dupfile(err, encoding=encoding)
+            except Exception:
+                pass
+            self.trace.root.setwriter(err.write)
+            self.enable_tracing()
+
+        # Config._consider_importhook will set a real object if required.
+        self.rewrite_hook = _pytest.assertion.DummyRewriteHook()
+        # Used to know when we are importing conftests after the pytest_configure stage
+        self._configured = False
+
+    def addhooks(self, module_or_class):
+        """
+        .. deprecated:: 2.8
+
+        Use :py:meth:`pluggy.PluginManager.add_hookspecs <PluginManager.add_hookspecs>`
+        instead.
+        """
+        warnings.warn(deprecated.PLUGIN_MANAGER_ADDHOOKS, stacklevel=2)
+        return self.add_hookspecs(module_or_class)
+
+    def parse_hookimpl_opts(self, plugin, name):
+        # pytest hooks are always prefixed with pytest_
+        # so we avoid accessing possibly non-readable attributes
+        # (see issue #1073)
+        if not name.startswith("pytest_"):
+            return
+        # ignore names which can not be hooks
+        if name == "pytest_plugins":
+            return
+
+        method = getattr(plugin, name)
+        opts = super(PytestPluginManager, self).parse_hookimpl_opts(plugin, name)
+
+        # consider only actual functions for hooks (#3775)
+        if not inspect.isroutine(method):
+            return
+
+        # collect unmarked hooks as long as they have the `pytest_' prefix
+        if opts is None and name.startswith("pytest_"):
+            opts = {}
+        if opts is not None:
+            # TODO: DeprecationWarning, people should use hookimpl
+            # https://github.com/pytest-dev/pytest/issues/4562
+            known_marks = {m.name for m in getattr(method, "pytestmark", [])}
+
+            for name in ("tryfirst", "trylast", "optionalhook", "hookwrapper"):
+                opts.setdefault(name, hasattr(method, name) or name in known_marks)
+        return opts
+
+    def parse_hookspec_opts(self, module_or_class, name):
+        opts = super(PytestPluginManager, self).parse_hookspec_opts(
+            module_or_class, name
+        )
+        if opts is None:
+            method = getattr(module_or_class, name)
+
+            if name.startswith("pytest_"):
+                # todo: deprecate hookspec hacks
+                # https://github.com/pytest-dev/pytest/issues/4562
+                known_marks = {m.name for m in getattr(method, "pytestmark", [])}
+                opts = {
+                    "firstresult": hasattr(method, "firstresult")
+                    or "firstresult" in known_marks,
+                    "historic": hasattr(method, "historic")
+                    or "historic" in known_marks,
+                }
+        return opts
+
+    def register(self, plugin, name=None):
+        if name in ["pytest_catchlog", "pytest_capturelog"]:
+            warnings.warn(
+                PytestConfigWarning(
+                    "{} plugin has been merged into the core, "
+                    "please remove it from your requirements.".format(
+                        name.replace("_", "-")
+                    )
+                )
+            )
+            return
+        ret = super(PytestPluginManager, self).register(plugin, name)
+        if ret:
+            self.hook.pytest_plugin_registered.call_historic(
+                kwargs=dict(plugin=plugin, manager=self)
+            )
+
+            if isinstance(plugin, types.ModuleType):
+                self.consider_module(plugin)
+        return ret
+
+    def getplugin(self, name):
+        # support deprecated naming because plugins (xdist e.g.) use it
+        return self.get_plugin(name)
+
+    def hasplugin(self, name):
+        """Return True if the plugin with the given name is registered."""
+        return bool(self.get_plugin(name))
+
+    def pytest_configure(self, config):
+        # XXX now that the pluginmanager exposes hookimpl(tryfirst...)
+        # we should remove tryfirst/trylast as markers
+        config.addinivalue_line(
+            "markers",
+            "tryfirst: mark a hook implementation function such that the "
+            "plugin machinery will try to call it first/as early as possible.",
+        )
+        config.addinivalue_line(
+            "markers",
+            "trylast: mark a hook implementation function such that the "
+            "plugin machinery will try to call it last/as late as possible.",
+        )
+        self._configured = True
+
+    #
+    # internal API for local conftest plugin handling
+    #
+    def _set_initial_conftests(self, namespace):
+        """ load initial conftest files given a preparsed "namespace".
+            As conftest files may add their own command line options
+            which have arguments ('--my-opt somepath') we might get some
+            false positives.  All builtin and 3rd party plugins will have
+            been loaded, however, so common options will not confuse our logic
+            here.
+        """
+        current = py.path.local()
+        self._confcutdir = (
+            current.join(namespace.confcutdir, abs=True)
+            if namespace.confcutdir
+            else None
+        )
+        self._noconftest = namespace.noconftest
+        self._using_pyargs = namespace.pyargs
+        testpaths = namespace.file_or_dir
+        foundanchor = False
+        for path in testpaths:
+            path = str(path)
+            # remove node-id syntax
+            i = path.find("::")
+            if i != -1:
+                path = path[:i]
+            anchor = current.join(path, abs=1)
+            if exists(anchor):  # we found some file object
+                self._try_load_conftest(anchor)
+                foundanchor = True
+        if not foundanchor:
+            self._try_load_conftest(current)
+
+    def _try_load_conftest(self, anchor):
+        self._getconftestmodules(anchor)
+        # let's also consider test* subdirs
+        if anchor.check(dir=1):
+            for x in anchor.listdir("test*"):
+                if x.check(dir=1):
+                    self._getconftestmodules(x)
+
+    @lru_cache(maxsize=128)
+    def _getconftestmodules(self, path):
+        if self._noconftest:
+            return []
+
+        if path.isfile():
+            directory = path.dirpath()
+        else:
+            directory = path
+
+        if six.PY2:  # py2 is not using lru_cache.
+            try:
+                return self._dirpath2confmods[directory]
+            except KeyError:
+                pass
+
+        # XXX these days we may rather want to use config.rootdir
+        # and allow users to opt into looking into the rootdir parent
+        # directories instead of requiring to specify confcutdir
+        clist = []
+        for parent in directory.realpath().parts():
+            if self._confcutdir and self._confcutdir.relto(parent):
+                continue
+            conftestpath = parent.join("conftest.py")
+            if conftestpath.isfile():
+                # Use realpath to avoid loading the same conftest twice
+                # with build systems that create build directories containing
+                # symlinks to actual files.
+                mod = self._importconftest(conftestpath.realpath())
+                clist.append(mod)
+        self._dirpath2confmods[directory] = clist
+        return clist
+
+    def _rget_with_confmod(self, name, path):
+        modules = self._getconftestmodules(path)
+        for mod in reversed(modules):
+            try:
+                return mod, getattr(mod, name)
+            except AttributeError:
+                continue
+        raise KeyError(name)
+
+    def _importconftest(self, conftestpath):
+        try:
+            return self._conftestpath2mod[conftestpath]
+        except KeyError:
+            pkgpath = conftestpath.pypkgpath()
+            if pkgpath is None:
+                _ensure_removed_sysmodule(conftestpath.purebasename)
+            try:
+                mod = conftestpath.pyimport()
+                if (
+                    hasattr(mod, "pytest_plugins")
+                    and self._configured
+                    and not self._using_pyargs
+                ):
+                    from _pytest.deprecated import (
+                        PYTEST_PLUGINS_FROM_NON_TOP_LEVEL_CONFTEST,
+                    )
+
+                    fail(
+                        PYTEST_PLUGINS_FROM_NON_TOP_LEVEL_CONFTEST.format(
+                            conftestpath, self._confcutdir
+                        ),
+                        pytrace=False,
+                    )
+            except Exception:
+                raise ConftestImportFailure(conftestpath, sys.exc_info())
+
+            self._conftest_plugins.add(mod)
+            self._conftestpath2mod[conftestpath] = mod
+            dirpath = conftestpath.dirpath()
+            if dirpath in self._dirpath2confmods:
+                for path, mods in self._dirpath2confmods.items():
+                    if path and path.relto(dirpath) or path == dirpath:
+                        assert mod not in mods
+                        mods.append(mod)
+            self.trace("loaded conftestmodule %r" % (mod))
+            self.consider_conftest(mod)
+            return mod
+
+    #
+    # API for bootstrapping plugin loading
+    #
+    #
+
+    def consider_preparse(self, args):
+        i = 0
+        n = len(args)
+        while i < n:
+            opt = args[i]
+            i += 1
+            if isinstance(opt, six.string_types):
+                if opt == "-p":
+                    try:
+                        parg = args[i]
+                    except IndexError:
+                        return
+                    i += 1
+                elif opt.startswith("-p"):
+                    parg = opt[2:]
+                else:
+                    continue
+                self.consider_pluginarg(parg)
+
+    def consider_pluginarg(self, arg):
+        if arg.startswith("no:"):
+            name = arg[3:]
+            if name in essential_plugins:
+                raise UsageError("plugin %s cannot be disabled" % name)
+
+            # PR #4304 : remove stepwise if cacheprovider is blocked
+            if name == "cacheprovider":
+                self.set_blocked("stepwise")
+                self.set_blocked("pytest_stepwise")
+
+            self.set_blocked(name)
+            if not name.startswith("pytest_"):
+                self.set_blocked("pytest_" + name)
+        else:
+            name = arg
+            # Unblock the plugin.  None indicates that it has been blocked.
+            # There is no interface with pluggy for this.
+            if self._name2plugin.get(name, -1) is None:
+                del self._name2plugin[name]
+            if not name.startswith("pytest_"):
+                if self._name2plugin.get("pytest_" + name, -1) is None:
+                    del self._name2plugin["pytest_" + name]
+            self.import_plugin(arg, consider_entry_points=True)
+
+    def consider_conftest(self, conftestmodule):
+        self.register(conftestmodule, name=conftestmodule.__file__)
+
+    def consider_env(self):
+        self._import_plugin_specs(os.environ.get("PYTEST_PLUGINS"))
+
+    def consider_module(self, mod):
+        self._import_plugin_specs(getattr(mod, "pytest_plugins", []))
+
+    def _import_plugin_specs(self, spec):
+        plugins = _get_plugin_specs_as_list(spec)
+        for import_spec in plugins:
+            self.import_plugin(import_spec)
+
+    def import_plugin(self, modname, consider_entry_points=False):
+        """
+        Imports a plugin with ``modname``. If ``consider_entry_points`` is True, entry point
+        names are also considered to find a plugin.
+        """
+        # most often modname refers to builtin modules, e.g. "pytester",
+        # "terminal" or "capture".  Those plugins are registered under their
+        # basename for historic purposes but must be imported with the
+        # _pytest prefix.
+        assert isinstance(modname, six.string_types), (
+            "module name as text required, got %r" % modname
+        )
+        modname = str(modname)
+        if self.is_blocked(modname) or self.get_plugin(modname) is not None:
+            return
+
+        importspec = "_pytest." + modname if modname in builtin_plugins else modname
+        self.rewrite_hook.mark_rewrite(importspec)
+
+        if consider_entry_points:
+            loaded = self.load_setuptools_entrypoints("pytest11", name=modname)
+            if loaded:
+                return
+
+        try:
+            __import__(importspec)
+        except ImportError as e:
+            new_exc_message = 'Error importing plugin "%s": %s' % (
+                modname,
+                safe_str(e.args[0]),
+            )
+            new_exc = ImportError(new_exc_message)
+            tb = sys.exc_info()[2]
+
+            six.reraise(ImportError, new_exc, tb)
+
+        except Skipped as e:
+            from _pytest.warnings import _issue_warning_captured
+
+            _issue_warning_captured(
+                PytestConfigWarning("skipped plugin %r: %s" % (modname, e.msg)),
+                self.hook,
+                stacklevel=1,
+            )
+        else:
+            mod = sys.modules[importspec]
+            self.register(mod, modname)
+
+
+def _get_plugin_specs_as_list(specs):
+    """
+    Parses a list of "plugin specs" and returns a list of plugin names.
+
+    Plugin specs can be given as a list of strings separated by "," or already as a list/tuple in
+    which case it is returned as a list. Specs can also be `None` in which case an
+    empty list is returned.
+    """
+    if specs is not None and not isinstance(specs, types.ModuleType):
+        if isinstance(specs, six.string_types):
+            specs = specs.split(",") if specs else []
+        if not isinstance(specs, (list, tuple)):
+            raise UsageError(
+                "Plugin specs must be a ','-separated string or a "
+                "list/tuple of strings for plugin names. Given: %r" % specs
+            )
+        return list(specs)
+    return []
+
+
+def _ensure_removed_sysmodule(modname):
+    try:
+        del sys.modules[modname]
+    except KeyError:
+        pass
+
+
+class Notset(object):
+    def __repr__(self):
+        return "<NOTSET>"
+
+
+notset = Notset()
+
+
+def _iter_rewritable_modules(package_files):
+    """
+    Given an iterable of file names in a source distribution, return the "names" that should
+    be marked for assertion rewrite (for example the package "pytest_mock/__init__.py" should
+    be added as "pytest_mock" in the assertion rewrite mechanism.
+
+    This function has to deal with dist-info based distributions and egg based distributions
+    (which are still very much in use for "editable" installs).
+
+    Here are the file names as seen in a dist-info based distribution:
+
+        pytest_mock/__init__.py
+        pytest_mock/_version.py
+        pytest_mock/plugin.py
+        pytest_mock.egg-info/PKG-INFO
+
+    Here are the file names as seen in an egg based distribution:
+
+        src/pytest_mock/__init__.py
+        src/pytest_mock/_version.py
+        src/pytest_mock/plugin.py
+        src/pytest_mock.egg-info/PKG-INFO
+        LICENSE
+        setup.py
+
+    We have to take in account those two distribution flavors in order to determine which
+    names should be considered for assertion rewriting.
+
+    More information:
+        https://github.com/pytest-dev/pytest-mock/issues/167
+    """
+    package_files = list(package_files)
+    seen_some = False
+    for fn in package_files:
+        is_simple_module = "/" not in fn and fn.endswith(".py")
+        is_package = fn.count("/") == 1 and fn.endswith("__init__.py")
+        if is_simple_module:
+            module_name, _ = os.path.splitext(fn)
+            # we ignore "setup.py" at the root of the distribution
+            if module_name != "setup":
+                seen_some = True
+                yield module_name
+        elif is_package:
+            package_name = os.path.dirname(fn)
+            seen_some = True
+            yield package_name
+
+    if not seen_some:
+        # at this point we did not find any packages or modules suitable for assertion
+        # rewriting, so we try again by stripping the first path component (to account for
+        # "src" based source trees for example)
+        # this approach lets us have the common case continue to be fast, as egg-distributions
+        # are rarer
+        new_package_files = []
+        for fn in package_files:
+            parts = fn.split("/")
+            new_fn = "/".join(parts[1:])
+            if new_fn:
+                new_package_files.append(new_fn)
+        if new_package_files:
+            for _module in _iter_rewritable_modules(new_package_files):
+                yield _module
+
+
+class Config(object):
+    """
+    Access to configuration values, pluginmanager and plugin hooks.
+
+    :ivar PytestPluginManager pluginmanager: the plugin manager handles plugin registration and hook invocation.
+
+    :ivar argparse.Namespace option: access to command line option as attributes.
+
+    :ivar InvocationParams invocation_params:
+
+        Object containing the parameters regarding the ``pytest.main``
+        invocation.
+        Contains the followinig read-only attributes:
+        * ``args``: list of command-line arguments as passed to ``pytest.main()``.
+        * ``plugins``: list of extra plugins, might be None
+        * ``dir``: directory where ``pytest.main()`` was invoked from.
+    """
+
+    @attr.s(frozen=True)
+    class InvocationParams(object):
+        """Holds parameters passed during ``pytest.main()``
+
+        .. note::
+
+            Currently the environment variable PYTEST_ADDOPTS is also handled by
+            pytest implicitly, not being part of the invocation.
+
+            Plugins accessing ``InvocationParams`` must be aware of that.
+        """
+
+        args = attr.ib()
+        plugins = attr.ib()
+        dir = attr.ib()
+
+    def __init__(self, pluginmanager, invocation_params=None, *args):
+        from .argparsing import Parser, FILE_OR_DIR
+
+        if invocation_params is None:
+            invocation_params = self.InvocationParams(
+                args=(), plugins=None, dir=Path().resolve()
+            )
+
+        #: access to command line option as attributes.
+        #: (deprecated), use :py:func:`getoption() <_pytest.config.Config.getoption>` instead
+        self.option = argparse.Namespace()
+
+        self.invocation_params = invocation_params
+
+        _a = FILE_OR_DIR
+        self._parser = Parser(
+            usage="%%(prog)s [options] [%s] [%s] [...]" % (_a, _a),
+            processopt=self._processopt,
+        )
+        #: a pluginmanager instance
+        self.pluginmanager = pluginmanager
+        self.trace = self.pluginmanager.trace.root.get("config")
+        self.hook = self.pluginmanager.hook
+        self._inicache = {}
+        self._override_ini = ()
+        self._opt2dest = {}
+        self._cleanup = []
+        self.pluginmanager.register(self, "pytestconfig")
+        self._configured = False
+        self.hook.pytest_addoption.call_historic(kwargs=dict(parser=self._parser))
+
+    @property
+    def invocation_dir(self):
+        """Backward compatibility"""
+        return py.path.local(str(self.invocation_params.dir))
+
+    def add_cleanup(self, func):
+        """ Add a function to be called when the config object gets out of
+        use (usually coninciding with pytest_unconfigure)."""
+        self._cleanup.append(func)
+
+    def _do_configure(self):
+        assert not self._configured
+        self._configured = True
+        self.hook.pytest_configure.call_historic(kwargs=dict(config=self))
+
+    def _ensure_unconfigure(self):
+        if self._configured:
+            self._configured = False
+            self.hook.pytest_unconfigure(config=self)
+            self.hook.pytest_configure._call_history = []
+        while self._cleanup:
+            fin = self._cleanup.pop()
+            fin()
+
+    def get_terminal_writer(self):
+        return self.pluginmanager.get_plugin("terminalreporter")._tw
+
+    def pytest_cmdline_parse(self, pluginmanager, args):
+        try:
+            self.parse(args)
+        except UsageError:
+
+            # Handle --version and --help here in a minimal fashion.
+            # This gets done via helpconfig normally, but its
+            # pytest_cmdline_main is not called in case of errors.
+            if getattr(self.option, "version", False) or "--version" in args:
+                from _pytest.helpconfig import showversion
+
+                showversion(self)
+            elif (
+                getattr(self.option, "help", False) or "--help" in args or "-h" in args
+            ):
+                self._parser._getparser().print_help()
+                sys.stdout.write(
+                    "\nNOTE: displaying only minimal help due to UsageError.\n\n"
+                )
+
+            raise
+
+        return self
+
+    def notify_exception(self, excinfo, option=None):
+        if option and getattr(option, "fulltrace", False):
+            style = "long"
+        else:
+            style = "native"
+        excrepr = excinfo.getrepr(
+            funcargs=True, showlocals=getattr(option, "showlocals", False), style=style
+        )
+        res = self.hook.pytest_internalerror(excrepr=excrepr, excinfo=excinfo)
+        if not any(res):
+            for line in str(excrepr).split("\n"):
+                sys.stderr.write("INTERNALERROR> %s\n" % line)
+                sys.stderr.flush()
+
+    def cwd_relative_nodeid(self, nodeid):
+        # nodeid's are relative to the rootpath, compute relative to cwd
+        if self.invocation_dir != self.rootdir:
+            fullpath = self.rootdir.join(nodeid)
+            nodeid = self.invocation_dir.bestrelpath(fullpath)
+        return nodeid
+
+    @classmethod
+    def fromdictargs(cls, option_dict, args):
+        """ constructor useable for subprocesses. """
+        config = get_config(args)
+        config.option.__dict__.update(option_dict)
+        config.parse(args, addopts=False)
+        for x in config.option.plugins:
+            config.pluginmanager.consider_pluginarg(x)
+        return config
+
+    def _processopt(self, opt):
+        for name in opt._short_opts + opt._long_opts:
+            self._opt2dest[name] = opt.dest
+
+        if hasattr(opt, "default") and opt.dest:
+            if not hasattr(self.option, opt.dest):
+                setattr(self.option, opt.dest, opt.default)
+
+    @hookimpl(trylast=True)
+    def pytest_load_initial_conftests(self, early_config):
+        self.pluginmanager._set_initial_conftests(early_config.known_args_namespace)
+
+    def _initini(self, args):
+        ns, unknown_args = self._parser.parse_known_and_unknown_args(
+            args, namespace=copy.copy(self.option)
+        )
+        r = determine_setup(
+            ns.inifilename,
+            ns.file_or_dir + unknown_args,
+            rootdir_cmd_arg=ns.rootdir or None,
+            config=self,
+        )
+        self.rootdir, self.inifile, self.inicfg = r
+        self._parser.extra_info["rootdir"] = self.rootdir
+        self._parser.extra_info["inifile"] = self.inifile
+        self._parser.addini("addopts", "extra command line options", "args")
+        self._parser.addini("minversion", "minimally required pytest version")
+        self._override_ini = ns.override_ini or ()
+
+    def _consider_importhook(self, args):
+        """Install the PEP 302 import hook if using assertion rewriting.
+
+        Needs to parse the --assert=<mode> option from the commandline
+        and find all the installed plugins to mark them for rewriting
+        by the importhook.
+        """
+        ns, unknown_args = self._parser.parse_known_and_unknown_args(args)
+        mode = getattr(ns, "assertmode", "plain")
+        if mode == "rewrite":
+            try:
+                hook = _pytest.assertion.install_importhook(self)
+            except SystemError:
+                mode = "plain"
+            else:
+                self._mark_plugins_for_rewrite(hook)
+        _warn_about_missing_assertion(mode)
+
+    def _mark_plugins_for_rewrite(self, hook):
+        """
+        Given an importhook, mark for rewrite any top-level
+        modules or packages in the distribution package for
+        all pytest plugins.
+        """
+        self.pluginmanager.rewrite_hook = hook
+
+        if os.environ.get("PYTEST_DISABLE_PLUGIN_AUTOLOAD"):
+            # We don't autoload from setuptools entry points, no need to continue.
+            return
+
+        package_files = (
+            str(file)
+            for dist in importlib_metadata.distributions()
+            if any(ep.group == "pytest11" for ep in dist.entry_points)
+            for file in dist.files or []
+        )
+
+        for name in _iter_rewritable_modules(package_files):
+            hook.mark_rewrite(name)
+
+    def _validate_args(self, args, via):
+        """Validate known args."""
+        self._parser._config_source_hint = via
+        try:
+            self._parser.parse_known_and_unknown_args(
+                args, namespace=copy.copy(self.option)
+            )
+        finally:
+            del self._parser._config_source_hint
+
+        return args
+
+    def _preparse(self, args, addopts=True):
+        if addopts:
+            env_addopts = os.environ.get("PYTEST_ADDOPTS", "")
+            if len(env_addopts):
+                args[:] = (
+                    self._validate_args(shlex.split(env_addopts), "via PYTEST_ADDOPTS")
+                    + args
+                )
+        self._initini(args)
+        if addopts:
+            args[:] = (
+                self._validate_args(self.getini("addopts"), "via addopts config") + args
+            )
+
+        self._checkversion()
+        self._consider_importhook(args)
+        self.pluginmanager.consider_preparse(args)
+        if not os.environ.get("PYTEST_DISABLE_PLUGIN_AUTOLOAD"):
+            # Don't autoload from setuptools entry point. Only explicitly specified
+            # plugins are going to be loaded.
+            self.pluginmanager.load_setuptools_entrypoints("pytest11")
+        self.pluginmanager.consider_env()
+        self.known_args_namespace = ns = self._parser.parse_known_args(
+            args, namespace=copy.copy(self.option)
+        )
+        if self.known_args_namespace.confcutdir is None and self.inifile:
+            confcutdir = py.path.local(self.inifile).dirname
+            self.known_args_namespace.confcutdir = confcutdir
+        try:
+            self.hook.pytest_load_initial_conftests(
+                early_config=self, args=args, parser=self._parser
+            )
+        except ConftestImportFailure:
+            e = sys.exc_info()[1]
+            if ns.help or ns.version:
+                # we don't want to prevent --help/--version to work
+                # so just let is pass and print a warning at the end
+                from _pytest.warnings import _issue_warning_captured
+
+                _issue_warning_captured(
+                    PytestConfigWarning(
+                        "could not load initial conftests: {}".format(e.path)
+                    ),
+                    self.hook,
+                    stacklevel=2,
+                )
+            else:
+                raise
+
+    def _checkversion(self):
+        import pytest
+
+        minver = self.inicfg.get("minversion", None)
+        if minver:
+            if Version(minver) > Version(pytest.__version__):
+                raise pytest.UsageError(
+                    "%s:%d: requires pytest-%s, actual pytest-%s'"
+                    % (
+                        self.inicfg.config.path,
+                        self.inicfg.lineof("minversion"),
+                        minver,
+                        pytest.__version__,
+                    )
+                )
+
+    def parse(self, args, addopts=True):
+        # parse given cmdline arguments into this config object.
+        assert not hasattr(
+            self, "args"
+        ), "can only parse cmdline args at most once per Config object"
+        self._origargs = args
+        self.hook.pytest_addhooks.call_historic(
+            kwargs=dict(pluginmanager=self.pluginmanager)
+        )
+        self._preparse(args, addopts=addopts)
+        # XXX deprecated hook:
+        self.hook.pytest_cmdline_preparse(config=self, args=args)
+        self._parser.after_preparse = True
+        try:
+            args = self._parser.parse_setoption(
+                args, self.option, namespace=self.option
+            )
+            if not args:
+                if self.invocation_dir == self.rootdir:
+                    args = self.getini("testpaths")
+                if not args:
+                    args = [str(self.invocation_dir)]
+            self.args = args
+        except PrintHelp:
+            pass
+
+    def addinivalue_line(self, name, line):
+        """ add a line to an ini-file option. The option must have been
+        declared but might not yet be set in which case the line becomes the
+        the first line in its value. """
+        x = self.getini(name)
+        assert isinstance(x, list)
+        x.append(line)  # modifies the cached list inline
+
+    def getini(self, name):
+        """ return configuration value from an :ref:`ini file <inifiles>`. If the
+        specified name hasn't been registered through a prior
+        :py:func:`parser.addini <_pytest.config.Parser.addini>`
+        call (usually from a plugin), a ValueError is raised. """
+        try:
+            return self._inicache[name]
+        except KeyError:
+            self._inicache[name] = val = self._getini(name)
+            return val
+
+    def _getini(self, name):
+        try:
+            description, type, default = self._parser._inidict[name]
+        except KeyError:
+            raise ValueError("unknown configuration value: %r" % (name,))
+        value = self._get_override_ini_value(name)
+        if value is None:
+            try:
+                value = self.inicfg[name]
+            except KeyError:
+                if default is not None:
+                    return default
+                if type is None:
+                    return ""
+                return []
+        if type == "pathlist":
+            dp = py.path.local(self.inicfg.config.path).dirpath()
+            values = []
+            for relpath in shlex.split(value):
+                values.append(dp.join(relpath, abs=True))
+            return values
+        elif type == "args":
+            return shlex.split(value)
+        elif type == "linelist":
+            return [t for t in map(lambda x: x.strip(), value.split("\n")) if t]
+        elif type == "bool":
+            return bool(_strtobool(value.strip()))
+        else:
+            assert type is None
+            return value
+
+    def _getconftest_pathlist(self, name, path):
+        try:
+            mod, relroots = self.pluginmanager._rget_with_confmod(name, path)
+        except KeyError:
+            return None
+        modpath = py.path.local(mod.__file__).dirpath()
+        values = []
+        for relroot in relroots:
+            if not isinstance(relroot, py.path.local):
+                relroot = relroot.replace("/", py.path.local.sep)
+                relroot = modpath.join(relroot, abs=True)
+            values.append(relroot)
+        return values
+
+    def _get_override_ini_value(self, name):
+        value = None
+        # override_ini is a list of "ini=value" options
+        # always use the last item if multiple values are set for same ini-name,
+        # e.g. -o foo=bar1 -o foo=bar2 will set foo to bar2
+        for ini_config in self._override_ini:
+            try:
+                key, user_ini_value = ini_config.split("=", 1)
+            except ValueError:
+                raise UsageError("-o/--override-ini expects option=value style.")
+            else:
+                if key == name:
+                    value = user_ini_value
+        return value
+
+    def getoption(self, name, default=notset, skip=False):
+        """ return command line option value.
+
+        :arg name: name of the option.  You may also specify
+            the literal ``--OPT`` option instead of the "dest" option name.
+        :arg default: default value if no option of that name exists.
+        :arg skip: if True raise pytest.skip if option does not exists
+            or has a None value.
+        """
+        name = self._opt2dest.get(name, name)
+        try:
+            val = getattr(self.option, name)
+            if val is None and skip:
+                raise AttributeError(name)
+            return val
+        except AttributeError:
+            if default is not notset:
+                return default
+            if skip:
+                import pytest
+
+                pytest.skip("no %r option found" % (name,))
+            raise ValueError("no option named %r" % (name,))
+
+    def getvalue(self, name, path=None):
+        """ (deprecated, use getoption()) """
+        return self.getoption(name)
+
+    def getvalueorskip(self, name, path=None):
+        """ (deprecated, use getoption(skip=True)) """
+        return self.getoption(name, skip=True)
+
+
+def _assertion_supported():
+    try:
+        assert False
+    except AssertionError:
+        return True
+    else:
+        return False
+
+
+def _warn_about_missing_assertion(mode):
+    if not _assertion_supported():
+        if mode == "plain":
+            sys.stderr.write(
+                "WARNING: ASSERTIONS ARE NOT EXECUTED"
+                " and FAILING TESTS WILL PASS.  Are you"
+                " using python -O?"
+            )
+        else:
+            sys.stderr.write(
+                "WARNING: assertions not in test modules or"
+                " plugins will be ignored"
+                " because assert statements are not executed "
+                "by the underlying Python interpreter "
+                "(are you using python -O?)\n"
+            )
+
+
+def setns(obj, dic):
+    import pytest
+
+    for name, value in dic.items():
+        if isinstance(value, dict):
+            mod = getattr(obj, name, None)
+            if mod is None:
+                modname = "pytest.%s" % name
+                mod = types.ModuleType(modname)
+                sys.modules[modname] = mod
+                mod.__all__ = []
+                setattr(obj, name, mod)
+            obj.__all__.append(name)
+            setns(mod, value)
+        else:
+            setattr(obj, name, value)
+            obj.__all__.append(name)
+            # if obj != pytest:
+            #    pytest.__all__.append(name)
+            setattr(pytest, name, value)
+
+
+def create_terminal_writer(config, *args, **kwargs):
+    """Create a TerminalWriter instance configured according to the options
+    in the config object. Every code which requires a TerminalWriter object
+    and has access to a config object should use this function.
+    """
+    tw = py.io.TerminalWriter(*args, **kwargs)
+    if config.option.color == "yes":
+        tw.hasmarkup = True
+    if config.option.color == "no":
+        tw.hasmarkup = False
+    return tw
+
+
+def _strtobool(val):
+    """Convert a string representation of truth to true (1) or false (0).
+
+    True values are 'y', 'yes', 't', 'true', 'on', and '1'; false values
+    are 'n', 'no', 'f', 'false', 'off', and '0'.  Raises ValueError if
+    'val' is anything else.
+
+    .. note:: copied from distutils.util
+    """
+    val = val.lower()
+    if val in ("y", "yes", "t", "true", "on", "1"):
+        return 1
+    elif val in ("n", "no", "f", "false", "off", "0"):
+        return 0
+    else:
+        raise ValueError("invalid truth value %r" % (val,))
diff --git a/contrib/python/pytest/py2/_pytest/config/argparsing.py b/contrib/python/pytest/py2/_pytest/config/argparsing.py
new file mode 100644
index 0000000000..37fb772db9
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/config/argparsing.py
@@ -0,0 +1,410 @@
+# -*- coding: utf-8 -*-
+import argparse
+import warnings
+
+import py
+import six
+
+from _pytest.config.exceptions import UsageError
+
+FILE_OR_DIR = "file_or_dir"
+
+
+class Parser(object):
+    """ Parser for command line arguments and ini-file values.
+
+    :ivar extra_info: dict of generic param -> value to display in case
+        there's an error processing the command line arguments.
+    """
+
+    prog = None
+
+    def __init__(self, usage=None, processopt=None):
+        self._anonymous = OptionGroup("custom options", parser=self)
+        self._groups = []
+        self._processopt = processopt
+        self._usage = usage
+        self._inidict = {}
+        self._ininames = []
+        self.extra_info = {}
+
+    def processoption(self, option):
+        if self._processopt:
+            if option.dest:
+                self._processopt(option)
+
+    def getgroup(self, name, description="", after=None):
+        """ get (or create) a named option Group.
+
+        :name: name of the option group.
+        :description: long description for --help output.
+        :after: name of other group, used for ordering --help output.
+
+        The returned group object has an ``addoption`` method with the same
+        signature as :py:func:`parser.addoption
+        <_pytest.config.Parser.addoption>` but will be shown in the
+        respective group in the output of ``pytest. --help``.
+        """
+        for group in self._groups:
+            if group.name == name:
+                return group
+        group = OptionGroup(name, description, parser=self)
+        i = 0
+        for i, grp in enumerate(self._groups):
+            if grp.name == after:
+                break
+        self._groups.insert(i + 1, group)
+        return group
+
+    def addoption(self, *opts, **attrs):
+        """ register a command line option.
+
+        :opts: option names, can be short or long options.
+        :attrs: same attributes which the ``add_option()`` function of the
+           `argparse library
+           <http://docs.python.org/2/library/argparse.html>`_
+           accepts.
+
+        After command line parsing options are available on the pytest config
+        object via ``config.option.NAME`` where ``NAME`` is usually set
+        by passing a ``dest`` attribute, for example
+        ``addoption("--long", dest="NAME", ...)``.
+        """
+        self._anonymous.addoption(*opts, **attrs)
+
+    def parse(self, args, namespace=None):
+        from _pytest._argcomplete import try_argcomplete
+
+        self.optparser = self._getparser()
+        try_argcomplete(self.optparser)
+        args = [str(x) if isinstance(x, py.path.local) else x for x in args]
+        return self.optparser.parse_args(args, namespace=namespace)
+
+    def _getparser(self):
+        from _pytest._argcomplete import filescompleter
+
+        optparser = MyOptionParser(self, self.extra_info, prog=self.prog)
+        groups = self._groups + [self._anonymous]
+        for group in groups:
+            if group.options:
+                desc = group.description or group.name
+                arggroup = optparser.add_argument_group(desc)
+                for option in group.options:
+                    n = option.names()
+                    a = option.attrs()
+                    arggroup.add_argument(*n, **a)
+        # bash like autocompletion for dirs (appending '/')
+        optparser.add_argument(FILE_OR_DIR, nargs="*").completer = filescompleter
+        return optparser
+
+    def parse_setoption(self, args, option, namespace=None):
+        parsedoption = self.parse(args, namespace=namespace)
+        for name, value in parsedoption.__dict__.items():
+            setattr(option, name, value)
+        return getattr(parsedoption, FILE_OR_DIR)
+
+    def parse_known_args(self, args, namespace=None):
+        """parses and returns a namespace object with known arguments at this
+        point.
+        """
+        return self.parse_known_and_unknown_args(args, namespace=namespace)[0]
+
+    def parse_known_and_unknown_args(self, args, namespace=None):
+        """parses and returns a namespace object with known arguments, and
+        the remaining arguments unknown at this point.
+        """
+        optparser = self._getparser()
+        args = [str(x) if isinstance(x, py.path.local) else x for x in args]
+        return optparser.parse_known_args(args, namespace=namespace)
+
+    def addini(self, name, help, type=None, default=None):
+        """ register an ini-file option.
+
+        :name: name of the ini-variable
+        :type: type of the variable, can be ``pathlist``, ``args``, ``linelist``
+               or ``bool``.
+        :default: default value if no ini-file option exists but is queried.
+
+        The value of ini-variables can be retrieved via a call to
+        :py:func:`config.getini(name) <_pytest.config.Config.getini>`.
+        """
+        assert type in (None, "pathlist", "args", "linelist", "bool")
+        self._inidict[name] = (help, type, default)
+        self._ininames.append(name)
+
+
+class ArgumentError(Exception):
+    """
+    Raised if an Argument instance is created with invalid or
+    inconsistent arguments.
+    """
+
+    def __init__(self, msg, option):
+        self.msg = msg
+        self.option_id = str(option)
+
+    def __str__(self):
+        if self.option_id:
+            return "option %s: %s" % (self.option_id, self.msg)
+        else:
+            return self.msg
+
+
+class Argument(object):
+    """class that mimics the necessary behaviour of optparse.Option
+
+    it's currently a least effort implementation
+    and ignoring choices and integer prefixes
+    https://docs.python.org/3/library/optparse.html#optparse-standard-option-types
+    """
+
+    _typ_map = {"int": int, "string": str, "float": float, "complex": complex}
+
+    def __init__(self, *names, **attrs):
+        """store parms in private vars for use in add_argument"""
+        self._attrs = attrs
+        self._short_opts = []
+        self._long_opts = []
+        self.dest = attrs.get("dest")
+        if "%default" in (attrs.get("help") or ""):
+            warnings.warn(
+                'pytest now uses argparse. "%default" should be'
+                ' changed to "%(default)s" ',
+                DeprecationWarning,
+                stacklevel=3,
+            )
+        try:
+            typ = attrs["type"]
+        except KeyError:
+            pass
+        else:
+            # this might raise a keyerror as well, don't want to catch that
+            if isinstance(typ, six.string_types):
+                if typ == "choice":
+                    warnings.warn(
+                        "`type` argument to addoption() is the string %r."
+                        " For choices this is optional and can be omitted, "
+                        " but when supplied should be a type (for example `str` or `int`)."
+                        " (options: %s)" % (typ, names),
+                        DeprecationWarning,
+                        stacklevel=4,
+                    )
+                    # argparse expects a type here take it from
+                    # the type of the first element
+                    attrs["type"] = type(attrs["choices"][0])
+                else:
+                    warnings.warn(
+                        "`type` argument to addoption() is the string %r, "
+                        " but when supplied should be a type (for example `str` or `int`)."
+                        " (options: %s)" % (typ, names),
+                        DeprecationWarning,
+                        stacklevel=4,
+                    )
+                    attrs["type"] = Argument._typ_map[typ]
+                # used in test_parseopt -> test_parse_defaultgetter
+                self.type = attrs["type"]
+            else:
+                self.type = typ
+        try:
+            # attribute existence is tested in Config._processopt
+            self.default = attrs["default"]
+        except KeyError:
+            pass
+        self._set_opt_strings(names)
+        if not self.dest:
+            if self._long_opts:
+                self.dest = self._long_opts[0][2:].replace("-", "_")
+            else:
+                try:
+                    self.dest = self._short_opts[0][1:]
+                except IndexError:
+                    raise ArgumentError("need a long or short option", self)
+
+    def names(self):
+        return self._short_opts + self._long_opts
+
+    def attrs(self):
+        # update any attributes set by processopt
+        attrs = "default dest help".split()
+        if self.dest:
+            attrs.append(self.dest)
+        for attr in attrs:
+            try:
+                self._attrs[attr] = getattr(self, attr)
+            except AttributeError:
+                pass
+        if self._attrs.get("help"):
+            a = self._attrs["help"]
+            a = a.replace("%default", "%(default)s")
+            # a = a.replace('%prog', '%(prog)s')
+            self._attrs["help"] = a
+        return self._attrs
+
+    def _set_opt_strings(self, opts):
+        """directly from optparse
+
+        might not be necessary as this is passed to argparse later on"""
+        for opt in opts:
+            if len(opt) < 2:
+                raise ArgumentError(
+                    "invalid option string %r: "
+                    "must be at least two characters long" % opt,
+                    self,
+                )
+            elif len(opt) == 2:
+                if not (opt[0] == "-" and opt[1] != "-"):
+                    raise ArgumentError(
+                        "invalid short option string %r: "
+                        "must be of the form -x, (x any non-dash char)" % opt,
+                        self,
+                    )
+                self._short_opts.append(opt)
+            else:
+                if not (opt[0:2] == "--" and opt[2] != "-"):
+                    raise ArgumentError(
+                        "invalid long option string %r: "
+                        "must start with --, followed by non-dash" % opt,
+                        self,
+                    )
+                self._long_opts.append(opt)
+
+    def __repr__(self):
+        args = []
+        if self._short_opts:
+            args += ["_short_opts: " + repr(self._short_opts)]
+        if self._long_opts:
+            args += ["_long_opts: " + repr(self._long_opts)]
+        args += ["dest: " + repr(self.dest)]
+        if hasattr(self, "type"):
+            args += ["type: " + repr(self.type)]
+        if hasattr(self, "default"):
+            args += ["default: " + repr(self.default)]
+        return "Argument({})".format(", ".join(args))
+
+
+class OptionGroup(object):
+    def __init__(self, name, description="", parser=None):
+        self.name = name
+        self.description = description
+        self.options = []
+        self.parser = parser
+
+    def addoption(self, *optnames, **attrs):
+        """ add an option to this group.
+
+        if a shortened version of a long option is specified it will
+        be suppressed in the help. addoption('--twowords', '--two-words')
+        results in help showing '--two-words' only, but --twowords gets
+        accepted **and** the automatic destination is in args.twowords
+        """
+        conflict = set(optnames).intersection(
+            name for opt in self.options for name in opt.names()
+        )
+        if conflict:
+            raise ValueError("option names %s already added" % conflict)
+        option = Argument(*optnames, **attrs)
+        self._addoption_instance(option, shortupper=False)
+
+    def _addoption(self, *optnames, **attrs):
+        option = Argument(*optnames, **attrs)
+        self._addoption_instance(option, shortupper=True)
+
+    def _addoption_instance(self, option, shortupper=False):
+        if not shortupper:
+            for opt in option._short_opts:
+                if opt[0] == "-" and opt[1].islower():
+                    raise ValueError("lowercase shortoptions reserved")
+        if self.parser:
+            self.parser.processoption(option)
+        self.options.append(option)
+
+
+class MyOptionParser(argparse.ArgumentParser):
+    def __init__(self, parser, extra_info=None, prog=None):
+        if not extra_info:
+            extra_info = {}
+        self._parser = parser
+        argparse.ArgumentParser.__init__(
+            self,
+            prog=prog,
+            usage=parser._usage,
+            add_help=False,
+            formatter_class=DropShorterLongHelpFormatter,
+        )
+        # extra_info is a dict of (param -> value) to display if there's
+        # an usage error to provide more contextual information to the user
+        self.extra_info = extra_info
+
+    def error(self, message):
+        """Transform argparse error message into UsageError."""
+        msg = "%s: error: %s" % (self.prog, message)
+
+        if hasattr(self._parser, "_config_source_hint"):
+            msg = "%s (%s)" % (msg, self._parser._config_source_hint)
+
+        raise UsageError(self.format_usage() + msg)
+
+    def parse_args(self, args=None, namespace=None):
+        """allow splitting of positional arguments"""
+        args, argv = self.parse_known_args(args, namespace)
+        if argv:
+            for arg in argv:
+                if arg and arg[0] == "-":
+                    lines = ["unrecognized arguments: %s" % (" ".join(argv))]
+                    for k, v in sorted(self.extra_info.items()):
+                        lines.append("  %s: %s" % (k, v))
+                    self.error("\n".join(lines))
+            getattr(args, FILE_OR_DIR).extend(argv)
+        return args
+
+
+class DropShorterLongHelpFormatter(argparse.HelpFormatter):
+    """shorten help for long options that differ only in extra hyphens
+
+    - collapse **long** options that are the same except for extra hyphens
+    - special action attribute map_long_option allows surpressing additional
+      long options
+    - shortcut if there are only two options and one of them is a short one
+    - cache result on action object as this is called at least 2 times
+    """
+
+    def _format_action_invocation(self, action):
+        orgstr = argparse.HelpFormatter._format_action_invocation(self, action)
+        if orgstr and orgstr[0] != "-":  # only optional arguments
+            return orgstr
+        res = getattr(action, "_formatted_action_invocation", None)
+        if res:
+            return res
+        options = orgstr.split(", ")
+        if len(options) == 2 and (len(options[0]) == 2 or len(options[1]) == 2):
+            # a shortcut for '-h, --help' or '--abc', '-a'
+            action._formatted_action_invocation = orgstr
+            return orgstr
+        return_list = []
+        option_map = getattr(action, "map_long_option", {})
+        if option_map is None:
+            option_map = {}
+        short_long = {}
+        for option in options:
+            if len(option) == 2 or option[2] == " ":
+                continue
+            if not option.startswith("--"):
+                raise ArgumentError(
+                    'long optional argument without "--": [%s]' % (option), self
+                )
+            xxoption = option[2:]
+            if xxoption.split()[0] not in option_map:
+                shortened = xxoption.replace("-", "")
+                if shortened not in short_long or len(short_long[shortened]) < len(
+                    xxoption
+                ):
+                    short_long[shortened] = xxoption
+        # now short_long has been filled out to the longest with dashes
+        # **and** we keep the right option ordering from add_argument
+        for option in options:
+            if len(option) == 2 or option[2] == " ":
+                return_list.append(option)
+            if option[2:] == short_long.get(option.replace("-", "")):
+                return_list.append(option.replace(" ", "=", 1))
+        action._formatted_action_invocation = ", ".join(return_list)
+        return action._formatted_action_invocation
diff --git a/contrib/python/pytest/py2/_pytest/config/exceptions.py b/contrib/python/pytest/py2/_pytest/config/exceptions.py
new file mode 100644
index 0000000000..bf58fde5db
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/config/exceptions.py
@@ -0,0 +1,10 @@
+# -*- coding: utf-8 -*-
+class UsageError(Exception):
+    """ error in pytest usage or invocation"""
+
+
+class PrintHelp(Exception):
+    """Raised when pytest should print it's help to skip the rest of the
+    argument parsing and validation."""
+
+    pass
diff --git a/contrib/python/pytest/py2/_pytest/config/findpaths.py b/contrib/python/pytest/py2/_pytest/config/findpaths.py
new file mode 100644
index 0000000000..e6779b289b
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/config/findpaths.py
@@ -0,0 +1,153 @@
+# -*- coding: utf-8 -*-
+import os
+
+import py
+
+from .exceptions import UsageError
+from _pytest.outcomes import fail
+
+
+def exists(path, ignore=EnvironmentError):
+    try:
+        return path.check()
+    except ignore:
+        return False
+
+
+def getcfg(args, config=None):
+    """
+    Search the list of arguments for a valid ini-file for pytest,
+    and return a tuple of (rootdir, inifile, cfg-dict).
+
+    note: config is optional and used only to issue warnings explicitly (#2891).
+    """
+    from _pytest.deprecated import CFG_PYTEST_SECTION
+
+    inibasenames = ["pytest.ini", "tox.ini", "setup.cfg"]
+    args = [x for x in args if not str(x).startswith("-")]
+    if not args:
+        args = [py.path.local()]
+    for arg in args:
+        arg = py.path.local(arg)
+        for base in arg.parts(reverse=True):
+            for inibasename in inibasenames:
+                p = base.join(inibasename)
+                if exists(p):
+                    try:
+                        iniconfig = py.iniconfig.IniConfig(p)
+                    except py.iniconfig.ParseError as exc:
+                        raise UsageError(str(exc))
+
+                    if (
+                        inibasename == "setup.cfg"
+                        and "tool:pytest" in iniconfig.sections
+                    ):
+                        return base, p, iniconfig["tool:pytest"]
+                    elif "pytest" in iniconfig.sections:
+                        if inibasename == "setup.cfg" and config is not None:
+
+                            fail(
+                                CFG_PYTEST_SECTION.format(filename=inibasename),
+                                pytrace=False,
+                            )
+                        return base, p, iniconfig["pytest"]
+                    elif inibasename == "pytest.ini":
+                        # allowed to be empty
+                        return base, p, {}
+    return None, None, None
+
+
+def get_common_ancestor(paths):
+    common_ancestor = None
+    for path in paths:
+        if not path.exists():
+            continue
+        if common_ancestor is None:
+            common_ancestor = path
+        else:
+            if path.relto(common_ancestor) or path == common_ancestor:
+                continue
+            elif common_ancestor.relto(path):
+                common_ancestor = path
+            else:
+                shared = path.common(common_ancestor)
+                if shared is not None:
+                    common_ancestor = shared
+    if common_ancestor is None:
+        common_ancestor = py.path.local()
+    elif common_ancestor.isfile():
+        common_ancestor = common_ancestor.dirpath()
+    return common_ancestor
+
+
+def get_dirs_from_args(args):
+    def is_option(x):
+        return str(x).startswith("-")
+
+    def get_file_part_from_node_id(x):
+        return str(x).split("::")[0]
+
+    def get_dir_from_path(path):
+        if path.isdir():
+            return path
+        return py.path.local(path.dirname)
+
+    # These look like paths but may not exist
+    possible_paths = (
+        py.path.local(get_file_part_from_node_id(arg))
+        for arg in args
+        if not is_option(arg)
+    )
+
+    return [get_dir_from_path(path) for path in possible_paths if path.exists()]
+
+
+def determine_setup(inifile, args, rootdir_cmd_arg=None, config=None):
+    dirs = get_dirs_from_args(args)
+    if inifile:
+        iniconfig = py.iniconfig.IniConfig(inifile)
+        is_cfg_file = str(inifile).endswith(".cfg")
+        sections = ["tool:pytest", "pytest"] if is_cfg_file else ["pytest"]
+        for section in sections:
+            try:
+                inicfg = iniconfig[section]
+                if is_cfg_file and section == "pytest" and config is not None:
+                    from _pytest.deprecated import CFG_PYTEST_SECTION
+
+                    fail(
+                        CFG_PYTEST_SECTION.format(filename=str(inifile)), pytrace=False
+                    )
+                break
+            except KeyError:
+                inicfg = None
+        if rootdir_cmd_arg is None:
+            rootdir = get_common_ancestor(dirs)
+    else:
+        ancestor = get_common_ancestor(dirs)
+        rootdir, inifile, inicfg = getcfg([ancestor], config=config)
+        if rootdir is None and rootdir_cmd_arg is None:
+            for possible_rootdir in ancestor.parts(reverse=True):
+                if possible_rootdir.join("setup.py").exists():
+                    rootdir = possible_rootdir
+                    break
+            else:
+                if dirs != [ancestor]:
+                    rootdir, inifile, inicfg = getcfg(dirs, config=config)
+                if rootdir is None:
+                    if config is not None:
+                        cwd = config.invocation_dir
+                    else:
+                        cwd = py.path.local()
+                    rootdir = get_common_ancestor([cwd, ancestor])
+                    is_fs_root = os.path.splitdrive(str(rootdir))[1] == "/"
+                    if is_fs_root:
+                        rootdir = ancestor
+    if rootdir_cmd_arg:
+        rootdir = py.path.local(os.path.expandvars(rootdir_cmd_arg))
+        if not rootdir.isdir():
+            raise UsageError(
+                "Directory '{}' not found. Check your '--rootdir' option.".format(
+                    rootdir
+                )
+            )
+    return rootdir, inifile, inicfg or {}
diff --git a/contrib/python/pytest/py2/_pytest/debugging.py b/contrib/python/pytest/py2/_pytest/debugging.py
new file mode 100644
index 0000000000..bc114c8683
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/debugging.py
@@ -0,0 +1,373 @@
+# -*- coding: utf-8 -*-
+""" interactive debugging with PDB, the Python Debugger. """
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import os
+import argparse
+import pdb
+import sys
+from doctest import UnexpectedException
+
+from _pytest import outcomes
+from _pytest.config import hookimpl
+from _pytest.config.exceptions import UsageError
+
+
+def import_readline():
+    try:
+        import readline
+    except ImportError:
+        sys.path.append('/usr/lib/python2.7/lib-dynload')
+
+    try:
+        import readline
+    except ImportError as e:
+        print('can not import readline:', e)
+
+        import subprocess
+        try:
+            subprocess.check_call('stty icrnl'.split())
+        except OSError as e:
+            print('can not restore Enter, use Control+J:', e)
+
+
+def tty():
+    if os.isatty(1):
+        return
+
+    fd = os.open('/dev/tty', os.O_RDWR)
+    os.dup2(fd, 0)
+    os.dup2(fd, 1)
+    os.dup2(fd, 2)
+    os.close(fd)
+
+    old_sys_path = sys.path
+    sys.path = list(sys.path)
+    try:
+        import_readline()
+    finally:
+        sys.path = old_sys_path
+
+
+def _validate_usepdb_cls(value):
+    """Validate syntax of --pdbcls option."""
+    try:
+        modname, classname = value.split(":")
+    except ValueError:
+        raise argparse.ArgumentTypeError(
+            "{!r} is not in the format 'modname:classname'".format(value)
+        )
+    return (modname, classname)
+
+
+def pytest_addoption(parser):
+    group = parser.getgroup("general")
+    group._addoption(
+        "--pdb",
+        dest="usepdb",
+        action="store_true",
+        help="start the interactive Python debugger on errors or KeyboardInterrupt.",
+    )
+    group._addoption(
+        "--pdbcls",
+        dest="usepdb_cls",
+        metavar="modulename:classname",
+        type=_validate_usepdb_cls,
+        help="start a custom interactive Python debugger on errors. "
+        "For example: --pdbcls=IPython.terminal.debugger:TerminalPdb",
+    )
+    group._addoption(
+        "--trace",
+        dest="trace",
+        action="store_true",
+        help="Immediately break when running each test.",
+    )
+
+
+def pytest_configure(config):
+    if config.getvalue("trace"):
+        config.pluginmanager.register(PdbTrace(), "pdbtrace")
+    if config.getvalue("usepdb"):
+        config.pluginmanager.register(PdbInvoke(), "pdbinvoke")
+
+    pytestPDB._saved.append(
+        (pdb.set_trace, pytestPDB._pluginmanager, pytestPDB._config)
+    )
+    pdb.set_trace = pytestPDB.set_trace
+    pytestPDB._pluginmanager = config.pluginmanager
+    pytestPDB._config = config
+
+    # NOTE: not using pytest_unconfigure, since it might get called although
+    #       pytest_configure was not (if another plugin raises UsageError).
+    def fin():
+        (
+            pdb.set_trace,
+            pytestPDB._pluginmanager,
+            pytestPDB._config,
+        ) = pytestPDB._saved.pop()
+
+    config._cleanup.append(fin)
+
+
+class pytestPDB(object):
+    """ Pseudo PDB that defers to the real pdb. """
+
+    _pluginmanager = None
+    _config = None
+    _saved = []
+    _recursive_debug = 0
+    _wrapped_pdb_cls = None
+
+    @classmethod
+    def _is_capturing(cls, capman):
+        if capman:
+            return capman.is_capturing()
+        return False
+
+    @classmethod
+    def _import_pdb_cls(cls, capman):
+        if not cls._config:
+            # Happens when using pytest.set_trace outside of a test.
+            return pdb.Pdb
+
+        usepdb_cls = cls._config.getvalue("usepdb_cls")
+
+        if cls._wrapped_pdb_cls and cls._wrapped_pdb_cls[0] == usepdb_cls:
+            return cls._wrapped_pdb_cls[1]
+
+        if usepdb_cls:
+            modname, classname = usepdb_cls
+
+            try:
+                __import__(modname)
+                mod = sys.modules[modname]
+
+                # Handle --pdbcls=pdb:pdb.Pdb (useful e.g. with pdbpp).
+                parts = classname.split(".")
+                pdb_cls = getattr(mod, parts[0])
+                for part in parts[1:]:
+                    pdb_cls = getattr(pdb_cls, part)
+            except Exception as exc:
+                value = ":".join((modname, classname))
+                raise UsageError(
+                    "--pdbcls: could not import {!r}: {}".format(value, exc)
+                )
+        else:
+            pdb_cls = pdb.Pdb
+
+        wrapped_cls = cls._get_pdb_wrapper_class(pdb_cls, capman)
+        cls._wrapped_pdb_cls = (usepdb_cls, wrapped_cls)
+        return wrapped_cls
+
+    @classmethod
+    def _get_pdb_wrapper_class(cls, pdb_cls, capman):
+        import _pytest.config
+
+        class PytestPdbWrapper(pdb_cls, object):
+            _pytest_capman = capman
+            _continued = False
+
+            def do_debug(self, arg):
+                cls._recursive_debug += 1
+                ret = super(PytestPdbWrapper, self).do_debug(arg)
+                cls._recursive_debug -= 1
+                return ret
+
+            def do_continue(self, arg):
+                ret = super(PytestPdbWrapper, self).do_continue(arg)
+                if cls._recursive_debug == 0:
+                    tw = _pytest.config.create_terminal_writer(cls._config)
+                    tw.line()
+
+                    capman = self._pytest_capman
+                    capturing = pytestPDB._is_capturing(capman)
+                    if capturing:
+                        if capturing == "global":
+                            tw.sep(">", "PDB continue (IO-capturing resumed)")
+                        else:
+                            tw.sep(
+                                ">",
+                                "PDB continue (IO-capturing resumed for %s)"
+                                % capturing,
+                            )
+                        capman.resume()
+                    else:
+                        tw.sep(">", "PDB continue")
+                cls._pluginmanager.hook.pytest_leave_pdb(config=cls._config, pdb=self)
+                self._continued = True
+                return ret
+
+            do_c = do_cont = do_continue
+
+            def do_quit(self, arg):
+                """Raise Exit outcome when quit command is used in pdb.
+
+                This is a bit of a hack - it would be better if BdbQuit
+                could be handled, but this would require to wrap the
+                whole pytest run, and adjust the report etc.
+                """
+                ret = super(PytestPdbWrapper, self).do_quit(arg)
+
+                if cls._recursive_debug == 0:
+                    outcomes.exit("Quitting debugger")
+
+                return ret
+
+            do_q = do_quit
+            do_exit = do_quit
+
+            def setup(self, f, tb):
+                """Suspend on setup().
+
+                Needed after do_continue resumed, and entering another
+                breakpoint again.
+                """
+                ret = super(PytestPdbWrapper, self).setup(f, tb)
+                if not ret and self._continued:
+                    # pdb.setup() returns True if the command wants to exit
+                    # from the interaction: do not suspend capturing then.
+                    if self._pytest_capman:
+                        self._pytest_capman.suspend_global_capture(in_=True)
+                return ret
+
+            def get_stack(self, f, t):
+                stack, i = super(PytestPdbWrapper, self).get_stack(f, t)
+                if f is None:
+                    # Find last non-hidden frame.
+                    i = max(0, len(stack) - 1)
+                    while i and stack[i][0].f_locals.get("__tracebackhide__", False):
+                        i -= 1
+                return stack, i
+
+        return PytestPdbWrapper
+
+    @classmethod
+    def _init_pdb(cls, method, *args, **kwargs):
+        """ Initialize PDB debugging, dropping any IO capturing. """
+        import _pytest.config
+
+        if cls._pluginmanager is not None:
+            capman = cls._pluginmanager.getplugin("capturemanager")
+        else:
+            capman = None
+        if capman:
+            capman.suspend(in_=True)
+
+        if cls._config:
+            tw = _pytest.config.create_terminal_writer(cls._config)
+            tw.line()
+
+            if cls._recursive_debug == 0:
+                # Handle header similar to pdb.set_trace in py37+.
+                header = kwargs.pop("header", None)
+                if header is not None:
+                    tw.sep(">", header)
+                else:
+                    capturing = cls._is_capturing(capman)
+                    if capturing == "global":
+                        tw.sep(">", "PDB %s (IO-capturing turned off)" % (method,))
+                    elif capturing:
+                        tw.sep(
+                            ">",
+                            "PDB %s (IO-capturing turned off for %s)"
+                            % (method, capturing),
+                        )
+                    else:
+                        tw.sep(">", "PDB %s" % (method,))
+
+        _pdb = cls._import_pdb_cls(capman)(**kwargs)
+
+        if cls._pluginmanager:
+            cls._pluginmanager.hook.pytest_enter_pdb(config=cls._config, pdb=_pdb)
+        return _pdb
+
+    @classmethod
+    def set_trace(cls, *args, **kwargs):
+        """Invoke debugging via ``Pdb.set_trace``, dropping any IO capturing."""
+        tty()
+        frame = sys._getframe().f_back
+        _pdb = cls._init_pdb("set_trace", *args, **kwargs)
+        _pdb.set_trace(frame)
+
+
+class PdbInvoke(object):
+    def pytest_exception_interact(self, node, call, report):
+        capman = node.config.pluginmanager.getplugin("capturemanager")
+        if capman:
+            capman.suspend_global_capture(in_=True)
+            out, err = capman.read_global_capture()
+            sys.stdout.write(out)
+            sys.stdout.write(err)
+        tty()
+        _enter_pdb(node, call.excinfo, report)
+
+    def pytest_internalerror(self, excrepr, excinfo):
+        tb = _postmortem_traceback(excinfo)
+        post_mortem(tb)
+
+
+class PdbTrace(object):
+    @hookimpl(hookwrapper=True)
+    def pytest_pyfunc_call(self, pyfuncitem):
+        _test_pytest_function(pyfuncitem)
+        yield
+
+
+def _test_pytest_function(pyfuncitem):
+    _pdb = pytestPDB._init_pdb("runcall")
+    testfunction = pyfuncitem.obj
+    pyfuncitem.obj = _pdb.runcall
+    if "func" in pyfuncitem._fixtureinfo.argnames:  # pragma: no branch
+        raise ValueError("--trace can't be used with a fixture named func!")
+    pyfuncitem.funcargs["func"] = testfunction
+    new_list = list(pyfuncitem._fixtureinfo.argnames)
+    new_list.append("func")
+    pyfuncitem._fixtureinfo.argnames = tuple(new_list)
+
+
+def _enter_pdb(node, excinfo, rep):
+    # XXX we re-use the TerminalReporter's terminalwriter
+    # because this seems to avoid some encoding related troubles
+    # for not completely clear reasons.
+    tw = node.config.pluginmanager.getplugin("terminalreporter")._tw
+    tw.line()
+
+    showcapture = node.config.option.showcapture
+
+    for sectionname, content in (
+        ("stdout", rep.capstdout),
+        ("stderr", rep.capstderr),
+        ("log", rep.caplog),
+    ):
+        if showcapture in (sectionname, "all") and content:
+            tw.sep(">", "captured " + sectionname)
+            if content[-1:] == "\n":
+                content = content[:-1]
+            tw.line(content)
+
+    tw.sep(">", "traceback")
+    rep.toterminal(tw)
+    tw.sep(">", "entering PDB")
+    tb = _postmortem_traceback(excinfo)
+    rep._pdbshown = True
+    post_mortem(tb)
+    return rep
+
+
+def _postmortem_traceback(excinfo):
+    if isinstance(excinfo.value, UnexpectedException):
+        # A doctest.UnexpectedException is not useful for post_mortem.
+        # Use the underlying exception instead:
+        return excinfo.value.exc_info[2]
+    else:
+        return excinfo._excinfo[2]
+
+
+def post_mortem(t):
+    p = pytestPDB._init_pdb("post_mortem")
+    p.reset()
+    p.interaction(None, t)
+    if p.quitting:
+        outcomes.exit("Quitting debugger")
diff --git a/contrib/python/pytest/py2/_pytest/deprecated.py b/contrib/python/pytest/py2/_pytest/deprecated.py
new file mode 100644
index 0000000000..12394aca3f
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/deprecated.py
@@ -0,0 +1,96 @@
+# -*- coding: utf-8 -*-
+"""
+This module contains deprecation messages and bits of code used elsewhere in the codebase
+that is planned to be removed in the next pytest release.
+
+Keeping it in a central location makes it easy to track what is deprecated and should
+be removed when the time comes.
+
+All constants defined in this module should be either PytestWarning instances or UnformattedWarning
+in case of warnings which need to format their messages.
+"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+from _pytest.warning_types import PytestDeprecationWarning
+from _pytest.warning_types import RemovedInPytest4Warning
+from _pytest.warning_types import UnformattedWarning
+
+YIELD_TESTS = "yield tests were removed in pytest 4.0 - {name} will be ignored"
+
+
+FIXTURE_FUNCTION_CALL = (
+    'Fixture "{name}" called directly. Fixtures are not meant to be called directly,\n'
+    "but are created automatically when test functions request them as parameters.\n"
+    "See https://docs.pytest.org/en/latest/fixture.html for more information about fixtures, and\n"
+    "https://docs.pytest.org/en/latest/deprecations.html#calling-fixtures-directly about how to update your code."
+)
+
+FIXTURE_NAMED_REQUEST = PytestDeprecationWarning(
+    "'request' is a reserved name for fixtures and will raise an error in future versions"
+)
+
+CFG_PYTEST_SECTION = "[pytest] section in {filename} files is no longer supported, change to [tool:pytest] instead."
+
+GETFUNCARGVALUE = RemovedInPytest4Warning(
+    "getfuncargvalue is deprecated, use getfixturevalue"
+)
+
+RAISES_MESSAGE_PARAMETER = PytestDeprecationWarning(
+    "The 'message' parameter is deprecated.\n"
+    "(did you mean to use `match='some regex'` to check the exception message?)\n"
+    "Please see:\n"
+    "  https://docs.pytest.org/en/4.6-maintenance/deprecations.html#message-parameter-of-pytest-raises"
+)
+
+RESULT_LOG = PytestDeprecationWarning(
+    "--result-log is deprecated and scheduled for removal in pytest 5.0.\n"
+    "See https://docs.pytest.org/en/latest/deprecations.html#result-log-result-log for more information."
+)
+
+RAISES_EXEC = PytestDeprecationWarning(
+    "raises(..., 'code(as_a_string)') is deprecated, use the context manager form or use `exec()` directly\n\n"
+    "See https://docs.pytest.org/en/latest/deprecations.html#raises-warns-exec"
+)
+WARNS_EXEC = PytestDeprecationWarning(
+    "warns(..., 'code(as_a_string)') is deprecated, use the context manager form or use `exec()` directly.\n\n"
+    "See https://docs.pytest.org/en/latest/deprecations.html#raises-warns-exec"
+)
+
+PYTEST_PLUGINS_FROM_NON_TOP_LEVEL_CONFTEST = (
+    "Defining 'pytest_plugins' in a non-top-level conftest is no longer supported "
+    "because it affects the entire directory tree in a non-explicit way.\n"
+    "  {}\n"
+    "Please move it to a top level conftest file at the rootdir:\n"
+    "  {}\n"
+    "For more information, visit:\n"
+    "  https://docs.pytest.org/en/latest/deprecations.html#pytest-plugins-in-non-top-level-conftest-files"
+)
+
+PYTEST_CONFIG_GLOBAL = PytestDeprecationWarning(
+    "the `pytest.config` global is deprecated.  Please use `request.config` "
+    "or `pytest_configure` (if you're a pytest plugin) instead."
+)
+
+PYTEST_ENSURETEMP = RemovedInPytest4Warning(
+    "pytest/tmpdir_factory.ensuretemp is deprecated, \n"
+    "please use the tmp_path fixture or tmp_path_factory.mktemp"
+)
+
+PYTEST_LOGWARNING = PytestDeprecationWarning(
+    "pytest_logwarning is deprecated, no longer being called, and will be removed soon\n"
+    "please use pytest_warning_captured instead"
+)
+
+PYTEST_WARNS_UNKNOWN_KWARGS = UnformattedWarning(
+    PytestDeprecationWarning,
+    "pytest.warns() got unexpected keyword arguments: {args!r}.\n"
+    "This will be an error in future versions.",
+)
+
+PYTEST_PARAM_UNKNOWN_KWARGS = UnformattedWarning(
+    PytestDeprecationWarning,
+    "pytest.param() got unexpected keyword arguments: {args!r}.\n"
+    "This will be an error in future versions.",
+)
diff --git a/contrib/python/pytest/py2/_pytest/doctest.py b/contrib/python/pytest/py2/_pytest/doctest.py
new file mode 100644
index 0000000000..659d24aeeb
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/doctest.py
@@ -0,0 +1,583 @@
+# -*- coding: utf-8 -*-
+""" discover and run doctests in modules and test files."""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import inspect
+import platform
+import sys
+import traceback
+import warnings
+from contextlib import contextmanager
+
+import pytest
+from _pytest._code.code import ExceptionInfo
+from _pytest._code.code import ReprFileLocation
+from _pytest._code.code import TerminalRepr
+from _pytest.compat import safe_getattr
+from _pytest.fixtures import FixtureRequest
+from _pytest.outcomes import Skipped
+from _pytest.warning_types import PytestWarning
+
+DOCTEST_REPORT_CHOICE_NONE = "none"
+DOCTEST_REPORT_CHOICE_CDIFF = "cdiff"
+DOCTEST_REPORT_CHOICE_NDIFF = "ndiff"
+DOCTEST_REPORT_CHOICE_UDIFF = "udiff"
+DOCTEST_REPORT_CHOICE_ONLY_FIRST_FAILURE = "only_first_failure"
+
+DOCTEST_REPORT_CHOICES = (
+    DOCTEST_REPORT_CHOICE_NONE,
+    DOCTEST_REPORT_CHOICE_CDIFF,
+    DOCTEST_REPORT_CHOICE_NDIFF,
+    DOCTEST_REPORT_CHOICE_UDIFF,
+    DOCTEST_REPORT_CHOICE_ONLY_FIRST_FAILURE,
+)
+
+# Lazy definition of runner class
+RUNNER_CLASS = None
+
+
+def pytest_addoption(parser):
+    parser.addini(
+        "doctest_optionflags",
+        "option flags for doctests",
+        type="args",
+        default=["ELLIPSIS"],
+    )
+    parser.addini(
+        "doctest_encoding", "encoding used for doctest files", default="utf-8"
+    )
+    group = parser.getgroup("collect")
+    group.addoption(
+        "--doctest-modules",
+        action="store_true",
+        default=False,
+        help="run doctests in all .py modules",
+        dest="doctestmodules",
+    )
+    group.addoption(
+        "--doctest-report",
+        type=str.lower,
+        default="udiff",
+        help="choose another output format for diffs on doctest failure",
+        choices=DOCTEST_REPORT_CHOICES,
+        dest="doctestreport",
+    )
+    group.addoption(
+        "--doctest-glob",
+        action="append",
+        default=[],
+        metavar="pat",
+        help="doctests file matching pattern, default: test*.txt",
+        dest="doctestglob",
+    )
+    group.addoption(
+        "--doctest-ignore-import-errors",
+        action="store_true",
+        default=False,
+        help="ignore doctest ImportErrors",
+        dest="doctest_ignore_import_errors",
+    )
+    group.addoption(
+        "--doctest-continue-on-failure",
+        action="store_true",
+        default=False,
+        help="for a given doctest, continue to run after the first failure",
+        dest="doctest_continue_on_failure",
+    )
+
+
+def pytest_collect_file(path, parent):
+    config = parent.config
+    if path.ext == ".py":
+        if config.option.doctestmodules and not _is_setup_py(config, path, parent):
+            return DoctestModule(path, parent)
+    elif _is_doctest(config, path, parent):
+        return DoctestTextfile(path, parent)
+
+
+def _is_setup_py(config, path, parent):
+    if path.basename != "setup.py":
+        return False
+    contents = path.read()
+    return "setuptools" in contents or "distutils" in contents
+
+
+def _is_doctest(config, path, parent):
+    if path.ext in (".txt", ".rst") and parent.session.isinitpath(path):
+        return True
+    globs = config.getoption("doctestglob") or ["test*.txt"]
+    for glob in globs:
+        if path.check(fnmatch=glob):
+            return True
+    return False
+
+
+class ReprFailDoctest(TerminalRepr):
+    def __init__(self, reprlocation_lines):
+        # List of (reprlocation, lines) tuples
+        self.reprlocation_lines = reprlocation_lines
+
+    def toterminal(self, tw):
+        for reprlocation, lines in self.reprlocation_lines:
+            for line in lines:
+                tw.line(line)
+            reprlocation.toterminal(tw)
+
+
+class MultipleDoctestFailures(Exception):
+    def __init__(self, failures):
+        super(MultipleDoctestFailures, self).__init__()
+        self.failures = failures
+
+
+def _init_runner_class():
+    import doctest
+
+    class PytestDoctestRunner(doctest.DebugRunner):
+        """
+        Runner to collect failures.  Note that the out variable in this case is
+        a list instead of a stdout-like object
+        """
+
+        def __init__(
+            self, checker=None, verbose=None, optionflags=0, continue_on_failure=True
+        ):
+            doctest.DebugRunner.__init__(
+                self, checker=checker, verbose=verbose, optionflags=optionflags
+            )
+            self.continue_on_failure = continue_on_failure
+
+        def report_failure(self, out, test, example, got):
+            failure = doctest.DocTestFailure(test, example, got)
+            if self.continue_on_failure:
+                out.append(failure)
+            else:
+                raise failure
+
+        def report_unexpected_exception(self, out, test, example, exc_info):
+            if isinstance(exc_info[1], Skipped):
+                raise exc_info[1]
+            failure = doctest.UnexpectedException(test, example, exc_info)
+            if self.continue_on_failure:
+                out.append(failure)
+            else:
+                raise failure
+
+    return PytestDoctestRunner
+
+
+def _get_runner(checker=None, verbose=None, optionflags=0, continue_on_failure=True):
+    # We need this in order to do a lazy import on doctest
+    global RUNNER_CLASS
+    if RUNNER_CLASS is None:
+        RUNNER_CLASS = _init_runner_class()
+    return RUNNER_CLASS(
+        checker=checker,
+        verbose=verbose,
+        optionflags=optionflags,
+        continue_on_failure=continue_on_failure,
+    )
+
+
+class DoctestItem(pytest.Item):
+    def __init__(self, name, parent, runner=None, dtest=None):
+        super(DoctestItem, self).__init__(name, parent)
+        self.runner = runner
+        self.dtest = dtest
+        self.obj = None
+        self.fixture_request = None
+
+    def setup(self):
+        if self.dtest is not None:
+            self.fixture_request = _setup_fixtures(self)
+            globs = dict(getfixture=self.fixture_request.getfixturevalue)
+            for name, value in self.fixture_request.getfixturevalue(
+                "doctest_namespace"
+            ).items():
+                globs[name] = value
+            self.dtest.globs.update(globs)
+
+    def runtest(self):
+        _check_all_skipped(self.dtest)
+        self._disable_output_capturing_for_darwin()
+        failures = []
+        self.runner.run(self.dtest, out=failures)
+        if failures:
+            raise MultipleDoctestFailures(failures)
+
+    def _disable_output_capturing_for_darwin(self):
+        """
+        Disable output capturing. Otherwise, stdout is lost to doctest (#985)
+        """
+        if platform.system() != "Darwin":
+            return
+        capman = self.config.pluginmanager.getplugin("capturemanager")
+        if capman:
+            capman.suspend_global_capture(in_=True)
+            out, err = capman.read_global_capture()
+            sys.stdout.write(out)
+            sys.stderr.write(err)
+
+    def repr_failure(self, excinfo):
+        import doctest
+
+        failures = None
+        if excinfo.errisinstance((doctest.DocTestFailure, doctest.UnexpectedException)):
+            failures = [excinfo.value]
+        elif excinfo.errisinstance(MultipleDoctestFailures):
+            failures = excinfo.value.failures
+
+        if failures is not None:
+            reprlocation_lines = []
+            for failure in failures:
+                example = failure.example
+                test = failure.test
+                filename = test.filename
+                if test.lineno is None:
+                    lineno = None
+                else:
+                    lineno = test.lineno + example.lineno + 1
+                message = type(failure).__name__
+                reprlocation = ReprFileLocation(filename, lineno, message)
+                checker = _get_checker()
+                report_choice = _get_report_choice(
+                    self.config.getoption("doctestreport")
+                )
+                if lineno is not None:
+                    lines = failure.test.docstring.splitlines(False)
+                    # add line numbers to the left of the error message
+                    lines = [
+                        "%03d %s" % (i + test.lineno + 1, x)
+                        for (i, x) in enumerate(lines)
+                    ]
+                    # trim docstring error lines to 10
+                    lines = lines[max(example.lineno - 9, 0) : example.lineno + 1]
+                else:
+                    lines = [
+                        "EXAMPLE LOCATION UNKNOWN, not showing all tests of that example"
+                    ]
+                    indent = ">>>"
+                    for line in example.source.splitlines():
+                        lines.append("??? %s %s" % (indent, line))
+                        indent = "..."
+                if isinstance(failure, doctest.DocTestFailure):
+                    lines += checker.output_difference(
+                        example, failure.got, report_choice
+                    ).split("\n")
+                else:
+                    inner_excinfo = ExceptionInfo(failure.exc_info)
+                    lines += ["UNEXPECTED EXCEPTION: %s" % repr(inner_excinfo.value)]
+                    lines += traceback.format_exception(*failure.exc_info)
+                reprlocation_lines.append((reprlocation, lines))
+            return ReprFailDoctest(reprlocation_lines)
+        else:
+            return super(DoctestItem, self).repr_failure(excinfo)
+
+    def reportinfo(self):
+        return self.fspath, self.dtest.lineno, "[doctest] %s" % self.name
+
+
+def _get_flag_lookup():
+    import doctest
+
+    return dict(
+        DONT_ACCEPT_TRUE_FOR_1=doctest.DONT_ACCEPT_TRUE_FOR_1,
+        DONT_ACCEPT_BLANKLINE=doctest.DONT_ACCEPT_BLANKLINE,
+        NORMALIZE_WHITESPACE=doctest.NORMALIZE_WHITESPACE,
+        ELLIPSIS=doctest.ELLIPSIS,
+        IGNORE_EXCEPTION_DETAIL=doctest.IGNORE_EXCEPTION_DETAIL,
+        COMPARISON_FLAGS=doctest.COMPARISON_FLAGS,
+        ALLOW_UNICODE=_get_allow_unicode_flag(),
+        ALLOW_BYTES=_get_allow_bytes_flag(),
+    )
+
+
+def get_optionflags(parent):
+    optionflags_str = parent.config.getini("doctest_optionflags")
+    flag_lookup_table = _get_flag_lookup()
+    flag_acc = 0
+    for flag in optionflags_str:
+        flag_acc |= flag_lookup_table[flag]
+    return flag_acc
+
+
+def _get_continue_on_failure(config):
+    continue_on_failure = config.getvalue("doctest_continue_on_failure")
+    if continue_on_failure:
+        # We need to turn off this if we use pdb since we should stop at
+        # the first failure
+        if config.getvalue("usepdb"):
+            continue_on_failure = False
+    return continue_on_failure
+
+
+class DoctestTextfile(pytest.Module):
+    obj = None
+
+    def collect(self):
+        import doctest
+
+        # inspired by doctest.testfile; ideally we would use it directly,
+        # but it doesn't support passing a custom checker
+        encoding = self.config.getini("doctest_encoding")
+        text = self.fspath.read_text(encoding)
+        filename = str(self.fspath)
+        name = self.fspath.basename
+        globs = {"__name__": "__main__"}
+
+        optionflags = get_optionflags(self)
+
+        runner = _get_runner(
+            verbose=0,
+            optionflags=optionflags,
+            checker=_get_checker(),
+            continue_on_failure=_get_continue_on_failure(self.config),
+        )
+        _fix_spoof_python2(runner, encoding)
+
+        parser = doctest.DocTestParser()
+        test = parser.get_doctest(text, globs, name, filename, 0)
+        if test.examples:
+            yield DoctestItem(test.name, self, runner, test)
+
+
+def _check_all_skipped(test):
+    """raises pytest.skip() if all examples in the given DocTest have the SKIP
+    option set.
+    """
+    import doctest
+
+    all_skipped = all(x.options.get(doctest.SKIP, False) for x in test.examples)
+    if all_skipped:
+        pytest.skip("all tests skipped by +SKIP option")
+
+
+def _is_mocked(obj):
+    """
+    returns if a object is possibly a mock object by checking the existence of a highly improbable attribute
+    """
+    return (
+        safe_getattr(obj, "pytest_mock_example_attribute_that_shouldnt_exist", None)
+        is not None
+    )
+
+
+@contextmanager
+def _patch_unwrap_mock_aware():
+    """
+    contextmanager which replaces ``inspect.unwrap`` with a version
+    that's aware of mock objects and doesn't recurse on them
+    """
+    real_unwrap = getattr(inspect, "unwrap", None)
+    if real_unwrap is None:
+        yield
+    else:
+
+        def _mock_aware_unwrap(obj, stop=None):
+            try:
+                if stop is None or stop is _is_mocked:
+                    return real_unwrap(obj, stop=_is_mocked)
+                return real_unwrap(obj, stop=lambda obj: _is_mocked(obj) or stop(obj))
+            except Exception as e:
+                warnings.warn(
+                    "Got %r when unwrapping %r.  This is usually caused "
+                    "by a violation of Python's object protocol; see e.g. "
+                    "https://github.com/pytest-dev/pytest/issues/5080" % (e, obj),
+                    PytestWarning,
+                )
+                raise
+
+        inspect.unwrap = _mock_aware_unwrap
+        try:
+            yield
+        finally:
+            inspect.unwrap = real_unwrap
+
+
+class DoctestModule(pytest.Module):
+    def collect(self):
+        import doctest
+
+        class MockAwareDocTestFinder(doctest.DocTestFinder):
+            """
+            a hackish doctest finder that overrides stdlib internals to fix a stdlib bug
+
+            https://github.com/pytest-dev/pytest/issues/3456
+            https://bugs.python.org/issue25532
+            """
+
+            def _find(self, tests, obj, name, module, source_lines, globs, seen):
+                if _is_mocked(obj):
+                    return
+                with _patch_unwrap_mock_aware():
+
+                    doctest.DocTestFinder._find(
+                        self, tests, obj, name, module, source_lines, globs, seen
+                    )
+
+        if self.fspath.basename == "conftest.py":
+            module = self.config.pluginmanager._importconftest(self.fspath)
+        else:
+            try:
+                module = self.fspath.pyimport()
+            except ImportError:
+                if self.config.getvalue("doctest_ignore_import_errors"):
+                    pytest.skip("unable to import module %r" % self.fspath)
+                else:
+                    raise
+        # uses internal doctest module parsing mechanism
+        finder = MockAwareDocTestFinder()
+        optionflags = get_optionflags(self)
+        runner = _get_runner(
+            verbose=0,
+            optionflags=optionflags,
+            checker=_get_checker(),
+            continue_on_failure=_get_continue_on_failure(self.config),
+        )
+
+        for test in finder.find(module, module.__name__):
+            if test.examples:  # skip empty doctests
+                yield DoctestItem(test.name, self, runner, test)
+
+
+def _setup_fixtures(doctest_item):
+    """
+    Used by DoctestTextfile and DoctestItem to setup fixture information.
+    """
+
+    def func():
+        pass
+
+    doctest_item.funcargs = {}
+    fm = doctest_item.session._fixturemanager
+    doctest_item._fixtureinfo = fm.getfixtureinfo(
+        node=doctest_item, func=func, cls=None, funcargs=False
+    )
+    fixture_request = FixtureRequest(doctest_item)
+    fixture_request._fillfixtures()
+    return fixture_request
+
+
+def _get_checker():
+    """
+    Returns a doctest.OutputChecker subclass that takes in account the
+    ALLOW_UNICODE option to ignore u'' prefixes in strings and ALLOW_BYTES
+    to strip b'' prefixes.
+    Useful when the same doctest should run in Python 2 and Python 3.
+
+    An inner class is used to avoid importing "doctest" at the module
+    level.
+    """
+    if hasattr(_get_checker, "LiteralsOutputChecker"):
+        return _get_checker.LiteralsOutputChecker()
+
+    import doctest
+    import re
+
+    class LiteralsOutputChecker(doctest.OutputChecker):
+        """
+        Copied from doctest_nose_plugin.py from the nltk project:
+            https://github.com/nltk/nltk
+
+        Further extended to also support byte literals.
+        """
+
+        _unicode_literal_re = re.compile(r"(\W|^)[uU]([rR]?[\'\"])", re.UNICODE)
+        _bytes_literal_re = re.compile(r"(\W|^)[bB]([rR]?[\'\"])", re.UNICODE)
+
+        def check_output(self, want, got, optionflags):
+            res = doctest.OutputChecker.check_output(self, want, got, optionflags)
+            if res:
+                return True
+
+            allow_unicode = optionflags & _get_allow_unicode_flag()
+            allow_bytes = optionflags & _get_allow_bytes_flag()
+            if not allow_unicode and not allow_bytes:
+                return False
+
+            else:  # pragma: no cover
+
+                def remove_prefixes(regex, txt):
+                    return re.sub(regex, r"\1\2", txt)
+
+                if allow_unicode:
+                    want = remove_prefixes(self._unicode_literal_re, want)
+                    got = remove_prefixes(self._unicode_literal_re, got)
+                if allow_bytes:
+                    want = remove_prefixes(self._bytes_literal_re, want)
+                    got = remove_prefixes(self._bytes_literal_re, got)
+                res = doctest.OutputChecker.check_output(self, want, got, optionflags)
+                return res
+
+    _get_checker.LiteralsOutputChecker = LiteralsOutputChecker
+    return _get_checker.LiteralsOutputChecker()
+
+
+def _get_allow_unicode_flag():
+    """
+    Registers and returns the ALLOW_UNICODE flag.
+    """
+    import doctest
+
+    return doctest.register_optionflag("ALLOW_UNICODE")
+
+
+def _get_allow_bytes_flag():
+    """
+    Registers and returns the ALLOW_BYTES flag.
+    """
+    import doctest
+
+    return doctest.register_optionflag("ALLOW_BYTES")
+
+
+def _get_report_choice(key):
+    """
+    This function returns the actual `doctest` module flag value, we want to do it as late as possible to avoid
+    importing `doctest` and all its dependencies when parsing options, as it adds overhead and breaks tests.
+    """
+    import doctest
+
+    return {
+        DOCTEST_REPORT_CHOICE_UDIFF: doctest.REPORT_UDIFF,
+        DOCTEST_REPORT_CHOICE_CDIFF: doctest.REPORT_CDIFF,
+        DOCTEST_REPORT_CHOICE_NDIFF: doctest.REPORT_NDIFF,
+        DOCTEST_REPORT_CHOICE_ONLY_FIRST_FAILURE: doctest.REPORT_ONLY_FIRST_FAILURE,
+        DOCTEST_REPORT_CHOICE_NONE: 0,
+    }[key]
+
+
+def _fix_spoof_python2(runner, encoding):
+    """
+    Installs a "SpoofOut" into the given DebugRunner so it properly deals with unicode output. This
+    should patch only doctests for text files because they don't have a way to declare their
+    encoding. Doctests in docstrings from Python modules don't have the same problem given that
+    Python already decoded the strings.
+
+    This fixes the problem related in issue #2434.
+    """
+    from _pytest.compat import _PY2
+
+    if not _PY2:
+        return
+
+    from doctest import _SpoofOut
+
+    class UnicodeSpoof(_SpoofOut):
+        def getvalue(self):
+            result = _SpoofOut.getvalue(self)
+            if encoding and isinstance(result, bytes):
+                result = result.decode(encoding)
+            return result
+
+    runner._fakeout = UnicodeSpoof()
+
+
+@pytest.fixture(scope="session")
+def doctest_namespace():
+    """
+    Fixture that returns a :py:class:`dict` that will be injected into the namespace of doctests.
+    """
+    return dict()
diff --git a/contrib/python/pytest/py2/_pytest/fixtures.py b/contrib/python/pytest/py2/_pytest/fixtures.py
new file mode 100644
index 0000000000..280a48608b
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/fixtures.py
@@ -0,0 +1,1356 @@
+# -*- coding: utf-8 -*-
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import functools
+import inspect
+import itertools
+import sys
+import warnings
+from collections import defaultdict
+from collections import deque
+from collections import OrderedDict
+
+import attr
+import py
+import six
+
+import _pytest
+from _pytest import nodes
+from _pytest._code.code import FormattedExcinfo
+from _pytest._code.code import TerminalRepr
+from _pytest.compat import _format_args
+from _pytest.compat import _PytestWrapper
+from _pytest.compat import exc_clear
+from _pytest.compat import FuncargnamesCompatAttr
+from _pytest.compat import get_real_func
+from _pytest.compat import get_real_method
+from _pytest.compat import getfslineno
+from _pytest.compat import getfuncargnames
+from _pytest.compat import getimfunc
+from _pytest.compat import getlocation
+from _pytest.compat import is_generator
+from _pytest.compat import isclass
+from _pytest.compat import NOTSET
+from _pytest.compat import safe_getattr
+from _pytest.deprecated import FIXTURE_FUNCTION_CALL
+from _pytest.deprecated import FIXTURE_NAMED_REQUEST
+from _pytest.outcomes import fail
+from _pytest.outcomes import TEST_OUTCOME
+
+
+@attr.s(frozen=True)
+class PseudoFixtureDef(object):
+    cached_result = attr.ib()
+    scope = attr.ib()
+
+
+def pytest_sessionstart(session):
+    import _pytest.python
+    import _pytest.nodes
+
+    scopename2class.update(
+        {
+            "package": _pytest.python.Package,
+            "class": _pytest.python.Class,
+            "module": _pytest.python.Module,
+            "function": _pytest.nodes.Item,
+            "session": _pytest.main.Session,
+        }
+    )
+    session._fixturemanager = FixtureManager(session)
+
+
+scopename2class = {}
+
+
+scope2props = dict(session=())
+scope2props["package"] = ("fspath",)
+scope2props["module"] = ("fspath", "module")
+scope2props["class"] = scope2props["module"] + ("cls",)
+scope2props["instance"] = scope2props["class"] + ("instance",)
+scope2props["function"] = scope2props["instance"] + ("function", "keywords")
+
+
+def scopeproperty(name=None, doc=None):
+    def decoratescope(func):
+        scopename = name or func.__name__
+
+        def provide(self):
+            if func.__name__ in scope2props[self.scope]:
+                return func(self)
+            raise AttributeError(
+                "%s not available in %s-scoped context" % (scopename, self.scope)
+            )
+
+        return property(provide, None, None, func.__doc__)
+
+    return decoratescope
+
+
+def get_scope_package(node, fixturedef):
+    import pytest
+
+    cls = pytest.Package
+    current = node
+    fixture_package_name = "%s/%s" % (fixturedef.baseid, "__init__.py")
+    while current and (
+        type(current) is not cls or fixture_package_name != current.nodeid
+    ):
+        current = current.parent
+    if current is None:
+        return node.session
+    return current
+
+
+def get_scope_node(node, scope):
+    cls = scopename2class.get(scope)
+    if cls is None:
+        raise ValueError("unknown scope")
+    return node.getparent(cls)
+
+
+def add_funcarg_pseudo_fixture_def(collector, metafunc, fixturemanager):
+    # this function will transform all collected calls to a functions
+    # if they use direct funcargs (i.e. direct parametrization)
+    # because we want later test execution to be able to rely on
+    # an existing FixtureDef structure for all arguments.
+    # XXX we can probably avoid this algorithm  if we modify CallSpec2
+    # to directly care for creating the fixturedefs within its methods.
+    if not metafunc._calls[0].funcargs:
+        return  # this function call does not have direct parametrization
+    # collect funcargs of all callspecs into a list of values
+    arg2params = {}
+    arg2scope = {}
+    for callspec in metafunc._calls:
+        for argname, argvalue in callspec.funcargs.items():
+            assert argname not in callspec.params
+            callspec.params[argname] = argvalue
+            arg2params_list = arg2params.setdefault(argname, [])
+            callspec.indices[argname] = len(arg2params_list)
+            arg2params_list.append(argvalue)
+            if argname not in arg2scope:
+                scopenum = callspec._arg2scopenum.get(argname, scopenum_function)
+                arg2scope[argname] = scopes[scopenum]
+        callspec.funcargs.clear()
+
+    # register artificial FixtureDef's so that later at test execution
+    # time we can rely on a proper FixtureDef to exist for fixture setup.
+    arg2fixturedefs = metafunc._arg2fixturedefs
+    for argname, valuelist in arg2params.items():
+        # if we have a scope that is higher than function we need
+        # to make sure we only ever create an according fixturedef on
+        # a per-scope basis. We thus store and cache the fixturedef on the
+        # node related to the scope.
+        scope = arg2scope[argname]
+        node = None
+        if scope != "function":
+            node = get_scope_node(collector, scope)
+            if node is None:
+                assert scope == "class" and isinstance(collector, _pytest.python.Module)
+                # use module-level collector for class-scope (for now)
+                node = collector
+        if node and argname in node._name2pseudofixturedef:
+            arg2fixturedefs[argname] = [node._name2pseudofixturedef[argname]]
+        else:
+            fixturedef = FixtureDef(
+                fixturemanager,
+                "",
+                argname,
+                get_direct_param_fixture_func,
+                arg2scope[argname],
+                valuelist,
+                False,
+                False,
+            )
+            arg2fixturedefs[argname] = [fixturedef]
+            if node is not None:
+                node._name2pseudofixturedef[argname] = fixturedef
+
+
+def getfixturemarker(obj):
+    """ return fixturemarker or None if it doesn't exist or raised
+    exceptions."""
+    try:
+        return getattr(obj, "_pytestfixturefunction", None)
+    except TEST_OUTCOME:
+        # some objects raise errors like request (from flask import request)
+        # we don't expect them to be fixture functions
+        return None
+
+
+def get_parametrized_fixture_keys(item, scopenum):
+    """ return list of keys for all parametrized arguments which match
+    the specified scope. """
+    assert scopenum < scopenum_function  # function
+    try:
+        cs = item.callspec
+    except AttributeError:
+        pass
+    else:
+        # cs.indices.items() is random order of argnames.  Need to
+        # sort this so that different calls to
+        # get_parametrized_fixture_keys will be deterministic.
+        for argname, param_index in sorted(cs.indices.items()):
+            if cs._arg2scopenum[argname] != scopenum:
+                continue
+            if scopenum == 0:  # session
+                key = (argname, param_index)
+            elif scopenum == 1:  # package
+                key = (argname, param_index, item.fspath.dirpath())
+            elif scopenum == 2:  # module
+                key = (argname, param_index, item.fspath)
+            elif scopenum == 3:  # class
+                key = (argname, param_index, item.fspath, item.cls)
+            yield key
+
+
+# algorithm for sorting on a per-parametrized resource setup basis
+# it is called for scopenum==0 (session) first and performs sorting
+# down to the lower scopes such as to minimize number of "high scope"
+# setups and teardowns
+
+
+def reorder_items(items):
+    argkeys_cache = {}
+    items_by_argkey = {}
+    for scopenum in range(0, scopenum_function):
+        argkeys_cache[scopenum] = d = {}
+        items_by_argkey[scopenum] = item_d = defaultdict(deque)
+        for item in items:
+            keys = OrderedDict.fromkeys(get_parametrized_fixture_keys(item, scopenum))
+            if keys:
+                d[item] = keys
+                for key in keys:
+                    item_d[key].append(item)
+    items = OrderedDict.fromkeys(items)
+    return list(reorder_items_atscope(items, argkeys_cache, items_by_argkey, 0))
+
+
+def fix_cache_order(item, argkeys_cache, items_by_argkey):
+    for scopenum in range(0, scopenum_function):
+        for key in argkeys_cache[scopenum].get(item, []):
+            items_by_argkey[scopenum][key].appendleft(item)
+
+
+def reorder_items_atscope(items, argkeys_cache, items_by_argkey, scopenum):
+    if scopenum >= scopenum_function or len(items) < 3:
+        return items
+    ignore = set()
+    items_deque = deque(items)
+    items_done = OrderedDict()
+    scoped_items_by_argkey = items_by_argkey[scopenum]
+    scoped_argkeys_cache = argkeys_cache[scopenum]
+    while items_deque:
+        no_argkey_group = OrderedDict()
+        slicing_argkey = None
+        while items_deque:
+            item = items_deque.popleft()
+            if item in items_done or item in no_argkey_group:
+                continue
+            argkeys = OrderedDict.fromkeys(
+                k for k in scoped_argkeys_cache.get(item, []) if k not in ignore
+            )
+            if not argkeys:
+                no_argkey_group[item] = None
+            else:
+                slicing_argkey, _ = argkeys.popitem()
+                # we don't have to remove relevant items from later in the deque because they'll just be ignored
+                matching_items = [
+                    i for i in scoped_items_by_argkey[slicing_argkey] if i in items
+                ]
+                for i in reversed(matching_items):
+                    fix_cache_order(i, argkeys_cache, items_by_argkey)
+                    items_deque.appendleft(i)
+                break
+        if no_argkey_group:
+            no_argkey_group = reorder_items_atscope(
+                no_argkey_group, argkeys_cache, items_by_argkey, scopenum + 1
+            )
+            for item in no_argkey_group:
+                items_done[item] = None
+        ignore.add(slicing_argkey)
+    return items_done
+
+
+def fillfixtures(function):
+    """ fill missing funcargs for a test function. """
+    try:
+        request = function._request
+    except AttributeError:
+        # XXX this special code path is only expected to execute
+        # with the oejskit plugin.  It uses classes with funcargs
+        # and we thus have to work a bit to allow this.
+        fm = function.session._fixturemanager
+        fi = fm.getfixtureinfo(function.parent, function.obj, None)
+        function._fixtureinfo = fi
+        request = function._request = FixtureRequest(function)
+        request._fillfixtures()
+        # prune out funcargs for jstests
+        newfuncargs = {}
+        for name in fi.argnames:
+            newfuncargs[name] = function.funcargs[name]
+        function.funcargs = newfuncargs
+    else:
+        request._fillfixtures()
+
+
+def get_direct_param_fixture_func(request):
+    return request.param
+
+
+@attr.s(slots=True)
+class FuncFixtureInfo(object):
+    # original function argument names
+    argnames = attr.ib(type=tuple)
+    # argnames that function immediately requires. These include argnames +
+    # fixture names specified via usefixtures and via autouse=True in fixture
+    # definitions.
+    initialnames = attr.ib(type=tuple)
+    names_closure = attr.ib()  # List[str]
+    name2fixturedefs = attr.ib()  # List[str, List[FixtureDef]]
+
+    def prune_dependency_tree(self):
+        """Recompute names_closure from initialnames and name2fixturedefs
+
+        Can only reduce names_closure, which means that the new closure will
+        always be a subset of the old one. The order is preserved.
+
+        This method is needed because direct parametrization may shadow some
+        of the fixtures that were included in the originally built dependency
+        tree. In this way the dependency tree can get pruned, and the closure
+        of argnames may get reduced.
+        """
+        closure = set()
+        working_set = set(self.initialnames)
+        while working_set:
+            argname = working_set.pop()
+            # argname may be smth not included in the original names_closure,
+            # in which case we ignore it. This currently happens with pseudo
+            # FixtureDefs which wrap 'get_direct_param_fixture_func(request)'.
+            # So they introduce the new dependency 'request' which might have
+            # been missing in the original tree (closure).
+            if argname not in closure and argname in self.names_closure:
+                closure.add(argname)
+                if argname in self.name2fixturedefs:
+                    working_set.update(self.name2fixturedefs[argname][-1].argnames)
+
+        self.names_closure[:] = sorted(closure, key=self.names_closure.index)
+
+
+class FixtureRequest(FuncargnamesCompatAttr):
+    """ A request for a fixture from a test or fixture function.
+
+    A request object gives access to the requesting test context
+    and has an optional ``param`` attribute in case
+    the fixture is parametrized indirectly.
+    """
+
+    def __init__(self, pyfuncitem):
+        self._pyfuncitem = pyfuncitem
+        #: fixture for which this request is being performed
+        self.fixturename = None
+        #: Scope string, one of "function", "class", "module", "session"
+        self.scope = "function"
+        self._fixture_defs = {}  # argname -> FixtureDef
+        fixtureinfo = pyfuncitem._fixtureinfo
+        self._arg2fixturedefs = fixtureinfo.name2fixturedefs.copy()
+        self._arg2index = {}
+        self._fixturemanager = pyfuncitem.session._fixturemanager
+
+    @property
+    def fixturenames(self):
+        """names of all active fixtures in this request"""
+        result = list(self._pyfuncitem._fixtureinfo.names_closure)
+        result.extend(set(self._fixture_defs).difference(result))
+        return result
+
+    @property
+    def node(self):
+        """ underlying collection node (depends on current request scope)"""
+        return self._getscopeitem(self.scope)
+
+    def _getnextfixturedef(self, argname):
+        fixturedefs = self._arg2fixturedefs.get(argname, None)
+        if fixturedefs is None:
+            # we arrive here because of a dynamic call to
+            # getfixturevalue(argname) usage which was naturally
+            # not known at parsing/collection time
+            parentid = self._pyfuncitem.parent.nodeid
+            fixturedefs = self._fixturemanager.getfixturedefs(argname, parentid)
+            self._arg2fixturedefs[argname] = fixturedefs
+        # fixturedefs list is immutable so we maintain a decreasing index
+        index = self._arg2index.get(argname, 0) - 1
+        if fixturedefs is None or (-index > len(fixturedefs)):
+            raise FixtureLookupError(argname, self)
+        self._arg2index[argname] = index
+        return fixturedefs[index]
+
+    @property
+    def config(self):
+        """ the pytest config object associated with this request. """
+        return self._pyfuncitem.config
+
+    @scopeproperty()
+    def function(self):
+        """ test function object if the request has a per-function scope. """
+        return self._pyfuncitem.obj
+
+    @scopeproperty("class")
+    def cls(self):
+        """ class (can be None) where the test function was collected. """
+        clscol = self._pyfuncitem.getparent(_pytest.python.Class)
+        if clscol:
+            return clscol.obj
+
+    @property
+    def instance(self):
+        """ instance (can be None) on which test function was collected. """
+        # unittest support hack, see _pytest.unittest.TestCaseFunction
+        try:
+            return self._pyfuncitem._testcase
+        except AttributeError:
+            function = getattr(self, "function", None)
+            return getattr(function, "__self__", None)
+
+    @scopeproperty()
+    def module(self):
+        """ python module object where the test function was collected. """
+        return self._pyfuncitem.getparent(_pytest.python.Module).obj
+
+    @scopeproperty()
+    def fspath(self):
+        """ the file system path of the test module which collected this test. """
+        return self._pyfuncitem.fspath
+
+    @property
+    def keywords(self):
+        """ keywords/markers dictionary for the underlying node. """
+        return self.node.keywords
+
+    @property
+    def session(self):
+        """ pytest session object. """
+        return self._pyfuncitem.session
+
+    def addfinalizer(self, finalizer):
+        """ add finalizer/teardown function to be called after the
+        last test within the requesting test context finished
+        execution. """
+        # XXX usually this method is shadowed by fixturedef specific ones
+        self._addfinalizer(finalizer, scope=self.scope)
+
+    def _addfinalizer(self, finalizer, scope):
+        colitem = self._getscopeitem(scope)
+        self._pyfuncitem.session._setupstate.addfinalizer(
+            finalizer=finalizer, colitem=colitem
+        )
+
+    def applymarker(self, marker):
+        """ Apply a marker to a single test function invocation.
+        This method is useful if you don't want to have a keyword/marker
+        on all function invocations.
+
+        :arg marker: a :py:class:`_pytest.mark.MarkDecorator` object
+            created by a call to ``pytest.mark.NAME(...)``.
+        """
+        self.node.add_marker(marker)
+
+    def raiseerror(self, msg):
+        """ raise a FixtureLookupError with the given message. """
+        raise self._fixturemanager.FixtureLookupError(None, self, msg)
+
+    def _fillfixtures(self):
+        item = self._pyfuncitem
+        fixturenames = getattr(item, "fixturenames", self.fixturenames)
+        for argname in fixturenames:
+            if argname not in item.funcargs:
+                item.funcargs[argname] = self.getfixturevalue(argname)
+
+    def getfixturevalue(self, argname):
+        """ Dynamically run a named fixture function.
+
+        Declaring fixtures via function argument is recommended where possible.
+        But if you can only decide whether to use another fixture at test
+        setup time, you may use this function to retrieve it inside a fixture
+        or test function body.
+        """
+        return self._get_active_fixturedef(argname).cached_result[0]
+
+    def getfuncargvalue(self, argname):
+        """ Deprecated, use getfixturevalue. """
+        from _pytest import deprecated
+
+        warnings.warn(deprecated.GETFUNCARGVALUE, stacklevel=2)
+        return self.getfixturevalue(argname)
+
+    def _get_active_fixturedef(self, argname):
+        try:
+            return self._fixture_defs[argname]
+        except KeyError:
+            try:
+                fixturedef = self._getnextfixturedef(argname)
+            except FixtureLookupError:
+                if argname == "request":
+                    cached_result = (self, [0], None)
+                    scope = "function"
+                    return PseudoFixtureDef(cached_result, scope)
+                raise
+        # remove indent to prevent the python3 exception
+        # from leaking into the call
+        self._compute_fixture_value(fixturedef)
+        self._fixture_defs[argname] = fixturedef
+        return fixturedef
+
+    def _get_fixturestack(self):
+        current = self
+        values = []
+        while 1:
+            fixturedef = getattr(current, "_fixturedef", None)
+            if fixturedef is None:
+                values.reverse()
+                return values
+            values.append(fixturedef)
+            current = current._parent_request
+
+    def _compute_fixture_value(self, fixturedef):
+        """
+        Creates a SubRequest based on "self" and calls the execute method of the given fixturedef object. This will
+        force the FixtureDef object to throw away any previous results and compute a new fixture value, which
+        will be stored into the FixtureDef object itself.
+
+        :param FixtureDef fixturedef:
+        """
+        # prepare a subrequest object before calling fixture function
+        # (latter managed by fixturedef)
+        argname = fixturedef.argname
+        funcitem = self._pyfuncitem
+        scope = fixturedef.scope
+        try:
+            param = funcitem.callspec.getparam(argname)
+        except (AttributeError, ValueError):
+            param = NOTSET
+            param_index = 0
+            has_params = fixturedef.params is not None
+            fixtures_not_supported = getattr(funcitem, "nofuncargs", False)
+            if has_params and fixtures_not_supported:
+                msg = (
+                    "{name} does not support fixtures, maybe unittest.TestCase subclass?\n"
+                    "Node id: {nodeid}\n"
+                    "Function type: {typename}"
+                ).format(
+                    name=funcitem.name,
+                    nodeid=funcitem.nodeid,
+                    typename=type(funcitem).__name__,
+                )
+                fail(msg, pytrace=False)
+            if has_params:
+                frame = inspect.stack()[3]
+                frameinfo = inspect.getframeinfo(frame[0])
+                source_path = frameinfo.filename
+                source_lineno = frameinfo.lineno
+                source_path = py.path.local(source_path)
+                if source_path.relto(funcitem.config.rootdir):
+                    source_path = source_path.relto(funcitem.config.rootdir)
+                msg = (
+                    "The requested fixture has no parameter defined for test:\n"
+                    "    {}\n\n"
+                    "Requested fixture '{}' defined in:\n{}"
+                    "\n\nRequested here:\n{}:{}".format(
+                        funcitem.nodeid,
+                        fixturedef.argname,
+                        getlocation(fixturedef.func, funcitem.config.rootdir),
+                        source_path,
+                        source_lineno,
+                    )
+                )
+                fail(msg, pytrace=False)
+        else:
+            param_index = funcitem.callspec.indices[argname]
+            # if a parametrize invocation set a scope it will override
+            # the static scope defined with the fixture function
+            paramscopenum = funcitem.callspec._arg2scopenum.get(argname)
+            if paramscopenum is not None:
+                scope = scopes[paramscopenum]
+
+        subrequest = SubRequest(self, scope, param, param_index, fixturedef)
+
+        # check if a higher-level scoped fixture accesses a lower level one
+        subrequest._check_scope(argname, self.scope, scope)
+
+        # clear sys.exc_info before invoking the fixture (python bug?)
+        # if it's not explicitly cleared it will leak into the call
+        exc_clear()
+        try:
+            # call the fixture function
+            fixturedef.execute(request=subrequest)
+        finally:
+            self._schedule_finalizers(fixturedef, subrequest)
+
+    def _schedule_finalizers(self, fixturedef, subrequest):
+        # if fixture function failed it might have registered finalizers
+        self.session._setupstate.addfinalizer(
+            functools.partial(fixturedef.finish, request=subrequest), subrequest.node
+        )
+
+    def _check_scope(self, argname, invoking_scope, requested_scope):
+        if argname == "request":
+            return
+        if scopemismatch(invoking_scope, requested_scope):
+            # try to report something helpful
+            lines = self._factorytraceback()
+            fail(
+                "ScopeMismatch: You tried to access the %r scoped "
+                "fixture %r with a %r scoped request object, "
+                "involved factories\n%s"
+                % ((requested_scope, argname, invoking_scope, "\n".join(lines))),
+                pytrace=False,
+            )
+
+    def _factorytraceback(self):
+        lines = []
+        for fixturedef in self._get_fixturestack():
+            factory = fixturedef.func
+            fs, lineno = getfslineno(factory)
+            p = self._pyfuncitem.session.fspath.bestrelpath(fs)
+            args = _format_args(factory)
+            lines.append("%s:%d:  def %s%s" % (p, lineno + 1, factory.__name__, args))
+        return lines
+
+    def _getscopeitem(self, scope):
+        if scope == "function":
+            # this might also be a non-function Item despite its attribute name
+            return self._pyfuncitem
+        if scope == "package":
+            node = get_scope_package(self._pyfuncitem, self._fixturedef)
+        else:
+            node = get_scope_node(self._pyfuncitem, scope)
+        if node is None and scope == "class":
+            # fallback to function item itself
+            node = self._pyfuncitem
+        assert node, 'Could not obtain a node for scope "{}" for function {!r}'.format(
+            scope, self._pyfuncitem
+        )
+        return node
+
+    def __repr__(self):
+        return "<FixtureRequest for %r>" % (self.node)
+
+
+class SubRequest(FixtureRequest):
+    """ a sub request for handling getting a fixture from a
+    test function/fixture. """
+
+    def __init__(self, request, scope, param, param_index, fixturedef):
+        self._parent_request = request
+        self.fixturename = fixturedef.argname
+        if param is not NOTSET:
+            self.param = param
+        self.param_index = param_index
+        self.scope = scope
+        self._fixturedef = fixturedef
+        self._pyfuncitem = request._pyfuncitem
+        self._fixture_defs = request._fixture_defs
+        self._arg2fixturedefs = request._arg2fixturedefs
+        self._arg2index = request._arg2index
+        self._fixturemanager = request._fixturemanager
+
+    def __repr__(self):
+        return "<SubRequest %r for %r>" % (self.fixturename, self._pyfuncitem)
+
+    def addfinalizer(self, finalizer):
+        self._fixturedef.addfinalizer(finalizer)
+
+    def _schedule_finalizers(self, fixturedef, subrequest):
+        # if the executing fixturedef was not explicitly requested in the argument list (via
+        # getfixturevalue inside the fixture call) then ensure this fixture def will be finished
+        # first
+        if fixturedef.argname not in self.funcargnames:
+            fixturedef.addfinalizer(
+                functools.partial(self._fixturedef.finish, request=self)
+            )
+        super(SubRequest, self)._schedule_finalizers(fixturedef, subrequest)
+
+
+scopes = "session package module class function".split()
+scopenum_function = scopes.index("function")
+
+
+def scopemismatch(currentscope, newscope):
+    return scopes.index(newscope) > scopes.index(currentscope)
+
+
+def scope2index(scope, descr, where=None):
+    """Look up the index of ``scope`` and raise a descriptive value error
+    if not defined.
+    """
+    try:
+        return scopes.index(scope)
+    except ValueError:
+        fail(
+            "{} {}got an unexpected scope value '{}'".format(
+                descr, "from {} ".format(where) if where else "", scope
+            ),
+            pytrace=False,
+        )
+
+
+class FixtureLookupError(LookupError):
+    """ could not return a requested Fixture (missing or invalid). """
+
+    def __init__(self, argname, request, msg=None):
+        self.argname = argname
+        self.request = request
+        self.fixturestack = request._get_fixturestack()
+        self.msg = msg
+
+    def formatrepr(self):
+        tblines = []
+        addline = tblines.append
+        stack = [self.request._pyfuncitem.obj]
+        stack.extend(map(lambda x: x.func, self.fixturestack))
+        msg = self.msg
+        if msg is not None:
+            # the last fixture raise an error, let's present
+            # it at the requesting side
+            stack = stack[:-1]
+        for function in stack:
+            fspath, lineno = getfslineno(function)
+            try:
+                lines, _ = inspect.getsourcelines(get_real_func(function))
+            except (IOError, IndexError, TypeError):
+                error_msg = "file %s, line %s: source code not available"
+                addline(error_msg % (fspath, lineno + 1))
+            else:
+                addline("file %s, line %s" % (fspath, lineno + 1))
+                for i, line in enumerate(lines):
+                    line = line.rstrip()
+                    addline("  " + line)
+                    if line.lstrip().startswith("def"):
+                        break
+
+        if msg is None:
+            fm = self.request._fixturemanager
+            available = set()
+            parentid = self.request._pyfuncitem.parent.nodeid
+            for name, fixturedefs in fm._arg2fixturedefs.items():
+                faclist = list(fm._matchfactories(fixturedefs, parentid))
+                if faclist:
+                    available.add(name)
+            if self.argname in available:
+                msg = " recursive dependency involving fixture '{}' detected".format(
+                    self.argname
+                )
+            else:
+                msg = "fixture '{}' not found".format(self.argname)
+            msg += "\n available fixtures: {}".format(", ".join(sorted(available)))
+            msg += "\n use 'pytest --fixtures [testpath]' for help on them."
+
+        return FixtureLookupErrorRepr(fspath, lineno, tblines, msg, self.argname)
+
+
+class FixtureLookupErrorRepr(TerminalRepr):
+    def __init__(self, filename, firstlineno, tblines, errorstring, argname):
+        self.tblines = tblines
+        self.errorstring = errorstring
+        self.filename = filename
+        self.firstlineno = firstlineno
+        self.argname = argname
+
+    def toterminal(self, tw):
+        # tw.line("FixtureLookupError: %s" %(self.argname), red=True)
+        for tbline in self.tblines:
+            tw.line(tbline.rstrip())
+        lines = self.errorstring.split("\n")
+        if lines:
+            tw.line(
+                "{}       {}".format(FormattedExcinfo.fail_marker, lines[0].strip()),
+                red=True,
+            )
+            for line in lines[1:]:
+                tw.line(
+                    "{}       {}".format(FormattedExcinfo.flow_marker, line.strip()),
+                    red=True,
+                )
+        tw.line()
+        tw.line("%s:%d" % (self.filename, self.firstlineno + 1))
+
+
+def fail_fixturefunc(fixturefunc, msg):
+    fs, lineno = getfslineno(fixturefunc)
+    location = "%s:%s" % (fs, lineno + 1)
+    source = _pytest._code.Source(fixturefunc)
+    fail(msg + ":\n\n" + str(source.indent()) + "\n" + location, pytrace=False)
+
+
+def call_fixture_func(fixturefunc, request, kwargs):
+    yieldctx = is_generator(fixturefunc)
+    if yieldctx:
+        it = fixturefunc(**kwargs)
+        res = next(it)
+        finalizer = functools.partial(_teardown_yield_fixture, fixturefunc, it)
+        request.addfinalizer(finalizer)
+    else:
+        res = fixturefunc(**kwargs)
+    return res
+
+
+def _teardown_yield_fixture(fixturefunc, it):
+    """Executes the teardown of a fixture function by advancing the iterator after the
+    yield and ensure the iteration ends (if not it means there is more than one yield in the function)"""
+    try:
+        next(it)
+    except StopIteration:
+        pass
+    else:
+        fail_fixturefunc(
+            fixturefunc, "yield_fixture function has more than one 'yield'"
+        )
+
+
+class FixtureDef(object):
+    """ A container for a factory definition. """
+
+    def __init__(
+        self,
+        fixturemanager,
+        baseid,
+        argname,
+        func,
+        scope,
+        params,
+        unittest=False,
+        ids=None,
+    ):
+        self._fixturemanager = fixturemanager
+        self.baseid = baseid or ""
+        self.has_location = baseid is not None
+        self.func = func
+        self.argname = argname
+        self.scope = scope
+        self.scopenum = scope2index(
+            scope or "function",
+            descr="Fixture '{}'".format(func.__name__),
+            where=baseid,
+        )
+        self.params = params
+        self.argnames = getfuncargnames(func, is_method=unittest)
+        self.unittest = unittest
+        self.ids = ids
+        self._finalizers = []
+
+    def addfinalizer(self, finalizer):
+        self._finalizers.append(finalizer)
+
+    def finish(self, request):
+        exceptions = []
+        try:
+            while self._finalizers:
+                try:
+                    func = self._finalizers.pop()
+                    func()
+                except:  # noqa
+                    exceptions.append(sys.exc_info())
+            if exceptions:
+                e = exceptions[0]
+                # Ensure to not keep frame references through traceback.
+                del exceptions
+                six.reraise(*e)
+        finally:
+            hook = self._fixturemanager.session.gethookproxy(request.node.fspath)
+            hook.pytest_fixture_post_finalizer(fixturedef=self, request=request)
+            # even if finalization fails, we invalidate
+            # the cached fixture value and remove
+            # all finalizers because they may be bound methods which will
+            # keep instances alive
+            if hasattr(self, "cached_result"):
+                del self.cached_result
+            self._finalizers = []
+
+    def execute(self, request):
+        # get required arguments and register our own finish()
+        # with their finalization
+        for argname in self.argnames:
+            fixturedef = request._get_active_fixturedef(argname)
+            if argname != "request":
+                fixturedef.addfinalizer(functools.partial(self.finish, request=request))
+
+        my_cache_key = request.param_index
+        cached_result = getattr(self, "cached_result", None)
+        if cached_result is not None:
+            result, cache_key, err = cached_result
+            if my_cache_key == cache_key:
+                if err is not None:
+                    six.reraise(*err)
+                else:
+                    return result
+            # we have a previous but differently parametrized fixture instance
+            # so we need to tear it down before creating a new one
+            self.finish(request)
+            assert not hasattr(self, "cached_result")
+
+        hook = self._fixturemanager.session.gethookproxy(request.node.fspath)
+        return hook.pytest_fixture_setup(fixturedef=self, request=request)
+
+    def __repr__(self):
+        return "<FixtureDef argname=%r scope=%r baseid=%r>" % (
+            self.argname,
+            self.scope,
+            self.baseid,
+        )
+
+
+def resolve_fixture_function(fixturedef, request):
+    """Gets the actual callable that can be called to obtain the fixture value, dealing with unittest-specific
+    instances and bound methods.
+    """
+    fixturefunc = fixturedef.func
+    if fixturedef.unittest:
+        if request.instance is not None:
+            # bind the unbound method to the TestCase instance
+            fixturefunc = fixturedef.func.__get__(request.instance)
+    else:
+        # the fixture function needs to be bound to the actual
+        # request.instance so that code working with "fixturedef" behaves
+        # as expected.
+        if request.instance is not None:
+            fixturefunc = getimfunc(fixturedef.func)
+            if fixturefunc != fixturedef.func:
+                fixturefunc = fixturefunc.__get__(request.instance)
+    return fixturefunc
+
+
+def pytest_fixture_setup(fixturedef, request):
+    """ Execution of fixture setup. """
+    kwargs = {}
+    for argname in fixturedef.argnames:
+        fixdef = request._get_active_fixturedef(argname)
+        result, arg_cache_key, exc = fixdef.cached_result
+        request._check_scope(argname, request.scope, fixdef.scope)
+        kwargs[argname] = result
+
+    fixturefunc = resolve_fixture_function(fixturedef, request)
+    my_cache_key = request.param_index
+    try:
+        result = call_fixture_func(fixturefunc, request, kwargs)
+    except TEST_OUTCOME:
+        fixturedef.cached_result = (None, my_cache_key, sys.exc_info())
+        raise
+    fixturedef.cached_result = (result, my_cache_key, None)
+    return result
+
+
+def _ensure_immutable_ids(ids):
+    if ids is None:
+        return
+    if callable(ids):
+        return ids
+    return tuple(ids)
+
+
+def wrap_function_to_error_out_if_called_directly(function, fixture_marker):
+    """Wrap the given fixture function so we can raise an error about it being called directly,
+    instead of used as an argument in a test function.
+    """
+    message = FIXTURE_FUNCTION_CALL.format(
+        name=fixture_marker.name or function.__name__
+    )
+
+    @six.wraps(function)
+    def result(*args, **kwargs):
+        fail(message, pytrace=False)
+
+    # keep reference to the original function in our own custom attribute so we don't unwrap
+    # further than this point and lose useful wrappings like @mock.patch (#3774)
+    result.__pytest_wrapped__ = _PytestWrapper(function)
+
+    return result
+
+
+@attr.s(frozen=True)
+class FixtureFunctionMarker(object):
+    scope = attr.ib()
+    params = attr.ib(converter=attr.converters.optional(tuple))
+    autouse = attr.ib(default=False)
+    ids = attr.ib(default=None, converter=_ensure_immutable_ids)
+    name = attr.ib(default=None)
+
+    def __call__(self, function):
+        if isclass(function):
+            raise ValueError("class fixtures not supported (maybe in the future)")
+
+        if getattr(function, "_pytestfixturefunction", False):
+            raise ValueError(
+                "fixture is being applied more than once to the same function"
+            )
+
+        function = wrap_function_to_error_out_if_called_directly(function, self)
+
+        name = self.name or function.__name__
+        if name == "request":
+            warnings.warn(FIXTURE_NAMED_REQUEST)
+        function._pytestfixturefunction = self
+        return function
+
+
+def fixture(scope="function", params=None, autouse=False, ids=None, name=None):
+    """Decorator to mark a fixture factory function.
+
+    This decorator can be used, with or without parameters, to define a
+    fixture function.
+
+    The name of the fixture function can later be referenced to cause its
+    invocation ahead of running tests: test
+    modules or classes can use the ``pytest.mark.usefixtures(fixturename)``
+    marker.
+
+    Test functions can directly use fixture names as input
+    arguments in which case the fixture instance returned from the fixture
+    function will be injected.
+
+    Fixtures can provide their values to test functions using ``return`` or ``yield``
+    statements. When using ``yield`` the code block after the ``yield`` statement is executed
+    as teardown code regardless of the test outcome, and must yield exactly once.
+
+    :arg scope: the scope for which this fixture is shared, one of
+                ``"function"`` (default), ``"class"``, ``"module"``,
+                ``"package"`` or ``"session"``.
+
+                ``"package"`` is considered **experimental** at this time.
+
+    :arg params: an optional list of parameters which will cause multiple
+                invocations of the fixture function and all of the tests
+                using it.
+                The current parameter is available in ``request.param``.
+
+    :arg autouse: if True, the fixture func is activated for all tests that
+                can see it.  If False (the default) then an explicit
+                reference is needed to activate the fixture.
+
+    :arg ids: list of string ids each corresponding to the params
+                so that they are part of the test id. If no ids are provided
+                they will be generated automatically from the params.
+
+    :arg name: the name of the fixture. This defaults to the name of the
+                decorated function. If a fixture is used in the same module in
+                which it is defined, the function name of the fixture will be
+                shadowed by the function arg that requests the fixture; one way
+                to resolve this is to name the decorated function
+                ``fixture_<fixturename>`` and then use
+                ``@pytest.fixture(name='<fixturename>')``.
+    """
+    if callable(scope) and params is None and autouse is False:
+        # direct decoration
+        return FixtureFunctionMarker("function", params, autouse, name=name)(scope)
+    if params is not None and not isinstance(params, (list, tuple)):
+        params = list(params)
+    return FixtureFunctionMarker(scope, params, autouse, ids=ids, name=name)
+
+
+def yield_fixture(scope="function", params=None, autouse=False, ids=None, name=None):
+    """ (return a) decorator to mark a yield-fixture factory function.
+
+    .. deprecated:: 3.0
+        Use :py:func:`pytest.fixture` directly instead.
+    """
+    return fixture(scope=scope, params=params, autouse=autouse, ids=ids, name=name)
+
+
+defaultfuncargprefixmarker = fixture()
+
+
+@fixture(scope="session")
+def pytestconfig(request):
+    """Session-scoped fixture that returns the :class:`_pytest.config.Config` object.
+
+    Example::
+
+        def test_foo(pytestconfig):
+            if pytestconfig.getoption("verbose") > 0:
+                ...
+
+    """
+    return request.config
+
+
+def pytest_addoption(parser):
+    parser.addini(
+        "usefixtures",
+        type="args",
+        default=[],
+        help="list of default fixtures to be used with this project",
+    )
+
+
+class FixtureManager(object):
+    """
+    pytest fixtures definitions and information is stored and managed
+    from this class.
+
+    During collection fm.parsefactories() is called multiple times to parse
+    fixture function definitions into FixtureDef objects and internal
+    data structures.
+
+    During collection of test functions, metafunc-mechanics instantiate
+    a FuncFixtureInfo object which is cached per node/func-name.
+    This FuncFixtureInfo object is later retrieved by Function nodes
+    which themselves offer a fixturenames attribute.
+
+    The FuncFixtureInfo object holds information about fixtures and FixtureDefs
+    relevant for a particular function.  An initial list of fixtures is
+    assembled like this:
+
+    - ini-defined usefixtures
+    - autouse-marked fixtures along the collection chain up from the function
+    - usefixtures markers at module/class/function level
+    - test function funcargs
+
+    Subsequently the funcfixtureinfo.fixturenames attribute is computed
+    as the closure of the fixtures needed to setup the initial fixtures,
+    i. e. fixtures needed by fixture functions themselves are appended
+    to the fixturenames list.
+
+    Upon the test-setup phases all fixturenames are instantiated, retrieved
+    by a lookup of their FuncFixtureInfo.
+    """
+
+    FixtureLookupError = FixtureLookupError
+    FixtureLookupErrorRepr = FixtureLookupErrorRepr
+
+    def __init__(self, session):
+        self.session = session
+        self.config = session.config
+        self._arg2fixturedefs = {}
+        self._holderobjseen = set()
+        self._arg2finish = {}
+        self._nodeid_and_autousenames = [("", self.config.getini("usefixtures"))]
+        session.config.pluginmanager.register(self, "funcmanage")
+
+    def _get_direct_parametrize_args(self, node):
+        """This function returns all the direct parametrization
+        arguments of a node, so we don't mistake them for fixtures
+
+        Check https://github.com/pytest-dev/pytest/issues/5036
+
+        This things are done later as well when dealing with parametrization
+        so this could be improved
+        """
+        from _pytest.mark import ParameterSet
+
+        parametrize_argnames = []
+        for marker in node.iter_markers(name="parametrize"):
+            if not marker.kwargs.get("indirect", False):
+                p_argnames, _ = ParameterSet._parse_parametrize_args(
+                    *marker.args, **marker.kwargs
+                )
+                parametrize_argnames.extend(p_argnames)
+
+        return parametrize_argnames
+
+    def getfixtureinfo(self, node, func, cls, funcargs=True):
+        if funcargs and not getattr(node, "nofuncargs", False):
+            argnames = getfuncargnames(func, cls=cls)
+        else:
+            argnames = ()
+
+        usefixtures = itertools.chain.from_iterable(
+            mark.args for mark in node.iter_markers(name="usefixtures")
+        )
+        initialnames = tuple(usefixtures) + argnames
+        fm = node.session._fixturemanager
+        initialnames, names_closure, arg2fixturedefs = fm.getfixtureclosure(
+            initialnames, node, ignore_args=self._get_direct_parametrize_args(node)
+        )
+        return FuncFixtureInfo(argnames, initialnames, names_closure, arg2fixturedefs)
+
+    def pytest_plugin_registered(self, plugin):
+        nodeid = None
+        try:
+            p = py.path.local(plugin.__file__).realpath()
+        except AttributeError:
+            pass
+        else:
+            # construct the base nodeid which is later used to check
+            # what fixtures are visible for particular tests (as denoted
+            # by their test id)
+            if p.basename.startswith("conftest.py"):
+                nodeid = p.dirpath().relto(self.config.rootdir)
+                if p.sep != nodes.SEP:
+                    nodeid = nodeid.replace(p.sep, nodes.SEP)
+
+        self.parsefactories(plugin, nodeid)
+
+    def _getautousenames(self, nodeid):
+        """ return a tuple of fixture names to be used. """
+        autousenames = []
+        for baseid, basenames in self._nodeid_and_autousenames:
+            if nodeid.startswith(baseid):
+                if baseid:
+                    i = len(baseid)
+                    nextchar = nodeid[i : i + 1]
+                    if nextchar and nextchar not in ":/":
+                        continue
+                autousenames.extend(basenames)
+        return autousenames
+
+    def getfixtureclosure(self, fixturenames, parentnode, ignore_args=()):
+        # collect the closure of all fixtures , starting with the given
+        # fixturenames as the initial set.  As we have to visit all
+        # factory definitions anyway, we also return an arg2fixturedefs
+        # mapping so that the caller can reuse it and does not have
+        # to re-discover fixturedefs again for each fixturename
+        # (discovering matching fixtures for a given name/node is expensive)
+
+        parentid = parentnode.nodeid
+        fixturenames_closure = self._getautousenames(parentid)
+
+        def merge(otherlist):
+            for arg in otherlist:
+                if arg not in fixturenames_closure:
+                    fixturenames_closure.append(arg)
+
+        merge(fixturenames)
+
+        # at this point, fixturenames_closure contains what we call "initialnames",
+        # which is a set of fixturenames the function immediately requests. We
+        # need to return it as well, so save this.
+        initialnames = tuple(fixturenames_closure)
+
+        arg2fixturedefs = {}
+        lastlen = -1
+        while lastlen != len(fixturenames_closure):
+            lastlen = len(fixturenames_closure)
+            for argname in fixturenames_closure:
+                if argname in ignore_args:
+                    continue
+                if argname in arg2fixturedefs:
+                    continue
+                fixturedefs = self.getfixturedefs(argname, parentid)
+                if fixturedefs:
+                    arg2fixturedefs[argname] = fixturedefs
+                    merge(fixturedefs[-1].argnames)
+
+        def sort_by_scope(arg_name):
+            try:
+                fixturedefs = arg2fixturedefs[arg_name]
+            except KeyError:
+                return scopes.index("function")
+            else:
+                return fixturedefs[-1].scopenum
+
+        fixturenames_closure.sort(key=sort_by_scope)
+        return initialnames, fixturenames_closure, arg2fixturedefs
+
+    def pytest_generate_tests(self, metafunc):
+        for argname in metafunc.fixturenames:
+            faclist = metafunc._arg2fixturedefs.get(argname)
+            if faclist:
+                fixturedef = faclist[-1]
+                if fixturedef.params is not None:
+                    markers = list(metafunc.definition.iter_markers("parametrize"))
+                    for parametrize_mark in markers:
+                        if "argnames" in parametrize_mark.kwargs:
+                            argnames = parametrize_mark.kwargs["argnames"]
+                        else:
+                            argnames = parametrize_mark.args[0]
+
+                        if not isinstance(argnames, (tuple, list)):
+                            argnames = [
+                                x.strip() for x in argnames.split(",") if x.strip()
+                            ]
+                        if argname in argnames:
+                            break
+                    else:
+                        metafunc.parametrize(
+                            argname,
+                            fixturedef.params,
+                            indirect=True,
+                            scope=fixturedef.scope,
+                            ids=fixturedef.ids,
+                        )
+            else:
+                continue  # will raise FixtureLookupError at setup time
+
+    def pytest_collection_modifyitems(self, items):
+        # separate parametrized setups
+        items[:] = reorder_items(items)
+
+    def parsefactories(self, node_or_obj, nodeid=NOTSET, unittest=False):
+        if nodeid is not NOTSET:
+            holderobj = node_or_obj
+        else:
+            holderobj = node_or_obj.obj
+            nodeid = node_or_obj.nodeid
+        if holderobj in self._holderobjseen:
+            return
+
+        self._holderobjseen.add(holderobj)
+        autousenames = []
+        for name in dir(holderobj):
+            # The attribute can be an arbitrary descriptor, so the attribute
+            # access below can raise. safe_getatt() ignores such exceptions.
+            obj = safe_getattr(holderobj, name, None)
+            marker = getfixturemarker(obj)
+            if not isinstance(marker, FixtureFunctionMarker):
+                # magic globals  with __getattr__ might have got us a wrong
+                # fixture attribute
+                continue
+
+            if marker.name:
+                name = marker.name
+
+            # during fixture definition we wrap the original fixture function
+            # to issue a warning if called directly, so here we unwrap it in order to not emit the warning
+            # when pytest itself calls the fixture function
+            if six.PY2 and unittest:
+                # hack on Python 2 because of the unbound methods
+                obj = get_real_func(obj)
+            else:
+                obj = get_real_method(obj, holderobj)
+
+            fixture_def = FixtureDef(
+                self,
+                nodeid,
+                name,
+                obj,
+                marker.scope,
+                marker.params,
+                unittest=unittest,
+                ids=marker.ids,
+            )
+
+            faclist = self._arg2fixturedefs.setdefault(name, [])
+            if fixture_def.has_location:
+                faclist.append(fixture_def)
+            else:
+                # fixturedefs with no location are at the front
+                # so this inserts the current fixturedef after the
+                # existing fixturedefs from external plugins but
+                # before the fixturedefs provided in conftests.
+                i = len([f for f in faclist if not f.has_location])
+                faclist.insert(i, fixture_def)
+            if marker.autouse:
+                autousenames.append(name)
+
+        if autousenames:
+            self._nodeid_and_autousenames.append((nodeid or "", autousenames))
+
+    def getfixturedefs(self, argname, nodeid):
+        """
+        Gets a list of fixtures which are applicable to the given node id.
+
+        :param str argname: name of the fixture to search for
+        :param str nodeid: full node id of the requesting test.
+        :return: list[FixtureDef]
+        """
+        try:
+            fixturedefs = self._arg2fixturedefs[argname]
+        except KeyError:
+            return None
+        return tuple(self._matchfactories(fixturedefs, nodeid))
+
+    def _matchfactories(self, fixturedefs, nodeid):
+        for fixturedef in fixturedefs:
+            if nodes.ischildnode(fixturedef.baseid, nodeid):
+                yield fixturedef
diff --git a/contrib/python/pytest/py2/_pytest/freeze_support.py b/contrib/python/pytest/py2/_pytest/freeze_support.py
new file mode 100644
index 0000000000..aeeec2a56b
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/freeze_support.py
@@ -0,0 +1,48 @@
+# -*- coding: utf-8 -*-
+"""
+Provides a function to report all internal modules for using freezing tools
+pytest
+"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+
+def freeze_includes():
+    """
+    Returns a list of module names used by pytest that should be
+    included by cx_freeze.
+    """
+    import py
+    import _pytest
+
+    result = list(_iter_all_modules(py))
+    result += list(_iter_all_modules(_pytest))
+    return result
+
+
+def _iter_all_modules(package, prefix=""):
+    """
+    Iterates over the names of all modules that can be found in the given
+    package, recursively.
+    Example:
+        _iter_all_modules(_pytest) ->
+            ['_pytest.assertion.newinterpret',
+             '_pytest.capture',
+             '_pytest.core',
+             ...
+            ]
+    """
+    import os
+    import pkgutil
+
+    if type(package) is not str:
+        path, prefix = package.__path__[0], package.__name__ + "."
+    else:
+        path = package
+    for _, name, is_package in pkgutil.iter_modules([path]):
+        if is_package:
+            for m in _iter_all_modules(os.path.join(path, name), prefix=name + "."):
+                yield prefix + m
+        else:
+            yield prefix + name
diff --git a/contrib/python/pytest/py2/_pytest/helpconfig.py b/contrib/python/pytest/py2/_pytest/helpconfig.py
new file mode 100644
index 0000000000..5681160160
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/helpconfig.py
@@ -0,0 +1,247 @@
+# -*- coding: utf-8 -*-
+""" version info, help messages, tracing configuration.  """
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import os
+import sys
+from argparse import Action
+
+import py
+
+import pytest
+from _pytest.config import PrintHelp
+
+
+class HelpAction(Action):
+    """This is an argparse Action that will raise an exception in
+    order to skip the rest of the argument parsing when --help is passed.
+    This prevents argparse from quitting due to missing required arguments
+    when any are defined, for example by ``pytest_addoption``.
+    This is similar to the way that the builtin argparse --help option is
+    implemented by raising SystemExit.
+    """
+
+    def __init__(self, option_strings, dest=None, default=False, help=None):
+        super(HelpAction, self).__init__(
+            option_strings=option_strings,
+            dest=dest,
+            const=True,
+            default=default,
+            nargs=0,
+            help=help,
+        )
+
+    def __call__(self, parser, namespace, values, option_string=None):
+        setattr(namespace, self.dest, self.const)
+
+        # We should only skip the rest of the parsing after preparse is done
+        if getattr(parser._parser, "after_preparse", False):
+            raise PrintHelp
+
+
+def pytest_addoption(parser):
+    group = parser.getgroup("debugconfig")
+    group.addoption(
+        "--version",
+        action="store_true",
+        help="display pytest lib version and import information.",
+    )
+    group._addoption(
+        "-h",
+        "--help",
+        action=HelpAction,
+        dest="help",
+        help="show help message and configuration info",
+    )
+    group._addoption(
+        "-p",
+        action="append",
+        dest="plugins",
+        default=[],
+        metavar="name",
+        help="early-load given plugin module name or entry point (multi-allowed). "
+        "To avoid loading of plugins, use the `no:` prefix, e.g. "
+        "`no:doctest`.",
+    )
+    group.addoption(
+        "--traceconfig",
+        "--trace-config",
+        action="store_true",
+        default=False,
+        help="trace considerations of conftest.py files.",
+    ),
+    group.addoption(
+        "--debug",
+        action="store_true",
+        dest="debug",
+        default=False,
+        help="store internal tracing debug information in 'pytestdebug.log'.",
+    )
+    group._addoption(
+        "-o",
+        "--override-ini",
+        dest="override_ini",
+        action="append",
+        help='override ini option with "option=value" style, e.g. `-o xfail_strict=True -o cache_dir=cache`.',
+    )
+
+
+@pytest.hookimpl(hookwrapper=True)
+def pytest_cmdline_parse():
+    outcome = yield
+    config = outcome.get_result()
+    if config.option.debug:
+        path = os.path.abspath("pytestdebug.log")
+        debugfile = open(path, "w")
+        debugfile.write(
+            "versions pytest-%s, py-%s, "
+            "python-%s\ncwd=%s\nargs=%s\n\n"
+            % (
+                pytest.__version__,
+                py.__version__,
+                ".".join(map(str, sys.version_info)),
+                os.getcwd(),
+                config._origargs,
+            )
+        )
+        config.trace.root.setwriter(debugfile.write)
+        undo_tracing = config.pluginmanager.enable_tracing()
+        sys.stderr.write("writing pytestdebug information to %s\n" % path)
+
+        def unset_tracing():
+            debugfile.close()
+            sys.stderr.write("wrote pytestdebug information to %s\n" % debugfile.name)
+            config.trace.root.setwriter(None)
+            undo_tracing()
+
+        config.add_cleanup(unset_tracing)
+
+
+def showversion(config):
+    p = py.path.local(pytest.__file__)
+    sys.stderr.write(
+        "This is pytest version %s, imported from %s\n" % (pytest.__version__, p)
+    )
+    plugininfo = getpluginversioninfo(config)
+    if plugininfo:
+        for line in plugininfo:
+            sys.stderr.write(line + "\n")
+
+
+def pytest_cmdline_main(config):
+    if config.option.version:
+        showversion(config)
+        return 0
+    elif config.option.help:
+        config._do_configure()
+        showhelp(config)
+        config._ensure_unconfigure()
+        return 0
+
+
+def showhelp(config):
+    import textwrap
+
+    reporter = config.pluginmanager.get_plugin("terminalreporter")
+    tw = reporter._tw
+    tw.write(config._parser.optparser.format_help())
+    tw.line()
+    tw.line(
+        "[pytest] ini-options in the first pytest.ini|tox.ini|setup.cfg file found:"
+    )
+    tw.line()
+
+    columns = tw.fullwidth  # costly call
+    indent_len = 24  # based on argparse's max_help_position=24
+    indent = " " * indent_len
+    for name in config._parser._ininames:
+        help, type, default = config._parser._inidict[name]
+        if type is None:
+            type = "string"
+        spec = "%s (%s):" % (name, type)
+        tw.write("  %s" % spec)
+        spec_len = len(spec)
+        if spec_len > (indent_len - 3):
+            # Display help starting at a new line.
+            tw.line()
+            helplines = textwrap.wrap(
+                help,
+                columns,
+                initial_indent=indent,
+                subsequent_indent=indent,
+                break_on_hyphens=False,
+            )
+
+            for line in helplines:
+                tw.line(line)
+        else:
+            # Display help starting after the spec, following lines indented.
+            tw.write(" " * (indent_len - spec_len - 2))
+            wrapped = textwrap.wrap(help, columns - indent_len, break_on_hyphens=False)
+
+            tw.line(wrapped[0])
+            for line in wrapped[1:]:
+                tw.line(indent + line)
+
+    tw.line()
+    tw.line("environment variables:")
+    vars = [
+        ("PYTEST_ADDOPTS", "extra command line options"),
+        ("PYTEST_PLUGINS", "comma-separated plugins to load during startup"),
+        ("PYTEST_DISABLE_PLUGIN_AUTOLOAD", "set to disable plugin auto-loading"),
+        ("PYTEST_DEBUG", "set to enable debug tracing of pytest's internals"),
+    ]
+    for name, help in vars:
+        tw.line("  %-24s %s" % (name, help))
+    tw.line()
+    tw.line()
+
+    tw.line("to see available markers type: pytest --markers")
+    tw.line("to see available fixtures type: pytest --fixtures")
+    tw.line(
+        "(shown according to specified file_or_dir or current dir "
+        "if not specified; fixtures with leading '_' are only shown "
+        "with the '-v' option"
+    )
+
+    for warningreport in reporter.stats.get("warnings", []):
+        tw.line("warning : " + warningreport.message, red=True)
+    return
+
+
+conftest_options = [("pytest_plugins", "list of plugin names to load")]
+
+
+def getpluginversioninfo(config):
+    lines = []
+    plugininfo = config.pluginmanager.list_plugin_distinfo()
+    if plugininfo:
+        lines.append("setuptools registered plugins:")
+        for plugin, dist in plugininfo:
+            loc = getattr(plugin, "__file__", repr(plugin))
+            content = "%s-%s at %s" % (dist.project_name, dist.version, loc)
+            lines.append("  " + content)
+    return lines
+
+
+def pytest_report_header(config):
+    lines = []
+    if config.option.debug or config.option.traceconfig:
+        lines.append("using: pytest-%s pylib-%s" % (pytest.__version__, py.__version__))
+
+        verinfo = getpluginversioninfo(config)
+        if verinfo:
+            lines.extend(verinfo)
+
+    if config.option.traceconfig:
+        lines.append("active plugins:")
+        items = config.pluginmanager.list_name_plugin()
+        for name, plugin in items:
+            if hasattr(plugin, "__file__"):
+                r = plugin.__file__
+            else:
+                r = repr(plugin)
+            lines.append("    %-20s: %s" % (name, r))
+    return lines
diff --git a/contrib/python/pytest/py2/_pytest/hookspec.py b/contrib/python/pytest/py2/_pytest/hookspec.py
new file mode 100644
index 0000000000..7ab6154b17
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/hookspec.py
@@ -0,0 +1,639 @@
+# -*- coding: utf-8 -*-
+""" hook specifications for pytest plugins, invoked from main.py and builtin plugins.  """
+from pluggy import HookspecMarker
+
+from _pytest.deprecated import PYTEST_LOGWARNING
+
+hookspec = HookspecMarker("pytest")
+
+# -------------------------------------------------------------------------
+# Initialization hooks called for every plugin
+# -------------------------------------------------------------------------
+
+
+@hookspec(historic=True)
+def pytest_addhooks(pluginmanager):
+    """called at plugin registration time to allow adding new hooks via a call to
+    ``pluginmanager.add_hookspecs(module_or_class, prefix)``.
+
+
+    :param _pytest.config.PytestPluginManager pluginmanager: pytest plugin manager
+
+    .. note::
+        This hook is incompatible with ``hookwrapper=True``.
+    """
+
+
+@hookspec(historic=True)
+def pytest_plugin_registered(plugin, manager):
+    """ a new pytest plugin got registered.
+
+    :param plugin: the plugin module or instance
+    :param _pytest.config.PytestPluginManager manager: pytest plugin manager
+
+    .. note::
+        This hook is incompatible with ``hookwrapper=True``.
+    """
+
+
+@hookspec(historic=True)
+def pytest_addoption(parser):
+    """register argparse-style options and ini-style config values,
+    called once at the beginning of a test run.
+
+    .. note::
+
+        This function should be implemented only in plugins or ``conftest.py``
+        files situated at the tests root directory due to how pytest
+        :ref:`discovers plugins during startup <pluginorder>`.
+
+    :arg _pytest.config.Parser parser: To add command line options, call
+        :py:func:`parser.addoption(...) <_pytest.config.Parser.addoption>`.
+        To add ini-file values call :py:func:`parser.addini(...)
+        <_pytest.config.Parser.addini>`.
+
+    Options can later be accessed through the
+    :py:class:`config <_pytest.config.Config>` object, respectively:
+
+    - :py:func:`config.getoption(name) <_pytest.config.Config.getoption>` to
+      retrieve the value of a command line option.
+
+    - :py:func:`config.getini(name) <_pytest.config.Config.getini>` to retrieve
+      a value read from an ini-style file.
+
+    The config object is passed around on many internal objects via the ``.config``
+    attribute or can be retrieved as the ``pytestconfig`` fixture.
+
+    .. note::
+        This hook is incompatible with ``hookwrapper=True``.
+    """
+
+
+@hookspec(historic=True)
+def pytest_configure(config):
+    """
+    Allows plugins and conftest files to perform initial configuration.
+
+    This hook is called for every plugin and initial conftest file
+    after command line options have been parsed.
+
+    After that, the hook is called for other conftest files as they are
+    imported.
+
+    .. note::
+        This hook is incompatible with ``hookwrapper=True``.
+
+    :arg _pytest.config.Config config: pytest config object
+    """
+
+
+# -------------------------------------------------------------------------
+# Bootstrapping hooks called for plugins registered early enough:
+# internal and 3rd party plugins.
+# -------------------------------------------------------------------------
+
+
+@hookspec(firstresult=True)
+def pytest_cmdline_parse(pluginmanager, args):
+    """return initialized config object, parsing the specified args.
+
+    Stops at first non-None result, see :ref:`firstresult`
+
+    .. note::
+        This hook will only be called for plugin classes passed to the ``plugins`` arg when using `pytest.main`_ to
+        perform an in-process test run.
+
+    :param _pytest.config.PytestPluginManager pluginmanager: pytest plugin manager
+    :param list[str] args: list of arguments passed on the command line
+    """
+
+
+def pytest_cmdline_preparse(config, args):
+    """(**Deprecated**) modify command line arguments before option parsing.
+
+    This hook is considered deprecated and will be removed in a future pytest version. Consider
+    using :func:`pytest_load_initial_conftests` instead.
+
+    .. note::
+        This hook will not be called for ``conftest.py`` files, only for setuptools plugins.
+
+    :param _pytest.config.Config config: pytest config object
+    :param list[str] args: list of arguments passed on the command line
+    """
+
+
+@hookspec(firstresult=True)
+def pytest_cmdline_main(config):
+    """ called for performing the main command line action. The default
+    implementation will invoke the configure hooks and runtest_mainloop.
+
+    .. note::
+        This hook will not be called for ``conftest.py`` files, only for setuptools plugins.
+
+    Stops at first non-None result, see :ref:`firstresult`
+
+    :param _pytest.config.Config config: pytest config object
+    """
+
+
+def pytest_load_initial_conftests(early_config, parser, args):
+    """ implements the loading of initial conftest files ahead
+    of command line option parsing.
+
+    .. note::
+        This hook will not be called for ``conftest.py`` files, only for setuptools plugins.
+
+    :param _pytest.config.Config early_config: pytest config object
+    :param list[str] args: list of arguments passed on the command line
+    :param _pytest.config.Parser parser: to add command line options
+    """
+
+
+# -------------------------------------------------------------------------
+# collection hooks
+# -------------------------------------------------------------------------
+
+
+@hookspec(firstresult=True)
+def pytest_collection(session):
+    """Perform the collection protocol for the given session.
+
+    Stops at first non-None result, see :ref:`firstresult`.
+
+    :param _pytest.main.Session session: the pytest session object
+    """
+
+
+def pytest_collection_modifyitems(session, config, items):
+    """ called after collection has been performed, may filter or re-order
+    the items in-place.
+
+    :param _pytest.main.Session session: the pytest session object
+    :param _pytest.config.Config config: pytest config object
+    :param List[_pytest.nodes.Item] items: list of item objects
+    """
+
+
+def pytest_collection_finish(session):
+    """ called after collection has been performed and modified.
+
+    :param _pytest.main.Session session: the pytest session object
+    """
+
+
+@hookspec(firstresult=True)
+def pytest_ignore_collect(path, config):
+    """ return True to prevent considering this path for collection.
+    This hook is consulted for all files and directories prior to calling
+    more specific hooks.
+
+    Stops at first non-None result, see :ref:`firstresult`
+
+    :param path: a :py:class:`py.path.local` - the path to analyze
+    :param _pytest.config.Config config: pytest config object
+    """
+
+
+@hookspec(firstresult=True)
+def pytest_collect_directory(path, parent):
+    """ called before traversing a directory for collection files.
+
+    Stops at first non-None result, see :ref:`firstresult`
+
+    :param path: a :py:class:`py.path.local` - the path to analyze
+    """
+
+
+def pytest_collect_file(path, parent):
+    """ return collection Node or None for the given path. Any new node
+    needs to have the specified ``parent`` as a parent.
+
+    :param path: a :py:class:`py.path.local` - the path to collect
+    """
+
+
+# logging hooks for collection
+
+
+def pytest_collectstart(collector):
+    """ collector starts collecting. """
+
+
+def pytest_itemcollected(item):
+    """ we just collected a test item. """
+
+
+def pytest_collectreport(report):
+    """ collector finished collecting. """
+
+
+def pytest_deselected(items):
+    """ called for test items deselected, e.g. by keyword. """
+
+
+@hookspec(firstresult=True)
+def pytest_make_collect_report(collector):
+    """ perform ``collector.collect()`` and return a CollectReport.
+
+    Stops at first non-None result, see :ref:`firstresult` """
+
+
+# -------------------------------------------------------------------------
+# Python test function related hooks
+# -------------------------------------------------------------------------
+
+
+@hookspec(firstresult=True)
+def pytest_pycollect_makemodule(path, parent):
+    """ return a Module collector or None for the given path.
+    This hook will be called for each matching test module path.
+    The pytest_collect_file hook needs to be used if you want to
+    create test modules for files that do not match as a test module.
+
+    Stops at first non-None result, see :ref:`firstresult`
+
+    :param path: a :py:class:`py.path.local` - the path of module to collect
+    """
+
+
+@hookspec(firstresult=True)
+def pytest_pycollect_makeitem(collector, name, obj):
+    """ return custom item/collector for a python object in a module, or None.
+
+    Stops at first non-None result, see :ref:`firstresult` """
+
+
+@hookspec(firstresult=True)
+def pytest_pyfunc_call(pyfuncitem):
+    """ call underlying test function.
+
+    Stops at first non-None result, see :ref:`firstresult` """
+
+
+def pytest_generate_tests(metafunc):
+    """ generate (multiple) parametrized calls to a test function."""
+
+
+@hookspec(firstresult=True)
+def pytest_make_parametrize_id(config, val, argname):
+    """Return a user-friendly string representation of the given ``val`` that will be used
+    by @pytest.mark.parametrize calls. Return None if the hook doesn't know about ``val``.
+    The parameter name is available as ``argname``, if required.
+
+    Stops at first non-None result, see :ref:`firstresult`
+
+    :param _pytest.config.Config config: pytest config object
+    :param val: the parametrized value
+    :param str argname: the automatic parameter name produced by pytest
+    """
+
+
+# -------------------------------------------------------------------------
+# generic runtest related hooks
+# -------------------------------------------------------------------------
+
+
+@hookspec(firstresult=True)
+def pytest_runtestloop(session):
+    """ called for performing the main runtest loop
+    (after collection finished).
+
+    Stops at first non-None result, see :ref:`firstresult`
+
+    :param _pytest.main.Session session: the pytest session object
+    """
+
+
+def pytest_itemstart(item, node):
+    """(**Deprecated**) use pytest_runtest_logstart. """
+
+
+@hookspec(firstresult=True)
+def pytest_runtest_protocol(item, nextitem):
+    """ implements the runtest_setup/call/teardown protocol for
+    the given test item, including capturing exceptions and calling
+    reporting hooks.
+
+    :arg item: test item for which the runtest protocol is performed.
+
+    :arg nextitem: the scheduled-to-be-next test item (or None if this
+                   is the end my friend).  This argument is passed on to
+                   :py:func:`pytest_runtest_teardown`.
+
+    :return boolean: True if no further hook implementations should be invoked.
+
+
+    Stops at first non-None result, see :ref:`firstresult` """
+
+
+def pytest_runtest_logstart(nodeid, location):
+    """ signal the start of running a single test item.
+
+    This hook will be called **before** :func:`pytest_runtest_setup`, :func:`pytest_runtest_call` and
+    :func:`pytest_runtest_teardown` hooks.
+
+    :param str nodeid: full id of the item
+    :param location: a triple of ``(filename, linenum, testname)``
+    """
+
+
+def pytest_runtest_logfinish(nodeid, location):
+    """ signal the complete finish of running a single test item.
+
+    This hook will be called **after** :func:`pytest_runtest_setup`, :func:`pytest_runtest_call` and
+    :func:`pytest_runtest_teardown` hooks.
+
+    :param str nodeid: full id of the item
+    :param location: a triple of ``(filename, linenum, testname)``
+    """
+
+
+def pytest_runtest_setup(item):
+    """ called before ``pytest_runtest_call(item)``. """
+
+
+def pytest_runtest_call(item):
+    """ called to execute the test ``item``. """
+
+
+def pytest_runtest_teardown(item, nextitem):
+    """ called after ``pytest_runtest_call``.
+
+    :arg nextitem: the scheduled-to-be-next test item (None if no further
+                   test item is scheduled).  This argument can be used to
+                   perform exact teardowns, i.e. calling just enough finalizers
+                   so that nextitem only needs to call setup-functions.
+    """
+
+
+@hookspec(firstresult=True)
+def pytest_runtest_makereport(item, call):
+    """ return a :py:class:`_pytest.runner.TestReport` object
+    for the given :py:class:`pytest.Item <_pytest.main.Item>` and
+    :py:class:`_pytest.runner.CallInfo`.
+
+    Stops at first non-None result, see :ref:`firstresult` """
+
+
+def pytest_runtest_logreport(report):
+    """ process a test setup/call/teardown report relating to
+    the respective phase of executing a test. """
+
+
+@hookspec(firstresult=True)
+def pytest_report_to_serializable(config, report):
+    """
+    .. warning::
+        This hook is experimental and subject to change between pytest releases, even
+        bug fixes.
+
+        The intent is for this to be used by plugins maintained by the core-devs, such
+        as ``pytest-xdist``, ``pytest-subtests``, and as a replacement for the internal
+        'resultlog' plugin.
+
+        In the future it might become part of the public hook API.
+
+    Serializes the given report object into a data structure suitable for sending
+    over the wire, e.g. converted to JSON.
+    """
+
+
+@hookspec(firstresult=True)
+def pytest_report_from_serializable(config, data):
+    """
+    .. warning::
+        This hook is experimental and subject to change between pytest releases, even
+        bug fixes.
+
+        The intent is for this to be used by plugins maintained by the core-devs, such
+        as ``pytest-xdist``, ``pytest-subtests``, and as a replacement for the internal
+        'resultlog' plugin.
+
+        In the future it might become part of the public hook API.
+
+    Restores a report object previously serialized with pytest_report_to_serializable().
+    """
+
+
+# -------------------------------------------------------------------------
+# Fixture related hooks
+# -------------------------------------------------------------------------
+
+
+@hookspec(firstresult=True)
+def pytest_fixture_setup(fixturedef, request):
+    """ performs fixture setup execution.
+
+    :return: The return value of the call to the fixture function
+
+    Stops at first non-None result, see :ref:`firstresult`
+
+    .. note::
+        If the fixture function returns None, other implementations of
+        this hook function will continue to be called, according to the
+        behavior of the :ref:`firstresult` option.
+    """
+
+
+def pytest_fixture_post_finalizer(fixturedef, request):
+    """ called after fixture teardown, but before the cache is cleared so
+    the fixture result cache ``fixturedef.cached_result`` can
+    still be accessed."""
+
+
+# -------------------------------------------------------------------------
+# test session related hooks
+# -------------------------------------------------------------------------
+
+
+def pytest_sessionstart(session):
+    """ called after the ``Session`` object has been created and before performing collection
+    and entering the run test loop.
+
+    :param _pytest.main.Session session: the pytest session object
+    """
+
+
+def pytest_sessionfinish(session, exitstatus):
+    """ called after whole test run finished, right before returning the exit status to the system.
+
+    :param _pytest.main.Session session: the pytest session object
+    :param int exitstatus: the status which pytest will return to the system
+    """
+
+
+def pytest_unconfigure(config):
+    """ called before test process is exited.
+
+    :param _pytest.config.Config config: pytest config object
+    """
+
+
+# -------------------------------------------------------------------------
+# hooks for customizing the assert methods
+# -------------------------------------------------------------------------
+
+
+def pytest_assertrepr_compare(config, op, left, right):
+    """return explanation for comparisons in failing assert expressions.
+
+    Return None for no custom explanation, otherwise return a list
+    of strings.  The strings will be joined by newlines but any newlines
+    *in* a string will be escaped.  Note that all but the first line will
+    be indented slightly, the intention is for the first line to be a summary.
+
+    :param _pytest.config.Config config: pytest config object
+    """
+
+
+# -------------------------------------------------------------------------
+# hooks for influencing reporting (invoked from _pytest_terminal)
+# -------------------------------------------------------------------------
+
+
+def pytest_report_header(config, startdir):
+    """ return a string or list of strings to be displayed as header info for terminal reporting.
+
+    :param _pytest.config.Config config: pytest config object
+    :param startdir: py.path object with the starting dir
+
+    .. note::
+
+        This function should be implemented only in plugins or ``conftest.py``
+        files situated at the tests root directory due to how pytest
+        :ref:`discovers plugins during startup <pluginorder>`.
+    """
+
+
+def pytest_report_collectionfinish(config, startdir, items):
+    """
+    .. versionadded:: 3.2
+
+    return a string or list of strings to be displayed after collection has finished successfully.
+
+    This strings will be displayed after the standard "collected X items" message.
+
+    :param _pytest.config.Config config: pytest config object
+    :param startdir: py.path object with the starting dir
+    :param items: list of pytest items that are going to be executed; this list should not be modified.
+    """
+
+
+@hookspec(firstresult=True)
+def pytest_report_teststatus(report, config):
+    """ return result-category, shortletter and verbose word for reporting.
+
+    :param _pytest.config.Config config: pytest config object
+
+    Stops at first non-None result, see :ref:`firstresult` """
+
+
+def pytest_terminal_summary(terminalreporter, exitstatus, config):
+    """Add a section to terminal summary reporting.
+
+    :param _pytest.terminal.TerminalReporter terminalreporter: the internal terminal reporter object
+    :param int exitstatus: the exit status that will be reported back to the OS
+    :param _pytest.config.Config config: pytest config object
+
+    .. versionadded:: 4.2
+        The ``config`` parameter.
+    """
+
+
+@hookspec(historic=True, warn_on_impl=PYTEST_LOGWARNING)
+def pytest_logwarning(message, code, nodeid, fslocation):
+    """
+    .. deprecated:: 3.8
+
+        This hook is will stop working in a future release.
+
+        pytest no longer triggers this hook, but the
+        terminal writer still implements it to display warnings issued by
+        :meth:`_pytest.config.Config.warn` and :meth:`_pytest.nodes.Node.warn`. Calling those functions will be
+        an error in future releases.
+
+    process a warning specified by a message, a code string,
+    a nodeid and fslocation (both of which may be None
+    if the warning is not tied to a particular node/location).
+
+    .. note::
+        This hook is incompatible with ``hookwrapper=True``.
+    """
+
+
+@hookspec(historic=True)
+def pytest_warning_captured(warning_message, when, item):
+    """
+    Process a warning captured by the internal pytest warnings plugin.
+
+    :param warnings.WarningMessage warning_message:
+        The captured warning. This is the same object produced by :py:func:`warnings.catch_warnings`, and contains
+        the same attributes as the parameters of :py:func:`warnings.showwarning`.
+
+    :param str when:
+        Indicates when the warning was captured. Possible values:
+
+        * ``"config"``: during pytest configuration/initialization stage.
+        * ``"collect"``: during test collection.
+        * ``"runtest"``: during test execution.
+
+    :param pytest.Item|None item:
+        **DEPRECATED**: This parameter is incompatible with ``pytest-xdist``, and will always receive ``None``
+        in a future release.
+
+        The item being executed if ``when`` is ``"runtest"``, otherwise ``None``.
+    """
+
+
+# -------------------------------------------------------------------------
+# doctest hooks
+# -------------------------------------------------------------------------
+
+
+@hookspec(firstresult=True)
+def pytest_doctest_prepare_content(content):
+    """ return processed content for a given doctest
+
+    Stops at first non-None result, see :ref:`firstresult` """
+
+
+# -------------------------------------------------------------------------
+# error handling and internal debugging hooks
+# -------------------------------------------------------------------------
+
+
+def pytest_internalerror(excrepr, excinfo):
+    """ called for internal errors. """
+
+
+def pytest_keyboard_interrupt(excinfo):
+    """ called for keyboard interrupt. """
+
+
+def pytest_exception_interact(node, call, report):
+    """called when an exception was raised which can potentially be
+    interactively handled.
+
+    This hook is only called if an exception was raised
+    that is not an internal exception like ``skip.Exception``.
+    """
+
+
+def pytest_enter_pdb(config, pdb):
+    """ called upon pdb.set_trace(), can be used by plugins to take special
+    action just before the python debugger enters in interactive mode.
+
+    :param _pytest.config.Config config: pytest config object
+    :param pdb.Pdb pdb: Pdb instance
+    """
+
+
+def pytest_leave_pdb(config, pdb):
+    """ called when leaving pdb (e.g. with continue after pdb.set_trace()).
+
+    Can be used by plugins to take special action just after the python
+    debugger leaves interactive mode.
+
+    :param _pytest.config.Config config: pytest config object
+    :param pdb.Pdb pdb: Pdb instance
+    """
diff --git a/contrib/python/pytest/py2/_pytest/junitxml.py b/contrib/python/pytest/py2/_pytest/junitxml.py
new file mode 100644
index 0000000000..853dcb7744
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/junitxml.py
@@ -0,0 +1,707 @@
+# -*- coding: utf-8 -*-
+"""
+    report test results in JUnit-XML format,
+    for use with Jenkins and build integration servers.
+
+
+Based on initial code from Ross Lawley.
+
+Output conforms to https://github.com/jenkinsci/xunit-plugin/blob/master/
+src/main/resources/org/jenkinsci/plugins/xunit/types/model/xsd/junit-10.xsd
+"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import functools
+import os
+import platform
+import re
+import sys
+import time
+from datetime import datetime
+
+import py
+import six
+
+import pytest
+from _pytest import nodes
+from _pytest.config import filename_arg
+
+# Python 2.X and 3.X compatibility
+if sys.version_info[0] < 3:
+    from codecs import open
+
+
+class Junit(py.xml.Namespace):
+    pass
+
+
+# We need to get the subset of the invalid unicode ranges according to
+# XML 1.0 which are valid in this python build.  Hence we calculate
+# this dynamically instead of hardcoding it.  The spec range of valid
+# chars is: Char ::= #x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD]
+#                    | [#x10000-#x10FFFF]
+_legal_chars = (0x09, 0x0A, 0x0D)
+_legal_ranges = ((0x20, 0x7E), (0x80, 0xD7FF), (0xE000, 0xFFFD), (0x10000, 0x10FFFF))
+_legal_xml_re = [
+    u"%s-%s" % (six.unichr(low), six.unichr(high))
+    for (low, high) in _legal_ranges
+    if low < sys.maxunicode
+]
+_legal_xml_re = [six.unichr(x) for x in _legal_chars] + _legal_xml_re
+illegal_xml_re = re.compile(u"[^%s]" % u"".join(_legal_xml_re))
+del _legal_chars
+del _legal_ranges
+del _legal_xml_re
+
+_py_ext_re = re.compile(r"\.py$")
+
+
+def bin_xml_escape(arg):
+    def repl(matchobj):
+        i = ord(matchobj.group())
+        if i <= 0xFF:
+            return u"#x%02X" % i
+        else:
+            return u"#x%04X" % i
+
+    return py.xml.raw(illegal_xml_re.sub(repl, py.xml.escape(arg)))
+
+
+def merge_family(left, right):
+    result = {}
+    for kl, vl in left.items():
+        for kr, vr in right.items():
+            if not isinstance(vl, list):
+                raise TypeError(type(vl))
+            result[kl] = vl + vr
+    left.update(result)
+
+
+families = {}
+families["_base"] = {"testcase": ["classname", "name"]}
+families["_base_legacy"] = {"testcase": ["file", "line", "url"]}
+
+# xUnit 1.x inherits legacy attributes
+families["xunit1"] = families["_base"].copy()
+merge_family(families["xunit1"], families["_base_legacy"])
+
+# xUnit 2.x uses strict base attributes
+families["xunit2"] = families["_base"]
+
+
+class _NodeReporter(object):
+    def __init__(self, nodeid, xml):
+        self.id = nodeid
+        self.xml = xml
+        self.add_stats = self.xml.add_stats
+        self.family = self.xml.family
+        self.duration = 0
+        self.properties = []
+        self.nodes = []
+        self.testcase = None
+        self.attrs = {}
+
+    def append(self, node):
+        self.xml.add_stats(type(node).__name__)
+        self.nodes.append(node)
+
+    def add_property(self, name, value):
+        self.properties.append((str(name), bin_xml_escape(value)))
+
+    def add_attribute(self, name, value):
+        self.attrs[str(name)] = bin_xml_escape(value)
+
+    def make_properties_node(self):
+        """Return a Junit node containing custom properties, if any.
+        """
+        if self.properties:
+            return Junit.properties(
+                [
+                    Junit.property(name=name, value=value)
+                    for name, value in self.properties
+                ]
+            )
+        return ""
+
+    def record_testreport(self, testreport):
+        assert not self.testcase
+        names = mangle_test_address(testreport.nodeid)
+        existing_attrs = self.attrs
+        classnames = names[:-1]
+        if self.xml.prefix:
+            classnames.insert(0, self.xml.prefix)
+        attrs = {
+            "classname": ".".join(classnames),
+            "name": bin_xml_escape(names[-1]),
+            "file": testreport.location[0],
+        }
+        if testreport.location[1] is not None:
+            attrs["line"] = testreport.location[1]
+        if hasattr(testreport, "url"):
+            attrs["url"] = testreport.url
+        self.attrs = attrs
+        self.attrs.update(existing_attrs)  # restore any user-defined attributes
+
+        # Preserve legacy testcase behavior
+        if self.family == "xunit1":
+            return
+
+        # Filter out attributes not permitted by this test family.
+        # Including custom attributes because they are not valid here.
+        temp_attrs = {}
+        for key in self.attrs.keys():
+            if key in families[self.family]["testcase"]:
+                temp_attrs[key] = self.attrs[key]
+        self.attrs = temp_attrs
+
+    def to_xml(self):
+        testcase = Junit.testcase(time="%.3f" % self.duration, **self.attrs)
+        testcase.append(self.make_properties_node())
+        for node in self.nodes:
+            testcase.append(node)
+        return testcase
+
+    def _add_simple(self, kind, message, data=None):
+        data = bin_xml_escape(data)
+        node = kind(data, message=message)
+        self.append(node)
+
+    def write_captured_output(self, report):
+        if not self.xml.log_passing_tests and report.passed:
+            return
+
+        content_out = report.capstdout
+        content_log = report.caplog
+        content_err = report.capstderr
+
+        if content_log or content_out:
+            if content_log and self.xml.logging == "system-out":
+                if content_out:
+                    # syncing stdout and the log-output is not done yet. It's
+                    # probably not worth the effort. Therefore, first the captured
+                    # stdout is shown and then the captured logs.
+                    content = "\n".join(
+                        [
+                            " Captured Stdout ".center(80, "-"),
+                            content_out,
+                            "",
+                            " Captured Log ".center(80, "-"),
+                            content_log,
+                        ]
+                    )
+                else:
+                    content = content_log
+            else:
+                content = content_out
+
+            if content:
+                tag = getattr(Junit, "system-out")
+                self.append(tag(bin_xml_escape(content)))
+
+        if content_log or content_err:
+            if content_log and self.xml.logging == "system-err":
+                if content_err:
+                    content = "\n".join(
+                        [
+                            " Captured Stderr ".center(80, "-"),
+                            content_err,
+                            "",
+                            " Captured Log ".center(80, "-"),
+                            content_log,
+                        ]
+                    )
+                else:
+                    content = content_log
+            else:
+                content = content_err
+
+            if content:
+                tag = getattr(Junit, "system-err")
+                self.append(tag(bin_xml_escape(content)))
+
+    def append_pass(self, report):
+        self.add_stats("passed")
+
+    def append_failure(self, report):
+        # msg = str(report.longrepr.reprtraceback.extraline)
+        if hasattr(report, "wasxfail"):
+            self._add_simple(Junit.skipped, "xfail-marked test passes unexpectedly")
+        else:
+            if hasattr(report.longrepr, "reprcrash"):
+                message = report.longrepr.reprcrash.message
+            elif isinstance(report.longrepr, six.string_types):
+                message = report.longrepr
+            else:
+                message = str(report.longrepr)
+            message = bin_xml_escape(message)
+            fail = Junit.failure(message=message)
+            fail.append(bin_xml_escape(report.longrepr))
+            self.append(fail)
+
+    def append_collect_error(self, report):
+        # msg = str(report.longrepr.reprtraceback.extraline)
+        self.append(
+            Junit.error(bin_xml_escape(report.longrepr), message="collection failure")
+        )
+
+    def append_collect_skipped(self, report):
+        self._add_simple(Junit.skipped, "collection skipped", report.longrepr)
+
+    def append_error(self, report):
+        if report.when == "teardown":
+            msg = "test teardown failure"
+        else:
+            msg = "test setup failure"
+        self._add_simple(Junit.error, msg, report.longrepr)
+
+    def append_skipped(self, report):
+        if hasattr(report, "wasxfail"):
+            xfailreason = report.wasxfail
+            if xfailreason.startswith("reason: "):
+                xfailreason = xfailreason[8:]
+            self.append(
+                Junit.skipped(
+                    "", type="pytest.xfail", message=bin_xml_escape(xfailreason)
+                )
+            )
+        else:
+            filename, lineno, skipreason = report.longrepr
+            if skipreason.startswith("Skipped: "):
+                skipreason = skipreason[9:]
+            details = "%s:%s: %s" % (filename, lineno, skipreason)
+
+            self.append(
+                Junit.skipped(
+                    bin_xml_escape(details),
+                    type="pytest.skip",
+                    message=bin_xml_escape(skipreason),
+                )
+            )
+            self.write_captured_output(report)
+
+    def finalize(self):
+        data = self.to_xml().unicode(indent=0)
+        self.__dict__.clear()
+        self.to_xml = lambda: py.xml.raw(data)
+
+
+def _warn_incompatibility_with_xunit2(request, fixture_name):
+    """Emits a PytestWarning about the given fixture being incompatible with newer xunit revisions"""
+    from _pytest.warning_types import PytestWarning
+
+    xml = getattr(request.config, "_xml", None)
+    if xml is not None and xml.family not in ("xunit1", "legacy"):
+        request.node.warn(
+            PytestWarning(
+                "{fixture_name} is incompatible with junit_family '{family}' (use 'legacy' or 'xunit1')".format(
+                    fixture_name=fixture_name, family=xml.family
+                )
+            )
+        )
+
+
+@pytest.fixture
+def record_property(request):
+    """Add an extra properties the calling test.
+    User properties become part of the test report and are available to the
+    configured reporters, like JUnit XML.
+    The fixture is callable with ``(name, value)``, with value being automatically
+    xml-encoded.
+
+    Example::
+
+        def test_function(record_property):
+            record_property("example_key", 1)
+    """
+    _warn_incompatibility_with_xunit2(request, "record_property")
+
+    def append_property(name, value):
+        request.node.user_properties.append((name, value))
+
+    return append_property
+
+
+@pytest.fixture
+def record_xml_attribute(request):
+    """Add extra xml attributes to the tag for the calling test.
+    The fixture is callable with ``(name, value)``, with value being
+    automatically xml-encoded
+    """
+    from _pytest.warning_types import PytestExperimentalApiWarning
+
+    request.node.warn(
+        PytestExperimentalApiWarning("record_xml_attribute is an experimental feature")
+    )
+
+    _warn_incompatibility_with_xunit2(request, "record_xml_attribute")
+
+    # Declare noop
+    def add_attr_noop(name, value):
+        pass
+
+    attr_func = add_attr_noop
+
+    xml = getattr(request.config, "_xml", None)
+    if xml is not None:
+        node_reporter = xml.node_reporter(request.node.nodeid)
+        attr_func = node_reporter.add_attribute
+
+    return attr_func
+
+
+def _check_record_param_type(param, v):
+    """Used by record_testsuite_property to check that the given parameter name is of the proper
+    type"""
+    __tracebackhide__ = True
+    if not isinstance(v, six.string_types):
+        msg = "{param} parameter needs to be a string, but {g} given"
+        raise TypeError(msg.format(param=param, g=type(v).__name__))
+
+
+@pytest.fixture(scope="session")
+def record_testsuite_property(request):
+    """
+    Records a new ``<property>`` tag as child of the root ``<testsuite>``. This is suitable to
+    writing global information regarding the entire test suite, and is compatible with ``xunit2`` JUnit family.
+
+    This is a ``session``-scoped fixture which is called with ``(name, value)``. Example:
+
+    .. code-block:: python
+
+        def test_foo(record_testsuite_property):
+            record_testsuite_property("ARCH", "PPC")
+            record_testsuite_property("STORAGE_TYPE", "CEPH")
+
+    ``name`` must be a string, ``value`` will be converted to a string and properly xml-escaped.
+    """
+
+    __tracebackhide__ = True
+
+    def record_func(name, value):
+        """noop function in case --junitxml was not passed in the command-line"""
+        __tracebackhide__ = True
+        _check_record_param_type("name", name)
+
+    xml = getattr(request.config, "_xml", None)
+    if xml is not None:
+        record_func = xml.add_global_property  # noqa
+    return record_func
+
+
+def pytest_addoption(parser):
+    group = parser.getgroup("terminal reporting")
+    group.addoption(
+        "--junitxml",
+        "--junit-xml",
+        action="store",
+        dest="xmlpath",
+        metavar="path",
+        type=functools.partial(filename_arg, optname="--junitxml"),
+        default=None,
+        help="create junit-xml style report file at given path.",
+    )
+    group.addoption(
+        "--junitprefix",
+        "--junit-prefix",
+        action="store",
+        metavar="str",
+        default=None,
+        help="prepend prefix to classnames in junit-xml output",
+    )
+    parser.addini(
+        "junit_suite_name", "Test suite name for JUnit report", default="pytest"
+    )
+    parser.addini(
+        "junit_logging",
+        "Write captured log messages to JUnit report: "
+        "one of no|system-out|system-err",
+        default="no",
+    )  # choices=['no', 'stdout', 'stderr'])
+    parser.addini(
+        "junit_log_passing_tests",
+        "Capture log information for passing tests to JUnit report: ",
+        type="bool",
+        default=True,
+    )
+    parser.addini(
+        "junit_duration_report",
+        "Duration time to report: one of total|call",
+        default="total",
+    )  # choices=['total', 'call'])
+    parser.addini(
+        "junit_family",
+        "Emit XML for schema: one of legacy|xunit1|xunit2",
+        default="xunit1",
+    )
+
+
+def pytest_configure(config):
+    xmlpath = config.option.xmlpath
+    # prevent opening xmllog on slave nodes (xdist)
+    if xmlpath and not hasattr(config, "slaveinput"):
+        config._xml = LogXML(
+            xmlpath,
+            config.option.junitprefix,
+            config.getini("junit_suite_name"),
+            config.getini("junit_logging"),
+            config.getini("junit_duration_report"),
+            config.getini("junit_family"),
+            config.getini("junit_log_passing_tests"),
+        )
+        config.pluginmanager.register(config._xml)
+
+
+def pytest_unconfigure(config):
+    xml = getattr(config, "_xml", None)
+    if xml:
+        del config._xml
+        config.pluginmanager.unregister(xml)
+
+
+def mangle_test_address(address):
+    path, possible_open_bracket, params = address.partition("[")
+    names = path.split("::")
+    try:
+        names.remove("()")
+    except ValueError:
+        pass
+    # convert file path to dotted path
+    names[0] = names[0].replace(nodes.SEP, ".")
+    names[0] = _py_ext_re.sub("", names[0])
+    # put any params back
+    names[-1] += possible_open_bracket + params
+    return names
+
+
+class LogXML(object):
+    def __init__(
+        self,
+        logfile,
+        prefix,
+        suite_name="pytest",
+        logging="no",
+        report_duration="total",
+        family="xunit1",
+        log_passing_tests=True,
+    ):
+        logfile = os.path.expanduser(os.path.expandvars(logfile))
+        self.logfile = os.path.normpath(os.path.abspath(logfile))
+        self.prefix = prefix
+        self.suite_name = suite_name
+        self.logging = logging
+        self.log_passing_tests = log_passing_tests
+        self.report_duration = report_duration
+        self.family = family
+        self.stats = dict.fromkeys(["error", "passed", "failure", "skipped"], 0)
+        self.node_reporters = {}  # nodeid -> _NodeReporter
+        self.node_reporters_ordered = []
+        self.global_properties = []
+
+        # List of reports that failed on call but teardown is pending.
+        self.open_reports = []
+        self.cnt_double_fail_tests = 0
+
+        # Replaces convenience family with real family
+        if self.family == "legacy":
+            self.family = "xunit1"
+
+    def finalize(self, report):
+        nodeid = getattr(report, "nodeid", report)
+        # local hack to handle xdist report order
+        slavenode = getattr(report, "node", None)
+        reporter = self.node_reporters.pop((nodeid, slavenode))
+        if reporter is not None:
+            reporter.finalize()
+
+    def node_reporter(self, report):
+        nodeid = getattr(report, "nodeid", report)
+        # local hack to handle xdist report order
+        slavenode = getattr(report, "node", None)
+
+        key = nodeid, slavenode
+
+        if key in self.node_reporters:
+            # TODO: breasks for --dist=each
+            return self.node_reporters[key]
+
+        reporter = _NodeReporter(nodeid, self)
+
+        self.node_reporters[key] = reporter
+        self.node_reporters_ordered.append(reporter)
+
+        return reporter
+
+    def add_stats(self, key):
+        if key in self.stats:
+            self.stats[key] += 1
+
+    def _opentestcase(self, report):
+        reporter = self.node_reporter(report)
+        reporter.record_testreport(report)
+        return reporter
+
+    def pytest_runtest_logreport(self, report):
+        """handle a setup/call/teardown report, generating the appropriate
+        xml tags as necessary.
+
+        note: due to plugins like xdist, this hook may be called in interlaced
+        order with reports from other nodes. for example:
+
+        usual call order:
+            -> setup node1
+            -> call node1
+            -> teardown node1
+            -> setup node2
+            -> call node2
+            -> teardown node2
+
+        possible call order in xdist:
+            -> setup node1
+            -> call node1
+            -> setup node2
+            -> call node2
+            -> teardown node2
+            -> teardown node1
+        """
+        close_report = None
+        if report.passed:
+            if report.when == "call":  # ignore setup/teardown
+                reporter = self._opentestcase(report)
+                reporter.append_pass(report)
+        elif report.failed:
+            if report.when == "teardown":
+                # The following vars are needed when xdist plugin is used
+                report_wid = getattr(report, "worker_id", None)
+                report_ii = getattr(report, "item_index", None)
+                close_report = next(
+                    (
+                        rep
+                        for rep in self.open_reports
+                        if (
+                            rep.nodeid == report.nodeid
+                            and getattr(rep, "item_index", None) == report_ii
+                            and getattr(rep, "worker_id", None) == report_wid
+                        )
+                    ),
+                    None,
+                )
+                if close_report:
+                    # We need to open new testcase in case we have failure in
+                    # call and error in teardown in order to follow junit
+                    # schema
+                    self.finalize(close_report)
+                    self.cnt_double_fail_tests += 1
+            reporter = self._opentestcase(report)
+            if report.when == "call":
+                reporter.append_failure(report)
+                self.open_reports.append(report)
+                if not self.log_passing_tests:
+                    reporter.write_captured_output(report)
+            else:
+                reporter.append_error(report)
+        elif report.skipped:
+            reporter = self._opentestcase(report)
+            reporter.append_skipped(report)
+        self.update_testcase_duration(report)
+        if report.when == "teardown":
+            reporter = self._opentestcase(report)
+            reporter.write_captured_output(report)
+
+            for propname, propvalue in report.user_properties:
+                reporter.add_property(propname, propvalue)
+
+            self.finalize(report)
+            report_wid = getattr(report, "worker_id", None)
+            report_ii = getattr(report, "item_index", None)
+            close_report = next(
+                (
+                    rep
+                    for rep in self.open_reports
+                    if (
+                        rep.nodeid == report.nodeid
+                        and getattr(rep, "item_index", None) == report_ii
+                        and getattr(rep, "worker_id", None) == report_wid
+                    )
+                ),
+                None,
+            )
+            if close_report:
+                self.open_reports.remove(close_report)
+
+    def update_testcase_duration(self, report):
+        """accumulates total duration for nodeid from given report and updates
+        the Junit.testcase with the new total if already created.
+        """
+        if self.report_duration == "total" or report.when == self.report_duration:
+            reporter = self.node_reporter(report)
+            reporter.duration += getattr(report, "duration", 0.0)
+
+    def pytest_collectreport(self, report):
+        if not report.passed:
+            reporter = self._opentestcase(report)
+            if report.failed:
+                reporter.append_collect_error(report)
+            else:
+                reporter.append_collect_skipped(report)
+
+    def pytest_internalerror(self, excrepr):
+        reporter = self.node_reporter("internal")
+        reporter.attrs.update(classname="pytest", name="internal")
+        reporter._add_simple(Junit.error, "internal error", excrepr)
+
+    def pytest_sessionstart(self):
+        self.suite_start_time = time.time()
+
+    def pytest_sessionfinish(self):
+        dirname = os.path.dirname(os.path.abspath(self.logfile))
+        if not os.path.isdir(dirname):
+            os.makedirs(dirname)
+        logfile = open(self.logfile, "w", encoding="utf-8")
+        suite_stop_time = time.time()
+        suite_time_delta = suite_stop_time - self.suite_start_time
+
+        numtests = (
+            self.stats["passed"]
+            + self.stats["failure"]
+            + self.stats["skipped"]
+            + self.stats["error"]
+            - self.cnt_double_fail_tests
+        )
+        logfile.write('<?xml version="1.0" encoding="utf-8"?>')
+
+        suite_node = Junit.testsuite(
+            self._get_global_properties_node(),
+            [x.to_xml() for x in self.node_reporters_ordered],
+            name=self.suite_name,
+            errors=self.stats["error"],
+            failures=self.stats["failure"],
+            skipped=self.stats["skipped"],
+            tests=numtests,
+            time="%.3f" % suite_time_delta,
+            timestamp=datetime.fromtimestamp(self.suite_start_time).isoformat(),
+            hostname=platform.node(),
+        )
+        logfile.write(Junit.testsuites([suite_node]).unicode(indent=0))
+        logfile.close()
+
+    def pytest_terminal_summary(self, terminalreporter):
+        terminalreporter.write_sep("-", "generated xml file: %s" % (self.logfile))
+
+    def add_global_property(self, name, value):
+        __tracebackhide__ = True
+        _check_record_param_type("name", name)
+        self.global_properties.append((name, bin_xml_escape(value)))
+
+    def _get_global_properties_node(self):
+        """Return a Junit node containing custom properties, if any.
+        """
+        if self.global_properties:
+            return Junit.properties(
+                [
+                    Junit.property(name=name, value=value)
+                    for name, value in self.global_properties
+                ]
+            )
+        return ""
diff --git a/contrib/python/pytest/py2/_pytest/logging.py b/contrib/python/pytest/py2/_pytest/logging.py
new file mode 100644
index 0000000000..2400737ee4
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/logging.py
@@ -0,0 +1,708 @@
+# -*- coding: utf-8 -*-
+""" Access and control log capturing. """
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import logging
+import re
+from contextlib import contextmanager
+
+import py
+import six
+
+import pytest
+from _pytest.compat import dummy_context_manager
+from _pytest.config import create_terminal_writer
+from _pytest.pathlib import Path
+
+DEFAULT_LOG_FORMAT = "%(levelname)-8s %(name)s:%(filename)s:%(lineno)d %(message)s"
+DEFAULT_LOG_DATE_FORMAT = "%H:%M:%S"
+_ANSI_ESCAPE_SEQ = re.compile(r"\x1b\[[\d;]+m")
+
+
+def _remove_ansi_escape_sequences(text):
+    return _ANSI_ESCAPE_SEQ.sub("", text)
+
+
+class ColoredLevelFormatter(logging.Formatter):
+    """
+    Colorize the %(levelname)..s part of the log format passed to __init__.
+    """
+
+    LOGLEVEL_COLOROPTS = {
+        logging.CRITICAL: {"red"},
+        logging.ERROR: {"red", "bold"},
+        logging.WARNING: {"yellow"},
+        logging.WARN: {"yellow"},
+        logging.INFO: {"green"},
+        logging.DEBUG: {"purple"},
+        logging.NOTSET: set(),
+    }
+    LEVELNAME_FMT_REGEX = re.compile(r"%\(levelname\)([+-]?\d*s)")
+
+    def __init__(self, terminalwriter, *args, **kwargs):
+        super(ColoredLevelFormatter, self).__init__(*args, **kwargs)
+        if six.PY2:
+            self._original_fmt = self._fmt
+        else:
+            self._original_fmt = self._style._fmt
+        self._level_to_fmt_mapping = {}
+
+        levelname_fmt_match = self.LEVELNAME_FMT_REGEX.search(self._fmt)
+        if not levelname_fmt_match:
+            return
+        levelname_fmt = levelname_fmt_match.group()
+
+        for level, color_opts in self.LOGLEVEL_COLOROPTS.items():
+            formatted_levelname = levelname_fmt % {
+                "levelname": logging.getLevelName(level)
+            }
+
+            # add ANSI escape sequences around the formatted levelname
+            color_kwargs = {name: True for name in color_opts}
+            colorized_formatted_levelname = terminalwriter.markup(
+                formatted_levelname, **color_kwargs
+            )
+            self._level_to_fmt_mapping[level] = self.LEVELNAME_FMT_REGEX.sub(
+                colorized_formatted_levelname, self._fmt
+            )
+
+    def format(self, record):
+        fmt = self._level_to_fmt_mapping.get(record.levelno, self._original_fmt)
+        if six.PY2:
+            self._fmt = fmt
+        else:
+            self._style._fmt = fmt
+        return super(ColoredLevelFormatter, self).format(record)
+
+
+if not six.PY2:
+    # Formatter classes don't support format styles in PY2
+
+    class PercentStyleMultiline(logging.PercentStyle):
+        """A logging style with special support for multiline messages.
+
+        If the message of a record consists of multiple lines, this style
+        formats the message as if each line were logged separately.
+        """
+
+        @staticmethod
+        def _update_message(record_dict, message):
+            tmp = record_dict.copy()
+            tmp["message"] = message
+            return tmp
+
+        def format(self, record):
+            if "\n" in record.message:
+                lines = record.message.splitlines()
+                formatted = self._fmt % self._update_message(record.__dict__, lines[0])
+                # TODO optimize this by introducing an option that tells the
+                # logging framework that the indentation doesn't
+                # change. This allows to compute the indentation only once.
+                indentation = _remove_ansi_escape_sequences(formatted).find(lines[0])
+                lines[0] = formatted
+                return ("\n" + " " * indentation).join(lines)
+            else:
+                return self._fmt % record.__dict__
+
+
+def get_option_ini(config, *names):
+    for name in names:
+        ret = config.getoption(name)  # 'default' arg won't work as expected
+        if ret is None:
+            ret = config.getini(name)
+        if ret:
+            return ret
+
+
+def pytest_addoption(parser):
+    """Add options to control log capturing."""
+    group = parser.getgroup("logging")
+
+    def add_option_ini(option, dest, default=None, type=None, **kwargs):
+        parser.addini(
+            dest, default=default, type=type, help="default value for " + option
+        )
+        group.addoption(option, dest=dest, **kwargs)
+
+    add_option_ini(
+        "--no-print-logs",
+        dest="log_print",
+        action="store_const",
+        const=False,
+        default=True,
+        type="bool",
+        help="disable printing caught logs on failed tests.",
+    )
+    add_option_ini(
+        "--log-level",
+        dest="log_level",
+        default=None,
+        help="logging level used by the logging module",
+    )
+    add_option_ini(
+        "--log-format",
+        dest="log_format",
+        default=DEFAULT_LOG_FORMAT,
+        help="log format as used by the logging module.",
+    )
+    add_option_ini(
+        "--log-date-format",
+        dest="log_date_format",
+        default=DEFAULT_LOG_DATE_FORMAT,
+        help="log date format as used by the logging module.",
+    )
+    parser.addini(
+        "log_cli",
+        default=False,
+        type="bool",
+        help='enable log display during test run (also known as "live logging").',
+    )
+    add_option_ini(
+        "--log-cli-level", dest="log_cli_level", default=None, help="cli logging level."
+    )
+    add_option_ini(
+        "--log-cli-format",
+        dest="log_cli_format",
+        default=None,
+        help="log format as used by the logging module.",
+    )
+    add_option_ini(
+        "--log-cli-date-format",
+        dest="log_cli_date_format",
+        default=None,
+        help="log date format as used by the logging module.",
+    )
+    add_option_ini(
+        "--log-file",
+        dest="log_file",
+        default=None,
+        help="path to a file when logging will be written to.",
+    )
+    add_option_ini(
+        "--log-file-level",
+        dest="log_file_level",
+        default=None,
+        help="log file logging level.",
+    )
+    add_option_ini(
+        "--log-file-format",
+        dest="log_file_format",
+        default=DEFAULT_LOG_FORMAT,
+        help="log format as used by the logging module.",
+    )
+    add_option_ini(
+        "--log-file-date-format",
+        dest="log_file_date_format",
+        default=DEFAULT_LOG_DATE_FORMAT,
+        help="log date format as used by the logging module.",
+    )
+
+
+@contextmanager
+def catching_logs(handler, formatter=None, level=None):
+    """Context manager that prepares the whole logging machinery properly."""
+    root_logger = logging.getLogger()
+
+    if formatter is not None:
+        handler.setFormatter(formatter)
+    if level is not None:
+        handler.setLevel(level)
+
+    # Adding the same handler twice would confuse logging system.
+    # Just don't do that.
+    add_new_handler = handler not in root_logger.handlers
+
+    if add_new_handler:
+        root_logger.addHandler(handler)
+    if level is not None:
+        orig_level = root_logger.level
+        root_logger.setLevel(min(orig_level, level))
+    try:
+        yield handler
+    finally:
+        if level is not None:
+            root_logger.setLevel(orig_level)
+        if add_new_handler:
+            root_logger.removeHandler(handler)
+
+
+class LogCaptureHandler(logging.StreamHandler):
+    """A logging handler that stores log records and the log text."""
+
+    def __init__(self):
+        """Creates a new log handler."""
+        logging.StreamHandler.__init__(self, py.io.TextIO())
+        self.records = []
+
+    def emit(self, record):
+        """Keep the log records in a list in addition to the log text."""
+        self.records.append(record)
+        logging.StreamHandler.emit(self, record)
+
+    def reset(self):
+        self.records = []
+        self.stream = py.io.TextIO()
+
+
+class LogCaptureFixture(object):
+    """Provides access and control of log capturing."""
+
+    def __init__(self, item):
+        """Creates a new funcarg."""
+        self._item = item
+        # dict of log name -> log level
+        self._initial_log_levels = {}  # Dict[str, int]
+
+    def _finalize(self):
+        """Finalizes the fixture.
+
+        This restores the log levels changed by :meth:`set_level`.
+        """
+        # restore log levels
+        for logger_name, level in self._initial_log_levels.items():
+            logger = logging.getLogger(logger_name)
+            logger.setLevel(level)
+
+    @property
+    def handler(self):
+        """
+        :rtype: LogCaptureHandler
+        """
+        return self._item.catch_log_handler
+
+    def get_records(self, when):
+        """
+        Get the logging records for one of the possible test phases.
+
+        :param str when:
+            Which test phase to obtain the records from. Valid values are: "setup", "call" and "teardown".
+
+        :rtype: List[logging.LogRecord]
+        :return: the list of captured records at the given stage
+
+        .. versionadded:: 3.4
+        """
+        handler = self._item.catch_log_handlers.get(when)
+        if handler:
+            return handler.records
+        else:
+            return []
+
+    @property
+    def text(self):
+        """Returns the formatted log text."""
+        return _remove_ansi_escape_sequences(self.handler.stream.getvalue())
+
+    @property
+    def records(self):
+        """Returns the list of log records."""
+        return self.handler.records
+
+    @property
+    def record_tuples(self):
+        """Returns a list of a stripped down version of log records intended
+        for use in assertion comparison.
+
+        The format of the tuple is:
+
+            (logger_name, log_level, message)
+        """
+        return [(r.name, r.levelno, r.getMessage()) for r in self.records]
+
+    @property
+    def messages(self):
+        """Returns a list of format-interpolated log messages.
+
+        Unlike 'records', which contains the format string and parameters for interpolation, log messages in this list
+        are all interpolated.
+        Unlike 'text', which contains the output from the handler, log messages in this list are unadorned with
+        levels, timestamps, etc, making exact comparisons more reliable.
+
+        Note that traceback or stack info (from :func:`logging.exception` or the `exc_info` or `stack_info` arguments
+        to the logging functions) is not included, as this is added by the formatter in the handler.
+
+        .. versionadded:: 3.7
+        """
+        return [r.getMessage() for r in self.records]
+
+    def clear(self):
+        """Reset the list of log records and the captured log text."""
+        self.handler.reset()
+
+    def set_level(self, level, logger=None):
+        """Sets the level for capturing of logs. The level will be restored to its previous value at the end of
+        the test.
+
+        :param int level: the logger to level.
+        :param str logger: the logger to update the level. If not given, the root logger level is updated.
+
+        .. versionchanged:: 3.4
+            The levels of the loggers changed by this function will be restored to their initial values at the
+            end of the test.
+        """
+        logger_name = logger
+        logger = logging.getLogger(logger_name)
+        # save the original log-level to restore it during teardown
+        self._initial_log_levels.setdefault(logger_name, logger.level)
+        logger.setLevel(level)
+
+    @contextmanager
+    def at_level(self, level, logger=None):
+        """Context manager that sets the level for capturing of logs. After the end of the 'with' statement the
+        level is restored to its original value.
+
+        :param int level: the logger to level.
+        :param str logger: the logger to update the level. If not given, the root logger level is updated.
+        """
+        logger = logging.getLogger(logger)
+        orig_level = logger.level
+        logger.setLevel(level)
+        try:
+            yield
+        finally:
+            logger.setLevel(orig_level)
+
+
+@pytest.fixture
+def caplog(request):
+    """Access and control log capturing.
+
+    Captured logs are available through the following properties/methods::
+
+    * caplog.text            -> string containing formatted log output
+    * caplog.records         -> list of logging.LogRecord instances
+    * caplog.record_tuples   -> list of (logger_name, level, message) tuples
+    * caplog.clear()         -> clear captured records and formatted log output string
+    """
+    result = LogCaptureFixture(request.node)
+    yield result
+    result._finalize()
+
+
+def get_actual_log_level(config, *setting_names):
+    """Return the actual logging level."""
+
+    for setting_name in setting_names:
+        log_level = config.getoption(setting_name)
+        if log_level is None:
+            log_level = config.getini(setting_name)
+        if log_level:
+            break
+    else:
+        return
+
+    if isinstance(log_level, six.string_types):
+        log_level = log_level.upper()
+    try:
+        return int(getattr(logging, log_level, log_level))
+    except ValueError:
+        # Python logging does not recognise this as a logging level
+        raise pytest.UsageError(
+            "'{}' is not recognized as a logging level name for "
+            "'{}'. Please consider passing the "
+            "logging level num instead.".format(log_level, setting_name)
+        )
+
+
+# run after terminalreporter/capturemanager are configured
+@pytest.hookimpl(trylast=True)
+def pytest_configure(config):
+    config.pluginmanager.register(LoggingPlugin(config), "logging-plugin")
+
+
+class LoggingPlugin(object):
+    """Attaches to the logging module and captures log messages for each test.
+    """
+
+    def __init__(self, config):
+        """Creates a new plugin to capture log messages.
+
+        The formatter can be safely shared across all handlers so
+        create a single one for the entire test session here.
+        """
+        self._config = config
+
+        self.print_logs = get_option_ini(config, "log_print")
+        self.formatter = self._create_formatter(
+            get_option_ini(config, "log_format"),
+            get_option_ini(config, "log_date_format"),
+        )
+        self.log_level = get_actual_log_level(config, "log_level")
+
+        self.log_file_level = get_actual_log_level(config, "log_file_level")
+        self.log_file_format = get_option_ini(config, "log_file_format", "log_format")
+        self.log_file_date_format = get_option_ini(
+            config, "log_file_date_format", "log_date_format"
+        )
+        self.log_file_formatter = logging.Formatter(
+            self.log_file_format, datefmt=self.log_file_date_format
+        )
+
+        log_file = get_option_ini(config, "log_file")
+        if log_file:
+            self.log_file_handler = logging.FileHandler(
+                log_file, mode="w", encoding="UTF-8"
+            )
+            self.log_file_handler.setFormatter(self.log_file_formatter)
+        else:
+            self.log_file_handler = None
+
+        self.log_cli_handler = None
+
+        self.live_logs_context = lambda: dummy_context_manager()
+        # Note that the lambda for the live_logs_context is needed because
+        # live_logs_context can otherwise not be entered multiple times due
+        # to limitations of contextlib.contextmanager.
+
+        if self._log_cli_enabled():
+            self._setup_cli_logging()
+
+    def _create_formatter(self, log_format, log_date_format):
+        # color option doesn't exist if terminal plugin is disabled
+        color = getattr(self._config.option, "color", "no")
+        if color != "no" and ColoredLevelFormatter.LEVELNAME_FMT_REGEX.search(
+            log_format
+        ):
+            formatter = ColoredLevelFormatter(
+                create_terminal_writer(self._config), log_format, log_date_format
+            )
+        else:
+            formatter = logging.Formatter(log_format, log_date_format)
+
+        if not six.PY2:
+            formatter._style = PercentStyleMultiline(formatter._style._fmt)
+        return formatter
+
+    def _setup_cli_logging(self):
+        config = self._config
+        terminal_reporter = config.pluginmanager.get_plugin("terminalreporter")
+        if terminal_reporter is None:
+            # terminal reporter is disabled e.g. by pytest-xdist.
+            return
+
+        capture_manager = config.pluginmanager.get_plugin("capturemanager")
+        # if capturemanager plugin is disabled, live logging still works.
+        log_cli_handler = _LiveLoggingStreamHandler(terminal_reporter, capture_manager)
+
+        log_cli_formatter = self._create_formatter(
+            get_option_ini(config, "log_cli_format", "log_format"),
+            get_option_ini(config, "log_cli_date_format", "log_date_format"),
+        )
+
+        log_cli_level = get_actual_log_level(config, "log_cli_level", "log_level")
+        self.log_cli_handler = log_cli_handler
+        self.live_logs_context = lambda: catching_logs(
+            log_cli_handler, formatter=log_cli_formatter, level=log_cli_level
+        )
+
+    def set_log_path(self, fname):
+        """Public method, which can set filename parameter for
+        Logging.FileHandler(). Also creates parent directory if
+        it does not exist.
+
+        .. warning::
+            Please considered as an experimental API.
+        """
+        fname = Path(fname)
+
+        if not fname.is_absolute():
+            fname = Path(self._config.rootdir, fname)
+
+        if not fname.parent.exists():
+            fname.parent.mkdir(exist_ok=True, parents=True)
+
+        self.log_file_handler = logging.FileHandler(
+            str(fname), mode="w", encoding="UTF-8"
+        )
+        self.log_file_handler.setFormatter(self.log_file_formatter)
+
+    def _log_cli_enabled(self):
+        """Return True if log_cli should be considered enabled, either explicitly
+        or because --log-cli-level was given in the command-line.
+        """
+        return self._config.getoption(
+            "--log-cli-level"
+        ) is not None or self._config.getini("log_cli")
+
+    @pytest.hookimpl(hookwrapper=True, tryfirst=True)
+    def pytest_collection(self):
+        with self.live_logs_context():
+            if self.log_cli_handler:
+                self.log_cli_handler.set_when("collection")
+
+            if self.log_file_handler is not None:
+                with catching_logs(self.log_file_handler, level=self.log_file_level):
+                    yield
+            else:
+                yield
+
+    @contextmanager
+    def _runtest_for(self, item, when):
+        with self._runtest_for_main(item, when):
+            if self.log_file_handler is not None:
+                with catching_logs(self.log_file_handler, level=self.log_file_level):
+                    yield
+            else:
+                yield
+
+    @contextmanager
+    def _runtest_for_main(self, item, when):
+        """Implements the internals of pytest_runtest_xxx() hook."""
+        with catching_logs(
+            LogCaptureHandler(), formatter=self.formatter, level=self.log_level
+        ) as log_handler:
+            if self.log_cli_handler:
+                self.log_cli_handler.set_when(when)
+
+            if item is None:
+                yield  # run the test
+                return
+
+            if not hasattr(item, "catch_log_handlers"):
+                item.catch_log_handlers = {}
+            item.catch_log_handlers[when] = log_handler
+            item.catch_log_handler = log_handler
+            try:
+                yield  # run test
+            finally:
+                if when == "teardown":
+                    del item.catch_log_handler
+                    del item.catch_log_handlers
+
+            if self.print_logs:
+                # Add a captured log section to the report.
+                log = log_handler.stream.getvalue().strip()
+                item.add_report_section(when, "log", log)
+
+    @pytest.hookimpl(hookwrapper=True)
+    def pytest_runtest_setup(self, item):
+        with self._runtest_for(item, "setup"):
+            yield
+
+    @pytest.hookimpl(hookwrapper=True)
+    def pytest_runtest_call(self, item):
+        with self._runtest_for(item, "call"):
+            yield
+
+    @pytest.hookimpl(hookwrapper=True)
+    def pytest_runtest_teardown(self, item):
+        with self._runtest_for(item, "teardown"):
+            yield
+
+    @pytest.hookimpl(hookwrapper=True)
+    def pytest_runtest_logstart(self):
+        if self.log_cli_handler:
+            self.log_cli_handler.reset()
+        with self._runtest_for(None, "start"):
+            yield
+
+    @pytest.hookimpl(hookwrapper=True)
+    def pytest_runtest_logfinish(self):
+        with self._runtest_for(None, "finish"):
+            yield
+
+    @pytest.hookimpl(hookwrapper=True)
+    def pytest_runtest_logreport(self):
+        with self._runtest_for(None, "logreport"):
+            yield
+
+    @pytest.hookimpl(hookwrapper=True, tryfirst=True)
+    def pytest_sessionfinish(self):
+        with self.live_logs_context():
+            if self.log_cli_handler:
+                self.log_cli_handler.set_when("sessionfinish")
+            if self.log_file_handler is not None:
+                try:
+                    with catching_logs(
+                        self.log_file_handler, level=self.log_file_level
+                    ):
+                        yield
+                finally:
+                    # Close the FileHandler explicitly.
+                    # (logging.shutdown might have lost the weakref?!)
+                    self.log_file_handler.close()
+            else:
+                yield
+
+    @pytest.hookimpl(hookwrapper=True, tryfirst=True)
+    def pytest_sessionstart(self):
+        with self.live_logs_context():
+            if self.log_cli_handler:
+                self.log_cli_handler.set_when("sessionstart")
+            if self.log_file_handler is not None:
+                with catching_logs(self.log_file_handler, level=self.log_file_level):
+                    yield
+            else:
+                yield
+
+    @pytest.hookimpl(hookwrapper=True)
+    def pytest_runtestloop(self, session):
+        """Runs all collected test items."""
+
+        if session.config.option.collectonly:
+            yield
+            return
+
+        if self._log_cli_enabled() and self._config.getoption("verbose") < 1:
+            # setting verbose flag is needed to avoid messy test progress output
+            self._config.option.verbose = 1
+
+        with self.live_logs_context():
+            if self.log_file_handler is not None:
+                with catching_logs(self.log_file_handler, level=self.log_file_level):
+                    yield  # run all the tests
+            else:
+                yield  # run all the tests
+
+
+class _LiveLoggingStreamHandler(logging.StreamHandler):
+    """
+    Custom StreamHandler used by the live logging feature: it will write a newline before the first log message
+    in each test.
+
+    During live logging we must also explicitly disable stdout/stderr capturing otherwise it will get captured
+    and won't appear in the terminal.
+    """
+
+    def __init__(self, terminal_reporter, capture_manager):
+        """
+        :param _pytest.terminal.TerminalReporter terminal_reporter:
+        :param _pytest.capture.CaptureManager capture_manager:
+        """
+        logging.StreamHandler.__init__(self, stream=terminal_reporter)
+        self.capture_manager = capture_manager
+        self.reset()
+        self.set_when(None)
+        self._test_outcome_written = False
+
+    def reset(self):
+        """Reset the handler; should be called before the start of each test"""
+        self._first_record_emitted = False
+
+    def set_when(self, when):
+        """Prepares for the given test phase (setup/call/teardown)"""
+        self._when = when
+        self._section_name_shown = False
+        if when == "start":
+            self._test_outcome_written = False
+
+    def emit(self, record):
+        ctx_manager = (
+            self.capture_manager.global_and_fixture_disabled()
+            if self.capture_manager
+            else dummy_context_manager()
+        )
+        with ctx_manager:
+            if not self._first_record_emitted:
+                self.stream.write("\n")
+                self._first_record_emitted = True
+            elif self._when in ("teardown", "finish"):
+                if not self._test_outcome_written:
+                    self._test_outcome_written = True
+                    self.stream.write("\n")
+            if not self._section_name_shown and self._when:
+                self.stream.section("live log " + self._when, sep="-", bold=True)
+                self._section_name_shown = True
+            logging.StreamHandler.emit(self, record)
diff --git a/contrib/python/pytest/py2/_pytest/main.py b/contrib/python/pytest/py2/_pytest/main.py
new file mode 100644
index 0000000000..a9d310cb62
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/main.py
@@ -0,0 +1,780 @@
+# -*- coding: utf-8 -*-
+""" core implementation of testing process: init, session, runtest loop. """
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import contextlib
+import fnmatch
+import functools
+import os
+import pkgutil
+import sys
+import warnings
+
+import attr
+import py
+import six
+
+import _pytest._code
+from _pytest import nodes
+from _pytest.config import directory_arg
+from _pytest.config import hookimpl
+from _pytest.config import UsageError
+from _pytest.deprecated import PYTEST_CONFIG_GLOBAL
+from _pytest.outcomes import exit
+from _pytest.runner import collect_one_node
+
+# exitcodes for the command line
+EXIT_OK = 0
+EXIT_TESTSFAILED = 1
+EXIT_INTERRUPTED = 2
+EXIT_INTERNALERROR = 3
+EXIT_USAGEERROR = 4
+EXIT_NOTESTSCOLLECTED = 5
+
+
+def pytest_addoption(parser):
+    parser.addini(
+        "norecursedirs",
+        "directory patterns to avoid for recursion",
+        type="args",
+        default=[".*", "build", "dist", "CVS", "_darcs", "{arch}", "*.egg", "venv"],
+    )
+    parser.addini(
+        "testpaths",
+        "directories to search for tests when no files or directories are given in the "
+        "command line.",
+        type="args",
+        default=[],
+    )
+    group = parser.getgroup("general", "running and selection options")
+    group._addoption(
+        "-x",
+        "--exitfirst",
+        action="store_const",
+        dest="maxfail",
+        const=1,
+        help="exit instantly on first error or failed test.",
+    ),
+    group._addoption(
+        "--maxfail",
+        metavar="num",
+        action="store",
+        type=int,
+        dest="maxfail",
+        default=0,
+        help="exit after first num failures or errors.",
+    )
+    group._addoption(
+        "--strict-markers",
+        "--strict",
+        action="store_true",
+        help="markers not registered in the `markers` section of the configuration file raise errors.",
+    )
+    group._addoption(
+        "-c",
+        metavar="file",
+        type=str,
+        dest="inifilename",
+        help="load configuration from `file` instead of trying to locate one of the implicit "
+        "configuration files.",
+    )
+    group._addoption(
+        "--continue-on-collection-errors",
+        action="store_true",
+        default=False,
+        dest="continue_on_collection_errors",
+        help="Force test execution even if collection errors occur.",
+    )
+    group._addoption(
+        "--rootdir",
+        action="store",
+        dest="rootdir",
+        help="Define root directory for tests. Can be relative path: 'root_dir', './root_dir', "
+        "'root_dir/another_dir/'; absolute path: '/home/user/root_dir'; path with variables: "
+        "'$HOME/root_dir'.",
+    )
+
+    group = parser.getgroup("collect", "collection")
+    group.addoption(
+        "--collectonly",
+        "--collect-only",
+        action="store_true",
+        help="only collect tests, don't execute them.",
+    ),
+    group.addoption(
+        "--pyargs",
+        action="store_true",
+        help="try to interpret all arguments as python packages.",
+    )
+    group.addoption(
+        "--ignore",
+        action="append",
+        metavar="path",
+        help="ignore path during collection (multi-allowed).",
+    )
+    group.addoption(
+        "--ignore-glob",
+        action="append",
+        metavar="path",
+        help="ignore path pattern during collection (multi-allowed).",
+    )
+    group.addoption(
+        "--deselect",
+        action="append",
+        metavar="nodeid_prefix",
+        help="deselect item during collection (multi-allowed).",
+    )
+    # when changing this to --conf-cut-dir, config.py Conftest.setinitial
+    # needs upgrading as well
+    group.addoption(
+        "--confcutdir",
+        dest="confcutdir",
+        default=None,
+        metavar="dir",
+        type=functools.partial(directory_arg, optname="--confcutdir"),
+        help="only load conftest.py's relative to specified dir.",
+    )
+    group.addoption(
+        "--noconftest",
+        action="store_true",
+        dest="noconftest",
+        default=False,
+        help="Don't load any conftest.py files.",
+    )
+    group.addoption(
+        "--keepduplicates",
+        "--keep-duplicates",
+        action="store_true",
+        dest="keepduplicates",
+        default=False,
+        help="Keep duplicate tests.",
+    )
+    group.addoption(
+        "--collect-in-virtualenv",
+        action="store_true",
+        dest="collect_in_virtualenv",
+        default=False,
+        help="Don't ignore tests in a local virtualenv directory",
+    )
+
+    group = parser.getgroup("debugconfig", "test session debugging and configuration")
+    group.addoption(
+        "--basetemp",
+        dest="basetemp",
+        default=None,
+        metavar="dir",
+        help=(
+            "base temporary directory for this test run."
+            "(warning: this directory is removed if it exists)"
+        ),
+    )
+
+
+class _ConfigDeprecated(object):
+    def __init__(self, config):
+        self.__dict__["_config"] = config
+
+    def __getattr__(self, attr):
+        warnings.warn(PYTEST_CONFIG_GLOBAL, stacklevel=2)
+        return getattr(self._config, attr)
+
+    def __setattr__(self, attr, val):
+        warnings.warn(PYTEST_CONFIG_GLOBAL, stacklevel=2)
+        return setattr(self._config, attr, val)
+
+    def __repr__(self):
+        return "{}({!r})".format(type(self).__name__, self._config)
+
+
+def pytest_configure(config):
+    __import__("pytest").config = _ConfigDeprecated(config)  # compatibility
+
+
+def wrap_session(config, doit):
+    """Skeleton command line program"""
+    session = Session(config)
+    session.exitstatus = EXIT_OK
+    initstate = 0
+    try:
+        try:
+            config._do_configure()
+            initstate = 1
+            config.hook.pytest_sessionstart(session=session)
+            initstate = 2
+            session.exitstatus = doit(config, session) or 0
+        except UsageError:
+            session.exitstatus = EXIT_USAGEERROR
+            raise
+        except Failed:
+            session.exitstatus = EXIT_TESTSFAILED
+        except (KeyboardInterrupt, exit.Exception):
+            excinfo = _pytest._code.ExceptionInfo.from_current()
+            exitstatus = EXIT_INTERRUPTED
+            if isinstance(excinfo.value, exit.Exception):
+                if excinfo.value.returncode is not None:
+                    exitstatus = excinfo.value.returncode
+                if initstate < 2:
+                    sys.stderr.write(
+                        "{}: {}\n".format(excinfo.typename, excinfo.value.msg)
+                    )
+            config.hook.pytest_keyboard_interrupt(excinfo=excinfo)
+            session.exitstatus = exitstatus
+        except:  # noqa
+            excinfo = _pytest._code.ExceptionInfo.from_current()
+            config.notify_exception(excinfo, config.option)
+            session.exitstatus = EXIT_INTERNALERROR
+            if excinfo.errisinstance(SystemExit):
+                sys.stderr.write("mainloop: caught unexpected SystemExit!\n")
+
+    finally:
+        excinfo = None  # Explicitly break reference cycle.
+        session.startdir.chdir()
+        if initstate >= 2:
+            config.hook.pytest_sessionfinish(
+                session=session, exitstatus=session.exitstatus
+            )
+        config._ensure_unconfigure()
+    return session.exitstatus
+
+
+def pytest_cmdline_main(config):
+    return wrap_session(config, _main)
+
+
+def _main(config, session):
+    """ default command line protocol for initialization, session,
+    running tests and reporting. """
+    config.hook.pytest_collection(session=session)
+    config.hook.pytest_runtestloop(session=session)
+
+    if session.testsfailed:
+        return EXIT_TESTSFAILED
+    elif session.testscollected == 0:
+        return EXIT_NOTESTSCOLLECTED
+
+
+def pytest_collection(session):
+    return session.perform_collect()
+
+
+def pytest_runtestloop(session):
+    if session.testsfailed and not session.config.option.continue_on_collection_errors:
+        raise session.Interrupted("%d errors during collection" % session.testsfailed)
+
+    if session.config.option.collectonly:
+        return True
+
+    for i, item in enumerate(session.items):
+        nextitem = session.items[i + 1] if i + 1 < len(session.items) else None
+        item.config.hook.pytest_runtest_protocol(item=item, nextitem=nextitem)
+        if session.shouldfail:
+            raise session.Failed(session.shouldfail)
+        if session.shouldstop:
+            raise session.Interrupted(session.shouldstop)
+    return True
+
+
+def _in_venv(path):
+    """Attempts to detect if ``path`` is the root of a Virtual Environment by
+    checking for the existence of the appropriate activate script"""
+    bindir = path.join("Scripts" if sys.platform.startswith("win") else "bin")
+    if not bindir.isdir():
+        return False
+    activates = (
+        "activate",
+        "activate.csh",
+        "activate.fish",
+        "Activate",
+        "Activate.bat",
+        "Activate.ps1",
+    )
+    return any([fname.basename in activates for fname in bindir.listdir()])
+
+
+def pytest_ignore_collect(path, config):
+    ignore_paths = config._getconftest_pathlist("collect_ignore", path=path.dirpath())
+    ignore_paths = ignore_paths or []
+    excludeopt = config.getoption("ignore")
+    if excludeopt:
+        ignore_paths.extend([py.path.local(x) for x in excludeopt])
+
+    if py.path.local(path) in ignore_paths:
+        return True
+
+    ignore_globs = config._getconftest_pathlist(
+        "collect_ignore_glob", path=path.dirpath()
+    )
+    ignore_globs = ignore_globs or []
+    excludeglobopt = config.getoption("ignore_glob")
+    if excludeglobopt:
+        ignore_globs.extend([py.path.local(x) for x in excludeglobopt])
+
+    if any(
+        fnmatch.fnmatch(six.text_type(path), six.text_type(glob))
+        for glob in ignore_globs
+    ):
+        return True
+
+    allow_in_venv = config.getoption("collect_in_virtualenv")
+    if not allow_in_venv and _in_venv(path):
+        return True
+
+    return False
+
+
+def pytest_collection_modifyitems(items, config):
+    deselect_prefixes = tuple(config.getoption("deselect") or [])
+    if not deselect_prefixes:
+        return
+
+    remaining = []
+    deselected = []
+    for colitem in items:
+        if colitem.nodeid.startswith(deselect_prefixes):
+            deselected.append(colitem)
+        else:
+            remaining.append(colitem)
+
+    if deselected:
+        config.hook.pytest_deselected(items=deselected)
+        items[:] = remaining
+
+
+@contextlib.contextmanager
+def _patched_find_module():
+    """Patch bug in pkgutil.ImpImporter.find_module
+
+    When using pkgutil.find_loader on python<3.4 it removes symlinks
+    from the path due to a call to os.path.realpath. This is not consistent
+    with actually doing the import (in these versions, pkgutil and __import__
+    did not share the same underlying code). This can break conftest
+    discovery for pytest where symlinks are involved.
+
+    The only supported python<3.4 by pytest is python 2.7.
+    """
+    if six.PY2:  # python 3.4+ uses importlib instead
+
+        def find_module_patched(self, fullname, path=None):
+            # Note: we ignore 'path' argument since it is only used via meta_path
+            subname = fullname.split(".")[-1]
+            if subname != fullname and self.path is None:
+                return None
+            if self.path is None:
+                path = None
+            else:
+                # original: path = [os.path.realpath(self.path)]
+                path = [self.path]
+            try:
+                file, filename, etc = pkgutil.imp.find_module(subname, path)
+            except ImportError:
+                return None
+            return pkgutil.ImpLoader(fullname, file, filename, etc)
+
+        old_find_module = pkgutil.ImpImporter.find_module
+        pkgutil.ImpImporter.find_module = find_module_patched
+        try:
+            yield
+        finally:
+            pkgutil.ImpImporter.find_module = old_find_module
+    else:
+        yield
+
+
+class FSHookProxy(object):
+    def __init__(self, fspath, pm, remove_mods):
+        self.fspath = fspath
+        self.pm = pm
+        self.remove_mods = remove_mods
+
+    def __getattr__(self, name):
+        x = self.pm.subset_hook_caller(name, remove_plugins=self.remove_mods)
+        self.__dict__[name] = x
+        return x
+
+
+class NoMatch(Exception):
+    """ raised if matching cannot locate a matching names. """
+
+
+class Interrupted(KeyboardInterrupt):
+    """ signals an interrupted test run. """
+
+    __module__ = "builtins"  # for py3
+
+
+class Failed(Exception):
+    """ signals a stop as failed test run. """
+
+
+@attr.s
+class _bestrelpath_cache(dict):
+    path = attr.ib()
+
+    def __missing__(self, path):
+        r = self.path.bestrelpath(path)
+        self[path] = r
+        return r
+
+
+class Session(nodes.FSCollector):
+    Interrupted = Interrupted
+    Failed = Failed
+
+    def __init__(self, config):
+        nodes.FSCollector.__init__(
+            self, config.rootdir, parent=None, config=config, session=self, nodeid=""
+        )
+        self.testsfailed = 0
+        self.testscollected = 0
+        self.shouldstop = False
+        self.shouldfail = False
+        self.trace = config.trace.root.get("collection")
+        self._norecursepatterns = config.getini("norecursedirs")
+        self.startdir = config.invocation_dir
+        self._initialpaths = frozenset()
+        # Keep track of any collected nodes in here, so we don't duplicate fixtures
+        self._node_cache = {}
+        self._bestrelpathcache = _bestrelpath_cache(config.rootdir)
+        # Dirnames of pkgs with dunder-init files.
+        self._pkg_roots = {}
+
+        self.config.pluginmanager.register(self, name="session")
+
+    def __repr__(self):
+        return "<%s %s exitstatus=%r testsfailed=%d testscollected=%d>" % (
+            self.__class__.__name__,
+            self.name,
+            getattr(self, "exitstatus", "<UNSET>"),
+            self.testsfailed,
+            self.testscollected,
+        )
+
+    def _node_location_to_relpath(self, node_path):
+        # bestrelpath is a quite slow function
+        return self._bestrelpathcache[node_path]
+
+    @hookimpl(tryfirst=True)
+    def pytest_collectstart(self):
+        if self.shouldfail:
+            raise self.Failed(self.shouldfail)
+        if self.shouldstop:
+            raise self.Interrupted(self.shouldstop)
+
+    @hookimpl(tryfirst=True)
+    def pytest_runtest_logreport(self, report):
+        if report.failed and not hasattr(report, "wasxfail"):
+            self.testsfailed += 1
+            maxfail = self.config.getvalue("maxfail")
+            if maxfail and self.testsfailed >= maxfail:
+                self.shouldfail = "stopping after %d failures" % (self.testsfailed)
+
+    pytest_collectreport = pytest_runtest_logreport
+
+    def isinitpath(self, path):
+        return path in self._initialpaths
+
+    def gethookproxy(self, fspath):
+        # check if we have the common case of running
+        # hooks with all conftest.py files
+        pm = self.config.pluginmanager
+        my_conftestmodules = pm._getconftestmodules(fspath)
+        remove_mods = pm._conftest_plugins.difference(my_conftestmodules)
+        if remove_mods:
+            # one or more conftests are not in use at this fspath
+            proxy = FSHookProxy(fspath, pm, remove_mods)
+        else:
+            # all plugis are active for this fspath
+            proxy = self.config.hook
+        return proxy
+
+    def perform_collect(self, args=None, genitems=True):
+        hook = self.config.hook
+        try:
+            items = self._perform_collect(args, genitems)
+            self.config.pluginmanager.check_pending()
+            hook.pytest_collection_modifyitems(
+                session=self, config=self.config, items=items
+            )
+        finally:
+            hook.pytest_collection_finish(session=self)
+        self.testscollected = len(items)
+        return items
+
+    def _perform_collect(self, args, genitems):
+        if args is None:
+            args = self.config.args
+        self.trace("perform_collect", self, args)
+        self.trace.root.indent += 1
+        self._notfound = []
+        initialpaths = []
+        self._initialparts = []
+        self.items = items = []
+        for arg in args:
+            parts = self._parsearg(arg)
+            self._initialparts.append(parts)
+            initialpaths.append(parts[0])
+        self._initialpaths = frozenset(initialpaths)
+        rep = collect_one_node(self)
+        self.ihook.pytest_collectreport(report=rep)
+        self.trace.root.indent -= 1
+        if self._notfound:
+            errors = []
+            for arg, exc in self._notfound:
+                line = "(no name %r in any of %r)" % (arg, exc.args[0])
+                errors.append("not found: %s\n%s" % (arg, line))
+                # XXX: test this
+            raise UsageError(*errors)
+        if not genitems:
+            return rep.result
+        else:
+            if rep.passed:
+                for node in rep.result:
+                    self.items.extend(self.genitems(node))
+            return items
+
+    def collect(self):
+        for initialpart in self._initialparts:
+            arg = "::".join(map(str, initialpart))
+            self.trace("processing argument", arg)
+            self.trace.root.indent += 1
+            try:
+                for x in self._collect(arg):
+                    yield x
+            except NoMatch:
+                # we are inside a make_report hook so
+                # we cannot directly pass through the exception
+                self._notfound.append((arg, sys.exc_info()[1]))
+
+            self.trace.root.indent -= 1
+
+    def _collect(self, arg):
+        from _pytest.python import Package
+
+        names = self._parsearg(arg)
+        argpath = names.pop(0)
+
+        # Start with a Session root, and delve to argpath item (dir or file)
+        # and stack all Packages found on the way.
+        # No point in finding packages when collecting doctests
+        if not self.config.getoption("doctestmodules", False):
+            pm = self.config.pluginmanager
+            for parent in reversed(argpath.parts()):
+                if pm._confcutdir and pm._confcutdir.relto(parent):
+                    break
+
+                if parent.isdir():
+                    pkginit = parent.join("__init__.py")
+                    if pkginit.isfile():
+                        if pkginit not in self._node_cache:
+                            col = self._collectfile(pkginit, handle_dupes=False)
+                            if col:
+                                if isinstance(col[0], Package):
+                                    self._pkg_roots[parent] = col[0]
+                                # always store a list in the cache, matchnodes expects it
+                                self._node_cache[col[0].fspath] = [col[0]]
+
+        # If it's a directory argument, recurse and look for any Subpackages.
+        # Let the Package collector deal with subnodes, don't collect here.
+        if argpath.check(dir=1):
+            assert not names, "invalid arg %r" % (arg,)
+
+            seen_dirs = set()
+            for path in argpath.visit(
+                fil=self._visit_filter, rec=self._recurse, bf=True, sort=True
+            ):
+                dirpath = path.dirpath()
+                if dirpath not in seen_dirs:
+                    # Collect packages first.
+                    seen_dirs.add(dirpath)
+                    pkginit = dirpath.join("__init__.py")
+                    if pkginit.exists():
+                        for x in self._collectfile(pkginit):
+                            yield x
+                            if isinstance(x, Package):
+                                self._pkg_roots[dirpath] = x
+                if dirpath in self._pkg_roots:
+                    # Do not collect packages here.
+                    continue
+
+                for x in self._collectfile(path):
+                    key = (type(x), x.fspath)
+                    if key in self._node_cache:
+                        yield self._node_cache[key]
+                    else:
+                        self._node_cache[key] = x
+                        yield x
+        else:
+            assert argpath.check(file=1)
+
+            if argpath in self._node_cache:
+                col = self._node_cache[argpath]
+            else:
+                collect_root = self._pkg_roots.get(argpath.dirname, self)
+                col = collect_root._collectfile(argpath, handle_dupes=False)
+                if col:
+                    self._node_cache[argpath] = col
+            m = self.matchnodes(col, names)
+            # If __init__.py was the only file requested, then the matched node will be
+            # the corresponding Package, and the first yielded item will be the __init__
+            # Module itself, so just use that. If this special case isn't taken, then all
+            # the files in the package will be yielded.
+            if argpath.basename == "__init__.py":
+                try:
+                    yield next(m[0].collect())
+                except StopIteration:
+                    # The package collects nothing with only an __init__.py
+                    # file in it, which gets ignored by the default
+                    # "python_files" option.
+                    pass
+                return
+            for y in m:
+                yield y
+
+    def _collectfile(self, path, handle_dupes=True):
+        assert path.isfile(), "%r is not a file (isdir=%r, exists=%r, islink=%r)" % (
+            path,
+            path.isdir(),
+            path.exists(),
+            path.islink(),
+        )
+        ihook = self.gethookproxy(path)
+        if not self.isinitpath(path):
+            if ihook.pytest_ignore_collect(path=path, config=self.config):
+                return ()
+
+        if handle_dupes:
+            keepduplicates = self.config.getoption("keepduplicates")
+            if not keepduplicates:
+                duplicate_paths = self.config.pluginmanager._duplicatepaths
+                if path in duplicate_paths:
+                    return ()
+                else:
+                    duplicate_paths.add(path)
+
+        return ihook.pytest_collect_file(path=path, parent=self)
+
+    def _recurse(self, dirpath):
+        if dirpath.basename == "__pycache__":
+            return False
+        ihook = self.gethookproxy(dirpath.dirpath())
+        if ihook.pytest_ignore_collect(path=dirpath, config=self.config):
+            return False
+        for pat in self._norecursepatterns:
+            if dirpath.check(fnmatch=pat):
+                return False
+        ihook = self.gethookproxy(dirpath)
+        ihook.pytest_collect_directory(path=dirpath, parent=self)
+        return True
+
+    if six.PY2:
+
+        @staticmethod
+        def _visit_filter(f):
+            return f.check(file=1) and not f.strpath.endswith("*.pyc")
+
+    else:
+
+        @staticmethod
+        def _visit_filter(f):
+            return f.check(file=1)
+
+    def _tryconvertpyarg(self, x):
+        """Convert a dotted module name to path."""
+        try:
+            with _patched_find_module():
+                loader = pkgutil.find_loader(x)
+        except ImportError:
+            return x
+        if loader is None:
+            return x
+        # This method is sometimes invoked when AssertionRewritingHook, which
+        # does not define a get_filename method, is already in place:
+        try:
+            with _patched_find_module():
+                path = loader.get_filename(x)
+        except AttributeError:
+            # Retrieve path from AssertionRewritingHook:
+            path = loader.modules[x][0].co_filename
+        if loader.is_package(x):
+            path = os.path.dirname(path)
+        return path
+
+    def _parsearg(self, arg):
+        """ return (fspath, names) tuple after checking the file exists. """
+        parts = str(arg).split("::")
+        if self.config.option.pyargs:
+            parts[0] = self._tryconvertpyarg(parts[0])
+        relpath = parts[0].replace("/", os.sep)
+        path = self.config.invocation_dir.join(relpath, abs=True)
+        if not path.check():
+            if self.config.option.pyargs:
+                raise UsageError(
+                    "file or package not found: " + arg + " (missing __init__.py?)"
+                )
+            raise UsageError("file not found: " + arg)
+        parts[0] = path.realpath()
+        return parts
+
+    def matchnodes(self, matching, names):
+        self.trace("matchnodes", matching, names)
+        self.trace.root.indent += 1
+        nodes = self._matchnodes(matching, names)
+        num = len(nodes)
+        self.trace("matchnodes finished -> ", num, "nodes")
+        self.trace.root.indent -= 1
+        if num == 0:
+            raise NoMatch(matching, names[:1])
+        return nodes
+
+    def _matchnodes(self, matching, names):
+        if not matching or not names:
+            return matching
+        name = names[0]
+        assert name
+        nextnames = names[1:]
+        resultnodes = []
+        for node in matching:
+            if isinstance(node, nodes.Item):
+                if not names:
+                    resultnodes.append(node)
+                continue
+            assert isinstance(node, nodes.Collector)
+            key = (type(node), node.nodeid)
+            if key in self._node_cache:
+                rep = self._node_cache[key]
+            else:
+                rep = collect_one_node(node)
+                self._node_cache[key] = rep
+            if rep.passed:
+                has_matched = False
+                for x in rep.result:
+                    # TODO: remove parametrized workaround once collection structure contains parametrization
+                    if x.name == name or x.name.split("[")[0] == name:
+                        resultnodes.extend(self.matchnodes([x], nextnames))
+                        has_matched = True
+                # XXX accept IDs that don't have "()" for class instances
+                if not has_matched and len(rep.result) == 1 and x.name == "()":
+                    nextnames.insert(0, name)
+                    resultnodes.extend(self.matchnodes([x], nextnames))
+            else:
+                # report collection failures here to avoid failing to run some test
+                # specified in the command line because the module could not be
+                # imported (#134)
+                node.ihook.pytest_collectreport(report=rep)
+        return resultnodes
+
+    def genitems(self, node):
+        self.trace("genitems", node)
+        if isinstance(node, nodes.Item):
+            node.ihook.pytest_itemcollected(item=node)
+            yield node
+        else:
+            assert isinstance(node, nodes.Collector)
+            rep = collect_one_node(node)
+            if rep.passed:
+                for subnode in rep.result:
+                    for x in self.genitems(subnode):
+                        yield x
+            node.ihook.pytest_collectreport(report=rep)
diff --git a/contrib/python/pytest/py2/_pytest/mark/__init__.py b/contrib/python/pytest/py2/_pytest/mark/__init__.py
new file mode 100644
index 0000000000..6bc22fe27d
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/mark/__init__.py
@@ -0,0 +1,166 @@
+# -*- coding: utf-8 -*-
+""" generic mechanism for marking and selecting python functions. """
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+from .legacy import matchkeyword
+from .legacy import matchmark
+from .structures import EMPTY_PARAMETERSET_OPTION
+from .structures import get_empty_parameterset_mark
+from .structures import Mark
+from .structures import MARK_GEN
+from .structures import MarkDecorator
+from .structures import MarkGenerator
+from .structures import ParameterSet
+from _pytest.config import UsageError
+
+__all__ = ["Mark", "MarkDecorator", "MarkGenerator", "get_empty_parameterset_mark"]
+
+
+def param(*values, **kw):
+    """Specify a parameter in `pytest.mark.parametrize`_ calls or
+    :ref:`parametrized fixtures <fixture-parametrize-marks>`.
+
+    .. code-block:: python
+
+        @pytest.mark.parametrize("test_input,expected", [
+            ("3+5", 8),
+            pytest.param("6*9", 42, marks=pytest.mark.xfail),
+        ])
+        def test_eval(test_input, expected):
+            assert eval(test_input) == expected
+
+    :param values: variable args of the values of the parameter set, in order.
+    :keyword marks: a single mark or a list of marks to be applied to this parameter set.
+    :keyword str id: the id to attribute to this parameter set.
+    """
+    return ParameterSet.param(*values, **kw)
+
+
+def pytest_addoption(parser):
+    group = parser.getgroup("general")
+    group._addoption(
+        "-k",
+        action="store",
+        dest="keyword",
+        default="",
+        metavar="EXPRESSION",
+        help="only run tests which match the given substring expression. "
+        "An expression is a python evaluatable expression "
+        "where all names are substring-matched against test names "
+        "and their parent classes. Example: -k 'test_method or test_"
+        "other' matches all test functions and classes whose name "
+        "contains 'test_method' or 'test_other', while -k 'not test_method' "
+        "matches those that don't contain 'test_method' in their names. "
+        "-k 'not test_method and not test_other' will eliminate the matches. "
+        "Additionally keywords are matched to classes and functions "
+        "containing extra names in their 'extra_keyword_matches' set, "
+        "as well as functions which have names assigned directly to them.",
+    )
+
+    group._addoption(
+        "-m",
+        action="store",
+        dest="markexpr",
+        default="",
+        metavar="MARKEXPR",
+        help="only run tests matching given mark expression.  "
+        "example: -m 'mark1 and not mark2'.",
+    )
+
+    group.addoption(
+        "--markers",
+        action="store_true",
+        help="show markers (builtin, plugin and per-project ones).",
+    )
+
+    parser.addini("markers", "markers for test functions", "linelist")
+    parser.addini(EMPTY_PARAMETERSET_OPTION, "default marker for empty parametersets")
+
+
+def pytest_cmdline_main(config):
+    import _pytest.config
+
+    if config.option.markers:
+        config._do_configure()
+        tw = _pytest.config.create_terminal_writer(config)
+        for line in config.getini("markers"):
+            parts = line.split(":", 1)
+            name = parts[0]
+            rest = parts[1] if len(parts) == 2 else ""
+            tw.write("@pytest.mark.%s:" % name, bold=True)
+            tw.line(rest)
+            tw.line()
+        config._ensure_unconfigure()
+        return 0
+
+
+pytest_cmdline_main.tryfirst = True
+
+
+def deselect_by_keyword(items, config):
+    keywordexpr = config.option.keyword.lstrip()
+    if not keywordexpr:
+        return
+
+    if keywordexpr.startswith("-"):
+        keywordexpr = "not " + keywordexpr[1:]
+    selectuntil = False
+    if keywordexpr[-1:] == ":":
+        selectuntil = True
+        keywordexpr = keywordexpr[:-1]
+
+    remaining = []
+    deselected = []
+    for colitem in items:
+        if keywordexpr and not matchkeyword(colitem, keywordexpr):
+            deselected.append(colitem)
+        else:
+            if selectuntil:
+                keywordexpr = None
+            remaining.append(colitem)
+
+    if deselected:
+        config.hook.pytest_deselected(items=deselected)
+        items[:] = remaining
+
+
+def deselect_by_mark(items, config):
+    matchexpr = config.option.markexpr
+    if not matchexpr:
+        return
+
+    remaining = []
+    deselected = []
+    for item in items:
+        if matchmark(item, matchexpr):
+            remaining.append(item)
+        else:
+            deselected.append(item)
+
+    if deselected:
+        config.hook.pytest_deselected(items=deselected)
+        items[:] = remaining
+
+
+def pytest_collection_modifyitems(items, config):
+    deselect_by_keyword(items, config)
+    deselect_by_mark(items, config)
+
+
+def pytest_configure(config):
+    config._old_mark_config = MARK_GEN._config
+    MARK_GEN._config = config
+
+    empty_parameterset = config.getini(EMPTY_PARAMETERSET_OPTION)
+
+    if empty_parameterset not in ("skip", "xfail", "fail_at_collect", None, ""):
+        raise UsageError(
+            "{!s} must be one of skip, xfail or fail_at_collect"
+            " but it is {!r}".format(EMPTY_PARAMETERSET_OPTION, empty_parameterset)
+        )
+
+
+def pytest_unconfigure(config):
+    MARK_GEN._config = getattr(config, "_old_mark_config", None)
diff --git a/contrib/python/pytest/py2/_pytest/mark/evaluate.py b/contrib/python/pytest/py2/_pytest/mark/evaluate.py
new file mode 100644
index 0000000000..506546e253
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/mark/evaluate.py
@@ -0,0 +1,126 @@
+# -*- coding: utf-8 -*-
+import os
+import platform
+import sys
+import traceback
+
+import six
+
+from ..outcomes import fail
+from ..outcomes import TEST_OUTCOME
+
+
+def cached_eval(config, expr, d):
+    if not hasattr(config, "_evalcache"):
+        config._evalcache = {}
+    try:
+        return config._evalcache[expr]
+    except KeyError:
+        import _pytest._code
+
+        exprcode = _pytest._code.compile(expr, mode="eval")
+        config._evalcache[expr] = x = eval(exprcode, d)
+        return x
+
+
+class MarkEvaluator(object):
+    def __init__(self, item, name):
+        self.item = item
+        self._marks = None
+        self._mark = None
+        self._mark_name = name
+
+    def __bool__(self):
+        # dont cache here to prevent staleness
+        return bool(self._get_marks())
+
+    __nonzero__ = __bool__
+
+    def wasvalid(self):
+        return not hasattr(self, "exc")
+
+    def _get_marks(self):
+        return list(self.item.iter_markers(name=self._mark_name))
+
+    def invalidraise(self, exc):
+        raises = self.get("raises")
+        if not raises:
+            return
+        return not isinstance(exc, raises)
+
+    def istrue(self):
+        try:
+            return self._istrue()
+        except TEST_OUTCOME:
+            self.exc = sys.exc_info()
+            if isinstance(self.exc[1], SyntaxError):
+                msg = [" " * (self.exc[1].offset + 4) + "^"]
+                msg.append("SyntaxError: invalid syntax")
+            else:
+                msg = traceback.format_exception_only(*self.exc[:2])
+            fail(
+                "Error evaluating %r expression\n"
+                "    %s\n"
+                "%s" % (self._mark_name, self.expr, "\n".join(msg)),
+                pytrace=False,
+            )
+
+    def _getglobals(self):
+        d = {"os": os, "sys": sys, "platform": platform, "config": self.item.config}
+        if hasattr(self.item, "obj"):
+            d.update(self.item.obj.__globals__)
+        return d
+
+    def _istrue(self):
+        if hasattr(self, "result"):
+            return self.result
+        self._marks = self._get_marks()
+
+        if self._marks:
+            self.result = False
+            for mark in self._marks:
+                self._mark = mark
+                if "condition" in mark.kwargs:
+                    args = (mark.kwargs["condition"],)
+                else:
+                    args = mark.args
+
+                for expr in args:
+                    self.expr = expr
+                    if isinstance(expr, six.string_types):
+                        d = self._getglobals()
+                        result = cached_eval(self.item.config, expr, d)
+                    else:
+                        if "reason" not in mark.kwargs:
+                            # XXX better be checked at collection time
+                            msg = (
+                                "you need to specify reason=STRING "
+                                "when using booleans as conditions."
+                            )
+                            fail(msg)
+                        result = bool(expr)
+                    if result:
+                        self.result = True
+                        self.reason = mark.kwargs.get("reason", None)
+                        self.expr = expr
+                        return self.result
+
+                if not args:
+                    self.result = True
+                    self.reason = mark.kwargs.get("reason", None)
+                    return self.result
+        return False
+
+    def get(self, attr, default=None):
+        if self._mark is None:
+            return default
+        return self._mark.kwargs.get(attr, default)
+
+    def getexplanation(self):
+        expl = getattr(self, "reason", None) or self.get("reason", None)
+        if not expl:
+            if not hasattr(self, "expr"):
+                return ""
+            else:
+                return "condition: " + str(self.expr)
+        return expl
diff --git a/contrib/python/pytest/py2/_pytest/mark/legacy.py b/contrib/python/pytest/py2/_pytest/mark/legacy.py
new file mode 100644
index 0000000000..c56482f14d
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/mark/legacy.py
@@ -0,0 +1,103 @@
+# -*- coding: utf-8 -*-
+"""
+this is a place where we put datastructures used by legacy apis
+we hope ot remove
+"""
+import keyword
+
+import attr
+
+from _pytest.config import UsageError
+
+
+@attr.s
+class MarkMapping(object):
+    """Provides a local mapping for markers where item access
+    resolves to True if the marker is present. """
+
+    own_mark_names = attr.ib()
+
+    @classmethod
+    def from_item(cls, item):
+        mark_names = {mark.name for mark in item.iter_markers()}
+        return cls(mark_names)
+
+    def __getitem__(self, name):
+        return name in self.own_mark_names
+
+
+class KeywordMapping(object):
+    """Provides a local mapping for keywords.
+    Given a list of names, map any substring of one of these names to True.
+    """
+
+    def __init__(self, names):
+        self._names = names
+
+    @classmethod
+    def from_item(cls, item):
+        mapped_names = set()
+
+        # Add the names of the current item and any parent items
+        import pytest
+
+        for item in item.listchain():
+            if not isinstance(item, pytest.Instance):
+                mapped_names.add(item.name)
+
+        # Add the names added as extra keywords to current or parent items
+        mapped_names.update(item.listextrakeywords())
+
+        # Add the names attached to the current function through direct assignment
+        if hasattr(item, "function"):
+            mapped_names.update(item.function.__dict__)
+
+        # add the markers to the keywords as we no longer handle them correctly
+        mapped_names.update(mark.name for mark in item.iter_markers())
+
+        return cls(mapped_names)
+
+    def __getitem__(self, subname):
+        for name in self._names:
+            if subname in name:
+                return True
+        return False
+
+
+python_keywords_allowed_list = ["or", "and", "not"]
+
+
+def matchmark(colitem, markexpr):
+    """Tries to match on any marker names, attached to the given colitem."""
+    try:
+        return eval(markexpr, {}, MarkMapping.from_item(colitem))
+    except SyntaxError as e:
+        raise SyntaxError(str(e) + "\nMarker expression must be valid Python!")
+
+
+def matchkeyword(colitem, keywordexpr):
+    """Tries to match given keyword expression to given collector item.
+
+    Will match on the name of colitem, including the names of its parents.
+    Only matches names of items which are either a :class:`Class` or a
+    :class:`Function`.
+    Additionally, matches on names in the 'extra_keyword_matches' set of
+    any item, as well as names directly assigned to test functions.
+    """
+    mapping = KeywordMapping.from_item(colitem)
+    if " " not in keywordexpr:
+        # special case to allow for simple "-k pass" and "-k 1.3"
+        return mapping[keywordexpr]
+    elif keywordexpr.startswith("not ") and " " not in keywordexpr[4:]:
+        return not mapping[keywordexpr[4:]]
+    for kwd in keywordexpr.split():
+        if keyword.iskeyword(kwd) and kwd not in python_keywords_allowed_list:
+            raise UsageError(
+                "Python keyword '{}' not accepted in expressions passed to '-k'".format(
+                    kwd
+                )
+            )
+    try:
+        return eval(keywordexpr, {}, mapping)
+    except SyntaxError:
+        raise UsageError("Wrong expression passed to '-k': {}".format(keywordexpr))
diff --git a/contrib/python/pytest/py2/_pytest/mark/structures.py b/contrib/python/pytest/py2/_pytest/mark/structures.py
new file mode 100644
index 0000000000..aaebe927be
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/mark/structures.py
@@ -0,0 +1,413 @@
+# -*- coding: utf-8 -*-
+import inspect
+import warnings
+from collections import namedtuple
+from operator import attrgetter
+
+import attr
+import six
+
+from ..compat import ascii_escaped
+from ..compat import ATTRS_EQ_FIELD
+from ..compat import getfslineno
+from ..compat import MappingMixin
+from ..compat import NOTSET
+from _pytest.deprecated import PYTEST_PARAM_UNKNOWN_KWARGS
+from _pytest.outcomes import fail
+from _pytest.warning_types import PytestUnknownMarkWarning
+
+EMPTY_PARAMETERSET_OPTION = "empty_parameter_set_mark"
+
+
+def alias(name, warning=None):
+    getter = attrgetter(name)
+
+    def warned(self):
+        warnings.warn(warning, stacklevel=2)
+        return getter(self)
+
+    return property(getter if warning is None else warned, doc="alias for " + name)
+
+
+def istestfunc(func):
+    return (
+        hasattr(func, "__call__")
+        and getattr(func, "__name__", "<lambda>") != "<lambda>"
+    )
+
+
+def get_empty_parameterset_mark(config, argnames, func):
+    from ..nodes import Collector
+
+    requested_mark = config.getini(EMPTY_PARAMETERSET_OPTION)
+    if requested_mark in ("", None, "skip"):
+        mark = MARK_GEN.skip
+    elif requested_mark == "xfail":
+        mark = MARK_GEN.xfail(run=False)
+    elif requested_mark == "fail_at_collect":
+        f_name = func.__name__
+        _, lineno = getfslineno(func)
+        raise Collector.CollectError(
+            "Empty parameter set in '%s' at line %d" % (f_name, lineno + 1)
+        )
+    else:
+        raise LookupError(requested_mark)
+    fs, lineno = getfslineno(func)
+    reason = "got empty parameter set %r, function %s at %s:%d" % (
+        argnames,
+        func.__name__,
+        fs,
+        lineno,
+    )
+    return mark(reason=reason)
+
+
+class ParameterSet(namedtuple("ParameterSet", "values, marks, id")):
+    @classmethod
+    def param(cls, *values, **kwargs):
+        marks = kwargs.pop("marks", ())
+        if isinstance(marks, MarkDecorator):
+            marks = (marks,)
+        else:
+            assert isinstance(marks, (tuple, list, set))
+
+        id_ = kwargs.pop("id", None)
+        if id_ is not None:
+            if not isinstance(id_, six.string_types):
+                raise TypeError(
+                    "Expected id to be a string, got {}: {!r}".format(type(id_), id_)
+                )
+            id_ = ascii_escaped(id_)
+
+        if kwargs:
+            warnings.warn(
+                PYTEST_PARAM_UNKNOWN_KWARGS.format(args=sorted(kwargs)), stacklevel=3
+            )
+        return cls(values, marks, id_)
+
+    @classmethod
+    def extract_from(cls, parameterset, force_tuple=False):
+        """
+        :param parameterset:
+            a legacy style parameterset that may or may not be a tuple,
+            and may or may not be wrapped into a mess of mark objects
+
+        :param force_tuple:
+            enforce tuple wrapping so single argument tuple values
+            don't get decomposed and break tests
+        """
+
+        if isinstance(parameterset, cls):
+            return parameterset
+        if force_tuple:
+            return cls.param(parameterset)
+        else:
+            return cls(parameterset, marks=[], id=None)
+
+    @staticmethod
+    def _parse_parametrize_args(argnames, argvalues, *args, **kwargs):
+        if not isinstance(argnames, (tuple, list)):
+            argnames = [x.strip() for x in argnames.split(",") if x.strip()]
+            force_tuple = len(argnames) == 1
+        else:
+            force_tuple = False
+        return argnames, force_tuple
+
+    @staticmethod
+    def _parse_parametrize_parameters(argvalues, force_tuple):
+        return [
+            ParameterSet.extract_from(x, force_tuple=force_tuple) for x in argvalues
+        ]
+
+    @classmethod
+    def _for_parametrize(cls, argnames, argvalues, func, config, function_definition):
+        argnames, force_tuple = cls._parse_parametrize_args(argnames, argvalues)
+        parameters = cls._parse_parametrize_parameters(argvalues, force_tuple)
+        del argvalues
+
+        if parameters:
+            # check all parameter sets have the correct number of values
+            for param in parameters:
+                if len(param.values) != len(argnames):
+                    msg = (
+                        '{nodeid}: in "parametrize" the number of names ({names_len}):\n'
+                        "  {names}\n"
+                        "must be equal to the number of values ({values_len}):\n"
+                        "  {values}"
+                    )
+                    fail(
+                        msg.format(
+                            nodeid=function_definition.nodeid,
+                            values=param.values,
+                            names=argnames,
+                            names_len=len(argnames),
+                            values_len=len(param.values),
+                        ),
+                        pytrace=False,
+                    )
+        else:
+            # empty parameter set (likely computed at runtime): create a single
+            # parameter set with NOTSET values, with the "empty parameter set" mark applied to it
+            mark = get_empty_parameterset_mark(config, argnames, func)
+            parameters.append(
+                ParameterSet(values=(NOTSET,) * len(argnames), marks=[mark], id=None)
+            )
+        return argnames, parameters
+
+
+@attr.s(frozen=True)
+class Mark(object):
+    #: name of the mark
+    name = attr.ib(type=str)
+    #: positional arguments of the mark decorator
+    args = attr.ib()  # List[object]
+    #: keyword arguments of the mark decorator
+    kwargs = attr.ib()  # Dict[str, object]
+
+    def combined_with(self, other):
+        """
+        :param other: the mark to combine with
+        :type other: Mark
+        :rtype: Mark
+
+        combines by appending args and merging the mappings
+        """
+        assert self.name == other.name
+        return Mark(
+            self.name, self.args + other.args, dict(self.kwargs, **other.kwargs)
+        )
+
+
+@attr.s
+class MarkDecorator(object):
+    """ A decorator for test functions and test classes.  When applied
+    it will create :class:`MarkInfo` objects which may be
+    :ref:`retrieved by hooks as item keywords <excontrolskip>`.
+    MarkDecorator instances are often created like this::
+
+        mark1 = pytest.mark.NAME              # simple MarkDecorator
+        mark2 = pytest.mark.NAME(name1=value) # parametrized MarkDecorator
+
+    and can then be applied as decorators to test functions::
+
+        @mark2
+        def test_function():
+            pass
+
+    When a MarkDecorator instance is called it does the following:
+      1. If called with a single class as its only positional argument and no
+         additional keyword arguments, it attaches itself to the class so it
+         gets applied automatically to all test cases found in that class.
+      2. If called with a single function as its only positional argument and
+         no additional keyword arguments, it attaches a MarkInfo object to the
+         function, containing all the arguments already stored internally in
+         the MarkDecorator.
+      3. When called in any other case, it performs a 'fake construction' call,
+         i.e. it returns a new MarkDecorator instance with the original
+         MarkDecorator's content updated with the arguments passed to this
+         call.
+
+    Note: The rules above prevent MarkDecorator objects from storing only a
+    single function or class reference as their positional argument with no
+    additional keyword or positional arguments.
+
+    """
+
+    mark = attr.ib(validator=attr.validators.instance_of(Mark))
+
+    name = alias("mark.name")
+    args = alias("mark.args")
+    kwargs = alias("mark.kwargs")
+
+    @property
+    def markname(self):
+        return self.name  # for backward-compat (2.4.1 had this attr)
+
+    def __eq__(self, other):
+        return self.mark == other.mark if isinstance(other, MarkDecorator) else False
+
+    def __repr__(self):
+        return "<MarkDecorator %r>" % (self.mark,)
+
+    def with_args(self, *args, **kwargs):
+        """ return a MarkDecorator with extra arguments added
+
+        unlike call this can be used even if the sole argument is a callable/class
+
+        :return: MarkDecorator
+        """
+
+        mark = Mark(self.name, args, kwargs)
+        return self.__class__(self.mark.combined_with(mark))
+
+    def __call__(self, *args, **kwargs):
+        """ if passed a single callable argument: decorate it with mark info.
+            otherwise add *args/**kwargs in-place to mark information. """
+        if args and not kwargs:
+            func = args[0]
+            is_class = inspect.isclass(func)
+            if len(args) == 1 and (istestfunc(func) or is_class):
+                store_mark(func, self.mark)
+                return func
+        return self.with_args(*args, **kwargs)
+
+
+def get_unpacked_marks(obj):
+    """
+    obtain the unpacked marks that are stored on an object
+    """
+    mark_list = getattr(obj, "pytestmark", [])
+    if not isinstance(mark_list, list):
+        mark_list = [mark_list]
+    return normalize_mark_list(mark_list)
+
+
+def normalize_mark_list(mark_list):
+    """
+    normalizes marker decorating helpers to mark objects
+
+    :type mark_list: List[Union[Mark, Markdecorator]]
+    :rtype: List[Mark]
+    """
+    extracted = [
+        getattr(mark, "mark", mark) for mark in mark_list
+    ]  # unpack MarkDecorator
+    for mark in extracted:
+        if not isinstance(mark, Mark):
+            raise TypeError("got {!r} instead of Mark".format(mark))
+    return [x for x in extracted if isinstance(x, Mark)]
+
+
+def store_mark(obj, mark):
+    """store a Mark on an object
+    this is used to implement the Mark declarations/decorators correctly
+    """
+    assert isinstance(mark, Mark), mark
+    # always reassign name to avoid updating pytestmark
+    # in a reference that was only borrowed
+    obj.pytestmark = get_unpacked_marks(obj) + [mark]
+
+
+class MarkGenerator(object):
+    """ Factory for :class:`MarkDecorator` objects - exposed as
+    a ``pytest.mark`` singleton instance.  Example::
+
+         import pytest
+         @pytest.mark.slowtest
+         def test_function():
+            pass
+
+    will set a 'slowtest' :class:`MarkInfo` object
+    on the ``test_function`` object. """
+
+    _config = None
+    _markers = set()
+
+    def __getattr__(self, name):
+        if name[0] == "_":
+            raise AttributeError("Marker name must NOT start with underscore")
+
+        if self._config is not None:
+            # We store a set of markers as a performance optimisation - if a mark
+            # name is in the set we definitely know it, but a mark may be known and
+            # not in the set.  We therefore start by updating the set!
+            if name not in self._markers:
+                for line in self._config.getini("markers"):
+                    # example lines: "skipif(condition): skip the given test if..."
+                    # or "hypothesis: tests which use Hypothesis", so to get the
+                    # marker name we split on both `:` and `(`.
+                    if line == "ya:external":
+                        marker = line
+                    else:
+                        marker = line.split(":")[0].split("(")[0].strip()
+                    self._markers.add(marker)
+
+            # If the name is not in the set of known marks after updating,
+            # then it really is time to issue a warning or an error.
+            if name not in self._markers:
+                if self._config.option.strict_markers:
+                    fail(
+                        "{!r} not found in `markers` configuration option".format(name),
+                        pytrace=False,
+                    )
+                else:
+                    warnings.warn(
+                        "Unknown pytest.mark.%s - is this a typo?  You can register "
+                        "custom marks to avoid this warning - for details, see "
+                        "https://docs.pytest.org/en/latest/mark.html" % name,
+                        PytestUnknownMarkWarning,
+                    )
+
+        return MarkDecorator(Mark(name, (), {}))
+
+
+MARK_GEN = MarkGenerator()
+
+
+class NodeKeywords(MappingMixin):
+    def __init__(self, node):
+        self.node = node
+        self.parent = node.parent
+        self._markers = {node.name: True}
+
+    def __getitem__(self, key):
+        try:
+            return self._markers[key]
+        except KeyError:
+            if self.parent is None:
+                raise
+            return self.parent.keywords[key]
+
+    def __setitem__(self, key, value):
+        self._markers[key] = value
+
+    def __delitem__(self, key):
+        raise ValueError("cannot delete key in keywords dict")
+
+    def __iter__(self):
+        seen = self._seen()
+        return iter(seen)
+
+    def _seen(self):
+        seen = set(self._markers)
+        if self.parent is not None:
+            seen.update(self.parent.keywords)
+        return seen
+
+    def __len__(self):
+        return len(self._seen())
+
+    def __repr__(self):
+        return "<NodeKeywords for node %s>" % (self.node,)
+
+
+# mypy cannot find this overload, remove when on attrs>=19.2
+@attr.s(hash=False, **{ATTRS_EQ_FIELD: False})  # type: ignore
+class NodeMarkers(object):
+    """
+    internal structure for storing marks belonging to a node
+
+    ..warning::
+
+        unstable api
+
+    """
+
+    own_markers = attr.ib(default=attr.Factory(list))
+
+    def update(self, add_markers):
+        """update the own markers
+        """
+        self.own_markers.extend(add_markers)
+
+    def find(self, name):
+        """
+        find markers in own nodes or parent nodes
+        needs a better place
+        """
+        for mark in self.own_markers:
+            if mark.name == name:
+                yield mark
+
+    def __iter__(self):
+        return iter(self.own_markers)
diff --git a/contrib/python/pytest/py2/_pytest/monkeypatch.py b/contrib/python/pytest/py2/_pytest/monkeypatch.py
new file mode 100644
index 0000000000..e8671b0c70
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/monkeypatch.py
@@ -0,0 +1,336 @@
+# -*- coding: utf-8 -*-
+""" monkeypatching and mocking functionality.  """
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import os
+import re
+import sys
+import warnings
+from contextlib import contextmanager
+
+import six
+
+import pytest
+from _pytest.fixtures import fixture
+from _pytest.pathlib import Path
+
+RE_IMPORT_ERROR_NAME = re.compile(r"^No module named (.*)$")
+
+
+@fixture
+def monkeypatch():
+    """The returned ``monkeypatch`` fixture provides these
+    helper methods to modify objects, dictionaries or os.environ::
+
+        monkeypatch.setattr(obj, name, value, raising=True)
+        monkeypatch.delattr(obj, name, raising=True)
+        monkeypatch.setitem(mapping, name, value)
+        monkeypatch.delitem(obj, name, raising=True)
+        monkeypatch.setenv(name, value, prepend=False)
+        monkeypatch.delenv(name, raising=True)
+        monkeypatch.syspath_prepend(path)
+        monkeypatch.chdir(path)
+
+    All modifications will be undone after the requesting
+    test function or fixture has finished. The ``raising``
+    parameter determines if a KeyError or AttributeError
+    will be raised if the set/deletion operation has no target.
+    """
+    mpatch = MonkeyPatch()
+    yield mpatch
+    mpatch.undo()
+
+
+def resolve(name):
+    # simplified from zope.dottedname
+    parts = name.split(".")
+
+    used = parts.pop(0)
+    found = __import__(used)
+    for part in parts:
+        used += "." + part
+        try:
+            found = getattr(found, part)
+        except AttributeError:
+            pass
+        else:
+            continue
+        # we use explicit un-nesting of the handling block in order
+        # to avoid nested exceptions on python 3
+        try:
+            __import__(used)
+        except ImportError as ex:
+            # str is used for py2 vs py3
+            expected = str(ex).split()[-1]
+            if expected == used:
+                raise
+            else:
+                raise ImportError("import error in %s: %s" % (used, ex))
+        found = annotated_getattr(found, part, used)
+    return found
+
+
+def annotated_getattr(obj, name, ann):
+    try:
+        obj = getattr(obj, name)
+    except AttributeError:
+        raise AttributeError(
+            "%r object at %s has no attribute %r" % (type(obj).__name__, ann, name)
+        )
+    return obj
+
+
+def derive_importpath(import_path, raising):
+    if not isinstance(import_path, six.string_types) or "." not in import_path:
+        raise TypeError("must be absolute import path string, not %r" % (import_path,))
+    module, attr = import_path.rsplit(".", 1)
+    target = resolve(module)
+    if raising:
+        annotated_getattr(target, attr, ann=module)
+    return attr, target
+
+
+class Notset(object):
+    def __repr__(self):
+        return "<notset>"
+
+
+notset = Notset()
+
+
+class MonkeyPatch(object):
+    """ Object returned by the ``monkeypatch`` fixture keeping a record of setattr/item/env/syspath changes.
+    """
+
+    def __init__(self):
+        self._setattr = []
+        self._setitem = []
+        self._cwd = None
+        self._savesyspath = None
+
+    @contextmanager
+    def context(self):
+        """
+        Context manager that returns a new :class:`MonkeyPatch` object which
+        undoes any patching done inside the ``with`` block upon exit:
+
+        .. code-block:: python
+
+            import functools
+            def test_partial(monkeypatch):
+                with monkeypatch.context() as m:
+                    m.setattr(functools, "partial", 3)
+
+        Useful in situations where it is desired to undo some patches before the test ends,
+        such as mocking ``stdlib`` functions that might break pytest itself if mocked (for examples
+        of this see `#3290 <https://github.com/pytest-dev/pytest/issues/3290>`_.
+        """
+        m = MonkeyPatch()
+        try:
+            yield m
+        finally:
+            m.undo()
+
+    def setattr(self, target, name, value=notset, raising=True):
+        """ Set attribute value on target, memorizing the old value.
+        By default raise AttributeError if the attribute did not exist.
+
+        For convenience you can specify a string as ``target`` which
+        will be interpreted as a dotted import path, with the last part
+        being the attribute name.  Example:
+        ``monkeypatch.setattr("os.getcwd", lambda: "/")``
+        would set the ``getcwd`` function of the ``os`` module.
+
+        The ``raising`` value determines if the setattr should fail
+        if the attribute is not already present (defaults to True
+        which means it will raise).
+        """
+        __tracebackhide__ = True
+        import inspect
+
+        if value is notset:
+            if not isinstance(target, six.string_types):
+                raise TypeError(
+                    "use setattr(target, name, value) or "
+                    "setattr(target, value) with target being a dotted "
+                    "import string"
+                )
+            value = name
+            name, target = derive_importpath(target, raising)
+
+        oldval = getattr(target, name, notset)
+        if raising and oldval is notset:
+            raise AttributeError("%r has no attribute %r" % (target, name))
+
+        # avoid class descriptors like staticmethod/classmethod
+        if inspect.isclass(target):
+            oldval = target.__dict__.get(name, notset)
+        self._setattr.append((target, name, oldval))
+        setattr(target, name, value)
+
+    def delattr(self, target, name=notset, raising=True):
+        """ Delete attribute ``name`` from ``target``, by default raise
+        AttributeError it the attribute did not previously exist.
+
+        If no ``name`` is specified and ``target`` is a string
+        it will be interpreted as a dotted import path with the
+        last part being the attribute name.
+
+        If ``raising`` is set to False, no exception will be raised if the
+        attribute is missing.
+        """
+        __tracebackhide__ = True
+        import inspect
+
+        if name is notset:
+            if not isinstance(target, six.string_types):
+                raise TypeError(
+                    "use delattr(target, name) or "
+                    "delattr(target) with target being a dotted "
+                    "import string"
+                )
+            name, target = derive_importpath(target, raising)
+
+        if not hasattr(target, name):
+            if raising:
+                raise AttributeError(name)
+        else:
+            oldval = getattr(target, name, notset)
+            # Avoid class descriptors like staticmethod/classmethod.
+            if inspect.isclass(target):
+                oldval = target.__dict__.get(name, notset)
+            self._setattr.append((target, name, oldval))
+            delattr(target, name)
+
+    def setitem(self, dic, name, value):
+        """ Set dictionary entry ``name`` to value. """
+        self._setitem.append((dic, name, dic.get(name, notset)))
+        dic[name] = value
+
+    def delitem(self, dic, name, raising=True):
+        """ Delete ``name`` from dict. Raise KeyError if it doesn't exist.
+
+        If ``raising`` is set to False, no exception will be raised if the
+        key is missing.
+        """
+        if name not in dic:
+            if raising:
+                raise KeyError(name)
+        else:
+            self._setitem.append((dic, name, dic.get(name, notset)))
+            del dic[name]
+
+    def _warn_if_env_name_is_not_str(self, name):
+        """On Python 2, warn if the given environment variable name is not a native str (#4056)"""
+        if six.PY2 and not isinstance(name, str):
+            warnings.warn(
+                pytest.PytestWarning(
+                    "Environment variable name {!r} should be str".format(name)
+                )
+            )
+
+    def setenv(self, name, value, prepend=None):
+        """ Set environment variable ``name`` to ``value``.  If ``prepend``
+        is a character, read the current environment variable value
+        and prepend the ``value`` adjoined with the ``prepend`` character."""
+        if not isinstance(value, str):
+            warnings.warn(
+                pytest.PytestWarning(
+                    "Value of environment variable {name} type should be str, but got "
+                    "{value!r} (type: {type}); converted to str implicitly".format(
+                        name=name, value=value, type=type(value).__name__
+                    )
+                ),
+                stacklevel=2,
+            )
+            value = str(value)
+        if prepend and name in os.environ:
+            value = value + prepend + os.environ[name]
+        self._warn_if_env_name_is_not_str(name)
+        self.setitem(os.environ, name, value)
+
+    def delenv(self, name, raising=True):
+        """ Delete ``name`` from the environment. Raise KeyError if it does
+        not exist.
+
+        If ``raising`` is set to False, no exception will be raised if the
+        environment variable is missing.
+        """
+        self._warn_if_env_name_is_not_str(name)
+        self.delitem(os.environ, name, raising=raising)
+
+    def syspath_prepend(self, path):
+        """ Prepend ``path`` to ``sys.path`` list of import locations. """
+        from pkg_resources import fixup_namespace_packages
+
+        if self._savesyspath is None:
+            self._savesyspath = sys.path[:]
+        sys.path.insert(0, str(path))
+
+        # https://github.com/pypa/setuptools/blob/d8b901bc/docs/pkg_resources.txt#L162-L171
+        fixup_namespace_packages(str(path))
+
+        # A call to syspathinsert() usually means that the caller wants to
+        # import some dynamically created files, thus with python3 we
+        # invalidate its import caches.
+        # This is especially important when any namespace package is in used,
+        # since then the mtime based FileFinder cache (that gets created in
+        # this case already) gets not invalidated when writing the new files
+        # quickly afterwards.
+        if sys.version_info >= (3, 3):
+            from importlib import invalidate_caches
+
+            invalidate_caches()
+
+    def chdir(self, path):
+        """ Change the current working directory to the specified path.
+        Path can be a string or a py.path.local object.
+        """
+        if self._cwd is None:
+            self._cwd = os.getcwd()
+        if hasattr(path, "chdir"):
+            path.chdir()
+        elif isinstance(path, Path):
+            # modern python uses the fspath protocol here LEGACY
+            os.chdir(str(path))
+        else:
+            os.chdir(path)
+
+    def undo(self):
+        """ Undo previous changes.  This call consumes the
+        undo stack. Calling it a second time has no effect unless
+        you do more monkeypatching after the undo call.
+
+        There is generally no need to call `undo()`, since it is
+        called automatically during tear-down.
+
+        Note that the same `monkeypatch` fixture is used across a
+        single test function invocation. If `monkeypatch` is used both by
+        the test function itself and one of the test fixtures,
+        calling `undo()` will undo all of the changes made in
+        both functions.
+        """
+        for obj, name, value in reversed(self._setattr):
+            if value is not notset:
+                setattr(obj, name, value)
+            else:
+                delattr(obj, name)
+        self._setattr[:] = []
+        for dictionary, name, value in reversed(self._setitem):
+            if value is notset:
+                try:
+                    del dictionary[name]
+                except KeyError:
+                    pass  # was already deleted, so we have the desired state
+            else:
+                dictionary[name] = value
+        self._setitem[:] = []
+        if self._savesyspath is not None:
+            sys.path[:] = self._savesyspath
+            self._savesyspath = None
+
+        if self._cwd is not None:
+            os.chdir(self._cwd)
+            self._cwd = None
diff --git a/contrib/python/pytest/py2/_pytest/nodes.py b/contrib/python/pytest/py2/_pytest/nodes.py
new file mode 100644
index 0000000000..206e9ae163
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/nodes.py
@@ -0,0 +1,429 @@
+# -*- coding: utf-8 -*-
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import os
+import warnings
+
+import py
+import six
+
+import _pytest._code
+from _pytest.compat import getfslineno
+from _pytest.mark.structures import NodeKeywords
+from _pytest.outcomes import fail
+
+SEP = "/"
+
+tracebackcutdir = py.path.local(_pytest.__file__).dirpath()
+
+
+def _splitnode(nodeid):
+    """Split a nodeid into constituent 'parts'.
+
+    Node IDs are strings, and can be things like:
+        ''
+        'testing/code'
+        'testing/code/test_excinfo.py'
+        'testing/code/test_excinfo.py::TestFormattedExcinfo'
+
+    Return values are lists e.g.
+        []
+        ['testing', 'code']
+        ['testing', 'code', 'test_excinfo.py']
+        ['testing', 'code', 'test_excinfo.py', 'TestFormattedExcinfo', '()']
+    """
+    if nodeid == "":
+        # If there is no root node at all, return an empty list so the caller's logic can remain sane
+        return []
+    parts = nodeid.split(SEP)
+    # Replace single last element 'test_foo.py::Bar' with multiple elements 'test_foo.py', 'Bar'
+    parts[-1:] = parts[-1].split("::")
+    return parts
+
+
+def ischildnode(baseid, nodeid):
+    """Return True if the nodeid is a child node of the baseid.
+
+    E.g. 'foo/bar::Baz' is a child of 'foo', 'foo/bar' and 'foo/bar::Baz', but not of 'foo/blorp'
+    """
+    base_parts = _splitnode(baseid)
+    node_parts = _splitnode(nodeid)
+    if len(node_parts) < len(base_parts):
+        return False
+    return node_parts[: len(base_parts)] == base_parts
+
+
+class Node(object):
+    """ base class for Collector and Item the test collection tree.
+    Collector subclasses have children, Items are terminal nodes."""
+
+    def __init__(
+        self, name, parent=None, config=None, session=None, fspath=None, nodeid=None
+    ):
+        #: a unique name within the scope of the parent node
+        self.name = name
+
+        #: the parent collector node.
+        self.parent = parent
+
+        #: the pytest config object
+        self.config = config or parent.config
+
+        #: the session this node is part of
+        self.session = session or parent.session
+
+        #: filesystem path where this node was collected from (can be None)
+        self.fspath = fspath or getattr(parent, "fspath", None)
+
+        #: keywords/markers collected from all scopes
+        self.keywords = NodeKeywords(self)
+
+        #: the marker objects belonging to this node
+        self.own_markers = []
+
+        #: allow adding of extra keywords to use for matching
+        self.extra_keyword_matches = set()
+
+        # used for storing artificial fixturedefs for direct parametrization
+        self._name2pseudofixturedef = {}
+
+        if nodeid is not None:
+            assert "::()" not in nodeid
+            self._nodeid = nodeid
+        else:
+            self._nodeid = self.parent.nodeid
+            if self.name != "()":
+                self._nodeid += "::" + self.name
+
+    @property
+    def ihook(self):
+        """ fspath sensitive hook proxy used to call pytest hooks"""
+        return self.session.gethookproxy(self.fspath)
+
+    def __repr__(self):
+        return "<%s %s>" % (self.__class__.__name__, getattr(self, "name", None))
+
+    def warn(self, warning):
+        """Issue a warning for this item.
+
+        Warnings will be displayed after the test session, unless explicitly suppressed
+
+        :param Warning warning: the warning instance to issue. Must be a subclass of PytestWarning.
+
+        :raise ValueError: if ``warning`` instance is not a subclass of PytestWarning.
+
+        Example usage:
+
+        .. code-block:: python
+
+            node.warn(PytestWarning("some message"))
+
+        """
+        from _pytest.warning_types import PytestWarning
+
+        if not isinstance(warning, PytestWarning):
+            raise ValueError(
+                "warning must be an instance of PytestWarning or subclass, got {!r}".format(
+                    warning
+                )
+            )
+        path, lineno = get_fslocation_from_item(self)
+        warnings.warn_explicit(
+            warning,
+            category=None,
+            filename=str(path),
+            lineno=lineno + 1 if lineno is not None else None,
+        )
+
+    # methods for ordering nodes
+    @property
+    def nodeid(self):
+        """ a ::-separated string denoting its collection tree address. """
+        return self._nodeid
+
+    def __hash__(self):
+        return hash(self.nodeid)
+
+    def setup(self):
+        pass
+
+    def teardown(self):
+        pass
+
+    def listchain(self):
+        """ return list of all parent collectors up to self,
+            starting from root of collection tree. """
+        chain = []
+        item = self
+        while item is not None:
+            chain.append(item)
+            item = item.parent
+        chain.reverse()
+        return chain
+
+    def add_marker(self, marker, append=True):
+        """dynamically add a marker object to the node.
+
+        :type marker: ``str`` or ``pytest.mark.*``  object
+        :param marker:
+            ``append=True`` whether to append the marker,
+            if ``False`` insert at position ``0``.
+        """
+        from _pytest.mark import MarkDecorator, MARK_GEN
+
+        if isinstance(marker, six.string_types):
+            marker = getattr(MARK_GEN, marker)
+        elif not isinstance(marker, MarkDecorator):
+            raise ValueError("is not a string or pytest.mark.* Marker")
+        self.keywords[marker.name] = marker
+        if append:
+            self.own_markers.append(marker.mark)
+        else:
+            self.own_markers.insert(0, marker.mark)
+
+    def iter_markers(self, name=None):
+        """
+        :param name: if given, filter the results by the name attribute
+
+        iterate over all markers of the node
+        """
+        return (x[1] for x in self.iter_markers_with_node(name=name))
+
+    def iter_markers_with_node(self, name=None):
+        """
+        :param name: if given, filter the results by the name attribute
+
+        iterate over all markers of the node
+        returns sequence of tuples (node, mark)
+        """
+        for node in reversed(self.listchain()):
+            for mark in node.own_markers:
+                if name is None or getattr(mark, "name", None) == name:
+                    yield node, mark
+
+    def get_closest_marker(self, name, default=None):
+        """return the first marker matching the name, from closest (for example function) to farther level (for example
+        module level).
+
+        :param default: fallback return value of no marker was found
+        :param name: name to filter by
+        """
+        return next(self.iter_markers(name=name), default)
+
+    def listextrakeywords(self):
+        """ Return a set of all extra keywords in self and any parents."""
+        extra_keywords = set()
+        for item in self.listchain():
+            extra_keywords.update(item.extra_keyword_matches)
+        return extra_keywords
+
+    def listnames(self):
+        return [x.name for x in self.listchain()]
+
+    def addfinalizer(self, fin):
+        """ register a function to be called when this node is finalized.
+
+        This method can only be called when this node is active
+        in a setup chain, for example during self.setup().
+        """
+        self.session._setupstate.addfinalizer(fin, self)
+
+    def getparent(self, cls):
+        """ get the next parent node (including ourself)
+        which is an instance of the given class"""
+        current = self
+        while current and not isinstance(current, cls):
+            current = current.parent
+        return current
+
+    def _prunetraceback(self, excinfo):
+        pass
+
+    def _repr_failure_py(self, excinfo, style=None):
+        if excinfo.errisinstance(fail.Exception):
+            if not excinfo.value.pytrace:
+                return six.text_type(excinfo.value)
+        fm = self.session._fixturemanager
+        if excinfo.errisinstance(fm.FixtureLookupError):
+            return excinfo.value.formatrepr()
+        tbfilter = True
+        if self.config.getoption("fulltrace", False):
+            style = "long"
+        else:
+            tb = _pytest._code.Traceback([excinfo.traceback[-1]])
+            self._prunetraceback(excinfo)
+            if len(excinfo.traceback) == 0:
+                excinfo.traceback = tb
+            tbfilter = False  # prunetraceback already does it
+            if style == "auto":
+                style = "long"
+        # XXX should excinfo.getrepr record all data and toterminal() process it?
+        if style is None:
+            if self.config.getoption("tbstyle", "auto") == "short":
+                style = "short"
+            else:
+                style = "long"
+
+        if self.config.getoption("verbose", 0) > 1:
+            truncate_locals = False
+        else:
+            truncate_locals = True
+
+        try:
+            os.getcwd()
+            abspath = False
+        except OSError:
+            abspath = True
+
+        return excinfo.getrepr(
+            funcargs=True,
+            abspath=abspath,
+            showlocals=self.config.getoption("showlocals", False),
+            style=style,
+            tbfilter=tbfilter,
+            truncate_locals=truncate_locals,
+        )
+
+    repr_failure = _repr_failure_py
+
+
+def get_fslocation_from_item(item):
+    """Tries to extract the actual location from an item, depending on available attributes:
+
+    * "fslocation": a pair (path, lineno)
+    * "obj": a Python object that the item wraps.
+    * "fspath": just a path
+
+    :rtype: a tuple of (str|LocalPath, int) with filename and line number.
+    """
+    result = getattr(item, "location", None)
+    if result is not None:
+        return result[:2]
+    obj = getattr(item, "obj", None)
+    if obj is not None:
+        return getfslineno(obj)
+    return getattr(item, "fspath", "unknown location"), -1
+
+
+class Collector(Node):
+    """ Collector instances create children through collect()
+        and thus iteratively build a tree.
+    """
+
+    class CollectError(Exception):
+        """ an error during collection, contains a custom message. """
+
+    def collect(self):
+        """ returns a list of children (items and collectors)
+            for this collection node.
+        """
+        raise NotImplementedError("abstract")
+
+    def repr_failure(self, excinfo):
+        """ represent a collection failure. """
+        if excinfo.errisinstance(self.CollectError):
+            exc = excinfo.value
+            return str(exc.args[0])
+
+        # Respect explicit tbstyle option, but default to "short"
+        # (None._repr_failure_py defaults to "long" without "fulltrace" option).
+        tbstyle = self.config.getoption("tbstyle", "auto")
+        if tbstyle == "auto":
+            tbstyle = "short"
+
+        return self._repr_failure_py(excinfo, style=tbstyle)
+
+    def _prunetraceback(self, excinfo):
+        if hasattr(self, "fspath"):
+            traceback = excinfo.traceback
+            ntraceback = traceback.cut(path=self.fspath)
+            if ntraceback == traceback:
+                ntraceback = ntraceback.cut(excludepath=tracebackcutdir)
+            excinfo.traceback = ntraceback.filter()
+
+
+def _check_initialpaths_for_relpath(session, fspath):
+    for initial_path in session._initialpaths:
+        if fspath.common(initial_path) == initial_path:
+            return fspath.relto(initial_path)
+
+
+class FSCollector(Collector):
+    def __init__(self, fspath, parent=None, config=None, session=None, nodeid=None):
+        fspath = py.path.local(fspath)  # xxx only for test_resultlog.py?
+        name = fspath.basename
+        if parent is not None:
+            rel = fspath.relto(parent.fspath)
+            if rel:
+                name = rel
+            name = name.replace(os.sep, SEP)
+        self.fspath = fspath
+
+        session = session or parent.session
+
+        if nodeid is None:
+            nodeid = self.fspath.relto(session.config.rootdir)
+
+            if not nodeid:
+                nodeid = _check_initialpaths_for_relpath(session, fspath)
+            if nodeid and os.sep != SEP:
+                nodeid = nodeid.replace(os.sep, SEP)
+
+        super(FSCollector, self).__init__(
+            name, parent, config, session, nodeid=nodeid, fspath=fspath
+        )
+
+
+class File(FSCollector):
+    """ base class for collecting tests from a file. """
+
+
+class Item(Node):
+    """ a basic test invocation item. Note that for a single function
+    there might be multiple test invocation items.
+    """
+
+    nextitem = None
+
+    def __init__(self, name, parent=None, config=None, session=None, nodeid=None):
+        super(Item, self).__init__(name, parent, config, session, nodeid=nodeid)
+        self._report_sections = []
+
+        #: user properties is a list of tuples (name, value) that holds user
+        #: defined properties for this test.
+        self.user_properties = []
+
+    def add_report_section(self, when, key, content):
+        """
+        Adds a new report section, similar to what's done internally to add stdout and
+        stderr captured output::
+
+            item.add_report_section("call", "stdout", "report section contents")
+
+        :param str when:
+            One of the possible capture states, ``"setup"``, ``"call"``, ``"teardown"``.
+        :param str key:
+            Name of the section, can be customized at will. Pytest uses ``"stdout"`` and
+            ``"stderr"`` internally.
+
+        :param str content:
+            The full contents as a string.
+        """
+        if content:
+            self._report_sections.append((when, key, content))
+
+    def reportinfo(self):
+        return self.fspath, None, ""
+
+    @property
+    def location(self):
+        try:
+            return self._location
+        except AttributeError:
+            location = self.reportinfo()
+            fspath = self.session._node_location_to_relpath(location[0])
+            location = (fspath, location[1], str(location[2]))
+            self._location = location
+            return location
diff --git a/contrib/python/pytest/py2/_pytest/nose.py b/contrib/python/pytest/py2/_pytest/nose.py
new file mode 100644
index 0000000000..fbab91da24
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/nose.py
@@ -0,0 +1,70 @@
+# -*- coding: utf-8 -*-
+""" run test suites written for nose. """
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import sys
+
+import six
+
+import pytest
+from _pytest import python
+from _pytest import runner
+from _pytest import unittest
+from _pytest.config import hookimpl
+
+
+def get_skip_exceptions():
+    skip_classes = set()
+    for module_name in ("unittest", "unittest2", "nose"):
+        mod = sys.modules.get(module_name)
+        if hasattr(mod, "SkipTest"):
+            skip_classes.add(mod.SkipTest)
+    return tuple(skip_classes)
+
+
+def pytest_runtest_makereport(item, call):
+    if call.excinfo and call.excinfo.errisinstance(get_skip_exceptions()):
+        # let's substitute the excinfo with a pytest.skip one
+        call2 = runner.CallInfo.from_call(
+            lambda: pytest.skip(six.text_type(call.excinfo.value)), call.when
+        )
+        call.excinfo = call2.excinfo
+
+
+@hookimpl(trylast=True)
+def pytest_runtest_setup(item):
+    if is_potential_nosetest(item):
+        if not call_optional(item.obj, "setup"):
+            # call module level setup if there is no object level one
+            call_optional(item.parent.obj, "setup")
+        # XXX this implies we only call teardown when setup worked
+        item.session._setupstate.addfinalizer((lambda: teardown_nose(item)), item)
+
+
+def teardown_nose(item):
+    if is_potential_nosetest(item):
+        if not call_optional(item.obj, "teardown"):
+            call_optional(item.parent.obj, "teardown")
+        # if hasattr(item.parent, '_nosegensetup'):
+        #    #call_optional(item._nosegensetup, 'teardown')
+        #    del item.parent._nosegensetup
+
+
+def is_potential_nosetest(item):
+    # extra check needed since we do not do nose style setup/teardown
+    # on direct unittest style classes
+    return isinstance(item, python.Function) and not isinstance(
+        item, unittest.TestCaseFunction
+    )
+
+
+def call_optional(obj, name):
+    method = getattr(obj, name, None)
+    isfixture = hasattr(method, "_pytestfixturefunction")
+    if method is not None and not isfixture and callable(method):
+        # If there's any problems allow the exception to raise rather than
+        # silently ignoring them
+        method()
+        return True
diff --git a/contrib/python/pytest/py2/_pytest/outcomes.py b/contrib/python/pytest/py2/_pytest/outcomes.py
new file mode 100644
index 0000000000..4620f957c7
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/outcomes.py
@@ -0,0 +1,187 @@
+# -*- coding: utf-8 -*-
+"""
+exception classes and constants handling test outcomes
+as well as functions creating them
+"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import sys
+
+from packaging.version import Version
+
+
+class OutcomeException(BaseException):
+    """ OutcomeException and its subclass instances indicate and
+        contain info about test and collection outcomes.
+    """
+
+    def __init__(self, msg=None, pytrace=True):
+        BaseException.__init__(self, msg)
+        self.msg = msg
+        self.pytrace = pytrace
+
+    def __repr__(self):
+        if self.msg:
+            val = self.msg
+            if isinstance(val, bytes):
+                val = val.decode("UTF-8", errors="replace")
+            return val
+        return "<%s instance>" % (self.__class__.__name__,)
+
+    __str__ = __repr__
+
+
+TEST_OUTCOME = (OutcomeException, Exception)
+
+
+class Skipped(OutcomeException):
+    # XXX hackish: on 3k we fake to live in the builtins
+    # in order to have Skipped exception printing shorter/nicer
+    __module__ = "builtins"
+
+    def __init__(self, msg=None, pytrace=True, allow_module_level=False):
+        OutcomeException.__init__(self, msg=msg, pytrace=pytrace)
+        self.allow_module_level = allow_module_level
+
+
+class Failed(OutcomeException):
+    """ raised from an explicit call to pytest.fail() """
+
+    __module__ = "builtins"
+
+
+class Exit(Exception):
+    """ raised for immediate program exits (no tracebacks/summaries)"""
+
+    def __init__(self, msg="unknown reason", returncode=None):
+        self.msg = msg
+        self.returncode = returncode
+        super(Exit, self).__init__(msg)
+
+
+# exposed helper methods
+
+
+def exit(msg, returncode=None):
+    """
+    Exit testing process.
+
+    :param str msg: message to display upon exit.
+    :param int returncode: return code to be used when exiting pytest.
+    """
+    __tracebackhide__ = True
+    raise Exit(msg, returncode)
+
+
+exit.Exception = Exit
+
+
+def skip(msg="", **kwargs):
+    """
+    Skip an executing test with the given message.
+
+    This function should be called only during testing (setup, call or teardown) or
+    during collection by using the ``allow_module_level`` flag.  This function can
+    be called in doctests as well.
+
+    :kwarg bool allow_module_level: allows this function to be called at
+        module level, skipping the rest of the module. Default to False.
+
+    .. note::
+        It is better to use the :ref:`pytest.mark.skipif ref` marker when possible to declare a test to be
+        skipped under certain conditions like mismatching platforms or
+        dependencies.
+        Similarly, use the ``# doctest: +SKIP`` directive (see `doctest.SKIP
+        <https://docs.python.org/3/library/doctest.html#doctest.SKIP>`_)
+        to skip a doctest statically.
+    """
+    __tracebackhide__ = True
+    allow_module_level = kwargs.pop("allow_module_level", False)
+    if kwargs:
+        raise TypeError("unexpected keyword arguments: {}".format(sorted(kwargs)))
+    raise Skipped(msg=msg, allow_module_level=allow_module_level)
+
+
+skip.Exception = Skipped
+
+
+def fail(msg="", pytrace=True):
+    """
+    Explicitly fail an executing test with the given message.
+
+    :param str msg: the message to show the user as reason for the failure.
+    :param bool pytrace: if false the msg represents the full failure information and no
+        python traceback will be reported.
+    """
+    __tracebackhide__ = True
+    raise Failed(msg=msg, pytrace=pytrace)
+
+
+fail.Exception = Failed
+
+
+class XFailed(fail.Exception):
+    """ raised from an explicit call to pytest.xfail() """
+
+
+def xfail(reason=""):
+    """
+    Imperatively xfail an executing test or setup functions with the given reason.
+
+    This function should be called only during testing (setup, call or teardown).
+
+    .. note::
+        It is better to use the :ref:`pytest.mark.xfail ref` marker when possible to declare a test to be
+        xfailed under certain conditions like known bugs or missing features.
+    """
+    __tracebackhide__ = True
+    raise XFailed(reason)
+
+
+xfail.Exception = XFailed
+
+
+def importorskip(modname, minversion=None, reason=None):
+    """Imports and returns the requested module ``modname``, or skip the current test
+    if the module cannot be imported.
+
+    :param str modname: the name of the module to import
+    :param str minversion: if given, the imported module ``__version__`` attribute must be
+        at least this minimal version, otherwise the test is still skipped.
+    :param str reason: if given, this reason is shown as the message when the module
+        cannot be imported.
+    """
+    import warnings
+
+    __tracebackhide__ = True
+    compile(modname, "", "eval")  # to catch syntaxerrors
+    import_exc = None
+
+    with warnings.catch_warnings():
+        # make sure to ignore ImportWarnings that might happen because
+        # of existing directories with the same name we're trying to
+        # import but without a __init__.py file
+        warnings.simplefilter("ignore")
+        try:
+            __import__(modname)
+        except ImportError as exc:
+            # Do not raise chained exception here(#1485)
+            import_exc = exc
+    if import_exc:
+        if reason is None:
+            reason = "could not import %r: %s" % (modname, import_exc)
+        raise Skipped(reason, allow_module_level=True)
+    mod = sys.modules[modname]
+    if minversion is None:
+        return mod
+    verattr = getattr(mod, "__version__", None)
+    if minversion is not None:
+        if verattr is None or Version(verattr) < Version(minversion):
+            raise Skipped(
+                "module %r has __version__ %r, required is: %r"
+                % (modname, verattr, minversion),
+                allow_module_level=True,
+            )
+    return mod
diff --git a/contrib/python/pytest/py2/_pytest/pastebin.py b/contrib/python/pytest/py2/_pytest/pastebin.py
new file mode 100644
index 0000000000..7a3e80231c
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/pastebin.py
@@ -0,0 +1,110 @@
+# -*- coding: utf-8 -*-
+""" submit failure or test session information to a pastebin service. """
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import sys
+import tempfile
+
+import six
+
+import pytest
+
+
+def pytest_addoption(parser):
+    group = parser.getgroup("terminal reporting")
+    group._addoption(
+        "--pastebin",
+        metavar="mode",
+        action="store",
+        dest="pastebin",
+        default=None,
+        choices=["failed", "all"],
+        help="send failed|all info to bpaste.net pastebin service.",
+    )
+
+
+@pytest.hookimpl(trylast=True)
+def pytest_configure(config):
+    if config.option.pastebin == "all":
+        tr = config.pluginmanager.getplugin("terminalreporter")
+        # if no terminal reporter plugin is present, nothing we can do here;
+        # this can happen when this function executes in a slave node
+        # when using pytest-xdist, for example
+        if tr is not None:
+            # pastebin file will be utf-8 encoded binary file
+            config._pastebinfile = tempfile.TemporaryFile("w+b")
+            oldwrite = tr._tw.write
+
+            def tee_write(s, **kwargs):
+                oldwrite(s, **kwargs)
+                if isinstance(s, six.text_type):
+                    s = s.encode("utf-8")
+                config._pastebinfile.write(s)
+
+            tr._tw.write = tee_write
+
+
+def pytest_unconfigure(config):
+    if hasattr(config, "_pastebinfile"):
+        # get terminal contents and delete file
+        config._pastebinfile.seek(0)
+        sessionlog = config._pastebinfile.read()
+        config._pastebinfile.close()
+        del config._pastebinfile
+        # undo our patching in the terminal reporter
+        tr = config.pluginmanager.getplugin("terminalreporter")
+        del tr._tw.__dict__["write"]
+        # write summary
+        tr.write_sep("=", "Sending information to Paste Service")
+        pastebinurl = create_new_paste(sessionlog)
+        tr.write_line("pastebin session-log: %s\n" % pastebinurl)
+
+
+def create_new_paste(contents):
+    """
+    Creates a new paste using bpaste.net service.
+
+    :contents: paste contents as utf-8 encoded bytes
+    :returns: url to the pasted contents
+    """
+    import re
+
+    if sys.version_info < (3, 0):
+        from urllib import urlopen, urlencode
+    else:
+        from urllib.request import urlopen
+        from urllib.parse import urlencode
+
+    params = {"code": contents, "lexer": "text", "expiry": "1week"}
+    url = "https://bpaste.net"
+    response = urlopen(url, data=urlencode(params).encode("ascii")).read()
+    m = re.search(r'href="/raw/(\w+)"', response.decode("utf-8"))
+    if m:
+        return "%s/show/%s" % (url, m.group(1))
+    else:
+        return "bad response: " + response
+
+
+def pytest_terminal_summary(terminalreporter):
+    import _pytest.config
+
+    if terminalreporter.config.option.pastebin != "failed":
+        return
+    tr = terminalreporter
+    if "failed" in tr.stats:
+        terminalreporter.write_sep("=", "Sending information to Paste Service")
+        for rep in terminalreporter.stats.get("failed"):
+            try:
+                msg = rep.longrepr.reprtraceback.reprentries[-1].reprfileloc
+            except AttributeError:
+                msg = tr._getfailureheadline(rep)
+            tw = _pytest.config.create_terminal_writer(
+                terminalreporter.config, stringio=True
+            )
+            rep.toterminal(tw)
+            s = tw.stringio.getvalue()
+            assert len(s)
+            pastebinurl = create_new_paste(s)
+            tr.write_line("%s --> %s" % (msg, pastebinurl))
diff --git a/contrib/python/pytest/py2/_pytest/pathlib.py b/contrib/python/pytest/py2/_pytest/pathlib.py
new file mode 100644
index 0000000000..42071f4310
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/pathlib.py
@@ -0,0 +1,380 @@
+# -*- coding: utf-8 -*-
+from __future__ import absolute_import
+
+import atexit
+import errno
+import fnmatch
+import itertools
+import operator
+import os
+import shutil
+import sys
+import uuid
+import warnings
+from functools import partial
+from functools import reduce
+from os.path import expanduser
+from os.path import expandvars
+from os.path import isabs
+from os.path import sep
+from posixpath import sep as posix_sep
+
+import six
+from six.moves import map
+
+from .compat import PY36
+from _pytest.warning_types import PytestWarning
+
+if PY36:
+    from pathlib import Path, PurePath
+else:
+    from pathlib2 import Path, PurePath
+
+__all__ = ["Path", "PurePath"]
+
+
+LOCK_TIMEOUT = 60 * 60 * 3
+
+get_lock_path = operator.methodcaller("joinpath", ".lock")
+
+
+def ensure_reset_dir(path):
+    """
+    ensures the given path is an empty directory
+    """
+    if path.exists():
+        rm_rf(path)
+    path.mkdir()
+
+
+def on_rm_rf_error(func, path, exc, **kwargs):
+    """Handles known read-only errors during rmtree.
+
+    The returned value is used only by our own tests.
+    """
+    start_path = kwargs["start_path"]
+    exctype, excvalue = exc[:2]
+
+    # another process removed the file in the middle of the "rm_rf" (xdist for example)
+    # more context: https://github.com/pytest-dev/pytest/issues/5974#issuecomment-543799018
+    if isinstance(excvalue, OSError) and excvalue.errno == errno.ENOENT:
+        return False
+
+    if not isinstance(excvalue, OSError) or excvalue.errno not in (
+        errno.EACCES,
+        errno.EPERM,
+    ):
+        warnings.warn(
+            PytestWarning(
+                "(rm_rf) error removing {}\n{}: {}".format(path, exctype, excvalue)
+            )
+        )
+        return False
+
+    if func not in (os.rmdir, os.remove, os.unlink):
+        warnings.warn(
+            PytestWarning(
+                "(rm_rf) unknown function {} when removing {}:\n{}: {}".format(
+                    path, func, exctype, excvalue
+                )
+            )
+        )
+        return False
+
+    # Chmod + retry.
+    import stat
+
+    def chmod_rw(p):
+        mode = os.stat(p).st_mode
+        os.chmod(p, mode | stat.S_IRUSR | stat.S_IWUSR)
+
+    # For files, we need to recursively go upwards in the directories to
+    # ensure they all are also writable.
+    p = Path(path)
+    if p.is_file():
+        for parent in p.parents:
+            chmod_rw(str(parent))
+            # stop when we reach the original path passed to rm_rf
+            if parent == start_path:
+                break
+    chmod_rw(str(path))
+
+    func(path)
+    return True
+
+
+def rm_rf(path):
+    """Remove the path contents recursively, even if some elements
+    are read-only.
+    """
+    onerror = partial(on_rm_rf_error, start_path=path)
+    shutil.rmtree(str(path), onerror=onerror)
+
+
+def find_prefixed(root, prefix):
+    """finds all elements in root that begin with the prefix, case insensitive"""
+    l_prefix = prefix.lower()
+    for x in root.iterdir():
+        if x.name.lower().startswith(l_prefix):
+            yield x
+
+
+def extract_suffixes(iter, prefix):
+    """
+    :param iter: iterator over path names
+    :param prefix: expected prefix of the path names
+    :returns: the parts of the paths following the prefix
+    """
+    p_len = len(prefix)
+    for p in iter:
+        yield p.name[p_len:]
+
+
+def find_suffixes(root, prefix):
+    """combines find_prefixes and extract_suffixes
+    """
+    return extract_suffixes(find_prefixed(root, prefix), prefix)
+
+
+def parse_num(maybe_num):
+    """parses number path suffixes, returns -1 on error"""
+    try:
+        return int(maybe_num)
+    except ValueError:
+        return -1
+
+
+if six.PY2:
+
+    def _max(iterable, default):
+        """needed due to python2.7 lacking the default argument for max"""
+        return reduce(max, iterable, default)
+
+
+else:
+    _max = max
+
+
+def _force_symlink(root, target, link_to):
+    """helper to create the current symlink
+
+    it's full of race conditions that are reasonably ok to ignore
+    for the context of best effort linking to the latest testrun
+
+    the presumption being thatin case of much parallelism
+    the inaccuracy is going to be acceptable
+    """
+    current_symlink = root.joinpath(target)
+    try:
+        current_symlink.unlink()
+    except OSError:
+        pass
+    try:
+        current_symlink.symlink_to(link_to)
+    except Exception:
+        pass
+
+
+def make_numbered_dir(root, prefix):
+    """create a directory with an increased number as suffix for the given prefix"""
+    for i in range(10):
+        # try up to 10 times to create the folder
+        max_existing = _max(map(parse_num, find_suffixes(root, prefix)), default=-1)
+        new_number = max_existing + 1
+        new_path = root.joinpath("{}{}".format(prefix, new_number))
+        try:
+            new_path.mkdir()
+        except Exception:
+            pass
+        else:
+            _force_symlink(root, prefix + "current", new_path)
+            return new_path
+    else:
+        raise EnvironmentError(
+            "could not create numbered dir with prefix "
+            "{prefix} in {root} after 10 tries".format(prefix=prefix, root=root)
+        )
+
+
+def create_cleanup_lock(p):
+    """crates a lock to prevent premature folder cleanup"""
+    lock_path = get_lock_path(p)
+    try:
+        fd = os.open(str(lock_path), os.O_WRONLY | os.O_CREAT | os.O_EXCL, 0o644)
+    except OSError as e:
+        if e.errno == errno.EEXIST:
+            six.raise_from(
+                EnvironmentError("cannot create lockfile in {path}".format(path=p)), e
+            )
+        else:
+            raise
+    else:
+        pid = os.getpid()
+        spid = str(pid)
+        if not isinstance(spid, bytes):
+            spid = spid.encode("ascii")
+        os.write(fd, spid)
+        os.close(fd)
+        if not lock_path.is_file():
+            raise EnvironmentError("lock path got renamed after successful creation")
+        return lock_path
+
+
+def register_cleanup_lock_removal(lock_path, register=atexit.register):
+    """registers a cleanup function for removing a lock, by default on atexit"""
+    pid = os.getpid()
+
+    def cleanup_on_exit(lock_path=lock_path, original_pid=pid):
+        current_pid = os.getpid()
+        if current_pid != original_pid:
+            # fork
+            return
+        try:
+            lock_path.unlink()
+        except (OSError, IOError):
+            pass
+
+    return register(cleanup_on_exit)
+
+
+def maybe_delete_a_numbered_dir(path):
+    """removes a numbered directory if its lock can be obtained and it does not seem to be in use"""
+    lock_path = None
+    try:
+        lock_path = create_cleanup_lock(path)
+        parent = path.parent
+
+        garbage = parent.joinpath("garbage-{}".format(uuid.uuid4()))
+        path.rename(garbage)
+        rm_rf(garbage)
+    except (OSError, EnvironmentError):
+        #  known races:
+        #  * other process did a cleanup at the same time
+        #  * deletable folder was found
+        #  * process cwd (Windows)
+        return
+    finally:
+        # if we created the lock, ensure we remove it even if we failed
+        # to properly remove the numbered dir
+        if lock_path is not None:
+            try:
+                lock_path.unlink()
+            except (OSError, IOError):
+                pass
+
+
+def ensure_deletable(path, consider_lock_dead_if_created_before):
+    """checks if a lock exists and breaks it if its considered dead"""
+    if path.is_symlink():
+        return False
+    lock = get_lock_path(path)
+    if not lock.exists():
+        return True
+    try:
+        lock_time = lock.stat().st_mtime
+    except Exception:
+        return False
+    else:
+        if lock_time < consider_lock_dead_if_created_before:
+            lock.unlink()
+            return True
+        else:
+            return False
+
+
+def try_cleanup(path, consider_lock_dead_if_created_before):
+    """tries to cleanup a folder if we can ensure it's deletable"""
+    if ensure_deletable(path, consider_lock_dead_if_created_before):
+        maybe_delete_a_numbered_dir(path)
+
+
+def cleanup_candidates(root, prefix, keep):
+    """lists candidates for numbered directories to be removed - follows py.path"""
+    max_existing = _max(map(parse_num, find_suffixes(root, prefix)), default=-1)
+    max_delete = max_existing - keep
+    paths = find_prefixed(root, prefix)
+    paths, paths2 = itertools.tee(paths)
+    numbers = map(parse_num, extract_suffixes(paths2, prefix))
+    for path, number in zip(paths, numbers):
+        if number <= max_delete:
+            yield path
+
+
+def cleanup_numbered_dir(root, prefix, keep, consider_lock_dead_if_created_before):
+    """cleanup for lock driven numbered directories"""
+    for path in cleanup_candidates(root, prefix, keep):
+        try_cleanup(path, consider_lock_dead_if_created_before)
+    for path in root.glob("garbage-*"):
+        try_cleanup(path, consider_lock_dead_if_created_before)
+
+
+def make_numbered_dir_with_cleanup(root, prefix, keep, lock_timeout):
+    """creates a numbered dir with a cleanup lock and removes old ones"""
+    e = None
+    for i in range(10):
+        try:
+            p = make_numbered_dir(root, prefix)
+            lock_path = create_cleanup_lock(p)
+            register_cleanup_lock_removal(lock_path)
+        except Exception as exc:
+            e = exc
+        else:
+            consider_lock_dead_if_created_before = p.stat().st_mtime - lock_timeout
+            cleanup_numbered_dir(
+                root=root,
+                prefix=prefix,
+                keep=keep,
+                consider_lock_dead_if_created_before=consider_lock_dead_if_created_before,
+            )
+            return p
+    assert e is not None
+    raise e
+
+
+def resolve_from_str(input, root):
+    assert not isinstance(input, Path), "would break on py2"
+    root = Path(root)
+    input = expanduser(input)
+    input = expandvars(input)
+    if isabs(input):
+        return Path(input)
+    else:
+        return root.joinpath(input)
+
+
+def fnmatch_ex(pattern, path):
+    """FNMatcher port from py.path.common which works with PurePath() instances.
+
+    The difference between this algorithm and PurePath.match() is that the latter matches "**" glob expressions
+    for each part of the path, while this algorithm uses the whole path instead.
+
+    For example:
+        "tests/foo/bar/doc/test_foo.py" matches pattern "tests/**/doc/test*.py" with this algorithm, but not with
+        PurePath.match().
+
+    This algorithm was ported to keep backward-compatibility with existing settings which assume paths match according
+    this logic.
+
+    References:
+    * https://bugs.python.org/issue29249
+    * https://bugs.python.org/issue34731
+    """
+    path = PurePath(path)
+    iswin32 = sys.platform.startswith("win")
+
+    if iswin32 and sep not in pattern and posix_sep in pattern:
+        # Running on Windows, the pattern has no Windows path separators,
+        # and the pattern has one or more Posix path separators. Replace
+        # the Posix path separators with the Windows path separator.
+        pattern = pattern.replace(posix_sep, sep)
+
+    if sep not in pattern:
+        name = path.name
+    else:
+        name = six.text_type(path)
+    return fnmatch.fnmatch(name, pattern)
+
+
+def parts(s):
+    parts = s.split(sep)
+    return {sep.join(parts[: i + 1]) or sep for i in range(len(parts))}
diff --git a/contrib/python/pytest/py2/_pytest/pytester.py b/contrib/python/pytest/py2/_pytest/pytester.py
new file mode 100644
index 0000000000..f1d739c991
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/pytester.py
@@ -0,0 +1,1413 @@
+# -*- coding: utf-8 -*-
+"""(disabled by default) support for testing pytest and pytest plugins."""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import codecs
+import gc
+import os
+import platform
+import re
+import subprocess
+import sys
+import time
+import traceback
+from fnmatch import fnmatch
+from weakref import WeakKeyDictionary
+
+import py
+import six
+
+import pytest
+from _pytest._code import Source
+from _pytest._io.saferepr import saferepr
+from _pytest.assertion.rewrite import AssertionRewritingHook
+from _pytest.capture import MultiCapture
+from _pytest.capture import SysCapture
+from _pytest.compat import safe_str
+from _pytest.compat import Sequence
+from _pytest.main import EXIT_INTERRUPTED
+from _pytest.main import EXIT_OK
+from _pytest.main import Session
+from _pytest.monkeypatch import MonkeyPatch
+from _pytest.pathlib import Path
+
+IGNORE_PAM = [  # filenames added when obtaining details about the current user
+    u"/var/lib/sss/mc/passwd"
+]
+
+
+def pytest_addoption(parser):
+    parser.addoption(
+        "--lsof",
+        action="store_true",
+        dest="lsof",
+        default=False,
+        help="run FD checks if lsof is available",
+    )
+
+    parser.addoption(
+        "--runpytest",
+        default="inprocess",
+        dest="runpytest",
+        choices=("inprocess", "subprocess"),
+        help=(
+            "run pytest sub runs in tests using an 'inprocess' "
+            "or 'subprocess' (python -m main) method"
+        ),
+    )
+
+    parser.addini(
+        "pytester_example_dir", help="directory to take the pytester example files from"
+    )
+
+
+def pytest_configure(config):
+    if config.getvalue("lsof"):
+        checker = LsofFdLeakChecker()
+        if checker.matching_platform():
+            config.pluginmanager.register(checker)
+
+    config.addinivalue_line(
+        "markers",
+        "pytester_example_path(*path_segments): join the given path "
+        "segments to `pytester_example_dir` for this test.",
+    )
+
+
+def raise_on_kwargs(kwargs):
+    __tracebackhide__ = True
+    if kwargs:  # pragma: no branch
+        raise TypeError(
+            "Unexpected keyword arguments: {}".format(", ".join(sorted(kwargs)))
+        )
+
+
+class LsofFdLeakChecker(object):
+    def get_open_files(self):
+        out = self._exec_lsof()
+        open_files = self._parse_lsof_output(out)
+        return open_files
+
+    def _exec_lsof(self):
+        pid = os.getpid()
+        # py3: use subprocess.DEVNULL directly.
+        with open(os.devnull, "wb") as devnull:
+            return subprocess.check_output(
+                ("lsof", "-Ffn0", "-p", str(pid)), stderr=devnull
+            ).decode()
+
+    def _parse_lsof_output(self, out):
+        def isopen(line):
+            return line.startswith("f") and (
+                "deleted" not in line
+                and "mem" not in line
+                and "txt" not in line
+                and "cwd" not in line
+            )
+
+        open_files = []
+
+        for line in out.split("\n"):
+            if isopen(line):
+                fields = line.split("\0")
+                fd = fields[0][1:]
+                filename = fields[1][1:]
+                if filename in IGNORE_PAM:
+                    continue
+                if filename.startswith("/"):
+                    open_files.append((fd, filename))
+
+        return open_files
+
+    def matching_platform(self):
+        try:
+            subprocess.check_output(("lsof", "-v"))
+        except (OSError, subprocess.CalledProcessError):
+            return False
+        else:
+            return True
+
+    @pytest.hookimpl(hookwrapper=True, tryfirst=True)
+    def pytest_runtest_protocol(self, item):
+        lines1 = self.get_open_files()
+        yield
+        if hasattr(sys, "pypy_version_info"):
+            gc.collect()
+        lines2 = self.get_open_files()
+
+        new_fds = {t[0] for t in lines2} - {t[0] for t in lines1}
+        leaked_files = [t for t in lines2 if t[0] in new_fds]
+        if leaked_files:
+            error = []
+            error.append("***** %s FD leakage detected" % len(leaked_files))
+            error.extend([str(f) for f in leaked_files])
+            error.append("*** Before:")
+            error.extend([str(f) for f in lines1])
+            error.append("*** After:")
+            error.extend([str(f) for f in lines2])
+            error.append(error[0])
+            error.append("*** function %s:%s: %s " % item.location)
+            error.append("See issue #2366")
+            item.warn(pytest.PytestWarning("\n".join(error)))
+
+
+# used at least by pytest-xdist plugin
+
+
+@pytest.fixture
+def _pytest(request):
+    """Return a helper which offers a gethookrecorder(hook) method which
+    returns a HookRecorder instance which helps to make assertions about called
+    hooks.
+
+    """
+    return PytestArg(request)
+
+
+class PytestArg(object):
+    def __init__(self, request):
+        self.request = request
+
+    def gethookrecorder(self, hook):
+        hookrecorder = HookRecorder(hook._pm)
+        self.request.addfinalizer(hookrecorder.finish_recording)
+        return hookrecorder
+
+
+def get_public_names(values):
+    """Only return names from iterator values without a leading underscore."""
+    return [x for x in values if x[0] != "_"]
+
+
+class ParsedCall(object):
+    def __init__(self, name, kwargs):
+        self.__dict__.update(kwargs)
+        self._name = name
+
+    def __repr__(self):
+        d = self.__dict__.copy()
+        del d["_name"]
+        return "<ParsedCall %r(**%r)>" % (self._name, d)
+
+
+class HookRecorder(object):
+    """Record all hooks called in a plugin manager.
+
+    This wraps all the hook calls in the plugin manager, recording each call
+    before propagating the normal calls.
+
+    """
+
+    def __init__(self, pluginmanager):
+        self._pluginmanager = pluginmanager
+        self.calls = []
+
+        def before(hook_name, hook_impls, kwargs):
+            self.calls.append(ParsedCall(hook_name, kwargs))
+
+        def after(outcome, hook_name, hook_impls, kwargs):
+            pass
+
+        self._undo_wrapping = pluginmanager.add_hookcall_monitoring(before, after)
+
+    def finish_recording(self):
+        self._undo_wrapping()
+
+    def getcalls(self, names):
+        if isinstance(names, str):
+            names = names.split()
+        return [call for call in self.calls if call._name in names]
+
+    def assert_contains(self, entries):
+        __tracebackhide__ = True
+        i = 0
+        entries = list(entries)
+        backlocals = sys._getframe(1).f_locals
+        while entries:
+            name, check = entries.pop(0)
+            for ind, call in enumerate(self.calls[i:]):
+                if call._name == name:
+                    print("NAMEMATCH", name, call)
+                    if eval(check, backlocals, call.__dict__):
+                        print("CHECKERMATCH", repr(check), "->", call)
+                    else:
+                        print("NOCHECKERMATCH", repr(check), "-", call)
+                        continue
+                    i += ind + 1
+                    break
+                print("NONAMEMATCH", name, "with", call)
+            else:
+                pytest.fail("could not find %r check %r" % (name, check))
+
+    def popcall(self, name):
+        __tracebackhide__ = True
+        for i, call in enumerate(self.calls):
+            if call._name == name:
+                del self.calls[i]
+                return call
+        lines = ["could not find call %r, in:" % (name,)]
+        lines.extend(["  %s" % x for x in self.calls])
+        pytest.fail("\n".join(lines))
+
+    def getcall(self, name):
+        values = self.getcalls(name)
+        assert len(values) == 1, (name, values)
+        return values[0]
+
+    # functionality for test reports
+
+    def getreports(self, names="pytest_runtest_logreport pytest_collectreport"):
+        return [x.report for x in self.getcalls(names)]
+
+    def matchreport(
+        self,
+        inamepart="",
+        names="pytest_runtest_logreport pytest_collectreport",
+        when=None,
+    ):
+        """return a testreport whose dotted import path matches"""
+        values = []
+        for rep in self.getreports(names=names):
+            if not when and rep.when != "call" and rep.passed:
+                # setup/teardown passing reports - let's ignore those
+                continue
+            if when and rep.when != when:
+                continue
+            if not inamepart or inamepart in rep.nodeid.split("::"):
+                values.append(rep)
+        if not values:
+            raise ValueError(
+                "could not find test report matching %r: "
+                "no test reports at all!" % (inamepart,)
+            )
+        if len(values) > 1:
+            raise ValueError(
+                "found 2 or more testreports matching %r: %s" % (inamepart, values)
+            )
+        return values[0]
+
+    def getfailures(self, names="pytest_runtest_logreport pytest_collectreport"):
+        return [rep for rep in self.getreports(names) if rep.failed]
+
+    def getfailedcollections(self):
+        return self.getfailures("pytest_collectreport")
+
+    def listoutcomes(self):
+        passed = []
+        skipped = []
+        failed = []
+        for rep in self.getreports("pytest_collectreport pytest_runtest_logreport"):
+            if rep.passed:
+                if rep.when == "call":
+                    passed.append(rep)
+            elif rep.skipped:
+                skipped.append(rep)
+            else:
+                assert rep.failed, "Unexpected outcome: {!r}".format(rep)
+                failed.append(rep)
+        return passed, skipped, failed
+
+    def countoutcomes(self):
+        return [len(x) for x in self.listoutcomes()]
+
+    def assertoutcome(self, passed=0, skipped=0, failed=0):
+        realpassed, realskipped, realfailed = self.listoutcomes()
+        assert passed == len(realpassed)
+        assert skipped == len(realskipped)
+        assert failed == len(realfailed)
+
+    def clear(self):
+        self.calls[:] = []
+
+
+@pytest.fixture
+def linecomp(request):
+    return LineComp()
+
+
+@pytest.fixture(name="LineMatcher")
+def LineMatcher_fixture(request):
+    return LineMatcher
+
+
+@pytest.fixture
+def testdir(request, tmpdir_factory):
+    return Testdir(request, tmpdir_factory)
+
+
+@pytest.fixture
+def _sys_snapshot():
+    snappaths = SysPathsSnapshot()
+    snapmods = SysModulesSnapshot()
+    yield
+    snapmods.restore()
+    snappaths.restore()
+
+
+@pytest.fixture
+def _config_for_test():
+    from _pytest.config import get_config
+
+    config = get_config()
+    yield config
+    config._ensure_unconfigure()  # cleanup, e.g. capman closing tmpfiles.
+
+
+rex_outcome = re.compile(r"(\d+) ([\w-]+)")
+
+
+class RunResult(object):
+    """The result of running a command.
+
+    Attributes:
+
+    :ret: the return value
+    :outlines: list of lines captured from stdout
+    :errlines: list of lines captures from stderr
+    :stdout: :py:class:`LineMatcher` of stdout, use ``stdout.str()`` to
+       reconstruct stdout or the commonly used ``stdout.fnmatch_lines()``
+       method
+    :stderr: :py:class:`LineMatcher` of stderr
+    :duration: duration in seconds
+
+    """
+
+    def __init__(self, ret, outlines, errlines, duration):
+        self.ret = ret
+        self.outlines = outlines
+        self.errlines = errlines
+        self.stdout = LineMatcher(outlines)
+        self.stderr = LineMatcher(errlines)
+        self.duration = duration
+
+    def __repr__(self):
+        return (
+            "<RunResult ret=%r len(stdout.lines)=%d len(stderr.lines)=%d duration=%.2fs>"
+            % (self.ret, len(self.stdout.lines), len(self.stderr.lines), self.duration)
+        )
+
+    def parseoutcomes(self):
+        """Return a dictionary of outcomestring->num from parsing the terminal
+        output that the test process produced.
+
+        """
+        for line in reversed(self.outlines):
+            if "seconds" in line:
+                outcomes = rex_outcome.findall(line)
+                if outcomes:
+                    d = {}
+                    for num, cat in outcomes:
+                        d[cat] = int(num)
+                    return d
+        raise ValueError("Pytest terminal report not found")
+
+    def assert_outcomes(
+        self, passed=0, skipped=0, failed=0, error=0, xpassed=0, xfailed=0
+    ):
+        """Assert that the specified outcomes appear with the respective
+        numbers (0 means it didn't occur) in the text output from a test run.
+
+        """
+        d = self.parseoutcomes()
+        obtained = {
+            "passed": d.get("passed", 0),
+            "skipped": d.get("skipped", 0),
+            "failed": d.get("failed", 0),
+            "error": d.get("error", 0),
+            "xpassed": d.get("xpassed", 0),
+            "xfailed": d.get("xfailed", 0),
+        }
+        expected = {
+            "passed": passed,
+            "skipped": skipped,
+            "failed": failed,
+            "error": error,
+            "xpassed": xpassed,
+            "xfailed": xfailed,
+        }
+        assert obtained == expected
+
+
+class CwdSnapshot(object):
+    def __init__(self):
+        self.__saved = os.getcwd()
+
+    def restore(self):
+        os.chdir(self.__saved)
+
+
+class SysModulesSnapshot(object):
+    def __init__(self, preserve=None):
+        self.__preserve = preserve
+        self.__saved = dict(sys.modules)
+
+    def restore(self):
+        if self.__preserve:
+            self.__saved.update(
+                (k, m) for k, m in sys.modules.items() if self.__preserve(k)
+            )
+        sys.modules.clear()
+        sys.modules.update(self.__saved)
+
+
+class SysPathsSnapshot(object):
+    def __init__(self):
+        self.__saved = list(sys.path), list(sys.meta_path)
+
+    def restore(self):
+        sys.path[:], sys.meta_path[:] = self.__saved
+
+
+class Testdir(object):
+    """Temporary test directory with tools to test/run pytest itself.
+
+    This is based on the ``tmpdir`` fixture but provides a number of methods
+    which aid with testing pytest itself.  Unless :py:meth:`chdir` is used all
+    methods will use :py:attr:`tmpdir` as their current working directory.
+
+    Attributes:
+
+    :tmpdir: The :py:class:`py.path.local` instance of the temporary directory.
+
+    :plugins: A list of plugins to use with :py:meth:`parseconfig` and
+       :py:meth:`runpytest`.  Initially this is an empty list but plugins can
+       be added to the list.  The type of items to add to the list depends on
+       the method using them so refer to them for details.
+
+    """
+
+    CLOSE_STDIN = object
+
+    class TimeoutExpired(Exception):
+        pass
+
+    def __init__(self, request, tmpdir_factory):
+        self.request = request
+        self._mod_collections = WeakKeyDictionary()
+        name = request.function.__name__
+        self.tmpdir = tmpdir_factory.mktemp(name, numbered=True)
+        self.test_tmproot = tmpdir_factory.mktemp("tmp-" + name, numbered=True)
+        self.plugins = []
+        self._cwd_snapshot = CwdSnapshot()
+        self._sys_path_snapshot = SysPathsSnapshot()
+        self._sys_modules_snapshot = self.__take_sys_modules_snapshot()
+        self.chdir()
+        self.request.addfinalizer(self.finalize)
+        method = self.request.config.getoption("--runpytest")
+        if method == "inprocess":
+            self._runpytest_method = self.runpytest_inprocess
+        elif method == "subprocess":
+            self._runpytest_method = self.runpytest_subprocess
+
+        mp = self.monkeypatch = MonkeyPatch()
+        mp.setenv("PYTEST_DEBUG_TEMPROOT", str(self.test_tmproot))
+        # Ensure no unexpected caching via tox.
+        mp.delenv("TOX_ENV_DIR", raising=False)
+        # Discard outer pytest options.
+        mp.delenv("PYTEST_ADDOPTS", raising=False)
+
+        # Environment (updates) for inner runs.
+        tmphome = str(self.tmpdir)
+        self._env_run_update = {"HOME": tmphome, "USERPROFILE": tmphome}
+
+    def __repr__(self):
+        return "<Testdir %r>" % (self.tmpdir,)
+
+    def __str__(self):
+        return str(self.tmpdir)
+
+    def finalize(self):
+        """Clean up global state artifacts.
+
+        Some methods modify the global interpreter state and this tries to
+        clean this up.  It does not remove the temporary directory however so
+        it can be looked at after the test run has finished.
+
+        """
+        self._sys_modules_snapshot.restore()
+        self._sys_path_snapshot.restore()
+        self._cwd_snapshot.restore()
+        self.monkeypatch.undo()
+
+    def __take_sys_modules_snapshot(self):
+        # some zope modules used by twisted-related tests keep internal state
+        # and can't be deleted; we had some trouble in the past with
+        # `zope.interface` for example
+        def preserve_module(name):
+            return name.startswith("zope")
+
+        return SysModulesSnapshot(preserve=preserve_module)
+
+    def make_hook_recorder(self, pluginmanager):
+        """Create a new :py:class:`HookRecorder` for a PluginManager."""
+        pluginmanager.reprec = reprec = HookRecorder(pluginmanager)
+        self.request.addfinalizer(reprec.finish_recording)
+        return reprec
+
+    def chdir(self):
+        """Cd into the temporary directory.
+
+        This is done automatically upon instantiation.
+
+        """
+        self.tmpdir.chdir()
+
+    def _makefile(self, ext, args, kwargs, encoding="utf-8"):
+        items = list(kwargs.items())
+
+        def to_text(s):
+            return s.decode(encoding) if isinstance(s, bytes) else six.text_type(s)
+
+        if args:
+            source = u"\n".join(to_text(x) for x in args)
+            basename = self.request.function.__name__
+            items.insert(0, (basename, source))
+
+        ret = None
+        for basename, value in items:
+            p = self.tmpdir.join(basename).new(ext=ext)
+            p.dirpath().ensure_dir()
+            source = Source(value)
+            source = u"\n".join(to_text(line) for line in source.lines)
+            p.write(source.strip().encode(encoding), "wb")
+            if ret is None:
+                ret = p
+        return ret
+
+    def makefile(self, ext, *args, **kwargs):
+        r"""Create new file(s) in the testdir.
+
+        :param str ext: The extension the file(s) should use, including the dot, e.g. `.py`.
+        :param list[str] args: All args will be treated as strings and joined using newlines.
+           The result will be written as contents to the file.  The name of the
+           file will be based on the test function requesting this fixture.
+        :param kwargs: Each keyword is the name of a file, while the value of it will
+           be written as contents of the file.
+
+        Examples:
+
+        .. code-block:: python
+
+            testdir.makefile(".txt", "line1", "line2")
+
+            testdir.makefile(".ini", pytest="[pytest]\naddopts=-rs\n")
+
+        """
+        return self._makefile(ext, args, kwargs)
+
+    def makeconftest(self, source):
+        """Write a contest.py file with 'source' as contents."""
+        return self.makepyfile(conftest=source)
+
+    def makeini(self, source):
+        """Write a tox.ini file with 'source' as contents."""
+        return self.makefile(".ini", tox=source)
+
+    def getinicfg(self, source):
+        """Return the pytest section from the tox.ini config file."""
+        p = self.makeini(source)
+        return py.iniconfig.IniConfig(p)["pytest"]
+
+    def makepyfile(self, *args, **kwargs):
+        """Shortcut for .makefile() with a .py extension."""
+        return self._makefile(".py", args, kwargs)
+
+    def maketxtfile(self, *args, **kwargs):
+        """Shortcut for .makefile() with a .txt extension."""
+        return self._makefile(".txt", args, kwargs)
+
+    def syspathinsert(self, path=None):
+        """Prepend a directory to sys.path, defaults to :py:attr:`tmpdir`.
+
+        This is undone automatically when this object dies at the end of each
+        test.
+        """
+        if path is None:
+            path = self.tmpdir
+
+        self.monkeypatch.syspath_prepend(str(path))
+
+    def mkdir(self, name):
+        """Create a new (sub)directory."""
+        return self.tmpdir.mkdir(name)
+
+    def mkpydir(self, name):
+        """Create a new python package.
+
+        This creates a (sub)directory with an empty ``__init__.py`` file so it
+        gets recognised as a python package.
+
+        """
+        p = self.mkdir(name)
+        p.ensure("__init__.py")
+        return p
+
+    def copy_example(self, name=None):
+        import warnings
+        from _pytest.warning_types import PYTESTER_COPY_EXAMPLE
+
+        warnings.warn(PYTESTER_COPY_EXAMPLE, stacklevel=2)
+        example_dir = self.request.config.getini("pytester_example_dir")
+        if example_dir is None:
+            raise ValueError("pytester_example_dir is unset, can't copy examples")
+        example_dir = self.request.config.rootdir.join(example_dir)
+
+        for extra_element in self.request.node.iter_markers("pytester_example_path"):
+            assert extra_element.args
+            example_dir = example_dir.join(*extra_element.args)
+
+        if name is None:
+            func_name = self.request.function.__name__
+            maybe_dir = example_dir / func_name
+            maybe_file = example_dir / (func_name + ".py")
+
+            if maybe_dir.isdir():
+                example_path = maybe_dir
+            elif maybe_file.isfile():
+                example_path = maybe_file
+            else:
+                raise LookupError(
+                    "{} cant be found as module or package in {}".format(
+                        func_name, example_dir.bestrelpath(self.request.config.rootdir)
+                    )
+                )
+        else:
+            example_path = example_dir.join(name)
+
+        if example_path.isdir() and not example_path.join("__init__.py").isfile():
+            example_path.copy(self.tmpdir)
+            return self.tmpdir
+        elif example_path.isfile():
+            result = self.tmpdir.join(example_path.basename)
+            example_path.copy(result)
+            return result
+        else:
+            raise LookupError(
+                'example "{}" is not found as a file or directory'.format(example_path)
+            )
+
+    Session = Session
+
+    def getnode(self, config, arg):
+        """Return the collection node of a file.
+
+        :param config: :py:class:`_pytest.config.Config` instance, see
+           :py:meth:`parseconfig` and :py:meth:`parseconfigure` to create the
+           configuration
+
+        :param arg: a :py:class:`py.path.local` instance of the file
+
+        """
+        session = Session(config)
+        assert "::" not in str(arg)
+        p = py.path.local(arg)
+        config.hook.pytest_sessionstart(session=session)
+        res = session.perform_collect([str(p)], genitems=False)[0]
+        config.hook.pytest_sessionfinish(session=session, exitstatus=EXIT_OK)
+        return res
+
+    def getpathnode(self, path):
+        """Return the collection node of a file.
+
+        This is like :py:meth:`getnode` but uses :py:meth:`parseconfigure` to
+        create the (configured) pytest Config instance.
+
+        :param path: a :py:class:`py.path.local` instance of the file
+
+        """
+        config = self.parseconfigure(path)
+        session = Session(config)
+        x = session.fspath.bestrelpath(path)
+        config.hook.pytest_sessionstart(session=session)
+        res = session.perform_collect([x], genitems=False)[0]
+        config.hook.pytest_sessionfinish(session=session, exitstatus=EXIT_OK)
+        return res
+
+    def genitems(self, colitems):
+        """Generate all test items from a collection node.
+
+        This recurses into the collection node and returns a list of all the
+        test items contained within.
+
+        """
+        session = colitems[0].session
+        result = []
+        for colitem in colitems:
+            result.extend(session.genitems(colitem))
+        return result
+
+    def runitem(self, source):
+        """Run the "test_func" Item.
+
+        The calling test instance (class containing the test method) must
+        provide a ``.getrunner()`` method which should return a runner which
+        can run the test protocol for a single item, e.g.
+        :py:func:`_pytest.runner.runtestprotocol`.
+
+        """
+        # used from runner functional tests
+        item = self.getitem(source)
+        # the test class where we are called from wants to provide the runner
+        testclassinstance = self.request.instance
+        runner = testclassinstance.getrunner()
+        return runner(item)
+
+    def inline_runsource(self, source, *cmdlineargs):
+        """Run a test module in process using ``pytest.main()``.
+
+        This run writes "source" into a temporary file and runs
+        ``pytest.main()`` on it, returning a :py:class:`HookRecorder` instance
+        for the result.
+
+        :param source: the source code of the test module
+
+        :param cmdlineargs: any extra command line arguments to use
+
+        :return: :py:class:`HookRecorder` instance of the result
+
+        """
+        p = self.makepyfile(source)
+        values = list(cmdlineargs) + [p]
+        return self.inline_run(*values)
+
+    def inline_genitems(self, *args):
+        """Run ``pytest.main(['--collectonly'])`` in-process.
+
+        Runs the :py:func:`pytest.main` function to run all of pytest inside
+        the test process itself like :py:meth:`inline_run`, but returns a
+        tuple of the collected items and a :py:class:`HookRecorder` instance.
+
+        """
+        rec = self.inline_run("--collect-only", *args)
+        items = [x.item for x in rec.getcalls("pytest_itemcollected")]
+        return items, rec
+
+    def inline_run(self, *args, **kwargs):
+        """Run ``pytest.main()`` in-process, returning a HookRecorder.
+
+        Runs the :py:func:`pytest.main` function to run all of pytest inside
+        the test process itself.  This means it can return a
+        :py:class:`HookRecorder` instance which gives more detailed results
+        from that run than can be done by matching stdout/stderr from
+        :py:meth:`runpytest`.
+
+        :param args: command line arguments to pass to :py:func:`pytest.main`
+
+        :param plugins: (keyword-only) extra plugin instances the
+           ``pytest.main()`` instance should use
+
+        :return: a :py:class:`HookRecorder` instance
+        """
+        plugins = kwargs.pop("plugins", [])
+        no_reraise_ctrlc = kwargs.pop("no_reraise_ctrlc", None)
+        raise_on_kwargs(kwargs)
+
+        finalizers = []
+        try:
+            # Do not load user config (during runs only).
+            mp_run = MonkeyPatch()
+            for k, v in self._env_run_update.items():
+                mp_run.setenv(k, v)
+            finalizers.append(mp_run.undo)
+
+            # When running pytest inline any plugins active in the main test
+            # process are already imported.  So this disables the warning which
+            # will trigger to say they can no longer be rewritten, which is
+            # fine as they have already been rewritten.
+            orig_warn = AssertionRewritingHook._warn_already_imported
+
+            def revert_warn_already_imported():
+                AssertionRewritingHook._warn_already_imported = orig_warn
+
+            finalizers.append(revert_warn_already_imported)
+            AssertionRewritingHook._warn_already_imported = lambda *a: None
+
+            # Any sys.module or sys.path changes done while running pytest
+            # inline should be reverted after the test run completes to avoid
+            # clashing with later inline tests run within the same pytest test,
+            # e.g. just because they use matching test module names.
+            finalizers.append(self.__take_sys_modules_snapshot().restore)
+            finalizers.append(SysPathsSnapshot().restore)
+
+            # Important note:
+            # - our tests should not leave any other references/registrations
+            #   laying around other than possibly loaded test modules
+            #   referenced from sys.modules, as nothing will clean those up
+            #   automatically
+
+            rec = []
+
+            class Collect(object):
+                def pytest_configure(x, config):
+                    rec.append(self.make_hook_recorder(config.pluginmanager))
+
+            plugins.append(Collect())
+            ret = pytest.main(list(args), plugins=plugins)
+            if len(rec) == 1:
+                reprec = rec.pop()
+            else:
+
+                class reprec(object):
+                    pass
+
+            reprec.ret = ret
+
+            # typically we reraise keyboard interrupts from the child run
+            # because it's our user requesting interruption of the testing
+            if ret == EXIT_INTERRUPTED and not no_reraise_ctrlc:
+                calls = reprec.getcalls("pytest_keyboard_interrupt")
+                if calls and calls[-1].excinfo.type == KeyboardInterrupt:
+                    raise KeyboardInterrupt()
+            return reprec
+        finally:
+            for finalizer in finalizers:
+                finalizer()
+
+    def runpytest_inprocess(self, *args, **kwargs):
+        """Return result of running pytest in-process, providing a similar
+        interface to what self.runpytest() provides.
+        """
+        syspathinsert = kwargs.pop("syspathinsert", False)
+
+        if syspathinsert:
+            self.syspathinsert()
+        now = time.time()
+        capture = MultiCapture(Capture=SysCapture)
+        capture.start_capturing()
+        try:
+            try:
+                reprec = self.inline_run(*args, **kwargs)
+            except SystemExit as e:
+
+                class reprec(object):
+                    ret = e.args[0]
+
+            except Exception:
+                traceback.print_exc()
+
+                class reprec(object):
+                    ret = 3
+
+        finally:
+            out, err = capture.readouterr()
+            capture.stop_capturing()
+            sys.stdout.write(out)
+            sys.stderr.write(err)
+
+        res = RunResult(reprec.ret, out.split("\n"), err.split("\n"), time.time() - now)
+        res.reprec = reprec
+        return res
+
+    def runpytest(self, *args, **kwargs):
+        """Run pytest inline or in a subprocess, depending on the command line
+        option "--runpytest" and return a :py:class:`RunResult`.
+
+        """
+        args = self._ensure_basetemp(args)
+        return self._runpytest_method(*args, **kwargs)
+
+    def _ensure_basetemp(self, args):
+        args = list(args)
+        for x in args:
+            if safe_str(x).startswith("--basetemp"):
+                break
+        else:
+            args.append("--basetemp=%s" % self.tmpdir.dirpath("basetemp"))
+        return args
+
+    def parseconfig(self, *args):
+        """Return a new pytest Config instance from given commandline args.
+
+        This invokes the pytest bootstrapping code in _pytest.config to create
+        a new :py:class:`_pytest.core.PluginManager` and call the
+        pytest_cmdline_parse hook to create a new
+        :py:class:`_pytest.config.Config` instance.
+
+        If :py:attr:`plugins` has been populated they should be plugin modules
+        to be registered with the PluginManager.
+
+        """
+        args = self._ensure_basetemp(args)
+
+        import _pytest.config
+
+        config = _pytest.config._prepareconfig(args, self.plugins)
+        # we don't know what the test will do with this half-setup config
+        # object and thus we make sure it gets unconfigured properly in any
+        # case (otherwise capturing could still be active, for example)
+        self.request.addfinalizer(config._ensure_unconfigure)
+        return config
+
+    def parseconfigure(self, *args):
+        """Return a new pytest configured Config instance.
+
+        This returns a new :py:class:`_pytest.config.Config` instance like
+        :py:meth:`parseconfig`, but also calls the pytest_configure hook.
+
+        """
+        config = self.parseconfig(*args)
+        config._do_configure()
+        self.request.addfinalizer(config._ensure_unconfigure)
+        return config
+
+    def getitem(self, source, funcname="test_func"):
+        """Return the test item for a test function.
+
+        This writes the source to a python file and runs pytest's collection on
+        the resulting module, returning the test item for the requested
+        function name.
+
+        :param source: the module source
+
+        :param funcname: the name of the test function for which to return a
+            test item
+
+        """
+        items = self.getitems(source)
+        for item in items:
+            if item.name == funcname:
+                return item
+        assert 0, "%r item not found in module:\n%s\nitems: %s" % (
+            funcname,
+            source,
+            items,
+        )
+
+    def getitems(self, source):
+        """Return all test items collected from the module.
+
+        This writes the source to a python file and runs pytest's collection on
+        the resulting module, returning all test items contained within.
+
+        """
+        modcol = self.getmodulecol(source)
+        return self.genitems([modcol])
+
+    def getmodulecol(self, source, configargs=(), withinit=False):
+        """Return the module collection node for ``source``.
+
+        This writes ``source`` to a file using :py:meth:`makepyfile` and then
+        runs the pytest collection on it, returning the collection node for the
+        test module.
+
+        :param source: the source code of the module to collect
+
+        :param configargs: any extra arguments to pass to
+            :py:meth:`parseconfigure`
+
+        :param withinit: whether to also write an ``__init__.py`` file to the
+            same directory to ensure it is a package
+
+        """
+        if isinstance(source, Path):
+            path = self.tmpdir.join(str(source))
+            assert not withinit, "not supported for paths"
+        else:
+            kw = {self.request.function.__name__: Source(source).strip()}
+            path = self.makepyfile(**kw)
+        if withinit:
+            self.makepyfile(__init__="#")
+        self.config = config = self.parseconfigure(path, *configargs)
+        return self.getnode(config, path)
+
+    def collect_by_name(self, modcol, name):
+        """Return the collection node for name from the module collection.
+
+        This will search a module collection node for a collection node
+        matching the given name.
+
+        :param modcol: a module collection node; see :py:meth:`getmodulecol`
+
+        :param name: the name of the node to return
+
+        """
+        if modcol not in self._mod_collections:
+            self._mod_collections[modcol] = list(modcol.collect())
+        for colitem in self._mod_collections[modcol]:
+            if colitem.name == name:
+                return colitem
+
+    def popen(
+        self,
+        cmdargs,
+        stdout=subprocess.PIPE,
+        stderr=subprocess.PIPE,
+        stdin=CLOSE_STDIN,
+        **kw
+    ):
+        """Invoke subprocess.Popen.
+
+        This calls subprocess.Popen making sure the current working directory
+        is in the PYTHONPATH.
+
+        You probably want to use :py:meth:`run` instead.
+
+        """
+        env = os.environ.copy()
+        env["PYTHONPATH"] = os.pathsep.join(
+            filter(None, [os.getcwd(), env.get("PYTHONPATH", "")])
+        )
+        env.update(self._env_run_update)
+        kw["env"] = env
+
+        if stdin is Testdir.CLOSE_STDIN:
+            kw["stdin"] = subprocess.PIPE
+        elif isinstance(stdin, bytes):
+            kw["stdin"] = subprocess.PIPE
+        else:
+            kw["stdin"] = stdin
+
+        popen = subprocess.Popen(cmdargs, stdout=stdout, stderr=stderr, **kw)
+        if stdin is Testdir.CLOSE_STDIN:
+            popen.stdin.close()
+        elif isinstance(stdin, bytes):
+            popen.stdin.write(stdin)
+
+        return popen
+
+    def run(self, *cmdargs, **kwargs):
+        """Run a command with arguments.
+
+        Run a process using subprocess.Popen saving the stdout and stderr.
+
+        :param args: the sequence of arguments to pass to `subprocess.Popen()`
+        :param timeout: the period in seconds after which to timeout and raise
+            :py:class:`Testdir.TimeoutExpired`
+        :param stdin: optional standard input.  Bytes are being send, closing
+            the pipe, otherwise it is passed through to ``popen``.
+            Defaults to ``CLOSE_STDIN``, which translates to using a pipe
+            (``subprocess.PIPE``) that gets closed.
+
+        Returns a :py:class:`RunResult`.
+
+        """
+        __tracebackhide__ = True
+
+        timeout = kwargs.pop("timeout", None)
+        stdin = kwargs.pop("stdin", Testdir.CLOSE_STDIN)
+        raise_on_kwargs(kwargs)
+
+        cmdargs = [
+            str(arg) if isinstance(arg, py.path.local) else arg for arg in cmdargs
+        ]
+        p1 = self.tmpdir.join("stdout")
+        p2 = self.tmpdir.join("stderr")
+        print("running:", *cmdargs)
+        print("     in:", py.path.local())
+        f1 = codecs.open(str(p1), "w", encoding="utf8")
+        f2 = codecs.open(str(p2), "w", encoding="utf8")
+        try:
+            now = time.time()
+            popen = self.popen(
+                cmdargs,
+                stdin=stdin,
+                stdout=f1,
+                stderr=f2,
+                close_fds=(sys.platform != "win32"),
+            )
+            if isinstance(stdin, bytes):
+                popen.stdin.close()
+
+            def handle_timeout():
+                __tracebackhide__ = True
+
+                timeout_message = (
+                    "{seconds} second timeout expired running:"
+                    " {command}".format(seconds=timeout, command=cmdargs)
+                )
+
+                popen.kill()
+                popen.wait()
+                raise self.TimeoutExpired(timeout_message)
+
+            if timeout is None:
+                ret = popen.wait()
+            elif not six.PY2:
+                try:
+                    ret = popen.wait(timeout)
+                except subprocess.TimeoutExpired:
+                    handle_timeout()
+            else:
+                end = time.time() + timeout
+
+                resolution = min(0.1, timeout / 10)
+
+                while True:
+                    ret = popen.poll()
+                    if ret is not None:
+                        break
+
+                    if time.time() > end:
+                        handle_timeout()
+
+                    time.sleep(resolution)
+        finally:
+            f1.close()
+            f2.close()
+        f1 = codecs.open(str(p1), "r", encoding="utf8")
+        f2 = codecs.open(str(p2), "r", encoding="utf8")
+        try:
+            out = f1.read().splitlines()
+            err = f2.read().splitlines()
+        finally:
+            f1.close()
+            f2.close()
+        self._dump_lines(out, sys.stdout)
+        self._dump_lines(err, sys.stderr)
+        return RunResult(ret, out, err, time.time() - now)
+
+    def _dump_lines(self, lines, fp):
+        try:
+            for line in lines:
+                print(line, file=fp)
+        except UnicodeEncodeError:
+            print("couldn't print to %s because of encoding" % (fp,))
+
+    def _getpytestargs(self):
+        return sys.executable, "-mpytest"
+
+    def runpython(self, script):
+        """Run a python script using sys.executable as interpreter.
+
+        Returns a :py:class:`RunResult`.
+
+        """
+        return self.run(sys.executable, script)
+
+    def runpython_c(self, command):
+        """Run python -c "command", return a :py:class:`RunResult`."""
+        return self.run(sys.executable, "-c", command)
+
+    def runpytest_subprocess(self, *args, **kwargs):
+        """Run pytest as a subprocess with given arguments.
+
+        Any plugins added to the :py:attr:`plugins` list will be added using the
+        ``-p`` command line option.  Additionally ``--basetemp`` is used to put
+        any temporary files and directories in a numbered directory prefixed
+        with "runpytest-" to not conflict with the normal numbered pytest
+        location for temporary files and directories.
+
+        :param args: the sequence of arguments to pass to the pytest subprocess
+        :param timeout: the period in seconds after which to timeout and raise
+            :py:class:`Testdir.TimeoutExpired`
+
+        Returns a :py:class:`RunResult`.
+        """
+        __tracebackhide__ = True
+        timeout = kwargs.pop("timeout", None)
+        raise_on_kwargs(kwargs)
+
+        p = py.path.local.make_numbered_dir(
+            prefix="runpytest-", keep=None, rootdir=self.tmpdir
+        )
+        args = ("--basetemp=%s" % p,) + args
+        plugins = [x for x in self.plugins if isinstance(x, str)]
+        if plugins:
+            args = ("-p", plugins[0]) + args
+        args = self._getpytestargs() + args
+        return self.run(*args, timeout=timeout)
+
+    def spawn_pytest(self, string, expect_timeout=10.0):
+        """Run pytest using pexpect.
+
+        This makes sure to use the right pytest and sets up the temporary
+        directory locations.
+
+        The pexpect child is returned.
+
+        """
+        basetemp = self.tmpdir.mkdir("temp-pexpect")
+        invoke = " ".join(map(str, self._getpytestargs()))
+        cmd = "%s --basetemp=%s %s" % (invoke, basetemp, string)
+        return self.spawn(cmd, expect_timeout=expect_timeout)
+
+    def spawn(self, cmd, expect_timeout=10.0):
+        """Run a command using pexpect.
+
+        The pexpect child is returned.
+
+        """
+        pexpect = pytest.importorskip("pexpect", "3.0")
+        if hasattr(sys, "pypy_version_info") and "64" in platform.machine():
+            pytest.skip("pypy-64 bit not supported")
+        if sys.platform.startswith("freebsd"):
+            pytest.xfail("pexpect does not work reliably on freebsd")
+        logfile = self.tmpdir.join("spawn.out").open("wb")
+
+        # Do not load user config.
+        env = os.environ.copy()
+        env.update(self._env_run_update)
+
+        child = pexpect.spawn(cmd, logfile=logfile, env=env)
+        self.request.addfinalizer(logfile.close)
+        child.timeout = expect_timeout
+        return child
+
+
+def getdecoded(out):
+    try:
+        return out.decode("utf-8")
+    except UnicodeDecodeError:
+        return "INTERNAL not-utf8-decodeable, truncated string:\n%s" % (saferepr(out),)
+
+
+class LineComp(object):
+    def __init__(self):
+        self.stringio = py.io.TextIO()
+
+    def assert_contains_lines(self, lines2):
+        """Assert that lines2 are contained (linearly) in lines1.
+
+        Return a list of extralines found.
+
+        """
+        __tracebackhide__ = True
+        val = self.stringio.getvalue()
+        self.stringio.truncate(0)
+        self.stringio.seek(0)
+        lines1 = val.split("\n")
+        return LineMatcher(lines1).fnmatch_lines(lines2)
+
+
+class LineMatcher(object):
+    """Flexible matching of text.
+
+    This is a convenience class to test large texts like the output of
+    commands.
+
+    The constructor takes a list of lines without their trailing newlines, i.e.
+    ``text.splitlines()``.
+
+    """
+
+    def __init__(self, lines):
+        self.lines = lines
+        self._log_output = []
+
+    def str(self):
+        """Return the entire original text."""
+        return "\n".join(self.lines)
+
+    def _getlines(self, lines2):
+        if isinstance(lines2, str):
+            lines2 = Source(lines2)
+        if isinstance(lines2, Source):
+            lines2 = lines2.strip().lines
+        return lines2
+
+    def fnmatch_lines_random(self, lines2):
+        """Check lines exist in the output using in any order.
+
+        Lines are checked using ``fnmatch.fnmatch``. The argument is a list of
+        lines which have to occur in the output, in any order.
+
+        """
+        self._match_lines_random(lines2, fnmatch)
+
+    def re_match_lines_random(self, lines2):
+        """Check lines exist in the output using ``re.match``, in any order.
+
+        The argument is a list of lines which have to occur in the output, in
+        any order.
+
+        """
+        self._match_lines_random(lines2, lambda name, pat: re.match(pat, name))
+
+    def _match_lines_random(self, lines2, match_func):
+        """Check lines exist in the output.
+
+        The argument is a list of lines which have to occur in the output, in
+        any order.  Each line can contain glob whildcards.
+
+        """
+        lines2 = self._getlines(lines2)
+        for line in lines2:
+            for x in self.lines:
+                if line == x or match_func(x, line):
+                    self._log("matched: ", repr(line))
+                    break
+            else:
+                self._log("line %r not found in output" % line)
+                raise ValueError(self._log_text)
+
+    def get_lines_after(self, fnline):
+        """Return all lines following the given line in the text.
+
+        The given line can contain glob wildcards.
+
+        """
+        for i, line in enumerate(self.lines):
+            if fnline == line or fnmatch(line, fnline):
+                return self.lines[i + 1 :]
+        raise ValueError("line %r not found in output" % fnline)
+
+    def _log(self, *args):
+        self._log_output.append(" ".join(str(x) for x in args))
+
+    @property
+    def _log_text(self):
+        return "\n".join(self._log_output)
+
+    def fnmatch_lines(self, lines2):
+        """Search captured text for matching lines using ``fnmatch.fnmatch``.
+
+        The argument is a list of lines which have to match and can use glob
+        wildcards.  If they do not match a pytest.fail() is called.  The
+        matches and non-matches are also printed on stdout.
+
+        """
+        __tracebackhide__ = True
+        self._match_lines(lines2, fnmatch, "fnmatch")
+
+    def re_match_lines(self, lines2):
+        """Search captured text for matching lines using ``re.match``.
+
+        The argument is a list of lines which have to match using ``re.match``.
+        If they do not match a pytest.fail() is called.
+
+        The matches and non-matches are also printed on stdout.
+
+        """
+        __tracebackhide__ = True
+        self._match_lines(lines2, lambda name, pat: re.match(pat, name), "re.match")
+
+    def _match_lines(self, lines2, match_func, match_nickname):
+        """Underlying implementation of ``fnmatch_lines`` and ``re_match_lines``.
+
+        :param list[str] lines2: list of string patterns to match. The actual
+            format depends on ``match_func``
+        :param match_func: a callable ``match_func(line, pattern)`` where line
+            is the captured line from stdout/stderr and pattern is the matching
+            pattern
+        :param str match_nickname: the nickname for the match function that
+            will be logged to stdout when a match occurs
+
+        """
+        assert isinstance(lines2, Sequence)
+        lines2 = self._getlines(lines2)
+        lines1 = self.lines[:]
+        nextline = None
+        extralines = []
+        __tracebackhide__ = True
+        for line in lines2:
+            nomatchprinted = False
+            while lines1:
+                nextline = lines1.pop(0)
+                if line == nextline:
+                    self._log("exact match:", repr(line))
+                    break
+                elif match_func(nextline, line):
+                    self._log("%s:" % match_nickname, repr(line))
+                    self._log("   with:", repr(nextline))
+                    break
+                else:
+                    if not nomatchprinted:
+                        self._log("nomatch:", repr(line))
+                        nomatchprinted = True
+                    self._log("    and:", repr(nextline))
+                extralines.append(nextline)
+            else:
+                self._log("remains unmatched: %r" % (line,))
+                pytest.fail(self._log_text)
diff --git a/contrib/python/pytest/py2/_pytest/python.py b/contrib/python/pytest/py2/_pytest/python.py
new file mode 100644
index 0000000000..f7c368b0c4
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/python.py
@@ -0,0 +1,1507 @@
+# -*- coding: utf-8 -*-
+""" Python test discovery, setup and run of test functions. """
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import collections
+import fnmatch
+import inspect
+import os
+import sys
+import warnings
+from functools import partial
+from textwrap import dedent
+
+import py
+import six
+
+import _pytest
+from _pytest import deprecated
+from _pytest import fixtures
+from _pytest import nodes
+from _pytest._code import filter_traceback
+from _pytest.compat import ascii_escaped
+from _pytest.compat import enum
+from _pytest.compat import get_default_arg_names
+from _pytest.compat import get_real_func
+from _pytest.compat import getfslineno
+from _pytest.compat import getimfunc
+from _pytest.compat import getlocation
+from _pytest.compat import is_generator
+from _pytest.compat import isclass
+from _pytest.compat import isfunction
+from _pytest.compat import NOTSET
+from _pytest.compat import REGEX_TYPE
+from _pytest.compat import safe_getattr
+from _pytest.compat import safe_isclass
+from _pytest.compat import safe_str
+from _pytest.compat import STRING_TYPES
+from _pytest.config import hookimpl
+from _pytest.main import FSHookProxy
+from _pytest.mark import MARK_GEN
+from _pytest.mark.structures import get_unpacked_marks
+from _pytest.mark.structures import normalize_mark_list
+from _pytest.outcomes import fail
+from _pytest.outcomes import skip
+from _pytest.pathlib import parts
+from _pytest.warning_types import PytestCollectionWarning
+from _pytest.warning_types import PytestUnhandledCoroutineWarning
+
+
+def pyobj_property(name):
+    def get(self):
+        node = self.getparent(getattr(__import__("pytest"), name))
+        if node is not None:
+            return node.obj
+
+    doc = "python %s object this node was collected from (can be None)." % (
+        name.lower(),
+    )
+    return property(get, None, None, doc)
+
+
+def pytest_addoption(parser):
+    group = parser.getgroup("general")
+    group.addoption(
+        "--fixtures",
+        "--funcargs",
+        action="store_true",
+        dest="showfixtures",
+        default=False,
+        help="show available fixtures, sorted by plugin appearance "
+        "(fixtures with leading '_' are only shown with '-v')",
+    )
+    group.addoption(
+        "--fixtures-per-test",
+        action="store_true",
+        dest="show_fixtures_per_test",
+        default=False,
+        help="show fixtures per test",
+    )
+    parser.addini(
+        "python_files",
+        type="args",
+        # NOTE: default is also used in AssertionRewritingHook.
+        default=["test_*.py", "*_test.py"],
+        help="glob-style file patterns for Python test module discovery",
+    )
+    parser.addini(
+        "python_classes",
+        type="args",
+        default=["Test"],
+        help="prefixes or glob names for Python test class discovery",
+    )
+    parser.addini(
+        "python_functions",
+        type="args",
+        default=["test"],
+        help="prefixes or glob names for Python test function and method discovery",
+    )
+    parser.addini(
+        "disable_test_id_escaping_and_forfeit_all_rights_to_community_support",
+        type="bool",
+        default=False,
+        help="disable string escape non-ascii characters, might cause unwanted "
+        "side effects(use at your own risk)",
+    )
+
+    group.addoption(
+        "--import-mode",
+        default="prepend",
+        choices=["prepend", "append"],
+        dest="importmode",
+        help="prepend/append to sys.path when importing test modules, "
+        "default is to prepend.",
+    )
+
+
+def pytest_cmdline_main(config):
+    if config.option.showfixtures:
+        showfixtures(config)
+        return 0
+    if config.option.show_fixtures_per_test:
+        show_fixtures_per_test(config)
+        return 0
+
+
+def pytest_generate_tests(metafunc):
+    # those alternative spellings are common - raise a specific error to alert
+    # the user
+    alt_spellings = ["parameterize", "parametrise", "parameterise"]
+    for mark_name in alt_spellings:
+        if metafunc.definition.get_closest_marker(mark_name):
+            msg = "{0} has '{1}' mark, spelling should be 'parametrize'"
+            fail(msg.format(metafunc.function.__name__, mark_name), pytrace=False)
+    for marker in metafunc.definition.iter_markers(name="parametrize"):
+        metafunc.parametrize(*marker.args, **marker.kwargs)
+
+
+def pytest_configure(config):
+    config.addinivalue_line(
+        "markers",
+        "parametrize(argnames, argvalues): call a test function multiple "
+        "times passing in different arguments in turn. argvalues generally "
+        "needs to be a list of values if argnames specifies only one name "
+        "or a list of tuples of values if argnames specifies multiple names. "
+        "Example: @parametrize('arg1', [1,2]) would lead to two calls of the "
+        "decorated test function, one with arg1=1 and another with arg1=2."
+        "see https://docs.pytest.org/en/latest/parametrize.html for more info "
+        "and examples.",
+    )
+    config.addinivalue_line(
+        "markers",
+        "usefixtures(fixturename1, fixturename2, ...): mark tests as needing "
+        "all of the specified fixtures. see "
+        "https://docs.pytest.org/en/latest/fixture.html#usefixtures ",
+    )
+
+
+@hookimpl(trylast=True)
+def pytest_pyfunc_call(pyfuncitem):
+    testfunction = pyfuncitem.obj
+    iscoroutinefunction = getattr(inspect, "iscoroutinefunction", None)
+    if iscoroutinefunction is not None and iscoroutinefunction(testfunction):
+        msg = "Coroutine functions are not natively supported and have been skipped.\n"
+        msg += "You need to install a suitable plugin for your async framework, for example:\n"
+        msg += "  - pytest-asyncio\n"
+        msg += "  - pytest-trio\n"
+        msg += "  - pytest-tornasync"
+        warnings.warn(PytestUnhandledCoroutineWarning(msg.format(pyfuncitem.nodeid)))
+        skip(msg="coroutine function and no async plugin installed (see warnings)")
+    funcargs = pyfuncitem.funcargs
+    testargs = {arg: funcargs[arg] for arg in pyfuncitem._fixtureinfo.argnames}
+    testfunction(**testargs)
+    return True
+
+
+def pytest_collect_file(path, parent):
+    ext = path.ext
+    if ext == ".py":
+        if not parent.session.isinitpath(path):
+            if not path_matches_patterns(
+                path, parent.config.getini("python_files") + ["__init__.py"]
+            ):
+                return
+        ihook = parent.session.gethookproxy(path)
+        return ihook.pytest_pycollect_makemodule(path=path, parent=parent)
+
+
+def path_matches_patterns(path, patterns):
+    """Returns True if the given py.path.local matches one of the patterns in the list of globs given"""
+    return any(path.fnmatch(pattern) for pattern in patterns)
+
+
+def pytest_pycollect_makemodule(path, parent):
+    if path.basename == "__init__.py":
+        return Package(path, parent)
+    return Module(path, parent)
+
+
+@hookimpl(hookwrapper=True)
+def pytest_pycollect_makeitem(collector, name, obj):
+    outcome = yield
+    res = outcome.get_result()
+    if res is not None:
+        return
+    # nothing was collected elsewhere, let's do it here
+    if safe_isclass(obj):
+        if collector.istestclass(obj, name):
+            outcome.force_result(Class(name, parent=collector))
+    elif collector.istestfunction(obj, name):
+        # mock seems to store unbound methods (issue473), normalize it
+        obj = getattr(obj, "__func__", obj)
+        # We need to try and unwrap the function if it's a functools.partial
+        # or a funtools.wrapped.
+        # We musn't if it's been wrapped with mock.patch (python 2 only)
+        if not (isfunction(obj) or isfunction(get_real_func(obj))):
+            filename, lineno = getfslineno(obj)
+            warnings.warn_explicit(
+                message=PytestCollectionWarning(
+                    "cannot collect %r because it is not a function." % name
+                ),
+                category=None,
+                filename=str(filename),
+                lineno=lineno + 1,
+            )
+        elif getattr(obj, "__test__", True):
+            if is_generator(obj):
+                res = Function(name, parent=collector)
+                reason = deprecated.YIELD_TESTS.format(name=name)
+                res.add_marker(MARK_GEN.xfail(run=False, reason=reason))
+                res.warn(PytestCollectionWarning(reason))
+            else:
+                res = list(collector._genfunctions(name, obj))
+            outcome.force_result(res)
+
+
+def pytest_make_parametrize_id(config, val, argname=None):
+    return None
+
+
+class PyobjContext(object):
+    module = pyobj_property("Module")
+    cls = pyobj_property("Class")
+    instance = pyobj_property("Instance")
+
+
+class PyobjMixin(PyobjContext):
+    _ALLOW_MARKERS = True
+
+    def __init__(self, *k, **kw):
+        super(PyobjMixin, self).__init__(*k, **kw)
+
+    @property
+    def obj(self):
+        """Underlying Python object."""
+        obj = getattr(self, "_obj", None)
+        if obj is None:
+            self._obj = obj = self._getobj()
+            # XXX evil hack
+            # used to avoid Instance collector marker duplication
+            if self._ALLOW_MARKERS:
+                self.own_markers.extend(get_unpacked_marks(self.obj))
+        return obj
+
+    @obj.setter
+    def obj(self, value):
+        self._obj = value
+
+    def _getobj(self):
+        """Gets the underlying Python object. May be overwritten by subclasses."""
+        return getattr(self.parent.obj, self.name)
+
+    def getmodpath(self, stopatmodule=True, includemodule=False):
+        """ return python path relative to the containing module. """
+        chain = self.listchain()
+        chain.reverse()
+        parts = []
+        for node in chain:
+            if isinstance(node, Instance):
+                continue
+            name = node.name
+            if isinstance(node, Module):
+                name = os.path.splitext(name)[0]
+                if stopatmodule:
+                    if includemodule:
+                        parts.append(name)
+                    break
+            parts.append(name)
+        parts.reverse()
+        s = ".".join(parts)
+        return s.replace(".[", "[")
+
+    def reportinfo(self):
+        # XXX caching?
+        obj = self.obj
+        compat_co_firstlineno = getattr(obj, "compat_co_firstlineno", None)
+        if isinstance(compat_co_firstlineno, int):
+            # nose compatibility
+            fspath = sys.modules[obj.__module__].__file__
+            if fspath.endswith(".pyc"):
+                fspath = fspath[:-1]
+            lineno = compat_co_firstlineno
+        else:
+            fspath, lineno = getfslineno(obj)
+        modpath = self.getmodpath()
+        assert isinstance(lineno, int)
+        return fspath, lineno, modpath
+
+
+class PyCollector(PyobjMixin, nodes.Collector):
+    def funcnamefilter(self, name):
+        return self._matches_prefix_or_glob_option("python_functions", name)
+
+    def isnosetest(self, obj):
+        """ Look for the __test__ attribute, which is applied by the
+        @nose.tools.istest decorator
+        """
+        # We explicitly check for "is True" here to not mistakenly treat
+        # classes with a custom __getattr__ returning something truthy (like a
+        # function) as test classes.
+        return safe_getattr(obj, "__test__", False) is True
+
+    def classnamefilter(self, name):
+        return self._matches_prefix_or_glob_option("python_classes", name)
+
+    def istestfunction(self, obj, name):
+        if self.funcnamefilter(name) or self.isnosetest(obj):
+            if isinstance(obj, staticmethod):
+                # static methods need to be unwrapped
+                obj = safe_getattr(obj, "__func__", False)
+            return (
+                safe_getattr(obj, "__call__", False)
+                and fixtures.getfixturemarker(obj) is None
+            )
+        else:
+            return False
+
+    def istestclass(self, obj, name):
+        return self.classnamefilter(name) or self.isnosetest(obj)
+
+    def _matches_prefix_or_glob_option(self, option_name, name):
+        """
+        checks if the given name matches the prefix or glob-pattern defined
+        in ini configuration.
+        """
+        for option in self.config.getini(option_name):
+            if name.startswith(option):
+                return True
+            # check that name looks like a glob-string before calling fnmatch
+            # because this is called for every name in each collected module,
+            # and fnmatch is somewhat expensive to call
+            elif ("*" in option or "?" in option or "[" in option) and fnmatch.fnmatch(
+                name, option
+            ):
+                return True
+        return False
+
+    def collect(self):
+        if not getattr(self.obj, "__test__", True):
+            return []
+
+        # NB. we avoid random getattrs and peek in the __dict__ instead
+        # (XXX originally introduced from a PyPy need, still true?)
+        dicts = [getattr(self.obj, "__dict__", {})]
+        for basecls in inspect.getmro(self.obj.__class__):
+            dicts.append(basecls.__dict__)
+        seen = {}
+        values = []
+        for dic in dicts:
+            for name, obj in list(dic.items()):
+                if name in seen:
+                    continue
+                seen[name] = True
+                res = self._makeitem(name, obj)
+                if res is None:
+                    continue
+                if not isinstance(res, list):
+                    res = [res]
+                values.extend(res)
+        values.sort(key=lambda item: item.reportinfo()[:2])
+        return values
+
+    def _makeitem(self, name, obj):
+        # assert self.ihook.fspath == self.fspath, self
+        return self.ihook.pytest_pycollect_makeitem(collector=self, name=name, obj=obj)
+
+    def _genfunctions(self, name, funcobj):
+        module = self.getparent(Module).obj
+        clscol = self.getparent(Class)
+        cls = clscol and clscol.obj or None
+        fm = self.session._fixturemanager
+
+        definition = FunctionDefinition(name=name, parent=self, callobj=funcobj)
+        fixtureinfo = fm.getfixtureinfo(definition, funcobj, cls)
+
+        metafunc = Metafunc(
+            definition, fixtureinfo, self.config, cls=cls, module=module
+        )
+        methods = []
+        if hasattr(module, "pytest_generate_tests"):
+            methods.append(module.pytest_generate_tests)
+        if hasattr(cls, "pytest_generate_tests"):
+            methods.append(cls().pytest_generate_tests)
+        if methods:
+            self.ihook.pytest_generate_tests.call_extra(
+                methods, dict(metafunc=metafunc)
+            )
+        else:
+            self.ihook.pytest_generate_tests(metafunc=metafunc)
+
+        if not metafunc._calls:
+            yield Function(name, parent=self, fixtureinfo=fixtureinfo)
+        else:
+            # add funcargs() as fixturedefs to fixtureinfo.arg2fixturedefs
+            fixtures.add_funcarg_pseudo_fixture_def(self, metafunc, fm)
+
+            # add_funcarg_pseudo_fixture_def may have shadowed some fixtures
+            # with direct parametrization, so make sure we update what the
+            # function really needs.
+            fixtureinfo.prune_dependency_tree()
+
+            for callspec in metafunc._calls:
+                subname = "%s[%s]" % (name, callspec.id)
+                yield Function(
+                    name=subname,
+                    parent=self,
+                    callspec=callspec,
+                    callobj=funcobj,
+                    fixtureinfo=fixtureinfo,
+                    keywords={callspec.id: True},
+                    originalname=name,
+                )
+
+
+class Module(nodes.File, PyCollector):
+    """ Collector for test classes and functions. """
+
+    def _getobj(self):
+        return self._importtestmodule()
+
+    def collect(self):
+        self._inject_setup_module_fixture()
+        self._inject_setup_function_fixture()
+        self.session._fixturemanager.parsefactories(self)
+        return super(Module, self).collect()
+
+    def _inject_setup_module_fixture(self):
+        """Injects a hidden autouse, module scoped fixture into the collected module object
+        that invokes setUpModule/tearDownModule if either or both are available.
+
+        Using a fixture to invoke this methods ensures we play nicely and unsurprisingly with
+        other fixtures (#517).
+        """
+        setup_module = _get_non_fixture_func(self.obj, "setUpModule")
+        if setup_module is None:
+            setup_module = _get_non_fixture_func(self.obj, "setup_module")
+
+        teardown_module = _get_non_fixture_func(self.obj, "tearDownModule")
+        if teardown_module is None:
+            teardown_module = _get_non_fixture_func(self.obj, "teardown_module")
+
+        if setup_module is None and teardown_module is None:
+            return
+
+        @fixtures.fixture(autouse=True, scope="module")
+        def xunit_setup_module_fixture(request):
+            if setup_module is not None:
+                _call_with_optional_argument(setup_module, request.module)
+            yield
+            if teardown_module is not None:
+                _call_with_optional_argument(teardown_module, request.module)
+
+        self.obj.__pytest_setup_module = xunit_setup_module_fixture
+
+    def _inject_setup_function_fixture(self):
+        """Injects a hidden autouse, function scoped fixture into the collected module object
+        that invokes setup_function/teardown_function if either or both are available.
+
+        Using a fixture to invoke this methods ensures we play nicely and unsurprisingly with
+        other fixtures (#517).
+        """
+        setup_function = _get_non_fixture_func(self.obj, "setup_function")
+        teardown_function = _get_non_fixture_func(self.obj, "teardown_function")
+        if setup_function is None and teardown_function is None:
+            return
+
+        @fixtures.fixture(autouse=True, scope="function")
+        def xunit_setup_function_fixture(request):
+            if request.instance is not None:
+                # in this case we are bound to an instance, so we need to let
+                # setup_method handle this
+                yield
+                return
+            if setup_function is not None:
+                _call_with_optional_argument(setup_function, request.function)
+            yield
+            if teardown_function is not None:
+                _call_with_optional_argument(teardown_function, request.function)
+
+        self.obj.__pytest_setup_function = xunit_setup_function_fixture
+
+    def _importtestmodule(self):
+        # we assume we are only called once per module
+        importmode = self.config.getoption("--import-mode")
+        try:
+            mod = self.fspath.pyimport(ensuresyspath=importmode)
+        except SyntaxError:
+            raise self.CollectError(
+                _pytest._code.ExceptionInfo.from_current().getrepr(style="short")
+            )
+        except self.fspath.ImportMismatchError:
+            e = sys.exc_info()[1]
+            raise self.CollectError(
+                "import file mismatch:\n"
+                "imported module %r has this __file__ attribute:\n"
+                "  %s\n"
+                "which is not the same as the test file we want to collect:\n"
+                "  %s\n"
+                "HINT: remove __pycache__ / .pyc files and/or use a "
+                "unique basename for your test file modules" % e.args
+            )
+        except ImportError:
+            from _pytest._code.code import ExceptionInfo
+
+            exc_info = ExceptionInfo.from_current()
+            if self.config.getoption("verbose") < 2:
+                exc_info.traceback = exc_info.traceback.filter(filter_traceback)
+            exc_repr = (
+                exc_info.getrepr(style="short")
+                if exc_info.traceback
+                else exc_info.exconly()
+            )
+            formatted_tb = safe_str(exc_repr)
+            raise self.CollectError(
+                "ImportError while importing test module '{fspath}'.\n"
+                "Hint: make sure your test modules/packages have valid Python names.\n"
+                "Traceback:\n"
+                "{traceback}".format(fspath=self.fspath, traceback=formatted_tb)
+            )
+        except _pytest.runner.Skipped as e:
+            if e.allow_module_level:
+                raise
+            raise self.CollectError(
+                "Using pytest.skip outside of a test is not allowed. "
+                "To decorate a test function, use the @pytest.mark.skip "
+                "or @pytest.mark.skipif decorators instead, and to skip a "
+                "module use `pytestmark = pytest.mark.{skip,skipif}."
+            )
+        self.config.pluginmanager.consider_module(mod)
+        return mod
+
+
+class Package(Module):
+    def __init__(self, fspath, parent=None, config=None, session=None, nodeid=None):
+        session = parent.session
+        nodes.FSCollector.__init__(
+            self, fspath, parent=parent, config=config, session=session, nodeid=nodeid
+        )
+        self.name = fspath.dirname
+        self.trace = session.trace
+        self._norecursepatterns = session._norecursepatterns
+        self.fspath = fspath
+
+    def setup(self):
+        # not using fixtures to call setup_module here because autouse fixtures
+        # from packages are not called automatically (#4085)
+        setup_module = _get_non_fixture_func(self.obj, "setUpModule")
+        if setup_module is None:
+            setup_module = _get_non_fixture_func(self.obj, "setup_module")
+        if setup_module is not None:
+            _call_with_optional_argument(setup_module, self.obj)
+
+        teardown_module = _get_non_fixture_func(self.obj, "tearDownModule")
+        if teardown_module is None:
+            teardown_module = _get_non_fixture_func(self.obj, "teardown_module")
+        if teardown_module is not None:
+            func = partial(_call_with_optional_argument, teardown_module, self.obj)
+            self.addfinalizer(func)
+
+    def _recurse(self, dirpath):
+        if dirpath.basename == "__pycache__":
+            return False
+        ihook = self.gethookproxy(dirpath.dirpath())
+        if ihook.pytest_ignore_collect(path=dirpath, config=self.config):
+            return
+        for pat in self._norecursepatterns:
+            if dirpath.check(fnmatch=pat):
+                return False
+        ihook = self.gethookproxy(dirpath)
+        ihook.pytest_collect_directory(path=dirpath, parent=self)
+        return True
+
+    def gethookproxy(self, fspath):
+        # check if we have the common case of running
+        # hooks with all conftest.py filesall conftest.py
+        pm = self.config.pluginmanager
+        my_conftestmodules = pm._getconftestmodules(fspath)
+        remove_mods = pm._conftest_plugins.difference(my_conftestmodules)
+        if remove_mods:
+            # one or more conftests are not in use at this fspath
+            proxy = FSHookProxy(fspath, pm, remove_mods)
+        else:
+            # all plugis are active for this fspath
+            proxy = self.config.hook
+        return proxy
+
+    def _collectfile(self, path, handle_dupes=True):
+        assert path.isfile(), "%r is not a file (isdir=%r, exists=%r, islink=%r)" % (
+            path,
+            path.isdir(),
+            path.exists(),
+            path.islink(),
+        )
+        ihook = self.gethookproxy(path)
+        if not self.isinitpath(path):
+            if ihook.pytest_ignore_collect(path=path, config=self.config):
+                return ()
+
+        if handle_dupes:
+            keepduplicates = self.config.getoption("keepduplicates")
+            if not keepduplicates:
+                duplicate_paths = self.config.pluginmanager._duplicatepaths
+                if path in duplicate_paths:
+                    return ()
+                else:
+                    duplicate_paths.add(path)
+
+        if self.fspath == path:  # __init__.py
+            return [self]
+
+        return ihook.pytest_collect_file(path=path, parent=self)
+
+    def isinitpath(self, path):
+        return path in self.session._initialpaths
+
+    def collect(self):
+        this_path = self.fspath.dirpath()
+        init_module = this_path.join("__init__.py")
+        if init_module.check(file=1) and path_matches_patterns(
+            init_module, self.config.getini("python_files")
+        ):
+            yield Module(init_module, self)
+        pkg_prefixes = set()
+        for path in this_path.visit(rec=self._recurse, bf=True, sort=True):
+            # We will visit our own __init__.py file, in which case we skip it.
+            is_file = path.isfile()
+            if is_file:
+                if path.basename == "__init__.py" and path.dirpath() == this_path:
+                    continue
+
+            parts_ = parts(path.strpath)
+            if any(
+                pkg_prefix in parts_ and pkg_prefix.join("__init__.py") != path
+                for pkg_prefix in pkg_prefixes
+            ):
+                continue
+
+            if is_file:
+                for x in self._collectfile(path):
+                    yield x
+            elif not path.isdir():
+                # Broken symlink or invalid/missing file.
+                continue
+            elif path.join("__init__.py").check(file=1):
+                pkg_prefixes.add(path)
+
+
+def _get_xunit_setup_teardown(holder, attr_name, param_obj=None):
+    """
+    Return a callable to perform xunit-style setup or teardown if
+    the function exists in the ``holder`` object.
+    The ``param_obj`` parameter is the parameter which will be passed to the function
+    when the callable is called without arguments, defaults to the ``holder`` object.
+    Return ``None`` if a suitable callable is not found.
+    """
+    # TODO: only needed because of Package!
+    param_obj = param_obj if param_obj is not None else holder
+    result = _get_non_fixture_func(holder, attr_name)
+    if result is not None:
+        arg_count = result.__code__.co_argcount
+        if inspect.ismethod(result):
+            arg_count -= 1
+        if arg_count:
+            return lambda: result(param_obj)
+        else:
+            return result
+
+
+def _call_with_optional_argument(func, arg):
+    """Call the given function with the given argument if func accepts one argument, otherwise
+    calls func without arguments"""
+    arg_count = func.__code__.co_argcount
+    if inspect.ismethod(func):
+        arg_count -= 1
+    if arg_count:
+        func(arg)
+    else:
+        func()
+
+
+def _get_non_fixture_func(obj, name):
+    """Return the attribute from the given object to be used as a setup/teardown
+    xunit-style function, but only if not marked as a fixture to
+    avoid calling it twice.
+    """
+    meth = getattr(obj, name, None)
+    if fixtures.getfixturemarker(meth) is None:
+        return meth
+
+
+class Class(PyCollector):
+    """ Collector for test methods. """
+
+    def collect(self):
+        if not safe_getattr(self.obj, "__test__", True):
+            return []
+        if hasinit(self.obj):
+            self.warn(
+                PytestCollectionWarning(
+                    "cannot collect test class %r because it has a "
+                    "__init__ constructor (from: %s)"
+                    % (self.obj.__name__, self.parent.nodeid)
+                )
+            )
+            return []
+        elif hasnew(self.obj):
+            self.warn(
+                PytestCollectionWarning(
+                    "cannot collect test class %r because it has a "
+                    "__new__ constructor (from: %s)"
+                    % (self.obj.__name__, self.parent.nodeid)
+                )
+            )
+            return []
+
+        self._inject_setup_class_fixture()
+        self._inject_setup_method_fixture()
+
+        return [Instance(name="()", parent=self)]
+
+    def _inject_setup_class_fixture(self):
+        """Injects a hidden autouse, class scoped fixture into the collected class object
+        that invokes setup_class/teardown_class if either or both are available.
+
+        Using a fixture to invoke this methods ensures we play nicely and unsurprisingly with
+        other fixtures (#517).
+        """
+        setup_class = _get_non_fixture_func(self.obj, "setup_class")
+        teardown_class = getattr(self.obj, "teardown_class", None)
+        if setup_class is None and teardown_class is None:
+            return
+
+        @fixtures.fixture(autouse=True, scope="class")
+        def xunit_setup_class_fixture(cls):
+            if setup_class is not None:
+                func = getimfunc(setup_class)
+                _call_with_optional_argument(func, self.obj)
+            yield
+            if teardown_class is not None:
+                func = getimfunc(teardown_class)
+                _call_with_optional_argument(func, self.obj)
+
+        self.obj.__pytest_setup_class = xunit_setup_class_fixture
+
+    def _inject_setup_method_fixture(self):
+        """Injects a hidden autouse, function scoped fixture into the collected class object
+        that invokes setup_method/teardown_method if either or both are available.
+
+        Using a fixture to invoke this methods ensures we play nicely and unsurprisingly with
+        other fixtures (#517).
+        """
+        setup_method = _get_non_fixture_func(self.obj, "setup_method")
+        teardown_method = getattr(self.obj, "teardown_method", None)
+        if setup_method is None and teardown_method is None:
+            return
+
+        @fixtures.fixture(autouse=True, scope="function")
+        def xunit_setup_method_fixture(self, request):
+            method = request.function
+            if setup_method is not None:
+                func = getattr(self, "setup_method")
+                _call_with_optional_argument(func, method)
+            yield
+            if teardown_method is not None:
+                func = getattr(self, "teardown_method")
+                _call_with_optional_argument(func, method)
+
+        self.obj.__pytest_setup_method = xunit_setup_method_fixture
+
+
+class Instance(PyCollector):
+    _ALLOW_MARKERS = False  # hack, destroy later
+    # instances share the object with their parents in a way
+    # that duplicates markers instances if not taken out
+    # can be removed at node structure reorganization time
+
+    def _getobj(self):
+        return self.parent.obj()
+
+    def collect(self):
+        self.session._fixturemanager.parsefactories(self)
+        return super(Instance, self).collect()
+
+    def newinstance(self):
+        self.obj = self._getobj()
+        return self.obj
+
+
+class FunctionMixin(PyobjMixin):
+    """ mixin for the code common to Function and Generator.
+    """
+
+    def setup(self):
+        """ perform setup for this test function. """
+        if isinstance(self.parent, Instance):
+            self.parent.newinstance()
+            self.obj = self._getobj()
+
+    def _prunetraceback(self, excinfo):
+        if hasattr(self, "_obj") and not self.config.getoption("fulltrace", False):
+            code = _pytest._code.Code(get_real_func(self.obj))
+            path, firstlineno = code.path, code.firstlineno
+            traceback = excinfo.traceback
+            ntraceback = traceback.cut(path=path, firstlineno=firstlineno)
+            if ntraceback == traceback:
+                ntraceback = ntraceback.cut(path=path)
+                if ntraceback == traceback:
+                    ntraceback = ntraceback.filter(filter_traceback)
+                    if not ntraceback:
+                        ntraceback = traceback
+
+            excinfo.traceback = ntraceback.filter()
+            # issue364: mark all but first and last frames to
+            # only show a single-line message for each frame
+            if self.config.getoption("tbstyle", "auto") == "auto":
+                if len(excinfo.traceback) > 2:
+                    for entry in excinfo.traceback[1:-1]:
+                        entry.set_repr_style("short")
+
+    def repr_failure(self, excinfo, outerr=None):
+        assert outerr is None, "XXX outerr usage is deprecated"
+        style = self.config.getoption("tbstyle", "auto")
+        if style == "auto":
+            style = "long"
+        return self._repr_failure_py(excinfo, style=style)
+
+
+def hasinit(obj):
+    init = getattr(obj, "__init__", None)
+    if init:
+        return init != object.__init__
+
+
+def hasnew(obj):
+    new = getattr(obj, "__new__", None)
+    if new:
+        return new != object.__new__
+
+
+class CallSpec2(object):
+    def __init__(self, metafunc):
+        self.metafunc = metafunc
+        self.funcargs = {}
+        self._idlist = []
+        self.params = {}
+        self._globalid = NOTSET
+        self._globalparam = NOTSET
+        self._arg2scopenum = {}  # used for sorting parametrized resources
+        self.marks = []
+        self.indices = {}
+
+    def copy(self):
+        cs = CallSpec2(self.metafunc)
+        cs.funcargs.update(self.funcargs)
+        cs.params.update(self.params)
+        cs.marks.extend(self.marks)
+        cs.indices.update(self.indices)
+        cs._arg2scopenum.update(self._arg2scopenum)
+        cs._idlist = list(self._idlist)
+        cs._globalid = self._globalid
+        cs._globalparam = self._globalparam
+        return cs
+
+    def _checkargnotcontained(self, arg):
+        if arg in self.params or arg in self.funcargs:
+            raise ValueError("duplicate %r" % (arg,))
+
+    def getparam(self, name):
+        try:
+            return self.params[name]
+        except KeyError:
+            if self._globalparam is NOTSET:
+                raise ValueError(name)
+            return self._globalparam
+
+    @property
+    def id(self):
+        return "-".join(map(safe_str, self._idlist))
+
+    def setmulti2(self, valtypes, argnames, valset, id, marks, scopenum, param_index):
+        for arg, val in zip(argnames, valset):
+            self._checkargnotcontained(arg)
+            valtype_for_arg = valtypes[arg]
+            getattr(self, valtype_for_arg)[arg] = val
+            self.indices[arg] = param_index
+            self._arg2scopenum[arg] = scopenum
+        self._idlist.append(id)
+        self.marks.extend(normalize_mark_list(marks))
+
+    def setall(self, funcargs, id, param):
+        for x in funcargs:
+            self._checkargnotcontained(x)
+        self.funcargs.update(funcargs)
+        if id is not NOTSET:
+            self._idlist.append(id)
+        if param is not NOTSET:
+            assert self._globalparam is NOTSET
+            self._globalparam = param
+        for arg in funcargs:
+            self._arg2scopenum[arg] = fixtures.scopenum_function
+
+
+class Metafunc(fixtures.FuncargnamesCompatAttr):
+    """
+    Metafunc objects are passed to the :func:`pytest_generate_tests <_pytest.hookspec.pytest_generate_tests>` hook.
+    They help to inspect a test function and to generate tests according to
+    test configuration or values specified in the class or module where a
+    test function is defined.
+    """
+
+    def __init__(self, definition, fixtureinfo, config, cls=None, module=None):
+        assert (
+            isinstance(definition, FunctionDefinition)
+            or type(definition).__name__ == "DefinitionMock"
+        )
+        self.definition = definition
+
+        #: access to the :class:`_pytest.config.Config` object for the test session
+        self.config = config
+
+        #: the module object where the test function is defined in.
+        self.module = module
+
+        #: underlying python test function
+        self.function = definition.obj
+
+        #: set of fixture names required by the test function
+        self.fixturenames = fixtureinfo.names_closure
+
+        #: class object where the test function is defined in or ``None``.
+        self.cls = cls
+
+        self._calls = []
+        self._ids = set()
+        self._arg2fixturedefs = fixtureinfo.name2fixturedefs
+
+    def parametrize(self, argnames, argvalues, indirect=False, ids=None, scope=None):
+        """ Add new invocations to the underlying test function using the list
+        of argvalues for the given argnames.  Parametrization is performed
+        during the collection phase.  If you need to setup expensive resources
+        see about setting indirect to do it rather at test setup time.
+
+        :arg argnames: a comma-separated string denoting one or more argument
+                       names, or a list/tuple of argument strings.
+
+        :arg argvalues: The list of argvalues determines how often a
+            test is invoked with different argument values.  If only one
+            argname was specified argvalues is a list of values.  If N
+            argnames were specified, argvalues must be a list of N-tuples,
+            where each tuple-element specifies a value for its respective
+            argname.
+
+        :arg indirect: The list of argnames or boolean. A list of arguments'
+            names (subset of argnames). If True the list contains all names from
+            the argnames. Each argvalue corresponding to an argname in this list will
+            be passed as request.param to its respective argname fixture
+            function so that it can perform more expensive setups during the
+            setup phase of a test rather than at collection time.
+
+        :arg ids: list of string ids, or a callable.
+            If strings, each is corresponding to the argvalues so that they are
+            part of the test id. If None is given as id of specific test, the
+            automatically generated id for that argument will be used.
+            If callable, it should take one argument (a single argvalue) and return
+            a string or return None. If None, the automatically generated id for that
+            argument will be used.
+            If no ids are provided they will be generated automatically from
+            the argvalues.
+
+        :arg scope: if specified it denotes the scope of the parameters.
+            The scope is used for grouping tests by parameter instances.
+            It will also override any fixture-function defined scope, allowing
+            to set a dynamic scope using test context or configuration.
+        """
+        from _pytest.fixtures import scope2index
+        from _pytest.mark import ParameterSet
+
+        argnames, parameters = ParameterSet._for_parametrize(
+            argnames,
+            argvalues,
+            self.function,
+            self.config,
+            function_definition=self.definition,
+        )
+        del argvalues
+
+        if scope is None:
+            scope = _find_parametrized_scope(argnames, self._arg2fixturedefs, indirect)
+
+        self._validate_if_using_arg_names(argnames, indirect)
+
+        arg_values_types = self._resolve_arg_value_types(argnames, indirect)
+
+        ids = self._resolve_arg_ids(argnames, ids, parameters, item=self.definition)
+
+        scopenum = scope2index(
+            scope, descr="parametrize() call in {}".format(self.function.__name__)
+        )
+
+        # create the new calls: if we are parametrize() multiple times (by applying the decorator
+        # more than once) then we accumulate those calls generating the cartesian product
+        # of all calls
+        newcalls = []
+        for callspec in self._calls or [CallSpec2(self)]:
+            for param_index, (param_id, param_set) in enumerate(zip(ids, parameters)):
+                newcallspec = callspec.copy()
+                newcallspec.setmulti2(
+                    arg_values_types,
+                    argnames,
+                    param_set.values,
+                    param_id,
+                    param_set.marks,
+                    scopenum,
+                    param_index,
+                )
+                newcalls.append(newcallspec)
+        self._calls = newcalls
+
+    def _resolve_arg_ids(self, argnames, ids, parameters, item):
+        """Resolves the actual ids for the given argnames, based on the ``ids`` parameter given
+        to ``parametrize``.
+
+        :param List[str] argnames: list of argument names passed to ``parametrize()``.
+        :param ids: the ids parameter of the parametrized call (see docs).
+        :param List[ParameterSet] parameters: the list of parameter values, same size as ``argnames``.
+        :param Item item: the item that generated this parametrized call.
+        :rtype: List[str]
+        :return: the list of ids for each argname given
+        """
+        from _pytest._io.saferepr import saferepr
+
+        idfn = None
+        if callable(ids):
+            idfn = ids
+            ids = None
+        if ids:
+            func_name = self.function.__name__
+            if len(ids) != len(parameters):
+                msg = "In {}: {} parameter sets specified, with different number of ids: {}"
+                fail(msg.format(func_name, len(parameters), len(ids)), pytrace=False)
+            for id_value in ids:
+                if id_value is not None and not isinstance(id_value, six.string_types):
+                    msg = "In {}: ids must be list of strings, found: {} (type: {!r})"
+                    fail(
+                        msg.format(func_name, saferepr(id_value), type(id_value)),
+                        pytrace=False,
+                    )
+        ids = idmaker(argnames, parameters, idfn, ids, self.config, item=item)
+        return ids
+
+    def _resolve_arg_value_types(self, argnames, indirect):
+        """Resolves if each parametrized argument must be considered a parameter to a fixture or a "funcarg"
+        to the function, based on the ``indirect`` parameter of the parametrized() call.
+
+        :param List[str] argnames: list of argument names passed to ``parametrize()``.
+        :param indirect: same ``indirect`` parameter of ``parametrize()``.
+        :rtype: Dict[str, str]
+            A dict mapping each arg name to either:
+            * "params" if the argname should be the parameter of a fixture of the same name.
+            * "funcargs" if the argname should be a parameter to the parametrized test function.
+        """
+        valtypes = {}
+        if indirect is True:
+            valtypes = dict.fromkeys(argnames, "params")
+        elif indirect is False:
+            valtypes = dict.fromkeys(argnames, "funcargs")
+        elif isinstance(indirect, (tuple, list)):
+            valtypes = dict.fromkeys(argnames, "funcargs")
+            for arg in indirect:
+                if arg not in argnames:
+                    fail(
+                        "In {}: indirect fixture '{}' doesn't exist".format(
+                            self.function.__name__, arg
+                        ),
+                        pytrace=False,
+                    )
+                valtypes[arg] = "params"
+        return valtypes
+
+    def _validate_if_using_arg_names(self, argnames, indirect):
+        """
+        Check if all argnames are being used, by default values, or directly/indirectly.
+
+        :param List[str] argnames: list of argument names passed to ``parametrize()``.
+        :param indirect: same ``indirect`` parameter of ``parametrize()``.
+        :raise ValueError: if validation fails.
+        """
+        default_arg_names = set(get_default_arg_names(self.function))
+        func_name = self.function.__name__
+        for arg in argnames:
+            if arg not in self.fixturenames:
+                if arg in default_arg_names:
+                    fail(
+                        "In {}: function already takes an argument '{}' with a default value".format(
+                            func_name, arg
+                        ),
+                        pytrace=False,
+                    )
+                else:
+                    if isinstance(indirect, (tuple, list)):
+                        name = "fixture" if arg in indirect else "argument"
+                    else:
+                        name = "fixture" if indirect else "argument"
+                    fail(
+                        "In {}: function uses no {} '{}'".format(func_name, name, arg),
+                        pytrace=False,
+                    )
+
+
+def _find_parametrized_scope(argnames, arg2fixturedefs, indirect):
+    """Find the most appropriate scope for a parametrized call based on its arguments.
+
+    When there's at least one direct argument, always use "function" scope.
+
+    When a test function is parametrized and all its arguments are indirect
+    (e.g. fixtures), return the most narrow scope based on the fixtures used.
+
+    Related to issue #1832, based on code posted by @Kingdread.
+    """
+    from _pytest.fixtures import scopes
+
+    if isinstance(indirect, (list, tuple)):
+        all_arguments_are_fixtures = len(indirect) == len(argnames)
+    else:
+        all_arguments_are_fixtures = bool(indirect)
+
+    if all_arguments_are_fixtures:
+        fixturedefs = arg2fixturedefs or {}
+        used_scopes = [
+            fixturedef[0].scope
+            for name, fixturedef in fixturedefs.items()
+            if name in argnames
+        ]
+        if used_scopes:
+            # Takes the most narrow scope from used fixtures
+            for scope in reversed(scopes):
+                if scope in used_scopes:
+                    return scope
+
+    return "function"
+
+
+def _ascii_escaped_by_config(val, config):
+    if config is None:
+        escape_option = False
+    else:
+        escape_option = config.getini(
+            "disable_test_id_escaping_and_forfeit_all_rights_to_community_support"
+        )
+    return val if escape_option else ascii_escaped(val)
+
+
+def _idval(val, argname, idx, idfn, item, config):
+    if idfn:
+        try:
+            generated_id = idfn(val)
+            if generated_id is not None:
+                val = generated_id
+        except Exception as e:
+            # See issue https://github.com/pytest-dev/pytest/issues/2169
+            msg = "{}: error raised while trying to determine id of parameter '{}' at position {}\n"
+            msg = msg.format(item.nodeid, argname, idx)
+            # we only append the exception type and message because on Python 2 reraise does nothing
+            msg += "  {}: {}\n".format(type(e).__name__, e)
+            six.raise_from(ValueError(msg), e)
+    elif config:
+        hook_id = config.hook.pytest_make_parametrize_id(
+            config=config, val=val, argname=argname
+        )
+        if hook_id:
+            return hook_id
+
+    if isinstance(val, STRING_TYPES):
+        return _ascii_escaped_by_config(val, config)
+    elif val is None or isinstance(val, (float, int, bool)):
+        return str(val)
+    elif isinstance(val, REGEX_TYPE):
+        return ascii_escaped(val.pattern)
+    elif enum is not None and isinstance(val, enum.Enum):
+        return str(val)
+    elif (isclass(val) or isfunction(val)) and hasattr(val, "__name__"):
+        return val.__name__
+    return str(argname) + str(idx)
+
+
+def limit_idval(limit):
+    import functools
+
+    names = {}
+    limit -= 6
+    assert limit > 0
+
+    def decorator(func):
+        @functools.wraps(func)
+        def wrapper(*args, **kw):
+            idval = func(*args, **kw)
+            if len(idval) > limit:
+                prefix = idval[:limit]
+                # There might be same prefix for the different test cases - take item into account
+                name = "{}-{}".format(kw.get('item', ''), safe_str(prefix))
+                idx = names.setdefault(name, -1) + 1
+                names[name] = idx
+                idval = "{}-{}".format(safe_str(prefix), idx)
+            return idval
+
+        return wrapper
+
+    return decorator
+
+
+# XXX limit testnames in the name of sanity and readability
+@limit_idval(limit=500)
+def _idvalset(idx, parameterset, argnames, idfn, ids, item, config):
+    if parameterset.id is not None:
+        return parameterset.id
+    if ids is None or (idx >= len(ids) or ids[idx] is None):
+        this_id = [
+            _idval(val, argname, idx, idfn, item=item, config=config)
+            for val, argname in zip(parameterset.values, argnames)
+        ]
+        return "-".join(this_id)
+    else:
+        return _ascii_escaped_by_config(ids[idx], config)
+
+
+def idmaker(argnames, parametersets, idfn=None, ids=None, config=None, item=None):
+    ids = [
+        _idvalset(valindex, parameterset, argnames, idfn, ids, config=config, item=item)
+        for valindex, parameterset in enumerate(parametersets)
+    ]
+    if len(set(ids)) != len(ids):
+        # The ids are not unique
+        duplicates = [testid for testid in ids if ids.count(testid) > 1]
+        counters = collections.defaultdict(lambda: 0)
+        for index, testid in enumerate(ids):
+            if testid in duplicates:
+                ids[index] = testid + str(counters[testid])
+                counters[testid] += 1
+    return ids
+
+
+def show_fixtures_per_test(config):
+    from _pytest.main import wrap_session
+
+    return wrap_session(config, _show_fixtures_per_test)
+
+
+def _show_fixtures_per_test(config, session):
+    import _pytest.config
+
+    session.perform_collect()
+    curdir = py.path.local()
+    tw = _pytest.config.create_terminal_writer(config)
+    verbose = config.getvalue("verbose")
+
+    def get_best_relpath(func):
+        loc = getlocation(func, curdir)
+        return curdir.bestrelpath(loc)
+
+    def write_fixture(fixture_def):
+        argname = fixture_def.argname
+        if verbose <= 0 and argname.startswith("_"):
+            return
+        if verbose > 0:
+            bestrel = get_best_relpath(fixture_def.func)
+            funcargspec = "{} -- {}".format(argname, bestrel)
+        else:
+            funcargspec = argname
+        tw.line(funcargspec, green=True)
+        fixture_doc = fixture_def.func.__doc__
+        if fixture_doc:
+            write_docstring(tw, fixture_doc)
+        else:
+            tw.line("    no docstring available", red=True)
+
+    def write_item(item):
+        try:
+            info = item._fixtureinfo
+        except AttributeError:
+            # doctests items have no _fixtureinfo attribute
+            return
+        if not info.name2fixturedefs:
+            # this test item does not use any fixtures
+            return
+        tw.line()
+        tw.sep("-", "fixtures used by {}".format(item.name))
+        tw.sep("-", "({})".format(get_best_relpath(item.function)))
+        # dict key not used in loop but needed for sorting
+        for _, fixturedefs in sorted(info.name2fixturedefs.items()):
+            assert fixturedefs is not None
+            if not fixturedefs:
+                continue
+            # last item is expected to be the one used by the test item
+            write_fixture(fixturedefs[-1])
+
+    for session_item in session.items:
+        write_item(session_item)
+
+
+def showfixtures(config):
+    from _pytest.main import wrap_session
+
+    return wrap_session(config, _showfixtures_main)
+
+
+def _showfixtures_main(config, session):
+    import _pytest.config
+
+    session.perform_collect()
+    curdir = py.path.local()
+    tw = _pytest.config.create_terminal_writer(config)
+    verbose = config.getvalue("verbose")
+
+    fm = session._fixturemanager
+
+    available = []
+    seen = set()
+
+    for argname, fixturedefs in fm._arg2fixturedefs.items():
+        assert fixturedefs is not None
+        if not fixturedefs:
+            continue
+        for fixturedef in fixturedefs:
+            loc = getlocation(fixturedef.func, curdir)
+            if (fixturedef.argname, loc) in seen:
+                continue
+            seen.add((fixturedef.argname, loc))
+            available.append(
+                (
+                    len(fixturedef.baseid),
+                    fixturedef.func.__module__,
+                    curdir.bestrelpath(loc),
+                    fixturedef.argname,
+                    fixturedef,
+                )
+            )
+
+    available.sort()
+    currentmodule = None
+    for baseid, module, bestrel, argname, fixturedef in available:
+        if currentmodule != module:
+            if not module.startswith("_pytest."):
+                tw.line()
+                tw.sep("-", "fixtures defined from %s" % (module,))
+                currentmodule = module
+        if verbose <= 0 and argname[0] == "_":
+            continue
+        tw.write(argname, green=True)
+        if fixturedef.scope != "function":
+            tw.write(" [%s scope]" % fixturedef.scope, cyan=True)
+        if verbose > 0:
+            tw.write(" -- %s" % bestrel, yellow=True)
+        tw.write("\n")
+        loc = getlocation(fixturedef.func, curdir)
+        doc = fixturedef.func.__doc__ or ""
+        if doc:
+            write_docstring(tw, doc)
+        else:
+            tw.line("    %s: no docstring available" % (loc,), red=True)
+        tw.line()
+
+
+def write_docstring(tw, doc, indent="    "):
+    doc = doc.rstrip()
+    if "\n" in doc:
+        firstline, rest = doc.split("\n", 1)
+    else:
+        firstline, rest = doc, ""
+
+    if firstline.strip():
+        tw.line(indent + firstline.strip())
+
+    if rest:
+        for line in dedent(rest).split("\n"):
+            tw.write(indent + line + "\n")
+
+
+class Function(FunctionMixin, nodes.Item, fixtures.FuncargnamesCompatAttr):
+    """ a Function Item is responsible for setting up and executing a
+    Python test function.
+    """
+
+    # disable since functions handle it themselves
+    _ALLOW_MARKERS = False
+
+    def __init__(
+        self,
+        name,
+        parent,
+        args=None,
+        config=None,
+        callspec=None,
+        callobj=NOTSET,
+        keywords=None,
+        session=None,
+        fixtureinfo=None,
+        originalname=None,
+    ):
+        super(Function, self).__init__(name, parent, config=config, session=session)
+        self._args = args
+        if callobj is not NOTSET:
+            self.obj = callobj
+
+        self.keywords.update(self.obj.__dict__)
+        self.own_markers.extend(get_unpacked_marks(self.obj))
+        if callspec:
+            self.callspec = callspec
+            # this is total hostile and a mess
+            # keywords are broken by design by now
+            # this will be redeemed later
+            for mark in callspec.marks:
+                # feel free to cry, this was broken for years before
+                # and keywords cant fix it per design
+                self.keywords[mark.name] = mark
+            self.own_markers.extend(normalize_mark_list(callspec.marks))
+        if keywords:
+            self.keywords.update(keywords)
+
+        # todo: this is a hell of a hack
+        # https://github.com/pytest-dev/pytest/issues/4569
+
+        self.keywords.update(
+            dict.fromkeys(
+                [
+                    mark.name
+                    for mark in self.iter_markers()
+                    if mark.name not in self.keywords
+                ],
+                True,
+            )
+        )
+
+        if fixtureinfo is None:
+            fixtureinfo = self.session._fixturemanager.getfixtureinfo(
+                self, self.obj, self.cls, funcargs=True
+            )
+        self._fixtureinfo = fixtureinfo
+        self.fixturenames = fixtureinfo.names_closure
+        self._initrequest()
+
+        #: original function name, without any decorations (for example
+        #: parametrization adds a ``"[...]"`` suffix to function names).
+        #:
+        #: .. versionadded:: 3.0
+        self.originalname = originalname
+
+    def _initrequest(self):
+        self.funcargs = {}
+        self._request = fixtures.FixtureRequest(self)
+
+    @property
+    def function(self):
+        "underlying python 'function' object"
+        return getimfunc(self.obj)
+
+    def _getobj(self):
+        name = self.name
+        i = name.find("[")  # parametrization
+        if i != -1:
+            name = name[:i]
+        return getattr(self.parent.obj, name)
+
+    @property
+    def _pyfuncitem(self):
+        "(compatonly) for code expecting pytest-2.2 style request objects"
+        return self
+
+    def runtest(self):
+        """ execute the underlying test function. """
+        self.ihook.pytest_pyfunc_call(pyfuncitem=self)
+
+    def setup(self):
+        super(Function, self).setup()
+        fixtures.fillfixtures(self)
+
+
+class FunctionDefinition(Function):
+    """
+    internal hack until we get actual definition nodes instead of the
+    crappy metafunc hack
+    """
+
+    def runtest(self):
+        raise RuntimeError("function definitions are not supposed to be used")
+
+    setup = runtest
diff --git a/contrib/python/pytest/py2/_pytest/python_api.py b/contrib/python/pytest/py2/_pytest/python_api.py
new file mode 100644
index 0000000000..f6e475c3a2
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/python_api.py
@@ -0,0 +1,743 @@
+# -*- coding: utf-8 -*-
+from __future__ import absolute_import
+
+import math
+import pprint
+import sys
+import warnings
+from decimal import Decimal
+from numbers import Number
+
+from more_itertools.more import always_iterable
+from six.moves import filterfalse
+from six.moves import zip
+
+import _pytest._code
+from _pytest import deprecated
+from _pytest.compat import isclass
+from _pytest.compat import Iterable
+from _pytest.compat import Mapping
+from _pytest.compat import Sized
+from _pytest.compat import STRING_TYPES
+from _pytest.outcomes import fail
+
+BASE_TYPE = (type, STRING_TYPES)
+
+
+def _cmp_raises_type_error(self, other):
+    """__cmp__ implementation which raises TypeError. Used
+    by Approx base classes to implement only == and != and raise a
+    TypeError for other comparisons.
+
+    Needed in Python 2 only, Python 3 all it takes is not implementing the
+    other operators at all.
+    """
+    __tracebackhide__ = True
+    raise TypeError(
+        "Comparison operators other than == and != not supported by approx objects"
+    )
+
+
+def _non_numeric_type_error(value, at):
+    at_str = " at {}".format(at) if at else ""
+    return TypeError(
+        "cannot make approximate comparisons to non-numeric values: {!r} {}".format(
+            value, at_str
+        )
+    )
+
+
+# builtin pytest.approx helper
+
+
+class ApproxBase(object):
+    """
+    Provide shared utilities for making approximate comparisons between numbers
+    or sequences of numbers.
+    """
+
+    # Tell numpy to use our `__eq__` operator instead of its.
+    __array_ufunc__ = None
+    __array_priority__ = 100
+
+    def __init__(self, expected, rel=None, abs=None, nan_ok=False):
+        __tracebackhide__ = True
+        self.expected = expected
+        self.abs = abs
+        self.rel = rel
+        self.nan_ok = nan_ok
+        self._check_type()
+
+    def __repr__(self):
+        raise NotImplementedError
+
+    def __eq__(self, actual):
+        return all(
+            a == self._approx_scalar(x) for a, x in self._yield_comparisons(actual)
+        )
+
+    __hash__ = None
+
+    def __ne__(self, actual):
+        return not (actual == self)
+
+    if sys.version_info[0] == 2:
+        __cmp__ = _cmp_raises_type_error
+
+    def _approx_scalar(self, x):
+        return ApproxScalar(x, rel=self.rel, abs=self.abs, nan_ok=self.nan_ok)
+
+    def _yield_comparisons(self, actual):
+        """
+        Yield all the pairs of numbers to be compared.  This is used to
+        implement the `__eq__` method.
+        """
+        raise NotImplementedError
+
+    def _check_type(self):
+        """
+        Raise a TypeError if the expected value is not a valid type.
+        """
+        # This is only a concern if the expected value is a sequence.  In every
+        # other case, the approx() function ensures that the expected value has
+        # a numeric type.  For this reason, the default is to do nothing.  The
+        # classes that deal with sequences should reimplement this method to
+        # raise if there are any non-numeric elements in the sequence.
+        pass
+
+
+def _recursive_list_map(f, x):
+    if isinstance(x, list):
+        return list(_recursive_list_map(f, xi) for xi in x)
+    else:
+        return f(x)
+
+
+class ApproxNumpy(ApproxBase):
+    """
+    Perform approximate comparisons where the expected value is numpy array.
+    """
+
+    def __repr__(self):
+        list_scalars = _recursive_list_map(self._approx_scalar, self.expected.tolist())
+        return "approx({!r})".format(list_scalars)
+
+    if sys.version_info[0] == 2:
+        __cmp__ = _cmp_raises_type_error
+
+    def __eq__(self, actual):
+        import numpy as np
+
+        # self.expected is supposed to always be an array here
+
+        if not np.isscalar(actual):
+            try:
+                actual = np.asarray(actual)
+            except:  # noqa
+                raise TypeError("cannot compare '{}' to numpy.ndarray".format(actual))
+
+        if not np.isscalar(actual) and actual.shape != self.expected.shape:
+            return False
+
+        return ApproxBase.__eq__(self, actual)
+
+    def _yield_comparisons(self, actual):
+        import numpy as np
+
+        # `actual` can either be a numpy array or a scalar, it is treated in
+        # `__eq__` before being passed to `ApproxBase.__eq__`, which is the
+        # only method that calls this one.
+
+        if np.isscalar(actual):
+            for i in np.ndindex(self.expected.shape):
+                yield actual, self.expected[i].item()
+        else:
+            for i in np.ndindex(self.expected.shape):
+                yield actual[i].item(), self.expected[i].item()
+
+
+class ApproxMapping(ApproxBase):
+    """
+    Perform approximate comparisons where the expected value is a mapping with
+    numeric values (the keys can be anything).
+    """
+
+    def __repr__(self):
+        return "approx({!r})".format(
+            {k: self._approx_scalar(v) for k, v in self.expected.items()}
+        )
+
+    def __eq__(self, actual):
+        if set(actual.keys()) != set(self.expected.keys()):
+            return False
+
+        return ApproxBase.__eq__(self, actual)
+
+    def _yield_comparisons(self, actual):
+        for k in self.expected.keys():
+            yield actual[k], self.expected[k]
+
+    def _check_type(self):
+        __tracebackhide__ = True
+        for key, value in self.expected.items():
+            if isinstance(value, type(self.expected)):
+                msg = "pytest.approx() does not support nested dictionaries: key={!r} value={!r}\n  full mapping={}"
+                raise TypeError(msg.format(key, value, pprint.pformat(self.expected)))
+            elif not isinstance(value, Number):
+                raise _non_numeric_type_error(self.expected, at="key={!r}".format(key))
+
+
+class ApproxSequencelike(ApproxBase):
+    """
+    Perform approximate comparisons where the expected value is a sequence of
+    numbers.
+    """
+
+    def __repr__(self):
+        seq_type = type(self.expected)
+        if seq_type not in (tuple, list, set):
+            seq_type = list
+        return "approx({!r})".format(
+            seq_type(self._approx_scalar(x) for x in self.expected)
+        )
+
+    def __eq__(self, actual):
+        if len(actual) != len(self.expected):
+            return False
+        return ApproxBase.__eq__(self, actual)
+
+    def _yield_comparisons(self, actual):
+        return zip(actual, self.expected)
+
+    def _check_type(self):
+        __tracebackhide__ = True
+        for index, x in enumerate(self.expected):
+            if isinstance(x, type(self.expected)):
+                msg = "pytest.approx() does not support nested data structures: {!r} at index {}\n  full sequence: {}"
+                raise TypeError(msg.format(x, index, pprint.pformat(self.expected)))
+            elif not isinstance(x, Number):
+                raise _non_numeric_type_error(
+                    self.expected, at="index {}".format(index)
+                )
+
+
+class ApproxScalar(ApproxBase):
+    """
+    Perform approximate comparisons where the expected value is a single number.
+    """
+
+    DEFAULT_ABSOLUTE_TOLERANCE = 1e-12
+    DEFAULT_RELATIVE_TOLERANCE = 1e-6
+
+    def __repr__(self):
+        """
+        Return a string communicating both the expected value and the tolerance
+        for the comparison being made, e.g. '1.0 +- 1e-6'.  Use the unicode
+        plus/minus symbol if this is python3 (it's too hard to get right for
+        python2).
+        """
+        if isinstance(self.expected, complex):
+            return str(self.expected)
+
+        # Infinities aren't compared using tolerances, so don't show a
+        # tolerance.
+        if math.isinf(self.expected):
+            return str(self.expected)
+
+        # If a sensible tolerance can't be calculated, self.tolerance will
+        # raise a ValueError.  In this case, display '???'.
+        try:
+            vetted_tolerance = "{:.1e}".format(self.tolerance)
+        except ValueError:
+            vetted_tolerance = "???"
+
+        if sys.version_info[0] == 2:
+            return "{} +- {}".format(self.expected, vetted_tolerance)
+        else:
+            return u"{} \u00b1 {}".format(self.expected, vetted_tolerance)
+
+    def __eq__(self, actual):
+        """
+        Return true if the given value is equal to the expected value within
+        the pre-specified tolerance.
+        """
+        if _is_numpy_array(actual):
+            # Call ``__eq__()`` manually to prevent infinite-recursion with
+            # numpy<1.13.  See #3748.
+            return all(self.__eq__(a) for a in actual.flat)
+
+        # Short-circuit exact equality.
+        if actual == self.expected:
+            return True
+
+        # Allow the user to control whether NaNs are considered equal to each
+        # other or not.  The abs() calls are for compatibility with complex
+        # numbers.
+        if math.isnan(abs(self.expected)):
+            return self.nan_ok and math.isnan(abs(actual))
+
+        # Infinity shouldn't be approximately equal to anything but itself, but
+        # if there's a relative tolerance, it will be infinite and infinity
+        # will seem approximately equal to everything.  The equal-to-itself
+        # case would have been short circuited above, so here we can just
+        # return false if the expected value is infinite.  The abs() call is
+        # for compatibility with complex numbers.
+        if math.isinf(abs(self.expected)):
+            return False
+
+        # Return true if the two numbers are within the tolerance.
+        return abs(self.expected - actual) <= self.tolerance
+
+    __hash__ = None
+
+    @property
+    def tolerance(self):
+        """
+        Return the tolerance for the comparison.  This could be either an
+        absolute tolerance or a relative tolerance, depending on what the user
+        specified or which would be larger.
+        """
+
+        def set_default(x, default):
+            return x if x is not None else default
+
+        # Figure out what the absolute tolerance should be.  ``self.abs`` is
+        # either None or a value specified by the user.
+        absolute_tolerance = set_default(self.abs, self.DEFAULT_ABSOLUTE_TOLERANCE)
+
+        if absolute_tolerance < 0:
+            raise ValueError(
+                "absolute tolerance can't be negative: {}".format(absolute_tolerance)
+            )
+        if math.isnan(absolute_tolerance):
+            raise ValueError("absolute tolerance can't be NaN.")
+
+        # If the user specified an absolute tolerance but not a relative one,
+        # just return the absolute tolerance.
+        if self.rel is None:
+            if self.abs is not None:
+                return absolute_tolerance
+
+        # Figure out what the relative tolerance should be.  ``self.rel`` is
+        # either None or a value specified by the user.  This is done after
+        # we've made sure the user didn't ask for an absolute tolerance only,
+        # because we don't want to raise errors about the relative tolerance if
+        # we aren't even going to use it.
+        relative_tolerance = set_default(
+            self.rel, self.DEFAULT_RELATIVE_TOLERANCE
+        ) * abs(self.expected)
+
+        if relative_tolerance < 0:
+            raise ValueError(
+                "relative tolerance can't be negative: {}".format(absolute_tolerance)
+            )
+        if math.isnan(relative_tolerance):
+            raise ValueError("relative tolerance can't be NaN.")
+
+        # Return the larger of the relative and absolute tolerances.
+        return max(relative_tolerance, absolute_tolerance)
+
+
+class ApproxDecimal(ApproxScalar):
+    """
+    Perform approximate comparisons where the expected value is a decimal.
+    """
+
+    DEFAULT_ABSOLUTE_TOLERANCE = Decimal("1e-12")
+    DEFAULT_RELATIVE_TOLERANCE = Decimal("1e-6")
+
+
+def approx(expected, rel=None, abs=None, nan_ok=False):
+    """
+    Assert that two numbers (or two sets of numbers) are equal to each other
+    within some tolerance.
+
+    Due to the `intricacies of floating-point arithmetic`__, numbers that we
+    would intuitively expect to be equal are not always so::
+
+        >>> 0.1 + 0.2 == 0.3
+        False
+
+    __ https://docs.python.org/3/tutorial/floatingpoint.html
+
+    This problem is commonly encountered when writing tests, e.g. when making
+    sure that floating-point values are what you expect them to be.  One way to
+    deal with this problem is to assert that two floating-point numbers are
+    equal to within some appropriate tolerance::
+
+        >>> abs((0.1 + 0.2) - 0.3) < 1e-6
+        True
+
+    However, comparisons like this are tedious to write and difficult to
+    understand.  Furthermore, absolute comparisons like the one above are
+    usually discouraged because there's no tolerance that works well for all
+    situations.  ``1e-6`` is good for numbers around ``1``, but too small for
+    very big numbers and too big for very small ones.  It's better to express
+    the tolerance as a fraction of the expected value, but relative comparisons
+    like that are even more difficult to write correctly and concisely.
+
+    The ``approx`` class performs floating-point comparisons using a syntax
+    that's as intuitive as possible::
+
+        >>> from pytest import approx
+        >>> 0.1 + 0.2 == approx(0.3)
+        True
+
+    The same syntax also works for sequences of numbers::
+
+        >>> (0.1 + 0.2, 0.2 + 0.4) == approx((0.3, 0.6))
+        True
+
+    Dictionary *values*::
+
+        >>> {'a': 0.1 + 0.2, 'b': 0.2 + 0.4} == approx({'a': 0.3, 'b': 0.6})
+        True
+
+    ``numpy`` arrays::
+
+        >>> import numpy as np                                                          # doctest: +SKIP
+        >>> np.array([0.1, 0.2]) + np.array([0.2, 0.4]) == approx(np.array([0.3, 0.6])) # doctest: +SKIP
+        True
+
+    And for a ``numpy`` array against a scalar::
+
+        >>> import numpy as np                                         # doctest: +SKIP
+        >>> np.array([0.1, 0.2]) + np.array([0.2, 0.1]) == approx(0.3) # doctest: +SKIP
+        True
+
+    By default, ``approx`` considers numbers within a relative tolerance of
+    ``1e-6`` (i.e. one part in a million) of its expected value to be equal.
+    This treatment would lead to surprising results if the expected value was
+    ``0.0``, because nothing but ``0.0`` itself is relatively close to ``0.0``.
+    To handle this case less surprisingly, ``approx`` also considers numbers
+    within an absolute tolerance of ``1e-12`` of its expected value to be
+    equal.  Infinity and NaN are special cases.  Infinity is only considered
+    equal to itself, regardless of the relative tolerance.  NaN is not
+    considered equal to anything by default, but you can make it be equal to
+    itself by setting the ``nan_ok`` argument to True.  (This is meant to
+    facilitate comparing arrays that use NaN to mean "no data".)
+
+    Both the relative and absolute tolerances can be changed by passing
+    arguments to the ``approx`` constructor::
+
+        >>> 1.0001 == approx(1)
+        False
+        >>> 1.0001 == approx(1, rel=1e-3)
+        True
+        >>> 1.0001 == approx(1, abs=1e-3)
+        True
+
+    If you specify ``abs`` but not ``rel``, the comparison will not consider
+    the relative tolerance at all.  In other words, two numbers that are within
+    the default relative tolerance of ``1e-6`` will still be considered unequal
+    if they exceed the specified absolute tolerance.  If you specify both
+    ``abs`` and ``rel``, the numbers will be considered equal if either
+    tolerance is met::
+
+        >>> 1 + 1e-8 == approx(1)
+        True
+        >>> 1 + 1e-8 == approx(1, abs=1e-12)
+        False
+        >>> 1 + 1e-8 == approx(1, rel=1e-6, abs=1e-12)
+        True
+
+    If you're thinking about using ``approx``, then you might want to know how
+    it compares to other good ways of comparing floating-point numbers.  All of
+    these algorithms are based on relative and absolute tolerances and should
+    agree for the most part, but they do have meaningful differences:
+
+    - ``math.isclose(a, b, rel_tol=1e-9, abs_tol=0.0)``:  True if the relative
+      tolerance is met w.r.t. either ``a`` or ``b`` or if the absolute
+      tolerance is met.  Because the relative tolerance is calculated w.r.t.
+      both ``a`` and ``b``, this test is symmetric (i.e.  neither ``a`` nor
+      ``b`` is a "reference value").  You have to specify an absolute tolerance
+      if you want to compare to ``0.0`` because there is no tolerance by
+      default.  Only available in python>=3.5.  `More information...`__
+
+      __ https://docs.python.org/3/library/math.html#math.isclose
+
+    - ``numpy.isclose(a, b, rtol=1e-5, atol=1e-8)``: True if the difference
+      between ``a`` and ``b`` is less that the sum of the relative tolerance
+      w.r.t. ``b`` and the absolute tolerance.  Because the relative tolerance
+      is only calculated w.r.t. ``b``, this test is asymmetric and you can
+      think of ``b`` as the reference value.  Support for comparing sequences
+      is provided by ``numpy.allclose``.  `More information...`__
+
+      __ http://docs.scipy.org/doc/numpy-1.10.0/reference/generated/numpy.isclose.html
+
+    - ``unittest.TestCase.assertAlmostEqual(a, b)``: True if ``a`` and ``b``
+      are within an absolute tolerance of ``1e-7``.  No relative tolerance is
+      considered and the absolute tolerance cannot be changed, so this function
+      is not appropriate for very large or very small numbers.  Also, it's only
+      available in subclasses of ``unittest.TestCase`` and it's ugly because it
+      doesn't follow PEP8.  `More information...`__
+
+      __ https://docs.python.org/3/library/unittest.html#unittest.TestCase.assertAlmostEqual
+
+    - ``a == pytest.approx(b, rel=1e-6, abs=1e-12)``: True if the relative
+      tolerance is met w.r.t. ``b`` or if the absolute tolerance is met.
+      Because the relative tolerance is only calculated w.r.t. ``b``, this test
+      is asymmetric and you can think of ``b`` as the reference value.  In the
+      special case that you explicitly specify an absolute tolerance but not a
+      relative tolerance, only the absolute tolerance is considered.
+
+    .. warning::
+
+       .. versionchanged:: 3.2
+
+       In order to avoid inconsistent behavior, ``TypeError`` is
+       raised for ``>``, ``>=``, ``<`` and ``<=`` comparisons.
+       The example below illustrates the problem::
+
+           assert approx(0.1) > 0.1 + 1e-10  # calls approx(0.1).__gt__(0.1 + 1e-10)
+           assert 0.1 + 1e-10 > approx(0.1)  # calls approx(0.1).__lt__(0.1 + 1e-10)
+
+       In the second example one expects ``approx(0.1).__le__(0.1 + 1e-10)``
+       to be called. But instead, ``approx(0.1).__lt__(0.1 + 1e-10)`` is used to
+       comparison. This is because the call hierarchy of rich comparisons
+       follows a fixed behavior. `More information...`__
+
+       __ https://docs.python.org/3/reference/datamodel.html#object.__ge__
+    """
+
+    # Delegate the comparison to a class that knows how to deal with the type
+    # of the expected value (e.g. int, float, list, dict, numpy.array, etc).
+    #
+    # The primary responsibility of these classes is to implement ``__eq__()``
+    # and ``__repr__()``.  The former is used to actually check if some
+    # "actual" value is equivalent to the given expected value within the
+    # allowed tolerance.  The latter is used to show the user the expected
+    # value and tolerance, in the case that a test failed.
+    #
+    # The actual logic for making approximate comparisons can be found in
+    # ApproxScalar, which is used to compare individual numbers.  All of the
+    # other Approx classes eventually delegate to this class.  The ApproxBase
+    # class provides some convenient methods and overloads, but isn't really
+    # essential.
+
+    __tracebackhide__ = True
+
+    if isinstance(expected, Decimal):
+        cls = ApproxDecimal
+    elif isinstance(expected, Number):
+        cls = ApproxScalar
+    elif isinstance(expected, Mapping):
+        cls = ApproxMapping
+    elif _is_numpy_array(expected):
+        cls = ApproxNumpy
+    elif (
+        isinstance(expected, Iterable)
+        and isinstance(expected, Sized)
+        and not isinstance(expected, STRING_TYPES)
+    ):
+        cls = ApproxSequencelike
+    else:
+        raise _non_numeric_type_error(expected, at=None)
+
+    return cls(expected, rel, abs, nan_ok)
+
+
+def _is_numpy_array(obj):
+    """
+    Return true if the given object is a numpy array.  Make a special effort to
+    avoid importing numpy unless it's really necessary.
+    """
+    import sys
+
+    np = sys.modules.get("numpy")
+    if np is not None:
+        return isinstance(obj, np.ndarray)
+    return False
+
+
+# builtin pytest.raises helper
+
+
+def raises(expected_exception, *args, **kwargs):
+    r"""
+    Assert that a code block/function call raises ``expected_exception``
+    or raise a failure exception otherwise.
+
+    :kwparam match: if specified, a string containing a regular expression,
+        or a regular expression object, that is tested against the string
+        representation of the exception using ``re.search``. To match a literal
+        string that may contain `special characters`__, the pattern can
+        first be escaped with ``re.escape``.
+
+    __ https://docs.python.org/3/library/re.html#regular-expression-syntax
+
+    :kwparam message: **(deprecated since 4.1)** if specified, provides a custom failure message
+        if the exception is not raised. See :ref:`the deprecation docs <raises message deprecated>` for a workaround.
+
+    .. currentmodule:: _pytest._code
+
+    Use ``pytest.raises`` as a context manager, which will capture the exception of the given
+    type::
+
+        >>> with raises(ZeroDivisionError):
+        ...    1/0
+
+    If the code block does not raise the expected exception (``ZeroDivisionError`` in the example
+    above), or no exception at all, the check will fail instead.
+
+    You can also use the keyword argument ``match`` to assert that the
+    exception matches a text or regex::
+
+        >>> with raises(ValueError, match='must be 0 or None'):
+        ...     raise ValueError("value must be 0 or None")
+
+        >>> with raises(ValueError, match=r'must be \d+$'):
+        ...     raise ValueError("value must be 42")
+
+    The context manager produces an :class:`ExceptionInfo` object which can be used to inspect the
+    details of the captured exception::
+
+        >>> with raises(ValueError) as exc_info:
+        ...     raise ValueError("value must be 42")
+        >>> assert exc_info.type is ValueError
+        >>> assert exc_info.value.args[0] == "value must be 42"
+
+    .. deprecated:: 4.1
+
+        In the context manager form you may use the keyword argument
+        ``message`` to specify a custom failure message that will be displayed
+        in case the ``pytest.raises`` check fails. This has been deprecated as it
+        is considered error prone as users often mean to use ``match`` instead.
+        See :ref:`the deprecation docs <raises message deprecated>` for a workaround.
+
+    .. note::
+
+       When using ``pytest.raises`` as a context manager, it's worthwhile to
+       note that normal context manager rules apply and that the exception
+       raised *must* be the final line in the scope of the context manager.
+       Lines of code after that, within the scope of the context manager will
+       not be executed. For example::
+
+           >>> value = 15
+           >>> with raises(ValueError) as exc_info:
+           ...     if value > 10:
+           ...         raise ValueError("value must be <= 10")
+           ...     assert exc_info.type is ValueError  # this will not execute
+
+       Instead, the following approach must be taken (note the difference in
+       scope)::
+
+           >>> with raises(ValueError) as exc_info:
+           ...     if value > 10:
+           ...         raise ValueError("value must be <= 10")
+           ...
+           >>> assert exc_info.type is ValueError
+
+    **Using with** ``pytest.mark.parametrize``
+
+    When using :ref:`pytest.mark.parametrize ref`
+    it is possible to parametrize tests such that
+    some runs raise an exception and others do not.
+
+    See :ref:`parametrizing_conditional_raising` for an example.
+
+    **Legacy form**
+
+    It is possible to specify a callable by passing a to-be-called lambda::
+
+        >>> raises(ZeroDivisionError, lambda: 1/0)
+        <ExceptionInfo ...>
+
+    or you can specify an arbitrary callable with arguments::
+
+        >>> def f(x): return 1/x
+        ...
+        >>> raises(ZeroDivisionError, f, 0)
+        <ExceptionInfo ...>
+        >>> raises(ZeroDivisionError, f, x=0)
+        <ExceptionInfo ...>
+
+    The form above is fully supported but discouraged for new code because the
+    context manager form is regarded as more readable and less error-prone.
+
+    .. note::
+        Similar to caught exception objects in Python, explicitly clearing
+        local references to returned ``ExceptionInfo`` objects can
+        help the Python interpreter speed up its garbage collection.
+
+        Clearing those references breaks a reference cycle
+        (``ExceptionInfo`` --> caught exception --> frame stack raising
+        the exception --> current frame stack --> local variables -->
+        ``ExceptionInfo``) which makes Python keep all objects referenced
+        from that cycle (including all local variables in the current
+        frame) alive until the next cyclic garbage collection run. See the
+        official Python ``try`` statement documentation for more detailed
+        information.
+
+    """
+    __tracebackhide__ = True
+    for exc in filterfalse(isclass, always_iterable(expected_exception, BASE_TYPE)):
+        msg = (
+            "exceptions must be old-style classes or"
+            " derived from BaseException, not %s"
+        )
+        raise TypeError(msg % type(exc))
+
+    message = "DID NOT RAISE {}".format(expected_exception)
+    match_expr = None
+
+    if not args:
+        if "message" in kwargs:
+            message = kwargs.pop("message")
+            warnings.warn(deprecated.RAISES_MESSAGE_PARAMETER, stacklevel=2)
+        if "match" in kwargs:
+            match_expr = kwargs.pop("match")
+        if kwargs:
+            msg = "Unexpected keyword arguments passed to pytest.raises: "
+            msg += ", ".join(sorted(kwargs))
+            raise TypeError(msg)
+        return RaisesContext(expected_exception, message, match_expr)
+    elif isinstance(args[0], str):
+        warnings.warn(deprecated.RAISES_EXEC, stacklevel=2)
+        (code,) = args
+        assert isinstance(code, str)
+        frame = sys._getframe(1)
+        loc = frame.f_locals.copy()
+        loc.update(kwargs)
+        # print "raises frame scope: %r" % frame.f_locals
+        try:
+            code = _pytest._code.Source(code).compile(_genframe=frame)
+            exec(code, frame.f_globals, loc)
+            # XXX didn't mean f_globals == f_locals something special?
+            #     this is destroyed here ...
+        except expected_exception:
+            return _pytest._code.ExceptionInfo.from_current()
+    else:
+        func = args[0]
+        try:
+            func(*args[1:], **kwargs)
+        except expected_exception:
+            return _pytest._code.ExceptionInfo.from_current()
+    fail(message)
+
+
+raises.Exception = fail.Exception
+
+
+class RaisesContext(object):
+    def __init__(self, expected_exception, message, match_expr):
+        self.expected_exception = expected_exception
+        self.message = message
+        self.match_expr = match_expr
+        self.excinfo = None
+
+    def __enter__(self):
+        self.excinfo = _pytest._code.ExceptionInfo.for_later()
+        return self.excinfo
+
+    def __exit__(self, *tp):
+        __tracebackhide__ = True
+        if tp[0] is None:
+            fail(self.message)
+        self.excinfo.__init__(tp)
+        suppress_exception = issubclass(self.excinfo.type, self.expected_exception)
+        if sys.version_info[0] == 2 and suppress_exception:
+            sys.exc_clear()
+        if self.match_expr is not None and suppress_exception:
+            self.excinfo.match(self.match_expr)
+        return suppress_exception
diff --git a/contrib/python/pytest/py2/_pytest/recwarn.py b/contrib/python/pytest/py2/_pytest/recwarn.py
new file mode 100644
index 0000000000..7abf2e9355
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/recwarn.py
@@ -0,0 +1,251 @@
+# -*- coding: utf-8 -*-
+""" recording warnings during test function execution. """
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import inspect
+import re
+import sys
+import warnings
+
+import six
+
+import _pytest._code
+from _pytest.deprecated import PYTEST_WARNS_UNKNOWN_KWARGS
+from _pytest.deprecated import WARNS_EXEC
+from _pytest.fixtures import yield_fixture
+from _pytest.outcomes import fail
+
+
+@yield_fixture
+def recwarn():
+    """Return a :class:`WarningsRecorder` instance that records all warnings emitted by test functions.
+
+    See http://docs.python.org/library/warnings.html for information
+    on warning categories.
+    """
+    wrec = WarningsRecorder()
+    with wrec:
+        warnings.simplefilter("default")
+        yield wrec
+
+
+def deprecated_call(func=None, *args, **kwargs):
+    """context manager that can be used to ensure a block of code triggers a
+    ``DeprecationWarning`` or ``PendingDeprecationWarning``::
+
+        >>> import warnings
+        >>> def api_call_v2():
+        ...     warnings.warn('use v3 of this api', DeprecationWarning)
+        ...     return 200
+
+        >>> with deprecated_call():
+        ...    assert api_call_v2() == 200
+
+    ``deprecated_call`` can also be used by passing a function and ``*args`` and ``*kwargs``,
+    in which case it will ensure calling ``func(*args, **kwargs)`` produces one of the warnings
+    types above.
+    """
+    __tracebackhide__ = True
+    if func is not None:
+        args = (func,) + args
+    return warns((DeprecationWarning, PendingDeprecationWarning), *args, **kwargs)
+
+
+def warns(expected_warning, *args, **kwargs):
+    r"""Assert that code raises a particular class of warning.
+
+    Specifically, the parameter ``expected_warning`` can be a warning class or
+    sequence of warning classes, and the inside the ``with`` block must issue a warning of that class or
+    classes.
+
+    This helper produces a list of :class:`warnings.WarningMessage` objects,
+    one for each warning raised.
+
+    This function can be used as a context manager, or any of the other ways
+    ``pytest.raises`` can be used::
+
+        >>> with warns(RuntimeWarning):
+        ...    warnings.warn("my warning", RuntimeWarning)
+
+    In the context manager form you may use the keyword argument ``match`` to assert
+    that the exception matches a text or regex::
+
+        >>> with warns(UserWarning, match='must be 0 or None'):
+        ...     warnings.warn("value must be 0 or None", UserWarning)
+
+        >>> with warns(UserWarning, match=r'must be \d+$'):
+        ...     warnings.warn("value must be 42", UserWarning)
+
+        >>> with warns(UserWarning, match=r'must be \d+$'):
+        ...     warnings.warn("this is not here", UserWarning)
+        Traceback (most recent call last):
+          ...
+        Failed: DID NOT WARN. No warnings of type ...UserWarning... was emitted...
+
+    """
+    __tracebackhide__ = True
+    if not args:
+        match_expr = kwargs.pop("match", None)
+        if kwargs:
+            warnings.warn(
+                PYTEST_WARNS_UNKNOWN_KWARGS.format(args=sorted(kwargs)), stacklevel=2
+            )
+        return WarningsChecker(expected_warning, match_expr=match_expr)
+    elif isinstance(args[0], str):
+        warnings.warn(WARNS_EXEC, stacklevel=2)
+        (code,) = args
+        assert isinstance(code, str)
+        frame = sys._getframe(1)
+        loc = frame.f_locals.copy()
+        loc.update(kwargs)
+
+        with WarningsChecker(expected_warning):
+            code = _pytest._code.Source(code).compile()
+            exec(code, frame.f_globals, loc)
+    else:
+        func = args[0]
+        with WarningsChecker(expected_warning):
+            return func(*args[1:], **kwargs)
+
+
+class WarningsRecorder(warnings.catch_warnings):
+    """A context manager to record raised warnings.
+
+    Adapted from `warnings.catch_warnings`.
+    """
+
+    def __init__(self):
+        super(WarningsRecorder, self).__init__(record=True)
+        self._entered = False
+        self._list = []
+
+    @property
+    def list(self):
+        """The list of recorded warnings."""
+        return self._list
+
+    def __getitem__(self, i):
+        """Get a recorded warning by index."""
+        return self._list[i]
+
+    def __iter__(self):
+        """Iterate through the recorded warnings."""
+        return iter(self._list)
+
+    def __len__(self):
+        """The number of recorded warnings."""
+        return len(self._list)
+
+    def pop(self, cls=Warning):
+        """Pop the first recorded warning, raise exception if not exists."""
+        for i, w in enumerate(self._list):
+            if issubclass(w.category, cls):
+                return self._list.pop(i)
+        __tracebackhide__ = True
+        raise AssertionError("%r not found in warning list" % cls)
+
+    def clear(self):
+        """Clear the list of recorded warnings."""
+        self._list[:] = []
+
+    def __enter__(self):
+        if self._entered:
+            __tracebackhide__ = True
+            raise RuntimeError("Cannot enter %r twice" % self)
+        self._list = super(WarningsRecorder, self).__enter__()
+        warnings.simplefilter("always")
+        # python3 keeps track of a "filter version", when the filters are
+        # updated previously seen warnings can be re-warned.  python2 has no
+        # concept of this so we must reset the warnings registry manually.
+        # trivial patching of `warnings.warn` seems to be enough somehow?
+        if six.PY2:
+
+            def warn(message, category=None, stacklevel=1):
+                # duplicate the stdlib logic due to
+                # bad handing in the c version of warnings
+                if isinstance(message, Warning):
+                    category = message.__class__
+                # Check category argument
+                if category is None:
+                    category = UserWarning
+                assert issubclass(category, Warning)
+
+                # emulate resetting the warn registry
+                f_globals = sys._getframe(stacklevel).f_globals
+                if "__warningregistry__" in f_globals:
+                    orig = f_globals["__warningregistry__"]
+                    f_globals["__warningregistry__"] = None
+                    try:
+                        return self._saved_warn(message, category, stacklevel + 1)
+                    finally:
+                        f_globals["__warningregistry__"] = orig
+                else:
+                    return self._saved_warn(message, category, stacklevel + 1)
+
+            warnings.warn, self._saved_warn = warn, warnings.warn
+        return self
+
+    def __exit__(self, *exc_info):
+        if not self._entered:
+            __tracebackhide__ = True
+            raise RuntimeError("Cannot exit %r without entering first" % self)
+        # see above where `self._saved_warn` is assigned
+        if six.PY2:
+            warnings.warn = self._saved_warn
+        super(WarningsRecorder, self).__exit__(*exc_info)
+
+        # Built-in catch_warnings does not reset entered state so we do it
+        # manually here for this context manager to become reusable.
+        self._entered = False
+
+
+class WarningsChecker(WarningsRecorder):
+    def __init__(self, expected_warning=None, match_expr=None):
+        super(WarningsChecker, self).__init__()
+
+        msg = "exceptions must be old-style classes or derived from Warning, not %s"
+        if isinstance(expected_warning, tuple):
+            for exc in expected_warning:
+                if not inspect.isclass(exc):
+                    raise TypeError(msg % type(exc))
+        elif inspect.isclass(expected_warning):
+            expected_warning = (expected_warning,)
+        elif expected_warning is not None:
+            raise TypeError(msg % type(expected_warning))
+
+        self.expected_warning = expected_warning
+        self.match_expr = match_expr
+
+    def __exit__(self, *exc_info):
+        super(WarningsChecker, self).__exit__(*exc_info)
+
+        __tracebackhide__ = True
+
+        # only check if we're not currently handling an exception
+        if all(a is None for a in exc_info):
+            if self.expected_warning is not None:
+                if not any(issubclass(r.category, self.expected_warning) for r in self):
+                    __tracebackhide__ = True
+                    fail(
+                        "DID NOT WARN. No warnings of type {} was emitted. "
+                        "The list of emitted warnings is: {}.".format(
+                            self.expected_warning, [each.message for each in self]
+                        )
+                    )
+                elif self.match_expr is not None:
+                    for r in self:
+                        if issubclass(r.category, self.expected_warning):
+                            if re.compile(self.match_expr).search(str(r.message)):
+                                break
+                    else:
+                        fail(
+                            "DID NOT WARN. No warnings of type {} matching"
+                            " ('{}') was emitted. The list of emitted warnings"
+                            " is: {}.".format(
+                                self.expected_warning,
+                                self.match_expr,
+                                [each.message for each in self],
+                            )
+                        )
diff --git a/contrib/python/pytest/py2/_pytest/reports.py b/contrib/python/pytest/py2/_pytest/reports.py
new file mode 100644
index 0000000000..0bba6762c3
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/reports.py
@@ -0,0 +1,435 @@
+# -*- coding: utf-8 -*-
+from pprint import pprint
+
+import py
+import six
+
+from _pytest._code.code import ExceptionInfo
+from _pytest._code.code import ReprEntry
+from _pytest._code.code import ReprEntryNative
+from _pytest._code.code import ReprExceptionInfo
+from _pytest._code.code import ReprFileLocation
+from _pytest._code.code import ReprFuncArgs
+from _pytest._code.code import ReprLocals
+from _pytest._code.code import ReprTraceback
+from _pytest._code.code import TerminalRepr
+from _pytest.outcomes import skip
+from _pytest.pathlib import Path
+
+
+def getslaveinfoline(node):
+    try:
+        return node._slaveinfocache
+    except AttributeError:
+        d = node.slaveinfo
+        ver = "%s.%s.%s" % d["version_info"][:3]
+        node._slaveinfocache = s = "[%s] %s -- Python %s %s" % (
+            d["id"],
+            d["sysplatform"],
+            ver,
+            d["executable"],
+        )
+        return s
+
+
+class BaseReport(object):
+    when = None
+    location = None
+
+    def __init__(self, **kw):
+        self.__dict__.update(kw)
+
+    def toterminal(self, out):
+        if hasattr(self, "node"):
+            out.line(getslaveinfoline(self.node))
+
+        longrepr = self.longrepr
+        if longrepr is None:
+            return
+
+        if hasattr(longrepr, "toterminal"):
+            longrepr.toterminal(out)
+        else:
+            try:
+                out.line(longrepr)
+            except UnicodeEncodeError:
+                out.line("<unprintable longrepr>")
+
+    def get_sections(self, prefix):
+        for name, content in self.sections:
+            if name.startswith(prefix):
+                yield prefix, content
+
+    @property
+    def longreprtext(self):
+        """
+        Read-only property that returns the full string representation
+        of ``longrepr``.
+
+        .. versionadded:: 3.0
+        """
+        tw = py.io.TerminalWriter(stringio=True)
+        tw.hasmarkup = False
+        self.toterminal(tw)
+        exc = tw.stringio.getvalue()
+        return exc.strip()
+
+    @property
+    def caplog(self):
+        """Return captured log lines, if log capturing is enabled
+
+        .. versionadded:: 3.5
+        """
+        return "\n".join(
+            content for (prefix, content) in self.get_sections("Captured log")
+        )
+
+    @property
+    def capstdout(self):
+        """Return captured text from stdout, if capturing is enabled
+
+        .. versionadded:: 3.0
+        """
+        return "".join(
+            content for (prefix, content) in self.get_sections("Captured stdout")
+        )
+
+    @property
+    def capstderr(self):
+        """Return captured text from stderr, if capturing is enabled
+
+        .. versionadded:: 3.0
+        """
+        return "".join(
+            content for (prefix, content) in self.get_sections("Captured stderr")
+        )
+
+    passed = property(lambda x: x.outcome == "passed")
+    failed = property(lambda x: x.outcome == "failed")
+    skipped = property(lambda x: x.outcome == "skipped")
+
+    @property
+    def fspath(self):
+        return self.nodeid.split("::")[0]
+
+    @property
+    def count_towards_summary(self):
+        """
+        **Experimental**
+
+        Returns True if this report should be counted towards the totals shown at the end of the
+        test session: "1 passed, 1 failure, etc".
+
+        .. note::
+
+            This function is considered **experimental**, so beware that it is subject to changes
+            even in patch releases.
+        """
+        return True
+
+    @property
+    def head_line(self):
+        """
+        **Experimental**
+
+        Returns the head line shown with longrepr output for this report, more commonly during
+        traceback representation during failures::
+
+            ________ Test.foo ________
+
+
+        In the example above, the head_line is "Test.foo".
+
+        .. note::
+
+            This function is considered **experimental**, so beware that it is subject to changes
+            even in patch releases.
+        """
+        if self.location is not None:
+            fspath, lineno, domain = self.location
+            return domain
+
+    def _get_verbose_word(self, config):
+        _category, _short, verbose = config.hook.pytest_report_teststatus(
+            report=self, config=config
+        )
+        return verbose
+
+    def _to_json(self):
+        """
+        This was originally the serialize_report() function from xdist (ca03269).
+
+        Returns the contents of this report as a dict of builtin entries, suitable for
+        serialization.
+
+        Experimental method.
+        """
+
+        def disassembled_report(rep):
+            reprtraceback = rep.longrepr.reprtraceback.__dict__.copy()
+            reprcrash = rep.longrepr.reprcrash.__dict__.copy()
+
+            new_entries = []
+            for entry in reprtraceback["reprentries"]:
+                entry_data = {
+                    "type": type(entry).__name__,
+                    "data": entry.__dict__.copy(),
+                }
+                for key, value in entry_data["data"].items():
+                    if hasattr(value, "__dict__"):
+                        entry_data["data"][key] = value.__dict__.copy()
+                new_entries.append(entry_data)
+
+            reprtraceback["reprentries"] = new_entries
+
+            return {
+                "reprcrash": reprcrash,
+                "reprtraceback": reprtraceback,
+                "sections": rep.longrepr.sections,
+            }
+
+        d = self.__dict__.copy()
+        if hasattr(self.longrepr, "toterminal"):
+            if hasattr(self.longrepr, "reprtraceback") and hasattr(
+                self.longrepr, "reprcrash"
+            ):
+                d["longrepr"] = disassembled_report(self)
+            else:
+                d["longrepr"] = six.text_type(self.longrepr)
+        else:
+            d["longrepr"] = self.longrepr
+        for name in d:
+            if isinstance(d[name], (py.path.local, Path)):
+                d[name] = str(d[name])
+            elif name == "result":
+                d[name] = None  # for now
+        return d
+
+    @classmethod
+    def _from_json(cls, reportdict):
+        """
+        This was originally the serialize_report() function from xdist (ca03269).
+
+        Factory method that returns either a TestReport or CollectReport, depending on the calling
+        class. It's the callers responsibility to know which class to pass here.
+
+        Experimental method.
+        """
+        if reportdict["longrepr"]:
+            if (
+                "reprcrash" in reportdict["longrepr"]
+                and "reprtraceback" in reportdict["longrepr"]
+            ):
+
+                reprtraceback = reportdict["longrepr"]["reprtraceback"]
+                reprcrash = reportdict["longrepr"]["reprcrash"]
+
+                unserialized_entries = []
+                reprentry = None
+                for entry_data in reprtraceback["reprentries"]:
+                    data = entry_data["data"]
+                    entry_type = entry_data["type"]
+                    if entry_type == "ReprEntry":
+                        reprfuncargs = None
+                        reprfileloc = None
+                        reprlocals = None
+                        if data["reprfuncargs"]:
+                            reprfuncargs = ReprFuncArgs(**data["reprfuncargs"])
+                        if data["reprfileloc"]:
+                            reprfileloc = ReprFileLocation(**data["reprfileloc"])
+                        if data["reprlocals"]:
+                            reprlocals = ReprLocals(data["reprlocals"]["lines"])
+
+                        reprentry = ReprEntry(
+                            lines=data["lines"],
+                            reprfuncargs=reprfuncargs,
+                            reprlocals=reprlocals,
+                            filelocrepr=reprfileloc,
+                            style=data["style"],
+                        )
+                    elif entry_type == "ReprEntryNative":
+                        reprentry = ReprEntryNative(data["lines"])
+                    else:
+                        _report_unserialization_failure(entry_type, cls, reportdict)
+                    unserialized_entries.append(reprentry)
+                reprtraceback["reprentries"] = unserialized_entries
+
+                exception_info = ReprExceptionInfo(
+                    reprtraceback=ReprTraceback(**reprtraceback),
+                    reprcrash=ReprFileLocation(**reprcrash),
+                )
+
+                for section in reportdict["longrepr"]["sections"]:
+                    exception_info.addsection(*section)
+                reportdict["longrepr"] = exception_info
+
+        return cls(**reportdict)
+
+
+def _report_unserialization_failure(type_name, report_class, reportdict):
+    url = "https://github.com/pytest-dev/pytest/issues"
+    stream = py.io.TextIO()
+    pprint("-" * 100, stream=stream)
+    pprint("INTERNALERROR: Unknown entry type returned: %s" % type_name, stream=stream)
+    pprint("report_name: %s" % report_class, stream=stream)
+    pprint(reportdict, stream=stream)
+    pprint("Please report this bug at %s" % url, stream=stream)
+    pprint("-" * 100, stream=stream)
+    raise RuntimeError(stream.getvalue())
+
+
+class TestReport(BaseReport):
+    """ Basic test report object (also used for setup and teardown calls if
+    they fail).
+    """
+
+    __test__ = False
+
+    def __init__(
+        self,
+        nodeid,
+        location,
+        keywords,
+        outcome,
+        longrepr,
+        when,
+        sections=(),
+        duration=0,
+        user_properties=None,
+        **extra
+    ):
+        #: normalized collection node id
+        self.nodeid = nodeid
+
+        #: a (filesystempath, lineno, domaininfo) tuple indicating the
+        #: actual location of a test item - it might be different from the
+        #: collected one e.g. if a method is inherited from a different module.
+        self.location = location
+
+        #: a name -> value dictionary containing all keywords and
+        #: markers associated with a test invocation.
+        self.keywords = keywords
+
+        #: test outcome, always one of "passed", "failed", "skipped".
+        self.outcome = outcome
+
+        #: None or a failure representation.
+        self.longrepr = longrepr
+
+        #: one of 'setup', 'call', 'teardown' to indicate runtest phase.
+        self.when = when
+
+        #: user properties is a list of tuples (name, value) that holds user
+        #: defined properties of the test
+        self.user_properties = list(user_properties or [])
+
+        #: list of pairs ``(str, str)`` of extra information which needs to
+        #: marshallable. Used by pytest to add captured text
+        #: from ``stdout`` and ``stderr``, but may be used by other plugins
+        #: to add arbitrary information to reports.
+        self.sections = list(sections)
+
+        #: time it took to run just the test
+        self.duration = duration
+
+        self.__dict__.update(extra)
+
+    def __repr__(self):
+        return "<%s %r when=%r outcome=%r>" % (
+            self.__class__.__name__,
+            self.nodeid,
+            self.when,
+            self.outcome,
+        )
+
+    @classmethod
+    def from_item_and_call(cls, item, call):
+        """
+        Factory method to create and fill a TestReport with standard item and call info.
+        """
+        when = call.when
+        duration = call.stop - call.start
+        keywords = {x: 1 for x in item.keywords}
+        excinfo = call.excinfo
+        sections = []
+        if not call.excinfo:
+            outcome = "passed"
+            longrepr = None
+        else:
+            if not isinstance(excinfo, ExceptionInfo):
+                outcome = "failed"
+                longrepr = excinfo
+            elif excinfo.errisinstance(skip.Exception):
+                outcome = "skipped"
+                r = excinfo._getreprcrash()
+                longrepr = (str(r.path), r.lineno, r.message)
+            else:
+                outcome = "failed"
+                if call.when == "call":
+                    longrepr = item.repr_failure(excinfo)
+                else:  # exception in setup or teardown
+                    longrepr = item._repr_failure_py(
+                        excinfo, style=item.config.getoption("tbstyle", "auto")
+                    )
+        for rwhen, key, content in item._report_sections:
+            sections.append(("Captured %s %s" % (key, rwhen), content))
+        return cls(
+            item.nodeid,
+            item.location,
+            keywords,
+            outcome,
+            longrepr,
+            when,
+            sections,
+            duration,
+            user_properties=item.user_properties,
+        )
+
+
+class CollectReport(BaseReport):
+    when = "collect"
+
+    def __init__(self, nodeid, outcome, longrepr, result, sections=(), **extra):
+        self.nodeid = nodeid
+        self.outcome = outcome
+        self.longrepr = longrepr
+        self.result = result or []
+        self.sections = list(sections)
+        self.__dict__.update(extra)
+
+    @property
+    def location(self):
+        return (self.fspath, None, self.fspath)
+
+    def __repr__(self):
+        return "<CollectReport %r lenresult=%s outcome=%r>" % (
+            self.nodeid,
+            len(self.result),
+            self.outcome,
+        )
+
+
+class CollectErrorRepr(TerminalRepr):
+    def __init__(self, msg):
+        self.longrepr = msg
+
+    def toterminal(self, out):
+        out.line(self.longrepr, red=True)
+
+
+def pytest_report_to_serializable(report):
+    if isinstance(report, (TestReport, CollectReport)):
+        data = report._to_json()
+        data["_report_type"] = report.__class__.__name__
+        return data
+
+
+def pytest_report_from_serializable(data):
+    if "_report_type" in data:
+        if data["_report_type"] == "TestReport":
+            return TestReport._from_json(data)
+        elif data["_report_type"] == "CollectReport":
+            return CollectReport._from_json(data)
+        assert False, "Unknown report_type unserialize data: {}".format(
+            data["_report_type"]
+        )
diff --git a/contrib/python/pytest/py2/_pytest/resultlog.py b/contrib/python/pytest/py2/_pytest/resultlog.py
new file mode 100644
index 0000000000..bd30b5071e
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/resultlog.py
@@ -0,0 +1,102 @@
+# -*- coding: utf-8 -*-
+""" log machine-parseable test session result information in a plain
+text file.
+"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import os
+
+import py
+
+
+def pytest_addoption(parser):
+    group = parser.getgroup("terminal reporting", "resultlog plugin options")
+    group.addoption(
+        "--resultlog",
+        "--result-log",
+        action="store",
+        metavar="path",
+        default=None,
+        help="DEPRECATED path for machine-readable result log.",
+    )
+
+
+def pytest_configure(config):
+    resultlog = config.option.resultlog
+    # prevent opening resultlog on slave nodes (xdist)
+    if resultlog and not hasattr(config, "slaveinput"):
+        dirname = os.path.dirname(os.path.abspath(resultlog))
+        if not os.path.isdir(dirname):
+            os.makedirs(dirname)
+        logfile = open(resultlog, "w", 1)  # line buffered
+        config._resultlog = ResultLog(config, logfile)
+        config.pluginmanager.register(config._resultlog)
+
+        from _pytest.deprecated import RESULT_LOG
+        from _pytest.warnings import _issue_warning_captured
+
+        _issue_warning_captured(RESULT_LOG, config.hook, stacklevel=2)
+
+
+def pytest_unconfigure(config):
+    resultlog = getattr(config, "_resultlog", None)
+    if resultlog:
+        resultlog.logfile.close()
+        del config._resultlog
+        config.pluginmanager.unregister(resultlog)
+
+
+class ResultLog(object):
+    def __init__(self, config, logfile):
+        self.config = config
+        self.logfile = logfile  # preferably line buffered
+
+    def write_log_entry(self, testpath, lettercode, longrepr):
+        print("%s %s" % (lettercode, testpath), file=self.logfile)
+        for line in longrepr.splitlines():
+            print(" %s" % line, file=self.logfile)
+
+    def log_outcome(self, report, lettercode, longrepr):
+        testpath = getattr(report, "nodeid", None)
+        if testpath is None:
+            testpath = report.fspath
+        self.write_log_entry(testpath, lettercode, longrepr)
+
+    def pytest_runtest_logreport(self, report):
+        if report.when != "call" and report.passed:
+            return
+        res = self.config.hook.pytest_report_teststatus(
+            report=report, config=self.config
+        )
+        code = res[1]
+        if code == "x":
+            longrepr = str(report.longrepr)
+        elif code == "X":
+            longrepr = ""
+        elif report.passed:
+            longrepr = ""
+        elif report.failed:
+            longrepr = str(report.longrepr)
+        elif report.skipped:
+            longrepr = str(report.longrepr[2])
+        self.log_outcome(report, code, longrepr)
+
+    def pytest_collectreport(self, report):
+        if not report.passed:
+            if report.failed:
+                code = "F"
+                longrepr = str(report.longrepr)
+            else:
+                assert report.skipped
+                code = "S"
+                longrepr = "%s:%d: %s" % report.longrepr
+            self.log_outcome(report, code, longrepr)
+
+    def pytest_internalerror(self, excrepr):
+        reprcrash = getattr(excrepr, "reprcrash", None)
+        path = getattr(reprcrash, "path", None)
+        if path is None:
+            path = "cwd:%s" % py.path.local()
+        self.write_log_entry(path, "!", str(excrepr))
diff --git a/contrib/python/pytest/py2/_pytest/runner.py b/contrib/python/pytest/py2/_pytest/runner.py
new file mode 100644
index 0000000000..34ae917738
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/runner.py
@@ -0,0 +1,376 @@
+# -*- coding: utf-8 -*-
+""" basic collect and runtest protocol implementations """
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import bdb
+import os
+import sys
+from time import time
+
+import attr
+import six
+
+from .reports import CollectErrorRepr
+from .reports import CollectReport
+from .reports import TestReport
+from _pytest._code.code import ExceptionInfo
+from _pytest.compat import safe_str
+from _pytest.outcomes import Exit
+from _pytest.outcomes import Skipped
+from _pytest.outcomes import TEST_OUTCOME
+
+#
+# pytest plugin hooks
+
+
+def pytest_addoption(parser):
+    group = parser.getgroup("terminal reporting", "reporting", after="general")
+    group.addoption(
+        "--durations",
+        action="store",
+        type=int,
+        default=None,
+        metavar="N",
+        help="show N slowest setup/test durations (N=0 for all).",
+    ),
+
+
+def pytest_terminal_summary(terminalreporter):
+    durations = terminalreporter.config.option.durations
+    verbose = terminalreporter.config.getvalue("verbose")
+    if durations is None:
+        return
+    tr = terminalreporter
+    dlist = []
+    for replist in tr.stats.values():
+        for rep in replist:
+            if hasattr(rep, "duration"):
+                dlist.append(rep)
+    if not dlist:
+        return
+    dlist.sort(key=lambda x: x.duration)
+    dlist.reverse()
+    if not durations:
+        tr.write_sep("=", "slowest test durations")
+    else:
+        tr.write_sep("=", "slowest %s test durations" % durations)
+        dlist = dlist[:durations]
+
+    for rep in dlist:
+        if verbose < 2 and rep.duration < 0.005:
+            tr.write_line("")
+            tr.write_line("(0.00 durations hidden.  Use -vv to show these durations.)")
+            break
+        tr.write_line("%02.2fs %-8s %s" % (rep.duration, rep.when, rep.nodeid))
+
+
+def pytest_sessionstart(session):
+    session._setupstate = SetupState()
+
+
+def pytest_sessionfinish(session):
+    session._setupstate.teardown_all()
+
+
+def pytest_runtest_protocol(item, nextitem):
+    item.ihook.pytest_runtest_logstart(nodeid=item.nodeid, location=item.location)
+    runtestprotocol(item, nextitem=nextitem)
+    item.ihook.pytest_runtest_logfinish(nodeid=item.nodeid, location=item.location)
+    return True
+
+
+def runtestprotocol(item, log=True, nextitem=None):
+    hasrequest = hasattr(item, "_request")
+    if hasrequest and not item._request:
+        item._initrequest()
+    rep = call_and_report(item, "setup", log)
+    reports = [rep]
+    if rep.passed:
+        if item.config.getoption("setupshow", False):
+            show_test_item(item)
+        if not item.config.getoption("setuponly", False):
+            reports.append(call_and_report(item, "call", log))
+    reports.append(call_and_report(item, "teardown", log, nextitem=nextitem))
+    # after all teardown hooks have been called
+    # want funcargs and request info to go away
+    if hasrequest:
+        item._request = False
+        item.funcargs = None
+    return reports
+
+
+def show_test_item(item):
+    """Show test function, parameters and the fixtures of the test item."""
+    tw = item.config.get_terminal_writer()
+    tw.line()
+    tw.write(" " * 8)
+    tw.write(item._nodeid)
+    used_fixtures = sorted(item._fixtureinfo.name2fixturedefs.keys())
+    if used_fixtures:
+        tw.write(" (fixtures used: {})".format(", ".join(used_fixtures)))
+
+
+def pytest_runtest_setup(item):
+    _update_current_test_var(item, "setup")
+    item.session._setupstate.prepare(item)
+
+
+def pytest_runtest_call(item):
+    _update_current_test_var(item, "call")
+    sys.last_type, sys.last_value, sys.last_traceback = (None, None, None)
+    try:
+        item.runtest()
+    except Exception:
+        # Store trace info to allow postmortem debugging
+        type, value, tb = sys.exc_info()
+        tb = tb.tb_next  # Skip *this* frame
+        sys.last_type = type
+        sys.last_value = value
+        sys.last_traceback = tb
+        del type, value, tb  # Get rid of these in this frame
+        raise
+
+
+def pytest_runtest_teardown(item, nextitem):
+    _update_current_test_var(item, "teardown")
+    item.session._setupstate.teardown_exact(item, nextitem)
+    _update_current_test_var(item, None)
+
+
+def _update_current_test_var(item, when):
+    """
+    Update PYTEST_CURRENT_TEST to reflect the current item and stage.
+
+    If ``when`` is None, delete PYTEST_CURRENT_TEST from the environment.
+    """
+    var_name = "PYTEST_CURRENT_TEST"
+    if when:
+        value = "{} ({})".format(item.nodeid, when)
+        # don't allow null bytes on environment variables (see #2644, #2957)
+        value = value.replace("\x00", "(null)")
+        os.environ[var_name] = value
+    else:
+        os.environ.pop(var_name)
+
+
+def pytest_report_teststatus(report):
+    if report.when in ("setup", "teardown"):
+        if report.failed:
+            #      category, shortletter, verbose-word
+            return "error", "E", "ERROR"
+        elif report.skipped:
+            return "skipped", "s", "SKIPPED"
+        else:
+            return "", "", ""
+
+
+#
+# Implementation
+
+
+def call_and_report(item, when, log=True, **kwds):
+    call = call_runtest_hook(item, when, **kwds)
+    hook = item.ihook
+    report = hook.pytest_runtest_makereport(item=item, call=call)
+    if log:
+        hook.pytest_runtest_logreport(report=report)
+    if check_interactive_exception(call, report):
+        hook.pytest_exception_interact(node=item, call=call, report=report)
+    return report
+
+
+def check_interactive_exception(call, report):
+    return call.excinfo and not (
+        hasattr(report, "wasxfail")
+        or call.excinfo.errisinstance(Skipped)
+        or call.excinfo.errisinstance(bdb.BdbQuit)
+    )
+
+
+def call_runtest_hook(item, when, **kwds):
+    hookname = "pytest_runtest_" + when
+    ihook = getattr(item.ihook, hookname)
+    reraise = (Exit,)
+    if not item.config.getoption("usepdb", False):
+        reraise += (KeyboardInterrupt,)
+    return CallInfo.from_call(
+        lambda: ihook(item=item, **kwds), when=when, reraise=reraise
+    )
+
+
+@attr.s(repr=False)
+class CallInfo(object):
+    """ Result/Exception info a function invocation. """
+
+    _result = attr.ib()
+    # Optional[ExceptionInfo]
+    excinfo = attr.ib()
+    start = attr.ib()
+    stop = attr.ib()
+    when = attr.ib()
+
+    @property
+    def result(self):
+        if self.excinfo is not None:
+            raise AttributeError("{!r} has no valid result".format(self))
+        return self._result
+
+    @classmethod
+    def from_call(cls, func, when, reraise=None):
+        #: context of invocation: one of "setup", "call",
+        #: "teardown", "memocollect"
+        start = time()
+        excinfo = None
+        try:
+            result = func()
+        except:  # noqa
+            excinfo = ExceptionInfo.from_current()
+            if reraise is not None and excinfo.errisinstance(reraise):
+                raise
+            result = None
+        stop = time()
+        return cls(start=start, stop=stop, when=when, result=result, excinfo=excinfo)
+
+    def __repr__(self):
+        if self.excinfo is not None:
+            status = "exception"
+            value = self.excinfo.value
+        else:
+            # TODO: investigate unification
+            value = repr(self._result)
+            status = "result"
+        return "<CallInfo when={when!r} {status}: {value}>".format(
+            when=self.when, value=safe_str(value), status=status
+        )
+
+
+def pytest_runtest_makereport(item, call):
+    return TestReport.from_item_and_call(item, call)
+
+
+def pytest_make_collect_report(collector):
+    call = CallInfo.from_call(lambda: list(collector.collect()), "collect")
+    longrepr = None
+    if not call.excinfo:
+        outcome = "passed"
+    else:
+        from _pytest import nose
+
+        skip_exceptions = (Skipped,) + nose.get_skip_exceptions()
+        if call.excinfo.errisinstance(skip_exceptions):
+            outcome = "skipped"
+            r = collector._repr_failure_py(call.excinfo, "line").reprcrash
+            longrepr = (str(r.path), r.lineno, r.message)
+        else:
+            outcome = "failed"
+            errorinfo = collector.repr_failure(call.excinfo)
+            if not hasattr(errorinfo, "toterminal"):
+                errorinfo = CollectErrorRepr(errorinfo)
+            longrepr = errorinfo
+    rep = CollectReport(
+        collector.nodeid, outcome, longrepr, getattr(call, "result", None)
+    )
+    rep.call = call  # see collect_one_node
+    return rep
+
+
+class SetupState(object):
+    """ shared state for setting up/tearing down test items or collectors. """
+
+    def __init__(self):
+        self.stack = []
+        self._finalizers = {}
+
+    def addfinalizer(self, finalizer, colitem):
+        """ attach a finalizer to the given colitem.
+        if colitem is None, this will add a finalizer that
+        is called at the end of teardown_all().
+        """
+        assert colitem and not isinstance(colitem, tuple)
+        assert callable(finalizer)
+        # assert colitem in self.stack  # some unit tests don't setup stack :/
+        self._finalizers.setdefault(colitem, []).append(finalizer)
+
+    def _pop_and_teardown(self):
+        colitem = self.stack.pop()
+        self._teardown_with_finalization(colitem)
+
+    def _callfinalizers(self, colitem):
+        finalizers = self._finalizers.pop(colitem, None)
+        exc = None
+        while finalizers:
+            fin = finalizers.pop()
+            try:
+                fin()
+            except TEST_OUTCOME:
+                # XXX Only first exception will be seen by user,
+                #     ideally all should be reported.
+                if exc is None:
+                    exc = sys.exc_info()
+        if exc:
+            six.reraise(*exc)
+
+    def _teardown_with_finalization(self, colitem):
+        self._callfinalizers(colitem)
+        if hasattr(colitem, "teardown"):
+            colitem.teardown()
+        for colitem in self._finalizers:
+            assert (
+                colitem is None or colitem in self.stack or isinstance(colitem, tuple)
+            )
+
+    def teardown_all(self):
+        while self.stack:
+            self._pop_and_teardown()
+        for key in list(self._finalizers):
+            self._teardown_with_finalization(key)
+        assert not self._finalizers
+
+    def teardown_exact(self, item, nextitem):
+        needed_collectors = nextitem and nextitem.listchain() or []
+        self._teardown_towards(needed_collectors)
+
+    def _teardown_towards(self, needed_collectors):
+        exc = None
+        while self.stack:
+            if self.stack == needed_collectors[: len(self.stack)]:
+                break
+            try:
+                self._pop_and_teardown()
+            except TEST_OUTCOME:
+                # XXX Only first exception will be seen by user,
+                #     ideally all should be reported.
+                if exc is None:
+                    exc = sys.exc_info()
+        if exc:
+            six.reraise(*exc)
+
+    def prepare(self, colitem):
+        """ setup objects along the collector chain to the test-method
+            and teardown previously setup objects."""
+        needed_collectors = colitem.listchain()
+        self._teardown_towards(needed_collectors)
+
+        # check if the last collection node has raised an error
+        for col in self.stack:
+            if hasattr(col, "_prepare_exc"):
+                six.reraise(*col._prepare_exc)
+        for col in needed_collectors[len(self.stack) :]:
+            self.stack.append(col)
+            try:
+                col.setup()
+            except TEST_OUTCOME:
+                col._prepare_exc = sys.exc_info()
+                raise
+
+
+def collect_one_node(collector):
+    ihook = collector.ihook
+    ihook.pytest_collectstart(collector=collector)
+    rep = ihook.pytest_make_collect_report(collector=collector)
+    call = rep.__dict__.pop("call", None)
+    if call and check_interactive_exception(call, rep):
+        ihook.pytest_exception_interact(node=collector, call=call, report=rep)
+    return rep
diff --git a/contrib/python/pytest/py2/_pytest/setuponly.py b/contrib/python/pytest/py2/_pytest/setuponly.py
new file mode 100644
index 0000000000..0859011241
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/setuponly.py
@@ -0,0 +1,89 @@
+# -*- coding: utf-8 -*-
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import sys
+
+import pytest
+
+
+def pytest_addoption(parser):
+    group = parser.getgroup("debugconfig")
+    group.addoption(
+        "--setuponly",
+        "--setup-only",
+        action="store_true",
+        help="only setup fixtures, do not execute tests.",
+    )
+    group.addoption(
+        "--setupshow",
+        "--setup-show",
+        action="store_true",
+        help="show setup of fixtures while executing tests.",
+    )
+
+
+@pytest.hookimpl(hookwrapper=True)
+def pytest_fixture_setup(fixturedef, request):
+    yield
+    config = request.config
+    if config.option.setupshow:
+        if hasattr(request, "param"):
+            # Save the fixture parameter so ._show_fixture_action() can
+            # display it now and during the teardown (in .finish()).
+            if fixturedef.ids:
+                if callable(fixturedef.ids):
+                    fixturedef.cached_param = fixturedef.ids(request.param)
+                else:
+                    fixturedef.cached_param = fixturedef.ids[request.param_index]
+            else:
+                fixturedef.cached_param = request.param
+        _show_fixture_action(fixturedef, "SETUP")
+
+
+def pytest_fixture_post_finalizer(fixturedef):
+    if hasattr(fixturedef, "cached_result"):
+        config = fixturedef._fixturemanager.config
+        if config.option.setupshow:
+            _show_fixture_action(fixturedef, "TEARDOWN")
+            if hasattr(fixturedef, "cached_param"):
+                del fixturedef.cached_param
+
+
+def _show_fixture_action(fixturedef, msg):
+    config = fixturedef._fixturemanager.config
+    capman = config.pluginmanager.getplugin("capturemanager")
+    if capman:
+        capman.suspend_global_capture()
+        out, err = capman.read_global_capture()
+
+    tw = config.get_terminal_writer()
+    tw.line()
+    tw.write(" " * 2 * fixturedef.scopenum)
+    tw.write(
+        "{step} {scope} {fixture}".format(
+            step=msg.ljust(8),  # align the output to TEARDOWN
+            scope=fixturedef.scope[0].upper(),
+            fixture=fixturedef.argname,
+        )
+    )
+
+    if msg == "SETUP":
+        deps = sorted(arg for arg in fixturedef.argnames if arg != "request")
+        if deps:
+            tw.write(" (fixtures used: {})".format(", ".join(deps)))
+
+    if hasattr(fixturedef, "cached_param"):
+        tw.write("[{}]".format(fixturedef.cached_param))
+
+    if capman:
+        capman.resume_global_capture()
+        sys.stdout.write(out)
+        sys.stderr.write(err)
+
+
+@pytest.hookimpl(tryfirst=True)
+def pytest_cmdline_main(config):
+    if config.option.setuponly:
+        config.option.setupshow = True
diff --git a/contrib/python/pytest/py2/_pytest/setupplan.py b/contrib/python/pytest/py2/_pytest/setupplan.py
new file mode 100644
index 0000000000..47b0fe82ef
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/setupplan.py
@@ -0,0 +1,32 @@
+# -*- coding: utf-8 -*-
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import pytest
+
+
+def pytest_addoption(parser):
+    group = parser.getgroup("debugconfig")
+    group.addoption(
+        "--setupplan",
+        "--setup-plan",
+        action="store_true",
+        help="show what fixtures and tests would be executed but "
+        "don't execute anything.",
+    )
+
+
+@pytest.hookimpl(tryfirst=True)
+def pytest_fixture_setup(fixturedef, request):
+    # Will return a dummy fixture if the setuponly option is provided.
+    if request.config.option.setupplan:
+        fixturedef.cached_result = (None, None, None)
+        return fixturedef.cached_result
+
+
+@pytest.hookimpl(tryfirst=True)
+def pytest_cmdline_main(config):
+    if config.option.setupplan:
+        config.option.setuponly = True
+        config.option.setupshow = True
diff --git a/contrib/python/pytest/py2/_pytest/skipping.py b/contrib/python/pytest/py2/_pytest/skipping.py
new file mode 100644
index 0000000000..bc8b88e717
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/skipping.py
@@ -0,0 +1,186 @@
+# -*- coding: utf-8 -*-
+""" support for skip/xfail functions and markers. """
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+from _pytest.config import hookimpl
+from _pytest.mark.evaluate import MarkEvaluator
+from _pytest.outcomes import fail
+from _pytest.outcomes import skip
+from _pytest.outcomes import xfail
+
+
+def pytest_addoption(parser):
+    group = parser.getgroup("general")
+    group.addoption(
+        "--runxfail",
+        action="store_true",
+        dest="runxfail",
+        default=False,
+        help="report the results of xfail tests as if they were not marked",
+    )
+
+    parser.addini(
+        "xfail_strict",
+        "default for the strict parameter of xfail "
+        "markers when not given explicitly (default: False)",
+        default=False,
+        type="bool",
+    )
+
+
+def pytest_configure(config):
+    if config.option.runxfail:
+        # yay a hack
+        import pytest
+
+        old = pytest.xfail
+        config._cleanup.append(lambda: setattr(pytest, "xfail", old))
+
+        def nop(*args, **kwargs):
+            pass
+
+        nop.Exception = xfail.Exception
+        setattr(pytest, "xfail", nop)
+
+    config.addinivalue_line(
+        "markers",
+        "skip(reason=None): skip the given test function with an optional reason. "
+        'Example: skip(reason="no way of currently testing this") skips the '
+        "test.",
+    )
+    config.addinivalue_line(
+        "markers",
+        "skipif(condition): skip the given test function if eval(condition) "
+        "results in a True value.  Evaluation happens within the "
+        "module global context. Example: skipif('sys.platform == \"win32\"') "
+        "skips the test if we are on the win32 platform. see "
+        "https://docs.pytest.org/en/latest/skipping.html",
+    )
+    config.addinivalue_line(
+        "markers",
+        "xfail(condition, reason=None, run=True, raises=None, strict=False): "
+        "mark the test function as an expected failure if eval(condition) "
+        "has a True value. Optionally specify a reason for better reporting "
+        "and run=False if you don't even want to execute the test function. "
+        "If only specific exception(s) are expected, you can list them in "
+        "raises, and if the test fails in other ways, it will be reported as "
+        "a true failure. See https://docs.pytest.org/en/latest/skipping.html",
+    )
+
+
+@hookimpl(tryfirst=True)
+def pytest_runtest_setup(item):
+    # Check if skip or skipif are specified as pytest marks
+    item._skipped_by_mark = False
+    eval_skipif = MarkEvaluator(item, "skipif")
+    if eval_skipif.istrue():
+        item._skipped_by_mark = True
+        skip(eval_skipif.getexplanation())
+
+    for skip_info in item.iter_markers(name="skip"):
+        item._skipped_by_mark = True
+        if "reason" in skip_info.kwargs:
+            skip(skip_info.kwargs["reason"])
+        elif skip_info.args:
+            skip(skip_info.args[0])
+        else:
+            skip("unconditional skip")
+
+    item._evalxfail = MarkEvaluator(item, "xfail")
+    check_xfail_no_run(item)
+
+
+@hookimpl(hookwrapper=True)
+def pytest_pyfunc_call(pyfuncitem):
+    check_xfail_no_run(pyfuncitem)
+    outcome = yield
+    passed = outcome.excinfo is None
+    if passed:
+        check_strict_xfail(pyfuncitem)
+
+
+def check_xfail_no_run(item):
+    """check xfail(run=False)"""
+    if not item.config.option.runxfail:
+        evalxfail = item._evalxfail
+        if evalxfail.istrue():
+            if not evalxfail.get("run", True):
+                xfail("[NOTRUN] " + evalxfail.getexplanation())
+
+
+def check_strict_xfail(pyfuncitem):
+    """check xfail(strict=True) for the given PASSING test"""
+    evalxfail = pyfuncitem._evalxfail
+    if evalxfail.istrue():
+        strict_default = pyfuncitem.config.getini("xfail_strict")
+        is_strict_xfail = evalxfail.get("strict", strict_default)
+        if is_strict_xfail:
+            del pyfuncitem._evalxfail
+            explanation = evalxfail.getexplanation()
+            fail("[XPASS(strict)] " + explanation, pytrace=False)
+
+
+@hookimpl(hookwrapper=True)
+def pytest_runtest_makereport(item, call):
+    outcome = yield
+    rep = outcome.get_result()
+    evalxfail = getattr(item, "_evalxfail", None)
+    # unitttest special case, see setting of _unexpectedsuccess
+    if hasattr(item, "_unexpectedsuccess") and rep.when == "call":
+        from _pytest.compat import _is_unittest_unexpected_success_a_failure
+
+        if item._unexpectedsuccess:
+            rep.longrepr = "Unexpected success: {}".format(item._unexpectedsuccess)
+        else:
+            rep.longrepr = "Unexpected success"
+        if _is_unittest_unexpected_success_a_failure():
+            rep.outcome = "failed"
+        else:
+            rep.outcome = "passed"
+            rep.wasxfail = rep.longrepr
+    elif item.config.option.runxfail:
+        pass  # don't interefere
+    elif call.excinfo and call.excinfo.errisinstance(xfail.Exception):
+        rep.wasxfail = "reason: " + call.excinfo.value.msg
+        rep.outcome = "skipped"
+    elif evalxfail and not rep.skipped and evalxfail.wasvalid() and evalxfail.istrue():
+        if call.excinfo:
+            if evalxfail.invalidraise(call.excinfo.value):
+                rep.outcome = "failed"
+            else:
+                rep.outcome = "skipped"
+                rep.wasxfail = evalxfail.getexplanation()
+        elif call.when == "call":
+            strict_default = item.config.getini("xfail_strict")
+            is_strict_xfail = evalxfail.get("strict", strict_default)
+            explanation = evalxfail.getexplanation()
+            if is_strict_xfail:
+                rep.outcome = "failed"
+                rep.longrepr = "[XPASS(strict)] {}".format(explanation)
+            else:
+                rep.outcome = "passed"
+                rep.wasxfail = explanation
+    elif (
+        getattr(item, "_skipped_by_mark", False)
+        and rep.skipped
+        and type(rep.longrepr) is tuple
+    ):
+        # skipped by mark.skipif; change the location of the failure
+        # to point to the item definition, otherwise it will display
+        # the location of where the skip exception was raised within pytest
+        filename, line, reason = rep.longrepr
+        filename, line = item.location[:2]
+        rep.longrepr = filename, line, reason
+
+
+# called by terminalreporter progress reporting
+
+
+def pytest_report_teststatus(report):
+    if hasattr(report, "wasxfail"):
+        if report.skipped:
+            return "xfailed", "x", "XFAIL"
+        elif report.passed:
+            return "xpassed", "X", "XPASS"
diff --git a/contrib/python/pytest/py2/_pytest/stepwise.py b/contrib/python/pytest/py2/_pytest/stepwise.py
new file mode 100644
index 0000000000..8890259589
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/stepwise.py
@@ -0,0 +1,109 @@
+# -*- coding: utf-8 -*-
+import pytest
+
+
+def pytest_addoption(parser):
+    group = parser.getgroup("general")
+    group.addoption(
+        "--sw",
+        "--stepwise",
+        action="store_true",
+        dest="stepwise",
+        help="exit on test failure and continue from last failing test next time",
+    )
+    group.addoption(
+        "--stepwise-skip",
+        action="store_true",
+        dest="stepwise_skip",
+        help="ignore the first failing test but stop on the next failing test",
+    )
+
+
+@pytest.hookimpl
+def pytest_configure(config):
+    config.pluginmanager.register(StepwisePlugin(config), "stepwiseplugin")
+
+
+class StepwisePlugin:
+    def __init__(self, config):
+        self.config = config
+        self.active = config.getvalue("stepwise")
+        self.session = None
+        self.report_status = ""
+
+        if self.active:
+            self.lastfailed = config.cache.get("cache/stepwise", None)
+            self.skip = config.getvalue("stepwise_skip")
+
+    def pytest_sessionstart(self, session):
+        self.session = session
+
+    def pytest_collection_modifyitems(self, session, config, items):
+        if not self.active:
+            return
+        if not self.lastfailed:
+            self.report_status = "no previously failed tests, not skipping."
+            return
+
+        already_passed = []
+        found = False
+
+        # Make a list of all tests that have been run before the last failing one.
+        for item in items:
+            if item.nodeid == self.lastfailed:
+                found = True
+                break
+            else:
+                already_passed.append(item)
+
+        # If the previously failed test was not found among the test items,
+        # do not skip any tests.
+        if not found:
+            self.report_status = "previously failed test not found, not skipping."
+            already_passed = []
+        else:
+            self.report_status = "skipping {} already passed items.".format(
+                len(already_passed)
+            )
+
+        for item in already_passed:
+            items.remove(item)
+
+        config.hook.pytest_deselected(items=already_passed)
+
+    def pytest_runtest_logreport(self, report):
+        if not self.active:
+            return
+
+        if report.failed:
+            if self.skip:
+                # Remove test from the failed ones (if it exists) and unset the skip option
+                # to make sure the following tests will not be skipped.
+                if report.nodeid == self.lastfailed:
+                    self.lastfailed = None
+
+                self.skip = False
+            else:
+                # Mark test as the last failing and interrupt the test session.
+                self.lastfailed = report.nodeid
+                self.session.shouldstop = (
+                    "Test failed, continuing from this test next run."
+                )
+
+        else:
+            # If the test was actually run and did pass.
+            if report.when == "call":
+                # Remove test from the failed ones, if exists.
+                if report.nodeid == self.lastfailed:
+                    self.lastfailed = None
+
+    def pytest_report_collectionfinish(self):
+        if self.active and self.config.getoption("verbose") >= 0 and self.report_status:
+            return "stepwise: %s" % self.report_status
+
+    def pytest_sessionfinish(self, session):
+        if self.active:
+            self.config.cache.set("cache/stepwise", self.lastfailed)
+        else:
+            # Clear the list of failing tests if the plugin is not active.
+            self.config.cache.set("cache/stepwise", [])
diff --git a/contrib/python/pytest/py2/_pytest/terminal.py b/contrib/python/pytest/py2/_pytest/terminal.py
new file mode 100644
index 0000000000..4418338c65
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/terminal.py
@@ -0,0 +1,1090 @@
+# -*- coding: utf-8 -*-
+""" terminal reporting of the full testing process.
+
+This is a good source for looking at the various reporting hooks.
+"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import argparse
+import collections
+import platform
+import sys
+import time
+from functools import partial
+
+import attr
+import pluggy
+import py
+import six
+from more_itertools import collapse
+
+import pytest
+from _pytest import nodes
+from _pytest.main import EXIT_INTERRUPTED
+from _pytest.main import EXIT_NOTESTSCOLLECTED
+from _pytest.main import EXIT_OK
+from _pytest.main import EXIT_TESTSFAILED
+from _pytest.main import EXIT_USAGEERROR
+
+REPORT_COLLECTING_RESOLUTION = 0.5
+
+
+class MoreQuietAction(argparse.Action):
+    """
+    a modified copy of the argparse count action which counts down and updates
+    the legacy quiet attribute at the same time
+
+    used to unify verbosity handling
+    """
+
+    def __init__(self, option_strings, dest, default=None, required=False, help=None):
+        super(MoreQuietAction, self).__init__(
+            option_strings=option_strings,
+            dest=dest,
+            nargs=0,
+            default=default,
+            required=required,
+            help=help,
+        )
+
+    def __call__(self, parser, namespace, values, option_string=None):
+        new_count = getattr(namespace, self.dest, 0) - 1
+        setattr(namespace, self.dest, new_count)
+        # todo Deprecate config.quiet
+        namespace.quiet = getattr(namespace, "quiet", 0) + 1
+
+
+def pytest_addoption(parser):
+    group = parser.getgroup("terminal reporting", "reporting", after="general")
+    group._addoption(
+        "-v",
+        "--verbose",
+        action="count",
+        default=0,
+        dest="verbose",
+        help="increase verbosity.",
+    ),
+    group._addoption(
+        "-q",
+        "--quiet",
+        action=MoreQuietAction,
+        default=0,
+        dest="verbose",
+        help="decrease verbosity.",
+    ),
+    group._addoption(
+        "--verbosity", dest="verbose", type=int, default=0, help="set verbosity"
+    )
+    group._addoption(
+        "-r",
+        action="store",
+        dest="reportchars",
+        default="",
+        metavar="chars",
+        help="show extra test summary info as specified by chars: (f)ailed, "
+        "(E)rror, (s)kipped, (x)failed, (X)passed, "
+        "(p)assed, (P)assed with output, (a)ll except passed (p/P), or (A)ll. "
+        "Warnings are displayed at all times except when "
+        "--disable-warnings is set.",
+    )
+    group._addoption(
+        "--disable-warnings",
+        "--disable-pytest-warnings",
+        default=False,
+        dest="disable_warnings",
+        action="store_true",
+        help="disable warnings summary",
+    )
+    group._addoption(
+        "-l",
+        "--showlocals",
+        action="store_true",
+        dest="showlocals",
+        default=False,
+        help="show locals in tracebacks (disabled by default).",
+    )
+    group._addoption(
+        "--tb",
+        metavar="style",
+        action="store",
+        dest="tbstyle",
+        default="auto",
+        choices=["auto", "long", "short", "no", "line", "native"],
+        help="traceback print mode (auto/long/short/line/native/no).",
+    )
+    group._addoption(
+        "--show-capture",
+        action="store",
+        dest="showcapture",
+        choices=["no", "stdout", "stderr", "log", "all"],
+        default="all",
+        help="Controls how captured stdout/stderr/log is shown on failed tests. "
+        "Default is 'all'.",
+    )
+    group._addoption(
+        "--fulltrace",
+        "--full-trace",
+        action="store_true",
+        default=False,
+        help="don't cut any tracebacks (default is to cut).",
+    )
+    group._addoption(
+        "--color",
+        metavar="color",
+        action="store",
+        dest="color",
+        default="auto",
+        choices=["yes", "no", "auto"],
+        help="color terminal output (yes/no/auto).",
+    )
+
+    parser.addini(
+        "console_output_style",
+        help='console output: "classic", or with additional progress information ("progress" (percentage) | "count").',
+        default="progress",
+    )
+
+
+def pytest_configure(config):
+    reporter = TerminalReporter(config, sys.stdout)
+    config.pluginmanager.register(reporter, "terminalreporter")
+    if config.option.debug or config.option.traceconfig:
+
+        def mywriter(tags, args):
+            msg = " ".join(map(str, args))
+            reporter.write_line("[traceconfig] " + msg)
+
+        config.trace.root.setprocessor("pytest:config", mywriter)
+
+
+def getreportopt(config):
+    reportopts = ""
+    reportchars = config.option.reportchars
+    if not config.option.disable_warnings and "w" not in reportchars:
+        reportchars += "w"
+    elif config.option.disable_warnings and "w" in reportchars:
+        reportchars = reportchars.replace("w", "")
+    aliases = {"F", "S"}
+    for char in reportchars:
+        # handle old aliases
+        if char in aliases:
+            char = char.lower()
+        if char == "a":
+            reportopts = "sxXwEf"
+        elif char == "A":
+            reportopts = "PpsxXwEf"
+            break
+        elif char not in reportopts:
+            reportopts += char
+    return reportopts
+
+
+@pytest.hookimpl(trylast=True)  # after _pytest.runner
+def pytest_report_teststatus(report):
+    letter = "F"
+    if report.passed:
+        letter = "."
+    elif report.skipped:
+        letter = "s"
+
+    outcome = report.outcome
+    if report.when in ("collect", "setup", "teardown") and outcome == "failed":
+        outcome = "error"
+        letter = "E"
+
+    return outcome, letter, outcome.upper()
+
+
+@attr.s
+class WarningReport(object):
+    """
+    Simple structure to hold warnings information captured by ``pytest_warning_captured``.
+
+    :ivar str message: user friendly message about the warning
+    :ivar str|None nodeid: node id that generated the warning (see ``get_location``).
+    :ivar tuple|py.path.local fslocation:
+        file system location of the source of the warning (see ``get_location``).
+    """
+
+    message = attr.ib()
+    nodeid = attr.ib(default=None)
+    fslocation = attr.ib(default=None)
+    count_towards_summary = True
+
+    def get_location(self, config):
+        """
+        Returns the more user-friendly information about the location
+        of a warning, or None.
+        """
+        if self.nodeid:
+            return self.nodeid
+        if self.fslocation:
+            if isinstance(self.fslocation, tuple) and len(self.fslocation) >= 2:
+                filename, linenum = self.fslocation[:2]
+                relpath = py.path.local(filename).relto(config.invocation_dir)
+                if not relpath:
+                    relpath = str(filename)
+                return "%s:%s" % (relpath, linenum)
+            else:
+                return str(self.fslocation)
+        return None
+
+
+class TerminalReporter(object):
+    def __init__(self, config, file=None):
+        import _pytest.config
+
+        self.config = config
+        self._numcollected = 0
+        self._session = None
+        self._showfspath = None
+
+        self.stats = {}
+        self.startdir = config.invocation_dir
+        if file is None:
+            file = sys.stdout
+        self._tw = _pytest.config.create_terminal_writer(config, file)
+        # self.writer will be deprecated in pytest-3.4
+        self.writer = self._tw
+        self._screen_width = self._tw.fullwidth
+        self.currentfspath = None
+        self.reportchars = getreportopt(config)
+        self.hasmarkup = self._tw.hasmarkup
+        self.isatty = file.isatty()
+        self._progress_nodeids_reported = set()
+        self._show_progress_info = self._determine_show_progress_info()
+        self._collect_report_last_write = None
+
+    def _determine_show_progress_info(self):
+        """Return True if we should display progress information based on the current config"""
+        # do not show progress if we are not capturing output (#3038)
+        if self.config.getoption("capture", "no") == "no":
+            return False
+        # do not show progress if we are showing fixture setup/teardown
+        if self.config.getoption("setupshow", False):
+            return False
+        cfg = self.config.getini("console_output_style")
+        if cfg in ("progress", "count"):
+            return cfg
+        return False
+
+    @property
+    def verbosity(self):
+        return self.config.option.verbose
+
+    @property
+    def showheader(self):
+        return self.verbosity >= 0
+
+    @property
+    def showfspath(self):
+        if self._showfspath is None:
+            return self.verbosity >= 0
+        return self._showfspath
+
+    @showfspath.setter
+    def showfspath(self, value):
+        self._showfspath = value
+
+    @property
+    def showlongtestinfo(self):
+        return self.verbosity > 0
+
+    def hasopt(self, char):
+        char = {"xfailed": "x", "skipped": "s"}.get(char, char)
+        return char in self.reportchars
+
+    def write_fspath_result(self, nodeid, res, **markup):
+        fspath = self.config.rootdir.join(nodeid.split("::")[0])
+        # NOTE: explicitly check for None to work around py bug, and for less
+        # overhead in general (https://github.com/pytest-dev/py/pull/207).
+        if self.currentfspath is None or fspath != self.currentfspath:
+            if self.currentfspath is not None and self._show_progress_info:
+                self._write_progress_information_filling_space()
+            self.currentfspath = fspath
+            fspath = self.startdir.bestrelpath(fspath)
+            self._tw.line()
+            self._tw.write(fspath + " ")
+        self._tw.write(res, **markup)
+
+    def write_ensure_prefix(self, prefix, extra="", **kwargs):
+        if self.currentfspath != prefix:
+            self._tw.line()
+            self.currentfspath = prefix
+            self._tw.write(prefix)
+        if extra:
+            self._tw.write(extra, **kwargs)
+            self.currentfspath = -2
+
+    def ensure_newline(self):
+        if self.currentfspath:
+            self._tw.line()
+            self.currentfspath = None
+
+    def write(self, content, **markup):
+        self._tw.write(content, **markup)
+
+    def write_line(self, line, **markup):
+        if not isinstance(line, six.text_type):
+            line = six.text_type(line, errors="replace")
+        self.ensure_newline()
+        self._tw.line(line, **markup)
+
+    def rewrite(self, line, **markup):
+        """
+        Rewinds the terminal cursor to the beginning and writes the given line.
+
+        :kwarg erase: if True, will also add spaces until the full terminal width to ensure
+            previous lines are properly erased.
+
+        The rest of the keyword arguments are markup instructions.
+        """
+        erase = markup.pop("erase", False)
+        if erase:
+            fill_count = self._tw.fullwidth - len(line) - 1
+            fill = " " * fill_count
+        else:
+            fill = ""
+        line = str(line)
+        self._tw.write("\r" + line + fill, **markup)
+
+    def write_sep(self, sep, title=None, **markup):
+        self.ensure_newline()
+        self._tw.sep(sep, title, **markup)
+
+    def section(self, title, sep="=", **kw):
+        self._tw.sep(sep, title, **kw)
+
+    def line(self, msg, **kw):
+        self._tw.line(msg, **kw)
+
+    def pytest_internalerror(self, excrepr):
+        for line in six.text_type(excrepr).split("\n"):
+            self.write_line("INTERNALERROR> " + line)
+        return 1
+
+    def pytest_warning_captured(self, warning_message, item):
+        # from _pytest.nodes import get_fslocation_from_item
+        from _pytest.warnings import warning_record_to_str
+
+        warnings = self.stats.setdefault("warnings", [])
+        fslocation = warning_message.filename, warning_message.lineno
+        message = warning_record_to_str(warning_message)
+
+        nodeid = item.nodeid if item is not None else ""
+        warning_report = WarningReport(
+            fslocation=fslocation, message=message, nodeid=nodeid
+        )
+        warnings.append(warning_report)
+
+    def pytest_plugin_registered(self, plugin):
+        if self.config.option.traceconfig:
+            msg = "PLUGIN registered: %s" % (plugin,)
+            # XXX this event may happen during setup/teardown time
+            #     which unfortunately captures our output here
+            #     which garbles our output if we use self.write_line
+            self.write_line(msg)
+
+    def pytest_deselected(self, items):
+        self.stats.setdefault("deselected", []).extend(items)
+
+    def pytest_runtest_logstart(self, nodeid, location):
+        # ensure that the path is printed before the
+        # 1st test of a module starts running
+        if self.showlongtestinfo:
+            line = self._locationline(nodeid, *location)
+            self.write_ensure_prefix(line, "")
+        elif self.showfspath:
+            fsid = nodeid.split("::")[0]
+            self.write_fspath_result(fsid, "")
+
+    def pytest_runtest_logreport(self, report):
+        self._tests_ran = True
+        rep = report
+        res = self.config.hook.pytest_report_teststatus(report=rep, config=self.config)
+        category, letter, word = res
+        if isinstance(word, tuple):
+            word, markup = word
+        else:
+            markup = None
+        self.stats.setdefault(category, []).append(rep)
+        if not letter and not word:
+            # probably passed setup/teardown
+            return
+        running_xdist = hasattr(rep, "node")
+        if markup is None:
+            was_xfail = hasattr(report, "wasxfail")
+            if rep.passed and not was_xfail:
+                markup = {"green": True}
+            elif rep.passed and was_xfail:
+                markup = {"yellow": True}
+            elif rep.failed:
+                markup = {"red": True}
+            elif rep.skipped:
+                markup = {"yellow": True}
+            else:
+                markup = {}
+        if self.verbosity <= 0:
+            if not running_xdist and self.showfspath:
+                self.write_fspath_result(rep.nodeid, letter, **markup)
+            else:
+                self._tw.write(letter, **markup)
+        else:
+            self._progress_nodeids_reported.add(rep.nodeid)
+            line = self._locationline(rep.nodeid, *rep.location)
+            if not running_xdist:
+                self.write_ensure_prefix(line, word, **markup)
+                if self._show_progress_info:
+                    self._write_progress_information_filling_space()
+            else:
+                self.ensure_newline()
+                self._tw.write("[%s]" % rep.node.gateway.id)
+                if self._show_progress_info:
+                    self._tw.write(
+                        self._get_progress_information_message() + " ", cyan=True
+                    )
+                else:
+                    self._tw.write(" ")
+                self._tw.write(word, **markup)
+                self._tw.write(" " + line)
+                self.currentfspath = -2
+
+    def pytest_runtest_logfinish(self, nodeid):
+        if self.verbosity <= 0 and self._show_progress_info:
+            if self._show_progress_info == "count":
+                num_tests = self._session.testscollected
+                progress_length = len(" [{}/{}]".format(str(num_tests), str(num_tests)))
+            else:
+                progress_length = len(" [100%]")
+
+            self._progress_nodeids_reported.add(nodeid)
+            is_last_item = (
+                len(self._progress_nodeids_reported) == self._session.testscollected
+            )
+            if is_last_item:
+                self._write_progress_information_filling_space()
+            else:
+                w = self._width_of_current_line
+                past_edge = w + progress_length + 1 >= self._screen_width
+                if past_edge:
+                    msg = self._get_progress_information_message()
+                    self._tw.write(msg + "\n", cyan=True)
+
+    def _get_progress_information_message(self):
+        collected = self._session.testscollected
+        if self._show_progress_info == "count":
+            if collected:
+                progress = self._progress_nodeids_reported
+                counter_format = "{{:{}d}}".format(len(str(collected)))
+                format_string = " [{}/{{}}]".format(counter_format)
+                return format_string.format(len(progress), collected)
+            return " [ {} / {} ]".format(collected, collected)
+        else:
+            if collected:
+                progress = len(self._progress_nodeids_reported) * 100 // collected
+                return " [{:3d}%]".format(progress)
+            return " [100%]"
+
+    def _write_progress_information_filling_space(self):
+        msg = self._get_progress_information_message()
+        w = self._width_of_current_line
+        fill = self._tw.fullwidth - w - 1
+        self.write(msg.rjust(fill), cyan=True)
+
+    @property
+    def _width_of_current_line(self):
+        """Return the width of current line, using the superior implementation of py-1.6 when available"""
+        try:
+            return self._tw.width_of_current_line
+        except AttributeError:
+            # py < 1.6.0
+            return self._tw.chars_on_current_line
+
+    def pytest_collection(self):
+        if self.isatty:
+            if self.config.option.verbose >= 0:
+                self.write("collecting ... ", bold=True)
+                self._collect_report_last_write = time.time()
+        elif self.config.option.verbose >= 1:
+            self.write("collecting ... ", bold=True)
+
+    def pytest_collectreport(self, report):
+        if report.failed:
+            self.stats.setdefault("error", []).append(report)
+        elif report.skipped:
+            self.stats.setdefault("skipped", []).append(report)
+        items = [x for x in report.result if isinstance(x, pytest.Item)]
+        self._numcollected += len(items)
+        if self.isatty:
+            self.report_collect()
+
+    def report_collect(self, final=False):
+        if self.config.option.verbose < 0:
+            return
+
+        if not final:
+            # Only write "collecting" report every 0.5s.
+            t = time.time()
+            if (
+                self._collect_report_last_write is not None
+                and self._collect_report_last_write > t - REPORT_COLLECTING_RESOLUTION
+            ):
+                return
+            self._collect_report_last_write = t
+
+        errors = len(self.stats.get("error", []))
+        skipped = len(self.stats.get("skipped", []))
+        deselected = len(self.stats.get("deselected", []))
+        selected = self._numcollected - errors - skipped - deselected
+        if final:
+            line = "collected "
+        else:
+            line = "collecting "
+        line += (
+            str(self._numcollected) + " item" + ("" if self._numcollected == 1 else "s")
+        )
+        if errors:
+            line += " / %d errors" % errors
+        if deselected:
+            line += " / %d deselected" % deselected
+        if skipped:
+            line += " / %d skipped" % skipped
+        if self._numcollected > selected > 0:
+            line += " / %d selected" % selected
+        if self.isatty:
+            self.rewrite(line, bold=True, erase=True)
+            if final:
+                self.write("\n")
+        else:
+            self.write_line(line)
+
+    @pytest.hookimpl(trylast=True)
+    def pytest_sessionstart(self, session):
+        self._session = session
+        self._sessionstarttime = time.time()
+        if not self.showheader:
+            return
+        self.write_sep("=", "test session starts", bold=True)
+        verinfo = platform.python_version()
+        msg = "platform %s -- Python %s" % (sys.platform, verinfo)
+        if hasattr(sys, "pypy_version_info"):
+            verinfo = ".".join(map(str, sys.pypy_version_info[:3]))
+            msg += "[pypy-%s-%s]" % (verinfo, sys.pypy_version_info[3])
+        msg += ", pytest-%s, py-%s, pluggy-%s" % (
+            pytest.__version__,
+            py.__version__,
+            pluggy.__version__,
+        )
+        if (
+            self.verbosity > 0
+            or self.config.option.debug
+            or getattr(self.config.option, "pastebin", None)
+        ):
+            msg += " -- " + str(sys.executable)
+        self.write_line(msg)
+        lines = self.config.hook.pytest_report_header(
+            config=self.config, startdir=self.startdir
+        )
+        self._write_report_lines_from_hooks(lines)
+
+    def _write_report_lines_from_hooks(self, lines):
+        lines.reverse()
+        for line in collapse(lines):
+            self.write_line(line)
+
+    def pytest_report_header(self, config):
+        line = "rootdir: %s" % config.rootdir
+
+        if config.inifile:
+            line += ", inifile: " + config.rootdir.bestrelpath(config.inifile)
+
+        testpaths = config.getini("testpaths")
+        if testpaths and config.args == testpaths:
+            rel_paths = [config.rootdir.bestrelpath(x) for x in testpaths]
+            line += ", testpaths: {}".format(", ".join(rel_paths))
+        result = [line]
+
+        plugininfo = config.pluginmanager.list_plugin_distinfo()
+        if plugininfo:
+            result.append("plugins: %s" % ", ".join(_plugin_nameversions(plugininfo)))
+        return result
+
+    def pytest_collection_finish(self, session):
+        self.report_collect(True)
+
+        if self.config.getoption("collectonly"):
+            self._printcollecteditems(session.items)
+
+        lines = self.config.hook.pytest_report_collectionfinish(
+            config=self.config, startdir=self.startdir, items=session.items
+        )
+        self._write_report_lines_from_hooks(lines)
+
+        if self.config.getoption("collectonly"):
+            if self.stats.get("failed"):
+                self._tw.sep("!", "collection failures")
+                for rep in self.stats.get("failed"):
+                    rep.toterminal(self._tw)
+
+    def _printcollecteditems(self, items):
+        # to print out items and their parent collectors
+        # we take care to leave out Instances aka ()
+        # because later versions are going to get rid of them anyway
+        if self.config.option.verbose < 0:
+            if self.config.option.verbose < -1:
+                counts = {}
+                for item in items:
+                    name = item.nodeid.split("::", 1)[0]
+                    counts[name] = counts.get(name, 0) + 1
+                for name, count in sorted(counts.items()):
+                    self._tw.line("%s: %d" % (name, count))
+            else:
+                for item in items:
+                    self._tw.line(item.nodeid)
+            return
+        stack = []
+        indent = ""
+        for item in items:
+            needed_collectors = item.listchain()[1:]  # strip root node
+            while stack:
+                if stack == needed_collectors[: len(stack)]:
+                    break
+                stack.pop()
+            for col in needed_collectors[len(stack) :]:
+                stack.append(col)
+                if col.name == "()":  # Skip Instances.
+                    continue
+                indent = (len(stack) - 1) * "  "
+                self._tw.line("%s%s" % (indent, col))
+                if self.config.option.verbose >= 1:
+                    if hasattr(col, "_obj") and col._obj.__doc__:
+                        for line in col._obj.__doc__.strip().splitlines():
+                            self._tw.line("%s%s" % (indent + "  ", line.strip()))
+
+    @pytest.hookimpl(hookwrapper=True)
+    def pytest_sessionfinish(self, exitstatus):
+        outcome = yield
+        outcome.get_result()
+        self._tw.line("")
+        summary_exit_codes = (
+            EXIT_OK,
+            EXIT_TESTSFAILED,
+            EXIT_INTERRUPTED,
+            EXIT_USAGEERROR,
+            EXIT_NOTESTSCOLLECTED,
+        )
+        if exitstatus in summary_exit_codes:
+            self.config.hook.pytest_terminal_summary(
+                terminalreporter=self, exitstatus=exitstatus, config=self.config
+            )
+        if exitstatus == EXIT_INTERRUPTED:
+            self._report_keyboardinterrupt()
+            del self._keyboardinterrupt_memo
+        self.summary_stats()
+
+    @pytest.hookimpl(hookwrapper=True)
+    def pytest_terminal_summary(self):
+        self.summary_errors()
+        self.summary_failures()
+        self.summary_warnings()
+        self.summary_passes()
+        yield
+        self.short_test_summary()
+        # Display any extra warnings from teardown here (if any).
+        self.summary_warnings()
+
+    def pytest_keyboard_interrupt(self, excinfo):
+        self._keyboardinterrupt_memo = excinfo.getrepr(funcargs=True)
+
+    def pytest_unconfigure(self):
+        if hasattr(self, "_keyboardinterrupt_memo"):
+            self._report_keyboardinterrupt()
+
+    def _report_keyboardinterrupt(self):
+        excrepr = self._keyboardinterrupt_memo
+        msg = excrepr.reprcrash.message
+        self.write_sep("!", msg)
+        if "KeyboardInterrupt" in msg:
+            if self.config.option.fulltrace:
+                excrepr.toterminal(self._tw)
+            else:
+                excrepr.reprcrash.toterminal(self._tw)
+                self._tw.line(
+                    "(to show a full traceback on KeyboardInterrupt use --fulltrace)",
+                    yellow=True,
+                )
+
+    def _locationline(self, nodeid, fspath, lineno, domain):
+        def mkrel(nodeid):
+            line = self.config.cwd_relative_nodeid(nodeid)
+            if domain and line.endswith(domain):
+                line = line[: -len(domain)]
+                values = domain.split("[")
+                values[0] = values[0].replace(".", "::")  # don't replace '.' in params
+                line += "[".join(values)
+            return line
+
+        # collect_fspath comes from testid which has a "/"-normalized path
+
+        if fspath:
+            res = mkrel(nodeid)
+            if self.verbosity >= 2 and nodeid.split("::")[0] != fspath.replace(
+                "\\", nodes.SEP
+            ):
+                res += " <- " + self.startdir.bestrelpath(fspath)
+        else:
+            res = "[location]"
+        return res + " "
+
+    def _getfailureheadline(self, rep):
+        head_line = rep.head_line
+        if head_line:
+            return head_line
+        return "test session"  # XXX?
+
+    def _getcrashline(self, rep):
+        try:
+            return str(rep.longrepr.reprcrash)
+        except AttributeError:
+            try:
+                return str(rep.longrepr)[:50]
+            except AttributeError:
+                return ""
+
+    #
+    # summaries for sessionfinish
+    #
+    def getreports(self, name):
+        values = []
+        for x in self.stats.get(name, []):
+            if not hasattr(x, "_pdbshown"):
+                values.append(x)
+        return values
+
+    def summary_warnings(self):
+        if self.hasopt("w"):
+            all_warnings = self.stats.get("warnings")
+            if not all_warnings:
+                return
+
+            final = hasattr(self, "_already_displayed_warnings")
+            if final:
+                warning_reports = all_warnings[self._already_displayed_warnings :]
+            else:
+                warning_reports = all_warnings
+            self._already_displayed_warnings = len(warning_reports)
+            if not warning_reports:
+                return
+
+            reports_grouped_by_message = collections.OrderedDict()
+            for wr in warning_reports:
+                reports_grouped_by_message.setdefault(wr.message, []).append(wr)
+
+            title = "warnings summary (final)" if final else "warnings summary"
+            self.write_sep("=", title, yellow=True, bold=False)
+            for message, warning_reports in reports_grouped_by_message.items():
+                has_any_location = False
+                for w in warning_reports:
+                    location = w.get_location(self.config)
+                    if location:
+                        self._tw.line(str(location))
+                        has_any_location = True
+                if has_any_location:
+                    lines = message.splitlines()
+                    indented = "\n".join("  " + x for x in lines)
+                    message = indented.rstrip()
+                else:
+                    message = message.rstrip()
+                self._tw.line(message)
+                self._tw.line()
+            self._tw.line("-- Docs: https://docs.pytest.org/en/latest/warnings.html")
+
+    def summary_passes(self):
+        if self.config.option.tbstyle != "no":
+            if self.hasopt("P"):
+                reports = self.getreports("passed")
+                if not reports:
+                    return
+                self.write_sep("=", "PASSES")
+                for rep in reports:
+                    if rep.sections:
+                        msg = self._getfailureheadline(rep)
+                        self.write_sep("_", msg, green=True, bold=True)
+                        self._outrep_summary(rep)
+
+    def print_teardown_sections(self, rep):
+        showcapture = self.config.option.showcapture
+        if showcapture == "no":
+            return
+        for secname, content in rep.sections:
+            if showcapture != "all" and showcapture not in secname:
+                continue
+            if "teardown" in secname:
+                self._tw.sep("-", secname)
+                if content[-1:] == "\n":
+                    content = content[:-1]
+                self._tw.line(content)
+
+    def summary_failures(self):
+        if self.config.option.tbstyle != "no":
+            reports = self.getreports("failed")
+            if not reports:
+                return
+            self.write_sep("=", "FAILURES")
+            if self.config.option.tbstyle == "line":
+                for rep in reports:
+                    line = self._getcrashline(rep)
+                    self.write_line(line)
+            else:
+                teardown_sections = {}
+                for report in self.getreports(""):
+                    if report.when == "teardown":
+                        teardown_sections.setdefault(report.nodeid, []).append(report)
+
+                for rep in reports:
+                    msg = self._getfailureheadline(rep)
+                    self.write_sep("_", msg, red=True, bold=True)
+                    self._outrep_summary(rep)
+                    for report in teardown_sections.get(rep.nodeid, []):
+                        self.print_teardown_sections(report)
+
+    def summary_errors(self):
+        if self.config.option.tbstyle != "no":
+            reports = self.getreports("error")
+            if not reports:
+                return
+            self.write_sep("=", "ERRORS")
+            for rep in self.stats["error"]:
+                msg = self._getfailureheadline(rep)
+                if rep.when == "collect":
+                    msg = "ERROR collecting " + msg
+                else:
+                    msg = "ERROR at %s of %s" % (rep.when, msg)
+                self.write_sep("_", msg, red=True, bold=True)
+                self._outrep_summary(rep)
+
+    def _outrep_summary(self, rep):
+        rep.toterminal(self._tw)
+        showcapture = self.config.option.showcapture
+        if showcapture == "no":
+            return
+        for secname, content in rep.sections:
+            if showcapture != "all" and showcapture not in secname:
+                continue
+            self._tw.sep("-", secname)
+            if content[-1:] == "\n":
+                content = content[:-1]
+            self._tw.line(content)
+
+    def summary_stats(self):
+        session_duration = time.time() - self._sessionstarttime
+        (line, color) = build_summary_stats_line(self.stats)
+        msg = "%s in %.2f seconds" % (line, session_duration)
+        markup = {color: True, "bold": True}
+
+        if self.verbosity >= 0:
+            self.write_sep("=", msg, **markup)
+        if self.verbosity == -1:
+            self.write_line(msg, **markup)
+
+    def short_test_summary(self):
+        if not self.reportchars:
+            return
+
+        def show_simple(stat, lines):
+            failed = self.stats.get(stat, [])
+            if not failed:
+                return
+            termwidth = self.writer.fullwidth
+            config = self.config
+            for rep in failed:
+                line = _get_line_with_reprcrash_message(config, rep, termwidth)
+                lines.append(line)
+
+        def show_xfailed(lines):
+            xfailed = self.stats.get("xfailed", [])
+            for rep in xfailed:
+                verbose_word = rep._get_verbose_word(self.config)
+                pos = _get_pos(self.config, rep)
+                lines.append("%s %s" % (verbose_word, pos))
+                reason = rep.wasxfail
+                if reason:
+                    lines.append("  " + str(reason))
+
+        def show_xpassed(lines):
+            xpassed = self.stats.get("xpassed", [])
+            for rep in xpassed:
+                verbose_word = rep._get_verbose_word(self.config)
+                pos = _get_pos(self.config, rep)
+                reason = rep.wasxfail
+                lines.append("%s %s %s" % (verbose_word, pos, reason))
+
+        def show_skipped(lines):
+            skipped = self.stats.get("skipped", [])
+            fskips = _folded_skips(skipped) if skipped else []
+            if not fskips:
+                return
+            verbose_word = skipped[0]._get_verbose_word(self.config)
+            for num, fspath, lineno, reason in fskips:
+                if reason.startswith("Skipped: "):
+                    reason = reason[9:]
+                if lineno is not None:
+                    lines.append(
+                        "%s [%d] %s:%d: %s"
+                        % (verbose_word, num, fspath, lineno + 1, reason)
+                    )
+                else:
+                    lines.append("%s [%d] %s: %s" % (verbose_word, num, fspath, reason))
+
+        REPORTCHAR_ACTIONS = {
+            "x": show_xfailed,
+            "X": show_xpassed,
+            "f": partial(show_simple, "failed"),
+            "s": show_skipped,
+            "p": partial(show_simple, "passed"),
+            "E": partial(show_simple, "error"),
+        }
+
+        lines = []
+        for char in self.reportchars:
+            action = REPORTCHAR_ACTIONS.get(char)
+            if action:  # skipping e.g. "P" (passed with output) here.
+                action(lines)
+
+        if lines:
+            self.write_sep("=", "short test summary info")
+            for line in lines:
+                self.write_line(line)
+
+
+def _get_pos(config, rep):
+    nodeid = config.cwd_relative_nodeid(rep.nodeid)
+    return nodeid
+
+
+def _get_line_with_reprcrash_message(config, rep, termwidth):
+    """Get summary line for a report, trying to add reprcrash message."""
+    from wcwidth import wcswidth
+
+    verbose_word = rep._get_verbose_word(config)
+    pos = _get_pos(config, rep)
+
+    line = "%s %s" % (verbose_word, pos)
+    len_line = wcswidth(line)
+    ellipsis, len_ellipsis = "...", 3
+    if len_line > termwidth - len_ellipsis:
+        # No space for an additional message.
+        return line
+
+    try:
+        msg = rep.longrepr.reprcrash.message
+    except AttributeError:
+        pass
+    else:
+        # Only use the first line.
+        i = msg.find("\n")
+        if i != -1:
+            msg = msg[:i]
+        len_msg = wcswidth(msg)
+
+        sep, len_sep = " - ", 3
+        max_len_msg = termwidth - len_line - len_sep
+        if max_len_msg >= len_ellipsis:
+            if len_msg > max_len_msg:
+                max_len_msg -= len_ellipsis
+                msg = msg[:max_len_msg]
+                while wcswidth(msg) > max_len_msg:
+                    msg = msg[:-1]
+                if six.PY2:
+                    # on python 2 systems with narrow unicode compilation, trying to
+                    # get a single character out of a multi-byte unicode character such as
+                    # u'😄' will result in a High Surrogate (U+D83D) character, which is
+                    # rendered as u'�'; in this case we just strip that character out as it
+                    # serves no purpose being rendered
+                    try:
+                        surrogate = six.unichr(0xD83D)
+                        msg = msg.rstrip(surrogate)
+                    except ValueError:  # pragma: no cover
+                        # Jython cannot represent this lone surrogate at all (#5256):
+                        # ValueError: unichr() arg is a lone surrogate in range
+                        #     (0xD800, 0xDFFF) (Jython UTF-16 encoding)
+                        # ignore this case as it shouldn't appear in the string anyway
+                        pass
+                msg += ellipsis
+            line += sep + msg
+    return line
+
+
+def _folded_skips(skipped):
+    d = {}
+    for event in skipped:
+        key = event.longrepr
+        assert len(key) == 3, (event, key)
+        keywords = getattr(event, "keywords", {})
+        # folding reports with global pytestmark variable
+        # this is workaround, because for now we cannot identify the scope of a skip marker
+        # TODO: revisit after marks scope would be fixed
+        if (
+            event.when == "setup"
+            and "skip" in keywords
+            and "pytestmark" not in keywords
+        ):
+            key = (key[0], None, key[2])
+        d.setdefault(key, []).append(event)
+    values = []
+    for key, events in d.items():
+        values.append((len(events),) + key)
+    return values
+
+
+def build_summary_stats_line(stats):
+    known_types = (
+        "failed passed skipped deselected xfailed xpassed warnings error".split()
+    )
+    unknown_type_seen = False
+    for found_type in stats:
+        if found_type not in known_types:
+            if found_type:  # setup/teardown reports have an empty key, ignore them
+                known_types.append(found_type)
+                unknown_type_seen = True
+    parts = []
+    for key in known_types:
+        reports = stats.get(key, None)
+        if reports:
+            count = sum(
+                1 for rep in reports if getattr(rep, "count_towards_summary", True)
+            )
+            parts.append("%d %s" % (count, key))
+
+    if parts:
+        line = ", ".join(parts)
+    else:
+        line = "no tests ran"
+
+    if "failed" in stats or "error" in stats:
+        color = "red"
+    elif "warnings" in stats or unknown_type_seen:
+        color = "yellow"
+    elif "passed" in stats:
+        color = "green"
+    else:
+        color = "yellow"
+
+    return line, color
+
+
+def _plugin_nameversions(plugininfo):
+    values = []
+    for plugin, dist in plugininfo:
+        # gets us name and version!
+        name = "{dist.project_name}-{dist.version}".format(dist=dist)
+        # questionable convenience, but it keeps things short
+        if name.startswith("pytest-"):
+            name = name[7:]
+        # we decided to print python package names
+        # they can have more than one plugin
+        if name not in values:
+            values.append(name)
+    return values
diff --git a/contrib/python/pytest/py2/_pytest/tmpdir.py b/contrib/python/pytest/py2/_pytest/tmpdir.py
new file mode 100644
index 0000000000..a8a7037713
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/tmpdir.py
@@ -0,0 +1,197 @@
+# -*- coding: utf-8 -*-
+""" support for providing temporary directories to test functions.  """
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import os
+import re
+import tempfile
+import warnings
+
+import attr
+import py
+import six
+
+import pytest
+from .pathlib import ensure_reset_dir
+from .pathlib import LOCK_TIMEOUT
+from .pathlib import make_numbered_dir
+from .pathlib import make_numbered_dir_with_cleanup
+from .pathlib import Path
+from _pytest.monkeypatch import MonkeyPatch
+
+
+@attr.s
+class TempPathFactory(object):
+    """Factory for temporary directories under the common base temp directory.
+
+    The base directory can be configured using the ``--basetemp`` option."""
+
+    _given_basetemp = attr.ib(
+        # using os.path.abspath() to get absolute path instead of resolve() as it
+        # does not work the same in all platforms (see #4427)
+        # Path.absolute() exists, but it is not public (see https://bugs.python.org/issue25012)
+        converter=attr.converters.optional(
+            lambda p: Path(os.path.abspath(six.text_type(p)))
+        )
+    )
+    _trace = attr.ib()
+    _basetemp = attr.ib(default=None)
+
+    @classmethod
+    def from_config(cls, config):
+        """
+        :param config: a pytest configuration
+        """
+        return cls(
+            given_basetemp=config.option.basetemp, trace=config.trace.get("tmpdir")
+        )
+
+    def mktemp(self, basename, numbered=True):
+        """makes a temporary directory managed by the factory"""
+        if not numbered:
+            p = self.getbasetemp().joinpath(basename)
+            p.mkdir()
+        else:
+            p = make_numbered_dir(root=self.getbasetemp(), prefix=basename)
+            self._trace("mktemp", p)
+        return p
+
+    def getbasetemp(self):
+        """ return base temporary directory. """
+        if self._basetemp is not None:
+            return self._basetemp
+
+        if self._given_basetemp is not None:
+            basetemp = self._given_basetemp
+            ensure_reset_dir(basetemp)
+            basetemp = basetemp.resolve()
+        else:
+            from_env = os.environ.get("PYTEST_DEBUG_TEMPROOT")
+            temproot = Path(from_env or tempfile.gettempdir()).resolve()
+            user = get_user() or "unknown"
+            # use a sub-directory in the temproot to speed-up
+            # make_numbered_dir() call
+            rootdir = temproot.joinpath("pytest-of-{}".format(user))
+            rootdir.mkdir(exist_ok=True)
+            basetemp = make_numbered_dir_with_cleanup(
+                prefix="pytest-", root=rootdir, keep=3, lock_timeout=LOCK_TIMEOUT
+            )
+        assert basetemp is not None, basetemp
+        self._basetemp = t = basetemp
+        self._trace("new basetemp", t)
+        return t
+
+
+@attr.s
+class TempdirFactory(object):
+    """
+    backward comptibility wrapper that implements
+    :class:``py.path.local`` for :class:``TempPathFactory``
+    """
+
+    _tmppath_factory = attr.ib()
+
+    def ensuretemp(self, string, dir=1):
+        """ (deprecated) return temporary directory path with
+            the given string as the trailing part.  It is usually
+            better to use the 'tmpdir' function argument which
+            provides an empty unique-per-test-invocation directory
+            and is guaranteed to be empty.
+        """
+        # py.log._apiwarn(">1.1", "use tmpdir function argument")
+        from .deprecated import PYTEST_ENSURETEMP
+
+        warnings.warn(PYTEST_ENSURETEMP, stacklevel=2)
+        return self.getbasetemp().ensure(string, dir=dir)
+
+    def mktemp(self, basename, numbered=True):
+        """Create a subdirectory of the base temporary directory and return it.
+        If ``numbered``, ensure the directory is unique by adding a number
+        prefix greater than any existing one.
+        """
+        return py.path.local(self._tmppath_factory.mktemp(basename, numbered).resolve())
+
+    def getbasetemp(self):
+        """backward compat wrapper for ``_tmppath_factory.getbasetemp``"""
+        return py.path.local(self._tmppath_factory.getbasetemp().resolve())
+
+
+def get_user():
+    """Return the current user name, or None if getuser() does not work
+    in the current environment (see #1010).
+    """
+    import getpass
+
+    try:
+        return getpass.getuser()
+    except (ImportError, KeyError):
+        return None
+
+
+def pytest_configure(config):
+    """Create a TempdirFactory and attach it to the config object.
+
+    This is to comply with existing plugins which expect the handler to be
+    available at pytest_configure time, but ideally should be moved entirely
+    to the tmpdir_factory session fixture.
+    """
+    mp = MonkeyPatch()
+    tmppath_handler = TempPathFactory.from_config(config)
+    t = TempdirFactory(tmppath_handler)
+    config._cleanup.append(mp.undo)
+    mp.setattr(config, "_tmp_path_factory", tmppath_handler, raising=False)
+    mp.setattr(config, "_tmpdirhandler", t, raising=False)
+    mp.setattr(pytest, "ensuretemp", t.ensuretemp, raising=False)
+
+
+@pytest.fixture(scope="session")
+def tmpdir_factory(request):
+    """Return a :class:`_pytest.tmpdir.TempdirFactory` instance for the test session.
+    """
+    return request.config._tmpdirhandler
+
+
+@pytest.fixture(scope="session")
+def tmp_path_factory(request):
+    """Return a :class:`_pytest.tmpdir.TempPathFactory` instance for the test session.
+    """
+    return request.config._tmp_path_factory
+
+
+def _mk_tmp(request, factory):
+    name = request.node.name
+    name = re.sub(r"[\W]", "_", name)
+    MAXVAL = 30
+    name = name[:MAXVAL]
+    return factory.mktemp(name, numbered=True)
+
+
+@pytest.fixture
+def tmpdir(tmp_path):
+    """Return a temporary directory path object
+    which is unique to each test function invocation,
+    created as a sub directory of the base temporary
+    directory.  The returned object is a `py.path.local`_
+    path object.
+
+    .. _`py.path.local`: https://py.readthedocs.io/en/latest/path.html
+    """
+    return py.path.local(tmp_path)
+
+
+@pytest.fixture
+def tmp_path(request, tmp_path_factory):
+    """Return a temporary directory path object
+    which is unique to each test function invocation,
+    created as a sub directory of the base temporary
+    directory.  The returned object is a :class:`pathlib.Path`
+    object.
+
+    .. note::
+
+        in python < 3.6 this is a pathlib2.Path
+    """
+
+    return _mk_tmp(request, tmp_path_factory)
diff --git a/contrib/python/pytest/py2/_pytest/unittest.py b/contrib/python/pytest/py2/_pytest/unittest.py
new file mode 100644
index 0000000000..3ff6f45d8d
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/unittest.py
@@ -0,0 +1,291 @@
+# -*- coding: utf-8 -*-
+""" discovery and running of std-library "unittest" style tests. """
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import sys
+import traceback
+
+import _pytest._code
+import pytest
+from _pytest.compat import getimfunc
+from _pytest.config import hookimpl
+from _pytest.outcomes import fail
+from _pytest.outcomes import skip
+from _pytest.outcomes import xfail
+from _pytest.python import Class
+from _pytest.python import Function
+
+
+def pytest_pycollect_makeitem(collector, name, obj):
+    # has unittest been imported and is obj a subclass of its TestCase?
+    try:
+        if not issubclass(obj, sys.modules["unittest"].TestCase):
+            return
+    except Exception:
+        return
+    # yes, so let's collect it
+    return UnitTestCase(name, parent=collector)
+
+
+class UnitTestCase(Class):
+    # marker for fixturemanger.getfixtureinfo()
+    # to declare that our children do not support funcargs
+    nofuncargs = True
+
+    def collect(self):
+        from unittest import TestLoader
+
+        cls = self.obj
+        if not getattr(cls, "__test__", True):
+            return
+
+        skipped = getattr(cls, "__unittest_skip__", False)
+        if not skipped:
+            self._inject_setup_teardown_fixtures(cls)
+            self._inject_setup_class_fixture()
+
+        self.session._fixturemanager.parsefactories(self, unittest=True)
+        loader = TestLoader()
+        foundsomething = False
+        for name in loader.getTestCaseNames(self.obj):
+            x = getattr(self.obj, name)
+            if not getattr(x, "__test__", True):
+                continue
+            funcobj = getimfunc(x)
+            yield TestCaseFunction(name, parent=self, callobj=funcobj)
+            foundsomething = True
+
+        if not foundsomething:
+            runtest = getattr(self.obj, "runTest", None)
+            if runtest is not None:
+                ut = sys.modules.get("twisted.trial.unittest", None)
+                if ut is None or runtest != ut.TestCase.runTest:
+                    yield TestCaseFunction("runTest", parent=self)
+
+    def _inject_setup_teardown_fixtures(self, cls):
+        """Injects a hidden auto-use fixture to invoke setUpClass/setup_method and corresponding
+        teardown functions (#517)"""
+        class_fixture = _make_xunit_fixture(
+            cls, "setUpClass", "tearDownClass", scope="class", pass_self=False
+        )
+        if class_fixture:
+            cls.__pytest_class_setup = class_fixture
+
+        method_fixture = _make_xunit_fixture(
+            cls, "setup_method", "teardown_method", scope="function", pass_self=True
+        )
+        if method_fixture:
+            cls.__pytest_method_setup = method_fixture
+
+
+def _make_xunit_fixture(obj, setup_name, teardown_name, scope, pass_self):
+    setup = getattr(obj, setup_name, None)
+    teardown = getattr(obj, teardown_name, None)
+    if setup is None and teardown is None:
+        return None
+
+    @pytest.fixture(scope=scope, autouse=True)
+    def fixture(self, request):
+        if getattr(self, "__unittest_skip__", None):
+            reason = self.__unittest_skip_why__
+            pytest.skip(reason)
+        if setup is not None:
+            if pass_self:
+                setup(self, request.function)
+            else:
+                setup()
+        yield
+        if teardown is not None:
+            if pass_self:
+                teardown(self, request.function)
+            else:
+                teardown()
+
+    return fixture
+
+
+class TestCaseFunction(Function):
+    nofuncargs = True
+    _excinfo = None
+    _testcase = None
+
+    def setup(self):
+        self._testcase = self.parent.obj(self.name)
+        self._fix_unittest_skip_decorator()
+        self._obj = getattr(self._testcase, self.name)
+        if hasattr(self, "_request"):
+            self._request._fillfixtures()
+
+    def _fix_unittest_skip_decorator(self):
+        """
+        The @unittest.skip decorator calls functools.wraps(self._testcase)
+        The call to functools.wraps() fails unless self._testcase
+        has a __name__ attribute. This is usually automatically supplied
+        if the test is a function or method, but we need to add manually
+        here.
+
+        See issue #1169
+        """
+        if sys.version_info[0] == 2:
+            setattr(self._testcase, "__name__", self.name)
+
+    def teardown(self):
+        self._testcase = None
+        self._obj = None
+
+    def startTest(self, testcase):
+        pass
+
+    def _addexcinfo(self, rawexcinfo):
+        # unwrap potential exception info (see twisted trial support below)
+        rawexcinfo = getattr(rawexcinfo, "_rawexcinfo", rawexcinfo)
+        try:
+            excinfo = _pytest._code.ExceptionInfo(rawexcinfo)
+            # invoke the attributes to trigger storing the traceback
+            # trial causes some issue there
+            excinfo.value
+            excinfo.traceback
+        except TypeError:
+            try:
+                try:
+                    values = traceback.format_exception(*rawexcinfo)
+                    values.insert(
+                        0,
+                        "NOTE: Incompatible Exception Representation, "
+                        "displaying natively:\n\n",
+                    )
+                    fail("".join(values), pytrace=False)
+                except (fail.Exception, KeyboardInterrupt):
+                    raise
+                except:  # noqa
+                    fail(
+                        "ERROR: Unknown Incompatible Exception "
+                        "representation:\n%r" % (rawexcinfo,),
+                        pytrace=False,
+                    )
+            except KeyboardInterrupt:
+                raise
+            except fail.Exception:
+                excinfo = _pytest._code.ExceptionInfo.from_current()
+        self.__dict__.setdefault("_excinfo", []).append(excinfo)
+
+    def addError(self, testcase, rawexcinfo):
+        self._addexcinfo(rawexcinfo)
+
+    def addFailure(self, testcase, rawexcinfo):
+        self._addexcinfo(rawexcinfo)
+
+    def addSkip(self, testcase, reason):
+        try:
+            skip(reason)
+        except skip.Exception:
+            self._skipped_by_mark = True
+            self._addexcinfo(sys.exc_info())
+
+    def addExpectedFailure(self, testcase, rawexcinfo, reason=""):
+        try:
+            xfail(str(reason))
+        except xfail.Exception:
+            self._addexcinfo(sys.exc_info())
+
+    def addUnexpectedSuccess(self, testcase, reason=""):
+        self._unexpectedsuccess = reason
+
+    def addSuccess(self, testcase):
+        pass
+
+    def stopTest(self, testcase):
+        pass
+
+    def _handle_skip(self):
+        # implements the skipping machinery (see #2137)
+        # analog to pythons Lib/unittest/case.py:run
+        testMethod = getattr(self._testcase, self._testcase._testMethodName)
+        if getattr(self._testcase.__class__, "__unittest_skip__", False) or getattr(
+            testMethod, "__unittest_skip__", False
+        ):
+            # If the class or method was skipped.
+            skip_why = getattr(
+                self._testcase.__class__, "__unittest_skip_why__", ""
+            ) or getattr(testMethod, "__unittest_skip_why__", "")
+            try:  # PY3, unittest2 on PY2
+                self._testcase._addSkip(self, self._testcase, skip_why)
+            except TypeError:  # PY2
+                if sys.version_info[0] != 2:
+                    raise
+                self._testcase._addSkip(self, skip_why)
+            return True
+        return False
+
+    def runtest(self):
+        if self.config.pluginmanager.get_plugin("pdbinvoke") is None:
+            self._testcase(result=self)
+        else:
+            # disables tearDown and cleanups for post mortem debugging (see #1890)
+            if self._handle_skip():
+                return
+            self._testcase.debug()
+
+    def _prunetraceback(self, excinfo):
+        Function._prunetraceback(self, excinfo)
+        traceback = excinfo.traceback.filter(
+            lambda x: not x.frame.f_globals.get("__unittest")
+        )
+        if traceback:
+            excinfo.traceback = traceback
+
+
+@hookimpl(tryfirst=True)
+def pytest_runtest_makereport(item, call):
+    if isinstance(item, TestCaseFunction):
+        if item._excinfo:
+            call.excinfo = item._excinfo.pop(0)
+            try:
+                del call.result
+            except AttributeError:
+                pass
+
+
+# twisted trial support
+
+
+@hookimpl(hookwrapper=True)
+def pytest_runtest_protocol(item):
+    if isinstance(item, TestCaseFunction) and "twisted.trial.unittest" in sys.modules:
+        ut = sys.modules["twisted.python.failure"]
+        Failure__init__ = ut.Failure.__init__
+        check_testcase_implements_trial_reporter()
+
+        def excstore(
+            self, exc_value=None, exc_type=None, exc_tb=None, captureVars=None
+        ):
+            if exc_value is None:
+                self._rawexcinfo = sys.exc_info()
+            else:
+                if exc_type is None:
+                    exc_type = type(exc_value)
+                self._rawexcinfo = (exc_type, exc_value, exc_tb)
+            try:
+                Failure__init__(
+                    self, exc_value, exc_type, exc_tb, captureVars=captureVars
+                )
+            except TypeError:
+                Failure__init__(self, exc_value, exc_type, exc_tb)
+
+        ut.Failure.__init__ = excstore
+        yield
+        ut.Failure.__init__ = Failure__init__
+    else:
+        yield
+
+
+def check_testcase_implements_trial_reporter(done=[]):
+    if done:
+        return
+    from zope.interface import classImplements
+    from twisted.trial.itrial import IReporter
+
+    classImplements(TestCaseFunction, IReporter)
+    done.append(1)
diff --git a/contrib/python/pytest/py2/_pytest/warning_types.py b/contrib/python/pytest/py2/_pytest/warning_types.py
new file mode 100644
index 0000000000..861010a127
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/warning_types.py
@@ -0,0 +1,112 @@
+# -*- coding: utf-8 -*-
+import attr
+
+
+class PytestWarning(UserWarning):
+    """
+    Bases: :class:`UserWarning`.
+
+    Base class for all warnings emitted by pytest.
+    """
+
+
+class PytestAssertRewriteWarning(PytestWarning):
+    """
+    Bases: :class:`PytestWarning`.
+
+    Warning emitted by the pytest assert rewrite module.
+    """
+
+
+class PytestCacheWarning(PytestWarning):
+    """
+    Bases: :class:`PytestWarning`.
+
+    Warning emitted by the cache plugin in various situations.
+    """
+
+
+class PytestConfigWarning(PytestWarning):
+    """
+    Bases: :class:`PytestWarning`.
+
+    Warning emitted for configuration issues.
+    """
+
+
+class PytestCollectionWarning(PytestWarning):
+    """
+    Bases: :class:`PytestWarning`.
+
+    Warning emitted when pytest is not able to collect a file or symbol in a module.
+    """
+
+
+class PytestDeprecationWarning(PytestWarning, DeprecationWarning):
+    """
+    Bases: :class:`pytest.PytestWarning`, :class:`DeprecationWarning`.
+
+    Warning class for features that will be removed in a future version.
+    """
+
+
+class PytestExperimentalApiWarning(PytestWarning, FutureWarning):
+    """
+    Bases: :class:`pytest.PytestWarning`, :class:`FutureWarning`.
+
+    Warning category used to denote experiments in pytest. Use sparingly as the API might change or even be
+    removed completely in future version
+    """
+
+    @classmethod
+    def simple(cls, apiname):
+        return cls(
+            "{apiname} is an experimental api that may change over time".format(
+                apiname=apiname
+            )
+        )
+
+
+class PytestUnhandledCoroutineWarning(PytestWarning):
+    """
+    Bases: :class:`PytestWarning`.
+
+    Warning emitted when pytest encounters a test function which is a coroutine,
+    but it was not handled by any async-aware plugin. Coroutine test functions
+    are not natively supported.
+    """
+
+
+class PytestUnknownMarkWarning(PytestWarning):
+    """
+    Bases: :class:`PytestWarning`.
+
+    Warning emitted on use of unknown markers.
+    See https://docs.pytest.org/en/latest/mark.html for details.
+    """
+
+
+class RemovedInPytest4Warning(PytestDeprecationWarning):
+    """
+    Bases: :class:`pytest.PytestDeprecationWarning`.
+
+    Warning class for features scheduled to be removed in pytest 4.0.
+    """
+
+
+@attr.s
+class UnformattedWarning(object):
+    """Used to hold warnings that need to format their message at runtime, as opposed to a direct message.
+
+    Using this class avoids to keep all the warning types and messages in this module, avoiding misuse.
+    """
+
+    category = attr.ib()
+    template = attr.ib()
+
+    def format(self, **kwargs):
+        """Returns an instance of the warning category, formatted with given kwargs"""
+        return self.category(self.template.format(**kwargs))
+
+
+PYTESTER_COPY_EXAMPLE = PytestExperimentalApiWarning.simple("testdir.copy_example")
diff --git a/contrib/python/pytest/py2/_pytest/warnings.py b/contrib/python/pytest/py2/_pytest/warnings.py
new file mode 100644
index 0000000000..a3debae462
--- /dev/null
+++ b/contrib/python/pytest/py2/_pytest/warnings.py
@@ -0,0 +1,180 @@
+# -*- coding: utf-8 -*-
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+
+import sys
+import warnings
+from contextlib import contextmanager
+
+import pytest
+from _pytest import compat
+
+SHOW_PYTEST_WARNINGS_ARG = "-Walways::pytest.RemovedInPytest4Warning"
+
+
+def _setoption(wmod, arg):
+    """
+    Copy of the warning._setoption function but does not escape arguments.
+    """
+    parts = arg.split(":")
+    if len(parts) > 5:
+        raise wmod._OptionError("too many fields (max 5): %r" % (arg,))
+    while len(parts) < 5:
+        parts.append("")
+    action, message, category, module, lineno = [s.strip() for s in parts]
+    action = wmod._getaction(action)
+    category = wmod._getcategory(category)
+    if lineno:
+        try:
+            lineno = int(lineno)
+            if lineno < 0:
+                raise ValueError
+        except (ValueError, OverflowError):
+            raise wmod._OptionError("invalid lineno %r" % (lineno,))
+    else:
+        lineno = 0
+    wmod.filterwarnings(action, message, category, module, lineno)
+
+
+def pytest_addoption(parser):
+    group = parser.getgroup("pytest-warnings")
+    group.addoption(
+        "-W",
+        "--pythonwarnings",
+        action="append",
+        help="set which warnings to report, see -W option of python itself.",
+    )
+    parser.addini(
+        "filterwarnings",
+        type="linelist",
+        help="Each line specifies a pattern for "
+        "warnings.filterwarnings. "
+        "Processed after -W and --pythonwarnings.",
+    )
+
+
+def pytest_configure(config):
+    config.addinivalue_line(
+        "markers",
+        "filterwarnings(warning): add a warning filter to the given test. "
+        "see https://docs.pytest.org/en/latest/warnings.html#pytest-mark-filterwarnings ",
+    )
+
+
+@contextmanager
+def catch_warnings_for_item(config, ihook, when, item):
+    """
+    Context manager that catches warnings generated in the contained execution block.
+
+    ``item`` can be None if we are not in the context of an item execution.
+
+    Each warning captured triggers the ``pytest_warning_captured`` hook.
+    """
+    cmdline_filters = config.getoption("pythonwarnings") or []
+    inifilters = config.getini("filterwarnings")
+    with warnings.catch_warnings(record=True) as log:
+
+        if not sys.warnoptions:
+            # if user is not explicitly configuring warning filters, show deprecation warnings by default (#2908)
+            warnings.filterwarnings("always", category=DeprecationWarning)
+            warnings.filterwarnings("always", category=PendingDeprecationWarning)
+
+        warnings.filterwarnings("error", category=pytest.RemovedInPytest4Warning)
+
+        # filters should have this precedence: mark, cmdline options, ini
+        # filters should be applied in the inverse order of precedence
+        for arg in inifilters:
+            _setoption(warnings, arg)
+
+        for arg in cmdline_filters:
+            warnings._setoption(arg)
+
+        if item is not None:
+            for mark in item.iter_markers(name="filterwarnings"):
+                for arg in mark.args:
+                    _setoption(warnings, arg)
+
+        yield
+
+        for warning_message in log:
+            ihook.pytest_warning_captured.call_historic(
+                kwargs=dict(warning_message=warning_message, when=when, item=item)
+            )
+
+
+def warning_record_to_str(warning_message):
+    """Convert a warnings.WarningMessage to a string.
+
+    This takes lot of unicode shenaningans into account for Python 2.
+    When Python 2 support is dropped this function can be greatly simplified.
+    """
+    warn_msg = warning_message.message
+    unicode_warning = False
+    if compat._PY2 and any(isinstance(m, compat.UNICODE_TYPES) for m in warn_msg.args):
+        new_args = []
+        for m in warn_msg.args:
+            new_args.append(
+                compat.ascii_escaped(m) if isinstance(m, compat.UNICODE_TYPES) else m
+            )
+        unicode_warning = list(warn_msg.args) != new_args
+        warn_msg.args = new_args
+
+    msg = warnings.formatwarning(
+        warn_msg,
+        warning_message.category,
+        warning_message.filename,
+        warning_message.lineno,
+        warning_message.line,
+    )
+    if unicode_warning:
+        warnings.warn(
+            "Warning is using unicode non convertible to ascii, "
+            "converting to a safe representation:\n  {!r}".format(compat.safe_str(msg)),
+            UnicodeWarning,
+        )
+    return msg
+
+
+@pytest.hookimpl(hookwrapper=True, tryfirst=True)
+def pytest_runtest_protocol(item):
+    with catch_warnings_for_item(
+        config=item.config, ihook=item.ihook, when="runtest", item=item
+    ):
+        yield
+
+
+@pytest.hookimpl(hookwrapper=True, tryfirst=True)
+def pytest_collection(session):
+    config = session.config
+    with catch_warnings_for_item(
+        config=config, ihook=config.hook, when="collect", item=None
+    ):
+        yield
+
+
+@pytest.hookimpl(hookwrapper=True)
+def pytest_terminal_summary(terminalreporter):
+    config = terminalreporter.config
+    with catch_warnings_for_item(
+        config=config, ihook=config.hook, when="config", item=None
+    ):
+        yield
+
+
+def _issue_warning_captured(warning, hook, stacklevel):
+    """
+    This function should be used instead of calling ``warnings.warn`` directly when we are in the "configure" stage:
+    at this point the actual options might not have been set, so we manually trigger the pytest_warning_captured
+    hook so we can display this warnings in the terminal. This is a hack until we can sort out #2891.
+
+    :param warning: the warning instance.
+    :param hook: the hook caller
+    :param stacklevel: stacklevel forwarded to warnings.warn
+    """
+    with warnings.catch_warnings(record=True) as records:
+        warnings.simplefilter("always", type(warning))
+        warnings.warn(warning, stacklevel=stacklevel)
+    hook.pytest_warning_captured.call_historic(
+        kwargs=dict(warning_message=records[0], when="config", item=None)
+    )
diff --git a/contrib/python/pytest/py2/pytest.py b/contrib/python/pytest/py2/pytest.py
new file mode 100644
index 0000000000..ccc77b476f
--- /dev/null
+++ b/contrib/python/pytest/py2/pytest.py
@@ -0,0 +1,107 @@
+# -*- coding: utf-8 -*-
+# PYTHON_ARGCOMPLETE_OK
+"""
+pytest: unit and functional testing with Python.
+"""
+# else we are imported
+from _pytest import __version__
+from _pytest.assertion import register_assert_rewrite
+from _pytest.config import cmdline
+from _pytest.config import hookimpl
+from _pytest.config import hookspec
+from _pytest.config import main
+from _pytest.config import UsageError
+from _pytest.debugging import pytestPDB as __pytestPDB
+from _pytest.fixtures import fillfixtures as _fillfuncargs
+from _pytest.fixtures import fixture
+from _pytest.fixtures import yield_fixture
+from _pytest.freeze_support import freeze_includes
+from _pytest.main import Session
+from _pytest.mark import MARK_GEN as mark
+from _pytest.mark import param
+from _pytest.nodes import Collector
+from _pytest.nodes import File
+from _pytest.nodes import Item
+from _pytest.outcomes import exit
+from _pytest.outcomes import fail
+from _pytest.outcomes import importorskip
+from _pytest.outcomes import skip
+from _pytest.outcomes import xfail
+from _pytest.python import Class
+from _pytest.python import Function
+from _pytest.python import Instance
+from _pytest.python import Module
+from _pytest.python import Package
+from _pytest.python_api import approx
+from _pytest.python_api import raises
+from _pytest.recwarn import deprecated_call
+from _pytest.recwarn import warns
+from _pytest.warning_types import PytestAssertRewriteWarning
+from _pytest.warning_types import PytestCacheWarning
+from _pytest.warning_types import PytestCollectionWarning
+from _pytest.warning_types import PytestConfigWarning
+from _pytest.warning_types import PytestDeprecationWarning
+from _pytest.warning_types import PytestExperimentalApiWarning
+from _pytest.warning_types import PytestUnhandledCoroutineWarning
+from _pytest.warning_types import PytestUnknownMarkWarning
+from _pytest.warning_types import PytestWarning
+from _pytest.warning_types import RemovedInPytest4Warning
+
+set_trace = __pytestPDB.set_trace
+
+__all__ = [
+    "__version__",
+    "_fillfuncargs",
+    "approx",
+    "Class",
+    "cmdline",
+    "Collector",
+    "deprecated_call",
+    "exit",
+    "fail",
+    "File",
+    "fixture",
+    "freeze_includes",
+    "Function",
+    "hookimpl",
+    "hookspec",
+    "importorskip",
+    "Instance",
+    "Item",
+    "main",
+    "mark",
+    "Module",
+    "Package",
+    "param",
+    "PytestAssertRewriteWarning",
+    "PytestCacheWarning",
+    "PytestCollectionWarning",
+    "PytestConfigWarning",
+    "PytestDeprecationWarning",
+    "PytestExperimentalApiWarning",
+    "PytestUnhandledCoroutineWarning",
+    "PytestUnknownMarkWarning",
+    "PytestWarning",
+    "raises",
+    "register_assert_rewrite",
+    "RemovedInPytest4Warning",
+    "Session",
+    "set_trace",
+    "skip",
+    "UsageError",
+    "warns",
+    "xfail",
+    "yield_fixture",
+]
+
+if __name__ == "__main__":
+    # if run as a script or by 'python -m pytest'
+    # we trigger the below "else" condition by the following import
+    import pytest
+
+    raise SystemExit(pytest.main())
+else:
+
+    from _pytest.compat import _setup_collect_fakemodule
+
+    _setup_collect_fakemodule()
diff --git a/contrib/python/pytest/py2/ya.make b/contrib/python/pytest/py2/ya.make
new file mode 100644
index 0000000000..9d2292bd0f
--- /dev/null
+++ b/contrib/python/pytest/py2/ya.make
@@ -0,0 +1,97 @@
+# Generated by devtools/yamaker (pypi).
+
+PY2_LIBRARY()
+
+VERSION(4.6.11)
+
+LICENSE(MIT)
+
+PEERDIR(
+    contrib/python/atomicwrites
+    contrib/python/attrs
+    contrib/python/funcsigs
+    contrib/python/importlib-metadata
+    contrib/python/more-itertools
+    contrib/python/packaging
+    contrib/python/pathlib2
+    contrib/python/pluggy
+    contrib/python/py
+    contrib/python/six
+    contrib/python/wcwidth
+)
+
+NO_LINT()
+
+NO_CHECK_IMPORTS(
+    _pytest.*
+)
+
+PY_SRCS(
+    TOP_LEVEL
+    _pytest/__init__.py
+    _pytest/_argcomplete.py
+    _pytest/_code/__init__.py
+    _pytest/_code/_py2traceback.py
+    _pytest/_code/code.py
+    _pytest/_code/source.py
+    _pytest/_io/__init__.py
+    _pytest/_io/saferepr.py
+    _pytest/_version.py
+    _pytest/assertion/__init__.py
+    _pytest/assertion/rewrite.py
+    _pytest/assertion/truncate.py
+    _pytest/assertion/util.py
+    _pytest/cacheprovider.py
+    _pytest/capture.py
+    _pytest/compat.py
+    _pytest/config/__init__.py
+    _pytest/config/argparsing.py
+    _pytest/config/exceptions.py
+    _pytest/config/findpaths.py
+    _pytest/debugging.py
+    _pytest/deprecated.py
+    _pytest/doctest.py
+    _pytest/fixtures.py
+    _pytest/freeze_support.py
+    _pytest/helpconfig.py
+    _pytest/hookspec.py
+    _pytest/junitxml.py
+    _pytest/logging.py
+    _pytest/main.py
+    _pytest/mark/__init__.py
+    _pytest/mark/evaluate.py
+    _pytest/mark/legacy.py
+    _pytest/mark/structures.py
+    _pytest/monkeypatch.py
+    _pytest/nodes.py
+    _pytest/nose.py
+    _pytest/outcomes.py
+    _pytest/pastebin.py
+    _pytest/pathlib.py
+    _pytest/pytester.py
+    _pytest/python.py
+    _pytest/python_api.py
+    _pytest/recwarn.py
+    _pytest/reports.py
+    _pytest/resultlog.py
+    _pytest/runner.py
+    _pytest/setuponly.py
+    _pytest/setupplan.py
+    _pytest/skipping.py
+    _pytest/stepwise.py
+    _pytest/terminal.py
+    _pytest/tmpdir.py
+    _pytest/unittest.py
+    _pytest/warning_types.py
+    _pytest/warnings.py
+    pytest.py
+)
+
+RESOURCE_FILES(
+    PREFIX contrib/python/pytest/py2/
+    .dist-info/METADATA
+    .dist-info/entry_points.txt
+    .dist-info/top_level.txt
+)
+
+END()
diff --git a/contrib/python/pytest/py3/.dist-info/METADATA b/contrib/python/pytest/py3/.dist-info/METADATA
new file mode 100644
index 0000000000..8e45f6d805
--- /dev/null
+++ b/contrib/python/pytest/py3/.dist-info/METADATA
@@ -0,0 +1,222 @@
+Metadata-Version: 2.1
+Name: pytest
+Version: 7.4.2
+Summary: pytest: simple powerful testing with Python
+Home-page: https://docs.pytest.org/en/latest/
+Author: Holger Krekel, Bruno Oliveira, Ronny Pfannschmidt, Floris Bruynooghe, Brianna Laugher, Florian Bruhin and others
+License: MIT
+Project-URL: Changelog, https://docs.pytest.org/en/stable/changelog.html
+Project-URL: Twitter, https://twitter.com/pytestdotorg
+Project-URL: Source, https://github.com/pytest-dev/pytest
+Project-URL: Tracker, https://github.com/pytest-dev/pytest/issues
+Keywords: test,unittest
+Platform: unix
+Platform: linux
+Platform: osx
+Platform: cygwin
+Platform: win32
+Classifier: Development Status :: 6 - Mature
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: MIT License
+Classifier: Operating System :: MacOS :: MacOS X
+Classifier: Operating System :: Microsoft :: Windows
+Classifier: Operating System :: POSIX
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3 :: Only
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Programming Language :: Python :: 3.8
+Classifier: Programming Language :: Python :: 3.9
+Classifier: Programming Language :: Python :: 3.10
+Classifier: Programming Language :: Python :: 3.11
+Classifier: Programming Language :: Python :: 3.12
+Classifier: Topic :: Software Development :: Libraries
+Classifier: Topic :: Software Development :: Testing
+Classifier: Topic :: Utilities
+Requires-Python: >=3.7
+Description-Content-Type: text/x-rst
+License-File: LICENSE
+Requires-Dist: iniconfig
+Requires-Dist: packaging
+Requires-Dist: pluggy <2.0,>=0.12
+Requires-Dist: exceptiongroup >=1.0.0rc8 ; python_version < "3.11"
+Requires-Dist: tomli >=1.0.0 ; python_version < "3.11"
+Requires-Dist: importlib-metadata >=0.12 ; python_version < "3.8"
+Requires-Dist: colorama ; sys_platform == "win32"
+Provides-Extra: testing
+Requires-Dist: argcomplete ; extra == 'testing'
+Requires-Dist: attrs >=19.2.0 ; extra == 'testing'
+Requires-Dist: hypothesis >=3.56 ; extra == 'testing'
+Requires-Dist: mock ; extra == 'testing'
+Requires-Dist: nose ; extra == 'testing'
+Requires-Dist: pygments >=2.7.2 ; extra == 'testing'
+Requires-Dist: requests ; extra == 'testing'
+Requires-Dist: setuptools ; extra == 'testing'
+Requires-Dist: xmlschema ; extra == 'testing'
+
+.. image:: https://github.com/pytest-dev/pytest/raw/main/doc/en/img/pytest_logo_curves.svg
+   :target: https://docs.pytest.org/en/stable/
+   :align: center
+   :height: 200
+   :alt: pytest
+
+
+------
+
+.. image:: https://img.shields.io/pypi/v/pytest.svg
+    :target: https://pypi.org/project/pytest/
+
+.. image:: https://img.shields.io/conda/vn/conda-forge/pytest.svg
+    :target: https://anaconda.org/conda-forge/pytest
+
+.. image:: https://img.shields.io/pypi/pyversions/pytest.svg
+    :target: https://pypi.org/project/pytest/
+
+.. image:: https://codecov.io/gh/pytest-dev/pytest/branch/main/graph/badge.svg
+    :target: https://codecov.io/gh/pytest-dev/pytest
+    :alt: Code coverage Status
+
+.. image:: https://github.com/pytest-dev/pytest/workflows/test/badge.svg
+    :target: https://github.com/pytest-dev/pytest/actions?query=workflow%3Atest
+
+.. image:: https://results.pre-commit.ci/badge/github/pytest-dev/pytest/main.svg
+   :target: https://results.pre-commit.ci/latest/github/pytest-dev/pytest/main
+   :alt: pre-commit.ci status
+
+.. image:: https://img.shields.io/badge/code%20style-black-000000.svg
+    :target: https://github.com/psf/black
+
+.. image:: https://www.codetriage.com/pytest-dev/pytest/badges/users.svg
+    :target: https://www.codetriage.com/pytest-dev/pytest
+
+.. image:: https://readthedocs.org/projects/pytest/badge/?version=latest
+    :target: https://pytest.readthedocs.io/en/latest/?badge=latest
+    :alt: Documentation Status
+
+.. image:: https://img.shields.io/badge/Discord-pytest--dev-blue
+    :target: https://discord.com/invite/pytest-dev
+    :alt: Discord
+
+.. image:: https://img.shields.io/badge/Libera%20chat-%23pytest-orange
+    :target: https://web.libera.chat/#pytest
+    :alt: Libera chat
+
+
+The ``pytest`` framework makes it easy to write small tests, yet
+scales to support complex functional testing for applications and libraries.
+
+An example of a simple test:
+
+.. code-block:: python
+
+    # content of test_sample.py
+    def inc(x):
+        return x + 1
+
+
+    def test_answer():
+        assert inc(3) == 5
+
+
+To execute it::
+
+    $ pytest
+    ============================= test session starts =============================
+    collected 1 items
+
+    test_sample.py F
+
+    ================================== FAILURES ===================================
+    _________________________________ test_answer _________________________________
+
+        def test_answer():
+    >       assert inc(3) == 5
+    E       assert 4 == 5
+    E        +  where 4 = inc(3)
+
+    test_sample.py:5: AssertionError
+    ========================== 1 failed in 0.04 seconds ===========================
+
+
+Due to ``pytest``'s detailed assertion introspection, only plain ``assert`` statements are used. See `getting-started <https://docs.pytest.org/en/stable/getting-started.html#our-first-test-run>`_ for more examples.
+
+
+Features
+--------
+
+- Detailed info on failing `assert statements <https://docs.pytest.org/en/stable/how-to/assert.html>`_ (no need to remember ``self.assert*`` names)
+
+- `Auto-discovery
+  <https://docs.pytest.org/en/stable/explanation/goodpractices.html#python-test-discovery>`_
+  of test modules and functions
+
+- `Modular fixtures <https://docs.pytest.org/en/stable/explanation/fixtures.html>`_ for
+  managing small or parametrized long-lived test resources
+
+- Can run `unittest <https://docs.pytest.org/en/stable/how-to/unittest.html>`_ (or trial),
+  `nose <https://docs.pytest.org/en/stable/how-to/nose.html>`_ test suites out of the box
+
+- Python 3.7+ or PyPy3
+
+- Rich plugin architecture, with over 850+ `external plugins <https://docs.pytest.org/en/latest/reference/plugin_list.html>`_ and thriving community
+
+
+Documentation
+-------------
+
+For full documentation, including installation, tutorials and PDF documents, please see https://docs.pytest.org/en/stable/.
+
+
+Bugs/Requests
+-------------
+
+Please use the `GitHub issue tracker <https://github.com/pytest-dev/pytest/issues>`_ to submit bugs or request features.
+
+
+Changelog
+---------
+
+Consult the `Changelog <https://docs.pytest.org/en/stable/changelog.html>`__ page for fixes and enhancements of each version.
+
+
+Support pytest
+--------------
+
+`Open Collective`_ is an online funding platform for open and transparent communities.
+It provides tools to raise money and share your finances in full transparency.
+
+It is the platform of choice for individuals and companies that want to make one-time or
+monthly donations directly to the project.
+
+See more details in the `pytest collective`_.
+
+.. _Open Collective: https://opencollective.com
+.. _pytest collective: https://opencollective.com/pytest
+
+
+pytest for enterprise
+---------------------
+
+Available as part of the Tidelift Subscription.
+
+The maintainers of pytest and thousands of other packages are working with Tidelift to deliver commercial support and
+maintenance for the open source dependencies you use to build your applications.
+Save time, reduce risk, and improve code health, while paying the maintainers of the exact dependencies you use.
+
+`Learn more. <https://tidelift.com/subscription/pkg/pypi-pytest?utm_source=pypi-pytest&utm_medium=referral&utm_campaign=enterprise&utm_term=repo>`_
+
+Security
+^^^^^^^^
+
+pytest has never been associated with a security vulnerability, but in any case, to report a
+security vulnerability please use the `Tidelift security contact <https://tidelift.com/security>`_.
+Tidelift will coordinate the fix and disclosure.
+
+
+License
+-------
+
+Copyright Holger Krekel and others, 2004.
+
+Distributed under the terms of the `MIT`_ license, pytest is free and open source software.
+
+.. _`MIT`: https://github.com/pytest-dev/pytest/blob/main/LICENSE
diff --git a/contrib/python/pytest/py3/.dist-info/entry_points.txt b/contrib/python/pytest/py3/.dist-info/entry_points.txt
new file mode 100644
index 0000000000..192205dfa5
--- /dev/null
+++ b/contrib/python/pytest/py3/.dist-info/entry_points.txt
@@ -0,0 +1,3 @@
+[console_scripts]
+py.test = pytest:console_main
+pytest = pytest:console_main
diff --git a/contrib/python/pytest/py3/.dist-info/top_level.txt b/contrib/python/pytest/py3/.dist-info/top_level.txt
new file mode 100644
index 0000000000..3084ae51ec
--- /dev/null
+++ b/contrib/python/pytest/py3/.dist-info/top_level.txt
@@ -0,0 +1,3 @@
+_pytest
+py
+pytest
diff --git a/contrib/python/pytest/py3/AUTHORS b/contrib/python/pytest/py3/AUTHORS
new file mode 100644
index 0000000000..e8456d92b3
--- /dev/null
+++ b/contrib/python/pytest/py3/AUTHORS
@@ -0,0 +1,410 @@
+Holger Krekel, holger at merlinux eu
+merlinux GmbH, Germany, office at merlinux eu
+
+Contributors include::
+
+Aaron Coleman
+Abdeali JK
+Abdelrahman Elbehery
+Abhijeet Kasurde
+Adam Johnson
+Adam Stewart
+Adam Uhlir
+Ahn Ki-Wook
+Akiomi Kamakura
+Alan Velasco
+Alessio Izzo
+Alex Jones
+Alex Lambson
+Alexander Johnson
+Alexander King
+Alexei Kozlenok
+Alice Purcell
+Allan Feldman
+Aly Sivji
+Amir Elkess
+Anatoly Bubenkoff
+Anders Hovmöller
+Andras Mitzki
+Andras Tim
+Andrea Cimatoribus
+Andreas Motl
+Andreas Zeidler
+Andrew Shapton
+Andrey Paramonov
+Andrzej Klajnert
+Andrzej Ostrowski
+Andy Freeland
+Anthon van der Neut
+Anthony Shaw
+Anthony Sottile
+Anton Grinevich
+Anton Lodder
+Antony Lee
+Arel Cordero
+Arias Emmanuel
+Ariel Pillemer
+Armin Rigo
+Aron Coyle
+Aron Curzon
+Ashish Kurmi
+Aviral Verma
+Aviv Palivoda
+Babak Keyvani
+Barney Gale
+Ben Gartner
+Ben Webb
+Benjamin Peterson
+Bernard Pratz
+Bob Ippolito
+Brian Dorsey
+Brian Larsen
+Brian Maissy
+Brian Okken
+Brianna Laugher
+Bruno Oliveira
+Cal Jacobson
+Cal Leeming
+Carl Friedrich Bolz
+Carlos Jenkins
+Ceridwen
+Charles Cloud
+Charles Machalow
+Charnjit SiNGH (CCSJ)
+Cheuk Ting Ho
+Chris Mahoney
+Chris Lamb
+Chris NeJame
+Chris Rose
+Chris Wheeler
+Christian Boelsen
+Christian Fetzer
+Christian Neumüller
+Christian Theunert
+Christian Tismer
+Christine Mecklenborg
+Christoph Buelter
+Christopher Dignam
+Christopher Gilling
+Claire Cecil
+Claudio Madotto
+CrazyMerlyn
+Cristian Vera
+Cyrus Maden
+Damian Skrzypczak
+Daniel Grana
+Daniel Hahler
+Daniel Nuri
+Daniel Sánchez Castelló
+Daniel Valenzuela Zenteno
+Daniel Wandschneider
+Daniele Procida
+Danielle Jenkins
+Daniil Galiev
+Dave Hunt
+David Díaz-Barquero
+David Mohr
+David Paul Röthlisberger
+David Szotten
+David Vierra
+Daw-Ran Liou
+Debi Mishra
+Denis Kirisov
+Denivy Braiam Rück
+Dhiren Serai
+Diego Russo
+Dmitry Dygalo
+Dmitry Pribysh
+Dominic Mortlock
+Duncan Betts
+Edison Gustavo Muenz
+Edoardo Batini
+Edson Tadeu M. Manoel
+Eduardo Schettino
+Eli Boyarski
+Elizaveta Shashkova
+Éloi Rivard
+Endre Galaczi
+Eric Hunsberger
+Eric Liu
+Eric Siegerman
+Erik Aronesty
+Erik M. Bray
+Evan Kepner
+Evgeny Seliverstov
+Fabien Zarifian
+Fabio Zadrozny
+Felix Hofstätter
+Felix Nieuwenhuizen
+Feng Ma
+Florian Bruhin
+Florian Dahlitz
+Floris Bruynooghe
+Gabriel Landau
+Gabriel Reis
+Garvit Shubham
+Gene Wood
+George Kussumoto
+Georgy Dyuldin
+Gergely Kalmár
+Gleb Nikonorov
+Graeme Smecher
+Graham Horler
+Greg Price
+Gregory Lee
+Grig Gheorghiu
+Grigorii Eremeev (budulianin)
+Guido Wesdorp
+Guoqiang Zhang
+Harald Armin Massa
+Harshna
+Henk-Jaap Wagenaar
+Holger Kohr
+Hugo van Kemenade
+Hui Wang (coldnight)
+Ian Bicking
+Ian Lesperance
+Ilya Konstantinov
+Ionuț Turturică
+Isaac Virshup
+Israel Fruchter
+Itxaso Aizpurua
+Iwan Briquemont
+Jaap Broekhuizen
+Jake VanderPlas
+Jakob van Santen
+Jakub Mitoraj
+James Bourbeau
+Jan Balster
+Janne Vanhala
+Jason R. Coombs
+Javier Domingo Cansino
+Javier Romero
+Jeff Rackauckas
+Jeff Widman
+Jenni Rinker
+John Eddie Ayson
+John Litborn
+John Towler
+Jon Parise
+Jon Sonesen
+Jonas Obrist
+Jordan Guymon
+Jordan Moldow
+Jordan Speicher
+Joseph Hunkeler
+Josh Karpel
+Joshua Bronson
+Jurko Gospodnetić
+Justice Ndou
+Justyna Janczyszyn
+Kale Kundert
+Kamran Ahmad
+Kenny Y
+Karl O. Pinc
+Karthikeyan Singaravelan
+Katarzyna Jachim
+Katarzyna Król
+Katerina Koukiou
+Keri Volans
+Kevin C
+Kevin Cox
+Kevin Hierro Carrasco
+Kevin J. Foley
+Kian Eliasi
+Kian-Meng Ang
+Kodi B. Arfer
+Kojo Idrissa
+Kostis Anagnostopoulos
+Kristoffer Nordström
+Kyle Altendorf
+Lawrence Mitchell
+Lee Kamentsky
+Lev Maximov
+Lewis Cowles
+Llandy Riveron Del Risco
+Loic Esteve
+Lukas Bednar
+Luke Murphy
+Maciek Fijalkowski
+Maho
+Maik Figura
+Mandeep Bhutani
+Manuel Krebber
+Marc Schlaich
+Marcelo Duarte Trevisani
+Marcin Bachry
+Marco Gorelli
+Mark Abramowitz
+Mark Dickinson
+Marko Pacak
+Markus Unterwaditzer
+Martijn Faassen
+Martin Altmayer
+Martin K. Scherer
+Martin Prusse
+Mathieu Clabaut
+Matt Bachmann
+Matt Duck
+Matt Williams
+Matthias Hafner
+Maxim Filipenko
+Maximilian Cosmo Sitter
+mbyt
+Michael Aquilina
+Michael Birtwell
+Michael Droettboom
+Michael Goerz
+Michael Krebs
+Michael Seifert
+Michal Wajszczuk
+Michał Zięba
+Mickey Pashov
+Mihai Capotă
+Mike Hoyle (hoylemd)
+Mike Lundy
+Miro Hrončok
+Nathaniel Compton
+Nathaniel Waisbrot
+Ned Batchelder
+Neven Mundar
+Nicholas Devenish
+Nicholas Murphy
+Niclas Olofsson
+Nicolas Delaby
+Nikolay Kondratyev
+Nipunn Koorapati
+Oleg Pidsadnyi
+Oleg Sushchenko
+Olga Matoula
+Oliver Bestwalter
+Omar Kohl
+Omer Hadari
+Ondřej Súkup
+Oscar Benjamin
+Parth Patel
+Patrick Hayes
+Paul Müller
+Paul Reece
+Pauli Virtanen
+Pavel Karateev
+Paweł Adamczak
+Pedro Algarvio
+Petter Strandmark
+Philipp Loose
+Pierre Sassoulas
+Pieter Mulder
+Piotr Banaszkiewicz
+Piotr Helm
+Prakhar Gurunani
+Prashant Anand
+Prashant Sharma
+Pulkit Goyal
+Punyashloka Biswal
+Quentin Pradet
+q0w
+Ralf Schmitt
+Ralph Giles
+Ram Rachum
+Ran Benita
+Raphael Castaneda
+Raphael Pierzina
+Rafal Semik
+Raquel Alegre
+Ravi Chandra
+Robert Holt
+Roberto Aldera
+Roberto Polli
+Roland Puntaier
+Romain Dorgueil
+Roman Bolshakov
+Ronny Pfannschmidt
+Ross Lawley
+Ruaridh Williamson
+Russel Winder
+Ryan Wooden
+Saiprasad Kale
+Samuel Colvin
+Samuel Dion-Girardeau
+Samuel Searles-Bryant
+Samuele Pedroni
+Sanket Duthade
+Sankt Petersbug
+Saravanan Padmanaban
+Segev Finer
+Serhii Mozghovyi
+Seth Junot
+Shantanu Jain
+Shubham Adep
+Simon Gomizelj
+Simon Holesch
+Simon Kerr
+Skylar Downes
+Srinivas Reddy Thatiparthy
+Stefaan Lippens
+Stefan Farmbauer
+Stefan Scherfke
+Stefan Zimmermann
+Stefanie Molin
+Stefano Taschini
+Steffen Allner
+Stephan Obermann
+Sven-Hendrik Haase
+Sylvain Marié
+Tadek Teleżyński
+Takafumi Arakaki
+Taneli Hukkinen
+Tanvi Mehta
+Tarcisio Fischer
+Tareq Alayan
+Tatiana Ovary
+Ted Xiao
+Terje Runde
+Thomas Grainger
+Thomas Hisch
+Tim Hoffmann
+Tim Strazny
+TJ Bruno
+Tobias Diez
+Tom Dalton
+Tom Viner
+Tomáš Gavenčiak
+Tomer Keren
+Tony Narlock
+Tor Colvin
+Trevor Bekolay
+Tyler Goodlet
+Tyler Smart
+Tzu-ping Chung
+Vasily Kuznetsov
+Victor Maryama
+Victor Rodriguez
+Victor Uriarte
+Vidar T. Fauske
+Vijay Arora
+Virgil Dupras
+Vitaly Lashmanov
+Vivaan Verma
+Vlad Dragos
+Vlad Radziuk
+Vladyslav Rachek
+Volodymyr Piskun
+Wei Lin
+Wil Cooley
+William Lee
+Wim Glenn
+Wouter van Ackooy
+Xixi Zhao
+Xuan Luong
+Xuecong Liao
+Yannick Péroux
+Yoav Caspi
+Yuliang Shao
+Yusuke Kadowaki
+Yuval Shimon
+Zac Hatfield-Dodds
+Zachary Kneupper
+Zachary OBrien
+Zhouxin Qiu
+Zoltán Máté
+Zsolt Cserna
diff --git a/contrib/python/pytest/py3/LICENSE b/contrib/python/pytest/py3/LICENSE
new file mode 100644
index 0000000000..c3f1657fce
--- /dev/null
+++ b/contrib/python/pytest/py3/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2004 Holger Krekel and others
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/contrib/python/pytest/py3/README.rst b/contrib/python/pytest/py3/README.rst
new file mode 100644
index 0000000000..034034a40b
--- /dev/null
+++ b/contrib/python/pytest/py3/README.rst
@@ -0,0 +1,167 @@
+.. image:: https://github.com/pytest-dev/pytest/raw/main/doc/en/img/pytest_logo_curves.svg
+   :target: https://docs.pytest.org/en/stable/
+   :align: center
+   :height: 200
+   :alt: pytest
+
+
+------
+
+.. image:: https://img.shields.io/pypi/v/pytest.svg
+    :target: https://pypi.org/project/pytest/
+
+.. image:: https://img.shields.io/conda/vn/conda-forge/pytest.svg
+    :target: https://anaconda.org/conda-forge/pytest
+
+.. image:: https://img.shields.io/pypi/pyversions/pytest.svg
+    :target: https://pypi.org/project/pytest/
+
+.. image:: https://codecov.io/gh/pytest-dev/pytest/branch/main/graph/badge.svg
+    :target: https://codecov.io/gh/pytest-dev/pytest
+    :alt: Code coverage Status
+
+.. image:: https://github.com/pytest-dev/pytest/workflows/test/badge.svg
+    :target: https://github.com/pytest-dev/pytest/actions?query=workflow%3Atest
+
+.. image:: https://results.pre-commit.ci/badge/github/pytest-dev/pytest/main.svg
+   :target: https://results.pre-commit.ci/latest/github/pytest-dev/pytest/main
+   :alt: pre-commit.ci status
+
+.. image:: https://img.shields.io/badge/code%20style-black-000000.svg
+    :target: https://github.com/psf/black
+
+.. image:: https://www.codetriage.com/pytest-dev/pytest/badges/users.svg
+    :target: https://www.codetriage.com/pytest-dev/pytest
+
+.. image:: https://readthedocs.org/projects/pytest/badge/?version=latest
+    :target: https://pytest.readthedocs.io/en/latest/?badge=latest
+    :alt: Documentation Status
+
+.. image:: https://img.shields.io/badge/Discord-pytest--dev-blue
+    :target: https://discord.com/invite/pytest-dev
+    :alt: Discord
+
+.. image:: https://img.shields.io/badge/Libera%20chat-%23pytest-orange
+    :target: https://web.libera.chat/#pytest
+    :alt: Libera chat
+
+
+The ``pytest`` framework makes it easy to write small tests, yet
+scales to support complex functional testing for applications and libraries.
+
+An example of a simple test:
+
+.. code-block:: python
+
+    # content of test_sample.py
+    def inc(x):
+        return x + 1
+
+
+    def test_answer():
+        assert inc(3) == 5
+
+
+To execute it::
+
+    $ pytest
+    ============================= test session starts =============================
+    collected 1 items
+
+    test_sample.py F
+
+    ================================== FAILURES ===================================
+    _________________________________ test_answer _________________________________
+
+        def test_answer():
+    >       assert inc(3) == 5
+    E       assert 4 == 5
+    E        +  where 4 = inc(3)
+
+    test_sample.py:5: AssertionError
+    ========================== 1 failed in 0.04 seconds ===========================
+
+
+Due to ``pytest``'s detailed assertion introspection, only plain ``assert`` statements are used. See `getting-started <https://docs.pytest.org/en/stable/getting-started.html#our-first-test-run>`_ for more examples.
+
+
+Features
+--------
+
+- Detailed info on failing `assert statements <https://docs.pytest.org/en/stable/how-to/assert.html>`_ (no need to remember ``self.assert*`` names)
+
+- `Auto-discovery
+  <https://docs.pytest.org/en/stable/explanation/goodpractices.html#python-test-discovery>`_
+  of test modules and functions
+
+- `Modular fixtures <https://docs.pytest.org/en/stable/explanation/fixtures.html>`_ for
+  managing small or parametrized long-lived test resources
+
+- Can run `unittest <https://docs.pytest.org/en/stable/how-to/unittest.html>`_ (or trial),
+  `nose <https://docs.pytest.org/en/stable/how-to/nose.html>`_ test suites out of the box
+
+- Python 3.7+ or PyPy3
+
+- Rich plugin architecture, with over 850+ `external plugins <https://docs.pytest.org/en/latest/reference/plugin_list.html>`_ and thriving community
+
+
+Documentation
+-------------
+
+For full documentation, including installation, tutorials and PDF documents, please see https://docs.pytest.org/en/stable/.
+
+
+Bugs/Requests
+-------------
+
+Please use the `GitHub issue tracker <https://github.com/pytest-dev/pytest/issues>`_ to submit bugs or request features.
+
+
+Changelog
+---------
+
+Consult the `Changelog <https://docs.pytest.org/en/stable/changelog.html>`__ page for fixes and enhancements of each version.
+
+
+Support pytest
+--------------
+
+`Open Collective`_ is an online funding platform for open and transparent communities.
+It provides tools to raise money and share your finances in full transparency.
+
+It is the platform of choice for individuals and companies that want to make one-time or
+monthly donations directly to the project.
+
+See more details in the `pytest collective`_.
+
+.. _Open Collective: https://opencollective.com
+.. _pytest collective: https://opencollective.com/pytest
+
+
+pytest for enterprise
+---------------------
+
+Available as part of the Tidelift Subscription.
+
+The maintainers of pytest and thousands of other packages are working with Tidelift to deliver commercial support and
+maintenance for the open source dependencies you use to build your applications.
+Save time, reduce risk, and improve code health, while paying the maintainers of the exact dependencies you use.
+
+`Learn more. <https://tidelift.com/subscription/pkg/pypi-pytest?utm_source=pypi-pytest&utm_medium=referral&utm_campaign=enterprise&utm_term=repo>`_
+
+Security
+^^^^^^^^
+
+pytest has never been associated with a security vulnerability, but in any case, to report a
+security vulnerability please use the `Tidelift security contact <https://tidelift.com/security>`_.
+Tidelift will coordinate the fix and disclosure.
+
+
+License
+-------
+
+Copyright Holger Krekel and others, 2004.
+
+Distributed under the terms of the `MIT`_ license, pytest is free and open source software.
+
+.. _`MIT`: https://github.com/pytest-dev/pytest/blob/main/LICENSE
diff --git a/contrib/python/pytest/py3/_pytest/__init__.py b/contrib/python/pytest/py3/_pytest/__init__.py
new file mode 100644
index 0000000000..8a406c5c75
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/__init__.py
@@ -0,0 +1,9 @@
+__all__ = ["__version__", "version_tuple"]
+
+try:
+    from ._version import version as __version__, version_tuple
+except ImportError:  # pragma: no cover
+    # broken installation, we don't even try
+    # unknown only works because we do poor mans version compare
+    __version__ = "unknown"
+    version_tuple = (0, 0, "unknown")  # type:ignore[assignment]
diff --git a/contrib/python/pytest/py3/_pytest/_argcomplete.py b/contrib/python/pytest/py3/_pytest/_argcomplete.py
new file mode 100644
index 0000000000..6a8083770a
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/_argcomplete.py
@@ -0,0 +1,116 @@
+"""Allow bash-completion for argparse with argcomplete if installed.
+
+Needs argcomplete>=0.5.6 for python 3.2/3.3 (older versions fail
+to find the magic string, so _ARGCOMPLETE env. var is never set, and
+this does not need special code).
+
+Function try_argcomplete(parser) should be called directly before
+the call to ArgumentParser.parse_args().
+
+The filescompleter is what you normally would use on the positional
+arguments specification, in order to get "dirname/" after "dirn<TAB>"
+instead of the default "dirname ":
+
+   optparser.add_argument(Config._file_or_dir, nargs='*').completer=filescompleter
+
+Other, application specific, completers should go in the file
+doing the add_argument calls as they need to be specified as .completer
+attributes as well. (If argcomplete is not installed, the function the
+attribute points to will not be used).
+
+SPEEDUP
+=======
+
+The generic argcomplete script for bash-completion
+(/etc/bash_completion.d/python-argcomplete.sh)
+uses a python program to determine startup script generated by pip.
+You can speed up completion somewhat by changing this script to include
+  # PYTHON_ARGCOMPLETE_OK
+so the python-argcomplete-check-easy-install-script does not
+need to be called to find the entry point of the code and see if that is
+marked  with PYTHON_ARGCOMPLETE_OK.
+
+INSTALL/DEBUGGING
+=================
+
+To include this support in another application that has setup.py generated
+scripts:
+
+- Add the line:
+    # PYTHON_ARGCOMPLETE_OK
+  near the top of the main python entry point.
+
+- Include in the file calling parse_args():
+    from _argcomplete import try_argcomplete, filescompleter
+  Call try_argcomplete just before parse_args(), and optionally add
+  filescompleter to the positional arguments' add_argument().
+
+If things do not work right away:
+
+- Switch on argcomplete debugging with (also helpful when doing custom
+  completers):
+    export _ARC_DEBUG=1
+
+- Run:
+    python-argcomplete-check-easy-install-script $(which appname)
+    echo $?
+  will echo 0 if the magic line has been found, 1 if not.
+
+- Sometimes it helps to find early on errors using:
+    _ARGCOMPLETE=1 _ARC_DEBUG=1 appname
+  which should throw a KeyError: 'COMPLINE' (which is properly set by the
+  global argcomplete script).
+"""
+import argparse
+import os
+import sys
+from glob import glob
+from typing import Any
+from typing import List
+from typing import Optional
+
+
+class FastFilesCompleter:
+    """Fast file completer class."""
+
+    def __init__(self, directories: bool = True) -> None:
+        self.directories = directories
+
+    def __call__(self, prefix: str, **kwargs: Any) -> List[str]:
+        # Only called on non option completions.
+        if os.sep in prefix[1:]:
+            prefix_dir = len(os.path.dirname(prefix) + os.sep)
+        else:
+            prefix_dir = 0
+        completion = []
+        globbed = []
+        if "*" not in prefix and "?" not in prefix:
+            # We are on unix, otherwise no bash.
+            if not prefix or prefix[-1] == os.sep:
+                globbed.extend(glob(prefix + ".*"))
+            prefix += "*"
+        globbed.extend(glob(prefix))
+        for x in sorted(globbed):
+            if os.path.isdir(x):
+                x += "/"
+            # Append stripping the prefix (like bash, not like compgen).
+            completion.append(x[prefix_dir:])
+        return completion
+
+
+if os.environ.get("_ARGCOMPLETE"):
+    try:
+        import argcomplete.completers
+    except ImportError:
+        sys.exit(-1)
+    filescompleter: Optional[FastFilesCompleter] = FastFilesCompleter()
+
+    def try_argcomplete(parser: argparse.ArgumentParser) -> None:
+        argcomplete.autocomplete(parser, always_complete_options=False)
+
+else:
+
+    def try_argcomplete(parser: argparse.ArgumentParser) -> None:
+        pass
+
+    filescompleter = None
diff --git a/contrib/python/pytest/py3/_pytest/_code/__init__.py b/contrib/python/pytest/py3/_pytest/_code/__init__.py
new file mode 100644
index 0000000000..511d0dde66
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/_code/__init__.py
@@ -0,0 +1,22 @@
+"""Python inspection/code generation API."""
+from .code import Code
+from .code import ExceptionInfo
+from .code import filter_traceback
+from .code import Frame
+from .code import getfslineno
+from .code import Traceback
+from .code import TracebackEntry
+from .source import getrawcode
+from .source import Source
+
+__all__ = [
+    "Code",
+    "ExceptionInfo",
+    "filter_traceback",
+    "Frame",
+    "getfslineno",
+    "getrawcode",
+    "Traceback",
+    "TracebackEntry",
+    "Source",
+]
diff --git a/contrib/python/pytest/py3/_pytest/_code/code.py b/contrib/python/pytest/py3/_pytest/_code/code.py
new file mode 100644
index 0000000000..9b051332ba
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/_code/code.py
@@ -0,0 +1,1337 @@
+import ast
+import dataclasses
+import inspect
+import os
+import re
+import sys
+import traceback
+from inspect import CO_VARARGS
+from inspect import CO_VARKEYWORDS
+from io import StringIO
+from pathlib import Path
+from traceback import format_exception_only
+from types import CodeType
+from types import FrameType
+from types import TracebackType
+from typing import Any
+from typing import Callable
+from typing import ClassVar
+from typing import Dict
+from typing import Generic
+from typing import Iterable
+from typing import List
+from typing import Mapping
+from typing import Optional
+from typing import overload
+from typing import Pattern
+from typing import Sequence
+from typing import Set
+from typing import Tuple
+from typing import Type
+from typing import TYPE_CHECKING
+from typing import TypeVar
+from typing import Union
+
+import pluggy
+
+import _pytest
+from _pytest._code.source import findsource
+from _pytest._code.source import getrawcode
+from _pytest._code.source import getstatementrange_ast
+from _pytest._code.source import Source
+from _pytest._io import TerminalWriter
+from _pytest._io.saferepr import safeformat
+from _pytest._io.saferepr import saferepr
+from _pytest.compat import final
+from _pytest.compat import get_real_func
+from _pytest.deprecated import check_ispytest
+from _pytest.pathlib import absolutepath
+from _pytest.pathlib import bestrelpath
+
+if TYPE_CHECKING:
+    from typing_extensions import Final
+    from typing_extensions import Literal
+    from typing_extensions import SupportsIndex
+
+    _TracebackStyle = Literal["long", "short", "line", "no", "native", "value", "auto"]
+
+if sys.version_info[:2] < (3, 11):
+    from exceptiongroup import BaseExceptionGroup
+
+
+class Code:
+    """Wrapper around Python code objects."""
+
+    __slots__ = ("raw",)
+
+    def __init__(self, obj: CodeType) -> None:
+        self.raw = obj
+
+    @classmethod
+    def from_function(cls, obj: object) -> "Code":
+        return cls(getrawcode(obj))
+
+    def __eq__(self, other):
+        return self.raw == other.raw
+
+    # Ignore type because of https://github.com/python/mypy/issues/4266.
+    __hash__ = None  # type: ignore
+
+    @property
+    def firstlineno(self) -> int:
+        return self.raw.co_firstlineno - 1
+
+    @property
+    def name(self) -> str:
+        return self.raw.co_name
+
+    @property
+    def path(self) -> Union[Path, str]:
+        """Return a path object pointing to source code, or an ``str`` in
+        case of ``OSError`` / non-existing file."""
+        if not self.raw.co_filename:
+            return ""
+        try:
+            p = absolutepath(self.raw.co_filename)
+            # maybe don't try this checking
+            if not p.exists():
+                raise OSError("path check failed.")
+            return p
+        except OSError:
+            # XXX maybe try harder like the weird logic
+            # in the standard lib [linecache.updatecache] does?
+            return self.raw.co_filename
+
+    @property
+    def fullsource(self) -> Optional["Source"]:
+        """Return a _pytest._code.Source object for the full source file of the code."""
+        full, _ = findsource(self.raw)
+        return full
+
+    def source(self) -> "Source":
+        """Return a _pytest._code.Source object for the code object's source only."""
+        # return source only for that part of code
+        return Source(self.raw)
+
+    def getargs(self, var: bool = False) -> Tuple[str, ...]:
+        """Return a tuple with the argument names for the code object.
+
+        If 'var' is set True also return the names of the variable and
+        keyword arguments when present.
+        """
+        # Handy shortcut for getting args.
+        raw = self.raw
+        argcount = raw.co_argcount
+        if var:
+            argcount += raw.co_flags & CO_VARARGS
+            argcount += raw.co_flags & CO_VARKEYWORDS
+        return raw.co_varnames[:argcount]
+
+
+class Frame:
+    """Wrapper around a Python frame holding f_locals and f_globals
+    in which expressions can be evaluated."""
+
+    __slots__ = ("raw",)
+
+    def __init__(self, frame: FrameType) -> None:
+        self.raw = frame
+
+    @property
+    def lineno(self) -> int:
+        return self.raw.f_lineno - 1
+
+    @property
+    def f_globals(self) -> Dict[str, Any]:
+        return self.raw.f_globals
+
+    @property
+    def f_locals(self) -> Dict[str, Any]:
+        return self.raw.f_locals
+
+    @property
+    def code(self) -> Code:
+        return Code(self.raw.f_code)
+
+    @property
+    def statement(self) -> "Source":
+        """Statement this frame is at."""
+        if self.code.fullsource is None:
+            return Source("")
+        return self.code.fullsource.getstatement(self.lineno)
+
+    def eval(self, code, **vars):
+        """Evaluate 'code' in the frame.
+
+        'vars' are optional additional local variables.
+
+        Returns the result of the evaluation.
+        """
+        f_locals = self.f_locals.copy()
+        f_locals.update(vars)
+        return eval(code, self.f_globals, f_locals)
+
+    def repr(self, object: object) -> str:
+        """Return a 'safe' (non-recursive, one-line) string repr for 'object'."""
+        return saferepr(object)
+
+    def getargs(self, var: bool = False):
+        """Return a list of tuples (name, value) for all arguments.
+
+        If 'var' is set True, also include the variable and keyword arguments
+        when present.
+        """
+        retval = []
+        for arg in self.code.getargs(var):
+            try:
+                retval.append((arg, self.f_locals[arg]))
+            except KeyError:
+                pass  # this can occur when using Psyco
+        return retval
+
+
+class TracebackEntry:
+    """A single entry in a Traceback."""
+
+    __slots__ = ("_rawentry", "_repr_style")
+
+    def __init__(
+        self,
+        rawentry: TracebackType,
+        repr_style: Optional['Literal["short", "long"]'] = None,
+    ) -> None:
+        self._rawentry: "Final" = rawentry
+        self._repr_style: "Final" = repr_style
+
+    def with_repr_style(
+        self, repr_style: Optional['Literal["short", "long"]']
+    ) -> "TracebackEntry":
+        return TracebackEntry(self._rawentry, repr_style)
+
+    @property
+    def lineno(self) -> int:
+        return self._rawentry.tb_lineno - 1
+
+    @property
+    def frame(self) -> Frame:
+        return Frame(self._rawentry.tb_frame)
+
+    @property
+    def relline(self) -> int:
+        return self.lineno - self.frame.code.firstlineno
+
+    def __repr__(self) -> str:
+        return "<TracebackEntry %s:%d>" % (self.frame.code.path, self.lineno + 1)
+
+    @property
+    def statement(self) -> "Source":
+        """_pytest._code.Source object for the current statement."""
+        source = self.frame.code.fullsource
+        assert source is not None
+        return source.getstatement(self.lineno)
+
+    @property
+    def path(self) -> Union[Path, str]:
+        """Path to the source code."""
+        return self.frame.code.path
+
+    @property
+    def locals(self) -> Dict[str, Any]:
+        """Locals of underlying frame."""
+        return self.frame.f_locals
+
+    def getfirstlinesource(self) -> int:
+        return self.frame.code.firstlineno
+
+    def getsource(
+        self, astcache: Optional[Dict[Union[str, Path], ast.AST]] = None
+    ) -> Optional["Source"]:
+        """Return failing source code."""
+        # we use the passed in astcache to not reparse asttrees
+        # within exception info printing
+        source = self.frame.code.fullsource
+        if source is None:
+            return None
+        key = astnode = None
+        if astcache is not None:
+            key = self.frame.code.path
+            if key is not None:
+                astnode = astcache.get(key, None)
+        start = self.getfirstlinesource()
+        try:
+            astnode, _, end = getstatementrange_ast(
+                self.lineno, source, astnode=astnode
+            )
+        except SyntaxError:
+            end = self.lineno + 1
+        else:
+            if key is not None and astcache is not None:
+                astcache[key] = astnode
+        return source[start:end]
+
+    source = property(getsource)
+
+    def ishidden(self, excinfo: Optional["ExceptionInfo[BaseException]"]) -> bool:
+        """Return True if the current frame has a var __tracebackhide__
+        resolving to True.
+
+        If __tracebackhide__ is a callable, it gets called with the
+        ExceptionInfo instance and can decide whether to hide the traceback.
+
+        Mostly for internal use.
+        """
+        tbh: Union[
+            bool, Callable[[Optional[ExceptionInfo[BaseException]]], bool]
+        ] = False
+        for maybe_ns_dct in (self.frame.f_locals, self.frame.f_globals):
+            # in normal cases, f_locals and f_globals are dictionaries
+            # however via `exec(...)` / `eval(...)` they can be other types
+            # (even incorrect types!).
+            # as such, we suppress all exceptions while accessing __tracebackhide__
+            try:
+                tbh = maybe_ns_dct["__tracebackhide__"]
+            except Exception:
+                pass
+            else:
+                break
+        if tbh and callable(tbh):
+            return tbh(excinfo)
+        return tbh
+
+    def __str__(self) -> str:
+        name = self.frame.code.name
+        try:
+            line = str(self.statement).lstrip()
+        except KeyboardInterrupt:
+            raise
+        except BaseException:
+            line = "???"
+        # This output does not quite match Python's repr for traceback entries,
+        # but changing it to do so would break certain plugins.  See
+        # https://github.com/pytest-dev/pytest/pull/7535/ for details.
+        return "  File %r:%d in %s\n  %s\n" % (
+            str(self.path),
+            self.lineno + 1,
+            name,
+            line,
+        )
+
+    @property
+    def name(self) -> str:
+        """co_name of underlying code."""
+        return self.frame.code.raw.co_name
+
+
+class Traceback(List[TracebackEntry]):
+    """Traceback objects encapsulate and offer higher level access to Traceback entries."""
+
+    def __init__(
+        self,
+        tb: Union[TracebackType, Iterable[TracebackEntry]],
+    ) -> None:
+        """Initialize from given python traceback object and ExceptionInfo."""
+        if isinstance(tb, TracebackType):
+
+            def f(cur: TracebackType) -> Iterable[TracebackEntry]:
+                cur_: Optional[TracebackType] = cur
+                while cur_ is not None:
+                    yield TracebackEntry(cur_)
+                    cur_ = cur_.tb_next
+
+            super().__init__(f(tb))
+        else:
+            super().__init__(tb)
+
+    def cut(
+        self,
+        path: Optional[Union["os.PathLike[str]", str]] = None,
+        lineno: Optional[int] = None,
+        firstlineno: Optional[int] = None,
+        excludepath: Optional["os.PathLike[str]"] = None,
+    ) -> "Traceback":
+        """Return a Traceback instance wrapping part of this Traceback.
+
+        By providing any combination of path, lineno and firstlineno, the
+        first frame to start the to-be-returned traceback is determined.
+
+        This allows cutting the first part of a Traceback instance e.g.
+        for formatting reasons (removing some uninteresting bits that deal
+        with handling of the exception/traceback).
+        """
+        path_ = None if path is None else os.fspath(path)
+        excludepath_ = None if excludepath is None else os.fspath(excludepath)
+        for x in self:
+            code = x.frame.code
+            codepath = code.path
+            if path is not None and str(codepath) != path_:
+                continue
+            if (
+                excludepath is not None
+                and isinstance(codepath, Path)
+                and excludepath_ in (str(p) for p in codepath.parents)  # type: ignore[operator]
+            ):
+                continue
+            if lineno is not None and x.lineno != lineno:
+                continue
+            if firstlineno is not None and x.frame.code.firstlineno != firstlineno:
+                continue
+            return Traceback(x._rawentry)
+        return self
+
+    @overload
+    def __getitem__(self, key: "SupportsIndex") -> TracebackEntry:
+        ...
+
+    @overload
+    def __getitem__(self, key: slice) -> "Traceback":
+        ...
+
+    def __getitem__(
+        self, key: Union["SupportsIndex", slice]
+    ) -> Union[TracebackEntry, "Traceback"]:
+        if isinstance(key, slice):
+            return self.__class__(super().__getitem__(key))
+        else:
+            return super().__getitem__(key)
+
+    def filter(
+        self,
+        # TODO(py38): change to positional only.
+        _excinfo_or_fn: Union[
+            "ExceptionInfo[BaseException]",
+            Callable[[TracebackEntry], bool],
+        ],
+    ) -> "Traceback":
+        """Return a Traceback instance with certain items removed.
+
+        If the filter is an `ExceptionInfo`, removes all the ``TracebackEntry``s
+        which are hidden (see ishidden() above).
+
+        Otherwise, the filter is a function that gets a single argument, a
+        ``TracebackEntry`` instance, and should return True when the item should
+        be added to the ``Traceback``, False when not.
+        """
+        if isinstance(_excinfo_or_fn, ExceptionInfo):
+            fn = lambda x: not x.ishidden(_excinfo_or_fn)  # noqa: E731
+        else:
+            fn = _excinfo_or_fn
+        return Traceback(filter(fn, self))
+
+    def recursionindex(self) -> Optional[int]:
+        """Return the index of the frame/TracebackEntry where recursion originates if
+        appropriate, None if no recursion occurred."""
+        cache: Dict[Tuple[Any, int, int], List[Dict[str, Any]]] = {}
+        for i, entry in enumerate(self):
+            # id for the code.raw is needed to work around
+            # the strange metaprogramming in the decorator lib from pypi
+            # which generates code objects that have hash/value equality
+            # XXX needs a test
+            key = entry.frame.code.path, id(entry.frame.code.raw), entry.lineno
+            # print "checking for recursion at", key
+            values = cache.setdefault(key, [])
+            if values:
+                f = entry.frame
+                loc = f.f_locals
+                for otherloc in values:
+                    if otherloc == loc:
+                        return i
+            values.append(entry.frame.f_locals)
+        return None
+
+
+E = TypeVar("E", bound=BaseException, covariant=True)
+
+
+@final
+@dataclasses.dataclass
+class ExceptionInfo(Generic[E]):
+    """Wraps sys.exc_info() objects and offers help for navigating the traceback."""
+
+    _assert_start_repr: ClassVar = "AssertionError('assert "
+
+    _excinfo: Optional[Tuple[Type["E"], "E", TracebackType]]
+    _striptext: str
+    _traceback: Optional[Traceback]
+
+    def __init__(
+        self,
+        excinfo: Optional[Tuple[Type["E"], "E", TracebackType]],
+        striptext: str = "",
+        traceback: Optional[Traceback] = None,
+        *,
+        _ispytest: bool = False,
+    ) -> None:
+        check_ispytest(_ispytest)
+        self._excinfo = excinfo
+        self._striptext = striptext
+        self._traceback = traceback
+
+    @classmethod
+    def from_exception(
+        cls,
+        # Ignoring error: "Cannot use a covariant type variable as a parameter".
+        # This is OK to ignore because this class is (conceptually) readonly.
+        # See https://github.com/python/mypy/issues/7049.
+        exception: E,  # type: ignore[misc]
+        exprinfo: Optional[str] = None,
+    ) -> "ExceptionInfo[E]":
+        """Return an ExceptionInfo for an existing exception.
+
+        The exception must have a non-``None`` ``__traceback__`` attribute,
+        otherwise this function fails with an assertion error. This means that
+        the exception must have been raised, or added a traceback with the
+        :py:meth:`~BaseException.with_traceback()` method.
+
+        :param exprinfo:
+            A text string helping to determine if we should strip
+            ``AssertionError`` from the output. Defaults to the exception
+            message/``__str__()``.
+
+        .. versionadded:: 7.4
+        """
+        assert (
+            exception.__traceback__
+        ), "Exceptions passed to ExcInfo.from_exception(...) must have a non-None __traceback__."
+        exc_info = (type(exception), exception, exception.__traceback__)
+        return cls.from_exc_info(exc_info, exprinfo)
+
+    @classmethod
+    def from_exc_info(
+        cls,
+        exc_info: Tuple[Type[E], E, TracebackType],
+        exprinfo: Optional[str] = None,
+    ) -> "ExceptionInfo[E]":
+        """Like :func:`from_exception`, but using old-style exc_info tuple."""
+        _striptext = ""
+        if exprinfo is None and isinstance(exc_info[1], AssertionError):
+            exprinfo = getattr(exc_info[1], "msg", None)
+            if exprinfo is None:
+                exprinfo = saferepr(exc_info[1])
+            if exprinfo and exprinfo.startswith(cls._assert_start_repr):
+                _striptext = "AssertionError: "
+
+        return cls(exc_info, _striptext, _ispytest=True)
+
+    @classmethod
+    def from_current(
+        cls, exprinfo: Optional[str] = None
+    ) -> "ExceptionInfo[BaseException]":
+        """Return an ExceptionInfo matching the current traceback.
+
+        .. warning::
+
+            Experimental API
+
+        :param exprinfo:
+            A text string helping to determine if we should strip
+            ``AssertionError`` from the output. Defaults to the exception
+            message/``__str__()``.
+        """
+        tup = sys.exc_info()
+        assert tup[0] is not None, "no current exception"
+        assert tup[1] is not None, "no current exception"
+        assert tup[2] is not None, "no current exception"
+        exc_info = (tup[0], tup[1], tup[2])
+        return ExceptionInfo.from_exc_info(exc_info, exprinfo)
+
+    @classmethod
+    def for_later(cls) -> "ExceptionInfo[E]":
+        """Return an unfilled ExceptionInfo."""
+        return cls(None, _ispytest=True)
+
+    def fill_unfilled(self, exc_info: Tuple[Type[E], E, TracebackType]) -> None:
+        """Fill an unfilled ExceptionInfo created with ``for_later()``."""
+        assert self._excinfo is None, "ExceptionInfo was already filled"
+        self._excinfo = exc_info
+
+    @property
+    def type(self) -> Type[E]:
+        """The exception class."""
+        assert (
+            self._excinfo is not None
+        ), ".type can only be used after the context manager exits"
+        return self._excinfo[0]
+
+    @property
+    def value(self) -> E:
+        """The exception value."""
+        assert (
+            self._excinfo is not None
+        ), ".value can only be used after the context manager exits"
+        return self._excinfo[1]
+
+    @property
+    def tb(self) -> TracebackType:
+        """The exception raw traceback."""
+        assert (
+            self._excinfo is not None
+        ), ".tb can only be used after the context manager exits"
+        return self._excinfo[2]
+
+    @property
+    def typename(self) -> str:
+        """The type name of the exception."""
+        assert (
+            self._excinfo is not None
+        ), ".typename can only be used after the context manager exits"
+        return self.type.__name__
+
+    @property
+    def traceback(self) -> Traceback:
+        """The traceback."""
+        if self._traceback is None:
+            self._traceback = Traceback(self.tb)
+        return self._traceback
+
+    @traceback.setter
+    def traceback(self, value: Traceback) -> None:
+        self._traceback = value
+
+    def __repr__(self) -> str:
+        if self._excinfo is None:
+            return "<ExceptionInfo for raises contextmanager>"
+        return "<{} {} tblen={}>".format(
+            self.__class__.__name__, saferepr(self._excinfo[1]), len(self.traceback)
+        )
+
+    def exconly(self, tryshort: bool = False) -> str:
+        """Return the exception as a string.
+
+        When 'tryshort' resolves to True, and the exception is an
+        AssertionError, only the actual exception part of the exception
+        representation is returned (so 'AssertionError: ' is removed from
+        the beginning).
+        """
+        lines = format_exception_only(self.type, self.value)
+        text = "".join(lines)
+        text = text.rstrip()
+        if tryshort:
+            if text.startswith(self._striptext):
+                text = text[len(self._striptext) :]
+        return text
+
+    def errisinstance(
+        self, exc: Union[Type[BaseException], Tuple[Type[BaseException], ...]]
+    ) -> bool:
+        """Return True if the exception is an instance of exc.
+
+        Consider using ``isinstance(excinfo.value, exc)`` instead.
+        """
+        return isinstance(self.value, exc)
+
+    def _getreprcrash(self) -> Optional["ReprFileLocation"]:
+        # Find last non-hidden traceback entry that led to the exception of the
+        # traceback, or None if all hidden.
+        for i in range(-1, -len(self.traceback) - 1, -1):
+            entry = self.traceback[i]
+            if not entry.ishidden(self):
+                path, lineno = entry.frame.code.raw.co_filename, entry.lineno
+                exconly = self.exconly(tryshort=True)
+                return ReprFileLocation(path, lineno + 1, exconly)
+        return None
+
+    def getrepr(
+        self,
+        showlocals: bool = False,
+        style: "_TracebackStyle" = "long",
+        abspath: bool = False,
+        tbfilter: Union[
+            bool, Callable[["ExceptionInfo[BaseException]"], Traceback]
+        ] = True,
+        funcargs: bool = False,
+        truncate_locals: bool = True,
+        chain: bool = True,
+    ) -> Union["ReprExceptionInfo", "ExceptionChainRepr"]:
+        """Return str()able representation of this exception info.
+
+        :param bool showlocals:
+            Show locals per traceback entry.
+            Ignored if ``style=="native"``.
+
+        :param str style:
+            long|short|line|no|native|value traceback style.
+
+        :param bool abspath:
+            If paths should be changed to absolute or left unchanged.
+
+        :param tbfilter:
+            A filter for traceback entries.
+
+            * If false, don't hide any entries.
+            * If true, hide internal entries and entries that contain a local
+              variable ``__tracebackhide__ = True``.
+            * If a callable, delegates the filtering to the callable.
+
+            Ignored if ``style`` is ``"native"``.
+
+        :param bool funcargs:
+            Show fixtures ("funcargs" for legacy purposes) per traceback entry.
+
+        :param bool truncate_locals:
+            With ``showlocals==True``, make sure locals can be safely represented as strings.
+
+        :param bool chain:
+            If chained exceptions in Python 3 should be shown.
+
+        .. versionchanged:: 3.9
+
+            Added the ``chain`` parameter.
+        """
+        if style == "native":
+            return ReprExceptionInfo(
+                reprtraceback=ReprTracebackNative(
+                    traceback.format_exception(
+                        self.type,
+                        self.value,
+                        self.traceback[0]._rawentry if self.traceback else None,
+                    )
+                ),
+                reprcrash=self._getreprcrash(),
+            )
+
+        fmt = FormattedExcinfo(
+            showlocals=showlocals,
+            style=style,
+            abspath=abspath,
+            tbfilter=tbfilter,
+            funcargs=funcargs,
+            truncate_locals=truncate_locals,
+            chain=chain,
+        )
+        return fmt.repr_excinfo(self)
+
+    def match(self, regexp: Union[str, Pattern[str]]) -> "Literal[True]":
+        """Check whether the regular expression `regexp` matches the string
+        representation of the exception using :func:`python:re.search`.
+
+        If it matches `True` is returned, otherwise an `AssertionError` is raised.
+        """
+        __tracebackhide__ = True
+        value = str(self.value)
+        msg = f"Regex pattern did not match.\n Regex: {regexp!r}\n Input: {value!r}"
+        if regexp == value:
+            msg += "\n Did you mean to `re.escape()` the regex?"
+        assert re.search(regexp, value), msg
+        # Return True to allow for "assert excinfo.match()".
+        return True
+
+
+@dataclasses.dataclass
+class FormattedExcinfo:
+    """Presenting information about failing Functions and Generators."""
+
+    # for traceback entries
+    flow_marker: ClassVar = ">"
+    fail_marker: ClassVar = "E"
+
+    showlocals: bool = False
+    style: "_TracebackStyle" = "long"
+    abspath: bool = True
+    tbfilter: Union[bool, Callable[[ExceptionInfo[BaseException]], Traceback]] = True
+    funcargs: bool = False
+    truncate_locals: bool = True
+    chain: bool = True
+    astcache: Dict[Union[str, Path], ast.AST] = dataclasses.field(
+        default_factory=dict, init=False, repr=False
+    )
+
+    def _getindent(self, source: "Source") -> int:
+        # Figure out indent for the given source.
+        try:
+            s = str(source.getstatement(len(source) - 1))
+        except KeyboardInterrupt:
+            raise
+        except BaseException:
+            try:
+                s = str(source[-1])
+            except KeyboardInterrupt:
+                raise
+            except BaseException:
+                return 0
+        return 4 + (len(s) - len(s.lstrip()))
+
+    def _getentrysource(self, entry: TracebackEntry) -> Optional["Source"]:
+        source = entry.getsource(self.astcache)
+        if source is not None:
+            source = source.deindent()
+        return source
+
+    def repr_args(self, entry: TracebackEntry) -> Optional["ReprFuncArgs"]:
+        if self.funcargs:
+            args = []
+            for argname, argvalue in entry.frame.getargs(var=True):
+                args.append((argname, saferepr(argvalue)))
+            return ReprFuncArgs(args)
+        return None
+
+    def get_source(
+        self,
+        source: Optional["Source"],
+        line_index: int = -1,
+        excinfo: Optional[ExceptionInfo[BaseException]] = None,
+        short: bool = False,
+    ) -> List[str]:
+        """Return formatted and marked up source lines."""
+        lines = []
+        if source is not None and line_index < 0:
+            line_index += len(source)
+        if source is None or line_index >= len(source.lines) or line_index < 0:
+            # `line_index` could still be outside `range(len(source.lines))` if
+            # we're processing AST with pathological position attributes.
+            source = Source("???")
+            line_index = 0
+        space_prefix = "    "
+        if short:
+            lines.append(space_prefix + source.lines[line_index].strip())
+        else:
+            for line in source.lines[:line_index]:
+                lines.append(space_prefix + line)
+            lines.append(self.flow_marker + "   " + source.lines[line_index])
+            for line in source.lines[line_index + 1 :]:
+                lines.append(space_prefix + line)
+        if excinfo is not None:
+            indent = 4 if short else self._getindent(source)
+            lines.extend(self.get_exconly(excinfo, indent=indent, markall=True))
+        return lines
+
+    def get_exconly(
+        self,
+        excinfo: ExceptionInfo[BaseException],
+        indent: int = 4,
+        markall: bool = False,
+    ) -> List[str]:
+        lines = []
+        indentstr = " " * indent
+        # Get the real exception information out.
+        exlines = excinfo.exconly(tryshort=True).split("\n")
+        failindent = self.fail_marker + indentstr[1:]
+        for line in exlines:
+            lines.append(failindent + line)
+            if not markall:
+                failindent = indentstr
+        return lines
+
+    def repr_locals(self, locals: Mapping[str, object]) -> Optional["ReprLocals"]:
+        if self.showlocals:
+            lines = []
+            keys = [loc for loc in locals if loc[0] != "@"]
+            keys.sort()
+            for name in keys:
+                value = locals[name]
+                if name == "__builtins__":
+                    lines.append("__builtins__ = <builtins>")
+                else:
+                    # This formatting could all be handled by the
+                    # _repr() function, which is only reprlib.Repr in
+                    # disguise, so is very configurable.
+                    if self.truncate_locals:
+                        str_repr = saferepr(value)
+                    else:
+                        str_repr = safeformat(value)
+                    # if len(str_repr) < 70 or not isinstance(value, (list, tuple, dict)):
+                    lines.append(f"{name:<10} = {str_repr}")
+                    # else:
+                    #    self._line("%-10s =\\" % (name,))
+                    #    # XXX
+                    #    pprint.pprint(value, stream=self.excinfowriter)
+            return ReprLocals(lines)
+        return None
+
+    def repr_traceback_entry(
+        self,
+        entry: Optional[TracebackEntry],
+        excinfo: Optional[ExceptionInfo[BaseException]] = None,
+    ) -> "ReprEntry":
+        lines: List[str] = []
+        style = (
+            entry._repr_style
+            if entry is not None and entry._repr_style is not None
+            else self.style
+        )
+        if style in ("short", "long") and entry is not None:
+            source = self._getentrysource(entry)
+            if source is None:
+                source = Source("???")
+                line_index = 0
+            else:
+                line_index = entry.lineno - entry.getfirstlinesource()
+            short = style == "short"
+            reprargs = self.repr_args(entry) if not short else None
+            s = self.get_source(source, line_index, excinfo, short=short)
+            lines.extend(s)
+            if short:
+                message = "in %s" % (entry.name)
+            else:
+                message = excinfo and excinfo.typename or ""
+            entry_path = entry.path
+            path = self._makepath(entry_path)
+            reprfileloc = ReprFileLocation(path, entry.lineno + 1, message)
+            localsrepr = self.repr_locals(entry.locals)
+            return ReprEntry(lines, reprargs, localsrepr, reprfileloc, style)
+        elif style == "value":
+            if excinfo:
+                lines.extend(str(excinfo.value).split("\n"))
+            return ReprEntry(lines, None, None, None, style)
+        else:
+            if excinfo:
+                lines.extend(self.get_exconly(excinfo, indent=4))
+            return ReprEntry(lines, None, None, None, style)
+
+    def _makepath(self, path: Union[Path, str]) -> str:
+        if not self.abspath and isinstance(path, Path):
+            try:
+                np = bestrelpath(Path.cwd(), path)
+            except OSError:
+                return str(path)
+            if len(np) < len(str(path)):
+                return np
+        return str(path)
+
+    def repr_traceback(self, excinfo: ExceptionInfo[BaseException]) -> "ReprTraceback":
+        traceback = excinfo.traceback
+        if callable(self.tbfilter):
+            traceback = self.tbfilter(excinfo)
+        elif self.tbfilter:
+            traceback = traceback.filter(excinfo)
+
+        if isinstance(excinfo.value, RecursionError):
+            traceback, extraline = self._truncate_recursive_traceback(traceback)
+        else:
+            extraline = None
+
+        if not traceback:
+            if extraline is None:
+                extraline = "All traceback entries are hidden. Pass `--full-trace` to see hidden and internal frames."
+            entries = [self.repr_traceback_entry(None, excinfo)]
+            return ReprTraceback(entries, extraline, style=self.style)
+
+        last = traceback[-1]
+        if self.style == "value":
+            entries = [self.repr_traceback_entry(last, excinfo)]
+            return ReprTraceback(entries, None, style=self.style)
+
+        entries = [
+            self.repr_traceback_entry(entry, excinfo if last == entry else None)
+            for entry in traceback
+        ]
+        return ReprTraceback(entries, extraline, style=self.style)
+
+    def _truncate_recursive_traceback(
+        self, traceback: Traceback
+    ) -> Tuple[Traceback, Optional[str]]:
+        """Truncate the given recursive traceback trying to find the starting
+        point of the recursion.
+
+        The detection is done by going through each traceback entry and
+        finding the point in which the locals of the frame are equal to the
+        locals of a previous frame (see ``recursionindex()``).
+
+        Handle the situation where the recursion process might raise an
+        exception (for example comparing numpy arrays using equality raises a
+        TypeError), in which case we do our best to warn the user of the
+        error and show a limited traceback.
+        """
+        try:
+            recursionindex = traceback.recursionindex()
+        except Exception as e:
+            max_frames = 10
+            extraline: Optional[str] = (
+                "!!! Recursion error detected, but an error occurred locating the origin of recursion.\n"
+                "  The following exception happened when comparing locals in the stack frame:\n"
+                "    {exc_type}: {exc_msg}\n"
+                "  Displaying first and last {max_frames} stack frames out of {total}."
+            ).format(
+                exc_type=type(e).__name__,
+                exc_msg=str(e),
+                max_frames=max_frames,
+                total=len(traceback),
+            )
+            # Type ignored because adding two instances of a List subtype
+            # currently incorrectly has type List instead of the subtype.
+            traceback = traceback[:max_frames] + traceback[-max_frames:]  # type: ignore
+        else:
+            if recursionindex is not None:
+                extraline = "!!! Recursion detected (same locals & position)"
+                traceback = traceback[: recursionindex + 1]
+            else:
+                extraline = None
+
+        return traceback, extraline
+
+    def repr_excinfo(
+        self, excinfo: ExceptionInfo[BaseException]
+    ) -> "ExceptionChainRepr":
+        repr_chain: List[
+            Tuple[ReprTraceback, Optional[ReprFileLocation], Optional[str]]
+        ] = []
+        e: Optional[BaseException] = excinfo.value
+        excinfo_: Optional[ExceptionInfo[BaseException]] = excinfo
+        descr = None
+        seen: Set[int] = set()
+        while e is not None and id(e) not in seen:
+            seen.add(id(e))
+
+            if excinfo_:
+                # Fall back to native traceback as a temporary workaround until
+                # full support for exception groups added to ExceptionInfo.
+                # See https://github.com/pytest-dev/pytest/issues/9159
+                if isinstance(e, BaseExceptionGroup):
+                    reprtraceback: Union[
+                        ReprTracebackNative, ReprTraceback
+                    ] = ReprTracebackNative(
+                        traceback.format_exception(
+                            type(excinfo_.value),
+                            excinfo_.value,
+                            excinfo_.traceback[0]._rawentry,
+                        )
+                    )
+                else:
+                    reprtraceback = self.repr_traceback(excinfo_)
+                reprcrash = excinfo_._getreprcrash()
+            else:
+                # Fallback to native repr if the exception doesn't have a traceback:
+                # ExceptionInfo objects require a full traceback to work.
+                reprtraceback = ReprTracebackNative(
+                    traceback.format_exception(type(e), e, None)
+                )
+                reprcrash = None
+            repr_chain += [(reprtraceback, reprcrash, descr)]
+
+            if e.__cause__ is not None and self.chain:
+                e = e.__cause__
+                excinfo_ = ExceptionInfo.from_exception(e) if e.__traceback__ else None
+                descr = "The above exception was the direct cause of the following exception:"
+            elif (
+                e.__context__ is not None and not e.__suppress_context__ and self.chain
+            ):
+                e = e.__context__
+                excinfo_ = ExceptionInfo.from_exception(e) if e.__traceback__ else None
+                descr = "During handling of the above exception, another exception occurred:"
+            else:
+                e = None
+        repr_chain.reverse()
+        return ExceptionChainRepr(repr_chain)
+
+
+@dataclasses.dataclass(eq=False)
+class TerminalRepr:
+    def __str__(self) -> str:
+        # FYI this is called from pytest-xdist's serialization of exception
+        # information.
+        io = StringIO()
+        tw = TerminalWriter(file=io)
+        self.toterminal(tw)
+        return io.getvalue().strip()
+
+    def __repr__(self) -> str:
+        return f"<{self.__class__} instance at {id(self):0x}>"
+
+    def toterminal(self, tw: TerminalWriter) -> None:
+        raise NotImplementedError()
+
+
+# This class is abstract -- only subclasses are instantiated.
+@dataclasses.dataclass(eq=False)
+class ExceptionRepr(TerminalRepr):
+    # Provided by subclasses.
+    reprtraceback: "ReprTraceback"
+    reprcrash: Optional["ReprFileLocation"]
+    sections: List[Tuple[str, str, str]] = dataclasses.field(
+        init=False, default_factory=list
+    )
+
+    def addsection(self, name: str, content: str, sep: str = "-") -> None:
+        self.sections.append((name, content, sep))
+
+    def toterminal(self, tw: TerminalWriter) -> None:
+        for name, content, sep in self.sections:
+            tw.sep(sep, name)
+            tw.line(content)
+
+
+@dataclasses.dataclass(eq=False)
+class ExceptionChainRepr(ExceptionRepr):
+    chain: Sequence[Tuple["ReprTraceback", Optional["ReprFileLocation"], Optional[str]]]
+
+    def __init__(
+        self,
+        chain: Sequence[
+            Tuple["ReprTraceback", Optional["ReprFileLocation"], Optional[str]]
+        ],
+    ) -> None:
+        # reprcrash and reprtraceback of the outermost (the newest) exception
+        # in the chain.
+        super().__init__(
+            reprtraceback=chain[-1][0],
+            reprcrash=chain[-1][1],
+        )
+        self.chain = chain
+
+    def toterminal(self, tw: TerminalWriter) -> None:
+        for element in self.chain:
+            element[0].toterminal(tw)
+            if element[2] is not None:
+                tw.line("")
+                tw.line(element[2], yellow=True)
+        super().toterminal(tw)
+
+
+@dataclasses.dataclass(eq=False)
+class ReprExceptionInfo(ExceptionRepr):
+    reprtraceback: "ReprTraceback"
+    reprcrash: Optional["ReprFileLocation"]
+
+    def toterminal(self, tw: TerminalWriter) -> None:
+        self.reprtraceback.toterminal(tw)
+        super().toterminal(tw)
+
+
+@dataclasses.dataclass(eq=False)
+class ReprTraceback(TerminalRepr):
+    reprentries: Sequence[Union["ReprEntry", "ReprEntryNative"]]
+    extraline: Optional[str]
+    style: "_TracebackStyle"
+
+    entrysep: ClassVar = "_ "
+
+    def toterminal(self, tw: TerminalWriter) -> None:
+        # The entries might have different styles.
+        for i, entry in enumerate(self.reprentries):
+            if entry.style == "long":
+                tw.line("")
+            entry.toterminal(tw)
+            if i < len(self.reprentries) - 1:
+                next_entry = self.reprentries[i + 1]
+                if (
+                    entry.style == "long"
+                    or entry.style == "short"
+                    and next_entry.style == "long"
+                ):
+                    tw.sep(self.entrysep)
+
+        if self.extraline:
+            tw.line(self.extraline)
+
+
+class ReprTracebackNative(ReprTraceback):
+    def __init__(self, tblines: Sequence[str]) -> None:
+        self.reprentries = [ReprEntryNative(tblines)]
+        self.extraline = None
+        self.style = "native"
+
+
+@dataclasses.dataclass(eq=False)
+class ReprEntryNative(TerminalRepr):
+    lines: Sequence[str]
+
+    style: ClassVar["_TracebackStyle"] = "native"
+
+    def toterminal(self, tw: TerminalWriter) -> None:
+        tw.write("".join(self.lines))
+
+
+@dataclasses.dataclass(eq=False)
+class ReprEntry(TerminalRepr):
+    lines: Sequence[str]
+    reprfuncargs: Optional["ReprFuncArgs"]
+    reprlocals: Optional["ReprLocals"]
+    reprfileloc: Optional["ReprFileLocation"]
+    style: "_TracebackStyle"
+
+    def _write_entry_lines(self, tw: TerminalWriter) -> None:
+        """Write the source code portions of a list of traceback entries with syntax highlighting.
+
+        Usually entries are lines like these:
+
+            "     x = 1"
+            ">    assert x == 2"
+            "E    assert 1 == 2"
+
+        This function takes care of rendering the "source" portions of it (the lines without
+        the "E" prefix) using syntax highlighting, taking care to not highlighting the ">"
+        character, as doing so might break line continuations.
+        """
+
+        if not self.lines:
+            return
+
+        # separate indents and source lines that are not failures: we want to
+        # highlight the code but not the indentation, which may contain markers
+        # such as ">   assert 0"
+        fail_marker = f"{FormattedExcinfo.fail_marker}   "
+        indent_size = len(fail_marker)
+        indents: List[str] = []
+        source_lines: List[str] = []
+        failure_lines: List[str] = []
+        for index, line in enumerate(self.lines):
+            is_failure_line = line.startswith(fail_marker)
+            if is_failure_line:
+                # from this point on all lines are considered part of the failure
+                failure_lines.extend(self.lines[index:])
+                break
+            else:
+                if self.style == "value":
+                    source_lines.append(line)
+                else:
+                    indents.append(line[:indent_size])
+                    source_lines.append(line[indent_size:])
+
+        tw._write_source(source_lines, indents)
+
+        # failure lines are always completely red and bold
+        for line in failure_lines:
+            tw.line(line, bold=True, red=True)
+
+    def toterminal(self, tw: TerminalWriter) -> None:
+        if self.style == "short":
+            if self.reprfileloc:
+                self.reprfileloc.toterminal(tw)
+            self._write_entry_lines(tw)
+            if self.reprlocals:
+                self.reprlocals.toterminal(tw, indent=" " * 8)
+            return
+
+        if self.reprfuncargs:
+            self.reprfuncargs.toterminal(tw)
+
+        self._write_entry_lines(tw)
+
+        if self.reprlocals:
+            tw.line("")
+            self.reprlocals.toterminal(tw)
+        if self.reprfileloc:
+            if self.lines:
+                tw.line("")
+            self.reprfileloc.toterminal(tw)
+
+    def __str__(self) -> str:
+        return "{}\n{}\n{}".format(
+            "\n".join(self.lines), self.reprlocals, self.reprfileloc
+        )
+
+
+@dataclasses.dataclass(eq=False)
+class ReprFileLocation(TerminalRepr):
+    path: str
+    lineno: int
+    message: str
+
+    def __post_init__(self) -> None:
+        self.path = str(self.path)
+
+    def toterminal(self, tw: TerminalWriter) -> None:
+        # Filename and lineno output for each entry, using an output format
+        # that most editors understand.
+        msg = self.message
+        i = msg.find("\n")
+        if i != -1:
+            msg = msg[:i]
+        tw.write(self.path, bold=True, red=True)
+        tw.line(f":{self.lineno}: {msg}")
+
+
+@dataclasses.dataclass(eq=False)
+class ReprLocals(TerminalRepr):
+    lines: Sequence[str]
+
+    def toterminal(self, tw: TerminalWriter, indent="") -> None:
+        for line in self.lines:
+            tw.line(indent + line)
+
+
+@dataclasses.dataclass(eq=False)
+class ReprFuncArgs(TerminalRepr):
+    args: Sequence[Tuple[str, object]]
+
+    def toterminal(self, tw: TerminalWriter) -> None:
+        if self.args:
+            linesofar = ""
+            for name, value in self.args:
+                ns = f"{name} = {value}"
+                if len(ns) + len(linesofar) + 2 > tw.fullwidth:
+                    if linesofar:
+                        tw.line(linesofar)
+                    linesofar = ns
+                else:
+                    if linesofar:
+                        linesofar += ", " + ns
+                    else:
+                        linesofar = ns
+            if linesofar:
+                tw.line(linesofar)
+            tw.line("")
+
+
+def getfslineno(obj: object) -> Tuple[Union[str, Path], int]:
+    """Return source location (path, lineno) for the given object.
+
+    If the source cannot be determined return ("", -1).
+
+    The line number is 0-based.
+    """
+    # xxx let decorators etc specify a sane ordering
+    # NOTE: this used to be done in _pytest.compat.getfslineno, initially added
+    #       in 6ec13a2b9.  It ("place_as") appears to be something very custom.
+    obj = get_real_func(obj)
+    if hasattr(obj, "place_as"):
+        obj = obj.place_as  # type: ignore[attr-defined]
+
+    try:
+        code = Code.from_function(obj)
+    except TypeError:
+        try:
+            fn = inspect.getsourcefile(obj) or inspect.getfile(obj)  # type: ignore[arg-type]
+        except TypeError:
+            return "", -1
+
+        fspath = fn and absolutepath(fn) or ""
+        lineno = -1
+        if fspath:
+            try:
+                _, lineno = findsource(obj)
+            except OSError:
+                pass
+        return fspath, lineno
+
+    return code.path, code.firstlineno
+
+
+# Relative paths that we use to filter traceback entries from appearing to the user;
+# see filter_traceback.
+# note: if we need to add more paths than what we have now we should probably use a list
+# for better maintenance.
+
+_PLUGGY_DIR = Path(pluggy.__file__.rstrip("oc"))
+# pluggy is either a package or a single module depending on the version
+if _PLUGGY_DIR.name == "__init__.py":
+    _PLUGGY_DIR = _PLUGGY_DIR.parent
+_PYTEST_DIR = Path(_pytest.__file__).parent
+
+
+def filter_traceback(entry: TracebackEntry) -> bool:
+    """Return True if a TracebackEntry instance should be included in tracebacks.
+
+    We hide traceback entries of:
+
+    * dynamically generated code (no code to show up for it);
+    * internal traceback from pytest or its internal libraries, py and pluggy.
+    """
+    # entry.path might sometimes return a str object when the entry
+    # points to dynamically generated code.
+    # See https://bitbucket.org/pytest-dev/py/issues/71.
+    raw_filename = entry.frame.code.raw.co_filename
+    is_generated = "<" in raw_filename and ">" in raw_filename
+    if is_generated:
+        return False
+
+    # entry.path might point to a non-existing file, in which case it will
+    # also return a str object. See #1133.
+    p = Path(entry.path)
+
+    parents = p.parents
+    if _PLUGGY_DIR in parents:
+        return False
+    if _PYTEST_DIR in parents:
+        return False
+
+    return True
diff --git a/contrib/python/pytest/py3/_pytest/_code/source.py b/contrib/python/pytest/py3/_pytest/_code/source.py
new file mode 100644
index 0000000000..208cfb8003
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/_code/source.py
@@ -0,0 +1,217 @@
+import ast
+import inspect
+import textwrap
+import tokenize
+import types
+import warnings
+from bisect import bisect_right
+from typing import Iterable
+from typing import Iterator
+from typing import List
+from typing import Optional
+from typing import overload
+from typing import Tuple
+from typing import Union
+
+
+class Source:
+    """An immutable object holding a source code fragment.
+
+    When using Source(...), the source lines are deindented.
+    """
+
+    def __init__(self, obj: object = None) -> None:
+        if not obj:
+            self.lines: List[str] = []
+        elif isinstance(obj, Source):
+            self.lines = obj.lines
+        elif isinstance(obj, (tuple, list)):
+            self.lines = deindent(x.rstrip("\n") for x in obj)
+        elif isinstance(obj, str):
+            self.lines = deindent(obj.split("\n"))
+        else:
+            try:
+                rawcode = getrawcode(obj)
+                src = inspect.getsource(rawcode)
+            except TypeError:
+                src = inspect.getsource(obj)  # type: ignore[arg-type]
+            self.lines = deindent(src.split("\n"))
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, Source):
+            return NotImplemented
+        return self.lines == other.lines
+
+    # Ignore type because of https://github.com/python/mypy/issues/4266.
+    __hash__ = None  # type: ignore
+
+    @overload
+    def __getitem__(self, key: int) -> str:
+        ...
+
+    @overload
+    def __getitem__(self, key: slice) -> "Source":
+        ...
+
+    def __getitem__(self, key: Union[int, slice]) -> Union[str, "Source"]:
+        if isinstance(key, int):
+            return self.lines[key]
+        else:
+            if key.step not in (None, 1):
+                raise IndexError("cannot slice a Source with a step")
+            newsource = Source()
+            newsource.lines = self.lines[key.start : key.stop]
+            return newsource
+
+    def __iter__(self) -> Iterator[str]:
+        return iter(self.lines)
+
+    def __len__(self) -> int:
+        return len(self.lines)
+
+    def strip(self) -> "Source":
+        """Return new Source object with trailing and leading blank lines removed."""
+        start, end = 0, len(self)
+        while start < end and not self.lines[start].strip():
+            start += 1
+        while end > start and not self.lines[end - 1].strip():
+            end -= 1
+        source = Source()
+        source.lines[:] = self.lines[start:end]
+        return source
+
+    def indent(self, indent: str = " " * 4) -> "Source":
+        """Return a copy of the source object with all lines indented by the
+        given indent-string."""
+        newsource = Source()
+        newsource.lines = [(indent + line) for line in self.lines]
+        return newsource
+
+    def getstatement(self, lineno: int) -> "Source":
+        """Return Source statement which contains the given linenumber
+        (counted from 0)."""
+        start, end = self.getstatementrange(lineno)
+        return self[start:end]
+
+    def getstatementrange(self, lineno: int) -> Tuple[int, int]:
+        """Return (start, end) tuple which spans the minimal statement region
+        which containing the given lineno."""
+        if not (0 <= lineno < len(self)):
+            raise IndexError("lineno out of range")
+        ast, start, end = getstatementrange_ast(lineno, self)
+        return start, end
+
+    def deindent(self) -> "Source":
+        """Return a new Source object deindented."""
+        newsource = Source()
+        newsource.lines[:] = deindent(self.lines)
+        return newsource
+
+    def __str__(self) -> str:
+        return "\n".join(self.lines)
+
+
+#
+# helper functions
+#
+
+
+def findsource(obj) -> Tuple[Optional[Source], int]:
+    try:
+        sourcelines, lineno = inspect.findsource(obj)
+    except Exception:
+        return None, -1
+    source = Source()
+    source.lines = [line.rstrip() for line in sourcelines]
+    return source, lineno
+
+
+def getrawcode(obj: object, trycall: bool = True) -> types.CodeType:
+    """Return code object for given function."""
+    try:
+        return obj.__code__  # type: ignore[attr-defined,no-any-return]
+    except AttributeError:
+        pass
+    if trycall:
+        call = getattr(obj, "__call__", None)
+        if call and not isinstance(obj, type):
+            return getrawcode(call, trycall=False)
+    raise TypeError(f"could not get code object for {obj!r}")
+
+
+def deindent(lines: Iterable[str]) -> List[str]:
+    return textwrap.dedent("\n".join(lines)).splitlines()
+
+
+def get_statement_startend2(lineno: int, node: ast.AST) -> Tuple[int, Optional[int]]:
+    # Flatten all statements and except handlers into one lineno-list.
+    # AST's line numbers start indexing at 1.
+    values: List[int] = []
+    for x in ast.walk(node):
+        if isinstance(x, (ast.stmt, ast.ExceptHandler)):
+            # Before Python 3.8, the lineno of a decorated class or function pointed at the decorator.
+            # Since Python 3.8, the lineno points to the class/def, so need to include the decorators.
+            if isinstance(x, (ast.ClassDef, ast.FunctionDef, ast.AsyncFunctionDef)):
+                for d in x.decorator_list:
+                    values.append(d.lineno - 1)
+            values.append(x.lineno - 1)
+            for name in ("finalbody", "orelse"):
+                val: Optional[List[ast.stmt]] = getattr(x, name, None)
+                if val:
+                    # Treat the finally/orelse part as its own statement.
+                    values.append(val[0].lineno - 1 - 1)
+    values.sort()
+    insert_index = bisect_right(values, lineno)
+    start = values[insert_index - 1]
+    if insert_index >= len(values):
+        end = None
+    else:
+        end = values[insert_index]
+    return start, end
+
+
+def getstatementrange_ast(
+    lineno: int,
+    source: Source,
+    assertion: bool = False,
+    astnode: Optional[ast.AST] = None,
+) -> Tuple[ast.AST, int, int]:
+    if astnode is None:
+        content = str(source)
+        # See #4260:
+        # Don't produce duplicate warnings when compiling source to find AST.
+        with warnings.catch_warnings():
+            warnings.simplefilter("ignore")
+            astnode = ast.parse(content, "source", "exec")
+
+    start, end = get_statement_startend2(lineno, astnode)
+    # We need to correct the end:
+    # - ast-parsing strips comments
+    # - there might be empty lines
+    # - we might have lesser indented code blocks at the end
+    if end is None:
+        end = len(source.lines)
+
+    if end > start + 1:
+        # Make sure we don't span differently indented code blocks
+        # by using the BlockFinder helper used which inspect.getsource() uses itself.
+        block_finder = inspect.BlockFinder()
+        # If we start with an indented line, put blockfinder to "started" mode.
+        block_finder.started = source.lines[start][0].isspace()
+        it = ((x + "\n") for x in source.lines[start:end])
+        try:
+            for tok in tokenize.generate_tokens(lambda: next(it)):
+                block_finder.tokeneater(*tok)
+        except (inspect.EndOfBlock, IndentationError):
+            end = block_finder.last + start
+        except Exception:
+            pass
+
+    # The end might still point to a comment or empty line, correct it.
+    while end:
+        line = source.lines[end - 1].lstrip()
+        if line.startswith("#") or not line:
+            end -= 1
+        else:
+            break
+    return astnode, start, end
diff --git a/contrib/python/pytest/py3/_pytest/_io/__init__.py b/contrib/python/pytest/py3/_pytest/_io/__init__.py
new file mode 100644
index 0000000000..db001e918c
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/_io/__init__.py
@@ -0,0 +1,8 @@
+from .terminalwriter import get_terminal_width
+from .terminalwriter import TerminalWriter
+
+
+__all__ = [
+    "TerminalWriter",
+    "get_terminal_width",
+]
diff --git a/contrib/python/pytest/py3/_pytest/_io/saferepr.py b/contrib/python/pytest/py3/_pytest/_io/saferepr.py
new file mode 100644
index 0000000000..c701872238
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/_io/saferepr.py
@@ -0,0 +1,180 @@
+import pprint
+import reprlib
+from typing import Any
+from typing import Dict
+from typing import IO
+from typing import Optional
+
+
+def _try_repr_or_str(obj: object) -> str:
+    try:
+        return repr(obj)
+    except (KeyboardInterrupt, SystemExit):
+        raise
+    except BaseException:
+        return f'{type(obj).__name__}("{obj}")'
+
+
+def _format_repr_exception(exc: BaseException, obj: object) -> str:
+    try:
+        exc_info = _try_repr_or_str(exc)
+    except (KeyboardInterrupt, SystemExit):
+        raise
+    except BaseException as exc:
+        exc_info = f"unpresentable exception ({_try_repr_or_str(exc)})"
+    return "<[{} raised in repr()] {} object at 0x{:x}>".format(
+        exc_info, type(obj).__name__, id(obj)
+    )
+
+
+def _ellipsize(s: str, maxsize: int) -> str:
+    if len(s) > maxsize:
+        i = max(0, (maxsize - 3) // 2)
+        j = max(0, maxsize - 3 - i)
+        return s[:i] + "..." + s[len(s) - j :]
+    return s
+
+
+class SafeRepr(reprlib.Repr):
+    """
+    repr.Repr that limits the resulting size of repr() and includes
+    information on exceptions raised during the call.
+    """
+
+    def __init__(self, maxsize: Optional[int], use_ascii: bool = False) -> None:
+        """
+        :param maxsize:
+            If not None, will truncate the resulting repr to that specific size, using ellipsis
+            somewhere in the middle to hide the extra text.
+            If None, will not impose any size limits on the returning repr.
+        """
+        super().__init__()
+        # ``maxstring`` is used by the superclass, and needs to be an int; using a
+        # very large number in case maxsize is None, meaning we want to disable
+        # truncation.
+        self.maxstring = maxsize if maxsize is not None else 1_000_000_000
+        self.maxsize = maxsize
+        self.use_ascii = use_ascii
+
+    def repr(self, x: object) -> str:
+        try:
+            if self.use_ascii:
+                s = ascii(x)
+            else:
+                s = super().repr(x)
+
+        except (KeyboardInterrupt, SystemExit):
+            raise
+        except BaseException as exc:
+            s = _format_repr_exception(exc, x)
+        if self.maxsize is not None:
+            s = _ellipsize(s, self.maxsize)
+        return s
+
+    def repr_instance(self, x: object, level: int) -> str:
+        try:
+            s = repr(x)
+        except (KeyboardInterrupt, SystemExit):
+            raise
+        except BaseException as exc:
+            s = _format_repr_exception(exc, x)
+        if self.maxsize is not None:
+            s = _ellipsize(s, self.maxsize)
+        return s
+
+
+def safeformat(obj: object) -> str:
+    """Return a pretty printed string for the given object.
+
+    Failing __repr__ functions of user instances will be represented
+    with a short exception info.
+    """
+    try:
+        return pprint.pformat(obj)
+    except Exception as exc:
+        return _format_repr_exception(exc, obj)
+
+
+# Maximum size of overall repr of objects to display during assertion errors.
+DEFAULT_REPR_MAX_SIZE = 240
+
+
+def saferepr(
+    obj: object, maxsize: Optional[int] = DEFAULT_REPR_MAX_SIZE, use_ascii: bool = False
+) -> str:
+    """Return a size-limited safe repr-string for the given object.
+
+    Failing __repr__ functions of user instances will be represented
+    with a short exception info and 'saferepr' generally takes
+    care to never raise exceptions itself.
+
+    This function is a wrapper around the Repr/reprlib functionality of the
+    stdlib.
+    """
+
+    return SafeRepr(maxsize, use_ascii).repr(obj)
+
+
+def saferepr_unlimited(obj: object, use_ascii: bool = True) -> str:
+    """Return an unlimited-size safe repr-string for the given object.
+
+    As with saferepr, failing __repr__ functions of user instances
+    will be represented with a short exception info.
+
+    This function is a wrapper around simple repr.
+
+    Note: a cleaner solution would be to alter ``saferepr``this way
+    when maxsize=None, but that might affect some other code.
+    """
+    try:
+        if use_ascii:
+            return ascii(obj)
+        return repr(obj)
+    except Exception as exc:
+        return _format_repr_exception(exc, obj)
+
+
+class AlwaysDispatchingPrettyPrinter(pprint.PrettyPrinter):
+    """PrettyPrinter that always dispatches (regardless of width)."""
+
+    def _format(
+        self,
+        object: object,
+        stream: IO[str],
+        indent: int,
+        allowance: int,
+        context: Dict[int, Any],
+        level: int,
+    ) -> None:
+        # Type ignored because _dispatch is private.
+        p = self._dispatch.get(type(object).__repr__, None)  # type: ignore[attr-defined]
+
+        objid = id(object)
+        if objid in context or p is None:
+            # Type ignored because _format is private.
+            super()._format(  # type: ignore[misc]
+                object,
+                stream,
+                indent,
+                allowance,
+                context,
+                level,
+            )
+            return
+
+        context[objid] = 1
+        p(self, object, stream, indent, allowance, context, level + 1)
+        del context[objid]
+
+
+def _pformat_dispatch(
+    object: object,
+    indent: int = 1,
+    width: int = 80,
+    depth: Optional[int] = None,
+    *,
+    compact: bool = False,
+) -> str:
+    return AlwaysDispatchingPrettyPrinter(
+        indent=indent, width=width, depth=depth, compact=compact
+    ).pformat(object)
diff --git a/contrib/python/pytest/py3/_pytest/_io/terminalwriter.py b/contrib/python/pytest/py3/_pytest/_io/terminalwriter.py
new file mode 100644
index 0000000000..379035d858
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/_io/terminalwriter.py
@@ -0,0 +1,233 @@
+"""Helper functions for writing to terminals and files."""
+import os
+import shutil
+import sys
+from typing import Optional
+from typing import Sequence
+from typing import TextIO
+
+from .wcwidth import wcswidth
+from _pytest.compat import final
+
+
+# This code was initially copied from py 1.8.1, file _io/terminalwriter.py.
+
+
+def get_terminal_width() -> int:
+    width, _ = shutil.get_terminal_size(fallback=(80, 24))
+
+    # The Windows get_terminal_size may be bogus, let's sanify a bit.
+    if width < 40:
+        width = 80
+
+    return width
+
+
+def should_do_markup(file: TextIO) -> bool:
+    if os.environ.get("PY_COLORS") == "1":
+        return True
+    if os.environ.get("PY_COLORS") == "0":
+        return False
+    if "NO_COLOR" in os.environ:
+        return False
+    if "FORCE_COLOR" in os.environ:
+        return True
+    return (
+        hasattr(file, "isatty") and file.isatty() and os.environ.get("TERM") != "dumb"
+    )
+
+
+@final
+class TerminalWriter:
+    _esctable = dict(
+        black=30,
+        red=31,
+        green=32,
+        yellow=33,
+        blue=34,
+        purple=35,
+        cyan=36,
+        white=37,
+        Black=40,
+        Red=41,
+        Green=42,
+        Yellow=43,
+        Blue=44,
+        Purple=45,
+        Cyan=46,
+        White=47,
+        bold=1,
+        light=2,
+        blink=5,
+        invert=7,
+    )
+
+    def __init__(self, file: Optional[TextIO] = None) -> None:
+        if file is None:
+            file = sys.stdout
+        if hasattr(file, "isatty") and file.isatty() and sys.platform == "win32":
+            try:
+                import colorama
+            except ImportError:
+                pass
+            else:
+                file = colorama.AnsiToWin32(file).stream
+                assert file is not None
+        self._file = file
+        self.hasmarkup = should_do_markup(file)
+        self._current_line = ""
+        self._terminal_width: Optional[int] = None
+        self.code_highlight = True
+
+    @property
+    def fullwidth(self) -> int:
+        if self._terminal_width is not None:
+            return self._terminal_width
+        return get_terminal_width()
+
+    @fullwidth.setter
+    def fullwidth(self, value: int) -> None:
+        self._terminal_width = value
+
+    @property
+    def width_of_current_line(self) -> int:
+        """Return an estimate of the width so far in the current line."""
+        return wcswidth(self._current_line)
+
+    def markup(self, text: str, **markup: bool) -> str:
+        for name in markup:
+            if name not in self._esctable:
+                raise ValueError(f"unknown markup: {name!r}")
+        if self.hasmarkup:
+            esc = [self._esctable[name] for name, on in markup.items() if on]
+            if esc:
+                text = "".join("\x1b[%sm" % cod for cod in esc) + text + "\x1b[0m"
+        return text
+
+    def sep(
+        self,
+        sepchar: str,
+        title: Optional[str] = None,
+        fullwidth: Optional[int] = None,
+        **markup: bool,
+    ) -> None:
+        if fullwidth is None:
+            fullwidth = self.fullwidth
+        # The goal is to have the line be as long as possible
+        # under the condition that len(line) <= fullwidth.
+        if sys.platform == "win32":
+            # If we print in the last column on windows we are on a
+            # new line but there is no way to verify/neutralize this
+            # (we may not know the exact line width).
+            # So let's be defensive to avoid empty lines in the output.
+            fullwidth -= 1
+        if title is not None:
+            # we want 2 + 2*len(fill) + len(title) <= fullwidth
+            # i.e.    2 + 2*len(sepchar)*N + len(title) <= fullwidth
+            #         2*len(sepchar)*N <= fullwidth - len(title) - 2
+            #         N <= (fullwidth - len(title) - 2) // (2*len(sepchar))
+            N = max((fullwidth - len(title) - 2) // (2 * len(sepchar)), 1)
+            fill = sepchar * N
+            line = f"{fill} {title} {fill}"
+        else:
+            # we want len(sepchar)*N <= fullwidth
+            # i.e.    N <= fullwidth // len(sepchar)
+            line = sepchar * (fullwidth // len(sepchar))
+        # In some situations there is room for an extra sepchar at the right,
+        # in particular if we consider that with a sepchar like "_ " the
+        # trailing space is not important at the end of the line.
+        if len(line) + len(sepchar.rstrip()) <= fullwidth:
+            line += sepchar.rstrip()
+
+        self.line(line, **markup)
+
+    def write(self, msg: str, *, flush: bool = False, **markup: bool) -> None:
+        if msg:
+            current_line = msg.rsplit("\n", 1)[-1]
+            if "\n" in msg:
+                self._current_line = current_line
+            else:
+                self._current_line += current_line
+
+            msg = self.markup(msg, **markup)
+
+            try:
+                self._file.write(msg)
+            except UnicodeEncodeError:
+                # Some environments don't support printing general Unicode
+                # strings, due to misconfiguration or otherwise; in that case,
+                # print the string escaped to ASCII.
+                # When the Unicode situation improves we should consider
+                # letting the error propagate instead of masking it (see #7475
+                # for one brief attempt).
+                msg = msg.encode("unicode-escape").decode("ascii")
+                self._file.write(msg)
+
+            if flush:
+                self.flush()
+
+    def line(self, s: str = "", **markup: bool) -> None:
+        self.write(s, **markup)
+        self.write("\n")
+
+    def flush(self) -> None:
+        self._file.flush()
+
+    def _write_source(self, lines: Sequence[str], indents: Sequence[str] = ()) -> None:
+        """Write lines of source code possibly highlighted.
+
+        Keeping this private for now because the API is clunky. We should discuss how
+        to evolve the terminal writer so we can have more precise color support, for example
+        being able to write part of a line in one color and the rest in another, and so on.
+        """
+        if indents and len(indents) != len(lines):
+            raise ValueError(
+                "indents size ({}) should have same size as lines ({})".format(
+                    len(indents), len(lines)
+                )
+            )
+        if not indents:
+            indents = [""] * len(lines)
+        source = "\n".join(lines)
+        new_lines = self._highlight(source).splitlines()
+        for indent, new_line in zip(indents, new_lines):
+            self.line(indent + new_line)
+
+    def _highlight(self, source: str) -> str:
+        """Highlight the given source code if we have markup support."""
+        from _pytest.config.exceptions import UsageError
+
+        if not self.hasmarkup or not self.code_highlight:
+            return source
+        try:
+            from pygments.formatters.terminal import TerminalFormatter
+            from pygments.lexers.python import PythonLexer
+            from pygments import highlight
+            import pygments.util
+        except ImportError:
+            return source
+        else:
+            try:
+                highlighted: str = highlight(
+                    source,
+                    PythonLexer(),
+                    TerminalFormatter(
+                        bg=os.getenv("PYTEST_THEME_MODE", "dark"),
+                        style=os.getenv("PYTEST_THEME"),
+                    ),
+                )
+                return highlighted
+            except pygments.util.ClassNotFound:
+                raise UsageError(
+                    "PYTEST_THEME environment variable had an invalid value: '{}'. "
+                    "Only valid pygment styles are allowed.".format(
+                        os.getenv("PYTEST_THEME")
+                    )
+                )
+            except pygments.util.OptionError:
+                raise UsageError(
+                    "PYTEST_THEME_MODE environment variable had an invalid value: '{}'. "
+                    "The only allowed values are 'dark' and 'light'.".format(
+                        os.getenv("PYTEST_THEME_MODE")
+                    )
+                )
diff --git a/contrib/python/pytest/py3/_pytest/_io/wcwidth.py b/contrib/python/pytest/py3/_pytest/_io/wcwidth.py
new file mode 100644
index 0000000000..e5c7bf4d86
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/_io/wcwidth.py
@@ -0,0 +1,55 @@
+import unicodedata
+from functools import lru_cache
+
+
+@lru_cache(100)
+def wcwidth(c: str) -> int:
+    """Determine how many columns are needed to display a character in a terminal.
+
+    Returns -1 if the character is not printable.
+    Returns 0, 1 or 2 for other characters.
+    """
+    o = ord(c)
+
+    # ASCII fast path.
+    if 0x20 <= o < 0x07F:
+        return 1
+
+    # Some Cf/Zp/Zl characters which should be zero-width.
+    if (
+        o == 0x0000
+        or 0x200B <= o <= 0x200F
+        or 0x2028 <= o <= 0x202E
+        or 0x2060 <= o <= 0x2063
+    ):
+        return 0
+
+    category = unicodedata.category(c)
+
+    # Control characters.
+    if category == "Cc":
+        return -1
+
+    # Combining characters with zero width.
+    if category in ("Me", "Mn"):
+        return 0
+
+    # Full/Wide east asian characters.
+    if unicodedata.east_asian_width(c) in ("F", "W"):
+        return 2
+
+    return 1
+
+
+def wcswidth(s: str) -> int:
+    """Determine how many columns are needed to display a string in a terminal.
+
+    Returns -1 if the string contains non-printable characters.
+    """
+    width = 0
+    for c in unicodedata.normalize("NFC", s):
+        wc = wcwidth(c)
+        if wc < 0:
+            return -1
+        width += wc
+    return width
diff --git a/contrib/python/pytest/py3/_pytest/_py/__init__.py b/contrib/python/pytest/py3/_pytest/_py/__init__.py
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/_py/__init__.py
diff --git a/contrib/python/pytest/py3/_pytest/_py/error.py b/contrib/python/pytest/py3/_pytest/_py/error.py
new file mode 100644
index 0000000000..0b8f2d535e
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/_py/error.py
@@ -0,0 +1,109 @@
+"""create errno-specific classes for IO or os calls."""
+from __future__ import annotations
+
+import errno
+import os
+import sys
+from typing import Callable
+from typing import TYPE_CHECKING
+from typing import TypeVar
+
+if TYPE_CHECKING:
+    from typing_extensions import ParamSpec
+
+    P = ParamSpec("P")
+
+R = TypeVar("R")
+
+
+class Error(EnvironmentError):
+    def __repr__(self) -> str:
+        return "{}.{} {!r}: {} ".format(
+            self.__class__.__module__,
+            self.__class__.__name__,
+            self.__class__.__doc__,
+            " ".join(map(str, self.args)),
+            # repr(self.args)
+        )
+
+    def __str__(self) -> str:
+        s = "[{}]: {}".format(
+            self.__class__.__doc__,
+            " ".join(map(str, self.args)),
+        )
+        return s
+
+
+_winerrnomap = {
+    2: errno.ENOENT,
+    3: errno.ENOENT,
+    17: errno.EEXIST,
+    18: errno.EXDEV,
+    13: errno.EBUSY,  # empty cd drive, but ENOMEDIUM seems unavailiable
+    22: errno.ENOTDIR,
+    20: errno.ENOTDIR,
+    267: errno.ENOTDIR,
+    5: errno.EACCES,  # anything better?
+}
+
+
+class ErrorMaker:
+    """lazily provides Exception classes for each possible POSIX errno
+    (as defined per the 'errno' module).  All such instances
+    subclass EnvironmentError.
+    """
+
+    _errno2class: dict[int, type[Error]] = {}
+
+    def __getattr__(self, name: str) -> type[Error]:
+        if name[0] == "_":
+            raise AttributeError(name)
+        eno = getattr(errno, name)
+        cls = self._geterrnoclass(eno)
+        setattr(self, name, cls)
+        return cls
+
+    def _geterrnoclass(self, eno: int) -> type[Error]:
+        try:
+            return self._errno2class[eno]
+        except KeyError:
+            clsname = errno.errorcode.get(eno, "UnknownErrno%d" % (eno,))
+            errorcls = type(
+                clsname,
+                (Error,),
+                {"__module__": "py.error", "__doc__": os.strerror(eno)},
+            )
+            self._errno2class[eno] = errorcls
+            return errorcls
+
+    def checked_call(
+        self, func: Callable[P, R], *args: P.args, **kwargs: P.kwargs
+    ) -> R:
+        """Call a function and raise an errno-exception if applicable."""
+        __tracebackhide__ = True
+        try:
+            return func(*args, **kwargs)
+        except Error:
+            raise
+        except OSError as value:
+            if not hasattr(value, "errno"):
+                raise
+            errno = value.errno
+            if sys.platform == "win32":
+                try:
+                    cls = self._geterrnoclass(_winerrnomap[errno])
+                except KeyError:
+                    raise value
+            else:
+                # we are not on Windows, or we got a proper OSError
+                cls = self._geterrnoclass(errno)
+
+            raise cls(f"{func.__name__}{args!r}")
+
+
+_error_maker = ErrorMaker()
+checked_call = _error_maker.checked_call
+
+
+def __getattr__(attr: str) -> type[Error]:
+    return getattr(_error_maker, attr)  # type: ignore[no-any-return]
diff --git a/contrib/python/pytest/py3/_pytest/_py/path.py b/contrib/python/pytest/py3/_pytest/_py/path.py
new file mode 100644
index 0000000000..73a070d19a
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/_py/path.py
@@ -0,0 +1,1475 @@
+"""local path implementation."""
+from __future__ import annotations
+
+import atexit
+import fnmatch
+import importlib.util
+import io
+import os
+import posixpath
+import sys
+import uuid
+import warnings
+from contextlib import contextmanager
+from os.path import abspath
+from os.path import dirname
+from os.path import exists
+from os.path import isabs
+from os.path import isdir
+from os.path import isfile
+from os.path import islink
+from os.path import normpath
+from stat import S_ISDIR
+from stat import S_ISLNK
+from stat import S_ISREG
+from typing import Any
+from typing import Callable
+from typing import cast
+from typing import overload
+from typing import TYPE_CHECKING
+
+from . import error
+
+if TYPE_CHECKING:
+    from typing import Literal
+
+# Moved from local.py.
+iswin32 = sys.platform == "win32" or (getattr(os, "_name", False) == "nt")
+
+
+class Checkers:
+    _depend_on_existence = "exists", "link", "dir", "file"
+
+    def __init__(self, path):
+        self.path = path
+
+    def dotfile(self):
+        return self.path.basename.startswith(".")
+
+    def ext(self, arg):
+        if not arg.startswith("."):
+            arg = "." + arg
+        return self.path.ext == arg
+
+    def basename(self, arg):
+        return self.path.basename == arg
+
+    def basestarts(self, arg):
+        return self.path.basename.startswith(arg)
+
+    def relto(self, arg):
+        return self.path.relto(arg)
+
+    def fnmatch(self, arg):
+        return self.path.fnmatch(arg)
+
+    def endswith(self, arg):
+        return str(self.path).endswith(arg)
+
+    def _evaluate(self, kw):
+        from .._code.source import getrawcode
+
+        for name, value in kw.items():
+            invert = False
+            meth = None
+            try:
+                meth = getattr(self, name)
+            except AttributeError:
+                if name[:3] == "not":
+                    invert = True
+                    try:
+                        meth = getattr(self, name[3:])
+                    except AttributeError:
+                        pass
+            if meth is None:
+                raise TypeError(f"no {name!r} checker available for {self.path!r}")
+            try:
+                if getrawcode(meth).co_argcount > 1:
+                    if (not meth(value)) ^ invert:
+                        return False
+                else:
+                    if bool(value) ^ bool(meth()) ^ invert:
+                        return False
+            except (error.ENOENT, error.ENOTDIR, error.EBUSY):
+                # EBUSY feels not entirely correct,
+                # but its kind of necessary since ENOMEDIUM
+                # is not accessible in python
+                for name in self._depend_on_existence:
+                    if name in kw:
+                        if kw.get(name):
+                            return False
+                    name = "not" + name
+                    if name in kw:
+                        if not kw.get(name):
+                            return False
+        return True
+
+    _statcache: Stat
+
+    def _stat(self) -> Stat:
+        try:
+            return self._statcache
+        except AttributeError:
+            try:
+                self._statcache = self.path.stat()
+            except error.ELOOP:
+                self._statcache = self.path.lstat()
+            return self._statcache
+
+    def dir(self):
+        return S_ISDIR(self._stat().mode)
+
+    def file(self):
+        return S_ISREG(self._stat().mode)
+
+    def exists(self):
+        return self._stat()
+
+    def link(self):
+        st = self.path.lstat()
+        return S_ISLNK(st.mode)
+
+
+class NeverRaised(Exception):
+    pass
+
+
+class Visitor:
+    def __init__(self, fil, rec, ignore, bf, sort):
+        if isinstance(fil, str):
+            fil = FNMatcher(fil)
+        if isinstance(rec, str):
+            self.rec: Callable[[LocalPath], bool] = FNMatcher(rec)
+        elif not hasattr(rec, "__call__") and rec:
+            self.rec = lambda path: True
+        else:
+            self.rec = rec
+        self.fil = fil
+        self.ignore = ignore
+        self.breadthfirst = bf
+        self.optsort = cast(Callable[[Any], Any], sorted) if sort else (lambda x: x)
+
+    def gen(self, path):
+        try:
+            entries = path.listdir()
+        except self.ignore:
+            return
+        rec = self.rec
+        dirs = self.optsort(
+            [p for p in entries if p.check(dir=1) and (rec is None or rec(p))]
+        )
+        if not self.breadthfirst:
+            for subdir in dirs:
+                for p in self.gen(subdir):
+                    yield p
+        for p in self.optsort(entries):
+            if self.fil is None or self.fil(p):
+                yield p
+        if self.breadthfirst:
+            for subdir in dirs:
+                for p in self.gen(subdir):
+                    yield p
+
+
+class FNMatcher:
+    def __init__(self, pattern):
+        self.pattern = pattern
+
+    def __call__(self, path):
+        pattern = self.pattern
+
+        if (
+            pattern.find(path.sep) == -1
+            and iswin32
+            and pattern.find(posixpath.sep) != -1
+        ):
+            # Running on Windows, the pattern has no Windows path separators,
+            # and the pattern has one or more Posix path separators. Replace
+            # the Posix path separators with the Windows path separator.
+            pattern = pattern.replace(posixpath.sep, path.sep)
+
+        if pattern.find(path.sep) == -1:
+            name = path.basename
+        else:
+            name = str(path)  # path.strpath # XXX svn?
+            if not os.path.isabs(pattern):
+                pattern = "*" + path.sep + pattern
+        return fnmatch.fnmatch(name, pattern)
+
+
+def map_as_list(func, iter):
+    return list(map(func, iter))
+
+
+class Stat:
+    if TYPE_CHECKING:
+
+        @property
+        def size(self) -> int:
+            ...
+
+        @property
+        def mtime(self) -> float:
+            ...
+
+    def __getattr__(self, name: str) -> Any:
+        return getattr(self._osstatresult, "st_" + name)
+
+    def __init__(self, path, osstatresult):
+        self.path = path
+        self._osstatresult = osstatresult
+
+    @property
+    def owner(self):
+        if iswin32:
+            raise NotImplementedError("XXX win32")
+        import pwd
+
+        entry = error.checked_call(pwd.getpwuid, self.uid)  # type:ignore[attr-defined]
+        return entry[0]
+
+    @property
+    def group(self):
+        """Return group name of file."""
+        if iswin32:
+            raise NotImplementedError("XXX win32")
+        import grp
+
+        entry = error.checked_call(grp.getgrgid, self.gid)  # type:ignore[attr-defined]
+        return entry[0]
+
+    def isdir(self):
+        return S_ISDIR(self._osstatresult.st_mode)
+
+    def isfile(self):
+        return S_ISREG(self._osstatresult.st_mode)
+
+    def islink(self):
+        self.path.lstat()
+        return S_ISLNK(self._osstatresult.st_mode)
+
+
+def getuserid(user):
+    import pwd
+
+    if not isinstance(user, int):
+        user = pwd.getpwnam(user)[2]  # type:ignore[attr-defined]
+    return user
+
+
+def getgroupid(group):
+    import grp
+
+    if not isinstance(group, int):
+        group = grp.getgrnam(group)[2]  # type:ignore[attr-defined]
+    return group
+
+
+class LocalPath:
+    """Object oriented interface to os.path and other local filesystem
+    related information.
+    """
+
+    class ImportMismatchError(ImportError):
+        """raised on pyimport() if there is a mismatch of __file__'s"""
+
+    sep = os.sep
+
+    def __init__(self, path=None, expanduser=False):
+        """Initialize and return a local Path instance.
+
+        Path can be relative to the current directory.
+        If path is None it defaults to the current working directory.
+        If expanduser is True, tilde-expansion is performed.
+        Note that Path instances always carry an absolute path.
+        Note also that passing in a local path object will simply return
+        the exact same path object. Use new() to get a new copy.
+        """
+        if path is None:
+            self.strpath = error.checked_call(os.getcwd)
+        else:
+            try:
+                path = os.fspath(path)
+            except TypeError:
+                raise ValueError(
+                    "can only pass None, Path instances "
+                    "or non-empty strings to LocalPath"
+                )
+            if expanduser:
+                path = os.path.expanduser(path)
+            self.strpath = abspath(path)
+
+    if sys.platform != "win32":
+
+        def chown(self, user, group, rec=0):
+            """Change ownership to the given user and group.
+            user and group may be specified by a number or
+            by a name.  if rec is True change ownership
+            recursively.
+            """
+            uid = getuserid(user)
+            gid = getgroupid(group)
+            if rec:
+                for x in self.visit(rec=lambda x: x.check(link=0)):
+                    if x.check(link=0):
+                        error.checked_call(os.chown, str(x), uid, gid)
+            error.checked_call(os.chown, str(self), uid, gid)
+
+        def readlink(self) -> str:
+            """Return value of a symbolic link."""
+            # https://github.com/python/mypy/issues/12278
+            return error.checked_call(os.readlink, self.strpath)  # type: ignore[arg-type,return-value]
+
+        def mklinkto(self, oldname):
+            """Posix style hard link to another name."""
+            error.checked_call(os.link, str(oldname), str(self))
+
+        def mksymlinkto(self, value, absolute=1):
+            """Create a symbolic link with the given value (pointing to another name)."""
+            if absolute:
+                error.checked_call(os.symlink, str(value), self.strpath)
+            else:
+                base = self.common(value)
+                # with posix local paths '/' is always a common base
+                relsource = self.__class__(value).relto(base)
+                reldest = self.relto(base)
+                n = reldest.count(self.sep)
+                target = self.sep.join(("..",) * n + (relsource,))
+                error.checked_call(os.symlink, target, self.strpath)
+
+    def __div__(self, other):
+        return self.join(os.fspath(other))
+
+    __truediv__ = __div__  # py3k
+
+    @property
+    def basename(self):
+        """Basename part of path."""
+        return self._getbyspec("basename")[0]
+
+    @property
+    def dirname(self):
+        """Dirname part of path."""
+        return self._getbyspec("dirname")[0]
+
+    @property
+    def purebasename(self):
+        """Pure base name of the path."""
+        return self._getbyspec("purebasename")[0]
+
+    @property
+    def ext(self):
+        """Extension of the path (including the '.')."""
+        return self._getbyspec("ext")[0]
+
+    def read_binary(self):
+        """Read and return a bytestring from reading the path."""
+        with self.open("rb") as f:
+            return f.read()
+
+    def read_text(self, encoding):
+        """Read and return a Unicode string from reading the path."""
+        with self.open("r", encoding=encoding) as f:
+            return f.read()
+
+    def read(self, mode="r"):
+        """Read and return a bytestring from reading the path."""
+        with self.open(mode) as f:
+            return f.read()
+
+    def readlines(self, cr=1):
+        """Read and return a list of lines from the path. if cr is False, the
+        newline will be removed from the end of each line."""
+        mode = "r"
+
+        if not cr:
+            content = self.read(mode)
+            return content.split("\n")
+        else:
+            f = self.open(mode)
+            try:
+                return f.readlines()
+            finally:
+                f.close()
+
+    def load(self):
+        """(deprecated) return object unpickled from self.read()"""
+        f = self.open("rb")
+        try:
+            import pickle
+
+            return error.checked_call(pickle.load, f)
+        finally:
+            f.close()
+
+    def move(self, target):
+        """Move this path to target."""
+        if target.relto(self):
+            raise error.EINVAL(target, "cannot move path into a subdirectory of itself")
+        try:
+            self.rename(target)
+        except error.EXDEV:  # invalid cross-device link
+            self.copy(target)
+            self.remove()
+
+    def fnmatch(self, pattern):
+        """Return true if the basename/fullname matches the glob-'pattern'.
+
+        valid pattern characters::
+
+            *       matches everything
+            ?       matches any single character
+            [seq]   matches any character in seq
+            [!seq]  matches any char not in seq
+
+        If the pattern contains a path-separator then the full path
+        is used for pattern matching and a '*' is prepended to the
+        pattern.
+
+        if the pattern doesn't contain a path-separator the pattern
+        is only matched against the basename.
+        """
+        return FNMatcher(pattern)(self)
+
+    def relto(self, relpath):
+        """Return a string which is the relative part of the path
+        to the given 'relpath'.
+        """
+        if not isinstance(relpath, (str, LocalPath)):
+            raise TypeError(f"{relpath!r}: not a string or path object")
+        strrelpath = str(relpath)
+        if strrelpath and strrelpath[-1] != self.sep:
+            strrelpath += self.sep
+        # assert strrelpath[-1] == self.sep
+        # assert strrelpath[-2] != self.sep
+        strself = self.strpath
+        if sys.platform == "win32" or getattr(os, "_name", None) == "nt":
+            if os.path.normcase(strself).startswith(os.path.normcase(strrelpath)):
+                return strself[len(strrelpath) :]
+        elif strself.startswith(strrelpath):
+            return strself[len(strrelpath) :]
+        return ""
+
+    def ensure_dir(self, *args):
+        """Ensure the path joined with args is a directory."""
+        return self.ensure(*args, **{"dir": True})
+
+    def bestrelpath(self, dest):
+        """Return a string which is a relative path from self
+        (assumed to be a directory) to dest such that
+        self.join(bestrelpath) == dest and if not such
+        path can be determined return dest.
+        """
+        try:
+            if self == dest:
+                return os.curdir
+            base = self.common(dest)
+            if not base:  # can be the case on windows
+                return str(dest)
+            self2base = self.relto(base)
+            reldest = dest.relto(base)
+            if self2base:
+                n = self2base.count(self.sep) + 1
+            else:
+                n = 0
+            lst = [os.pardir] * n
+            if reldest:
+                lst.append(reldest)
+            target = dest.sep.join(lst)
+            return target
+        except AttributeError:
+            return str(dest)
+
+    def exists(self):
+        return self.check()
+
+    def isdir(self):
+        return self.check(dir=1)
+
+    def isfile(self):
+        return self.check(file=1)
+
+    def parts(self, reverse=False):
+        """Return a root-first list of all ancestor directories
+        plus the path itself.
+        """
+        current = self
+        lst = [self]
+        while 1:
+            last = current
+            current = current.dirpath()
+            if last == current:
+                break
+            lst.append(current)
+        if not reverse:
+            lst.reverse()
+        return lst
+
+    def common(self, other):
+        """Return the common part shared with the other path
+        or None if there is no common part.
+        """
+        last = None
+        for x, y in zip(self.parts(), other.parts()):
+            if x != y:
+                return last
+            last = x
+        return last
+
+    def __add__(self, other):
+        """Return new path object with 'other' added to the basename"""
+        return self.new(basename=self.basename + str(other))
+
+    def visit(self, fil=None, rec=None, ignore=NeverRaised, bf=False, sort=False):
+        """Yields all paths below the current one
+
+        fil is a filter (glob pattern or callable), if not matching the
+        path will not be yielded, defaulting to None (everything is
+        returned)
+
+        rec is a filter (glob pattern or callable) that controls whether
+        a node is descended, defaulting to None
+
+        ignore is an Exception class that is ignoredwhen calling dirlist()
+        on any of the paths (by default, all exceptions are reported)
+
+        bf if True will cause a breadthfirst search instead of the
+        default depthfirst. Default: False
+
+        sort if True will sort entries within each directory level.
+        """
+        yield from Visitor(fil, rec, ignore, bf, sort).gen(self)
+
+    def _sortlist(self, res, sort):
+        if sort:
+            if hasattr(sort, "__call__"):
+                warnings.warn(
+                    DeprecationWarning(
+                        "listdir(sort=callable) is deprecated and breaks on python3"
+                    ),
+                    stacklevel=3,
+                )
+                res.sort(sort)
+            else:
+                res.sort()
+
+    def __fspath__(self):
+        return self.strpath
+
+    def __hash__(self):
+        s = self.strpath
+        if iswin32:
+            s = s.lower()
+        return hash(s)
+
+    def __eq__(self, other):
+        s1 = os.fspath(self)
+        try:
+            s2 = os.fspath(other)
+        except TypeError:
+            return False
+        if iswin32:
+            s1 = s1.lower()
+            try:
+                s2 = s2.lower()
+            except AttributeError:
+                return False
+        return s1 == s2
+
+    def __ne__(self, other):
+        return not (self == other)
+
+    def __lt__(self, other):
+        return os.fspath(self) < os.fspath(other)
+
+    def __gt__(self, other):
+        return os.fspath(self) > os.fspath(other)
+
+    def samefile(self, other):
+        """Return True if 'other' references the same file as 'self'."""
+        other = os.fspath(other)
+        if not isabs(other):
+            other = abspath(other)
+        if self == other:
+            return True
+        if not hasattr(os.path, "samefile"):
+            return False
+        return error.checked_call(os.path.samefile, self.strpath, other)
+
+    def remove(self, rec=1, ignore_errors=False):
+        """Remove a file or directory (or a directory tree if rec=1).
+        if ignore_errors is True, errors while removing directories will
+        be ignored.
+        """
+        if self.check(dir=1, link=0):
+            if rec:
+                # force remove of readonly files on windows
+                if iswin32:
+                    self.chmod(0o700, rec=1)
+                import shutil
+
+                error.checked_call(
+                    shutil.rmtree, self.strpath, ignore_errors=ignore_errors
+                )
+            else:
+                error.checked_call(os.rmdir, self.strpath)
+        else:
+            if iswin32:
+                self.chmod(0o700)
+            error.checked_call(os.remove, self.strpath)
+
+    def computehash(self, hashtype="md5", chunksize=524288):
+        """Return hexdigest of hashvalue for this file."""
+        try:
+            try:
+                import hashlib as mod
+            except ImportError:
+                if hashtype == "sha1":
+                    hashtype = "sha"
+                mod = __import__(hashtype)
+            hash = getattr(mod, hashtype)()
+        except (AttributeError, ImportError):
+            raise ValueError(f"Don't know how to compute {hashtype!r} hash")
+        f = self.open("rb")
+        try:
+            while 1:
+                buf = f.read(chunksize)
+                if not buf:
+                    return hash.hexdigest()
+                hash.update(buf)
+        finally:
+            f.close()
+
+    def new(self, **kw):
+        """Create a modified version of this path.
+        the following keyword arguments modify various path parts::
+
+          a:/some/path/to/a/file.ext
+          xx                           drive
+          xxxxxxxxxxxxxxxxx            dirname
+                            xxxxxxxx   basename
+                            xxxx       purebasename
+                                 xxx   ext
+        """
+        obj = object.__new__(self.__class__)
+        if not kw:
+            obj.strpath = self.strpath
+            return obj
+        drive, dirname, basename, purebasename, ext = self._getbyspec(
+            "drive,dirname,basename,purebasename,ext"
+        )
+        if "basename" in kw:
+            if "purebasename" in kw or "ext" in kw:
+                raise ValueError("invalid specification %r" % kw)
+        else:
+            pb = kw.setdefault("purebasename", purebasename)
+            try:
+                ext = kw["ext"]
+            except KeyError:
+                pass
+            else:
+                if ext and not ext.startswith("."):
+                    ext = "." + ext
+            kw["basename"] = pb + ext
+
+        if "dirname" in kw and not kw["dirname"]:
+            kw["dirname"] = drive
+        else:
+            kw.setdefault("dirname", dirname)
+        kw.setdefault("sep", self.sep)
+        obj.strpath = normpath("%(dirname)s%(sep)s%(basename)s" % kw)
+        return obj
+
+    def _getbyspec(self, spec: str) -> list[str]:
+        """See new for what 'spec' can be."""
+        res = []
+        parts = self.strpath.split(self.sep)
+
+        args = filter(None, spec.split(","))
+        for name in args:
+            if name == "drive":
+                res.append(parts[0])
+            elif name == "dirname":
+                res.append(self.sep.join(parts[:-1]))
+            else:
+                basename = parts[-1]
+                if name == "basename":
+                    res.append(basename)
+                else:
+                    i = basename.rfind(".")
+                    if i == -1:
+                        purebasename, ext = basename, ""
+                    else:
+                        purebasename, ext = basename[:i], basename[i:]
+                    if name == "purebasename":
+                        res.append(purebasename)
+                    elif name == "ext":
+                        res.append(ext)
+                    else:
+                        raise ValueError("invalid part specification %r" % name)
+        return res
+
+    def dirpath(self, *args, **kwargs):
+        """Return the directory path joined with any given path arguments."""
+        if not kwargs:
+            path = object.__new__(self.__class__)
+            path.strpath = dirname(self.strpath)
+            if args:
+                path = path.join(*args)
+            return path
+        return self.new(basename="").join(*args, **kwargs)
+
+    def join(self, *args: os.PathLike[str], abs: bool = False) -> LocalPath:
+        """Return a new path by appending all 'args' as path
+        components.  if abs=1 is used restart from root if any
+        of the args is an absolute path.
+        """
+        sep = self.sep
+        strargs = [os.fspath(arg) for arg in args]
+        strpath = self.strpath
+        if abs:
+            newargs: list[str] = []
+            for arg in reversed(strargs):
+                if isabs(arg):
+                    strpath = arg
+                    strargs = newargs
+                    break
+                newargs.insert(0, arg)
+        # special case for when we have e.g. strpath == "/"
+        actual_sep = "" if strpath.endswith(sep) else sep
+        for arg in strargs:
+            arg = arg.strip(sep)
+            if iswin32:
+                # allow unix style paths even on windows.
+                arg = arg.strip("/")
+                arg = arg.replace("/", sep)
+            strpath = strpath + actual_sep + arg
+            actual_sep = sep
+        obj = object.__new__(self.__class__)
+        obj.strpath = normpath(strpath)
+        return obj
+
+    def open(self, mode="r", ensure=False, encoding=None):
+        """Return an opened file with the given mode.
+
+        If ensure is True, create parent directories if needed.
+        """
+        if ensure:
+            self.dirpath().ensure(dir=1)
+        if encoding:
+            return error.checked_call(io.open, self.strpath, mode, encoding=encoding)
+        return error.checked_call(open, self.strpath, mode)
+
+    def _fastjoin(self, name):
+        child = object.__new__(self.__class__)
+        child.strpath = self.strpath + self.sep + name
+        return child
+
+    def islink(self):
+        return islink(self.strpath)
+
+    def check(self, **kw):
+        """Check a path for existence and properties.
+
+        Without arguments, return True if the path exists, otherwise False.
+
+        valid checkers::
+
+            file=1    # is a file
+            file=0    # is not a file (may not even exist)
+            dir=1     # is a dir
+            link=1    # is a link
+            exists=1  # exists
+
+        You can specify multiple checker definitions, for example::
+
+            path.check(file=1, link=1)  # a link pointing to a file
+        """
+        if not kw:
+            return exists(self.strpath)
+        if len(kw) == 1:
+            if "dir" in kw:
+                return not kw["dir"] ^ isdir(self.strpath)
+            if "file" in kw:
+                return not kw["file"] ^ isfile(self.strpath)
+        if not kw:
+            kw = {"exists": 1}
+        return Checkers(self)._evaluate(kw)
+
+    _patternchars = set("*?[" + os.sep)
+
+    def listdir(self, fil=None, sort=None):
+        """List directory contents, possibly filter by the given fil func
+        and possibly sorted.
+        """
+        if fil is None and sort is None:
+            names = error.checked_call(os.listdir, self.strpath)
+            return map_as_list(self._fastjoin, names)
+        if isinstance(fil, str):
+            if not self._patternchars.intersection(fil):
+                child = self._fastjoin(fil)
+                if exists(child.strpath):
+                    return [child]
+                return []
+            fil = FNMatcher(fil)
+        names = error.checked_call(os.listdir, self.strpath)
+        res = []
+        for name in names:
+            child = self._fastjoin(name)
+            if fil is None or fil(child):
+                res.append(child)
+        self._sortlist(res, sort)
+        return res
+
+    def size(self) -> int:
+        """Return size of the underlying file object"""
+        return self.stat().size
+
+    def mtime(self) -> float:
+        """Return last modification time of the path."""
+        return self.stat().mtime
+
+    def copy(self, target, mode=False, stat=False):
+        """Copy path to target.
+
+        If mode is True, will copy copy permission from path to target.
+        If stat is True, copy permission, last modification
+        time, last access time, and flags from path to target.
+        """
+        if self.check(file=1):
+            if target.check(dir=1):
+                target = target.join(self.basename)
+            assert self != target
+            copychunked(self, target)
+            if mode:
+                copymode(self.strpath, target.strpath)
+            if stat:
+                copystat(self, target)
+        else:
+
+            def rec(p):
+                return p.check(link=0)
+
+            for x in self.visit(rec=rec):
+                relpath = x.relto(self)
+                newx = target.join(relpath)
+                newx.dirpath().ensure(dir=1)
+                if x.check(link=1):
+                    newx.mksymlinkto(x.readlink())
+                    continue
+                elif x.check(file=1):
+                    copychunked(x, newx)
+                elif x.check(dir=1):
+                    newx.ensure(dir=1)
+                if mode:
+                    copymode(x.strpath, newx.strpath)
+                if stat:
+                    copystat(x, newx)
+
+    def rename(self, target):
+        """Rename this path to target."""
+        target = os.fspath(target)
+        return error.checked_call(os.rename, self.strpath, target)
+
+    def dump(self, obj, bin=1):
+        """Pickle object into path location"""
+        f = self.open("wb")
+        import pickle
+
+        try:
+            error.checked_call(pickle.dump, obj, f, bin)
+        finally:
+            f.close()
+
+    def mkdir(self, *args):
+        """Create & return the directory joined with args."""
+        p = self.join(*args)
+        error.checked_call(os.mkdir, os.fspath(p))
+        return p
+
+    def write_binary(self, data, ensure=False):
+        """Write binary data into path.   If ensure is True create
+        missing parent directories.
+        """
+        if ensure:
+            self.dirpath().ensure(dir=1)
+        with self.open("wb") as f:
+            f.write(data)
+
+    def write_text(self, data, encoding, ensure=False):
+        """Write text data into path using the specified encoding.
+        If ensure is True create missing parent directories.
+        """
+        if ensure:
+            self.dirpath().ensure(dir=1)
+        with self.open("w", encoding=encoding) as f:
+            f.write(data)
+
+    def write(self, data, mode="w", ensure=False):
+        """Write data into path.   If ensure is True create
+        missing parent directories.
+        """
+        if ensure:
+            self.dirpath().ensure(dir=1)
+        if "b" in mode:
+            if not isinstance(data, bytes):
+                raise ValueError("can only process bytes")
+        else:
+            if not isinstance(data, str):
+                if not isinstance(data, bytes):
+                    data = str(data)
+                else:
+                    data = data.decode(sys.getdefaultencoding())
+        f = self.open(mode)
+        try:
+            f.write(data)
+        finally:
+            f.close()
+
+    def _ensuredirs(self):
+        parent = self.dirpath()
+        if parent == self:
+            return self
+        if parent.check(dir=0):
+            parent._ensuredirs()
+        if self.check(dir=0):
+            try:
+                self.mkdir()
+            except error.EEXIST:
+                # race condition: file/dir created by another thread/process.
+                # complain if it is not a dir
+                if self.check(dir=0):
+                    raise
+        return self
+
+    def ensure(self, *args, **kwargs):
+        """Ensure that an args-joined path exists (by default as
+        a file). if you specify a keyword argument 'dir=True'
+        then the path is forced to be a directory path.
+        """
+        p = self.join(*args)
+        if kwargs.get("dir", 0):
+            return p._ensuredirs()
+        else:
+            p.dirpath()._ensuredirs()
+            if not p.check(file=1):
+                p.open("wb").close()
+            return p
+
+    @overload
+    def stat(self, raising: Literal[True] = ...) -> Stat:
+        ...
+
+    @overload
+    def stat(self, raising: Literal[False]) -> Stat | None:
+        ...
+
+    def stat(self, raising: bool = True) -> Stat | None:
+        """Return an os.stat() tuple."""
+        if raising:
+            return Stat(self, error.checked_call(os.stat, self.strpath))
+        try:
+            return Stat(self, os.stat(self.strpath))
+        except KeyboardInterrupt:
+            raise
+        except Exception:
+            return None
+
+    def lstat(self) -> Stat:
+        """Return an os.lstat() tuple."""
+        return Stat(self, error.checked_call(os.lstat, self.strpath))
+
+    def setmtime(self, mtime=None):
+        """Set modification time for the given path.  if 'mtime' is None
+        (the default) then the file's mtime is set to current time.
+
+        Note that the resolution for 'mtime' is platform dependent.
+        """
+        if mtime is None:
+            return error.checked_call(os.utime, self.strpath, mtime)
+        try:
+            return error.checked_call(os.utime, self.strpath, (-1, mtime))
+        except error.EINVAL:
+            return error.checked_call(os.utime, self.strpath, (self.atime(), mtime))
+
+    def chdir(self):
+        """Change directory to self and return old current directory"""
+        try:
+            old = self.__class__()
+        except error.ENOENT:
+            old = None
+        error.checked_call(os.chdir, self.strpath)
+        return old
+
+    @contextmanager
+    def as_cwd(self):
+        """
+        Return a context manager, which changes to the path's dir during the
+        managed "with" context.
+        On __enter__ it returns the old dir, which might be ``None``.
+        """
+        old = self.chdir()
+        try:
+            yield old
+        finally:
+            if old is not None:
+                old.chdir()
+
+    def realpath(self):
+        """Return a new path which contains no symbolic links."""
+        return self.__class__(os.path.realpath(self.strpath))
+
+    def atime(self):
+        """Return last access time of the path."""
+        return self.stat().atime
+
+    def __repr__(self):
+        return "local(%r)" % self.strpath
+
+    def __str__(self):
+        """Return string representation of the Path."""
+        return self.strpath
+
+    def chmod(self, mode, rec=0):
+        """Change permissions to the given mode. If mode is an
+        integer it directly encodes the os-specific modes.
+        if rec is True perform recursively.
+        """
+        if not isinstance(mode, int):
+            raise TypeError(f"mode {mode!r} must be an integer")
+        if rec:
+            for x in self.visit(rec=rec):
+                error.checked_call(os.chmod, str(x), mode)
+        error.checked_call(os.chmod, self.strpath, mode)
+
+    def pypkgpath(self):
+        """Return the Python package path by looking for the last
+        directory upwards which still contains an __init__.py.
+        Return None if a pkgpath can not be determined.
+        """
+        pkgpath = None
+        for parent in self.parts(reverse=True):
+            if parent.isdir():
+                if not parent.join("__init__.py").exists():
+                    break
+                if not isimportable(parent.basename):
+                    break
+                pkgpath = parent
+        return pkgpath
+
+    def _ensuresyspath(self, ensuremode, path):
+        if ensuremode:
+            s = str(path)
+            if ensuremode == "append":
+                if s not in sys.path:
+                    sys.path.append(s)
+            else:
+                if s != sys.path[0]:
+                    sys.path.insert(0, s)
+
+    def pyimport(self, modname=None, ensuresyspath=True):
+        """Return path as an imported python module.
+
+        If modname is None, look for the containing package
+        and construct an according module name.
+        The module will be put/looked up in sys.modules.
+        if ensuresyspath is True then the root dir for importing
+        the file (taking __init__.py files into account) will
+        be prepended to sys.path if it isn't there already.
+        If ensuresyspath=="append" the root dir will be appended
+        if it isn't already contained in sys.path.
+        if ensuresyspath is False no modification of syspath happens.
+
+        Special value of ensuresyspath=="importlib" is intended
+        purely for using in pytest, it is capable only of importing
+        separate .py files outside packages, e.g. for test suite
+        without any __init__.py file. It effectively allows having
+        same-named test modules in different places and offers
+        mild opt-in via this option. Note that it works only in
+        recent versions of python.
+        """
+        if not self.check():
+            raise error.ENOENT(self)
+
+        if ensuresyspath == "importlib":
+            if modname is None:
+                modname = self.purebasename
+            spec = importlib.util.spec_from_file_location(modname, str(self))
+            if spec is None or spec.loader is None:
+                raise ImportError(
+                    f"Can't find module {modname} at location {str(self)}"
+                )
+            mod = importlib.util.module_from_spec(spec)
+            spec.loader.exec_module(mod)
+            return mod
+
+        pkgpath = None
+        if modname is None:
+            pkgpath = self.pypkgpath()
+            if pkgpath is not None:
+                pkgroot = pkgpath.dirpath()
+                names = self.new(ext="").relto(pkgroot).split(self.sep)
+                if names[-1] == "__init__":
+                    names.pop()
+                modname = ".".join(names)
+            else:
+                pkgroot = self.dirpath()
+                modname = self.purebasename
+
+            self._ensuresyspath(ensuresyspath, pkgroot)
+            __import__(modname)
+            mod = sys.modules[modname]
+            if self.basename == "__init__.py":
+                return mod  # we don't check anything as we might
+                # be in a namespace package ... too icky to check
+            modfile = mod.__file__
+            assert modfile is not None
+            if modfile[-4:] in (".pyc", ".pyo"):
+                modfile = modfile[:-1]
+            elif modfile.endswith("$py.class"):
+                modfile = modfile[:-9] + ".py"
+            if modfile.endswith(os.sep + "__init__.py"):
+                if self.basename != "__init__.py":
+                    modfile = modfile[:-12]
+            try:
+                issame = self.samefile(modfile)
+            except error.ENOENT:
+                issame = False
+            if not issame:
+                ignore = os.getenv("PY_IGNORE_IMPORTMISMATCH")
+                if ignore != "1":
+                    raise self.ImportMismatchError(modname, modfile, self)
+            return mod
+        else:
+            try:
+                return sys.modules[modname]
+            except KeyError:
+                # we have a custom modname, do a pseudo-import
+                import types
+
+                mod = types.ModuleType(modname)
+                mod.__file__ = str(self)
+                sys.modules[modname] = mod
+                try:
+                    with open(str(self), "rb") as f:
+                        exec(f.read(), mod.__dict__)
+                except BaseException:
+                    del sys.modules[modname]
+                    raise
+                return mod
+
+    def sysexec(self, *argv: os.PathLike[str], **popen_opts: Any) -> str:
+        """Return stdout text from executing a system child process,
+        where the 'self' path points to executable.
+        The process is directly invoked and not through a system shell.
+        """
+        from subprocess import Popen, PIPE
+
+        popen_opts.pop("stdout", None)
+        popen_opts.pop("stderr", None)
+        proc = Popen(
+            [str(self)] + [str(arg) for arg in argv],
+            **popen_opts,
+            stdout=PIPE,
+            stderr=PIPE,
+        )
+        stdout: str | bytes
+        stdout, stderr = proc.communicate()
+        ret = proc.wait()
+        if isinstance(stdout, bytes):
+            stdout = stdout.decode(sys.getdefaultencoding())
+        if ret != 0:
+            if isinstance(stderr, bytes):
+                stderr = stderr.decode(sys.getdefaultencoding())
+            raise RuntimeError(
+                ret,
+                ret,
+                str(self),
+                stdout,
+                stderr,
+            )
+        return stdout
+
+    @classmethod
+    def sysfind(cls, name, checker=None, paths=None):
+        """Return a path object found by looking at the systems
+        underlying PATH specification. If the checker is not None
+        it will be invoked to filter matching paths.  If a binary
+        cannot be found, None is returned
+        Note: This is probably not working on plain win32 systems
+        but may work on cygwin.
+        """
+        if isabs(name):
+            p = local(name)
+            if p.check(file=1):
+                return p
+        else:
+            if paths is None:
+                if iswin32:
+                    paths = os.environ["Path"].split(";")
+                    if "" not in paths and "." not in paths:
+                        paths.append(".")
+                    try:
+                        systemroot = os.environ["SYSTEMROOT"]
+                    except KeyError:
+                        pass
+                    else:
+                        paths = [
+                            path.replace("%SystemRoot%", systemroot) for path in paths
+                        ]
+                else:
+                    paths = os.environ["PATH"].split(":")
+            tryadd = []
+            if iswin32:
+                tryadd += os.environ["PATHEXT"].split(os.pathsep)
+            tryadd.append("")
+
+            for x in paths:
+                for addext in tryadd:
+                    p = local(x).join(name, abs=True) + addext
+                    try:
+                        if p.check(file=1):
+                            if checker:
+                                if not checker(p):
+                                    continue
+                            return p
+                    except error.EACCES:
+                        pass
+        return None
+
+    @classmethod
+    def _gethomedir(cls):
+        try:
+            x = os.environ["HOME"]
+        except KeyError:
+            try:
+                x = os.environ["HOMEDRIVE"] + os.environ["HOMEPATH"]
+            except KeyError:
+                return None
+        return cls(x)
+
+    # """
+    # special class constructors for local filesystem paths
+    # """
+    @classmethod
+    def get_temproot(cls):
+        """Return the system's temporary directory
+        (where tempfiles are usually created in)
+        """
+        import tempfile
+
+        return local(tempfile.gettempdir())
+
+    @classmethod
+    def mkdtemp(cls, rootdir=None):
+        """Return a Path object pointing to a fresh new temporary directory
+        (which we created ourself).
+        """
+        import tempfile
+
+        if rootdir is None:
+            rootdir = cls.get_temproot()
+        return cls(error.checked_call(tempfile.mkdtemp, dir=str(rootdir)))
+
+    @classmethod
+    def make_numbered_dir(
+        cls, prefix="session-", rootdir=None, keep=3, lock_timeout=172800
+    ):  # two days
+        """Return unique directory with a number greater than the current
+        maximum one.  The number is assumed to start directly after prefix.
+        if keep is true directories with a number less than (maxnum-keep)
+        will be removed. If .lock files are used (lock_timeout non-zero),
+        algorithm is multi-process safe.
+        """
+        if rootdir is None:
+            rootdir = cls.get_temproot()
+
+        nprefix = prefix.lower()
+
+        def parse_num(path):
+            """Parse the number out of a path (if it matches the prefix)"""
+            nbasename = path.basename.lower()
+            if nbasename.startswith(nprefix):
+                try:
+                    return int(nbasename[len(nprefix) :])
+                except ValueError:
+                    pass
+
+        def create_lockfile(path):
+            """Exclusively create lockfile. Throws when failed"""
+            mypid = os.getpid()
+            lockfile = path.join(".lock")
+            if hasattr(lockfile, "mksymlinkto"):
+                lockfile.mksymlinkto(str(mypid))
+            else:
+                fd = error.checked_call(
+                    os.open, str(lockfile), os.O_WRONLY | os.O_CREAT | os.O_EXCL, 0o644
+                )
+                with os.fdopen(fd, "w") as f:
+                    f.write(str(mypid))
+            return lockfile
+
+        def atexit_remove_lockfile(lockfile):
+            """Ensure lockfile is removed at process exit"""
+            mypid = os.getpid()
+
+            def try_remove_lockfile():
+                # in a fork() situation, only the last process should
+                # remove the .lock, otherwise the other processes run the
+                # risk of seeing their temporary dir disappear.  For now
+                # we remove the .lock in the parent only (i.e. we assume
+                # that the children finish before the parent).
+                if os.getpid() != mypid:
+                    return
+                try:
+                    lockfile.remove()
+                except error.Error:
+                    pass
+
+            atexit.register(try_remove_lockfile)
+
+        # compute the maximum number currently in use with the prefix
+        lastmax = None
+        while True:
+            maxnum = -1
+            for path in rootdir.listdir():
+                num = parse_num(path)
+                if num is not None:
+                    maxnum = max(maxnum, num)
+
+            # make the new directory
+            try:
+                udir = rootdir.mkdir(prefix + str(maxnum + 1))
+                if lock_timeout:
+                    lockfile = create_lockfile(udir)
+                    atexit_remove_lockfile(lockfile)
+            except (error.EEXIST, error.ENOENT, error.EBUSY):
+                # race condition (1): another thread/process created the dir
+                #                     in the meantime - try again
+                # race condition (2): another thread/process spuriously acquired
+                #                     lock treating empty directory as candidate
+                #                     for removal - try again
+                # race condition (3): another thread/process tried to create the lock at
+                #                     the same time (happened in Python 3.3 on Windows)
+                # https://ci.appveyor.com/project/pytestbot/py/build/1.0.21/job/ffi85j4c0lqwsfwa
+                if lastmax == maxnum:
+                    raise
+                lastmax = maxnum
+                continue
+            break
+
+        def get_mtime(path):
+            """Read file modification time"""
+            try:
+                return path.lstat().mtime
+            except error.Error:
+                pass
+
+        garbage_prefix = prefix + "garbage-"
+
+        def is_garbage(path):
+            """Check if path denotes directory scheduled for removal"""
+            bn = path.basename
+            return bn.startswith(garbage_prefix)
+
+        # prune old directories
+        udir_time = get_mtime(udir)
+        if keep and udir_time:
+            for path in rootdir.listdir():
+                num = parse_num(path)
+                if num is not None and num <= (maxnum - keep):
+                    try:
+                        # try acquiring lock to remove directory as exclusive user
+                        if lock_timeout:
+                            create_lockfile(path)
+                    except (error.EEXIST, error.ENOENT, error.EBUSY):
+                        path_time = get_mtime(path)
+                        if not path_time:
+                            # assume directory doesn't exist now
+                            continue
+                        if abs(udir_time - path_time) < lock_timeout:
+                            # assume directory with lockfile exists
+                            # and lock timeout hasn't expired yet
+                            continue
+
+                    # path dir locked for exclusive use
+                    # and scheduled for removal to avoid another thread/process
+                    # treating it as a new directory or removal candidate
+                    garbage_path = rootdir.join(garbage_prefix + str(uuid.uuid4()))
+                    try:
+                        path.rename(garbage_path)
+                        garbage_path.remove(rec=1)
+                    except KeyboardInterrupt:
+                        raise
+                    except Exception:  # this might be error.Error, WindowsError ...
+                        pass
+                if is_garbage(path):
+                    try:
+                        path.remove(rec=1)
+                    except KeyboardInterrupt:
+                        raise
+                    except Exception:  # this might be error.Error, WindowsError ...
+                        pass
+
+        # make link...
+        try:
+            username = os.environ["USER"]  # linux, et al
+        except KeyError:
+            try:
+                username = os.environ["USERNAME"]  # windows
+            except KeyError:
+                username = "current"
+
+        src = str(udir)
+        dest = src[: src.rfind("-")] + "-" + username
+        try:
+            os.unlink(dest)
+        except OSError:
+            pass
+        try:
+            os.symlink(src, dest)
+        except (OSError, AttributeError, NotImplementedError):
+            pass
+
+        return udir
+
+
+def copymode(src, dest):
+    """Copy permission from src to dst."""
+    import shutil
+
+    shutil.copymode(src, dest)
+
+
+def copystat(src, dest):
+    """Copy permission,  last modification time,
+    last access time, and flags from src to dst."""
+    import shutil
+
+    shutil.copystat(str(src), str(dest))
+
+
+def copychunked(src, dest):
+    chunksize = 524288  # half a meg of bytes
+    fsrc = src.open("rb")
+    try:
+        fdest = dest.open("wb")
+        try:
+            while 1:
+                buf = fsrc.read(chunksize)
+                if not buf:
+                    break
+                fdest.write(buf)
+        finally:
+            fdest.close()
+    finally:
+        fsrc.close()
+
+
+def isimportable(name):
+    if name and (name[0].isalpha() or name[0] == "_"):
+        name = name.replace("_", "")
+        return not name or name.isalnum()
+
+
+local = LocalPath
diff --git a/contrib/python/pytest/py3/_pytest/_version.py b/contrib/python/pytest/py3/_pytest/_version.py
new file mode 100644
index 0000000000..a7f556f8a6
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/_version.py
@@ -0,0 +1,4 @@
+# file generated by setuptools_scm
+# don't change, don't track in version control
+__version__ = version = '7.4.2'
+__version_tuple__ = version_tuple = (7, 4, 2)
diff --git a/contrib/python/pytest/py3/_pytest/assertion/__init__.py b/contrib/python/pytest/py3/_pytest/assertion/__init__.py
new file mode 100644
index 0000000000..a46e58136b
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/assertion/__init__.py
@@ -0,0 +1,181 @@
+"""Support for presenting detailed information in failing assertions."""
+import sys
+from typing import Any
+from typing import Generator
+from typing import List
+from typing import Optional
+from typing import TYPE_CHECKING
+
+from _pytest.assertion import rewrite
+from _pytest.assertion import truncate
+from _pytest.assertion import util
+from _pytest.assertion.rewrite import assertstate_key
+from _pytest.config import Config
+from _pytest.config import hookimpl
+from _pytest.config.argparsing import Parser
+from _pytest.nodes import Item
+
+if TYPE_CHECKING:
+    from _pytest.main import Session
+
+
+def pytest_addoption(parser: Parser) -> None:
+    group = parser.getgroup("debugconfig")
+    group.addoption(
+        "--assert",
+        action="store",
+        dest="assertmode",
+        choices=("rewrite", "plain"),
+        default="rewrite",
+        metavar="MODE",
+        help=(
+            "Control assertion debugging tools.\n"
+            "'plain' performs no assertion debugging.\n"
+            "'rewrite' (the default) rewrites assert statements in test modules"
+            " on import to provide assert expression information."
+        ),
+    )
+    parser.addini(
+        "enable_assertion_pass_hook",
+        type="bool",
+        default=False,
+        help="Enables the pytest_assertion_pass hook. "
+        "Make sure to delete any previously generated pyc cache files.",
+    )
+
+
+def register_assert_rewrite(*names: str) -> None:
+    """Register one or more module names to be rewritten on import.
+
+    This function will make sure that this module or all modules inside
+    the package will get their assert statements rewritten.
+    Thus you should make sure to call this before the module is
+    actually imported, usually in your __init__.py if you are a plugin
+    using a package.
+
+    :param names: The module names to register.
+    """
+    for name in names:
+        if not isinstance(name, str):
+            msg = "expected module names as *args, got {0} instead"  # type: ignore[unreachable]
+            raise TypeError(msg.format(repr(names)))
+    for hook in sys.meta_path:
+        if isinstance(hook, rewrite.AssertionRewritingHook):
+            importhook = hook
+            break
+    else:
+        # TODO(typing): Add a protocol for mark_rewrite() and use it
+        # for importhook and for PytestPluginManager.rewrite_hook.
+        importhook = DummyRewriteHook()  # type: ignore
+    importhook.mark_rewrite(*names)
+
+
+class DummyRewriteHook:
+    """A no-op import hook for when rewriting is disabled."""
+
+    def mark_rewrite(self, *names: str) -> None:
+        pass
+
+
+class AssertionState:
+    """State for the assertion plugin."""
+
+    def __init__(self, config: Config, mode) -> None:
+        self.mode = mode
+        self.trace = config.trace.root.get("assertion")
+        self.hook: Optional[rewrite.AssertionRewritingHook] = None
+
+
+def install_importhook(config: Config) -> rewrite.AssertionRewritingHook:
+    """Try to install the rewrite hook, raise SystemError if it fails."""
+    config.stash[assertstate_key] = AssertionState(config, "rewrite")
+    config.stash[assertstate_key].hook = hook = rewrite.AssertionRewritingHook(config)
+    sys.meta_path.insert(0, hook)
+    config.stash[assertstate_key].trace("installed rewrite import hook")
+
+    def undo() -> None:
+        hook = config.stash[assertstate_key].hook
+        if hook is not None and hook in sys.meta_path:
+            sys.meta_path.remove(hook)
+
+    config.add_cleanup(undo)
+    return hook
+
+
+def pytest_collection(session: "Session") -> None:
+    # This hook is only called when test modules are collected
+    # so for example not in the managing process of pytest-xdist
+    # (which does not collect test modules).
+    assertstate = session.config.stash.get(assertstate_key, None)
+    if assertstate:
+        if assertstate.hook is not None:
+            assertstate.hook.set_session(session)
+
+
+@hookimpl(tryfirst=True, hookwrapper=True)
+def pytest_runtest_protocol(item: Item) -> Generator[None, None, None]:
+    """Setup the pytest_assertrepr_compare and pytest_assertion_pass hooks.
+
+    The rewrite module will use util._reprcompare if it exists to use custom
+    reporting via the pytest_assertrepr_compare hook.  This sets up this custom
+    comparison for the test.
+    """
+
+    ihook = item.ihook
+
+    def callbinrepr(op, left: object, right: object) -> Optional[str]:
+        """Call the pytest_assertrepr_compare hook and prepare the result.
+
+        This uses the first result from the hook and then ensures the
+        following:
+        * Overly verbose explanations are truncated unless configured otherwise
+          (eg. if running in verbose mode).
+        * Embedded newlines are escaped to help util.format_explanation()
+          later.
+        * If the rewrite mode is used embedded %-characters are replaced
+          to protect later % formatting.
+
+        The result can be formatted by util.format_explanation() for
+        pretty printing.
+        """
+        hook_result = ihook.pytest_assertrepr_compare(
+            config=item.config, op=op, left=left, right=right
+        )
+        for new_expl in hook_result:
+            if new_expl:
+                new_expl = truncate.truncate_if_required(new_expl, item)
+                new_expl = [line.replace("\n", "\\n") for line in new_expl]
+                res = "\n~".join(new_expl)
+                if item.config.getvalue("assertmode") == "rewrite":
+                    res = res.replace("%", "%%")
+                return res
+        return None
+
+    saved_assert_hooks = util._reprcompare, util._assertion_pass
+    util._reprcompare = callbinrepr
+    util._config = item.config
+
+    if ihook.pytest_assertion_pass.get_hookimpls():
+
+        def call_assertion_pass_hook(lineno: int, orig: str, expl: str) -> None:
+            ihook.pytest_assertion_pass(item=item, lineno=lineno, orig=orig, expl=expl)
+
+        util._assertion_pass = call_assertion_pass_hook
+
+    yield
+
+    util._reprcompare, util._assertion_pass = saved_assert_hooks
+    util._config = None
+
+
+def pytest_sessionfinish(session: "Session") -> None:
+    assertstate = session.config.stash.get(assertstate_key, None)
+    if assertstate:
+        if assertstate.hook is not None:
+            assertstate.hook.set_session(None)
+
+
+def pytest_assertrepr_compare(
+    config: Config, op: str, left: Any, right: Any
+) -> Optional[List[str]]:
+    return util.assertrepr_compare(config=config, op=op, left=left, right=right)
diff --git a/contrib/python/pytest/py3/_pytest/assertion/rewrite.py b/contrib/python/pytest/py3/_pytest/assertion/rewrite.py
new file mode 100644
index 0000000000..ab83fee32b
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/assertion/rewrite.py
@@ -0,0 +1,1185 @@
+"""Rewrite assertion AST to produce nice error messages."""
+import ast
+import errno
+import functools
+import importlib.abc
+import importlib.machinery
+import importlib.util
+import io
+import itertools
+import marshal
+import os
+import struct
+import sys
+import tokenize
+import types
+from pathlib import Path
+from pathlib import PurePath
+from typing import Callable
+from typing import Dict
+from typing import IO
+from typing import Iterable
+from typing import Iterator
+from typing import List
+from typing import Optional
+from typing import Sequence
+from typing import Set
+from typing import Tuple
+from typing import TYPE_CHECKING
+from typing import Union
+
+from _pytest._io.saferepr import DEFAULT_REPR_MAX_SIZE
+from _pytest._io.saferepr import saferepr
+from _pytest._version import version
+from _pytest.assertion import util
+from _pytest.assertion.util import (  # noqa: F401
+    format_explanation as _format_explanation,
+)
+from _pytest.config import Config
+from _pytest.main import Session
+from _pytest.pathlib import absolutepath
+from _pytest.pathlib import fnmatch_ex
+from _pytest.stash import StashKey
+
+if TYPE_CHECKING:
+    from _pytest.assertion import AssertionState
+
+if sys.version_info >= (3, 8):
+    namedExpr = ast.NamedExpr
+    astNameConstant = ast.Constant
+    astStr = ast.Constant
+    astNum = ast.Constant
+else:
+    namedExpr = ast.Expr
+    astNameConstant = ast.NameConstant
+    astStr = ast.Str
+    astNum = ast.Num
+
+
+assertstate_key = StashKey["AssertionState"]()
+
+# pytest caches rewritten pycs in pycache dirs
+PYTEST_TAG = f"{sys.implementation.cache_tag}-pytest-{version}"
+PYC_EXT = ".py" + (__debug__ and "c" or "o")
+PYC_TAIL = "." + PYTEST_TAG + PYC_EXT
+
+
+class AssertionRewritingHook(importlib.abc.MetaPathFinder, importlib.abc.Loader):
+    """PEP302/PEP451 import hook which rewrites asserts."""
+
+    def __init__(self, config: Config) -> None:
+        self.config = config
+        try:
+            self.fnpats = config.getini("python_files")
+        except ValueError:
+            self.fnpats = ["test_*.py", "*_test.py"]
+        self.session: Optional[Session] = None
+        self._rewritten_names: Dict[str, Path] = {}
+        self._must_rewrite: Set[str] = set()
+        # flag to guard against trying to rewrite a pyc file while we are already writing another pyc file,
+        # which might result in infinite recursion (#3506)
+        self._writing_pyc = False
+        self._basenames_to_check_rewrite = {"conftest"}
+        self._marked_for_rewrite_cache: Dict[str, bool] = {}
+        self._session_paths_checked = False
+
+    def set_session(self, session: Optional[Session]) -> None:
+        self.session = session
+        self._session_paths_checked = False
+
+    # Indirection so we can mock calls to find_spec originated from the hook during testing
+    _find_spec = importlib.machinery.PathFinder.find_spec
+
+    def find_spec(
+        self,
+        name: str,
+        path: Optional[Sequence[Union[str, bytes]]] = None,
+        target: Optional[types.ModuleType] = None,
+    ) -> Optional[importlib.machinery.ModuleSpec]:
+        if self._writing_pyc:
+            return None
+        state = self.config.stash[assertstate_key]
+        if self._early_rewrite_bailout(name, state):
+            return None
+        state.trace("find_module called for: %s" % name)
+
+        # Type ignored because mypy is confused about the `self` binding here.
+        spec = self._find_spec(name, path)  # type: ignore
+        if (
+            # the import machinery could not find a file to import
+            spec is None
+            # this is a namespace package (without `__init__.py`)
+            # there's nothing to rewrite there
+            or spec.origin is None
+            # we can only rewrite source files
+            or not isinstance(spec.loader, importlib.machinery.SourceFileLoader)
+            # if the file doesn't exist, we can't rewrite it
+            or not os.path.exists(spec.origin)
+        ):
+            return None
+        else:
+            fn = spec.origin
+
+        if not self._should_rewrite(name, fn, state):
+            return None
+
+        return importlib.util.spec_from_file_location(
+            name,
+            fn,
+            loader=self,
+            submodule_search_locations=spec.submodule_search_locations,
+        )
+
+    def create_module(
+        self, spec: importlib.machinery.ModuleSpec
+    ) -> Optional[types.ModuleType]:
+        return None  # default behaviour is fine
+
+    def exec_module(self, module: types.ModuleType) -> None:
+        assert module.__spec__ is not None
+        assert module.__spec__.origin is not None
+        fn = Path(module.__spec__.origin)
+        state = self.config.stash[assertstate_key]
+
+        self._rewritten_names[module.__name__] = fn
+
+        # The requested module looks like a test file, so rewrite it. This is
+        # the most magical part of the process: load the source, rewrite the
+        # asserts, and load the rewritten source. We also cache the rewritten
+        # module code in a special pyc. We must be aware of the possibility of
+        # concurrent pytest processes rewriting and loading pycs. To avoid
+        # tricky race conditions, we maintain the following invariant: The
+        # cached pyc is always a complete, valid pyc. Operations on it must be
+        # atomic. POSIX's atomic rename comes in handy.
+        write = not sys.dont_write_bytecode
+        cache_dir = get_cache_dir(fn)
+        if write:
+            ok = try_makedirs(cache_dir)
+            if not ok:
+                write = False
+                state.trace(f"read only directory: {cache_dir}")
+
+        cache_name = fn.name[:-3] + PYC_TAIL
+        pyc = cache_dir / cache_name
+        # Notice that even if we're in a read-only directory, I'm going
+        # to check for a cached pyc. This may not be optimal...
+        co = _read_pyc(fn, pyc, state.trace)
+        if co is None:
+            state.trace(f"rewriting {fn!r}")
+            source_stat, co = _rewrite_test(fn, self.config)
+            if write:
+                self._writing_pyc = True
+                try:
+                    _write_pyc(state, co, source_stat, pyc)
+                finally:
+                    self._writing_pyc = False
+        else:
+            state.trace(f"found cached rewritten pyc for {fn}")
+        exec(co, module.__dict__)
+
+    def _early_rewrite_bailout(self, name: str, state: "AssertionState") -> bool:
+        """A fast way to get out of rewriting modules.
+
+        Profiling has shown that the call to PathFinder.find_spec (inside of
+        the find_spec from this class) is a major slowdown, so, this method
+        tries to filter what we're sure won't be rewritten before getting to
+        it.
+        """
+        if self.session is not None and not self._session_paths_checked:
+            self._session_paths_checked = True
+            for initial_path in self.session._initialpaths:
+                # Make something as c:/projects/my_project/path.py ->
+                #     ['c:', 'projects', 'my_project', 'path.py']
+                parts = str(initial_path).split(os.sep)
+                # add 'path' to basenames to be checked.
+                self._basenames_to_check_rewrite.add(os.path.splitext(parts[-1])[0])
+
+        # Note: conftest already by default in _basenames_to_check_rewrite.
+        parts = name.split(".")
+        if parts[-1] in self._basenames_to_check_rewrite:
+            return False
+
+        # For matching the name it must be as if it was a filename.
+        path = PurePath(*parts).with_suffix(".py")
+
+        for pat in self.fnpats:
+            # if the pattern contains subdirectories ("tests/**.py" for example) we can't bail out based
+            # on the name alone because we need to match against the full path
+            if os.path.dirname(pat):
+                return False
+            if fnmatch_ex(pat, path):
+                return False
+
+        if self._is_marked_for_rewrite(name, state):
+            return False
+
+        state.trace(f"early skip of rewriting module: {name}")
+        return True
+
+    def _should_rewrite(self, name: str, fn: str, state: "AssertionState") -> bool:
+        # always rewrite conftest files
+        if os.path.basename(fn) == "conftest.py":
+            state.trace(f"rewriting conftest file: {fn!r}")
+            return True
+
+        if self.session is not None:
+            if self.session.isinitpath(absolutepath(fn)):
+                state.trace(f"matched test file (was specified on cmdline): {fn!r}")
+                return True
+
+        # modules not passed explicitly on the command line are only
+        # rewritten if they match the naming convention for test files
+        fn_path = PurePath(fn)
+        for pat in self.fnpats:
+            if fnmatch_ex(pat, fn_path):
+                state.trace(f"matched test file {fn!r}")
+                return True
+
+        return self._is_marked_for_rewrite(name, state)
+
+    def _is_marked_for_rewrite(self, name: str, state: "AssertionState") -> bool:
+        try:
+            return self._marked_for_rewrite_cache[name]
+        except KeyError:
+            for marked in self._must_rewrite:
+                if name == marked or name.startswith(marked + "."):
+                    state.trace(f"matched marked file {name!r} (from {marked!r})")
+                    self._marked_for_rewrite_cache[name] = True
+                    return True
+
+            self._marked_for_rewrite_cache[name] = False
+            return False
+
+    def mark_rewrite(self, *names: str) -> None:
+        """Mark import names as needing to be rewritten.
+
+        The named module or package as well as any nested modules will
+        be rewritten on import.
+        """
+        already_imported = (
+            set(names).intersection(sys.modules).difference(self._rewritten_names)
+        )
+        for name in already_imported:
+            mod = sys.modules[name]
+            if not AssertionRewriter.is_rewrite_disabled(
+                mod.__doc__ or ""
+            ) and not isinstance(mod.__loader__, type(self)):
+                self._warn_already_imported(name)
+        self._must_rewrite.update(names)
+        self._marked_for_rewrite_cache.clear()
+
+    def _warn_already_imported(self, name: str) -> None:
+        from _pytest.warning_types import PytestAssertRewriteWarning
+
+        self.config.issue_config_time_warning(
+            PytestAssertRewriteWarning(
+                "Module already imported so cannot be rewritten: %s" % name
+            ),
+            stacklevel=5,
+        )
+
+    def get_data(self, pathname: Union[str, bytes]) -> bytes:
+        """Optional PEP302 get_data API."""
+        with open(pathname, "rb") as f:
+            return f.read()
+
+    if sys.version_info >= (3, 10):
+        if sys.version_info >= (3, 12):
+            from importlib.resources.abc import TraversableResources
+        else:
+            from importlib.abc import TraversableResources
+
+        def get_resource_reader(self, name: str) -> TraversableResources:  # type: ignore
+            if sys.version_info < (3, 11):
+                from importlib.readers import FileReader
+            else:
+                from importlib.resources.readers import FileReader
+
+            return FileReader(  # type:ignore[no-any-return]
+                types.SimpleNamespace(path=self._rewritten_names[name])
+            )
+
+
+def _write_pyc_fp(
+    fp: IO[bytes], source_stat: os.stat_result, co: types.CodeType
+) -> None:
+    # Technically, we don't have to have the same pyc format as
+    # (C)Python, since these "pycs" should never be seen by builtin
+    # import. However, there's little reason to deviate.
+    fp.write(importlib.util.MAGIC_NUMBER)
+    # https://www.python.org/dev/peps/pep-0552/
+    flags = b"\x00\x00\x00\x00"
+    fp.write(flags)
+    # as of now, bytecode header expects 32-bit numbers for size and mtime (#4903)
+    mtime = int(source_stat.st_mtime) & 0xFFFFFFFF
+    size = source_stat.st_size & 0xFFFFFFFF
+    # "<LL" stands for 2 unsigned longs, little-endian.
+    fp.write(struct.pack("<LL", mtime, size))
+    fp.write(marshal.dumps(co))
+
+
+def _write_pyc(
+    state: "AssertionState",
+    co: types.CodeType,
+    source_stat: os.stat_result,
+    pyc: Path,
+) -> bool:
+    proc_pyc = f"{pyc}.{os.getpid()}"
+    try:
+        with open(proc_pyc, "wb") as fp:
+            _write_pyc_fp(fp, source_stat, co)
+    except OSError as e:
+        state.trace(f"error writing pyc file at {proc_pyc}: errno={e.errno}")
+        return False
+
+    try:
+        os.replace(proc_pyc, pyc)
+    except OSError as e:
+        state.trace(f"error writing pyc file at {pyc}: {e}")
+        # we ignore any failure to write the cache file
+        # there are many reasons, permission-denied, pycache dir being a
+        # file etc.
+        return False
+    return True
+
+
+def _rewrite_test(fn: Path, config: Config) -> Tuple[os.stat_result, types.CodeType]:
+    """Read and rewrite *fn* and return the code object."""
+    stat = os.stat(fn)
+    source = fn.read_bytes()
+    strfn = str(fn)
+    tree = ast.parse(source, filename=strfn)
+    rewrite_asserts(tree, source, strfn, config)
+    co = compile(tree, strfn, "exec", dont_inherit=True)
+    return stat, co
+
+
+def _read_pyc(
+    source: Path, pyc: Path, trace: Callable[[str], None] = lambda x: None
+) -> Optional[types.CodeType]:
+    """Possibly read a pytest pyc containing rewritten code.
+
+    Return rewritten code if successful or None if not.
+    """
+    try:
+        fp = open(pyc, "rb")
+    except OSError:
+        return None
+    with fp:
+        try:
+            stat_result = os.stat(source)
+            mtime = int(stat_result.st_mtime)
+            size = stat_result.st_size
+            data = fp.read(16)
+        except OSError as e:
+            trace(f"_read_pyc({source}): OSError {e}")
+            return None
+        # Check for invalid or out of date pyc file.
+        if len(data) != (16):
+            trace("_read_pyc(%s): invalid pyc (too short)" % source)
+            return None
+        if data[:4] != importlib.util.MAGIC_NUMBER:
+            trace("_read_pyc(%s): invalid pyc (bad magic number)" % source)
+            return None
+        if data[4:8] != b"\x00\x00\x00\x00":
+            trace("_read_pyc(%s): invalid pyc (unsupported flags)" % source)
+            return None
+        mtime_data = data[8:12]
+        if int.from_bytes(mtime_data, "little") != mtime & 0xFFFFFFFF:
+            trace("_read_pyc(%s): out of date" % source)
+            return None
+        size_data = data[12:16]
+        if int.from_bytes(size_data, "little") != size & 0xFFFFFFFF:
+            trace("_read_pyc(%s): invalid pyc (incorrect size)" % source)
+            return None
+        try:
+            co = marshal.load(fp)
+        except Exception as e:
+            trace(f"_read_pyc({source}): marshal.load error {e}")
+            return None
+        if not isinstance(co, types.CodeType):
+            trace("_read_pyc(%s): not a code object" % source)
+            return None
+        return co
+
+
+def rewrite_asserts(
+    mod: ast.Module,
+    source: bytes,
+    module_path: Optional[str] = None,
+    config: Optional[Config] = None,
+) -> None:
+    """Rewrite the assert statements in mod."""
+    AssertionRewriter(module_path, config, source).run(mod)
+
+
+def _saferepr(obj: object) -> str:
+    r"""Get a safe repr of an object for assertion error messages.
+
+    The assertion formatting (util.format_explanation()) requires
+    newlines to be escaped since they are a special character for it.
+    Normally assertion.util.format_explanation() does this but for a
+    custom repr it is possible to contain one of the special escape
+    sequences, especially '\n{' and '\n}' are likely to be present in
+    JSON reprs.
+    """
+    maxsize = _get_maxsize_for_saferepr(util._config)
+    return saferepr(obj, maxsize=maxsize).replace("\n", "\\n")
+
+
+def _get_maxsize_for_saferepr(config: Optional[Config]) -> Optional[int]:
+    """Get `maxsize` configuration for saferepr based on the given config object."""
+    verbosity = config.getoption("verbose") if config is not None else 0
+    if verbosity >= 2:
+        return None
+    if verbosity >= 1:
+        return DEFAULT_REPR_MAX_SIZE * 10
+    return DEFAULT_REPR_MAX_SIZE
+
+
+def _format_assertmsg(obj: object) -> str:
+    r"""Format the custom assertion message given.
+
+    For strings this simply replaces newlines with '\n~' so that
+    util.format_explanation() will preserve them instead of escaping
+    newlines.  For other objects saferepr() is used first.
+    """
+    # reprlib appears to have a bug which means that if a string
+    # contains a newline it gets escaped, however if an object has a
+    # .__repr__() which contains newlines it does not get escaped.
+    # However in either case we want to preserve the newline.
+    replaces = [("\n", "\n~"), ("%", "%%")]
+    if not isinstance(obj, str):
+        obj = saferepr(obj)
+        replaces.append(("\\n", "\n~"))
+
+    for r1, r2 in replaces:
+        obj = obj.replace(r1, r2)
+
+    return obj
+
+
+def _should_repr_global_name(obj: object) -> bool:
+    if callable(obj):
+        return False
+
+    try:
+        return not hasattr(obj, "__name__")
+    except Exception:
+        return True
+
+
+def _format_boolop(explanations: Iterable[str], is_or: bool) -> str:
+    explanation = "(" + (is_or and " or " or " and ").join(explanations) + ")"
+    return explanation.replace("%", "%%")
+
+
+def _call_reprcompare(
+    ops: Sequence[str],
+    results: Sequence[bool],
+    expls: Sequence[str],
+    each_obj: Sequence[object],
+) -> str:
+    for i, res, expl in zip(range(len(ops)), results, expls):
+        try:
+            done = not res
+        except Exception:
+            done = True
+        if done:
+            break
+    if util._reprcompare is not None:
+        custom = util._reprcompare(ops[i], each_obj[i], each_obj[i + 1])
+        if custom is not None:
+            return custom
+    return expl
+
+
+def _call_assertion_pass(lineno: int, orig: str, expl: str) -> None:
+    if util._assertion_pass is not None:
+        util._assertion_pass(lineno, orig, expl)
+
+
+def _check_if_assertion_pass_impl() -> bool:
+    """Check if any plugins implement the pytest_assertion_pass hook
+    in order not to generate explanation unnecessarily (might be expensive)."""
+    return True if util._assertion_pass else False
+
+
+UNARY_MAP = {ast.Not: "not %s", ast.Invert: "~%s", ast.USub: "-%s", ast.UAdd: "+%s"}
+
+BINOP_MAP = {
+    ast.BitOr: "|",
+    ast.BitXor: "^",
+    ast.BitAnd: "&",
+    ast.LShift: "<<",
+    ast.RShift: ">>",
+    ast.Add: "+",
+    ast.Sub: "-",
+    ast.Mult: "*",
+    ast.Div: "/",
+    ast.FloorDiv: "//",
+    ast.Mod: "%%",  # escaped for string formatting
+    ast.Eq: "==",
+    ast.NotEq: "!=",
+    ast.Lt: "<",
+    ast.LtE: "<=",
+    ast.Gt: ">",
+    ast.GtE: ">=",
+    ast.Pow: "**",
+    ast.Is: "is",
+    ast.IsNot: "is not",
+    ast.In: "in",
+    ast.NotIn: "not in",
+    ast.MatMult: "@",
+}
+
+
+def traverse_node(node: ast.AST) -> Iterator[ast.AST]:
+    """Recursively yield node and all its children in depth-first order."""
+    yield node
+    for child in ast.iter_child_nodes(node):
+        yield from traverse_node(child)
+
+
+@functools.lru_cache(maxsize=1)
+def _get_assertion_exprs(src: bytes) -> Dict[int, str]:
+    """Return a mapping from {lineno: "assertion test expression"}."""
+    ret: Dict[int, str] = {}
+
+    depth = 0
+    lines: List[str] = []
+    assert_lineno: Optional[int] = None
+    seen_lines: Set[int] = set()
+
+    def _write_and_reset() -> None:
+        nonlocal depth, lines, assert_lineno, seen_lines
+        assert assert_lineno is not None
+        ret[assert_lineno] = "".join(lines).rstrip().rstrip("\\")
+        depth = 0
+        lines = []
+        assert_lineno = None
+        seen_lines = set()
+
+    tokens = tokenize.tokenize(io.BytesIO(src).readline)
+    for tp, source, (lineno, offset), _, line in tokens:
+        if tp == tokenize.NAME and source == "assert":
+            assert_lineno = lineno
+        elif assert_lineno is not None:
+            # keep track of depth for the assert-message `,` lookup
+            if tp == tokenize.OP and source in "([{":
+                depth += 1
+            elif tp == tokenize.OP and source in ")]}":
+                depth -= 1
+
+            if not lines:
+                lines.append(line[offset:])
+                seen_lines.add(lineno)
+            # a non-nested comma separates the expression from the message
+            elif depth == 0 and tp == tokenize.OP and source == ",":
+                # one line assert with message
+                if lineno in seen_lines and len(lines) == 1:
+                    offset_in_trimmed = offset + len(lines[-1]) - len(line)
+                    lines[-1] = lines[-1][:offset_in_trimmed]
+                # multi-line assert with message
+                elif lineno in seen_lines:
+                    lines[-1] = lines[-1][:offset]
+                # multi line assert with escapd newline before message
+                else:
+                    lines.append(line[:offset])
+                _write_and_reset()
+            elif tp in {tokenize.NEWLINE, tokenize.ENDMARKER}:
+                _write_and_reset()
+            elif lines and lineno not in seen_lines:
+                lines.append(line)
+                seen_lines.add(lineno)
+
+    return ret
+
+
+class AssertionRewriter(ast.NodeVisitor):
+    """Assertion rewriting implementation.
+
+    The main entrypoint is to call .run() with an ast.Module instance,
+    this will then find all the assert statements and rewrite them to
+    provide intermediate values and a detailed assertion error.  See
+    http://pybites.blogspot.be/2011/07/behind-scenes-of-pytests-new-assertion.html
+    for an overview of how this works.
+
+    The entry point here is .run() which will iterate over all the
+    statements in an ast.Module and for each ast.Assert statement it
+    finds call .visit() with it.  Then .visit_Assert() takes over and
+    is responsible for creating new ast statements to replace the
+    original assert statement: it rewrites the test of an assertion
+    to provide intermediate values and replace it with an if statement
+    which raises an assertion error with a detailed explanation in
+    case the expression is false and calls pytest_assertion_pass hook
+    if expression is true.
+
+    For this .visit_Assert() uses the visitor pattern to visit all the
+    AST nodes of the ast.Assert.test field, each visit call returning
+    an AST node and the corresponding explanation string.  During this
+    state is kept in several instance attributes:
+
+    :statements: All the AST statements which will replace the assert
+       statement.
+
+    :variables: This is populated by .variable() with each variable
+       used by the statements so that they can all be set to None at
+       the end of the statements.
+
+    :variable_counter: Counter to create new unique variables needed
+       by statements.  Variables are created using .variable() and
+       have the form of "@py_assert0".
+
+    :expl_stmts: The AST statements which will be executed to get
+       data from the assertion.  This is the code which will construct
+       the detailed assertion message that is used in the AssertionError
+       or for the pytest_assertion_pass hook.
+
+    :explanation_specifiers: A dict filled by .explanation_param()
+       with %-formatting placeholders and their corresponding
+       expressions to use in the building of an assertion message.
+       This is used by .pop_format_context() to build a message.
+
+    :stack: A stack of the explanation_specifiers dicts maintained by
+       .push_format_context() and .pop_format_context() which allows
+       to build another %-formatted string while already building one.
+
+    :variables_overwrite: A dict filled with references to variables
+       that change value within an assert. This happens when a variable is
+       reassigned with the walrus operator
+
+    This state, except the variables_overwrite,  is reset on every new assert
+    statement visited and used by the other visitors.
+    """
+
+    def __init__(
+        self, module_path: Optional[str], config: Optional[Config], source: bytes
+    ) -> None:
+        super().__init__()
+        self.module_path = module_path
+        self.config = config
+        if config is not None:
+            self.enable_assertion_pass_hook = config.getini(
+                "enable_assertion_pass_hook"
+            )
+        else:
+            self.enable_assertion_pass_hook = False
+        self.source = source
+        self.variables_overwrite: Dict[str, str] = {}
+
+    def run(self, mod: ast.Module) -> None:
+        """Find all assert statements in *mod* and rewrite them."""
+        if not mod.body:
+            # Nothing to do.
+            return
+
+        # We'll insert some special imports at the top of the module, but after any
+        # docstrings and __future__ imports, so first figure out where that is.
+        doc = getattr(mod, "docstring", None)
+        expect_docstring = doc is None
+        if doc is not None and self.is_rewrite_disabled(doc):
+            return
+        pos = 0
+        item = None
+        for item in mod.body:
+            if (
+                expect_docstring
+                and isinstance(item, ast.Expr)
+                and isinstance(item.value, astStr)
+            ):
+                if sys.version_info >= (3, 8):
+                    doc = item.value.value
+                else:
+                    doc = item.value.s
+                if self.is_rewrite_disabled(doc):
+                    return
+                expect_docstring = False
+            elif (
+                isinstance(item, ast.ImportFrom)
+                and item.level == 0
+                and item.module == "__future__"
+            ):
+                pass
+            else:
+                break
+            pos += 1
+        # Special case: for a decorated function, set the lineno to that of the
+        # first decorator, not the `def`. Issue #4984.
+        if isinstance(item, ast.FunctionDef) and item.decorator_list:
+            lineno = item.decorator_list[0].lineno
+        else:
+            lineno = item.lineno
+        # Now actually insert the special imports.
+        if sys.version_info >= (3, 10):
+            aliases = [
+                ast.alias("builtins", "@py_builtins", lineno=lineno, col_offset=0),
+                ast.alias(
+                    "_pytest.assertion.rewrite",
+                    "@pytest_ar",
+                    lineno=lineno,
+                    col_offset=0,
+                ),
+            ]
+        else:
+            aliases = [
+                ast.alias("builtins", "@py_builtins"),
+                ast.alias("_pytest.assertion.rewrite", "@pytest_ar"),
+            ]
+        imports = [
+            ast.Import([alias], lineno=lineno, col_offset=0) for alias in aliases
+        ]
+        mod.body[pos:pos] = imports
+
+        # Collect asserts.
+        nodes: List[ast.AST] = [mod]
+        while nodes:
+            node = nodes.pop()
+            for name, field in ast.iter_fields(node):
+                if isinstance(field, list):
+                    new: List[ast.AST] = []
+                    for i, child in enumerate(field):
+                        if isinstance(child, ast.Assert):
+                            # Transform assert.
+                            new.extend(self.visit(child))
+                        else:
+                            new.append(child)
+                            if isinstance(child, ast.AST):
+                                nodes.append(child)
+                    setattr(node, name, new)
+                elif (
+                    isinstance(field, ast.AST)
+                    # Don't recurse into expressions as they can't contain
+                    # asserts.
+                    and not isinstance(field, ast.expr)
+                ):
+                    nodes.append(field)
+
+    @staticmethod
+    def is_rewrite_disabled(docstring: str) -> bool:
+        return "PYTEST_DONT_REWRITE" in docstring
+
+    def variable(self) -> str:
+        """Get a new variable."""
+        # Use a character invalid in python identifiers to avoid clashing.
+        name = "@py_assert" + str(next(self.variable_counter))
+        self.variables.append(name)
+        return name
+
+    def assign(self, expr: ast.expr) -> ast.Name:
+        """Give *expr* a name."""
+        name = self.variable()
+        self.statements.append(ast.Assign([ast.Name(name, ast.Store())], expr))
+        return ast.Name(name, ast.Load())
+
+    def display(self, expr: ast.expr) -> ast.expr:
+        """Call saferepr on the expression."""
+        return self.helper("_saferepr", expr)
+
+    def helper(self, name: str, *args: ast.expr) -> ast.expr:
+        """Call a helper in this module."""
+        py_name = ast.Name("@pytest_ar", ast.Load())
+        attr = ast.Attribute(py_name, name, ast.Load())
+        return ast.Call(attr, list(args), [])
+
+    def builtin(self, name: str) -> ast.Attribute:
+        """Return the builtin called *name*."""
+        builtin_name = ast.Name("@py_builtins", ast.Load())
+        return ast.Attribute(builtin_name, name, ast.Load())
+
+    def explanation_param(self, expr: ast.expr) -> str:
+        """Return a new named %-formatting placeholder for expr.
+
+        This creates a %-formatting placeholder for expr in the
+        current formatting context, e.g. ``%(py0)s``.  The placeholder
+        and expr are placed in the current format context so that it
+        can be used on the next call to .pop_format_context().
+        """
+        specifier = "py" + str(next(self.variable_counter))
+        self.explanation_specifiers[specifier] = expr
+        return "%(" + specifier + ")s"
+
+    def push_format_context(self) -> None:
+        """Create a new formatting context.
+
+        The format context is used for when an explanation wants to
+        have a variable value formatted in the assertion message.  In
+        this case the value required can be added using
+        .explanation_param().  Finally .pop_format_context() is used
+        to format a string of %-formatted values as added by
+        .explanation_param().
+        """
+        self.explanation_specifiers: Dict[str, ast.expr] = {}
+        self.stack.append(self.explanation_specifiers)
+
+    def pop_format_context(self, expl_expr: ast.expr) -> ast.Name:
+        """Format the %-formatted string with current format context.
+
+        The expl_expr should be an str ast.expr instance constructed from
+        the %-placeholders created by .explanation_param().  This will
+        add the required code to format said string to .expl_stmts and
+        return the ast.Name instance of the formatted string.
+        """
+        current = self.stack.pop()
+        if self.stack:
+            self.explanation_specifiers = self.stack[-1]
+        keys = [astStr(key) for key in current.keys()]
+        format_dict = ast.Dict(keys, list(current.values()))
+        form = ast.BinOp(expl_expr, ast.Mod(), format_dict)
+        name = "@py_format" + str(next(self.variable_counter))
+        if self.enable_assertion_pass_hook:
+            self.format_variables.append(name)
+        self.expl_stmts.append(ast.Assign([ast.Name(name, ast.Store())], form))
+        return ast.Name(name, ast.Load())
+
+    def generic_visit(self, node: ast.AST) -> Tuple[ast.Name, str]:
+        """Handle expressions we don't have custom code for."""
+        assert isinstance(node, ast.expr)
+        res = self.assign(node)
+        return res, self.explanation_param(self.display(res))
+
+    def visit_Assert(self, assert_: ast.Assert) -> List[ast.stmt]:
+        """Return the AST statements to replace the ast.Assert instance.
+
+        This rewrites the test of an assertion to provide
+        intermediate values and replace it with an if statement which
+        raises an assertion error with a detailed explanation in case
+        the expression is false.
+        """
+        if isinstance(assert_.test, ast.Tuple) and len(assert_.test.elts) >= 1:
+            from _pytest.warning_types import PytestAssertRewriteWarning
+            import warnings
+
+            # TODO: This assert should not be needed.
+            assert self.module_path is not None
+            warnings.warn_explicit(
+                PytestAssertRewriteWarning(
+                    "assertion is always true, perhaps remove parentheses?"
+                ),
+                category=None,
+                filename=self.module_path,
+                lineno=assert_.lineno,
+            )
+
+        self.statements: List[ast.stmt] = []
+        self.variables: List[str] = []
+        self.variable_counter = itertools.count()
+
+        if self.enable_assertion_pass_hook:
+            self.format_variables: List[str] = []
+
+        self.stack: List[Dict[str, ast.expr]] = []
+        self.expl_stmts: List[ast.stmt] = []
+        self.push_format_context()
+        # Rewrite assert into a bunch of statements.
+        top_condition, explanation = self.visit(assert_.test)
+
+        negation = ast.UnaryOp(ast.Not(), top_condition)
+
+        if self.enable_assertion_pass_hook:  # Experimental pytest_assertion_pass hook
+            msg = self.pop_format_context(astStr(explanation))
+
+            # Failed
+            if assert_.msg:
+                assertmsg = self.helper("_format_assertmsg", assert_.msg)
+                gluestr = "\n>assert "
+            else:
+                assertmsg = astStr("")
+                gluestr = "assert "
+            err_explanation = ast.BinOp(astStr(gluestr), ast.Add(), msg)
+            err_msg = ast.BinOp(assertmsg, ast.Add(), err_explanation)
+            err_name = ast.Name("AssertionError", ast.Load())
+            fmt = self.helper("_format_explanation", err_msg)
+            exc = ast.Call(err_name, [fmt], [])
+            raise_ = ast.Raise(exc, None)
+            statements_fail = []
+            statements_fail.extend(self.expl_stmts)
+            statements_fail.append(raise_)
+
+            # Passed
+            fmt_pass = self.helper("_format_explanation", msg)
+            orig = _get_assertion_exprs(self.source)[assert_.lineno]
+            hook_call_pass = ast.Expr(
+                self.helper(
+                    "_call_assertion_pass",
+                    astNum(assert_.lineno),
+                    astStr(orig),
+                    fmt_pass,
+                )
+            )
+            # If any hooks implement assert_pass hook
+            hook_impl_test = ast.If(
+                self.helper("_check_if_assertion_pass_impl"),
+                self.expl_stmts + [hook_call_pass],
+                [],
+            )
+            statements_pass = [hook_impl_test]
+
+            # Test for assertion condition
+            main_test = ast.If(negation, statements_fail, statements_pass)
+            self.statements.append(main_test)
+            if self.format_variables:
+                variables = [
+                    ast.Name(name, ast.Store()) for name in self.format_variables
+                ]
+                clear_format = ast.Assign(variables, astNameConstant(None))
+                self.statements.append(clear_format)
+
+        else:  # Original assertion rewriting
+            # Create failure message.
+            body = self.expl_stmts
+            self.statements.append(ast.If(negation, body, []))
+            if assert_.msg:
+                assertmsg = self.helper("_format_assertmsg", assert_.msg)
+                explanation = "\n>assert " + explanation
+            else:
+                assertmsg = astStr("")
+                explanation = "assert " + explanation
+            template = ast.BinOp(assertmsg, ast.Add(), astStr(explanation))
+            msg = self.pop_format_context(template)
+            fmt = self.helper("_format_explanation", msg)
+            err_name = ast.Name("AssertionError", ast.Load())
+            exc = ast.Call(err_name, [fmt], [])
+            raise_ = ast.Raise(exc, None)
+
+            body.append(raise_)
+
+        # Clear temporary variables by setting them to None.
+        if self.variables:
+            variables = [ast.Name(name, ast.Store()) for name in self.variables]
+            clear = ast.Assign(variables, astNameConstant(None))
+            self.statements.append(clear)
+        # Fix locations (line numbers/column offsets).
+        for stmt in self.statements:
+            for node in traverse_node(stmt):
+                ast.copy_location(node, assert_)
+        return self.statements
+
+    def visit_NamedExpr(self, name: namedExpr) -> Tuple[namedExpr, str]:
+        # This method handles the 'walrus operator' repr of the target
+        # name if it's a local variable or _should_repr_global_name()
+        # thinks it's acceptable.
+        locs = ast.Call(self.builtin("locals"), [], [])
+        target_id = name.target.id  # type: ignore[attr-defined]
+        inlocs = ast.Compare(astStr(target_id), [ast.In()], [locs])
+        dorepr = self.helper("_should_repr_global_name", name)
+        test = ast.BoolOp(ast.Or(), [inlocs, dorepr])
+        expr = ast.IfExp(test, self.display(name), astStr(target_id))
+        return name, self.explanation_param(expr)
+
+    def visit_Name(self, name: ast.Name) -> Tuple[ast.Name, str]:
+        # Display the repr of the name if it's a local variable or
+        # _should_repr_global_name() thinks it's acceptable.
+        locs = ast.Call(self.builtin("locals"), [], [])
+        inlocs = ast.Compare(astStr(name.id), [ast.In()], [locs])
+        dorepr = self.helper("_should_repr_global_name", name)
+        test = ast.BoolOp(ast.Or(), [inlocs, dorepr])
+        expr = ast.IfExp(test, self.display(name), astStr(name.id))
+        return name, self.explanation_param(expr)
+
+    def visit_BoolOp(self, boolop: ast.BoolOp) -> Tuple[ast.Name, str]:
+        res_var = self.variable()
+        expl_list = self.assign(ast.List([], ast.Load()))
+        app = ast.Attribute(expl_list, "append", ast.Load())
+        is_or = int(isinstance(boolop.op, ast.Or))
+        body = save = self.statements
+        fail_save = self.expl_stmts
+        levels = len(boolop.values) - 1
+        self.push_format_context()
+        # Process each operand, short-circuiting if needed.
+        for i, v in enumerate(boolop.values):
+            if i:
+                fail_inner: List[ast.stmt] = []
+                # cond is set in a prior loop iteration below
+                self.expl_stmts.append(ast.If(cond, fail_inner, []))  # noqa
+                self.expl_stmts = fail_inner
+                # Check if the left operand is a namedExpr and the value has already been visited
+                if (
+                    isinstance(v, ast.Compare)
+                    and isinstance(v.left, namedExpr)
+                    and v.left.target.id
+                    in [
+                        ast_expr.id
+                        for ast_expr in boolop.values[:i]
+                        if hasattr(ast_expr, "id")
+                    ]
+                ):
+                    pytest_temp = self.variable()
+                    self.variables_overwrite[
+                        v.left.target.id
+                    ] = v.left  # type:ignore[assignment]
+                    v.left.target.id = pytest_temp
+            self.push_format_context()
+            res, expl = self.visit(v)
+            body.append(ast.Assign([ast.Name(res_var, ast.Store())], res))
+            expl_format = self.pop_format_context(astStr(expl))
+            call = ast.Call(app, [expl_format], [])
+            self.expl_stmts.append(ast.Expr(call))
+            if i < levels:
+                cond: ast.expr = res
+                if is_or:
+                    cond = ast.UnaryOp(ast.Not(), cond)
+                inner: List[ast.stmt] = []
+                self.statements.append(ast.If(cond, inner, []))
+                self.statements = body = inner
+        self.statements = save
+        self.expl_stmts = fail_save
+        expl_template = self.helper("_format_boolop", expl_list, astNum(is_or))
+        expl = self.pop_format_context(expl_template)
+        return ast.Name(res_var, ast.Load()), self.explanation_param(expl)
+
+    def visit_UnaryOp(self, unary: ast.UnaryOp) -> Tuple[ast.Name, str]:
+        pattern = UNARY_MAP[unary.op.__class__]
+        operand_res, operand_expl = self.visit(unary.operand)
+        res = self.assign(ast.UnaryOp(unary.op, operand_res))
+        return res, pattern % (operand_expl,)
+
+    def visit_BinOp(self, binop: ast.BinOp) -> Tuple[ast.Name, str]:
+        symbol = BINOP_MAP[binop.op.__class__]
+        left_expr, left_expl = self.visit(binop.left)
+        right_expr, right_expl = self.visit(binop.right)
+        explanation = f"({left_expl} {symbol} {right_expl})"
+        res = self.assign(ast.BinOp(left_expr, binop.op, right_expr))
+        return res, explanation
+
+    def visit_Call(self, call: ast.Call) -> Tuple[ast.Name, str]:
+        new_func, func_expl = self.visit(call.func)
+        arg_expls = []
+        new_args = []
+        new_kwargs = []
+        for arg in call.args:
+            if isinstance(arg, ast.Name) and arg.id in self.variables_overwrite:
+                arg = self.variables_overwrite[arg.id]  # type:ignore[assignment]
+            res, expl = self.visit(arg)
+            arg_expls.append(expl)
+            new_args.append(res)
+        for keyword in call.keywords:
+            if (
+                isinstance(keyword.value, ast.Name)
+                and keyword.value.id in self.variables_overwrite
+            ):
+                keyword.value = self.variables_overwrite[
+                    keyword.value.id
+                ]  # type:ignore[assignment]
+            res, expl = self.visit(keyword.value)
+            new_kwargs.append(ast.keyword(keyword.arg, res))
+            if keyword.arg:
+                arg_expls.append(keyword.arg + "=" + expl)
+            else:  # **args have `arg` keywords with an .arg of None
+                arg_expls.append("**" + expl)
+
+        expl = "{}({})".format(func_expl, ", ".join(arg_expls))
+        new_call = ast.Call(new_func, new_args, new_kwargs)
+        res = self.assign(new_call)
+        res_expl = self.explanation_param(self.display(res))
+        outer_expl = f"{res_expl}\n{{{res_expl} = {expl}\n}}"
+        return res, outer_expl
+
+    def visit_Starred(self, starred: ast.Starred) -> Tuple[ast.Starred, str]:
+        # A Starred node can appear in a function call.
+        res, expl = self.visit(starred.value)
+        new_starred = ast.Starred(res, starred.ctx)
+        return new_starred, "*" + expl
+
+    def visit_Attribute(self, attr: ast.Attribute) -> Tuple[ast.Name, str]:
+        if not isinstance(attr.ctx, ast.Load):
+            return self.generic_visit(attr)
+        value, value_expl = self.visit(attr.value)
+        res = self.assign(ast.Attribute(value, attr.attr, ast.Load()))
+        res_expl = self.explanation_param(self.display(res))
+        pat = "%s\n{%s = %s.%s\n}"
+        expl = pat % (res_expl, res_expl, value_expl, attr.attr)
+        return res, expl
+
+    def visit_Compare(self, comp: ast.Compare) -> Tuple[ast.expr, str]:
+        self.push_format_context()
+        # We first check if we have overwritten a variable in the previous assert
+        if isinstance(comp.left, ast.Name) and comp.left.id in self.variables_overwrite:
+            comp.left = self.variables_overwrite[
+                comp.left.id
+            ]  # type:ignore[assignment]
+        if isinstance(comp.left, namedExpr):
+            self.variables_overwrite[
+                comp.left.target.id
+            ] = comp.left  # type:ignore[assignment]
+        left_res, left_expl = self.visit(comp.left)
+        if isinstance(comp.left, (ast.Compare, ast.BoolOp)):
+            left_expl = f"({left_expl})"
+        res_variables = [self.variable() for i in range(len(comp.ops))]
+        load_names = [ast.Name(v, ast.Load()) for v in res_variables]
+        store_names = [ast.Name(v, ast.Store()) for v in res_variables]
+        it = zip(range(len(comp.ops)), comp.ops, comp.comparators)
+        expls = []
+        syms = []
+        results = [left_res]
+        for i, op, next_operand in it:
+            if (
+                isinstance(next_operand, namedExpr)
+                and isinstance(left_res, ast.Name)
+                and next_operand.target.id == left_res.id
+            ):
+                next_operand.target.id = self.variable()
+                self.variables_overwrite[
+                    left_res.id
+                ] = next_operand  # type:ignore[assignment]
+            next_res, next_expl = self.visit(next_operand)
+            if isinstance(next_operand, (ast.Compare, ast.BoolOp)):
+                next_expl = f"({next_expl})"
+            results.append(next_res)
+            sym = BINOP_MAP[op.__class__]
+            syms.append(astStr(sym))
+            expl = f"{left_expl} {sym} {next_expl}"
+            expls.append(astStr(expl))
+            res_expr = ast.Compare(left_res, [op], [next_res])
+            self.statements.append(ast.Assign([store_names[i]], res_expr))
+            left_res, left_expl = next_res, next_expl
+        # Use pytest.assertion.util._reprcompare if that's available.
+        expl_call = self.helper(
+            "_call_reprcompare",
+            ast.Tuple(syms, ast.Load()),
+            ast.Tuple(load_names, ast.Load()),
+            ast.Tuple(expls, ast.Load()),
+            ast.Tuple(results, ast.Load()),
+        )
+        if len(comp.ops) > 1:
+            res: ast.expr = ast.BoolOp(ast.And(), load_names)
+        else:
+            res = load_names[0]
+
+        return res, self.explanation_param(self.pop_format_context(expl_call))
+
+
+def try_makedirs(cache_dir: Path) -> bool:
+    """Attempt to create the given directory and sub-directories exist.
+
+    Returns True if successful or if it already exists.
+    """
+    try:
+        os.makedirs(cache_dir, exist_ok=True)
+    except (FileNotFoundError, NotADirectoryError, FileExistsError):
+        # One of the path components was not a directory:
+        # - we're in a zip file
+        # - it is a file
+        return False
+    except PermissionError:
+        return False
+    except OSError as e:
+        # as of now, EROFS doesn't have an equivalent OSError-subclass
+        if e.errno == errno.EROFS:
+            return False
+        raise
+    return True
+
+
+def get_cache_dir(file_path: Path) -> Path:
+    """Return the cache directory to write .pyc files for the given .py file path."""
+    if sys.version_info >= (3, 8) and sys.pycache_prefix:
+        # given:
+        #   prefix = '/tmp/pycs'
+        #   path = '/home/user/proj/test_app.py'
+        # we want:
+        #   '/tmp/pycs/home/user/proj'
+        return Path(sys.pycache_prefix) / Path(*file_path.parts[1:-1])
+    else:
+        # classic pycache directory
+        return file_path.parent / "__pycache__"
diff --git a/contrib/python/pytest/py3/_pytest/assertion/truncate.py b/contrib/python/pytest/py3/_pytest/assertion/truncate.py
new file mode 100644
index 0000000000..dfd6f65d28
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/assertion/truncate.py
@@ -0,0 +1,115 @@
+"""Utilities for truncating assertion output.
+
+Current default behaviour is to truncate assertion explanations at
+~8 terminal lines, unless running in "-vv" mode or running on CI.
+"""
+from typing import List
+from typing import Optional
+
+from _pytest.assertion import util
+from _pytest.nodes import Item
+
+
+DEFAULT_MAX_LINES = 8
+DEFAULT_MAX_CHARS = 8 * 80
+USAGE_MSG = "use '-vv' to show"
+
+
+def truncate_if_required(
+    explanation: List[str], item: Item, max_length: Optional[int] = None
+) -> List[str]:
+    """Truncate this assertion explanation if the given test item is eligible."""
+    if _should_truncate_item(item):
+        return _truncate_explanation(explanation)
+    return explanation
+
+
+def _should_truncate_item(item: Item) -> bool:
+    """Whether or not this test item is eligible for truncation."""
+    verbose = item.config.option.verbose
+    return verbose < 2 and not util.running_on_ci()
+
+
+def _truncate_explanation(
+    input_lines: List[str],
+    max_lines: Optional[int] = None,
+    max_chars: Optional[int] = None,
+) -> List[str]:
+    """Truncate given list of strings that makes up the assertion explanation.
+
+    Truncates to either 8 lines, or 640 characters - whichever the input reaches
+    first, taking the truncation explanation into account. The remaining lines
+    will be replaced by a usage message.
+    """
+    if max_lines is None:
+        max_lines = DEFAULT_MAX_LINES
+    if max_chars is None:
+        max_chars = DEFAULT_MAX_CHARS
+
+    # Check if truncation required
+    input_char_count = len("".join(input_lines))
+    # The length of the truncation explanation depends on the number of lines
+    # removed but is at least 68 characters:
+    # The real value is
+    # 64 (for the base message:
+    # '...\n...Full output truncated (1 line hidden), use '-vv' to show")'
+    # )
+    # + 1 (for plural)
+    # + int(math.log10(len(input_lines) - max_lines)) (number of hidden line, at least 1)
+    # + 3 for the '...' added to the truncated line
+    # But if there's more than 100 lines it's very likely that we're going to
+    # truncate, so we don't need the exact value using log10.
+    tolerable_max_chars = (
+        max_chars + 70  # 64 + 1 (for plural) + 2 (for '99') + 3 for '...'
+    )
+    # The truncation explanation add two lines to the output
+    tolerable_max_lines = max_lines + 2
+    if (
+        len(input_lines) <= tolerable_max_lines
+        and input_char_count <= tolerable_max_chars
+    ):
+        return input_lines
+    # Truncate first to max_lines, and then truncate to max_chars if necessary
+    truncated_explanation = input_lines[:max_lines]
+    truncated_char = True
+    # We reevaluate the need to truncate chars following removal of some lines
+    if len("".join(truncated_explanation)) > tolerable_max_chars:
+        truncated_explanation = _truncate_by_char_count(
+            truncated_explanation, max_chars
+        )
+    else:
+        truncated_char = False
+
+    truncated_line_count = len(input_lines) - len(truncated_explanation)
+    if truncated_explanation[-1]:
+        # Add ellipsis and take into account part-truncated final line
+        truncated_explanation[-1] = truncated_explanation[-1] + "..."
+        if truncated_char:
+            # It's possible that we did not remove any char from this line
+            truncated_line_count += 1
+    else:
+        # Add proper ellipsis when we were able to fit a full line exactly
+        truncated_explanation[-1] = "..."
+    return truncated_explanation + [
+        "",
+        f"...Full output truncated ({truncated_line_count} line"
+        f"{'' if truncated_line_count == 1 else 's'} hidden), {USAGE_MSG}",
+    ]
+
+
+def _truncate_by_char_count(input_lines: List[str], max_chars: int) -> List[str]:
+    # Find point at which input length exceeds total allowed length
+    iterated_char_count = 0
+    for iterated_index, input_line in enumerate(input_lines):
+        if iterated_char_count + len(input_line) > max_chars:
+            break
+        iterated_char_count += len(input_line)
+
+    # Create truncated explanation with modified final line
+    truncated_result = input_lines[:iterated_index]
+    final_line = input_lines[iterated_index]
+    if final_line:
+        final_line_truncate_point = max_chars - iterated_char_count
+        final_line = final_line[:final_line_truncate_point]
+    truncated_result.append(final_line)
+    return truncated_result
diff --git a/contrib/python/pytest/py3/_pytest/assertion/util.py b/contrib/python/pytest/py3/_pytest/assertion/util.py
new file mode 100644
index 0000000000..fc5dfdbd5b
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/assertion/util.py
@@ -0,0 +1,522 @@
+"""Utilities for assertion debugging."""
+import collections.abc
+import os
+import pprint
+from typing import AbstractSet
+from typing import Any
+from typing import Callable
+from typing import Iterable
+from typing import List
+from typing import Mapping
+from typing import Optional
+from typing import Sequence
+from unicodedata import normalize
+
+import _pytest._code
+from _pytest import outcomes
+from _pytest._io.saferepr import _pformat_dispatch
+from _pytest._io.saferepr import saferepr
+from _pytest._io.saferepr import saferepr_unlimited
+from _pytest.config import Config
+
+# The _reprcompare attribute on the util module is used by the new assertion
+# interpretation code and assertion rewriter to detect this plugin was
+# loaded and in turn call the hooks defined here as part of the
+# DebugInterpreter.
+_reprcompare: Optional[Callable[[str, object, object], Optional[str]]] = None
+
+# Works similarly as _reprcompare attribute. Is populated with the hook call
+# when pytest_runtest_setup is called.
+_assertion_pass: Optional[Callable[[int, str, str], None]] = None
+
+# Config object which is assigned during pytest_runtest_protocol.
+_config: Optional[Config] = None
+
+
+def format_explanation(explanation: str) -> str:
+    r"""Format an explanation.
+
+    Normally all embedded newlines are escaped, however there are
+    three exceptions: \n{, \n} and \n~.  The first two are intended
+    cover nested explanations, see function and attribute explanations
+    for examples (.visit_Call(), visit_Attribute()).  The last one is
+    for when one explanation needs to span multiple lines, e.g. when
+    displaying diffs.
+    """
+    lines = _split_explanation(explanation)
+    result = _format_lines(lines)
+    return "\n".join(result)
+
+
+def _split_explanation(explanation: str) -> List[str]:
+    r"""Return a list of individual lines in the explanation.
+
+    This will return a list of lines split on '\n{', '\n}' and '\n~'.
+    Any other newlines will be escaped and appear in the line as the
+    literal '\n' characters.
+    """
+    raw_lines = (explanation or "").split("\n")
+    lines = [raw_lines[0]]
+    for values in raw_lines[1:]:
+        if values and values[0] in ["{", "}", "~", ">"]:
+            lines.append(values)
+        else:
+            lines[-1] += "\\n" + values
+    return lines
+
+
+def _format_lines(lines: Sequence[str]) -> List[str]:
+    """Format the individual lines.
+
+    This will replace the '{', '}' and '~' characters of our mini formatting
+    language with the proper 'where ...', 'and ...' and ' + ...' text, taking
+    care of indentation along the way.
+
+    Return a list of formatted lines.
+    """
+    result = list(lines[:1])
+    stack = [0]
+    stackcnt = [0]
+    for line in lines[1:]:
+        if line.startswith("{"):
+            if stackcnt[-1]:
+                s = "and   "
+            else:
+                s = "where "
+            stack.append(len(result))
+            stackcnt[-1] += 1
+            stackcnt.append(0)
+            result.append(" +" + "  " * (len(stack) - 1) + s + line[1:])
+        elif line.startswith("}"):
+            stack.pop()
+            stackcnt.pop()
+            result[stack[-1]] += line[1:]
+        else:
+            assert line[0] in ["~", ">"]
+            stack[-1] += 1
+            indent = len(stack) if line.startswith("~") else len(stack) - 1
+            result.append("  " * indent + line[1:])
+    assert len(stack) == 1
+    return result
+
+
+def issequence(x: Any) -> bool:
+    return isinstance(x, collections.abc.Sequence) and not isinstance(x, str)
+
+
+def istext(x: Any) -> bool:
+    return isinstance(x, str)
+
+
+def isdict(x: Any) -> bool:
+    return isinstance(x, dict)
+
+
+def isset(x: Any) -> bool:
+    return isinstance(x, (set, frozenset))
+
+
+def isnamedtuple(obj: Any) -> bool:
+    return isinstance(obj, tuple) and getattr(obj, "_fields", None) is not None
+
+
+def isdatacls(obj: Any) -> bool:
+    return getattr(obj, "__dataclass_fields__", None) is not None
+
+
+def isattrs(obj: Any) -> bool:
+    return getattr(obj, "__attrs_attrs__", None) is not None
+
+
+def isiterable(obj: Any) -> bool:
+    try:
+        iter(obj)
+        return not istext(obj)
+    except TypeError:
+        return False
+
+
+def has_default_eq(
+    obj: object,
+) -> bool:
+    """Check if an instance of an object contains the default eq
+
+    First, we check if the object's __eq__ attribute has __code__,
+    if so, we check the equally of the method code filename (__code__.co_filename)
+    to the default one generated by the dataclass and attr module
+    for dataclasses the default co_filename is <string>, for attrs class, the __eq__ should contain "attrs eq generated"
+    """
+    # inspired from https://github.com/willmcgugan/rich/blob/07d51ffc1aee6f16bd2e5a25b4e82850fb9ed778/rich/pretty.py#L68
+    if hasattr(obj.__eq__, "__code__") and hasattr(obj.__eq__.__code__, "co_filename"):
+        code_filename = obj.__eq__.__code__.co_filename
+
+        if isattrs(obj):
+            return "attrs generated eq" in code_filename
+
+        return code_filename == "<string>"  # data class
+    return True
+
+
+def assertrepr_compare(
+    config, op: str, left: Any, right: Any, use_ascii: bool = False
+) -> Optional[List[str]]:
+    """Return specialised explanations for some operators/operands."""
+    verbose = config.getoption("verbose")
+
+    # Strings which normalize equal are often hard to distinguish when printed; use ascii() to make this easier.
+    # See issue #3246.
+    use_ascii = (
+        isinstance(left, str)
+        and isinstance(right, str)
+        and normalize("NFD", left) == normalize("NFD", right)
+    )
+
+    if verbose > 1:
+        left_repr = saferepr_unlimited(left, use_ascii=use_ascii)
+        right_repr = saferepr_unlimited(right, use_ascii=use_ascii)
+    else:
+        # XXX: "15 chars indentation" is wrong
+        #      ("E       AssertionError: assert "); should use term width.
+        maxsize = (
+            80 - 15 - len(op) - 2
+        ) // 2  # 15 chars indentation, 1 space around op
+
+        left_repr = saferepr(left, maxsize=maxsize, use_ascii=use_ascii)
+        right_repr = saferepr(right, maxsize=maxsize, use_ascii=use_ascii)
+
+    summary = f"{left_repr} {op} {right_repr}"
+
+    explanation = None
+    try:
+        if op == "==":
+            explanation = _compare_eq_any(left, right, verbose)
+        elif op == "not in":
+            if istext(left) and istext(right):
+                explanation = _notin_text(left, right, verbose)
+    except outcomes.Exit:
+        raise
+    except Exception:
+        explanation = [
+            "(pytest_assertion plugin: representation of details failed: {}.".format(
+                _pytest._code.ExceptionInfo.from_current()._getreprcrash()
+            ),
+            " Probably an object has a faulty __repr__.)",
+        ]
+
+    if not explanation:
+        return None
+
+    return [summary] + explanation
+
+
+def _compare_eq_any(left: Any, right: Any, verbose: int = 0) -> List[str]:
+    explanation = []
+    if istext(left) and istext(right):
+        explanation = _diff_text(left, right, verbose)
+    else:
+        from _pytest.python_api import ApproxBase
+
+        if isinstance(left, ApproxBase) or isinstance(right, ApproxBase):
+            # Although the common order should be obtained == expected, this ensures both ways
+            approx_side = left if isinstance(left, ApproxBase) else right
+            other_side = right if isinstance(left, ApproxBase) else left
+
+            explanation = approx_side._repr_compare(other_side)
+        elif type(left) == type(right) and (
+            isdatacls(left) or isattrs(left) or isnamedtuple(left)
+        ):
+            # Note: unlike dataclasses/attrs, namedtuples compare only the
+            # field values, not the type or field names. But this branch
+            # intentionally only handles the same-type case, which was often
+            # used in older code bases before dataclasses/attrs were available.
+            explanation = _compare_eq_cls(left, right, verbose)
+        elif issequence(left) and issequence(right):
+            explanation = _compare_eq_sequence(left, right, verbose)
+        elif isset(left) and isset(right):
+            explanation = _compare_eq_set(left, right, verbose)
+        elif isdict(left) and isdict(right):
+            explanation = _compare_eq_dict(left, right, verbose)
+
+        if isiterable(left) and isiterable(right):
+            expl = _compare_eq_iterable(left, right, verbose)
+            explanation.extend(expl)
+
+    return explanation
+
+
+def _diff_text(left: str, right: str, verbose: int = 0) -> List[str]:
+    """Return the explanation for the diff between text.
+
+    Unless --verbose is used this will skip leading and trailing
+    characters which are identical to keep the diff minimal.
+    """
+    from difflib import ndiff
+
+    explanation: List[str] = []
+
+    if verbose < 1:
+        i = 0  # just in case left or right has zero length
+        for i in range(min(len(left), len(right))):
+            if left[i] != right[i]:
+                break
+        if i > 42:
+            i -= 10  # Provide some context
+            explanation = [
+                "Skipping %s identical leading characters in diff, use -v to show" % i
+            ]
+            left = left[i:]
+            right = right[i:]
+        if len(left) == len(right):
+            for i in range(len(left)):
+                if left[-i] != right[-i]:
+                    break
+            if i > 42:
+                i -= 10  # Provide some context
+                explanation += [
+                    "Skipping {} identical trailing "
+                    "characters in diff, use -v to show".format(i)
+                ]
+                left = left[:-i]
+                right = right[:-i]
+    keepends = True
+    if left.isspace() or right.isspace():
+        left = repr(str(left))
+        right = repr(str(right))
+        explanation += ["Strings contain only whitespace, escaping them using repr()"]
+    # "right" is the expected base against which we compare "left",
+    # see https://github.com/pytest-dev/pytest/issues/3333
+    explanation += [
+        line.strip("\n")
+        for line in ndiff(right.splitlines(keepends), left.splitlines(keepends))
+    ]
+    return explanation
+
+
+def _surrounding_parens_on_own_lines(lines: List[str]) -> None:
+    """Move opening/closing parenthesis/bracket to own lines."""
+    opening = lines[0][:1]
+    if opening in ["(", "[", "{"]:
+        lines[0] = " " + lines[0][1:]
+        lines[:] = [opening] + lines
+    closing = lines[-1][-1:]
+    if closing in [")", "]", "}"]:
+        lines[-1] = lines[-1][:-1] + ","
+        lines[:] = lines + [closing]
+
+
+def _compare_eq_iterable(
+    left: Iterable[Any], right: Iterable[Any], verbose: int = 0
+) -> List[str]:
+    if verbose <= 0 and not running_on_ci():
+        return ["Use -v to get more diff"]
+    # dynamic import to speedup pytest
+    import difflib
+
+    left_formatting = pprint.pformat(left).splitlines()
+    right_formatting = pprint.pformat(right).splitlines()
+
+    # Re-format for different output lengths.
+    lines_left = len(left_formatting)
+    lines_right = len(right_formatting)
+    if lines_left != lines_right:
+        left_formatting = _pformat_dispatch(left).splitlines()
+        right_formatting = _pformat_dispatch(right).splitlines()
+
+    if lines_left > 1 or lines_right > 1:
+        _surrounding_parens_on_own_lines(left_formatting)
+        _surrounding_parens_on_own_lines(right_formatting)
+
+    explanation = ["Full diff:"]
+    # "right" is the expected base against which we compare "left",
+    # see https://github.com/pytest-dev/pytest/issues/3333
+    explanation.extend(
+        line.rstrip() for line in difflib.ndiff(right_formatting, left_formatting)
+    )
+    return explanation
+
+
+def _compare_eq_sequence(
+    left: Sequence[Any], right: Sequence[Any], verbose: int = 0
+) -> List[str]:
+    comparing_bytes = isinstance(left, bytes) and isinstance(right, bytes)
+    explanation: List[str] = []
+    len_left = len(left)
+    len_right = len(right)
+    for i in range(min(len_left, len_right)):
+        if left[i] != right[i]:
+            if comparing_bytes:
+                # when comparing bytes, we want to see their ascii representation
+                # instead of their numeric values (#5260)
+                # using a slice gives us the ascii representation:
+                # >>> s = b'foo'
+                # >>> s[0]
+                # 102
+                # >>> s[0:1]
+                # b'f'
+                left_value = left[i : i + 1]
+                right_value = right[i : i + 1]
+            else:
+                left_value = left[i]
+                right_value = right[i]
+
+            explanation += [f"At index {i} diff: {left_value!r} != {right_value!r}"]
+            break
+
+    if comparing_bytes:
+        # when comparing bytes, it doesn't help to show the "sides contain one or more
+        # items" longer explanation, so skip it
+
+        return explanation
+
+    len_diff = len_left - len_right
+    if len_diff:
+        if len_diff > 0:
+            dir_with_more = "Left"
+            extra = saferepr(left[len_right])
+        else:
+            len_diff = 0 - len_diff
+            dir_with_more = "Right"
+            extra = saferepr(right[len_left])
+
+        if len_diff == 1:
+            explanation += [f"{dir_with_more} contains one more item: {extra}"]
+        else:
+            explanation += [
+                "%s contains %d more items, first extra item: %s"
+                % (dir_with_more, len_diff, extra)
+            ]
+    return explanation
+
+
+def _compare_eq_set(
+    left: AbstractSet[Any], right: AbstractSet[Any], verbose: int = 0
+) -> List[str]:
+    explanation = []
+    diff_left = left - right
+    diff_right = right - left
+    if diff_left:
+        explanation.append("Extra items in the left set:")
+        for item in diff_left:
+            explanation.append(saferepr(item))
+    if diff_right:
+        explanation.append("Extra items in the right set:")
+        for item in diff_right:
+            explanation.append(saferepr(item))
+    return explanation
+
+
+def _compare_eq_dict(
+    left: Mapping[Any, Any], right: Mapping[Any, Any], verbose: int = 0
+) -> List[str]:
+    explanation: List[str] = []
+    set_left = set(left)
+    set_right = set(right)
+    common = set_left.intersection(set_right)
+    same = {k: left[k] for k in common if left[k] == right[k]}
+    if same and verbose < 2:
+        explanation += ["Omitting %s identical items, use -vv to show" % len(same)]
+    elif same:
+        explanation += ["Common items:"]
+        explanation += pprint.pformat(same).splitlines()
+    diff = {k for k in common if left[k] != right[k]}
+    if diff:
+        explanation += ["Differing items:"]
+        for k in diff:
+            explanation += [saferepr({k: left[k]}) + " != " + saferepr({k: right[k]})]
+    extra_left = set_left - set_right
+    len_extra_left = len(extra_left)
+    if len_extra_left:
+        explanation.append(
+            "Left contains %d more item%s:"
+            % (len_extra_left, "" if len_extra_left == 1 else "s")
+        )
+        explanation.extend(
+            pprint.pformat({k: left[k] for k in extra_left}).splitlines()
+        )
+    extra_right = set_right - set_left
+    len_extra_right = len(extra_right)
+    if len_extra_right:
+        explanation.append(
+            "Right contains %d more item%s:"
+            % (len_extra_right, "" if len_extra_right == 1 else "s")
+        )
+        explanation.extend(
+            pprint.pformat({k: right[k] for k in extra_right}).splitlines()
+        )
+    return explanation
+
+
+def _compare_eq_cls(left: Any, right: Any, verbose: int) -> List[str]:
+    if not has_default_eq(left):
+        return []
+    if isdatacls(left):
+        import dataclasses
+
+        all_fields = dataclasses.fields(left)
+        fields_to_check = [info.name for info in all_fields if info.compare]
+    elif isattrs(left):
+        all_fields = left.__attrs_attrs__
+        fields_to_check = [field.name for field in all_fields if getattr(field, "eq")]
+    elif isnamedtuple(left):
+        fields_to_check = left._fields
+    else:
+        assert False
+
+    indent = "  "
+    same = []
+    diff = []
+    for field in fields_to_check:
+        if getattr(left, field) == getattr(right, field):
+            same.append(field)
+        else:
+            diff.append(field)
+
+    explanation = []
+    if same or diff:
+        explanation += [""]
+    if same and verbose < 2:
+        explanation.append("Omitting %s identical items, use -vv to show" % len(same))
+    elif same:
+        explanation += ["Matching attributes:"]
+        explanation += pprint.pformat(same).splitlines()
+    if diff:
+        explanation += ["Differing attributes:"]
+        explanation += pprint.pformat(diff).splitlines()
+        for field in diff:
+            field_left = getattr(left, field)
+            field_right = getattr(right, field)
+            explanation += [
+                "",
+                "Drill down into differing attribute %s:" % field,
+                ("%s%s: %r != %r") % (indent, field, field_left, field_right),
+            ]
+            explanation += [
+                indent + line
+                for line in _compare_eq_any(field_left, field_right, verbose)
+            ]
+    return explanation
+
+
+def _notin_text(term: str, text: str, verbose: int = 0) -> List[str]:
+    index = text.find(term)
+    head = text[:index]
+    tail = text[index + len(term) :]
+    correct_text = head + tail
+    diff = _diff_text(text, correct_text, verbose)
+    newdiff = ["%s is contained here:" % saferepr(term, maxsize=42)]
+    for line in diff:
+        if line.startswith("Skipping"):
+            continue
+        if line.startswith("- "):
+            continue
+        if line.startswith("+ "):
+            newdiff.append("  " + line[2:])
+        else:
+            newdiff.append(line)
+    return newdiff
+
+
+def running_on_ci() -> bool:
+    """Check if we're currently running on a CI system."""
+    env_vars = ["CI", "BUILD_NUMBER"]
+    return any(var in os.environ for var in env_vars)
diff --git a/contrib/python/pytest/py3/_pytest/cacheprovider.py b/contrib/python/pytest/py3/_pytest/cacheprovider.py
new file mode 100644
index 0000000000..1ecb865058
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/cacheprovider.py
@@ -0,0 +1,602 @@
+"""Implementation of the cache provider."""
+# This plugin was not named "cache" to avoid conflicts with the external
+# pytest-cache version.
+import dataclasses
+import json
+import os
+from pathlib import Path
+from typing import Dict
+from typing import Generator
+from typing import Iterable
+from typing import List
+from typing import Optional
+from typing import Set
+from typing import Union
+
+from .pathlib import resolve_from_str
+from .pathlib import rm_rf
+from .reports import CollectReport
+from _pytest import nodes
+from _pytest._io import TerminalWriter
+from _pytest.compat import final
+from _pytest.config import Config
+from _pytest.config import ExitCode
+from _pytest.config import hookimpl
+from _pytest.config.argparsing import Parser
+from _pytest.deprecated import check_ispytest
+from _pytest.fixtures import fixture
+from _pytest.fixtures import FixtureRequest
+from _pytest.main import Session
+from _pytest.nodes import File
+from _pytest.python import Package
+from _pytest.reports import TestReport
+
+README_CONTENT = """\
+# pytest cache directory #
+
+This directory contains data from the pytest's cache plugin,
+which provides the `--lf` and `--ff` options, as well as the `cache` fixture.
+
+**Do not** commit this to version control.
+
+See [the docs](https://docs.pytest.org/en/stable/how-to/cache.html) for more information.
+"""
+
+CACHEDIR_TAG_CONTENT = b"""\
+Signature: 8a477f597d28d172789f06886806bc55
+# This file is a cache directory tag created by pytest.
+# For information about cache directory tags, see:
+#	https://bford.info/cachedir/spec.html
+"""
+
+
+@final
+@dataclasses.dataclass
+class Cache:
+    """Instance of the `cache` fixture."""
+
+    _cachedir: Path = dataclasses.field(repr=False)
+    _config: Config = dataclasses.field(repr=False)
+
+    # Sub-directory under cache-dir for directories created by `mkdir()`.
+    _CACHE_PREFIX_DIRS = "d"
+
+    # Sub-directory under cache-dir for values created by `set()`.
+    _CACHE_PREFIX_VALUES = "v"
+
+    def __init__(
+        self, cachedir: Path, config: Config, *, _ispytest: bool = False
+    ) -> None:
+        check_ispytest(_ispytest)
+        self._cachedir = cachedir
+        self._config = config
+
+    @classmethod
+    def for_config(cls, config: Config, *, _ispytest: bool = False) -> "Cache":
+        """Create the Cache instance for a Config.
+
+        :meta private:
+        """
+        check_ispytest(_ispytest)
+        cachedir = cls.cache_dir_from_config(config, _ispytest=True)
+        if config.getoption("cacheclear") and cachedir.is_dir():
+            cls.clear_cache(cachedir, _ispytest=True)
+        return cls(cachedir, config, _ispytest=True)
+
+    @classmethod
+    def clear_cache(cls, cachedir: Path, _ispytest: bool = False) -> None:
+        """Clear the sub-directories used to hold cached directories and values.
+
+        :meta private:
+        """
+        check_ispytest(_ispytest)
+        for prefix in (cls._CACHE_PREFIX_DIRS, cls._CACHE_PREFIX_VALUES):
+            d = cachedir / prefix
+            if d.is_dir():
+                rm_rf(d)
+
+    @staticmethod
+    def cache_dir_from_config(config: Config, *, _ispytest: bool = False) -> Path:
+        """Get the path to the cache directory for a Config.
+
+        :meta private:
+        """
+        check_ispytest(_ispytest)
+        return resolve_from_str(config.getini("cache_dir"), config.rootpath)
+
+    def warn(self, fmt: str, *, _ispytest: bool = False, **args: object) -> None:
+        """Issue a cache warning.
+
+        :meta private:
+        """
+        check_ispytest(_ispytest)
+        import warnings
+        from _pytest.warning_types import PytestCacheWarning
+
+        warnings.warn(
+            PytestCacheWarning(fmt.format(**args) if args else fmt),
+            self._config.hook,
+            stacklevel=3,
+        )
+
+    def mkdir(self, name: str) -> Path:
+        """Return a directory path object with the given name.
+
+        If the directory does not yet exist, it will be created. You can use
+        it to manage files to e.g. store/retrieve database dumps across test
+        sessions.
+
+        .. versionadded:: 7.0
+
+        :param name:
+            Must be a string not containing a ``/`` separator.
+            Make sure the name contains your plugin or application
+            identifiers to prevent clashes with other cache users.
+        """
+        path = Path(name)
+        if len(path.parts) > 1:
+            raise ValueError("name is not allowed to contain path separators")
+        res = self._cachedir.joinpath(self._CACHE_PREFIX_DIRS, path)
+        res.mkdir(exist_ok=True, parents=True)
+        return res
+
+    def _getvaluepath(self, key: str) -> Path:
+        return self._cachedir.joinpath(self._CACHE_PREFIX_VALUES, Path(key))
+
+    def get(self, key: str, default):
+        """Return the cached value for the given key.
+
+        If no value was yet cached or the value cannot be read, the specified
+        default is returned.
+
+        :param key:
+            Must be a ``/`` separated value. Usually the first
+            name is the name of your plugin or your application.
+        :param default:
+            The value to return in case of a cache-miss or invalid cache value.
+        """
+        path = self._getvaluepath(key)
+        try:
+            with path.open("r", encoding="UTF-8") as f:
+                return json.load(f)
+        except (ValueError, OSError):
+            return default
+
+    def set(self, key: str, value: object) -> None:
+        """Save value for the given key.
+
+        :param key:
+            Must be a ``/`` separated value. Usually the first
+            name is the name of your plugin or your application.
+        :param value:
+            Must be of any combination of basic python types,
+            including nested types like lists of dictionaries.
+        """
+        path = self._getvaluepath(key)
+        try:
+            if path.parent.is_dir():
+                cache_dir_exists_already = True
+            else:
+                cache_dir_exists_already = self._cachedir.exists()
+                path.parent.mkdir(exist_ok=True, parents=True)
+        except OSError as exc:
+            self.warn(
+                f"could not create cache path {path}: {exc}",
+                _ispytest=True,
+            )
+            return
+        if not cache_dir_exists_already:
+            self._ensure_supporting_files()
+        data = json.dumps(value, ensure_ascii=False, indent=2)
+        try:
+            f = path.open("w", encoding="UTF-8")
+        except OSError as exc:
+            self.warn(
+                f"cache could not write path {path}: {exc}",
+                _ispytest=True,
+            )
+        else:
+            with f:
+                f.write(data)
+
+    def _ensure_supporting_files(self) -> None:
+        """Create supporting files in the cache dir that are not really part of the cache."""
+        readme_path = self._cachedir / "README.md"
+        readme_path.write_text(README_CONTENT, encoding="UTF-8")
+
+        gitignore_path = self._cachedir.joinpath(".gitignore")
+        msg = "# Created by pytest automatically.\n*\n"
+        gitignore_path.write_text(msg, encoding="UTF-8")
+
+        cachedir_tag_path = self._cachedir.joinpath("CACHEDIR.TAG")
+        cachedir_tag_path.write_bytes(CACHEDIR_TAG_CONTENT)
+
+
+class LFPluginCollWrapper:
+    def __init__(self, lfplugin: "LFPlugin") -> None:
+        self.lfplugin = lfplugin
+        self._collected_at_least_one_failure = False
+
+    @hookimpl(hookwrapper=True)
+    def pytest_make_collect_report(self, collector: nodes.Collector):
+        if isinstance(collector, (Session, Package)):
+            out = yield
+            res: CollectReport = out.get_result()
+
+            # Sort any lf-paths to the beginning.
+            lf_paths = self.lfplugin._last_failed_paths
+
+            # Use stable sort to priorize last failed.
+            def sort_key(node: Union[nodes.Item, nodes.Collector]) -> bool:
+                # Package.path is the __init__.py file, we need the directory.
+                if isinstance(node, Package):
+                    path = node.path.parent
+                else:
+                    path = node.path
+                return path in lf_paths
+
+            res.result = sorted(
+                res.result,
+                key=sort_key,
+                reverse=True,
+            )
+            return
+
+        elif isinstance(collector, File):
+            if collector.path in self.lfplugin._last_failed_paths:
+                out = yield
+                res = out.get_result()
+                result = res.result
+                lastfailed = self.lfplugin.lastfailed
+
+                # Only filter with known failures.
+                if not self._collected_at_least_one_failure:
+                    if not any(x.nodeid in lastfailed for x in result):
+                        return
+                    self.lfplugin.config.pluginmanager.register(
+                        LFPluginCollSkipfiles(self.lfplugin), "lfplugin-collskip"
+                    )
+                    self._collected_at_least_one_failure = True
+
+                session = collector.session
+                result[:] = [
+                    x
+                    for x in result
+                    if x.nodeid in lastfailed
+                    # Include any passed arguments (not trivial to filter).
+                    or session.isinitpath(x.path)
+                    # Keep all sub-collectors.
+                    or isinstance(x, nodes.Collector)
+                ]
+                return
+        yield
+
+
+class LFPluginCollSkipfiles:
+    def __init__(self, lfplugin: "LFPlugin") -> None:
+        self.lfplugin = lfplugin
+
+    @hookimpl
+    def pytest_make_collect_report(
+        self, collector: nodes.Collector
+    ) -> Optional[CollectReport]:
+        # Packages are Files, but we only want to skip test-bearing Files,
+        # so don't filter Packages.
+        if isinstance(collector, File) and not isinstance(collector, Package):
+            if collector.path not in self.lfplugin._last_failed_paths:
+                self.lfplugin._skipped_files += 1
+
+                return CollectReport(
+                    collector.nodeid, "passed", longrepr=None, result=[]
+                )
+        return None
+
+
+class LFPlugin:
+    """Plugin which implements the --lf (run last-failing) option."""
+
+    def __init__(self, config: Config) -> None:
+        self.config = config
+        active_keys = "lf", "failedfirst"
+        self.active = any(config.getoption(key) for key in active_keys)
+        assert config.cache
+        self.lastfailed: Dict[str, bool] = config.cache.get("cache/lastfailed", {})
+        self._previously_failed_count: Optional[int] = None
+        self._report_status: Optional[str] = None
+        self._skipped_files = 0  # count skipped files during collection due to --lf
+
+        if config.getoption("lf"):
+            self._last_failed_paths = self.get_last_failed_paths()
+            config.pluginmanager.register(
+                LFPluginCollWrapper(self), "lfplugin-collwrapper"
+            )
+
+    def get_last_failed_paths(self) -> Set[Path]:
+        """Return a set with all Paths of the previously failed nodeids and
+        their parents."""
+        rootpath = self.config.rootpath
+        result = set()
+        for nodeid in self.lastfailed:
+            path = rootpath / nodeid.split("::")[0]
+            result.add(path)
+            result.update(path.parents)
+        return {x for x in result if x.exists()}
+
+    def pytest_report_collectionfinish(self) -> Optional[str]:
+        if self.active and self.config.getoption("verbose") >= 0:
+            return "run-last-failure: %s" % self._report_status
+        return None
+
+    def pytest_runtest_logreport(self, report: TestReport) -> None:
+        if (report.when == "call" and report.passed) or report.skipped:
+            self.lastfailed.pop(report.nodeid, None)
+        elif report.failed:
+            self.lastfailed[report.nodeid] = True
+
+    def pytest_collectreport(self, report: CollectReport) -> None:
+        passed = report.outcome in ("passed", "skipped")
+        if passed:
+            if report.nodeid in self.lastfailed:
+                self.lastfailed.pop(report.nodeid)
+                self.lastfailed.update((item.nodeid, True) for item in report.result)
+        else:
+            self.lastfailed[report.nodeid] = True
+
+    @hookimpl(hookwrapper=True, tryfirst=True)
+    def pytest_collection_modifyitems(
+        self, config: Config, items: List[nodes.Item]
+    ) -> Generator[None, None, None]:
+        yield
+
+        if not self.active:
+            return
+
+        if self.lastfailed:
+            previously_failed = []
+            previously_passed = []
+            for item in items:
+                if item.nodeid in self.lastfailed:
+                    previously_failed.append(item)
+                else:
+                    previously_passed.append(item)
+            self._previously_failed_count = len(previously_failed)
+
+            if not previously_failed:
+                # Running a subset of all tests with recorded failures
+                # only outside of it.
+                self._report_status = "%d known failures not in selected tests" % (
+                    len(self.lastfailed),
+                )
+            else:
+                if self.config.getoption("lf"):
+                    items[:] = previously_failed
+                    config.hook.pytest_deselected(items=previously_passed)
+                else:  # --failedfirst
+                    items[:] = previously_failed + previously_passed
+
+                noun = "failure" if self._previously_failed_count == 1 else "failures"
+                suffix = " first" if self.config.getoption("failedfirst") else ""
+                self._report_status = "rerun previous {count} {noun}{suffix}".format(
+                    count=self._previously_failed_count, suffix=suffix, noun=noun
+                )
+
+            if self._skipped_files > 0:
+                files_noun = "file" if self._skipped_files == 1 else "files"
+                self._report_status += " (skipped {files} {files_noun})".format(
+                    files=self._skipped_files, files_noun=files_noun
+                )
+        else:
+            self._report_status = "no previously failed tests, "
+            if self.config.getoption("last_failed_no_failures") == "none":
+                self._report_status += "deselecting all items."
+                config.hook.pytest_deselected(items=items[:])
+                items[:] = []
+            else:
+                self._report_status += "not deselecting items."
+
+    def pytest_sessionfinish(self, session: Session) -> None:
+        config = self.config
+        if config.getoption("cacheshow") or hasattr(config, "workerinput"):
+            return
+
+        assert config.cache is not None
+        saved_lastfailed = config.cache.get("cache/lastfailed", {})
+        if saved_lastfailed != self.lastfailed:
+            config.cache.set("cache/lastfailed", self.lastfailed)
+
+
+class NFPlugin:
+    """Plugin which implements the --nf (run new-first) option."""
+
+    def __init__(self, config: Config) -> None:
+        self.config = config
+        self.active = config.option.newfirst
+        assert config.cache is not None
+        self.cached_nodeids = set(config.cache.get("cache/nodeids", []))
+
+    @hookimpl(hookwrapper=True, tryfirst=True)
+    def pytest_collection_modifyitems(
+        self, items: List[nodes.Item]
+    ) -> Generator[None, None, None]:
+        yield
+
+        if self.active:
+            new_items: Dict[str, nodes.Item] = {}
+            other_items: Dict[str, nodes.Item] = {}
+            for item in items:
+                if item.nodeid not in self.cached_nodeids:
+                    new_items[item.nodeid] = item
+                else:
+                    other_items[item.nodeid] = item
+
+            items[:] = self._get_increasing_order(
+                new_items.values()
+            ) + self._get_increasing_order(other_items.values())
+            self.cached_nodeids.update(new_items)
+        else:
+            self.cached_nodeids.update(item.nodeid for item in items)
+
+    def _get_increasing_order(self, items: Iterable[nodes.Item]) -> List[nodes.Item]:
+        return sorted(items, key=lambda item: item.path.stat().st_mtime, reverse=True)  # type: ignore[no-any-return]
+
+    def pytest_sessionfinish(self) -> None:
+        config = self.config
+        if config.getoption("cacheshow") or hasattr(config, "workerinput"):
+            return
+
+        if config.getoption("collectonly"):
+            return
+
+        assert config.cache is not None
+        config.cache.set("cache/nodeids", sorted(self.cached_nodeids))
+
+
+def pytest_addoption(parser: Parser) -> None:
+    group = parser.getgroup("general")
+    group.addoption(
+        "--lf",
+        "--last-failed",
+        action="store_true",
+        dest="lf",
+        help="Rerun only the tests that failed "
+        "at the last run (or all if none failed)",
+    )
+    group.addoption(
+        "--ff",
+        "--failed-first",
+        action="store_true",
+        dest="failedfirst",
+        help="Run all tests, but run the last failures first. "
+        "This may re-order tests and thus lead to "
+        "repeated fixture setup/teardown.",
+    )
+    group.addoption(
+        "--nf",
+        "--new-first",
+        action="store_true",
+        dest="newfirst",
+        help="Run tests from new files first, then the rest of the tests "
+        "sorted by file mtime",
+    )
+    group.addoption(
+        "--cache-show",
+        action="append",
+        nargs="?",
+        dest="cacheshow",
+        help=(
+            "Show cache contents, don't perform collection or tests. "
+            "Optional argument: glob (default: '*')."
+        ),
+    )
+    group.addoption(
+        "--cache-clear",
+        action="store_true",
+        dest="cacheclear",
+        help="Remove all cache contents at start of test run",
+    )
+    cache_dir_default = ".pytest_cache"
+    if "TOX_ENV_DIR" in os.environ:
+        cache_dir_default = os.path.join(os.environ["TOX_ENV_DIR"], cache_dir_default)
+    parser.addini("cache_dir", default=cache_dir_default, help="Cache directory path")
+    group.addoption(
+        "--lfnf",
+        "--last-failed-no-failures",
+        action="store",
+        dest="last_failed_no_failures",
+        choices=("all", "none"),
+        default="all",
+        help="With ``--lf``, determines whether to execute tests when there "
+        "are no previously (known) failures or when no "
+        "cached ``lastfailed`` data was found. "
+        "``all`` (the default) runs the full test suite again. "
+        "``none`` just emits a message about no known failures and exits successfully.",
+    )
+
+
+def pytest_cmdline_main(config: Config) -> Optional[Union[int, ExitCode]]:
+    if config.option.cacheshow and not config.option.help:
+        from _pytest.main import wrap_session
+
+        return wrap_session(config, cacheshow)
+    return None
+
+
+@hookimpl(tryfirst=True)
+def pytest_configure(config: Config) -> None:
+    config.cache = Cache.for_config(config, _ispytest=True)
+    config.pluginmanager.register(LFPlugin(config), "lfplugin")
+    config.pluginmanager.register(NFPlugin(config), "nfplugin")
+
+
+@fixture
+def cache(request: FixtureRequest) -> Cache:
+    """Return a cache object that can persist state between testing sessions.
+
+    cache.get(key, default)
+    cache.set(key, value)
+
+    Keys must be ``/`` separated strings, where the first part is usually the
+    name of your plugin or application to avoid clashes with other cache users.
+
+    Values can be any object handled by the json stdlib module.
+    """
+    assert request.config.cache is not None
+    return request.config.cache
+
+
+def pytest_report_header(config: Config) -> Optional[str]:
+    """Display cachedir with --cache-show and if non-default."""
+    if config.option.verbose > 0 or config.getini("cache_dir") != ".pytest_cache":
+        assert config.cache is not None
+        cachedir = config.cache._cachedir
+        # TODO: evaluate generating upward relative paths
+        # starting with .., ../.. if sensible
+
+        try:
+            displaypath = cachedir.relative_to(config.rootpath)
+        except ValueError:
+            displaypath = cachedir
+        return f"cachedir: {displaypath}"
+    return None
+
+
+def cacheshow(config: Config, session: Session) -> int:
+    from pprint import pformat
+
+    assert config.cache is not None
+
+    tw = TerminalWriter()
+    tw.line("cachedir: " + str(config.cache._cachedir))
+    if not config.cache._cachedir.is_dir():
+        tw.line("cache is empty")
+        return 0
+
+    glob = config.option.cacheshow[0]
+    if glob is None:
+        glob = "*"
+
+    dummy = object()
+    basedir = config.cache._cachedir
+    vdir = basedir / Cache._CACHE_PREFIX_VALUES
+    tw.sep("-", "cache values for %r" % glob)
+    for valpath in sorted(x for x in vdir.rglob(glob) if x.is_file()):
+        key = str(valpath.relative_to(vdir))
+        val = config.cache.get(key, dummy)
+        if val is dummy:
+            tw.line("%s contains unreadable content, will be ignored" % key)
+        else:
+            tw.line("%s contains:" % key)
+            for line in pformat(val).splitlines():
+                tw.line("  " + line)
+
+    ddir = basedir / Cache._CACHE_PREFIX_DIRS
+    if ddir.is_dir():
+        contents = sorted(ddir.rglob(glob))
+        tw.sep("-", "cache directories for %r" % glob)
+        for p in contents:
+            # if p.is_dir():
+            #    print("%s/" % p.relative_to(basedir))
+            if p.is_file():
+                key = str(p.relative_to(basedir))
+                tw.line(f"{key} is a file of length {p.stat().st_size:d}")
+    return 0
diff --git a/contrib/python/pytest/py3/_pytest/capture.py b/contrib/python/pytest/py3/_pytest/capture.py
new file mode 100644
index 0000000000..a8ca0869f3
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/capture.py
@@ -0,0 +1,1082 @@
+"""Per-test stdout/stderr capturing mechanism."""
+import abc
+import collections
+import contextlib
+import io
+import os
+import sys
+from io import UnsupportedOperation
+from tempfile import TemporaryFile
+from types import TracebackType
+from typing import Any
+from typing import AnyStr
+from typing import BinaryIO
+from typing import Generator
+from typing import Generic
+from typing import Iterable
+from typing import Iterator
+from typing import List
+from typing import NamedTuple
+from typing import Optional
+from typing import TextIO
+from typing import Tuple
+from typing import Type
+from typing import TYPE_CHECKING
+from typing import Union
+
+from _pytest.compat import final
+from _pytest.config import Config
+from _pytest.config import hookimpl
+from _pytest.config.argparsing import Parser
+from _pytest.deprecated import check_ispytest
+from _pytest.fixtures import fixture
+from _pytest.fixtures import SubRequest
+from _pytest.nodes import Collector
+from _pytest.nodes import File
+from _pytest.nodes import Item
+
+if TYPE_CHECKING:
+    from typing_extensions import Final
+    from typing_extensions import Literal
+
+    _CaptureMethod = Literal["fd", "sys", "no", "tee-sys"]
+
+
+def pytest_addoption(parser: Parser) -> None:
+    group = parser.getgroup("general")
+    group._addoption(
+        "--capture",
+        action="store",
+        default="fd",
+        metavar="method",
+        choices=["fd", "sys", "no", "tee-sys"],
+        help="Per-test capturing method: one of fd|sys|no|tee-sys",
+    )
+    group._addoption(
+        "-s",
+        action="store_const",
+        const="no",
+        dest="capture",
+        help="Shortcut for --capture=no",
+    )
+
+
+def _colorama_workaround() -> None:
+    """Ensure colorama is imported so that it attaches to the correct stdio
+    handles on Windows.
+
+    colorama uses the terminal on import time. So if something does the
+    first import of colorama while I/O capture is active, colorama will
+    fail in various ways.
+    """
+    if sys.platform.startswith("win32"):
+        try:
+            import colorama  # noqa: F401
+        except ImportError:
+            pass
+
+
+def _windowsconsoleio_workaround(stream: TextIO) -> None:
+    """Workaround for Windows Unicode console handling.
+
+    Python 3.6 implemented Unicode console handling for Windows. This works
+    by reading/writing to the raw console handle using
+    ``{Read,Write}ConsoleW``.
+
+    The problem is that we are going to ``dup2`` over the stdio file
+    descriptors when doing ``FDCapture`` and this will ``CloseHandle`` the
+    handles used by Python to write to the console. Though there is still some
+    weirdness and the console handle seems to only be closed randomly and not
+    on the first call to ``CloseHandle``, or maybe it gets reopened with the
+    same handle value when we suspend capturing.
+
+    The workaround in this case will reopen stdio with a different fd which
+    also means a different handle by replicating the logic in
+    "Py_lifecycle.c:initstdio/create_stdio".
+
+    :param stream:
+        In practice ``sys.stdout`` or ``sys.stderr``, but given
+        here as parameter for unittesting purposes.
+
+    See https://github.com/pytest-dev/py/issues/103.
+    """
+    if not sys.platform.startswith("win32") or hasattr(sys, "pypy_version_info"):
+        return
+
+    # Bail out if ``stream`` doesn't seem like a proper ``io`` stream (#2666).
+    if not hasattr(stream, "buffer"):  # type: ignore[unreachable]
+        return
+
+    buffered = hasattr(stream.buffer, "raw")
+    raw_stdout = stream.buffer.raw if buffered else stream.buffer  # type: ignore[attr-defined]
+
+    if not isinstance(raw_stdout, io._WindowsConsoleIO):  # type: ignore[attr-defined]
+        return
+
+    def _reopen_stdio(f, mode):
+        if not buffered and mode[0] == "w":
+            buffering = 0
+        else:
+            buffering = -1
+
+        return io.TextIOWrapper(
+            open(os.dup(f.fileno()), mode, buffering),
+            f.encoding,
+            f.errors,
+            f.newlines,
+            f.line_buffering,
+        )
+
+    sys.stdin = _reopen_stdio(sys.stdin, "rb")
+    sys.stdout = _reopen_stdio(sys.stdout, "wb")
+    sys.stderr = _reopen_stdio(sys.stderr, "wb")
+
+
+@hookimpl(hookwrapper=True)
+def pytest_load_initial_conftests(early_config: Config):
+    ns = early_config.known_args_namespace
+    if ns.capture == "fd":
+        _windowsconsoleio_workaround(sys.stdout)
+    _colorama_workaround()
+    pluginmanager = early_config.pluginmanager
+    capman = CaptureManager(ns.capture)
+    pluginmanager.register(capman, "capturemanager")
+
+    # Make sure that capturemanager is properly reset at final shutdown.
+    early_config.add_cleanup(capman.stop_global_capturing)
+
+    # Finally trigger conftest loading but while capturing (issue #93).
+    capman.start_global_capturing()
+    outcome = yield
+    capman.suspend_global_capture()
+    if outcome.excinfo is not None:
+        out, err = capman.read_global_capture()
+        sys.stdout.write(out)
+        sys.stderr.write(err)
+
+
+# IO Helpers.
+
+
+class EncodedFile(io.TextIOWrapper):
+    __slots__ = ()
+
+    @property
+    def name(self) -> str:
+        # Ensure that file.name is a string. Workaround for a Python bug
+        # fixed in >=3.7.4: https://bugs.python.org/issue36015
+        return repr(self.buffer)
+
+    @property
+    def mode(self) -> str:
+        # TextIOWrapper doesn't expose a mode, but at least some of our
+        # tests check it.
+        return self.buffer.mode.replace("b", "")
+
+
+class CaptureIO(io.TextIOWrapper):
+    def __init__(self) -> None:
+        super().__init__(io.BytesIO(), encoding="UTF-8", newline="", write_through=True)
+
+    def getvalue(self) -> str:
+        assert isinstance(self.buffer, io.BytesIO)
+        return self.buffer.getvalue().decode("UTF-8")
+
+
+class TeeCaptureIO(CaptureIO):
+    def __init__(self, other: TextIO) -> None:
+        self._other = other
+        super().__init__()
+
+    def write(self, s: str) -> int:
+        super().write(s)
+        return self._other.write(s)
+
+
+class DontReadFromInput(TextIO):
+    @property
+    def encoding(self) -> str:
+        return sys.__stdin__.encoding
+
+    def read(self, size: int = -1) -> str:
+        raise OSError(
+            "pytest: reading from stdin while output is captured!  Consider using `-s`."
+        )
+
+    readline = read
+
+    def __next__(self) -> str:
+        return self.readline()
+
+    def readlines(self, hint: Optional[int] = -1) -> List[str]:
+        raise OSError(
+            "pytest: reading from stdin while output is captured!  Consider using `-s`."
+        )
+
+    def __iter__(self) -> Iterator[str]:
+        return self
+
+    def fileno(self) -> int:
+        raise UnsupportedOperation("redirected stdin is pseudofile, has no fileno()")
+
+    def flush(self) -> None:
+        raise UnsupportedOperation("redirected stdin is pseudofile, has no flush()")
+
+    def isatty(self) -> bool:
+        return False
+
+    def close(self) -> None:
+        pass
+
+    def readable(self) -> bool:
+        return False
+
+    def seek(self, offset: int, whence: int = 0) -> int:
+        raise UnsupportedOperation("redirected stdin is pseudofile, has no seek(int)")
+
+    def seekable(self) -> bool:
+        return False
+
+    def tell(self) -> int:
+        raise UnsupportedOperation("redirected stdin is pseudofile, has no tell()")
+
+    def truncate(self, size: Optional[int] = None) -> int:
+        raise UnsupportedOperation("cannot truncate stdin")
+
+    def write(self, data: str) -> int:
+        raise UnsupportedOperation("cannot write to stdin")
+
+    def writelines(self, lines: Iterable[str]) -> None:
+        raise UnsupportedOperation("Cannot write to stdin")
+
+    def writable(self) -> bool:
+        return False
+
+    def __enter__(self) -> "DontReadFromInput":
+        return self
+
+    def __exit__(
+        self,
+        type: Optional[Type[BaseException]],
+        value: Optional[BaseException],
+        traceback: Optional[TracebackType],
+    ) -> None:
+        pass
+
+    @property
+    def buffer(self) -> BinaryIO:
+        # The str/bytes doesn't actually matter in this type, so OK to fake.
+        return self  # type: ignore[return-value]
+
+
+# Capture classes.
+
+
+class CaptureBase(abc.ABC, Generic[AnyStr]):
+    EMPTY_BUFFER: AnyStr
+
+    @abc.abstractmethod
+    def __init__(self, fd: int) -> None:
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def start(self) -> None:
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def done(self) -> None:
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def suspend(self) -> None:
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def resume(self) -> None:
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def writeorg(self, data: AnyStr) -> None:
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def snap(self) -> AnyStr:
+        raise NotImplementedError()
+
+
+patchsysdict = {0: "stdin", 1: "stdout", 2: "stderr"}
+
+
+class NoCapture(CaptureBase[str]):
+    EMPTY_BUFFER = ""
+
+    def __init__(self, fd: int) -> None:
+        pass
+
+    def start(self) -> None:
+        pass
+
+    def done(self) -> None:
+        pass
+
+    def suspend(self) -> None:
+        pass
+
+    def resume(self) -> None:
+        pass
+
+    def snap(self) -> str:
+        return ""
+
+    def writeorg(self, data: str) -> None:
+        pass
+
+
+class SysCaptureBase(CaptureBase[AnyStr]):
+    def __init__(
+        self, fd: int, tmpfile: Optional[TextIO] = None, *, tee: bool = False
+    ) -> None:
+        name = patchsysdict[fd]
+        self._old: TextIO = getattr(sys, name)
+        self.name = name
+        if tmpfile is None:
+            if name == "stdin":
+                tmpfile = DontReadFromInput()
+            else:
+                tmpfile = CaptureIO() if not tee else TeeCaptureIO(self._old)
+        self.tmpfile = tmpfile
+        self._state = "initialized"
+
+    def repr(self, class_name: str) -> str:
+        return "<{} {} _old={} _state={!r} tmpfile={!r}>".format(
+            class_name,
+            self.name,
+            hasattr(self, "_old") and repr(self._old) or "<UNSET>",
+            self._state,
+            self.tmpfile,
+        )
+
+    def __repr__(self) -> str:
+        return "<{} {} _old={} _state={!r} tmpfile={!r}>".format(
+            self.__class__.__name__,
+            self.name,
+            hasattr(self, "_old") and repr(self._old) or "<UNSET>",
+            self._state,
+            self.tmpfile,
+        )
+
+    def _assert_state(self, op: str, states: Tuple[str, ...]) -> None:
+        assert (
+            self._state in states
+        ), "cannot {} in state {!r}: expected one of {}".format(
+            op, self._state, ", ".join(states)
+        )
+
+    def start(self) -> None:
+        self._assert_state("start", ("initialized",))
+        setattr(sys, self.name, self.tmpfile)
+        self._state = "started"
+
+    def done(self) -> None:
+        self._assert_state("done", ("initialized", "started", "suspended", "done"))
+        if self._state == "done":
+            return
+        setattr(sys, self.name, self._old)
+        del self._old
+        self.tmpfile.close()
+        self._state = "done"
+
+    def suspend(self) -> None:
+        self._assert_state("suspend", ("started", "suspended"))
+        setattr(sys, self.name, self._old)
+        self._state = "suspended"
+
+    def resume(self) -> None:
+        self._assert_state("resume", ("started", "suspended"))
+        if self._state == "started":
+            return
+        setattr(sys, self.name, self.tmpfile)
+        self._state = "started"
+
+
+class SysCaptureBinary(SysCaptureBase[bytes]):
+    EMPTY_BUFFER = b""
+
+    def snap(self) -> bytes:
+        self._assert_state("snap", ("started", "suspended"))
+        self.tmpfile.seek(0)
+        res = self.tmpfile.buffer.read()
+        self.tmpfile.seek(0)
+        self.tmpfile.truncate()
+        return res
+
+    def writeorg(self, data: bytes) -> None:
+        self._assert_state("writeorg", ("started", "suspended"))
+        self._old.flush()
+        self._old.buffer.write(data)
+        self._old.buffer.flush()
+
+
+class SysCapture(SysCaptureBase[str]):
+    EMPTY_BUFFER = ""
+
+    def snap(self) -> str:
+        self._assert_state("snap", ("started", "suspended"))
+        assert isinstance(self.tmpfile, CaptureIO)
+        res = self.tmpfile.getvalue()
+        self.tmpfile.seek(0)
+        self.tmpfile.truncate()
+        return res
+
+    def writeorg(self, data: str) -> None:
+        self._assert_state("writeorg", ("started", "suspended"))
+        self._old.write(data)
+        self._old.flush()
+
+
+class FDCaptureBase(CaptureBase[AnyStr]):
+    def __init__(self, targetfd: int) -> None:
+        self.targetfd = targetfd
+
+        try:
+            os.fstat(targetfd)
+        except OSError:
+            # FD capturing is conceptually simple -- create a temporary file,
+            # redirect the FD to it, redirect back when done. But when the
+            # target FD is invalid it throws a wrench into this lovely scheme.
+            #
+            # Tests themselves shouldn't care if the FD is valid, FD capturing
+            # should work regardless of external circumstances. So falling back
+            # to just sys capturing is not a good option.
+            #
+            # Further complications are the need to support suspend() and the
+            # possibility of FD reuse (e.g. the tmpfile getting the very same
+            # target FD). The following approach is robust, I believe.
+            self.targetfd_invalid: Optional[int] = os.open(os.devnull, os.O_RDWR)
+            os.dup2(self.targetfd_invalid, targetfd)
+        else:
+            self.targetfd_invalid = None
+        self.targetfd_save = os.dup(targetfd)
+
+        if targetfd == 0:
+            self.tmpfile = open(os.devnull, encoding="utf-8")
+            self.syscapture: CaptureBase[str] = SysCapture(targetfd)
+        else:
+            self.tmpfile = EncodedFile(
+                TemporaryFile(buffering=0),
+                encoding="utf-8",
+                errors="replace",
+                newline="",
+                write_through=True,
+            )
+            if targetfd in patchsysdict:
+                self.syscapture = SysCapture(targetfd, self.tmpfile)
+            else:
+                self.syscapture = NoCapture(targetfd)
+
+        self._state = "initialized"
+
+    def __repr__(self) -> str:
+        return "<{} {} oldfd={} _state={!r} tmpfile={!r}>".format(
+            self.__class__.__name__,
+            self.targetfd,
+            self.targetfd_save,
+            self._state,
+            self.tmpfile,
+        )
+
+    def _assert_state(self, op: str, states: Tuple[str, ...]) -> None:
+        assert (
+            self._state in states
+        ), "cannot {} in state {!r}: expected one of {}".format(
+            op, self._state, ", ".join(states)
+        )
+
+    def start(self) -> None:
+        """Start capturing on targetfd using memorized tmpfile."""
+        self._assert_state("start", ("initialized",))
+        os.dup2(self.tmpfile.fileno(), self.targetfd)
+        self.syscapture.start()
+        self._state = "started"
+
+    def done(self) -> None:
+        """Stop capturing, restore streams, return original capture file,
+        seeked to position zero."""
+        self._assert_state("done", ("initialized", "started", "suspended", "done"))
+        if self._state == "done":
+            return
+        os.dup2(self.targetfd_save, self.targetfd)
+        os.close(self.targetfd_save)
+        if self.targetfd_invalid is not None:
+            if self.targetfd_invalid != self.targetfd:
+                os.close(self.targetfd)
+            os.close(self.targetfd_invalid)
+        self.syscapture.done()
+        self.tmpfile.close()
+        self._state = "done"
+
+    def suspend(self) -> None:
+        self._assert_state("suspend", ("started", "suspended"))
+        if self._state == "suspended":
+            return
+        self.syscapture.suspend()
+        os.dup2(self.targetfd_save, self.targetfd)
+        self._state = "suspended"
+
+    def resume(self) -> None:
+        self._assert_state("resume", ("started", "suspended"))
+        if self._state == "started":
+            return
+        self.syscapture.resume()
+        os.dup2(self.tmpfile.fileno(), self.targetfd)
+        self._state = "started"
+
+
+class FDCaptureBinary(FDCaptureBase[bytes]):
+    """Capture IO to/from a given OS-level file descriptor.
+
+    snap() produces `bytes`.
+    """
+
+    EMPTY_BUFFER = b""
+
+    def snap(self) -> bytes:
+        self._assert_state("snap", ("started", "suspended"))
+        self.tmpfile.seek(0)
+        res = self.tmpfile.buffer.read()
+        self.tmpfile.seek(0)
+        self.tmpfile.truncate()
+        return res
+
+    def writeorg(self, data: bytes) -> None:
+        """Write to original file descriptor."""
+        self._assert_state("writeorg", ("started", "suspended"))
+        os.write(self.targetfd_save, data)
+
+
+class FDCapture(FDCaptureBase[str]):
+    """Capture IO to/from a given OS-level file descriptor.
+
+    snap() produces text.
+    """
+
+    EMPTY_BUFFER = ""
+
+    def snap(self) -> str:
+        self._assert_state("snap", ("started", "suspended"))
+        self.tmpfile.seek(0)
+        res = self.tmpfile.read()
+        self.tmpfile.seek(0)
+        self.tmpfile.truncate()
+        return res
+
+    def writeorg(self, data: str) -> None:
+        """Write to original file descriptor."""
+        self._assert_state("writeorg", ("started", "suspended"))
+        # XXX use encoding of original stream
+        os.write(self.targetfd_save, data.encode("utf-8"))
+
+
+# MultiCapture
+
+
+# Generic NamedTuple only supported since Python 3.11.
+if sys.version_info >= (3, 11) or TYPE_CHECKING:
+
+    @final
+    class CaptureResult(NamedTuple, Generic[AnyStr]):
+        """The result of :method:`CaptureFixture.readouterr`."""
+
+        out: AnyStr
+        err: AnyStr
+
+else:
+
+    class CaptureResult(
+        collections.namedtuple("CaptureResult", ["out", "err"]), Generic[AnyStr]
+    ):
+        """The result of :method:`CaptureFixture.readouterr`."""
+
+        __slots__ = ()
+
+
+class MultiCapture(Generic[AnyStr]):
+    _state = None
+    _in_suspended = False
+
+    def __init__(
+        self,
+        in_: Optional[CaptureBase[AnyStr]],
+        out: Optional[CaptureBase[AnyStr]],
+        err: Optional[CaptureBase[AnyStr]],
+    ) -> None:
+        self.in_: Optional[CaptureBase[AnyStr]] = in_
+        self.out: Optional[CaptureBase[AnyStr]] = out
+        self.err: Optional[CaptureBase[AnyStr]] = err
+
+    def __repr__(self) -> str:
+        return "<MultiCapture out={!r} err={!r} in_={!r} _state={!r} _in_suspended={!r}>".format(
+            self.out,
+            self.err,
+            self.in_,
+            self._state,
+            self._in_suspended,
+        )
+
+    def start_capturing(self) -> None:
+        self._state = "started"
+        if self.in_:
+            self.in_.start()
+        if self.out:
+            self.out.start()
+        if self.err:
+            self.err.start()
+
+    def pop_outerr_to_orig(self) -> Tuple[AnyStr, AnyStr]:
+        """Pop current snapshot out/err capture and flush to orig streams."""
+        out, err = self.readouterr()
+        if out:
+            assert self.out is not None
+            self.out.writeorg(out)
+        if err:
+            assert self.err is not None
+            self.err.writeorg(err)
+        return out, err
+
+    def suspend_capturing(self, in_: bool = False) -> None:
+        self._state = "suspended"
+        if self.out:
+            self.out.suspend()
+        if self.err:
+            self.err.suspend()
+        if in_ and self.in_:
+            self.in_.suspend()
+            self._in_suspended = True
+
+    def resume_capturing(self) -> None:
+        self._state = "started"
+        if self.out:
+            self.out.resume()
+        if self.err:
+            self.err.resume()
+        if self._in_suspended:
+            assert self.in_ is not None
+            self.in_.resume()
+            self._in_suspended = False
+
+    def stop_capturing(self) -> None:
+        """Stop capturing and reset capturing streams."""
+        if self._state == "stopped":
+            raise ValueError("was already stopped")
+        self._state = "stopped"
+        if self.out:
+            self.out.done()
+        if self.err:
+            self.err.done()
+        if self.in_:
+            self.in_.done()
+
+    def is_started(self) -> bool:
+        """Whether actively capturing -- not suspended or stopped."""
+        return self._state == "started"
+
+    def readouterr(self) -> CaptureResult[AnyStr]:
+        out = self.out.snap() if self.out else ""
+        err = self.err.snap() if self.err else ""
+        # TODO: This type error is real, need to fix.
+        return CaptureResult(out, err)  # type: ignore[arg-type]
+
+
+def _get_multicapture(method: "_CaptureMethod") -> MultiCapture[str]:
+    if method == "fd":
+        return MultiCapture(in_=FDCapture(0), out=FDCapture(1), err=FDCapture(2))
+    elif method == "sys":
+        return MultiCapture(in_=SysCapture(0), out=SysCapture(1), err=SysCapture(2))
+    elif method == "no":
+        return MultiCapture(in_=None, out=None, err=None)
+    elif method == "tee-sys":
+        return MultiCapture(
+            in_=None, out=SysCapture(1, tee=True), err=SysCapture(2, tee=True)
+        )
+    raise ValueError(f"unknown capturing method: {method!r}")
+
+
+# CaptureManager and CaptureFixture
+
+
+class CaptureManager:
+    """The capture plugin.
+
+    Manages that the appropriate capture method is enabled/disabled during
+    collection and each test phase (setup, call, teardown). After each of
+    those points, the captured output is obtained and attached to the
+    collection/runtest report.
+
+    There are two levels of capture:
+
+    * global: enabled by default and can be suppressed by the ``-s``
+      option. This is always enabled/disabled during collection and each test
+      phase.
+
+    * fixture: when a test function or one of its fixture depend on the
+      ``capsys`` or ``capfd`` fixtures. In this case special handling is
+      needed to ensure the fixtures take precedence over the global capture.
+    """
+
+    def __init__(self, method: "_CaptureMethod") -> None:
+        self._method: Final = method
+        self._global_capturing: Optional[MultiCapture[str]] = None
+        self._capture_fixture: Optional[CaptureFixture[Any]] = None
+
+    def __repr__(self) -> str:
+        return "<CaptureManager _method={!r} _global_capturing={!r} _capture_fixture={!r}>".format(
+            self._method, self._global_capturing, self._capture_fixture
+        )
+
+    def is_capturing(self) -> Union[str, bool]:
+        if self.is_globally_capturing():
+            return "global"
+        if self._capture_fixture:
+            return "fixture %s" % self._capture_fixture.request.fixturename
+        return False
+
+    # Global capturing control
+
+    def is_globally_capturing(self) -> bool:
+        return self._method != "no"
+
+    def start_global_capturing(self) -> None:
+        assert self._global_capturing is None
+        self._global_capturing = _get_multicapture(self._method)
+        self._global_capturing.start_capturing()
+
+    def stop_global_capturing(self) -> None:
+        if self._global_capturing is not None:
+            self._global_capturing.pop_outerr_to_orig()
+            self._global_capturing.stop_capturing()
+            self._global_capturing = None
+
+    def resume_global_capture(self) -> None:
+        # During teardown of the python process, and on rare occasions, capture
+        # attributes can be `None` while trying to resume global capture.
+        if self._global_capturing is not None:
+            self._global_capturing.resume_capturing()
+
+    def suspend_global_capture(self, in_: bool = False) -> None:
+        if self._global_capturing is not None:
+            self._global_capturing.suspend_capturing(in_=in_)
+
+    def suspend(self, in_: bool = False) -> None:
+        # Need to undo local capsys-et-al if it exists before disabling global capture.
+        self.suspend_fixture()
+        self.suspend_global_capture(in_)
+
+    def resume(self) -> None:
+        self.resume_global_capture()
+        self.resume_fixture()
+
+    def read_global_capture(self) -> CaptureResult[str]:
+        assert self._global_capturing is not None
+        return self._global_capturing.readouterr()
+
+    # Fixture Control
+
+    def set_fixture(self, capture_fixture: "CaptureFixture[Any]") -> None:
+        if self._capture_fixture:
+            current_fixture = self._capture_fixture.request.fixturename
+            requested_fixture = capture_fixture.request.fixturename
+            capture_fixture.request.raiseerror(
+                "cannot use {} and {} at the same time".format(
+                    requested_fixture, current_fixture
+                )
+            )
+        self._capture_fixture = capture_fixture
+
+    def unset_fixture(self) -> None:
+        self._capture_fixture = None
+
+    def activate_fixture(self) -> None:
+        """If the current item is using ``capsys`` or ``capfd``, activate
+        them so they take precedence over the global capture."""
+        if self._capture_fixture:
+            self._capture_fixture._start()
+
+    def deactivate_fixture(self) -> None:
+        """Deactivate the ``capsys`` or ``capfd`` fixture of this item, if any."""
+        if self._capture_fixture:
+            self._capture_fixture.close()
+
+    def suspend_fixture(self) -> None:
+        if self._capture_fixture:
+            self._capture_fixture._suspend()
+
+    def resume_fixture(self) -> None:
+        if self._capture_fixture:
+            self._capture_fixture._resume()
+
+    # Helper context managers
+
+    @contextlib.contextmanager
+    def global_and_fixture_disabled(self) -> Generator[None, None, None]:
+        """Context manager to temporarily disable global and current fixture capturing."""
+        do_fixture = self._capture_fixture and self._capture_fixture._is_started()
+        if do_fixture:
+            self.suspend_fixture()
+        do_global = self._global_capturing and self._global_capturing.is_started()
+        if do_global:
+            self.suspend_global_capture()
+        try:
+            yield
+        finally:
+            if do_global:
+                self.resume_global_capture()
+            if do_fixture:
+                self.resume_fixture()
+
+    @contextlib.contextmanager
+    def item_capture(self, when: str, item: Item) -> Generator[None, None, None]:
+        self.resume_global_capture()
+        self.activate_fixture()
+        try:
+            yield
+        finally:
+            self.deactivate_fixture()
+            self.suspend_global_capture(in_=False)
+
+        out, err = self.read_global_capture()
+        item.add_report_section(when, "stdout", out)
+        item.add_report_section(when, "stderr", err)
+
+    # Hooks
+
+    @hookimpl(hookwrapper=True)
+    def pytest_make_collect_report(self, collector: Collector):
+        if isinstance(collector, File):
+            self.resume_global_capture()
+            outcome = yield
+            self.suspend_global_capture()
+            out, err = self.read_global_capture()
+            rep = outcome.get_result()
+            if out:
+                rep.sections.append(("Captured stdout", out))
+            if err:
+                rep.sections.append(("Captured stderr", err))
+        else:
+            yield
+
+    @hookimpl(hookwrapper=True)
+    def pytest_runtest_setup(self, item: Item) -> Generator[None, None, None]:
+        with self.item_capture("setup", item):
+            yield
+
+    @hookimpl(hookwrapper=True)
+    def pytest_runtest_call(self, item: Item) -> Generator[None, None, None]:
+        with self.item_capture("call", item):
+            yield
+
+    @hookimpl(hookwrapper=True)
+    def pytest_runtest_teardown(self, item: Item) -> Generator[None, None, None]:
+        with self.item_capture("teardown", item):
+            yield
+
+    @hookimpl(tryfirst=True)
+    def pytest_keyboard_interrupt(self) -> None:
+        self.stop_global_capturing()
+
+    @hookimpl(tryfirst=True)
+    def pytest_internalerror(self) -> None:
+        self.stop_global_capturing()
+
+
+class CaptureFixture(Generic[AnyStr]):
+    """Object returned by the :fixture:`capsys`, :fixture:`capsysbinary`,
+    :fixture:`capfd` and :fixture:`capfdbinary` fixtures."""
+
+    def __init__(
+        self,
+        captureclass: Type[CaptureBase[AnyStr]],
+        request: SubRequest,
+        *,
+        _ispytest: bool = False,
+    ) -> None:
+        check_ispytest(_ispytest)
+        self.captureclass: Type[CaptureBase[AnyStr]] = captureclass
+        self.request = request
+        self._capture: Optional[MultiCapture[AnyStr]] = None
+        self._captured_out: AnyStr = self.captureclass.EMPTY_BUFFER
+        self._captured_err: AnyStr = self.captureclass.EMPTY_BUFFER
+
+    def _start(self) -> None:
+        if self._capture is None:
+            self._capture = MultiCapture(
+                in_=None,
+                out=self.captureclass(1),
+                err=self.captureclass(2),
+            )
+            self._capture.start_capturing()
+
+    def close(self) -> None:
+        if self._capture is not None:
+            out, err = self._capture.pop_outerr_to_orig()
+            self._captured_out += out
+            self._captured_err += err
+            self._capture.stop_capturing()
+            self._capture = None
+
+    def readouterr(self) -> CaptureResult[AnyStr]:
+        """Read and return the captured output so far, resetting the internal
+        buffer.
+
+        :returns:
+            The captured content as a namedtuple with ``out`` and ``err``
+            string attributes.
+        """
+        captured_out, captured_err = self._captured_out, self._captured_err
+        if self._capture is not None:
+            out, err = self._capture.readouterr()
+            captured_out += out
+            captured_err += err
+        self._captured_out = self.captureclass.EMPTY_BUFFER
+        self._captured_err = self.captureclass.EMPTY_BUFFER
+        return CaptureResult(captured_out, captured_err)
+
+    def _suspend(self) -> None:
+        """Suspend this fixture's own capturing temporarily."""
+        if self._capture is not None:
+            self._capture.suspend_capturing()
+
+    def _resume(self) -> None:
+        """Resume this fixture's own capturing temporarily."""
+        if self._capture is not None:
+            self._capture.resume_capturing()
+
+    def _is_started(self) -> bool:
+        """Whether actively capturing -- not disabled or closed."""
+        if self._capture is not None:
+            return self._capture.is_started()
+        return False
+
+    @contextlib.contextmanager
+    def disabled(self) -> Generator[None, None, None]:
+        """Temporarily disable capturing while inside the ``with`` block."""
+        capmanager: CaptureManager = self.request.config.pluginmanager.getplugin(
+            "capturemanager"
+        )
+        with capmanager.global_and_fixture_disabled():
+            yield
+
+
+# The fixtures.
+
+
+@fixture
+def capsys(request: SubRequest) -> Generator[CaptureFixture[str], None, None]:
+    r"""Enable text capturing of writes to ``sys.stdout`` and ``sys.stderr``.
+
+    The captured output is made available via ``capsys.readouterr()`` method
+    calls, which return a ``(out, err)`` namedtuple.
+    ``out`` and ``err`` will be ``text`` objects.
+
+    Returns an instance of :class:`CaptureFixture[str] <pytest.CaptureFixture>`.
+
+    Example:
+
+    .. code-block:: python
+
+        def test_output(capsys):
+            print("hello")
+            captured = capsys.readouterr()
+            assert captured.out == "hello\n"
+    """
+    capman: CaptureManager = request.config.pluginmanager.getplugin("capturemanager")
+    capture_fixture = CaptureFixture(SysCapture, request, _ispytest=True)
+    capman.set_fixture(capture_fixture)
+    capture_fixture._start()
+    yield capture_fixture
+    capture_fixture.close()
+    capman.unset_fixture()
+
+
+@fixture
+def capsysbinary(request: SubRequest) -> Generator[CaptureFixture[bytes], None, None]:
+    r"""Enable bytes capturing of writes to ``sys.stdout`` and ``sys.stderr``.
+
+    The captured output is made available via ``capsysbinary.readouterr()``
+    method calls, which return a ``(out, err)`` namedtuple.
+    ``out`` and ``err`` will be ``bytes`` objects.
+
+    Returns an instance of :class:`CaptureFixture[bytes] <pytest.CaptureFixture>`.
+
+    Example:
+
+    .. code-block:: python
+
+        def test_output(capsysbinary):
+            print("hello")
+            captured = capsysbinary.readouterr()
+            assert captured.out == b"hello\n"
+    """
+    capman: CaptureManager = request.config.pluginmanager.getplugin("capturemanager")
+    capture_fixture = CaptureFixture(SysCaptureBinary, request, _ispytest=True)
+    capman.set_fixture(capture_fixture)
+    capture_fixture._start()
+    yield capture_fixture
+    capture_fixture.close()
+    capman.unset_fixture()
+
+
+@fixture
+def capfd(request: SubRequest) -> Generator[CaptureFixture[str], None, None]:
+    r"""Enable text capturing of writes to file descriptors ``1`` and ``2``.
+
+    The captured output is made available via ``capfd.readouterr()`` method
+    calls, which return a ``(out, err)`` namedtuple.
+    ``out`` and ``err`` will be ``text`` objects.
+
+    Returns an instance of :class:`CaptureFixture[str] <pytest.CaptureFixture>`.
+
+    Example:
+
+    .. code-block:: python
+
+        def test_system_echo(capfd):
+            os.system('echo "hello"')
+            captured = capfd.readouterr()
+            assert captured.out == "hello\n"
+    """
+    capman: CaptureManager = request.config.pluginmanager.getplugin("capturemanager")
+    capture_fixture = CaptureFixture(FDCapture, request, _ispytest=True)
+    capman.set_fixture(capture_fixture)
+    capture_fixture._start()
+    yield capture_fixture
+    capture_fixture.close()
+    capman.unset_fixture()
+
+
+@fixture
+def capfdbinary(request: SubRequest) -> Generator[CaptureFixture[bytes], None, None]:
+    r"""Enable bytes capturing of writes to file descriptors ``1`` and ``2``.
+
+    The captured output is made available via ``capfd.readouterr()`` method
+    calls, which return a ``(out, err)`` namedtuple.
+    ``out`` and ``err`` will be ``byte`` objects.
+
+    Returns an instance of :class:`CaptureFixture[bytes] <pytest.CaptureFixture>`.
+
+    Example:
+
+    .. code-block:: python
+
+        def test_system_echo(capfdbinary):
+            os.system('echo "hello"')
+            captured = capfdbinary.readouterr()
+            assert captured.out == b"hello\n"
+
+    """
+    capman: CaptureManager = request.config.pluginmanager.getplugin("capturemanager")
+    capture_fixture = CaptureFixture(FDCaptureBinary, request, _ispytest=True)
+    capman.set_fixture(capture_fixture)
+    capture_fixture._start()
+    yield capture_fixture
+    capture_fixture.close()
+    capman.unset_fixture()
diff --git a/contrib/python/pytest/py3/_pytest/compat.py b/contrib/python/pytest/py3/_pytest/compat.py
new file mode 100644
index 0000000000..a1f9d37722
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/compat.py
@@ -0,0 +1,426 @@
+"""Python version compatibility code."""
+from __future__ import annotations
+
+import dataclasses
+import enum
+import functools
+import inspect
+import os
+import sys
+from inspect import Parameter
+from inspect import signature
+from pathlib import Path
+from typing import Any
+from typing import Callable
+from typing import Generic
+from typing import NoReturn
+from typing import TYPE_CHECKING
+from typing import TypeVar
+
+import _pytest._py.path as py_path
+
+# fmt: off
+# Workaround for https://github.com/sphinx-doc/sphinx/issues/10351.
+# If `overload` is imported from `compat` instead of from `typing`,
+# Sphinx doesn't recognize it as `overload` and the API docs for
+# overloaded functions look good again. But type checkers handle
+# it fine.
+# fmt: on
+if True:
+    from typing import overload as overload
+
+if TYPE_CHECKING:
+    from typing_extensions import Final
+
+
+_T = TypeVar("_T")
+_S = TypeVar("_S")
+
+#: constant to prepare valuing pylib path replacements/lazy proxies later on
+#  intended for removal in pytest 8.0 or 9.0
+
+# fmt: off
+# intentional space to create a fake difference for the verification
+LEGACY_PATH = py_path. local
+# fmt: on
+
+
+def legacy_path(path: str | os.PathLike[str]) -> LEGACY_PATH:
+    """Internal wrapper to prepare lazy proxies for legacy_path instances"""
+    return LEGACY_PATH(path)
+
+
+# fmt: off
+# Singleton type for NOTSET, as described in:
+# https://www.python.org/dev/peps/pep-0484/#support-for-singleton-types-in-unions
+class NotSetType(enum.Enum):
+    token = 0
+NOTSET: Final = NotSetType.token  # noqa: E305
+# fmt: on
+
+if sys.version_info >= (3, 8):
+    import importlib.metadata
+
+    importlib_metadata = importlib.metadata
+else:
+    import importlib_metadata as importlib_metadata  # noqa: F401
+
+
+def _format_args(func: Callable[..., Any]) -> str:
+    return str(signature(func))
+
+
+def is_generator(func: object) -> bool:
+    genfunc = inspect.isgeneratorfunction(func)
+    return genfunc and not iscoroutinefunction(func)
+
+
+def iscoroutinefunction(func: object) -> bool:
+    """Return True if func is a coroutine function (a function defined with async
+    def syntax, and doesn't contain yield), or a function decorated with
+    @asyncio.coroutine.
+
+    Note: copied and modified from Python 3.5's builtin couroutines.py to avoid
+    importing asyncio directly, which in turns also initializes the "logging"
+    module as a side-effect (see issue #8).
+    """
+    return inspect.iscoroutinefunction(func) or getattr(func, "_is_coroutine", False)
+
+
+def is_async_function(func: object) -> bool:
+    """Return True if the given function seems to be an async function or
+    an async generator."""
+    return iscoroutinefunction(func) or inspect.isasyncgenfunction(func)
+
+
+def getlocation(function, curdir: str | None = None) -> str:
+    function = get_real_func(function)
+    fn = Path(inspect.getfile(function))
+    lineno = function.__code__.co_firstlineno
+    if curdir is not None:
+        try:
+            relfn = fn.relative_to(curdir)
+        except ValueError:
+            pass
+        else:
+            return "%s:%d" % (relfn, lineno + 1)
+    return "%s:%d" % (fn, lineno + 1)
+
+
+def num_mock_patch_args(function) -> int:
+    """Return number of arguments used up by mock arguments (if any)."""
+    patchings = getattr(function, "patchings", None)
+    if not patchings:
+        return 0
+
+    mock_sentinel = getattr(sys.modules.get("mock"), "DEFAULT", object())
+    ut_mock_sentinel = getattr(sys.modules.get("unittest.mock"), "DEFAULT", object())
+
+    return len(
+        [
+            p
+            for p in patchings
+            if not p.attribute_name
+            and (p.new is mock_sentinel or p.new is ut_mock_sentinel)
+        ]
+    )
+
+
+def getfuncargnames(
+    function: Callable[..., Any],
+    *,
+    name: str = "",
+    is_method: bool = False,
+    cls: type | None = None,
+) -> tuple[str, ...]:
+    """Return the names of a function's mandatory arguments.
+
+    Should return the names of all function arguments that:
+    * Aren't bound to an instance or type as in instance or class methods.
+    * Don't have default values.
+    * Aren't bound with functools.partial.
+    * Aren't replaced with mocks.
+
+    The is_method and cls arguments indicate that the function should
+    be treated as a bound method even though it's not unless, only in
+    the case of cls, the function is a static method.
+
+    The name parameter should be the original name in which the function was collected.
+    """
+    # TODO(RonnyPfannschmidt): This function should be refactored when we
+    # revisit fixtures. The fixture mechanism should ask the node for
+    # the fixture names, and not try to obtain directly from the
+    # function object well after collection has occurred.
+
+    # The parameters attribute of a Signature object contains an
+    # ordered mapping of parameter names to Parameter instances.  This
+    # creates a tuple of the names of the parameters that don't have
+    # defaults.
+    try:
+        parameters = signature(function).parameters
+    except (ValueError, TypeError) as e:
+        from _pytest.outcomes import fail
+
+        fail(
+            f"Could not determine arguments of {function!r}: {e}",
+            pytrace=False,
+        )
+
+    arg_names = tuple(
+        p.name
+        for p in parameters.values()
+        if (
+            p.kind is Parameter.POSITIONAL_OR_KEYWORD
+            or p.kind is Parameter.KEYWORD_ONLY
+        )
+        and p.default is Parameter.empty
+    )
+    if not name:
+        name = function.__name__
+
+    # If this function should be treated as a bound method even though
+    # it's passed as an unbound method or function, remove the first
+    # parameter name.
+    if is_method or (
+        # Not using `getattr` because we don't want to resolve the staticmethod.
+        # Not using `cls.__dict__` because we want to check the entire MRO.
+        cls
+        and not isinstance(
+            inspect.getattr_static(cls, name, default=None), staticmethod
+        )
+    ):
+        arg_names = arg_names[1:]
+    # Remove any names that will be replaced with mocks.
+    if hasattr(function, "__wrapped__"):
+        arg_names = arg_names[num_mock_patch_args(function) :]
+    return arg_names
+
+
+def get_default_arg_names(function: Callable[..., Any]) -> tuple[str, ...]:
+    # Note: this code intentionally mirrors the code at the beginning of
+    # getfuncargnames, to get the arguments which were excluded from its result
+    # because they had default values.
+    return tuple(
+        p.name
+        for p in signature(function).parameters.values()
+        if p.kind in (Parameter.POSITIONAL_OR_KEYWORD, Parameter.KEYWORD_ONLY)
+        and p.default is not Parameter.empty
+    )
+
+
+_non_printable_ascii_translate_table = {
+    i: f"\\x{i:02x}" for i in range(128) if i not in range(32, 127)
+}
+_non_printable_ascii_translate_table.update(
+    {ord("\t"): "\\t", ord("\r"): "\\r", ord("\n"): "\\n"}
+)
+
+
+def _translate_non_printable(s: str) -> str:
+    return s.translate(_non_printable_ascii_translate_table)
+
+
+STRING_TYPES = bytes, str
+
+
+def _bytes_to_ascii(val: bytes) -> str:
+    return val.decode("ascii", "backslashreplace")
+
+
+def ascii_escaped(val: bytes | str) -> str:
+    r"""If val is pure ASCII, return it as an str, otherwise, escape
+    bytes objects into a sequence of escaped bytes:
+
+    b'\xc3\xb4\xc5\xd6' -> r'\xc3\xb4\xc5\xd6'
+
+    and escapes unicode objects into a sequence of escaped unicode
+    ids, e.g.:
+
+    r'4\nV\U00043efa\x0eMXWB\x1e\u3028\u15fd\xcd\U0007d944'
+
+    Note:
+       The obvious "v.decode('unicode-escape')" will return
+       valid UTF-8 unicode if it finds them in bytes, but we
+       want to return escaped bytes for any byte, even if they match
+       a UTF-8 string.
+    """
+    if isinstance(val, bytes):
+        ret = _bytes_to_ascii(val)
+    else:
+        ret = val
+    return ret
+
+
+@dataclasses.dataclass
+class _PytestWrapper:
+    """Dummy wrapper around a function object for internal use only.
+
+    Used to correctly unwrap the underlying function object when we are
+    creating fixtures, because we wrap the function object ourselves with a
+    decorator to issue warnings when the fixture function is called directly.
+    """
+
+    obj: Any
+
+
+def get_real_func(obj):
+    """Get the real function object of the (possibly) wrapped object by
+    functools.wraps or functools.partial."""
+    start_obj = obj
+    for i in range(100):
+        # __pytest_wrapped__ is set by @pytest.fixture when wrapping the fixture function
+        # to trigger a warning if it gets called directly instead of by pytest: we don't
+        # want to unwrap further than this otherwise we lose useful wrappings like @mock.patch (#3774)
+        new_obj = getattr(obj, "__pytest_wrapped__", None)
+        if isinstance(new_obj, _PytestWrapper):
+            obj = new_obj.obj
+            break
+        new_obj = getattr(obj, "__wrapped__", None)
+        if new_obj is None:
+            break
+        obj = new_obj
+    else:
+        from _pytest._io.saferepr import saferepr
+
+        raise ValueError(
+            ("could not find real function of {start}\nstopped at {current}").format(
+                start=saferepr(start_obj), current=saferepr(obj)
+            )
+        )
+    if isinstance(obj, functools.partial):
+        obj = obj.func
+    return obj
+
+
+def get_real_method(obj, holder):
+    """Attempt to obtain the real function object that might be wrapping
+    ``obj``, while at the same time returning a bound method to ``holder`` if
+    the original object was a bound method."""
+    try:
+        is_method = hasattr(obj, "__func__")
+        obj = get_real_func(obj)
+    except Exception:  # pragma: no cover
+        return obj
+    if is_method and hasattr(obj, "__get__") and callable(obj.__get__):
+        obj = obj.__get__(holder)
+    return obj
+
+
+def getimfunc(func):
+    try:
+        return func.__func__
+    except AttributeError:
+        return func
+
+
+def safe_getattr(object: Any, name: str, default: Any) -> Any:
+    """Like getattr but return default upon any Exception or any OutcomeException.
+
+    Attribute access can potentially fail for 'evil' Python objects.
+    See issue #214.
+    It catches OutcomeException because of #2490 (issue #580), new outcomes
+    are derived from BaseException instead of Exception (for more details
+    check #2707).
+    """
+    from _pytest.outcomes import TEST_OUTCOME
+
+    try:
+        return getattr(object, name, default)
+    except TEST_OUTCOME:
+        return default
+
+
+def safe_isclass(obj: object) -> bool:
+    """Ignore any exception via isinstance on Python 3."""
+    try:
+        return inspect.isclass(obj)
+    except Exception:
+        return False
+
+
+if TYPE_CHECKING:
+    if sys.version_info >= (3, 8):
+        from typing import final as final
+    else:
+        from typing_extensions import final as final
+elif sys.version_info >= (3, 8):
+    from typing import final as final
+else:
+
+    def final(f):
+        return f
+
+
+if sys.version_info >= (3, 8):
+    from functools import cached_property as cached_property
+else:
+
+    class cached_property(Generic[_S, _T]):
+        __slots__ = ("func", "__doc__")
+
+        def __init__(self, func: Callable[[_S], _T]) -> None:
+            self.func = func
+            self.__doc__ = func.__doc__
+
+        @overload
+        def __get__(
+            self, instance: None, owner: type[_S] | None = ...
+        ) -> cached_property[_S, _T]:
+            ...
+
+        @overload
+        def __get__(self, instance: _S, owner: type[_S] | None = ...) -> _T:
+            ...
+
+        def __get__(self, instance, owner=None):
+            if instance is None:
+                return self
+            value = instance.__dict__[self.func.__name__] = self.func(instance)
+            return value
+
+
+def get_user_id() -> int | None:
+    """Return the current user id, or None if we cannot get it reliably on the current platform."""
+    # win32 does not have a getuid() function.
+    # On Emscripten, getuid() is a stub that always returns 0.
+    if sys.platform in ("win32", "emscripten"):
+        return None
+    # getuid shouldn't fail, but cpython defines such a case.
+    # Let's hope for the best.
+    uid = os.getuid()
+    return uid if uid != -1 else None
+
+
+# Perform exhaustiveness checking.
+#
+# Consider this example:
+#
+#     MyUnion = Union[int, str]
+#
+#     def handle(x: MyUnion) -> int {
+#         if isinstance(x, int):
+#             return 1
+#         elif isinstance(x, str):
+#             return 2
+#         else:
+#             raise Exception('unreachable')
+#
+# Now suppose we add a new variant:
+#
+#     MyUnion = Union[int, str, bytes]
+#
+# After doing this, we must remember ourselves to go and update the handle
+# function to handle the new variant.
+#
+# With `assert_never` we can do better:
+#
+#     // raise Exception('unreachable')
+#     return assert_never(x)
+#
+# Now, if we forget to handle the new variant, the type-checker will emit a
+# compile-time error, instead of the runtime error we would have gotten
+# previously.
+#
+# This also work for Enums (if you use `is` to compare) and Literals.
+def assert_never(value: NoReturn) -> NoReturn:
+    assert False, f"Unhandled value: {value} ({type(value).__name__})"
diff --git a/contrib/python/pytest/py3/_pytest/config/__init__.py b/contrib/python/pytest/py3/_pytest/config/__init__.py
new file mode 100644
index 0000000000..e3990d175d
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/config/__init__.py
@@ -0,0 +1,1816 @@
+"""Command line options, ini-file and conftest.py processing."""
+import argparse
+import collections.abc
+import copy
+import dataclasses
+import enum
+import glob
+import inspect
+import os
+import re
+import shlex
+import sys
+import types
+import warnings
+from functools import lru_cache
+from pathlib import Path
+from textwrap import dedent
+from types import FunctionType
+from types import TracebackType
+from typing import Any
+from typing import Callable
+from typing import cast
+from typing import Dict
+from typing import Generator
+from typing import IO
+from typing import Iterable
+from typing import Iterator
+from typing import List
+from typing import Optional
+from typing import Sequence
+from typing import Set
+from typing import TextIO
+from typing import Tuple
+from typing import Type
+from typing import TYPE_CHECKING
+from typing import Union
+
+from pluggy import HookimplMarker
+from pluggy import HookspecMarker
+from pluggy import PluginManager
+
+import _pytest._code
+import _pytest.deprecated
+import _pytest.hookspec
+from .exceptions import PrintHelp as PrintHelp
+from .exceptions import UsageError as UsageError
+from .findpaths import determine_setup
+from _pytest._code import ExceptionInfo
+from _pytest._code import filter_traceback
+from _pytest._io import TerminalWriter
+from _pytest.compat import final
+from _pytest.compat import importlib_metadata  # type: ignore[attr-defined]
+from _pytest.outcomes import fail
+from _pytest.outcomes import Skipped
+from _pytest.pathlib import absolutepath
+from _pytest.pathlib import bestrelpath
+from _pytest.pathlib import import_path
+from _pytest.pathlib import ImportMode
+from _pytest.pathlib import resolve_package_path
+from _pytest.pathlib import safe_exists
+from _pytest.stash import Stash
+from _pytest.warning_types import PytestConfigWarning
+from _pytest.warning_types import warn_explicit_for
+
+if TYPE_CHECKING:
+    from _pytest._code.code import _TracebackStyle
+    from _pytest.terminal import TerminalReporter
+    from .argparsing import Argument
+
+
+_PluggyPlugin = object
+"""A type to represent plugin objects.
+
+Plugins can be any namespace, so we can't narrow it down much, but we use an
+alias to make the intent clear.
+
+Ideally this type would be provided by pluggy itself.
+"""
+
+
+hookimpl = HookimplMarker("pytest")
+hookspec = HookspecMarker("pytest")
+
+
+@final
+class ExitCode(enum.IntEnum):
+    """Encodes the valid exit codes by pytest.
+
+    Currently users and plugins may supply other exit codes as well.
+
+    .. versionadded:: 5.0
+    """
+
+    #: Tests passed.
+    OK = 0
+    #: Tests failed.
+    TESTS_FAILED = 1
+    #: pytest was interrupted.
+    INTERRUPTED = 2
+    #: An internal error got in the way.
+    INTERNAL_ERROR = 3
+    #: pytest was misused.
+    USAGE_ERROR = 4
+    #: pytest couldn't find tests.
+    NO_TESTS_COLLECTED = 5
+
+
+class ConftestImportFailure(Exception):
+    def __init__(
+        self,
+        path: Path,
+        excinfo: Tuple[Type[Exception], Exception, TracebackType],
+    ) -> None:
+        super().__init__(path, excinfo)
+        self.path = path
+        self.excinfo = excinfo
+
+    def __str__(self) -> str:
+        return "{}: {} (from {})".format(
+            self.excinfo[0].__name__, self.excinfo[1], self.path
+        )
+
+
+def filter_traceback_for_conftest_import_failure(
+    entry: _pytest._code.TracebackEntry,
+) -> bool:
+    """Filter tracebacks entries which point to pytest internals or importlib.
+
+    Make a special case for importlib because we use it to import test modules and conftest files
+    in _pytest.pathlib.import_path.
+    """
+    return filter_traceback(entry) and "importlib" not in str(entry.path).split(os.sep)
+
+
+def main(
+    args: Optional[Union[List[str], "os.PathLike[str]"]] = None,
+    plugins: Optional[Sequence[Union[str, _PluggyPlugin]]] = None,
+) -> Union[int, ExitCode]:
+    """Perform an in-process test run.
+
+    :param args:
+        List of command line arguments. If `None` or not given, defaults to reading
+        arguments directly from the process command line (:data:`sys.argv`).
+    :param plugins: List of plugin objects to be auto-registered during initialization.
+
+    :returns: An exit code.
+    """
+    try:
+        try:
+            config = _prepareconfig(args, plugins)
+        except ConftestImportFailure as e:
+            exc_info = ExceptionInfo.from_exc_info(e.excinfo)
+            tw = TerminalWriter(sys.stderr)
+            tw.line(f"ImportError while loading conftest '{e.path}'.", red=True)
+            exc_info.traceback = exc_info.traceback.filter(
+                filter_traceback_for_conftest_import_failure
+            )
+            exc_repr = (
+                exc_info.getrepr(style="short", chain=False)
+                if exc_info.traceback
+                else exc_info.exconly()
+            )
+            formatted_tb = str(exc_repr)
+            for line in formatted_tb.splitlines():
+                tw.line(line.rstrip(), red=True)
+            return ExitCode.USAGE_ERROR
+        else:
+            try:
+                ret: Union[ExitCode, int] = config.hook.pytest_cmdline_main(
+                    config=config
+                )
+                try:
+                    return ExitCode(ret)
+                except ValueError:
+                    return ret
+            finally:
+                config._ensure_unconfigure()
+    except UsageError as e:
+        tw = TerminalWriter(sys.stderr)
+        for msg in e.args:
+            tw.line(f"ERROR: {msg}\n", red=True)
+        return ExitCode.USAGE_ERROR
+
+
+def console_main() -> int:
+    """The CLI entry point of pytest.
+
+    This function is not meant for programmable use; use `main()` instead.
+    """
+    # https://docs.python.org/3/library/signal.html#note-on-sigpipe
+    try:
+        code = main()
+        sys.stdout.flush()
+        return code
+    except BrokenPipeError:
+        # Python flushes standard streams on exit; redirect remaining output
+        # to devnull to avoid another BrokenPipeError at shutdown
+        devnull = os.open(os.devnull, os.O_WRONLY)
+        os.dup2(devnull, sys.stdout.fileno())
+        return 1  # Python exits with error code 1 on EPIPE
+
+
+class cmdline:  # compatibility namespace
+    main = staticmethod(main)
+
+
+def filename_arg(path: str, optname: str) -> str:
+    """Argparse type validator for filename arguments.
+
+    :path: Path of filename.
+    :optname: Name of the option.
+    """
+    if os.path.isdir(path):
+        raise UsageError(f"{optname} must be a filename, given: {path}")
+    return path
+
+
+def directory_arg(path: str, optname: str) -> str:
+    """Argparse type validator for directory arguments.
+
+    :path: Path of directory.
+    :optname: Name of the option.
+    """
+    if not os.path.isdir(path):
+        raise UsageError(f"{optname} must be a directory, given: {path}")
+    return path
+
+
+# Plugins that cannot be disabled via "-p no:X" currently.
+essential_plugins = (
+    "mark",
+    "main",
+    "runner",
+    "fixtures",
+    "helpconfig",  # Provides -p.
+)
+
+default_plugins = essential_plugins + (
+    "python",
+    "terminal",
+    "debugging",
+    "unittest",
+    "capture",
+    "skipping",
+    "legacypath",
+    "tmpdir",
+    "monkeypatch",
+    "recwarn",
+    "pastebin",
+    "nose",
+    "assertion",
+    "junitxml",
+    "doctest",
+    "cacheprovider",
+    "freeze_support",
+    "setuponly",
+    "setupplan",
+    "stepwise",
+    "warnings",
+    "logging",
+    "reports",
+    "python_path",
+    *(["unraisableexception", "threadexception"] if sys.version_info >= (3, 8) else []),
+    "faulthandler",
+)
+
+builtin_plugins = set(default_plugins)
+builtin_plugins.add("pytester")
+builtin_plugins.add("pytester_assertions")
+
+
+def get_config(
+    args: Optional[List[str]] = None,
+    plugins: Optional[Sequence[Union[str, _PluggyPlugin]]] = None,
+) -> "Config":
+    # subsequent calls to main will create a fresh instance
+    pluginmanager = PytestPluginManager()
+    config = Config(
+        pluginmanager,
+        invocation_params=Config.InvocationParams(
+            args=args or (),
+            plugins=plugins,
+            dir=Path.cwd(),
+        ),
+    )
+
+    if args is not None:
+        # Handle any "-p no:plugin" args.
+        pluginmanager.consider_preparse(args, exclude_only=True)
+
+    for spec in default_plugins:
+        pluginmanager.import_plugin(spec)
+
+    return config
+
+
+def get_plugin_manager() -> "PytestPluginManager":
+    """Obtain a new instance of the
+    :py:class:`pytest.PytestPluginManager`, with default plugins
+    already loaded.
+
+    This function can be used by integration with other tools, like hooking
+    into pytest to run tests into an IDE.
+    """
+    return get_config().pluginmanager
+
+
+def _prepareconfig(
+    args: Optional[Union[List[str], "os.PathLike[str]"]] = None,
+    plugins: Optional[Sequence[Union[str, _PluggyPlugin]]] = None,
+) -> "Config":
+    if args is None:
+        args = sys.argv[1:]
+    elif isinstance(args, os.PathLike):
+        args = [os.fspath(args)]
+    elif not isinstance(args, list):
+        msg = (  # type:ignore[unreachable]
+            "`args` parameter expected to be a list of strings, got: {!r} (type: {})"
+        )
+        raise TypeError(msg.format(args, type(args)))
+
+    config = get_config(args, plugins)
+    pluginmanager = config.pluginmanager
+    try:
+        if plugins:
+            for plugin in plugins:
+                if isinstance(plugin, str):
+                    pluginmanager.consider_pluginarg(plugin)
+                else:
+                    pluginmanager.register(plugin)
+        config = pluginmanager.hook.pytest_cmdline_parse(
+            pluginmanager=pluginmanager, args=args
+        )
+        return config
+    except BaseException:
+        config._ensure_unconfigure()
+        raise
+
+
+def _get_directory(path: Path) -> Path:
+    """Get the directory of a path - itself if already a directory."""
+    if path.is_file():
+        return path.parent
+    else:
+        return path
+
+
+def _get_legacy_hook_marks(
+    method: Any,
+    hook_type: str,
+    opt_names: Tuple[str, ...],
+) -> Dict[str, bool]:
+    if TYPE_CHECKING:
+        # abuse typeguard from importlib to avoid massive method type union thats lacking a alias
+        assert inspect.isroutine(method)
+    known_marks: set[str] = {m.name for m in getattr(method, "pytestmark", [])}
+    must_warn: list[str] = []
+    opts: dict[str, bool] = {}
+    for opt_name in opt_names:
+        opt_attr = getattr(method, opt_name, AttributeError)
+        if opt_attr is not AttributeError:
+            must_warn.append(f"{opt_name}={opt_attr}")
+            opts[opt_name] = True
+        elif opt_name in known_marks:
+            must_warn.append(f"{opt_name}=True")
+            opts[opt_name] = True
+        else:
+            opts[opt_name] = False
+    if must_warn:
+        hook_opts = ", ".join(must_warn)
+        message = _pytest.deprecated.HOOK_LEGACY_MARKING.format(
+            type=hook_type,
+            fullname=method.__qualname__,
+            hook_opts=hook_opts,
+        )
+        warn_explicit_for(cast(FunctionType, method), message)
+    return opts
+
+
+@final
+class PytestPluginManager(PluginManager):
+    """A :py:class:`pluggy.PluginManager <pluggy.PluginManager>` with
+    additional pytest-specific functionality:
+
+    * Loading plugins from the command line, ``PYTEST_PLUGINS`` env variable and
+      ``pytest_plugins`` global variables found in plugins being loaded.
+    * ``conftest.py`` loading during start-up.
+    """
+
+    def __init__(self) -> None:
+        import _pytest.assertion
+
+        super().__init__("pytest")
+
+        # -- State related to local conftest plugins.
+        # All loaded conftest modules.
+        self._conftest_plugins: Set[types.ModuleType] = set()
+        # All conftest modules applicable for a directory.
+        # This includes the directory's own conftest modules as well
+        # as those of its parent directories.
+        self._dirpath2confmods: Dict[Path, List[types.ModuleType]] = {}
+        # Cutoff directory above which conftests are no longer discovered.
+        self._confcutdir: Optional[Path] = None
+        # If set, conftest loading is skipped.
+        self._noconftest = False
+
+        # _getconftestmodules()'s call to _get_directory() causes a stat
+        # storm when it's called potentially thousands of times in a test
+        # session (#9478), often with the same path, so cache it.
+        self._get_directory = lru_cache(256)(_get_directory)
+
+        self._duplicatepaths: Set[Path] = set()
+
+        # plugins that were explicitly skipped with pytest.skip
+        # list of (module name, skip reason)
+        # previously we would issue a warning when a plugin was skipped, but
+        # since we refactored warnings as first citizens of Config, they are
+        # just stored here to be used later.
+        self.skipped_plugins: List[Tuple[str, str]] = []
+
+        self.add_hookspecs(_pytest.hookspec)
+        self.register(self)
+        if os.environ.get("PYTEST_DEBUG"):
+            err: IO[str] = sys.stderr
+            encoding: str = getattr(err, "encoding", "utf8")
+            try:
+                err = open(
+                    os.dup(err.fileno()),
+                    mode=err.mode,
+                    buffering=1,
+                    encoding=encoding,
+                )
+            except Exception:
+                pass
+            self.trace.root.setwriter(err.write)
+            self.enable_tracing()
+
+        # Config._consider_importhook will set a real object if required.
+        self.rewrite_hook = _pytest.assertion.DummyRewriteHook()
+        # Used to know when we are importing conftests after the pytest_configure stage.
+        self._configured = False
+
+    def parse_hookimpl_opts(self, plugin: _PluggyPlugin, name: str):
+        # pytest hooks are always prefixed with "pytest_",
+        # so we avoid accessing possibly non-readable attributes
+        # (see issue #1073).
+        if not name.startswith("pytest_"):
+            return None
+        # Ignore names which can not be hooks.
+        if name == "pytest_plugins":
+            return None
+
+        opts = super().parse_hookimpl_opts(plugin, name)
+        if opts is not None:
+            return opts
+
+        method = getattr(plugin, name)
+        # Consider only actual functions for hooks (#3775).
+        if not inspect.isroutine(method):
+            return None
+        # Collect unmarked hooks as long as they have the `pytest_' prefix.
+        return _get_legacy_hook_marks(  # type: ignore[return-value]
+            method, "impl", ("tryfirst", "trylast", "optionalhook", "hookwrapper")
+        )
+
+    def parse_hookspec_opts(self, module_or_class, name: str):
+        opts = super().parse_hookspec_opts(module_or_class, name)
+        if opts is None:
+            method = getattr(module_or_class, name)
+            if name.startswith("pytest_"):
+                opts = _get_legacy_hook_marks(  # type: ignore[assignment]
+                    method,
+                    "spec",
+                    ("firstresult", "historic"),
+                )
+        return opts
+
+    def register(
+        self, plugin: _PluggyPlugin, name: Optional[str] = None
+    ) -> Optional[str]:
+        if name in _pytest.deprecated.DEPRECATED_EXTERNAL_PLUGINS:
+            warnings.warn(
+                PytestConfigWarning(
+                    "{} plugin has been merged into the core, "
+                    "please remove it from your requirements.".format(
+                        name.replace("_", "-")
+                    )
+                )
+            )
+            return None
+        ret: Optional[str] = super().register(plugin, name)
+        if ret:
+            self.hook.pytest_plugin_registered.call_historic(
+                kwargs=dict(plugin=plugin, manager=self)
+            )
+
+            if isinstance(plugin, types.ModuleType):
+                self.consider_module(plugin)
+        return ret
+
+    def getplugin(self, name: str):
+        # Support deprecated naming because plugins (xdist e.g.) use it.
+        plugin: Optional[_PluggyPlugin] = self.get_plugin(name)
+        return plugin
+
+    def hasplugin(self, name: str) -> bool:
+        """Return whether a plugin with the given name is registered."""
+        return bool(self.get_plugin(name))
+
+    def pytest_configure(self, config: "Config") -> None:
+        """:meta private:"""
+        # XXX now that the pluginmanager exposes hookimpl(tryfirst...)
+        # we should remove tryfirst/trylast as markers.
+        config.addinivalue_line(
+            "markers",
+            "tryfirst: mark a hook implementation function such that the "
+            "plugin machinery will try to call it first/as early as possible. "
+            "DEPRECATED, use @pytest.hookimpl(tryfirst=True) instead.",
+        )
+        config.addinivalue_line(
+            "markers",
+            "trylast: mark a hook implementation function such that the "
+            "plugin machinery will try to call it last/as late as possible. "
+            "DEPRECATED, use @pytest.hookimpl(trylast=True) instead.",
+        )
+        self._configured = True
+
+    #
+    # Internal API for local conftest plugin handling.
+    #
+    def _set_initial_conftests(
+        self,
+        args: Sequence[Union[str, Path]],
+        pyargs: bool,
+        noconftest: bool,
+        rootpath: Path,
+        confcutdir: Optional[Path],
+        importmode: Union[ImportMode, str],
+    ) -> None:
+        """Load initial conftest files given a preparsed "namespace".
+
+        As conftest files may add their own command line options which have
+        arguments ('--my-opt somepath') we might get some false positives.
+        All builtin and 3rd party plugins will have been loaded, however, so
+        common options will not confuse our logic here.
+        """
+        current = Path.cwd()
+        self._confcutdir = absolutepath(current / confcutdir) if confcutdir else None
+        self._noconftest = noconftest
+        self._using_pyargs = pyargs
+        foundanchor = False
+        for intitial_path in args:
+            path = str(intitial_path)
+            # remove node-id syntax
+            i = path.find("::")
+            if i != -1:
+                path = path[:i]
+            anchor = absolutepath(current / path)
+
+            # Ensure we do not break if what appears to be an anchor
+            # is in fact a very long option (#10169, #11394).
+            if safe_exists(anchor):
+                self._try_load_conftest(anchor, importmode, rootpath)
+                foundanchor = True
+        if not foundanchor:
+            self._try_load_conftest(current, importmode, rootpath)
+
+    def _is_in_confcutdir(self, path: Path) -> bool:
+        """Whether a path is within the confcutdir.
+
+        When false, should not load conftest.
+        """
+        if self._confcutdir is None:
+            return True
+        return path not in self._confcutdir.parents
+
+    def _try_load_conftest(
+        self, anchor: Path, importmode: Union[str, ImportMode], rootpath: Path
+    ) -> None:
+        self._getconftestmodules(anchor, importmode, rootpath)
+        # let's also consider test* subdirs
+        if anchor.is_dir():
+            for x in anchor.glob("test*"):
+                if x.is_dir():
+                    self._getconftestmodules(x, importmode, rootpath)
+
+    def _getconftestmodules(
+        self, path: Path, importmode: Union[str, ImportMode], rootpath: Path
+    ) -> Sequence[types.ModuleType]:
+        if self._noconftest:
+            return []
+
+        directory = self._get_directory(path)
+
+        # Optimization: avoid repeated searches in the same directory.
+        # Assumes always called with same importmode and rootpath.
+        existing_clist = self._dirpath2confmods.get(directory)
+        if existing_clist is not None:
+            return existing_clist
+
+        # XXX these days we may rather want to use config.rootpath
+        # and allow users to opt into looking into the rootdir parent
+        # directories instead of requiring to specify confcutdir.
+        clist = []
+        for parent in reversed((directory, *directory.parents)):
+            if self._is_in_confcutdir(parent):
+                conftestpath = parent / "conftest.py"
+                if conftestpath.is_file():
+                    mod = self._importconftest(conftestpath, importmode, rootpath)
+                    clist.append(mod)
+        self._dirpath2confmods[directory] = clist
+        return clist
+
+    def _rget_with_confmod(
+        self,
+        name: str,
+        path: Path,
+        importmode: Union[str, ImportMode],
+        rootpath: Path,
+    ) -> Tuple[types.ModuleType, Any]:
+        modules = self._getconftestmodules(path, importmode, rootpath=rootpath)
+        for mod in reversed(modules):
+            try:
+                return mod, getattr(mod, name)
+            except AttributeError:
+                continue
+        raise KeyError(name)
+
+    def _importconftest(
+        self, conftestpath: Path, importmode: Union[str, ImportMode], rootpath: Path
+    ) -> types.ModuleType:
+        existing = self.get_plugin(str(conftestpath))
+        if existing is not None:
+            return cast(types.ModuleType, existing)
+
+        pkgpath = resolve_package_path(conftestpath)
+        if pkgpath is None:
+            _ensure_removed_sysmodule(conftestpath.stem)
+
+        try:
+            mod = import_path(conftestpath, mode=importmode, root=rootpath)
+        except Exception as e:
+            assert e.__traceback__ is not None
+            exc_info = (type(e), e, e.__traceback__)
+            raise ConftestImportFailure(conftestpath, exc_info) from e
+
+        self._check_non_top_pytest_plugins(mod, conftestpath)
+
+        self._conftest_plugins.add(mod)
+        dirpath = conftestpath.parent
+        if dirpath in self._dirpath2confmods:
+            for path, mods in self._dirpath2confmods.items():
+                if dirpath in path.parents or path == dirpath:
+                    assert mod not in mods
+                    mods.append(mod)
+        self.trace(f"loading conftestmodule {mod!r}")
+        self.consider_conftest(mod)
+        return mod
+
+    def _check_non_top_pytest_plugins(
+        self,
+        mod: types.ModuleType,
+        conftestpath: Path,
+    ) -> None:
+        if (
+            hasattr(mod, "pytest_plugins")
+            and self._configured
+            and not self._using_pyargs
+        ):
+            msg = (
+                "Defining 'pytest_plugins' in a non-top-level conftest is no longer supported:\n"
+                "It affects the entire test suite instead of just below the conftest as expected.\n"
+                "  {}\n"
+                "Please move it to a top level conftest file at the rootdir:\n"
+                "  {}\n"
+                "For more information, visit:\n"
+                "  https://docs.pytest.org/en/stable/deprecations.html#pytest-plugins-in-non-top-level-conftest-files"
+            )
+            fail(msg.format(conftestpath, self._confcutdir), pytrace=False)
+
+    #
+    # API for bootstrapping plugin loading
+    #
+    #
+
+    def consider_preparse(
+        self, args: Sequence[str], *, exclude_only: bool = False
+    ) -> None:
+        """:meta private:"""
+        i = 0
+        n = len(args)
+        while i < n:
+            opt = args[i]
+            i += 1
+            if isinstance(opt, str):
+                if opt == "-p":
+                    try:
+                        parg = args[i]
+                    except IndexError:
+                        return
+                    i += 1
+                elif opt.startswith("-p"):
+                    parg = opt[2:]
+                else:
+                    continue
+                parg = parg.strip()
+                if exclude_only and not parg.startswith("no:"):
+                    continue
+                self.consider_pluginarg(parg)
+
+    def consider_pluginarg(self, arg: str) -> None:
+        """:meta private:"""
+        if arg.startswith("no:"):
+            name = arg[3:]
+            if name in essential_plugins:
+                raise UsageError("plugin %s cannot be disabled" % name)
+
+            # PR #4304: remove stepwise if cacheprovider is blocked.
+            if name == "cacheprovider":
+                self.set_blocked("stepwise")
+                self.set_blocked("pytest_stepwise")
+
+            self.set_blocked(name)
+            if not name.startswith("pytest_"):
+                self.set_blocked("pytest_" + name)
+        else:
+            name = arg
+            # Unblock the plugin.  None indicates that it has been blocked.
+            # There is no interface with pluggy for this.
+            if self._name2plugin.get(name, -1) is None:
+                del self._name2plugin[name]
+            if not name.startswith("pytest_"):
+                if self._name2plugin.get("pytest_" + name, -1) is None:
+                    del self._name2plugin["pytest_" + name]
+            self.import_plugin(arg, consider_entry_points=True)
+
+    def consider_conftest(self, conftestmodule: types.ModuleType) -> None:
+        """:meta private:"""
+        self.register(conftestmodule, name=conftestmodule.__file__)
+
+    def consider_env(self) -> None:
+        """:meta private:"""
+        self._import_plugin_specs(os.environ.get("PYTEST_PLUGINS"))
+
+    def consider_module(self, mod: types.ModuleType) -> None:
+        """:meta private:"""
+        self._import_plugin_specs(getattr(mod, "pytest_plugins", []))
+
+    def _import_plugin_specs(
+        self, spec: Union[None, types.ModuleType, str, Sequence[str]]
+    ) -> None:
+        plugins = _get_plugin_specs_as_list(spec)
+        for import_spec in plugins:
+            self.import_plugin(import_spec)
+
+    def import_plugin(self, modname: str, consider_entry_points: bool = False) -> None:
+        """Import a plugin with ``modname``.
+
+        If ``consider_entry_points`` is True, entry point names are also
+        considered to find a plugin.
+        """
+        # Most often modname refers to builtin modules, e.g. "pytester",
+        # "terminal" or "capture".  Those plugins are registered under their
+        # basename for historic purposes but must be imported with the
+        # _pytest prefix.
+        assert isinstance(modname, str), (
+            "module name as text required, got %r" % modname
+        )
+        if self.is_blocked(modname) or self.get_plugin(modname) is not None:
+            return
+
+        importspec = "_pytest." + modname if modname in builtin_plugins else modname
+        self.rewrite_hook.mark_rewrite(importspec)
+
+        if consider_entry_points:
+            loaded = self.load_setuptools_entrypoints("pytest11", name=modname)
+            if loaded:
+                return
+
+        try:
+            __import__(importspec)
+        except ImportError as e:
+            raise ImportError(
+                f'Error importing plugin "{modname}": {e.args[0]}'
+            ).with_traceback(e.__traceback__) from e
+
+        except Skipped as e:
+            self.skipped_plugins.append((modname, e.msg or ""))
+        else:
+            mod = sys.modules[importspec]
+            self.register(mod, modname)
+
+
+def _get_plugin_specs_as_list(
+    specs: Union[None, types.ModuleType, str, Sequence[str]]
+) -> List[str]:
+    """Parse a plugins specification into a list of plugin names."""
+    # None means empty.
+    if specs is None:
+        return []
+    # Workaround for #3899 - a submodule which happens to be called "pytest_plugins".
+    if isinstance(specs, types.ModuleType):
+        return []
+    # Comma-separated list.
+    if isinstance(specs, str):
+        return specs.split(",") if specs else []
+    # Direct specification.
+    if isinstance(specs, collections.abc.Sequence):
+        return list(specs)
+    raise UsageError(
+        "Plugins may be specified as a sequence or a ','-separated string of plugin names. Got: %r"
+        % specs
+    )
+
+
+def _ensure_removed_sysmodule(modname: str) -> None:
+    try:
+        del sys.modules[modname]
+    except KeyError:
+        pass
+
+
+class Notset:
+    def __repr__(self):
+        return "<NOTSET>"
+
+
+notset = Notset()
+
+
+def _iter_rewritable_modules(package_files: Iterable[str]) -> Iterator[str]:
+    """Given an iterable of file names in a source distribution, return the "names" that should
+    be marked for assertion rewrite.
+
+    For example the package "pytest_mock/__init__.py" should be added as "pytest_mock" in
+    the assertion rewrite mechanism.
+
+    This function has to deal with dist-info based distributions and egg based distributions
+    (which are still very much in use for "editable" installs).
+
+    Here are the file names as seen in a dist-info based distribution:
+
+        pytest_mock/__init__.py
+        pytest_mock/_version.py
+        pytest_mock/plugin.py
+        pytest_mock.egg-info/PKG-INFO
+
+    Here are the file names as seen in an egg based distribution:
+
+        src/pytest_mock/__init__.py
+        src/pytest_mock/_version.py
+        src/pytest_mock/plugin.py
+        src/pytest_mock.egg-info/PKG-INFO
+        LICENSE
+        setup.py
+
+    We have to take in account those two distribution flavors in order to determine which
+    names should be considered for assertion rewriting.
+
+    More information:
+        https://github.com/pytest-dev/pytest-mock/issues/167
+    """
+    package_files = list(package_files)
+    seen_some = False
+    for fn in package_files:
+        is_simple_module = "/" not in fn and fn.endswith(".py")
+        is_package = fn.count("/") == 1 and fn.endswith("__init__.py")
+        if is_simple_module:
+            module_name, _ = os.path.splitext(fn)
+            # we ignore "setup.py" at the root of the distribution
+            # as well as editable installation finder modules made by setuptools
+            if module_name != "setup" and not module_name.startswith("__editable__"):
+                seen_some = True
+                yield module_name
+        elif is_package:
+            package_name = os.path.dirname(fn)
+            seen_some = True
+            yield package_name
+
+    if not seen_some:
+        # At this point we did not find any packages or modules suitable for assertion
+        # rewriting, so we try again by stripping the first path component (to account for
+        # "src" based source trees for example).
+        # This approach lets us have the common case continue to be fast, as egg-distributions
+        # are rarer.
+        new_package_files = []
+        for fn in package_files:
+            parts = fn.split("/")
+            new_fn = "/".join(parts[1:])
+            if new_fn:
+                new_package_files.append(new_fn)
+        if new_package_files:
+            yield from _iter_rewritable_modules(new_package_files)
+
+
+@final
+class Config:
+    """Access to configuration values, pluginmanager and plugin hooks.
+
+    :param PytestPluginManager pluginmanager:
+        A pytest PluginManager.
+
+    :param InvocationParams invocation_params:
+        Object containing parameters regarding the :func:`pytest.main`
+        invocation.
+    """
+
+    @final
+    @dataclasses.dataclass(frozen=True)
+    class InvocationParams:
+        """Holds parameters passed during :func:`pytest.main`.
+
+        The object attributes are read-only.
+
+        .. versionadded:: 5.1
+
+        .. note::
+
+            Note that the environment variable ``PYTEST_ADDOPTS`` and the ``addopts``
+            ini option are handled by pytest, not being included in the ``args`` attribute.
+
+            Plugins accessing ``InvocationParams`` must be aware of that.
+        """
+
+        args: Tuple[str, ...]
+        """The command-line arguments as passed to :func:`pytest.main`."""
+        plugins: Optional[Sequence[Union[str, _PluggyPlugin]]]
+        """Extra plugins, might be `None`."""
+        dir: Path
+        """The directory from which :func:`pytest.main` was invoked."""
+
+        def __init__(
+            self,
+            *,
+            args: Iterable[str],
+            plugins: Optional[Sequence[Union[str, _PluggyPlugin]]],
+            dir: Path,
+        ) -> None:
+            object.__setattr__(self, "args", tuple(args))
+            object.__setattr__(self, "plugins", plugins)
+            object.__setattr__(self, "dir", dir)
+
+    class ArgsSource(enum.Enum):
+        """Indicates the source of the test arguments.
+
+        .. versionadded:: 7.2
+        """
+
+        #: Command line arguments.
+        ARGS = enum.auto()
+        #: Invocation directory.
+        INCOVATION_DIR = enum.auto()
+        #: 'testpaths' configuration value.
+        TESTPATHS = enum.auto()
+
+    def __init__(
+        self,
+        pluginmanager: PytestPluginManager,
+        *,
+        invocation_params: Optional[InvocationParams] = None,
+    ) -> None:
+        from .argparsing import Parser, FILE_OR_DIR
+
+        if invocation_params is None:
+            invocation_params = self.InvocationParams(
+                args=(), plugins=None, dir=Path.cwd()
+            )
+
+        self.option = argparse.Namespace()
+        """Access to command line option as attributes.
+
+        :type: argparse.Namespace
+        """
+
+        self.invocation_params = invocation_params
+        """The parameters with which pytest was invoked.
+
+        :type: InvocationParams
+        """
+
+        _a = FILE_OR_DIR
+        self._parser = Parser(
+            usage=f"%(prog)s [options] [{_a}] [{_a}] [...]",
+            processopt=self._processopt,
+            _ispytest=True,
+        )
+        self.pluginmanager = pluginmanager
+        """The plugin manager handles plugin registration and hook invocation.
+
+        :type: PytestPluginManager
+        """
+
+        self.stash = Stash()
+        """A place where plugins can store information on the config for their
+        own use.
+
+        :type: Stash
+        """
+        # Deprecated alias. Was never public. Can be removed in a few releases.
+        self._store = self.stash
+
+        from .compat import PathAwareHookProxy
+
+        self.trace = self.pluginmanager.trace.root.get("config")
+        self.hook = PathAwareHookProxy(self.pluginmanager.hook)
+        self._inicache: Dict[str, Any] = {}
+        self._override_ini: Sequence[str] = ()
+        self._opt2dest: Dict[str, str] = {}
+        self._cleanup: List[Callable[[], None]] = []
+        self.pluginmanager.register(self, "pytestconfig")
+        self._configured = False
+        self.hook.pytest_addoption.call_historic(
+            kwargs=dict(parser=self._parser, pluginmanager=self.pluginmanager)
+        )
+        self.args_source = Config.ArgsSource.ARGS
+        self.args: List[str] = []
+
+        if TYPE_CHECKING:
+            from _pytest.cacheprovider import Cache
+
+            self.cache: Optional[Cache] = None
+
+    @property
+    def rootpath(self) -> Path:
+        """The path to the :ref:`rootdir <rootdir>`.
+
+        :type: pathlib.Path
+
+        .. versionadded:: 6.1
+        """
+        return self._rootpath
+
+    @property
+    def inipath(self) -> Optional[Path]:
+        """The path to the :ref:`configfile <configfiles>`.
+
+        :type: Optional[pathlib.Path]
+
+        .. versionadded:: 6.1
+        """
+        return self._inipath
+
+    def add_cleanup(self, func: Callable[[], None]) -> None:
+        """Add a function to be called when the config object gets out of
+        use (usually coinciding with pytest_unconfigure)."""
+        self._cleanup.append(func)
+
+    def _do_configure(self) -> None:
+        assert not self._configured
+        self._configured = True
+        with warnings.catch_warnings():
+            warnings.simplefilter("default")
+            self.hook.pytest_configure.call_historic(kwargs=dict(config=self))
+
+    def _ensure_unconfigure(self) -> None:
+        if self._configured:
+            self._configured = False
+            self.hook.pytest_unconfigure(config=self)
+            self.hook.pytest_configure._call_history = []
+        while self._cleanup:
+            fin = self._cleanup.pop()
+            fin()
+
+    def get_terminal_writer(self) -> TerminalWriter:
+        terminalreporter: Optional[TerminalReporter] = self.pluginmanager.get_plugin(
+            "terminalreporter"
+        )
+        assert terminalreporter is not None
+        return terminalreporter._tw
+
+    def pytest_cmdline_parse(
+        self, pluginmanager: PytestPluginManager, args: List[str]
+    ) -> "Config":
+        try:
+            self.parse(args)
+        except UsageError:
+            # Handle --version and --help here in a minimal fashion.
+            # This gets done via helpconfig normally, but its
+            # pytest_cmdline_main is not called in case of errors.
+            if getattr(self.option, "version", False) or "--version" in args:
+                from _pytest.helpconfig import showversion
+
+                showversion(self)
+            elif (
+                getattr(self.option, "help", False) or "--help" in args or "-h" in args
+            ):
+                self._parser._getparser().print_help()
+                sys.stdout.write(
+                    "\nNOTE: displaying only minimal help due to UsageError.\n\n"
+                )
+
+            raise
+
+        return self
+
+    def notify_exception(
+        self,
+        excinfo: ExceptionInfo[BaseException],
+        option: Optional[argparse.Namespace] = None,
+    ) -> None:
+        if option and getattr(option, "fulltrace", False):
+            style: _TracebackStyle = "long"
+        else:
+            style = "native"
+        excrepr = excinfo.getrepr(
+            funcargs=True, showlocals=getattr(option, "showlocals", False), style=style
+        )
+        res = self.hook.pytest_internalerror(excrepr=excrepr, excinfo=excinfo)
+        if not any(res):
+            for line in str(excrepr).split("\n"):
+                sys.stderr.write("INTERNALERROR> %s\n" % line)
+                sys.stderr.flush()
+
+    def cwd_relative_nodeid(self, nodeid: str) -> str:
+        # nodeid's are relative to the rootpath, compute relative to cwd.
+        if self.invocation_params.dir != self.rootpath:
+            fullpath = self.rootpath / nodeid
+            nodeid = bestrelpath(self.invocation_params.dir, fullpath)
+        return nodeid
+
+    @classmethod
+    def fromdictargs(cls, option_dict, args) -> "Config":
+        """Constructor usable for subprocesses."""
+        config = get_config(args)
+        config.option.__dict__.update(option_dict)
+        config.parse(args, addopts=False)
+        for x in config.option.plugins:
+            config.pluginmanager.consider_pluginarg(x)
+        return config
+
+    def _processopt(self, opt: "Argument") -> None:
+        for name in opt._short_opts + opt._long_opts:
+            self._opt2dest[name] = opt.dest
+
+        if hasattr(opt, "default"):
+            if not hasattr(self.option, opt.dest):
+                setattr(self.option, opt.dest, opt.default)
+
+    @hookimpl(trylast=True)
+    def pytest_load_initial_conftests(self, early_config: "Config") -> None:
+        # We haven't fully parsed the command line arguments yet, so
+        # early_config.args it not set yet. But we need it for
+        # discovering the initial conftests. So "pre-run" the logic here.
+        # It will be done for real in `parse()`.
+        args, args_source = early_config._decide_args(
+            args=early_config.known_args_namespace.file_or_dir,
+            pyargs=early_config.known_args_namespace.pyargs,
+            testpaths=early_config.getini("testpaths"),
+            invocation_dir=early_config.invocation_params.dir,
+            rootpath=early_config.rootpath,
+            warn=False,
+        )
+        self.pluginmanager._set_initial_conftests(
+            args=args,
+            pyargs=early_config.known_args_namespace.pyargs,
+            noconftest=early_config.known_args_namespace.noconftest,
+            rootpath=early_config.rootpath,
+            confcutdir=early_config.known_args_namespace.confcutdir,
+            importmode=early_config.known_args_namespace.importmode,
+        )
+
+    def _initini(self, args: Sequence[str]) -> None:
+        ns, unknown_args = self._parser.parse_known_and_unknown_args(
+            args, namespace=copy.copy(self.option)
+        )
+        rootpath, inipath, inicfg = determine_setup(
+            ns.inifilename,
+            ns.file_or_dir + unknown_args,
+            rootdir_cmd_arg=ns.rootdir or None,
+            config=self,
+        )
+        self._rootpath = rootpath
+        self._inipath = inipath
+        self.inicfg = inicfg
+        self._parser.extra_info["rootdir"] = str(self.rootpath)
+        self._parser.extra_info["inifile"] = str(self.inipath)
+        self._parser.addini("addopts", "Extra command line options", "args")
+        self._parser.addini("minversion", "Minimally required pytest version")
+        self._parser.addini(
+            "required_plugins",
+            "Plugins that must be present for pytest to run",
+            type="args",
+            default=[],
+        )
+        self._override_ini = ns.override_ini or ()
+
+    def _consider_importhook(self, args: Sequence[str]) -> None:
+        """Install the PEP 302 import hook if using assertion rewriting.
+
+        Needs to parse the --assert=<mode> option from the commandline
+        and find all the installed plugins to mark them for rewriting
+        by the importhook.
+        """
+        ns, unknown_args = self._parser.parse_known_and_unknown_args(args)
+        mode = getattr(ns, "assertmode", "plain")
+        if mode == "rewrite":
+            import _pytest.assertion
+
+            try:
+                hook = _pytest.assertion.install_importhook(self)
+            except SystemError:
+                mode = "plain"
+            else:
+                self._mark_plugins_for_rewrite(hook)
+        self._warn_about_missing_assertion(mode)
+
+    def _mark_plugins_for_rewrite(self, hook) -> None:
+        """Given an importhook, mark for rewrite any top-level
+        modules or packages in the distribution package for
+        all pytest plugins."""
+        self.pluginmanager.rewrite_hook = hook
+
+        if os.environ.get("PYTEST_DISABLE_PLUGIN_AUTOLOAD"):
+            # We don't autoload from setuptools entry points, no need to continue.
+            return
+
+        package_files = (
+            str(file)
+            for dist in importlib_metadata.distributions()
+            if any(ep.group == "pytest11" for ep in dist.entry_points)
+            for file in dist.files or []
+        )
+
+        for name in _iter_rewritable_modules(package_files):
+            hook.mark_rewrite(name)
+
+    def _validate_args(self, args: List[str], via: str) -> List[str]:
+        """Validate known args."""
+        self._parser._config_source_hint = via  # type: ignore
+        try:
+            self._parser.parse_known_and_unknown_args(
+                args, namespace=copy.copy(self.option)
+            )
+        finally:
+            del self._parser._config_source_hint  # type: ignore
+
+        return args
+
+    def _decide_args(
+        self,
+        *,
+        args: List[str],
+        pyargs: List[str],
+        testpaths: List[str],
+        invocation_dir: Path,
+        rootpath: Path,
+        warn: bool,
+    ) -> Tuple[List[str], ArgsSource]:
+        """Decide the args (initial paths/nodeids) to use given the relevant inputs.
+
+        :param warn: Whether can issue warnings.
+        """
+        if args:
+            source = Config.ArgsSource.ARGS
+            result = args
+        else:
+            if invocation_dir == rootpath:
+                source = Config.ArgsSource.TESTPATHS
+                if pyargs:
+                    result = testpaths
+                else:
+                    result = []
+                    for path in testpaths:
+                        result.extend(sorted(glob.iglob(path, recursive=True)))
+                    if testpaths and not result:
+                        if warn:
+                            warning_text = (
+                                "No files were found in testpaths; "
+                                "consider removing or adjusting your testpaths configuration. "
+                                "Searching recursively from the current directory instead."
+                            )
+                            self.issue_config_time_warning(
+                                PytestConfigWarning(warning_text), stacklevel=3
+                            )
+            else:
+                result = []
+            if not result:
+                source = Config.ArgsSource.INCOVATION_DIR
+                result = [str(invocation_dir)]
+        return result, source
+
+    def _preparse(self, args: List[str], addopts: bool = True) -> None:
+        if addopts:
+            env_addopts = os.environ.get("PYTEST_ADDOPTS", "")
+            if len(env_addopts):
+                args[:] = (
+                    self._validate_args(shlex.split(env_addopts), "via PYTEST_ADDOPTS")
+                    + args
+                )
+        self._initini(args)
+        if addopts:
+            args[:] = (
+                self._validate_args(self.getini("addopts"), "via addopts config") + args
+            )
+
+        self.known_args_namespace = self._parser.parse_known_args(
+            args, namespace=copy.copy(self.option)
+        )
+        self._checkversion()
+        self._consider_importhook(args)
+        self.pluginmanager.consider_preparse(args, exclude_only=False)
+        if not os.environ.get("PYTEST_DISABLE_PLUGIN_AUTOLOAD"):
+            # Don't autoload from setuptools entry point. Only explicitly specified
+            # plugins are going to be loaded.
+            self.pluginmanager.load_setuptools_entrypoints("pytest11")
+        self.pluginmanager.consider_env()
+
+        self.known_args_namespace = self._parser.parse_known_args(
+            args, namespace=copy.copy(self.known_args_namespace)
+        )
+
+        self._validate_plugins()
+        self._warn_about_skipped_plugins()
+
+        if self.known_args_namespace.strict:
+            self.issue_config_time_warning(
+                _pytest.deprecated.STRICT_OPTION, stacklevel=2
+            )
+
+        if self.known_args_namespace.confcutdir is None:
+            if self.inipath is not None:
+                confcutdir = str(self.inipath.parent)
+            else:
+                confcutdir = str(self.rootpath)
+            self.known_args_namespace.confcutdir = confcutdir
+        try:
+            self.hook.pytest_load_initial_conftests(
+                early_config=self, args=args, parser=self._parser
+            )
+        except ConftestImportFailure as e:
+            if self.known_args_namespace.help or self.known_args_namespace.version:
+                # we don't want to prevent --help/--version to work
+                # so just let is pass and print a warning at the end
+                self.issue_config_time_warning(
+                    PytestConfigWarning(f"could not load initial conftests: {e.path}"),
+                    stacklevel=2,
+                )
+            else:
+                raise
+
+    @hookimpl(hookwrapper=True)
+    def pytest_collection(self) -> Generator[None, None, None]:
+        # Validate invalid ini keys after collection is done so we take in account
+        # options added by late-loading conftest files.
+        yield
+        self._validate_config_options()
+
+    def _checkversion(self) -> None:
+        import pytest
+
+        minver = self.inicfg.get("minversion", None)
+        if minver:
+            # Imported lazily to improve start-up time.
+            from packaging.version import Version
+
+            if not isinstance(minver, str):
+                raise pytest.UsageError(
+                    "%s: 'minversion' must be a single value" % self.inipath
+                )
+
+            if Version(minver) > Version(pytest.__version__):
+                raise pytest.UsageError(
+                    "%s: 'minversion' requires pytest-%s, actual pytest-%s'"
+                    % (
+                        self.inipath,
+                        minver,
+                        pytest.__version__,
+                    )
+                )
+
+    def _validate_config_options(self) -> None:
+        for key in sorted(self._get_unknown_ini_keys()):
+            self._warn_or_fail_if_strict(f"Unknown config option: {key}\n")
+
+    def _validate_plugins(self) -> None:
+        required_plugins = sorted(self.getini("required_plugins"))
+        if not required_plugins:
+            return
+
+        # Imported lazily to improve start-up time.
+        from packaging.version import Version
+        from packaging.requirements import InvalidRequirement, Requirement
+
+        plugin_info = self.pluginmanager.list_plugin_distinfo()
+        plugin_dist_info = {dist.project_name: dist.version for _, dist in plugin_info}
+
+        missing_plugins = []
+        for required_plugin in required_plugins:
+            try:
+                req = Requirement(required_plugin)
+            except InvalidRequirement:
+                missing_plugins.append(required_plugin)
+                continue
+
+            if req.name not in plugin_dist_info:
+                missing_plugins.append(required_plugin)
+            elif not req.specifier.contains(
+                Version(plugin_dist_info[req.name]), prereleases=True
+            ):
+                missing_plugins.append(required_plugin)
+
+        if missing_plugins:
+            raise UsageError(
+                "Missing required plugins: {}".format(", ".join(missing_plugins)),
+            )
+
+    def _warn_or_fail_if_strict(self, message: str) -> None:
+        if self.known_args_namespace.strict_config:
+            raise UsageError(message)
+
+        self.issue_config_time_warning(PytestConfigWarning(message), stacklevel=3)
+
+    def _get_unknown_ini_keys(self) -> List[str]:
+        parser_inicfg = self._parser._inidict
+        return [name for name in self.inicfg if name not in parser_inicfg]
+
+    def parse(self, args: List[str], addopts: bool = True) -> None:
+        # Parse given cmdline arguments into this config object.
+        assert (
+            self.args == []
+        ), "can only parse cmdline args at most once per Config object"
+        self.hook.pytest_addhooks.call_historic(
+            kwargs=dict(pluginmanager=self.pluginmanager)
+        )
+        self._preparse(args, addopts=addopts)
+        # XXX deprecated hook:
+        self.hook.pytest_cmdline_preparse(config=self, args=args)
+        self._parser.after_preparse = True  # type: ignore
+        try:
+            args = self._parser.parse_setoption(
+                args, self.option, namespace=self.option
+            )
+            self.args, self.args_source = self._decide_args(
+                args=args,
+                pyargs=self.known_args_namespace.pyargs,
+                testpaths=self.getini("testpaths"),
+                invocation_dir=self.invocation_params.dir,
+                rootpath=self.rootpath,
+                warn=True,
+            )
+        except PrintHelp:
+            pass
+
+    def issue_config_time_warning(self, warning: Warning, stacklevel: int) -> None:
+        """Issue and handle a warning during the "configure" stage.
+
+        During ``pytest_configure`` we can't capture warnings using the ``catch_warnings_for_item``
+        function because it is not possible to have hookwrappers around ``pytest_configure``.
+
+        This function is mainly intended for plugins that need to issue warnings during
+        ``pytest_configure`` (or similar stages).
+
+        :param warning: The warning instance.
+        :param stacklevel: stacklevel forwarded to warnings.warn.
+        """
+        if self.pluginmanager.is_blocked("warnings"):
+            return
+
+        cmdline_filters = self.known_args_namespace.pythonwarnings or []
+        config_filters = self.getini("filterwarnings")
+
+        with warnings.catch_warnings(record=True) as records:
+            warnings.simplefilter("always", type(warning))
+            apply_warning_filters(config_filters, cmdline_filters)
+            warnings.warn(warning, stacklevel=stacklevel)
+
+        if records:
+            frame = sys._getframe(stacklevel - 1)
+            location = frame.f_code.co_filename, frame.f_lineno, frame.f_code.co_name
+            self.hook.pytest_warning_recorded.call_historic(
+                kwargs=dict(
+                    warning_message=records[0],
+                    when="config",
+                    nodeid="",
+                    location=location,
+                )
+            )
+
+    def addinivalue_line(self, name: str, line: str) -> None:
+        """Add a line to an ini-file option. The option must have been
+        declared but might not yet be set in which case the line becomes
+        the first line in its value."""
+        x = self.getini(name)
+        assert isinstance(x, list)
+        x.append(line)  # modifies the cached list inline
+
+    def getini(self, name: str):
+        """Return configuration value from an :ref:`ini file <configfiles>`.
+
+        If the specified name hasn't been registered through a prior
+        :func:`parser.addini <pytest.Parser.addini>` call (usually from a
+        plugin), a ValueError is raised.
+        """
+        try:
+            return self._inicache[name]
+        except KeyError:
+            self._inicache[name] = val = self._getini(name)
+            return val
+
+    # Meant for easy monkeypatching by legacypath plugin.
+    # Can be inlined back (with no cover removed) once legacypath is gone.
+    def _getini_unknown_type(self, name: str, type: str, value: Union[str, List[str]]):
+        msg = f"unknown configuration type: {type}"
+        raise ValueError(msg, value)  # pragma: no cover
+
+    def _getini(self, name: str):
+        try:
+            description, type, default = self._parser._inidict[name]
+        except KeyError as e:
+            raise ValueError(f"unknown configuration value: {name!r}") from e
+        override_value = self._get_override_ini_value(name)
+        if override_value is None:
+            try:
+                value = self.inicfg[name]
+            except KeyError:
+                if default is not None:
+                    return default
+                if type is None:
+                    return ""
+                return []
+        else:
+            value = override_value
+        # Coerce the values based on types.
+        #
+        # Note: some coercions are only required if we are reading from .ini files, because
+        # the file format doesn't contain type information, but when reading from toml we will
+        # get either str or list of str values (see _parse_ini_config_from_pyproject_toml).
+        # For example:
+        #
+        #   ini:
+        #     a_line_list = "tests acceptance"
+        #   in this case, we need to split the string to obtain a list of strings.
+        #
+        #   toml:
+        #     a_line_list = ["tests", "acceptance"]
+        #   in this case, we already have a list ready to use.
+        #
+        if type == "paths":
+            # TODO: This assert is probably not valid in all cases.
+            assert self.inipath is not None
+            dp = self.inipath.parent
+            input_values = shlex.split(value) if isinstance(value, str) else value
+            return [dp / x for x in input_values]
+        elif type == "args":
+            return shlex.split(value) if isinstance(value, str) else value
+        elif type == "linelist":
+            if isinstance(value, str):
+                return [t for t in map(lambda x: x.strip(), value.split("\n")) if t]
+            else:
+                return value
+        elif type == "bool":
+            return _strtobool(str(value).strip())
+        elif type == "string":
+            return value
+        elif type is None:
+            return value
+        else:
+            return self._getini_unknown_type(name, type, value)
+
+    def _getconftest_pathlist(
+        self, name: str, path: Path, rootpath: Path
+    ) -> Optional[List[Path]]:
+        try:
+            mod, relroots = self.pluginmanager._rget_with_confmod(
+                name, path, self.getoption("importmode"), rootpath
+            )
+        except KeyError:
+            return None
+        assert mod.__file__ is not None
+        modpath = Path(mod.__file__).parent
+        values: List[Path] = []
+        for relroot in relroots:
+            if isinstance(relroot, os.PathLike):
+                relroot = Path(relroot)
+            else:
+                relroot = relroot.replace("/", os.sep)
+                relroot = absolutepath(modpath / relroot)
+            values.append(relroot)
+        return values
+
+    def _get_override_ini_value(self, name: str) -> Optional[str]:
+        value = None
+        # override_ini is a list of "ini=value" options.
+        # Always use the last item if multiple values are set for same ini-name,
+        # e.g. -o foo=bar1 -o foo=bar2 will set foo to bar2.
+        for ini_config in self._override_ini:
+            try:
+                key, user_ini_value = ini_config.split("=", 1)
+            except ValueError as e:
+                raise UsageError(
+                    "-o/--override-ini expects option=value style (got: {!r}).".format(
+                        ini_config
+                    )
+                ) from e
+            else:
+                if key == name:
+                    value = user_ini_value
+        return value
+
+    def getoption(self, name: str, default=notset, skip: bool = False):
+        """Return command line option value.
+
+        :param name: Name of the option.  You may also specify
+            the literal ``--OPT`` option instead of the "dest" option name.
+        :param default: Default value if no option of that name exists.
+        :param skip: If True, raise pytest.skip if option does not exists
+            or has a None value.
+        """
+        name = self._opt2dest.get(name, name)
+        try:
+            val = getattr(self.option, name)
+            if val is None and skip:
+                raise AttributeError(name)
+            return val
+        except AttributeError as e:
+            if default is not notset:
+                return default
+            if skip:
+                import pytest
+
+                pytest.skip(f"no {name!r} option found")
+            raise ValueError(f"no option named {name!r}") from e
+
+    def getvalue(self, name: str, path=None):
+        """Deprecated, use getoption() instead."""
+        return self.getoption(name)
+
+    def getvalueorskip(self, name: str, path=None):
+        """Deprecated, use getoption(skip=True) instead."""
+        return self.getoption(name, skip=True)
+
+    def _warn_about_missing_assertion(self, mode: str) -> None:
+        if not _assertion_supported():
+            if mode == "plain":
+                warning_text = (
+                    "ASSERTIONS ARE NOT EXECUTED"
+                    " and FAILING TESTS WILL PASS.  Are you"
+                    " using python -O?"
+                )
+            else:
+                warning_text = (
+                    "assertions not in test modules or"
+                    " plugins will be ignored"
+                    " because assert statements are not executed "
+                    "by the underlying Python interpreter "
+                    "(are you using python -O?)\n"
+                )
+            self.issue_config_time_warning(
+                PytestConfigWarning(warning_text),
+                stacklevel=3,
+            )
+
+    def _warn_about_skipped_plugins(self) -> None:
+        for module_name, msg in self.pluginmanager.skipped_plugins:
+            self.issue_config_time_warning(
+                PytestConfigWarning(f"skipped plugin {module_name!r}: {msg}"),
+                stacklevel=2,
+            )
+
+
+def _assertion_supported() -> bool:
+    try:
+        assert False
+    except AssertionError:
+        return True
+    else:
+        return False  # type: ignore[unreachable]
+
+
+def create_terminal_writer(
+    config: Config, file: Optional[TextIO] = None
+) -> TerminalWriter:
+    """Create a TerminalWriter instance configured according to the options
+    in the config object.
+
+    Every code which requires a TerminalWriter object and has access to a
+    config object should use this function.
+    """
+    tw = TerminalWriter(file=file)
+
+    if config.option.color == "yes":
+        tw.hasmarkup = True
+    elif config.option.color == "no":
+        tw.hasmarkup = False
+
+    if config.option.code_highlight == "yes":
+        tw.code_highlight = True
+    elif config.option.code_highlight == "no":
+        tw.code_highlight = False
+
+    return tw
+
+
+def _strtobool(val: str) -> bool:
+    """Convert a string representation of truth to True or False.
+
+    True values are 'y', 'yes', 't', 'true', 'on', and '1'; false values
+    are 'n', 'no', 'f', 'false', 'off', and '0'.  Raises ValueError if
+    'val' is anything else.
+
+    .. note:: Copied from distutils.util.
+    """
+    val = val.lower()
+    if val in ("y", "yes", "t", "true", "on", "1"):
+        return True
+    elif val in ("n", "no", "f", "false", "off", "0"):
+        return False
+    else:
+        raise ValueError(f"invalid truth value {val!r}")
+
+
+@lru_cache(maxsize=50)
+def parse_warning_filter(
+    arg: str, *, escape: bool
+) -> Tuple["warnings._ActionKind", str, Type[Warning], str, int]:
+    """Parse a warnings filter string.
+
+    This is copied from warnings._setoption with the following changes:
+
+    * Does not apply the filter.
+    * Escaping is optional.
+    * Raises UsageError so we get nice error messages on failure.
+    """
+    __tracebackhide__ = True
+    error_template = dedent(
+        f"""\
+        while parsing the following warning configuration:
+
+          {arg}
+
+        This error occurred:
+
+        {{error}}
+        """
+    )
+
+    parts = arg.split(":")
+    if len(parts) > 5:
+        doc_url = (
+            "https://docs.python.org/3/library/warnings.html#describing-warning-filters"
+        )
+        error = dedent(
+            f"""\
+            Too many fields ({len(parts)}), expected at most 5 separated by colons:
+
+              action:message:category:module:line
+
+            For more information please consult: {doc_url}
+            """
+        )
+        raise UsageError(error_template.format(error=error))
+
+    while len(parts) < 5:
+        parts.append("")
+    action_, message, category_, module, lineno_ = (s.strip() for s in parts)
+    try:
+        action: "warnings._ActionKind" = warnings._getaction(action_)  # type: ignore[attr-defined]
+    except warnings._OptionError as e:
+        raise UsageError(error_template.format(error=str(e)))
+    try:
+        category: Type[Warning] = _resolve_warning_category(category_)
+    except Exception:
+        exc_info = ExceptionInfo.from_current()
+        exception_text = exc_info.getrepr(style="native")
+        raise UsageError(error_template.format(error=exception_text))
+    if message and escape:
+        message = re.escape(message)
+    if module and escape:
+        module = re.escape(module) + r"\Z"
+    if lineno_:
+        try:
+            lineno = int(lineno_)
+            if lineno < 0:
+                raise ValueError("number is negative")
+        except ValueError as e:
+            raise UsageError(
+                error_template.format(error=f"invalid lineno {lineno_!r}: {e}")
+            )
+    else:
+        lineno = 0
+    return action, message, category, module, lineno
+
+
+def _resolve_warning_category(category: str) -> Type[Warning]:
+    """
+    Copied from warnings._getcategory, but changed so it lets exceptions (specially ImportErrors)
+    propagate so we can get access to their tracebacks (#9218).
+    """
+    __tracebackhide__ = True
+    if not category:
+        return Warning
+
+    if "." not in category:
+        import builtins as m
+
+        klass = category
+    else:
+        module, _, klass = category.rpartition(".")
+        m = __import__(module, None, None, [klass])
+    cat = getattr(m, klass)
+    if not issubclass(cat, Warning):
+        raise UsageError(f"{cat} is not a Warning subclass")
+    return cast(Type[Warning], cat)
+
+
+def apply_warning_filters(
+    config_filters: Iterable[str], cmdline_filters: Iterable[str]
+) -> None:
+    """Applies pytest-configured filters to the warnings module"""
+    # Filters should have this precedence: cmdline options, config.
+    # Filters should be applied in the inverse order of precedence.
+    for arg in config_filters:
+        warnings.filterwarnings(*parse_warning_filter(arg, escape=False))
+
+    for arg in cmdline_filters:
+        warnings.filterwarnings(*parse_warning_filter(arg, escape=True))
diff --git a/contrib/python/pytest/py3/_pytest/config/argparsing.py b/contrib/python/pytest/py3/_pytest/config/argparsing.py
new file mode 100644
index 0000000000..d3f01916b6
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/config/argparsing.py
@@ -0,0 +1,551 @@
+import argparse
+import os
+import sys
+import warnings
+from gettext import gettext
+from typing import Any
+from typing import Callable
+from typing import cast
+from typing import Dict
+from typing import List
+from typing import Mapping
+from typing import NoReturn
+from typing import Optional
+from typing import Sequence
+from typing import Tuple
+from typing import TYPE_CHECKING
+from typing import Union
+
+import _pytest._io
+from _pytest.compat import final
+from _pytest.config.exceptions import UsageError
+from _pytest.deprecated import ARGUMENT_PERCENT_DEFAULT
+from _pytest.deprecated import ARGUMENT_TYPE_STR
+from _pytest.deprecated import ARGUMENT_TYPE_STR_CHOICE
+from _pytest.deprecated import check_ispytest
+
+if TYPE_CHECKING:
+    from typing_extensions import Literal
+
+FILE_OR_DIR = "file_or_dir"
+
+
+@final
+class Parser:
+    """Parser for command line arguments and ini-file values.
+
+    :ivar extra_info: Dict of generic param -> value to display in case
+        there's an error processing the command line arguments.
+    """
+
+    prog: Optional[str] = None
+
+    def __init__(
+        self,
+        usage: Optional[str] = None,
+        processopt: Optional[Callable[["Argument"], None]] = None,
+        *,
+        _ispytest: bool = False,
+    ) -> None:
+        check_ispytest(_ispytest)
+        self._anonymous = OptionGroup("Custom options", parser=self, _ispytest=True)
+        self._groups: List[OptionGroup] = []
+        self._processopt = processopt
+        self._usage = usage
+        self._inidict: Dict[str, Tuple[str, Optional[str], Any]] = {}
+        self._ininames: List[str] = []
+        self.extra_info: Dict[str, Any] = {}
+
+    def processoption(self, option: "Argument") -> None:
+        if self._processopt:
+            if option.dest:
+                self._processopt(option)
+
+    def getgroup(
+        self, name: str, description: str = "", after: Optional[str] = None
+    ) -> "OptionGroup":
+        """Get (or create) a named option Group.
+
+        :param name: Name of the option group.
+        :param description: Long description for --help output.
+        :param after: Name of another group, used for ordering --help output.
+        :returns: The option group.
+
+        The returned group object has an ``addoption`` method with the same
+        signature as :func:`parser.addoption <pytest.Parser.addoption>` but
+        will be shown in the respective group in the output of
+        ``pytest --help``.
+        """
+        for group in self._groups:
+            if group.name == name:
+                return group
+        group = OptionGroup(name, description, parser=self, _ispytest=True)
+        i = 0
+        for i, grp in enumerate(self._groups):
+            if grp.name == after:
+                break
+        self._groups.insert(i + 1, group)
+        return group
+
+    def addoption(self, *opts: str, **attrs: Any) -> None:
+        """Register a command line option.
+
+        :param opts:
+            Option names, can be short or long options.
+        :param attrs:
+            Same attributes as the argparse library's :py:func:`add_argument()
+            <argparse.ArgumentParser.add_argument>` function accepts.
+
+        After command line parsing, options are available on the pytest config
+        object via ``config.option.NAME`` where ``NAME`` is usually set
+        by passing a ``dest`` attribute, for example
+        ``addoption("--long", dest="NAME", ...)``.
+        """
+        self._anonymous.addoption(*opts, **attrs)
+
+    def parse(
+        self,
+        args: Sequence[Union[str, "os.PathLike[str]"]],
+        namespace: Optional[argparse.Namespace] = None,
+    ) -> argparse.Namespace:
+        from _pytest._argcomplete import try_argcomplete
+
+        self.optparser = self._getparser()
+        try_argcomplete(self.optparser)
+        strargs = [os.fspath(x) for x in args]
+        return self.optparser.parse_args(strargs, namespace=namespace)
+
+    def _getparser(self) -> "MyOptionParser":
+        from _pytest._argcomplete import filescompleter
+
+        optparser = MyOptionParser(self, self.extra_info, prog=self.prog)
+        groups = self._groups + [self._anonymous]
+        for group in groups:
+            if group.options:
+                desc = group.description or group.name
+                arggroup = optparser.add_argument_group(desc)
+                for option in group.options:
+                    n = option.names()
+                    a = option.attrs()
+                    arggroup.add_argument(*n, **a)
+        file_or_dir_arg = optparser.add_argument(FILE_OR_DIR, nargs="*")
+        # bash like autocompletion for dirs (appending '/')
+        # Type ignored because typeshed doesn't know about argcomplete.
+        file_or_dir_arg.completer = filescompleter  # type: ignore
+        return optparser
+
+    def parse_setoption(
+        self,
+        args: Sequence[Union[str, "os.PathLike[str]"]],
+        option: argparse.Namespace,
+        namespace: Optional[argparse.Namespace] = None,
+    ) -> List[str]:
+        parsedoption = self.parse(args, namespace=namespace)
+        for name, value in parsedoption.__dict__.items():
+            setattr(option, name, value)
+        return cast(List[str], getattr(parsedoption, FILE_OR_DIR))
+
+    def parse_known_args(
+        self,
+        args: Sequence[Union[str, "os.PathLike[str]"]],
+        namespace: Optional[argparse.Namespace] = None,
+    ) -> argparse.Namespace:
+        """Parse the known arguments at this point.
+
+        :returns: An argparse namespace object.
+        """
+        return self.parse_known_and_unknown_args(args, namespace=namespace)[0]
+
+    def parse_known_and_unknown_args(
+        self,
+        args: Sequence[Union[str, "os.PathLike[str]"]],
+        namespace: Optional[argparse.Namespace] = None,
+    ) -> Tuple[argparse.Namespace, List[str]]:
+        """Parse the known arguments at this point, and also return the
+        remaining unknown arguments.
+
+        :returns:
+            A tuple containing an argparse namespace object for the known
+            arguments, and a list of the unknown arguments.
+        """
+        optparser = self._getparser()
+        strargs = [os.fspath(x) for x in args]
+        return optparser.parse_known_args(strargs, namespace=namespace)
+
+    def addini(
+        self,
+        name: str,
+        help: str,
+        type: Optional[
+            "Literal['string', 'paths', 'pathlist', 'args', 'linelist', 'bool']"
+        ] = None,
+        default: Any = None,
+    ) -> None:
+        """Register an ini-file option.
+
+        :param name:
+            Name of the ini-variable.
+        :param type:
+            Type of the variable. Can be:
+
+                * ``string``: a string
+                * ``bool``: a boolean
+                * ``args``: a list of strings, separated as in a shell
+                * ``linelist``: a list of strings, separated by line breaks
+                * ``paths``: a list of :class:`pathlib.Path`, separated as in a shell
+                * ``pathlist``: a list of ``py.path``, separated as in a shell
+
+            .. versionadded:: 7.0
+                The ``paths`` variable type.
+
+            Defaults to ``string`` if ``None`` or not passed.
+        :param default:
+            Default value if no ini-file option exists but is queried.
+
+        The value of ini-variables can be retrieved via a call to
+        :py:func:`config.getini(name) <pytest.Config.getini>`.
+        """
+        assert type in (None, "string", "paths", "pathlist", "args", "linelist", "bool")
+        self._inidict[name] = (help, type, default)
+        self._ininames.append(name)
+
+
+class ArgumentError(Exception):
+    """Raised if an Argument instance is created with invalid or
+    inconsistent arguments."""
+
+    def __init__(self, msg: str, option: Union["Argument", str]) -> None:
+        self.msg = msg
+        self.option_id = str(option)
+
+    def __str__(self) -> str:
+        if self.option_id:
+            return f"option {self.option_id}: {self.msg}"
+        else:
+            return self.msg
+
+
+class Argument:
+    """Class that mimics the necessary behaviour of optparse.Option.
+
+    It's currently a least effort implementation and ignoring choices
+    and integer prefixes.
+
+    https://docs.python.org/3/library/optparse.html#optparse-standard-option-types
+    """
+
+    _typ_map = {"int": int, "string": str, "float": float, "complex": complex}
+
+    def __init__(self, *names: str, **attrs: Any) -> None:
+        """Store params in private vars for use in add_argument."""
+        self._attrs = attrs
+        self._short_opts: List[str] = []
+        self._long_opts: List[str] = []
+        if "%default" in (attrs.get("help") or ""):
+            warnings.warn(ARGUMENT_PERCENT_DEFAULT, stacklevel=3)
+        try:
+            typ = attrs["type"]
+        except KeyError:
+            pass
+        else:
+            # This might raise a keyerror as well, don't want to catch that.
+            if isinstance(typ, str):
+                if typ == "choice":
+                    warnings.warn(
+                        ARGUMENT_TYPE_STR_CHOICE.format(typ=typ, names=names),
+                        stacklevel=4,
+                    )
+                    # argparse expects a type here take it from
+                    # the type of the first element
+                    attrs["type"] = type(attrs["choices"][0])
+                else:
+                    warnings.warn(
+                        ARGUMENT_TYPE_STR.format(typ=typ, names=names), stacklevel=4
+                    )
+                    attrs["type"] = Argument._typ_map[typ]
+                # Used in test_parseopt -> test_parse_defaultgetter.
+                self.type = attrs["type"]
+            else:
+                self.type = typ
+        try:
+            # Attribute existence is tested in Config._processopt.
+            self.default = attrs["default"]
+        except KeyError:
+            pass
+        self._set_opt_strings(names)
+        dest: Optional[str] = attrs.get("dest")
+        if dest:
+            self.dest = dest
+        elif self._long_opts:
+            self.dest = self._long_opts[0][2:].replace("-", "_")
+        else:
+            try:
+                self.dest = self._short_opts[0][1:]
+            except IndexError as e:
+                self.dest = "???"  # Needed for the error repr.
+                raise ArgumentError("need a long or short option", self) from e
+
+    def names(self) -> List[str]:
+        return self._short_opts + self._long_opts
+
+    def attrs(self) -> Mapping[str, Any]:
+        # Update any attributes set by processopt.
+        attrs = "default dest help".split()
+        attrs.append(self.dest)
+        for attr in attrs:
+            try:
+                self._attrs[attr] = getattr(self, attr)
+            except AttributeError:
+                pass
+        if self._attrs.get("help"):
+            a = self._attrs["help"]
+            a = a.replace("%default", "%(default)s")
+            # a = a.replace('%prog', '%(prog)s')
+            self._attrs["help"] = a
+        return self._attrs
+
+    def _set_opt_strings(self, opts: Sequence[str]) -> None:
+        """Directly from optparse.
+
+        Might not be necessary as this is passed to argparse later on.
+        """
+        for opt in opts:
+            if len(opt) < 2:
+                raise ArgumentError(
+                    "invalid option string %r: "
+                    "must be at least two characters long" % opt,
+                    self,
+                )
+            elif len(opt) == 2:
+                if not (opt[0] == "-" and opt[1] != "-"):
+                    raise ArgumentError(
+                        "invalid short option string %r: "
+                        "must be of the form -x, (x any non-dash char)" % opt,
+                        self,
+                    )
+                self._short_opts.append(opt)
+            else:
+                if not (opt[0:2] == "--" and opt[2] != "-"):
+                    raise ArgumentError(
+                        "invalid long option string %r: "
+                        "must start with --, followed by non-dash" % opt,
+                        self,
+                    )
+                self._long_opts.append(opt)
+
+    def __repr__(self) -> str:
+        args: List[str] = []
+        if self._short_opts:
+            args += ["_short_opts: " + repr(self._short_opts)]
+        if self._long_opts:
+            args += ["_long_opts: " + repr(self._long_opts)]
+        args += ["dest: " + repr(self.dest)]
+        if hasattr(self, "type"):
+            args += ["type: " + repr(self.type)]
+        if hasattr(self, "default"):
+            args += ["default: " + repr(self.default)]
+        return "Argument({})".format(", ".join(args))
+
+
+class OptionGroup:
+    """A group of options shown in its own section."""
+
+    def __init__(
+        self,
+        name: str,
+        description: str = "",
+        parser: Optional[Parser] = None,
+        *,
+        _ispytest: bool = False,
+    ) -> None:
+        check_ispytest(_ispytest)
+        self.name = name
+        self.description = description
+        self.options: List[Argument] = []
+        self.parser = parser
+
+    def addoption(self, *opts: str, **attrs: Any) -> None:
+        """Add an option to this group.
+
+        If a shortened version of a long option is specified, it will
+        be suppressed in the help. ``addoption('--twowords', '--two-words')``
+        results in help showing ``--two-words`` only, but ``--twowords`` gets
+        accepted **and** the automatic destination is in ``args.twowords``.
+
+        :param opts:
+            Option names, can be short or long options.
+        :param attrs:
+            Same attributes as the argparse library's :py:func:`add_argument()
+            <argparse.ArgumentParser.add_argument>` function accepts.
+        """
+        conflict = set(opts).intersection(
+            name for opt in self.options for name in opt.names()
+        )
+        if conflict:
+            raise ValueError("option names %s already added" % conflict)
+        option = Argument(*opts, **attrs)
+        self._addoption_instance(option, shortupper=False)
+
+    def _addoption(self, *opts: str, **attrs: Any) -> None:
+        option = Argument(*opts, **attrs)
+        self._addoption_instance(option, shortupper=True)
+
+    def _addoption_instance(self, option: "Argument", shortupper: bool = False) -> None:
+        if not shortupper:
+            for opt in option._short_opts:
+                if opt[0] == "-" and opt[1].islower():
+                    raise ValueError("lowercase shortoptions reserved")
+        if self.parser:
+            self.parser.processoption(option)
+        self.options.append(option)
+
+
+class MyOptionParser(argparse.ArgumentParser):
+    def __init__(
+        self,
+        parser: Parser,
+        extra_info: Optional[Dict[str, Any]] = None,
+        prog: Optional[str] = None,
+    ) -> None:
+        self._parser = parser
+        super().__init__(
+            prog=prog,
+            usage=parser._usage,
+            add_help=False,
+            formatter_class=DropShorterLongHelpFormatter,
+            allow_abbrev=False,
+        )
+        # extra_info is a dict of (param -> value) to display if there's
+        # an usage error to provide more contextual information to the user.
+        self.extra_info = extra_info if extra_info else {}
+
+    def error(self, message: str) -> NoReturn:
+        """Transform argparse error message into UsageError."""
+        msg = f"{self.prog}: error: {message}"
+
+        if hasattr(self._parser, "_config_source_hint"):
+            # Type ignored because the attribute is set dynamically.
+            msg = f"{msg} ({self._parser._config_source_hint})"  # type: ignore
+
+        raise UsageError(self.format_usage() + msg)
+
+    # Type ignored because typeshed has a very complex type in the superclass.
+    def parse_args(  # type: ignore
+        self,
+        args: Optional[Sequence[str]] = None,
+        namespace: Optional[argparse.Namespace] = None,
+    ) -> argparse.Namespace:
+        """Allow splitting of positional arguments."""
+        parsed, unrecognized = self.parse_known_args(args, namespace)
+        if unrecognized:
+            for arg in unrecognized:
+                if arg and arg[0] == "-":
+                    lines = ["unrecognized arguments: %s" % (" ".join(unrecognized))]
+                    for k, v in sorted(self.extra_info.items()):
+                        lines.append(f"  {k}: {v}")
+                    self.error("\n".join(lines))
+            getattr(parsed, FILE_OR_DIR).extend(unrecognized)
+        return parsed
+
+    if sys.version_info[:2] < (3, 9):  # pragma: no cover
+        # Backport of https://github.com/python/cpython/pull/14316 so we can
+        # disable long --argument abbreviations without breaking short flags.
+        def _parse_optional(
+            self, arg_string: str
+        ) -> Optional[Tuple[Optional[argparse.Action], str, Optional[str]]]:
+            if not arg_string:
+                return None
+            if not arg_string[0] in self.prefix_chars:
+                return None
+            if arg_string in self._option_string_actions:
+                action = self._option_string_actions[arg_string]
+                return action, arg_string, None
+            if len(arg_string) == 1:
+                return None
+            if "=" in arg_string:
+                option_string, explicit_arg = arg_string.split("=", 1)
+                if option_string in self._option_string_actions:
+                    action = self._option_string_actions[option_string]
+                    return action, option_string, explicit_arg
+            if self.allow_abbrev or not arg_string.startswith("--"):
+                option_tuples = self._get_option_tuples(arg_string)
+                if len(option_tuples) > 1:
+                    msg = gettext(
+                        "ambiguous option: %(option)s could match %(matches)s"
+                    )
+                    options = ", ".join(option for _, option, _ in option_tuples)
+                    self.error(msg % {"option": arg_string, "matches": options})
+                elif len(option_tuples) == 1:
+                    (option_tuple,) = option_tuples
+                    return option_tuple
+            if self._negative_number_matcher.match(arg_string):
+                if not self._has_negative_number_optionals:
+                    return None
+            if " " in arg_string:
+                return None
+            return None, arg_string, None
+
+
+class DropShorterLongHelpFormatter(argparse.HelpFormatter):
+    """Shorten help for long options that differ only in extra hyphens.
+
+    - Collapse **long** options that are the same except for extra hyphens.
+    - Shortcut if there are only two options and one of them is a short one.
+    - Cache result on the action object as this is called at least 2 times.
+    """
+
+    def __init__(self, *args: Any, **kwargs: Any) -> None:
+        # Use more accurate terminal width.
+        if "width" not in kwargs:
+            kwargs["width"] = _pytest._io.get_terminal_width()
+        super().__init__(*args, **kwargs)
+
+    def _format_action_invocation(self, action: argparse.Action) -> str:
+        orgstr = super()._format_action_invocation(action)
+        if orgstr and orgstr[0] != "-":  # only optional arguments
+            return orgstr
+        res: Optional[str] = getattr(action, "_formatted_action_invocation", None)
+        if res:
+            return res
+        options = orgstr.split(", ")
+        if len(options) == 2 and (len(options[0]) == 2 or len(options[1]) == 2):
+            # a shortcut for '-h, --help' or '--abc', '-a'
+            action._formatted_action_invocation = orgstr  # type: ignore
+            return orgstr
+        return_list = []
+        short_long: Dict[str, str] = {}
+        for option in options:
+            if len(option) == 2 or option[2] == " ":
+                continue
+            if not option.startswith("--"):
+                raise ArgumentError(
+                    'long optional argument without "--": [%s]' % (option), option
+                )
+            xxoption = option[2:]
+            shortened = xxoption.replace("-", "")
+            if shortened not in short_long or len(short_long[shortened]) < len(
+                xxoption
+            ):
+                short_long[shortened] = xxoption
+        # now short_long has been filled out to the longest with dashes
+        # **and** we keep the right option ordering from add_argument
+        for option in options:
+            if len(option) == 2 or option[2] == " ":
+                return_list.append(option)
+            if option[2:] == short_long.get(option.replace("-", "")):
+                return_list.append(option.replace(" ", "=", 1))
+        formatted_action_invocation = ", ".join(return_list)
+        action._formatted_action_invocation = formatted_action_invocation  # type: ignore
+        return formatted_action_invocation
+
+    def _split_lines(self, text, width):
+        """Wrap lines after splitting on original newlines.
+
+        This allows to have explicit line breaks in the help text.
+        """
+        import textwrap
+
+        lines = []
+        for line in text.splitlines():
+            lines.extend(textwrap.wrap(line.strip(), width))
+        return lines
diff --git a/contrib/python/pytest/py3/_pytest/config/compat.py b/contrib/python/pytest/py3/_pytest/config/compat.py
new file mode 100644
index 0000000000..5bd922a4a8
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/config/compat.py
@@ -0,0 +1,70 @@
+import functools
+import warnings
+from pathlib import Path
+from typing import Optional
+
+from ..compat import LEGACY_PATH
+from ..compat import legacy_path
+from ..deprecated import HOOK_LEGACY_PATH_ARG
+from _pytest.nodes import _check_path
+
+# hookname: (Path, LEGACY_PATH)
+imply_paths_hooks = {
+    "pytest_ignore_collect": ("collection_path", "path"),
+    "pytest_collect_file": ("file_path", "path"),
+    "pytest_pycollect_makemodule": ("module_path", "path"),
+    "pytest_report_header": ("start_path", "startdir"),
+    "pytest_report_collectionfinish": ("start_path", "startdir"),
+}
+
+
+class PathAwareHookProxy:
+    """
+    this helper wraps around hook callers
+    until pluggy supports fixingcalls, this one will do
+
+    it currently doesn't return full hook caller proxies for fixed hooks,
+    this may have to be changed later depending on bugs
+    """
+
+    def __init__(self, hook_caller):
+        self.__hook_caller = hook_caller
+
+    def __dir__(self):
+        return dir(self.__hook_caller)
+
+    def __getattr__(self, key, _wraps=functools.wraps):
+        hook = getattr(self.__hook_caller, key)
+        if key not in imply_paths_hooks:
+            self.__dict__[key] = hook
+            return hook
+        else:
+            path_var, fspath_var = imply_paths_hooks[key]
+
+            @_wraps(hook)
+            def fixed_hook(**kw):
+                path_value: Optional[Path] = kw.pop(path_var, None)
+                fspath_value: Optional[LEGACY_PATH] = kw.pop(fspath_var, None)
+                if fspath_value is not None:
+                    warnings.warn(
+                        HOOK_LEGACY_PATH_ARG.format(
+                            pylib_path_arg=fspath_var, pathlib_path_arg=path_var
+                        ),
+                        stacklevel=2,
+                    )
+                if path_value is not None:
+                    if fspath_value is not None:
+                        _check_path(path_value, fspath_value)
+                    else:
+                        fspath_value = legacy_path(path_value)
+                else:
+                    assert fspath_value is not None
+                    path_value = Path(fspath_value)
+
+                kw[path_var] = path_value
+                kw[fspath_var] = fspath_value
+                return hook(**kw)
+
+            fixed_hook.__name__ = key
+            self.__dict__[key] = fixed_hook
+            return fixed_hook
diff --git a/contrib/python/pytest/py3/_pytest/config/exceptions.py b/contrib/python/pytest/py3/_pytest/config/exceptions.py
new file mode 100644
index 0000000000..4f1320e758
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/config/exceptions.py
@@ -0,0 +1,11 @@
+from _pytest.compat import final
+
+
+@final
+class UsageError(Exception):
+    """Error in pytest usage or invocation."""
+
+
+class PrintHelp(Exception):
+    """Raised when pytest should print its help to skip the rest of the
+    argument parsing and validation."""
diff --git a/contrib/python/pytest/py3/_pytest/config/findpaths.py b/contrib/python/pytest/py3/_pytest/config/findpaths.py
new file mode 100644
index 0000000000..02674ffae3
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/config/findpaths.py
@@ -0,0 +1,218 @@
+import os
+import sys
+from pathlib import Path
+from typing import Dict
+from typing import Iterable
+from typing import List
+from typing import Optional
+from typing import Sequence
+from typing import Tuple
+from typing import TYPE_CHECKING
+from typing import Union
+
+import iniconfig
+
+from .exceptions import UsageError
+from _pytest.outcomes import fail
+from _pytest.pathlib import absolutepath
+from _pytest.pathlib import commonpath
+from _pytest.pathlib import safe_exists
+
+if TYPE_CHECKING:
+    from . import Config
+
+
+def _parse_ini_config(path: Path) -> iniconfig.IniConfig:
+    """Parse the given generic '.ini' file using legacy IniConfig parser, returning
+    the parsed object.
+
+    Raise UsageError if the file cannot be parsed.
+    """
+    try:
+        return iniconfig.IniConfig(str(path))
+    except iniconfig.ParseError as exc:
+        raise UsageError(str(exc)) from exc
+
+
+def load_config_dict_from_file(
+    filepath: Path,
+) -> Optional[Dict[str, Union[str, List[str]]]]:
+    """Load pytest configuration from the given file path, if supported.
+
+    Return None if the file does not contain valid pytest configuration.
+    """
+
+    # Configuration from ini files are obtained from the [pytest] section, if present.
+    if filepath.suffix == ".ini":
+        iniconfig = _parse_ini_config(filepath)
+
+        if "pytest" in iniconfig:
+            return dict(iniconfig["pytest"].items())
+        else:
+            # "pytest.ini" files are always the source of configuration, even if empty.
+            if filepath.name == "pytest.ini":
+                return {}
+
+    # '.cfg' files are considered if they contain a "[tool:pytest]" section.
+    elif filepath.suffix == ".cfg":
+        iniconfig = _parse_ini_config(filepath)
+
+        if "tool:pytest" in iniconfig.sections:
+            return dict(iniconfig["tool:pytest"].items())
+        elif "pytest" in iniconfig.sections:
+            # If a setup.cfg contains a "[pytest]" section, we raise a failure to indicate users that
+            # plain "[pytest]" sections in setup.cfg files is no longer supported (#3086).
+            fail(CFG_PYTEST_SECTION.format(filename="setup.cfg"), pytrace=False)
+
+    # '.toml' files are considered if they contain a [tool.pytest.ini_options] table.
+    elif filepath.suffix == ".toml":
+        if sys.version_info >= (3, 11):
+            import tomllib
+        else:
+            import tomli as tomllib
+
+        toml_text = filepath.read_text(encoding="utf-8")
+        try:
+            config = tomllib.loads(toml_text)
+        except tomllib.TOMLDecodeError as exc:
+            raise UsageError(f"{filepath}: {exc}") from exc
+
+        result = config.get("tool", {}).get("pytest", {}).get("ini_options", None)
+        if result is not None:
+            # TOML supports richer data types than ini files (strings, arrays, floats, ints, etc),
+            # however we need to convert all scalar values to str for compatibility with the rest
+            # of the configuration system, which expects strings only.
+            def make_scalar(v: object) -> Union[str, List[str]]:
+                return v if isinstance(v, list) else str(v)
+
+            return {k: make_scalar(v) for k, v in result.items()}
+
+    return None
+
+
+def locate_config(
+    args: Iterable[Path],
+) -> Tuple[Optional[Path], Optional[Path], Dict[str, Union[str, List[str]]]]:
+    """Search in the list of arguments for a valid ini-file for pytest,
+    and return a tuple of (rootdir, inifile, cfg-dict)."""
+    config_names = [
+        "pytest.ini",
+        ".pytest.ini",
+        "pyproject.toml",
+        "tox.ini",
+        "setup.cfg",
+    ]
+    args = [x for x in args if not str(x).startswith("-")]
+    if not args:
+        args = [Path.cwd()]
+    for arg in args:
+        argpath = absolutepath(arg)
+        for base in (argpath, *argpath.parents):
+            for config_name in config_names:
+                p = base / config_name
+                if p.is_file():
+                    ini_config = load_config_dict_from_file(p)
+                    if ini_config is not None:
+                        return base, p, ini_config
+    return None, None, {}
+
+
+def get_common_ancestor(paths: Iterable[Path]) -> Path:
+    common_ancestor: Optional[Path] = None
+    for path in paths:
+        if not path.exists():
+            continue
+        if common_ancestor is None:
+            common_ancestor = path
+        else:
+            if common_ancestor in path.parents or path == common_ancestor:
+                continue
+            elif path in common_ancestor.parents:
+                common_ancestor = path
+            else:
+                shared = commonpath(path, common_ancestor)
+                if shared is not None:
+                    common_ancestor = shared
+    if common_ancestor is None:
+        common_ancestor = Path.cwd()
+    elif common_ancestor.is_file():
+        common_ancestor = common_ancestor.parent
+    return common_ancestor
+
+
+def get_dirs_from_args(args: Iterable[str]) -> List[Path]:
+    def is_option(x: str) -> bool:
+        return x.startswith("-")
+
+    def get_file_part_from_node_id(x: str) -> str:
+        return x.split("::")[0]
+
+    def get_dir_from_path(path: Path) -> Path:
+        if path.is_dir():
+            return path
+        return path.parent
+
+    # These look like paths but may not exist
+    possible_paths = (
+        absolutepath(get_file_part_from_node_id(arg))
+        for arg in args
+        if not is_option(arg)
+    )
+
+    return [get_dir_from_path(path) for path in possible_paths if safe_exists(path)]
+
+
+CFG_PYTEST_SECTION = "[pytest] section in {filename} files is no longer supported, change to [tool:pytest] instead."
+
+
+def determine_setup(
+    inifile: Optional[str],
+    args: Sequence[str],
+    rootdir_cmd_arg: Optional[str] = None,
+    config: Optional["Config"] = None,
+) -> Tuple[Path, Optional[Path], Dict[str, Union[str, List[str]]]]:
+    rootdir = None
+    dirs = get_dirs_from_args(args)
+    if inifile:
+        inipath_ = absolutepath(inifile)
+        inipath: Optional[Path] = inipath_
+        inicfg = load_config_dict_from_file(inipath_) or {}
+        if rootdir_cmd_arg is None:
+            rootdir = inipath_.parent
+    else:
+        ancestor = get_common_ancestor(dirs)
+        rootdir, inipath, inicfg = locate_config([ancestor])
+        if rootdir is None and rootdir_cmd_arg is None:
+            for possible_rootdir in (ancestor, *ancestor.parents):
+                if (possible_rootdir / "setup.py").is_file():
+                    rootdir = possible_rootdir
+                    break
+            else:
+                if dirs != [ancestor]:
+                    rootdir, inipath, inicfg = locate_config(dirs)
+                if rootdir is None:
+                    if config is not None:
+                        cwd = config.invocation_params.dir
+                    else:
+                        cwd = Path.cwd()
+                    rootdir = get_common_ancestor([cwd, ancestor])
+                    if is_fs_root(rootdir):
+                        rootdir = ancestor
+    if rootdir_cmd_arg:
+        rootdir = absolutepath(os.path.expandvars(rootdir_cmd_arg))
+        if not rootdir.is_dir():
+            raise UsageError(
+                "Directory '{}' not found. Check your '--rootdir' option.".format(
+                    rootdir
+                )
+            )
+    assert rootdir is not None
+    return rootdir, inipath, inicfg or {}
+
+
+def is_fs_root(p: Path) -> bool:
+    r"""
+    Return True if the given path is pointing to the root of the
+    file system ("/" on Unix and "C:\\" on Windows for example).
+    """
+    return os.path.splitdrive(str(p))[1] == os.sep
diff --git a/contrib/python/pytest/py3/_pytest/debugging.py b/contrib/python/pytest/py3/_pytest/debugging.py
new file mode 100644
index 0000000000..21c8bcf3b0
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/debugging.py
@@ -0,0 +1,430 @@
+"""Interactive debugging with PDB, the Python Debugger."""
+import argparse
+import functools
+import os
+import sys
+import types
+import unittest
+from typing import Any
+from typing import Callable
+from typing import Generator
+from typing import List
+from typing import Optional
+from typing import Tuple
+from typing import Type
+from typing import TYPE_CHECKING
+from typing import Union
+
+from _pytest import outcomes
+from _pytest._code import ExceptionInfo
+from _pytest.config import Config
+from _pytest.config import ConftestImportFailure
+from _pytest.config import hookimpl
+from _pytest.config import PytestPluginManager
+from _pytest.config.argparsing import Parser
+from _pytest.config.exceptions import UsageError
+from _pytest.nodes import Node
+from _pytest.reports import BaseReport
+
+if TYPE_CHECKING:
+    from _pytest.capture import CaptureManager
+    from _pytest.runner import CallInfo
+
+
+def import_readline():
+    try:
+        import readline
+    except ImportError:
+        sys.path.append('/usr/lib/python2.7/lib-dynload')
+
+    try:
+        import readline
+    except ImportError as e:
+        print('can not import readline:', e)
+
+        import subprocess
+        try:
+            subprocess.check_call('stty icrnl'.split())
+        except OSError as e:
+            print('can not restore Enter, use Control+J:', e)
+
+
+def tty():
+    if os.isatty(1):
+        return
+
+    fd = os.open('/dev/tty', os.O_RDWR)
+    os.dup2(fd, 0)
+    os.dup2(fd, 1)
+    os.dup2(fd, 2)
+    os.close(fd)
+
+    old_sys_path = sys.path
+    sys.path = list(sys.path)
+    try:
+        import_readline()
+    finally:
+        sys.path = old_sys_path
+
+
+def _validate_usepdb_cls(value: str) -> Tuple[str, str]:
+    """Validate syntax of --pdbcls option."""
+    try:
+        modname, classname = value.split(":")
+    except ValueError as e:
+        raise argparse.ArgumentTypeError(
+            f"{value!r} is not in the format 'modname:classname'"
+        ) from e
+    return (modname, classname)
+
+
+def pytest_addoption(parser: Parser) -> None:
+    group = parser.getgroup("general")
+    group._addoption(
+        "--pdb",
+        dest="usepdb",
+        action="store_true",
+        help="Start the interactive Python debugger on errors or KeyboardInterrupt",
+    )
+    group._addoption(
+        "--pdbcls",
+        dest="usepdb_cls",
+        metavar="modulename:classname",
+        type=_validate_usepdb_cls,
+        help="Specify a custom interactive Python debugger for use with --pdb."
+        "For example: --pdbcls=IPython.terminal.debugger:TerminalPdb",
+    )
+    group._addoption(
+        "--trace",
+        dest="trace",
+        action="store_true",
+        help="Immediately break when running each test",
+    )
+
+
+def pytest_configure(config: Config) -> None:
+    import pdb
+
+    if config.getvalue("trace"):
+        config.pluginmanager.register(PdbTrace(), "pdbtrace")
+    if config.getvalue("usepdb"):
+        config.pluginmanager.register(PdbInvoke(), "pdbinvoke")
+
+    pytestPDB._saved.append(
+        (pdb.set_trace, pytestPDB._pluginmanager, pytestPDB._config)
+    )
+    pdb.set_trace = pytestPDB.set_trace
+    pytestPDB._pluginmanager = config.pluginmanager
+    pytestPDB._config = config
+
+    # NOTE: not using pytest_unconfigure, since it might get called although
+    #       pytest_configure was not (if another plugin raises UsageError).
+    def fin() -> None:
+        (
+            pdb.set_trace,
+            pytestPDB._pluginmanager,
+            pytestPDB._config,
+        ) = pytestPDB._saved.pop()
+
+    config.add_cleanup(fin)
+
+
+class pytestPDB:
+    """Pseudo PDB that defers to the real pdb."""
+
+    _pluginmanager: Optional[PytestPluginManager] = None
+    _config: Optional[Config] = None
+    _saved: List[
+        Tuple[Callable[..., None], Optional[PytestPluginManager], Optional[Config]]
+    ] = []
+    _recursive_debug = 0
+    _wrapped_pdb_cls: Optional[Tuple[Type[Any], Type[Any]]] = None
+
+    @classmethod
+    def _is_capturing(cls, capman: Optional["CaptureManager"]) -> Union[str, bool]:
+        if capman:
+            return capman.is_capturing()
+        return False
+
+    @classmethod
+    def _import_pdb_cls(cls, capman: Optional["CaptureManager"]):
+        if not cls._config:
+            import pdb
+
+            # Happens when using pytest.set_trace outside of a test.
+            return pdb.Pdb
+
+        usepdb_cls = cls._config.getvalue("usepdb_cls")
+
+        if cls._wrapped_pdb_cls and cls._wrapped_pdb_cls[0] == usepdb_cls:
+            return cls._wrapped_pdb_cls[1]
+
+        if usepdb_cls:
+            modname, classname = usepdb_cls
+
+            try:
+                __import__(modname)
+                mod = sys.modules[modname]
+
+                # Handle --pdbcls=pdb:pdb.Pdb (useful e.g. with pdbpp).
+                parts = classname.split(".")
+                pdb_cls = getattr(mod, parts[0])
+                for part in parts[1:]:
+                    pdb_cls = getattr(pdb_cls, part)
+            except Exception as exc:
+                value = ":".join((modname, classname))
+                raise UsageError(
+                    f"--pdbcls: could not import {value!r}: {exc}"
+                ) from exc
+        else:
+            import pdb
+
+            pdb_cls = pdb.Pdb
+
+        wrapped_cls = cls._get_pdb_wrapper_class(pdb_cls, capman)
+        cls._wrapped_pdb_cls = (usepdb_cls, wrapped_cls)
+        return wrapped_cls
+
+    @classmethod
+    def _get_pdb_wrapper_class(cls, pdb_cls, capman: Optional["CaptureManager"]):
+        import _pytest.config
+
+        # Type ignored because mypy doesn't support "dynamic"
+        # inheritance like this.
+        class PytestPdbWrapper(pdb_cls):  # type: ignore[valid-type,misc]
+            _pytest_capman = capman
+            _continued = False
+
+            def do_debug(self, arg):
+                cls._recursive_debug += 1
+                ret = super().do_debug(arg)
+                cls._recursive_debug -= 1
+                return ret
+
+            def do_continue(self, arg):
+                ret = super().do_continue(arg)
+                if cls._recursive_debug == 0:
+                    assert cls._config is not None
+                    tw = _pytest.config.create_terminal_writer(cls._config)
+                    tw.line()
+
+                    capman = self._pytest_capman
+                    capturing = pytestPDB._is_capturing(capman)
+                    if capturing:
+                        if capturing == "global":
+                            tw.sep(">", "PDB continue (IO-capturing resumed)")
+                        else:
+                            tw.sep(
+                                ">",
+                                "PDB continue (IO-capturing resumed for %s)"
+                                % capturing,
+                            )
+                        assert capman is not None
+                        capman.resume()
+                    else:
+                        tw.sep(">", "PDB continue")
+                assert cls._pluginmanager is not None
+                cls._pluginmanager.hook.pytest_leave_pdb(config=cls._config, pdb=self)
+                self._continued = True
+                return ret
+
+            do_c = do_cont = do_continue
+
+            def do_quit(self, arg):
+                """Raise Exit outcome when quit command is used in pdb.
+
+                This is a bit of a hack - it would be better if BdbQuit
+                could be handled, but this would require to wrap the
+                whole pytest run, and adjust the report etc.
+                """
+                ret = super().do_quit(arg)
+
+                if cls._recursive_debug == 0:
+                    outcomes.exit("Quitting debugger")
+
+                return ret
+
+            do_q = do_quit
+            do_exit = do_quit
+
+            def setup(self, f, tb):
+                """Suspend on setup().
+
+                Needed after do_continue resumed, and entering another
+                breakpoint again.
+                """
+                ret = super().setup(f, tb)
+                if not ret and self._continued:
+                    # pdb.setup() returns True if the command wants to exit
+                    # from the interaction: do not suspend capturing then.
+                    if self._pytest_capman:
+                        self._pytest_capman.suspend_global_capture(in_=True)
+                return ret
+
+            def get_stack(self, f, t):
+                stack, i = super().get_stack(f, t)
+                if f is None:
+                    # Find last non-hidden frame.
+                    i = max(0, len(stack) - 1)
+                    while i and stack[i][0].f_locals.get("__tracebackhide__", False):
+                        i -= 1
+                return stack, i
+
+        return PytestPdbWrapper
+
+    @classmethod
+    def _init_pdb(cls, method, *args, **kwargs):
+        """Initialize PDB debugging, dropping any IO capturing."""
+        import _pytest.config
+
+        if cls._pluginmanager is None:
+            capman: Optional[CaptureManager] = None
+        else:
+            capman = cls._pluginmanager.getplugin("capturemanager")
+        if capman:
+            capman.suspend(in_=True)
+
+        if cls._config:
+            tw = _pytest.config.create_terminal_writer(cls._config)
+            tw.line()
+
+            if cls._recursive_debug == 0:
+                # Handle header similar to pdb.set_trace in py37+.
+                header = kwargs.pop("header", None)
+                if header is not None:
+                    tw.sep(">", header)
+                else:
+                    capturing = cls._is_capturing(capman)
+                    if capturing == "global":
+                        tw.sep(">", f"PDB {method} (IO-capturing turned off)")
+                    elif capturing:
+                        tw.sep(
+                            ">",
+                            "PDB %s (IO-capturing turned off for %s)"
+                            % (method, capturing),
+                        )
+                    else:
+                        tw.sep(">", f"PDB {method}")
+
+        _pdb = cls._import_pdb_cls(capman)(**kwargs)
+
+        if cls._pluginmanager:
+            cls._pluginmanager.hook.pytest_enter_pdb(config=cls._config, pdb=_pdb)
+        return _pdb
+
+    @classmethod
+    def set_trace(cls, *args, **kwargs) -> None:
+        """Invoke debugging via ``Pdb.set_trace``, dropping any IO capturing."""
+        tty()
+        frame = sys._getframe().f_back
+        _pdb = cls._init_pdb("set_trace", *args, **kwargs)
+        _pdb.set_trace(frame)
+
+
+class PdbInvoke:
+    def pytest_exception_interact(
+        self, node: Node, call: "CallInfo[Any]", report: BaseReport
+    ) -> None:
+        capman = node.config.pluginmanager.getplugin("capturemanager")
+        if capman:
+            capman.suspend_global_capture(in_=True)
+            out, err = capman.read_global_capture()
+            sys.stdout.write(out)
+            sys.stdout.write(err)
+        tty()
+        assert call.excinfo is not None
+
+        if not isinstance(call.excinfo.value, unittest.SkipTest):
+            _enter_pdb(node, call.excinfo, report)
+
+    def pytest_internalerror(self, excinfo: ExceptionInfo[BaseException]) -> None:
+        tb = _postmortem_traceback(excinfo)
+        post_mortem(tb)
+
+
+class PdbTrace:
+    @hookimpl(hookwrapper=True)
+    def pytest_pyfunc_call(self, pyfuncitem) -> Generator[None, None, None]:
+        wrap_pytest_function_for_tracing(pyfuncitem)
+        yield
+
+
+def wrap_pytest_function_for_tracing(pyfuncitem):
+    """Change the Python function object of the given Function item by a
+    wrapper which actually enters pdb before calling the python function
+    itself, effectively leaving the user in the pdb prompt in the first
+    statement of the function."""
+    _pdb = pytestPDB._init_pdb("runcall")
+    testfunction = pyfuncitem.obj
+
+    # we can't just return `partial(pdb.runcall, testfunction)` because (on
+    # python < 3.7.4) runcall's first param is `func`, which means we'd get
+    # an exception if one of the kwargs to testfunction was called `func`.
+    @functools.wraps(testfunction)
+    def wrapper(*args, **kwargs):
+        func = functools.partial(testfunction, *args, **kwargs)
+        _pdb.runcall(func)
+
+    pyfuncitem.obj = wrapper
+
+
+def maybe_wrap_pytest_function_for_tracing(pyfuncitem):
+    """Wrap the given pytestfunct item for tracing support if --trace was given in
+    the command line."""
+    if pyfuncitem.config.getvalue("trace"):
+        wrap_pytest_function_for_tracing(pyfuncitem)
+
+
+def _enter_pdb(
+    node: Node, excinfo: ExceptionInfo[BaseException], rep: BaseReport
+) -> BaseReport:
+    # XXX we re-use the TerminalReporter's terminalwriter
+    # because this seems to avoid some encoding related troubles
+    # for not completely clear reasons.
+    tw = node.config.pluginmanager.getplugin("terminalreporter")._tw
+    tw.line()
+
+    showcapture = node.config.option.showcapture
+
+    for sectionname, content in (
+        ("stdout", rep.capstdout),
+        ("stderr", rep.capstderr),
+        ("log", rep.caplog),
+    ):
+        if showcapture in (sectionname, "all") and content:
+            tw.sep(">", "captured " + sectionname)
+            if content[-1:] == "\n":
+                content = content[:-1]
+            tw.line(content)
+
+    tw.sep(">", "traceback")
+    rep.toterminal(tw)
+    tw.sep(">", "entering PDB")
+    tb = _postmortem_traceback(excinfo)
+    rep._pdbshown = True  # type: ignore[attr-defined]
+    post_mortem(tb)
+    return rep
+
+
+def _postmortem_traceback(excinfo: ExceptionInfo[BaseException]) -> types.TracebackType:
+    from doctest import UnexpectedException
+
+    if isinstance(excinfo.value, UnexpectedException):
+        # A doctest.UnexpectedException is not useful for post_mortem.
+        # Use the underlying exception instead:
+        return excinfo.value.exc_info[2]
+    elif isinstance(excinfo.value, ConftestImportFailure):
+        # A config.ConftestImportFailure is not useful for post_mortem.
+        # Use the underlying exception instead:
+        return excinfo.value.excinfo[2]
+    else:
+        assert excinfo._excinfo is not None
+        return excinfo._excinfo[2]
+
+
+def post_mortem(t: types.TracebackType) -> None:
+    p = pytestPDB._init_pdb("post_mortem")
+    p.reset()
+    p.interaction(None, t)
+    if p.quitting:
+        outcomes.exit("Quitting debugger")
diff --git a/contrib/python/pytest/py3/_pytest/deprecated.py b/contrib/python/pytest/py3/_pytest/deprecated.py
new file mode 100644
index 0000000000..b9c10df7a0
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/deprecated.py
@@ -0,0 +1,146 @@
+"""Deprecation messages and bits of code used elsewhere in the codebase that
+is planned to be removed in the next pytest release.
+
+Keeping it in a central location makes it easy to track what is deprecated and should
+be removed when the time comes.
+
+All constants defined in this module should be either instances of
+:class:`PytestWarning`, or :class:`UnformattedWarning`
+in case of warnings which need to format their messages.
+"""
+from warnings import warn
+
+from _pytest.warning_types import PytestDeprecationWarning
+from _pytest.warning_types import PytestRemovedIn8Warning
+from _pytest.warning_types import UnformattedWarning
+
+# set of plugins which have been integrated into the core; we use this list to ignore
+# them during registration to avoid conflicts
+DEPRECATED_EXTERNAL_PLUGINS = {
+    "pytest_catchlog",
+    "pytest_capturelog",
+    "pytest_faulthandler",
+}
+
+NOSE_SUPPORT = UnformattedWarning(
+    PytestRemovedIn8Warning,
+    "Support for nose tests is deprecated and will be removed in a future release.\n"
+    "{nodeid} is using nose method: `{method}` ({stage})\n"
+    "See docs: https://docs.pytest.org/en/stable/deprecations.html#support-for-tests-written-for-nose",
+)
+
+NOSE_SUPPORT_METHOD = UnformattedWarning(
+    PytestRemovedIn8Warning,
+    "Support for nose tests is deprecated and will be removed in a future release.\n"
+    "{nodeid} is using nose-specific method: `{method}(self)`\n"
+    "To remove this warning, rename it to `{method}_method(self)`\n"
+    "See docs: https://docs.pytest.org/en/stable/deprecations.html#support-for-tests-written-for-nose",
+)
+
+
+# This can be* removed pytest 8, but it's harmless and common, so no rush to remove.
+# * If you're in the future: "could have been".
+YIELD_FIXTURE = PytestDeprecationWarning(
+    "@pytest.yield_fixture is deprecated.\n"
+    "Use @pytest.fixture instead; they are the same."
+)
+
+WARNING_CMDLINE_PREPARSE_HOOK = PytestRemovedIn8Warning(
+    "The pytest_cmdline_preparse hook is deprecated and will be removed in a future release. \n"
+    "Please use pytest_load_initial_conftests hook instead."
+)
+
+FSCOLLECTOR_GETHOOKPROXY_ISINITPATH = PytestRemovedIn8Warning(
+    "The gethookproxy() and isinitpath() methods of FSCollector and Package are deprecated; "
+    "use self.session.gethookproxy() and self.session.isinitpath() instead. "
+)
+
+STRICT_OPTION = PytestRemovedIn8Warning(
+    "The --strict option is deprecated, use --strict-markers instead."
+)
+
+# This deprecation is never really meant to be removed.
+PRIVATE = PytestDeprecationWarning("A private pytest class or function was used.")
+
+ARGUMENT_PERCENT_DEFAULT = PytestRemovedIn8Warning(
+    'pytest now uses argparse. "%default" should be changed to "%(default)s"',
+)
+
+ARGUMENT_TYPE_STR_CHOICE = UnformattedWarning(
+    PytestRemovedIn8Warning,
+    "`type` argument to addoption() is the string {typ!r}."
+    " For choices this is optional and can be omitted, "
+    " but when supplied should be a type (for example `str` or `int`)."
+    " (options: {names})",
+)
+
+ARGUMENT_TYPE_STR = UnformattedWarning(
+    PytestRemovedIn8Warning,
+    "`type` argument to addoption() is the string {typ!r}, "
+    " but when supplied should be a type (for example `str` or `int`)."
+    " (options: {names})",
+)
+
+
+HOOK_LEGACY_PATH_ARG = UnformattedWarning(
+    PytestRemovedIn8Warning,
+    "The ({pylib_path_arg}: py.path.local) argument is deprecated, please use ({pathlib_path_arg}: pathlib.Path)\n"
+    "see https://docs.pytest.org/en/latest/deprecations.html"
+    "#py-path-local-arguments-for-hooks-replaced-with-pathlib-path",
+)
+
+NODE_CTOR_FSPATH_ARG = UnformattedWarning(
+    PytestRemovedIn8Warning,
+    "The (fspath: py.path.local) argument to {node_type_name} is deprecated. "
+    "Please use the (path: pathlib.Path) argument instead.\n"
+    "See https://docs.pytest.org/en/latest/deprecations.html"
+    "#fspath-argument-for-node-constructors-replaced-with-pathlib-path",
+)
+
+WARNS_NONE_ARG = PytestRemovedIn8Warning(
+    "Passing None has been deprecated.\n"
+    "See https://docs.pytest.org/en/latest/how-to/capture-warnings.html"
+    "#additional-use-cases-of-warnings-in-tests"
+    " for alternatives in common use cases."
+)
+
+KEYWORD_MSG_ARG = UnformattedWarning(
+    PytestRemovedIn8Warning,
+    "pytest.{func}(msg=...) is now deprecated, use pytest.{func}(reason=...) instead",
+)
+
+INSTANCE_COLLECTOR = PytestRemovedIn8Warning(
+    "The pytest.Instance collector type is deprecated and is no longer used. "
+    "See https://docs.pytest.org/en/latest/deprecations.html#the-pytest-instance-collector",
+)
+HOOK_LEGACY_MARKING = UnformattedWarning(
+    PytestDeprecationWarning,
+    "The hook{type} {fullname} uses old-style configuration options (marks or attributes).\n"
+    "Please use the pytest.hook{type}({hook_opts}) decorator instead\n"
+    " to configure the hooks.\n"
+    " See https://docs.pytest.org/en/latest/deprecations.html"
+    "#configuring-hook-specs-impls-using-markers",
+)
+
+# You want to make some `__init__` or function "private".
+#
+#   def my_private_function(some, args):
+#       ...
+#
+# Do this:
+#
+#   def my_private_function(some, args, *, _ispytest: bool = False):
+#       check_ispytest(_ispytest)
+#       ...
+#
+# Change all internal/allowed calls to
+#
+#   my_private_function(some, args, _ispytest=True)
+#
+# All other calls will get the default _ispytest=False and trigger
+# the warning (possibly error in the future).
+
+
+def check_ispytest(ispytest: bool) -> None:
+    if not ispytest:
+        warn(PRIVATE, stacklevel=3)
diff --git a/contrib/python/pytest/py3/_pytest/doctest.py b/contrib/python/pytest/py3/_pytest/doctest.py
new file mode 100644
index 0000000000..ca41a98ea9
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/doctest.py
@@ -0,0 +1,771 @@
+"""Discover and run doctests in modules and test files."""
+import bdb
+import functools
+import inspect
+import os
+import platform
+import sys
+import traceback
+import types
+import warnings
+from contextlib import contextmanager
+from pathlib import Path
+from typing import Any
+from typing import Callable
+from typing import Dict
+from typing import Generator
+from typing import Iterable
+from typing import List
+from typing import Optional
+from typing import Pattern
+from typing import Sequence
+from typing import Tuple
+from typing import Type
+from typing import TYPE_CHECKING
+from typing import Union
+
+from _pytest import outcomes
+from _pytest._code.code import ExceptionInfo
+from _pytest._code.code import ReprFileLocation
+from _pytest._code.code import TerminalRepr
+from _pytest._io import TerminalWriter
+from _pytest.compat import safe_getattr
+from _pytest.config import Config
+from _pytest.config.argparsing import Parser
+from _pytest.fixtures import fixture
+from _pytest.fixtures import FixtureRequest
+from _pytest.nodes import Collector
+from _pytest.nodes import Item
+from _pytest.outcomes import OutcomeException
+from _pytest.outcomes import skip
+from _pytest.pathlib import fnmatch_ex
+from _pytest.pathlib import import_path
+from _pytest.python import Module
+from _pytest.python_api import approx
+from _pytest.warning_types import PytestWarning
+
+if TYPE_CHECKING:
+    import doctest
+
+DOCTEST_REPORT_CHOICE_NONE = "none"
+DOCTEST_REPORT_CHOICE_CDIFF = "cdiff"
+DOCTEST_REPORT_CHOICE_NDIFF = "ndiff"
+DOCTEST_REPORT_CHOICE_UDIFF = "udiff"
+DOCTEST_REPORT_CHOICE_ONLY_FIRST_FAILURE = "only_first_failure"
+
+DOCTEST_REPORT_CHOICES = (
+    DOCTEST_REPORT_CHOICE_NONE,
+    DOCTEST_REPORT_CHOICE_CDIFF,
+    DOCTEST_REPORT_CHOICE_NDIFF,
+    DOCTEST_REPORT_CHOICE_UDIFF,
+    DOCTEST_REPORT_CHOICE_ONLY_FIRST_FAILURE,
+)
+
+# Lazy definition of runner class
+RUNNER_CLASS = None
+# Lazy definition of output checker class
+CHECKER_CLASS: Optional[Type["doctest.OutputChecker"]] = None
+
+
+def pytest_addoption(parser: Parser) -> None:
+    parser.addini(
+        "doctest_optionflags",
+        "Option flags for doctests",
+        type="args",
+        default=["ELLIPSIS"],
+    )
+    parser.addini(
+        "doctest_encoding", "Encoding used for doctest files", default="utf-8"
+    )
+    group = parser.getgroup("collect")
+    group.addoption(
+        "--doctest-modules",
+        action="store_true",
+        default=False,
+        help="Run doctests in all .py modules",
+        dest="doctestmodules",
+    )
+    group.addoption(
+        "--doctest-report",
+        type=str.lower,
+        default="udiff",
+        help="Choose another output format for diffs on doctest failure",
+        choices=DOCTEST_REPORT_CHOICES,
+        dest="doctestreport",
+    )
+    group.addoption(
+        "--doctest-glob",
+        action="append",
+        default=[],
+        metavar="pat",
+        help="Doctests file matching pattern, default: test*.txt",
+        dest="doctestglob",
+    )
+    group.addoption(
+        "--doctest-ignore-import-errors",
+        action="store_true",
+        default=False,
+        help="Ignore doctest ImportErrors",
+        dest="doctest_ignore_import_errors",
+    )
+    group.addoption(
+        "--doctest-continue-on-failure",
+        action="store_true",
+        default=False,
+        help="For a given doctest, continue to run after the first failure",
+        dest="doctest_continue_on_failure",
+    )
+
+
+def pytest_unconfigure() -> None:
+    global RUNNER_CLASS
+
+    RUNNER_CLASS = None
+
+
+def pytest_collect_file(
+    file_path: Path,
+    parent: Collector,
+) -> Optional[Union["DoctestModule", "DoctestTextfile"]]:
+    config = parent.config
+    if file_path.suffix == ".py":
+        if config.option.doctestmodules and not any(
+            (_is_setup_py(file_path), _is_main_py(file_path))
+        ):
+            mod: DoctestModule = DoctestModule.from_parent(parent, path=file_path)
+            return mod
+    elif _is_doctest(config, file_path, parent):
+        txt: DoctestTextfile = DoctestTextfile.from_parent(parent, path=file_path)
+        return txt
+    return None
+
+
+def _is_setup_py(path: Path) -> bool:
+    if path.name != "setup.py":
+        return False
+    contents = path.read_bytes()
+    return b"setuptools" in contents or b"distutils" in contents
+
+
+def _is_doctest(config: Config, path: Path, parent: Collector) -> bool:
+    if path.suffix in (".txt", ".rst") and parent.session.isinitpath(path):
+        return True
+    globs = config.getoption("doctestglob") or ["test*.txt"]
+    return any(fnmatch_ex(glob, path) for glob in globs)
+
+
+def _is_main_py(path: Path) -> bool:
+    return path.name == "__main__.py"
+
+
+class ReprFailDoctest(TerminalRepr):
+    def __init__(
+        self, reprlocation_lines: Sequence[Tuple[ReprFileLocation, Sequence[str]]]
+    ) -> None:
+        self.reprlocation_lines = reprlocation_lines
+
+    def toterminal(self, tw: TerminalWriter) -> None:
+        for reprlocation, lines in self.reprlocation_lines:
+            for line in lines:
+                tw.line(line)
+            reprlocation.toterminal(tw)
+
+
+class MultipleDoctestFailures(Exception):
+    def __init__(self, failures: Sequence["doctest.DocTestFailure"]) -> None:
+        super().__init__()
+        self.failures = failures
+
+
+def _init_runner_class() -> Type["doctest.DocTestRunner"]:
+    import doctest
+
+    class PytestDoctestRunner(doctest.DebugRunner):
+        """Runner to collect failures.
+
+        Note that the out variable in this case is a list instead of a
+        stdout-like object.
+        """
+
+        def __init__(
+            self,
+            checker: Optional["doctest.OutputChecker"] = None,
+            verbose: Optional[bool] = None,
+            optionflags: int = 0,
+            continue_on_failure: bool = True,
+        ) -> None:
+            super().__init__(checker=checker, verbose=verbose, optionflags=optionflags)
+            self.continue_on_failure = continue_on_failure
+
+        def report_failure(
+            self,
+            out,
+            test: "doctest.DocTest",
+            example: "doctest.Example",
+            got: str,
+        ) -> None:
+            failure = doctest.DocTestFailure(test, example, got)
+            if self.continue_on_failure:
+                out.append(failure)
+            else:
+                raise failure
+
+        def report_unexpected_exception(
+            self,
+            out,
+            test: "doctest.DocTest",
+            example: "doctest.Example",
+            exc_info: Tuple[Type[BaseException], BaseException, types.TracebackType],
+        ) -> None:
+            if isinstance(exc_info[1], OutcomeException):
+                raise exc_info[1]
+            if isinstance(exc_info[1], bdb.BdbQuit):
+                outcomes.exit("Quitting debugger")
+            failure = doctest.UnexpectedException(test, example, exc_info)
+            if self.continue_on_failure:
+                out.append(failure)
+            else:
+                raise failure
+
+    return PytestDoctestRunner
+
+
+def _get_runner(
+    checker: Optional["doctest.OutputChecker"] = None,
+    verbose: Optional[bool] = None,
+    optionflags: int = 0,
+    continue_on_failure: bool = True,
+) -> "doctest.DocTestRunner":
+    # We need this in order to do a lazy import on doctest
+    global RUNNER_CLASS
+    if RUNNER_CLASS is None:
+        RUNNER_CLASS = _init_runner_class()
+    # Type ignored because the continue_on_failure argument is only defined on
+    # PytestDoctestRunner, which is lazily defined so can't be used as a type.
+    return RUNNER_CLASS(  # type: ignore
+        checker=checker,
+        verbose=verbose,
+        optionflags=optionflags,
+        continue_on_failure=continue_on_failure,
+    )
+
+
+class DoctestItem(Item):
+    def __init__(
+        self,
+        name: str,
+        parent: "Union[DoctestTextfile, DoctestModule]",
+        runner: Optional["doctest.DocTestRunner"] = None,
+        dtest: Optional["doctest.DocTest"] = None,
+    ) -> None:
+        super().__init__(name, parent)
+        self.runner = runner
+        self.dtest = dtest
+        self.obj = None
+        self.fixture_request: Optional[FixtureRequest] = None
+
+    @classmethod
+    def from_parent(  # type: ignore
+        cls,
+        parent: "Union[DoctestTextfile, DoctestModule]",
+        *,
+        name: str,
+        runner: "doctest.DocTestRunner",
+        dtest: "doctest.DocTest",
+    ):
+        # incompatible signature due to imposed limits on subclass
+        """The public named constructor."""
+        return super().from_parent(name=name, parent=parent, runner=runner, dtest=dtest)
+
+    def setup(self) -> None:
+        if self.dtest is not None:
+            self.fixture_request = _setup_fixtures(self)
+            globs = dict(getfixture=self.fixture_request.getfixturevalue)
+            for name, value in self.fixture_request.getfixturevalue(
+                "doctest_namespace"
+            ).items():
+                globs[name] = value
+            self.dtest.globs.update(globs)
+
+    def runtest(self) -> None:
+        assert self.dtest is not None
+        assert self.runner is not None
+        _check_all_skipped(self.dtest)
+        self._disable_output_capturing_for_darwin()
+        failures: List["doctest.DocTestFailure"] = []
+        # Type ignored because we change the type of `out` from what
+        # doctest expects.
+        self.runner.run(self.dtest, out=failures)  # type: ignore[arg-type]
+        if failures:
+            raise MultipleDoctestFailures(failures)
+
+    def _disable_output_capturing_for_darwin(self) -> None:
+        """Disable output capturing. Otherwise, stdout is lost to doctest (#985)."""
+        if platform.system() != "Darwin":
+            return
+        capman = self.config.pluginmanager.getplugin("capturemanager")
+        if capman:
+            capman.suspend_global_capture(in_=True)
+            out, err = capman.read_global_capture()
+            sys.stdout.write(out)
+            sys.stderr.write(err)
+
+    # TODO: Type ignored -- breaks Liskov Substitution.
+    def repr_failure(  # type: ignore[override]
+        self,
+        excinfo: ExceptionInfo[BaseException],
+    ) -> Union[str, TerminalRepr]:
+        import doctest
+
+        failures: Optional[
+            Sequence[Union[doctest.DocTestFailure, doctest.UnexpectedException]]
+        ] = None
+        if isinstance(
+            excinfo.value, (doctest.DocTestFailure, doctest.UnexpectedException)
+        ):
+            failures = [excinfo.value]
+        elif isinstance(excinfo.value, MultipleDoctestFailures):
+            failures = excinfo.value.failures
+
+        if failures is None:
+            return super().repr_failure(excinfo)
+
+        reprlocation_lines = []
+        for failure in failures:
+            example = failure.example
+            test = failure.test
+            filename = test.filename
+            if test.lineno is None:
+                lineno = None
+            else:
+                lineno = test.lineno + example.lineno + 1
+            message = type(failure).__name__
+            # TODO: ReprFileLocation doesn't expect a None lineno.
+            reprlocation = ReprFileLocation(filename, lineno, message)  # type: ignore[arg-type]
+            checker = _get_checker()
+            report_choice = _get_report_choice(self.config.getoption("doctestreport"))
+            if lineno is not None:
+                assert failure.test.docstring is not None
+                lines = failure.test.docstring.splitlines(False)
+                # add line numbers to the left of the error message
+                assert test.lineno is not None
+                lines = [
+                    "%03d %s" % (i + test.lineno + 1, x) for (i, x) in enumerate(lines)
+                ]
+                # trim docstring error lines to 10
+                lines = lines[max(example.lineno - 9, 0) : example.lineno + 1]
+            else:
+                lines = [
+                    "EXAMPLE LOCATION UNKNOWN, not showing all tests of that example"
+                ]
+                indent = ">>>"
+                for line in example.source.splitlines():
+                    lines.append(f"??? {indent} {line}")
+                    indent = "..."
+            if isinstance(failure, doctest.DocTestFailure):
+                lines += checker.output_difference(
+                    example, failure.got, report_choice
+                ).split("\n")
+            else:
+                inner_excinfo = ExceptionInfo.from_exc_info(failure.exc_info)
+                lines += ["UNEXPECTED EXCEPTION: %s" % repr(inner_excinfo.value)]
+                lines += [
+                    x.strip("\n") for x in traceback.format_exception(*failure.exc_info)
+                ]
+            reprlocation_lines.append((reprlocation, lines))
+        return ReprFailDoctest(reprlocation_lines)
+
+    def reportinfo(self) -> Tuple[Union["os.PathLike[str]", str], Optional[int], str]:
+        assert self.dtest is not None
+        return self.path, self.dtest.lineno, "[doctest] %s" % self.name
+
+
+def _get_flag_lookup() -> Dict[str, int]:
+    import doctest
+
+    return dict(
+        DONT_ACCEPT_TRUE_FOR_1=doctest.DONT_ACCEPT_TRUE_FOR_1,
+        DONT_ACCEPT_BLANKLINE=doctest.DONT_ACCEPT_BLANKLINE,
+        NORMALIZE_WHITESPACE=doctest.NORMALIZE_WHITESPACE,
+        ELLIPSIS=doctest.ELLIPSIS,
+        IGNORE_EXCEPTION_DETAIL=doctest.IGNORE_EXCEPTION_DETAIL,
+        COMPARISON_FLAGS=doctest.COMPARISON_FLAGS,
+        ALLOW_UNICODE=_get_allow_unicode_flag(),
+        ALLOW_BYTES=_get_allow_bytes_flag(),
+        NUMBER=_get_number_flag(),
+    )
+
+
+def get_optionflags(parent):
+    optionflags_str = parent.config.getini("doctest_optionflags")
+    flag_lookup_table = _get_flag_lookup()
+    flag_acc = 0
+    for flag in optionflags_str:
+        flag_acc |= flag_lookup_table[flag]
+    return flag_acc
+
+
+def _get_continue_on_failure(config):
+    continue_on_failure = config.getvalue("doctest_continue_on_failure")
+    if continue_on_failure:
+        # We need to turn off this if we use pdb since we should stop at
+        # the first failure.
+        if config.getvalue("usepdb"):
+            continue_on_failure = False
+    return continue_on_failure
+
+
+class DoctestTextfile(Module):
+    obj = None
+
+    def collect(self) -> Iterable[DoctestItem]:
+        import doctest
+
+        # Inspired by doctest.testfile; ideally we would use it directly,
+        # but it doesn't support passing a custom checker.
+        encoding = self.config.getini("doctest_encoding")
+        text = self.path.read_text(encoding)
+        filename = str(self.path)
+        name = self.path.name
+        globs = {"__name__": "__main__"}
+
+        optionflags = get_optionflags(self)
+
+        runner = _get_runner(
+            verbose=False,
+            optionflags=optionflags,
+            checker=_get_checker(),
+            continue_on_failure=_get_continue_on_failure(self.config),
+        )
+
+        parser = doctest.DocTestParser()
+        test = parser.get_doctest(text, globs, name, filename, 0)
+        if test.examples:
+            yield DoctestItem.from_parent(
+                self, name=test.name, runner=runner, dtest=test
+            )
+
+
+def _check_all_skipped(test: "doctest.DocTest") -> None:
+    """Raise pytest.skip() if all examples in the given DocTest have the SKIP
+    option set."""
+    import doctest
+
+    all_skipped = all(x.options.get(doctest.SKIP, False) for x in test.examples)
+    if all_skipped:
+        skip("all tests skipped by +SKIP option")
+
+
+def _is_mocked(obj: object) -> bool:
+    """Return if an object is possibly a mock object by checking the
+    existence of a highly improbable attribute."""
+    return (
+        safe_getattr(obj, "pytest_mock_example_attribute_that_shouldnt_exist", None)
+        is not None
+    )
+
+
+@contextmanager
+def _patch_unwrap_mock_aware() -> Generator[None, None, None]:
+    """Context manager which replaces ``inspect.unwrap`` with a version
+    that's aware of mock objects and doesn't recurse into them."""
+    real_unwrap = inspect.unwrap
+
+    def _mock_aware_unwrap(
+        func: Callable[..., Any], *, stop: Optional[Callable[[Any], Any]] = None
+    ) -> Any:
+        try:
+            if stop is None or stop is _is_mocked:
+                return real_unwrap(func, stop=_is_mocked)
+            _stop = stop
+            return real_unwrap(func, stop=lambda obj: _is_mocked(obj) or _stop(func))
+        except Exception as e:
+            warnings.warn(
+                "Got %r when unwrapping %r.  This is usually caused "
+                "by a violation of Python's object protocol; see e.g. "
+                "https://github.com/pytest-dev/pytest/issues/5080" % (e, func),
+                PytestWarning,
+            )
+            raise
+
+    inspect.unwrap = _mock_aware_unwrap
+    try:
+        yield
+    finally:
+        inspect.unwrap = real_unwrap
+
+
+class DoctestModule(Module):
+    def collect(self) -> Iterable[DoctestItem]:
+        import doctest
+
+        class MockAwareDocTestFinder(doctest.DocTestFinder):
+            """A hackish doctest finder that overrides stdlib internals to fix a stdlib bug.
+
+            https://github.com/pytest-dev/pytest/issues/3456
+            https://bugs.python.org/issue25532
+            """
+
+            def _find_lineno(self, obj, source_lines):
+                """Doctest code does not take into account `@property`, this
+                is a hackish way to fix it. https://bugs.python.org/issue17446
+
+                Wrapped Doctests will need to be unwrapped so the correct
+                line number is returned. This will be reported upstream. #8796
+                """
+                if isinstance(obj, property):
+                    obj = getattr(obj, "fget", obj)
+
+                if hasattr(obj, "__wrapped__"):
+                    # Get the main obj in case of it being wrapped
+                    obj = inspect.unwrap(obj)
+
+                # Type ignored because this is a private function.
+                return super()._find_lineno(  # type:ignore[misc]
+                    obj,
+                    source_lines,
+                )
+
+            def _find(
+                self, tests, obj, name, module, source_lines, globs, seen
+            ) -> None:
+                if _is_mocked(obj):
+                    return
+                with _patch_unwrap_mock_aware():
+                    # Type ignored because this is a private function.
+                    super()._find(  # type:ignore[misc]
+                        tests, obj, name, module, source_lines, globs, seen
+                    )
+
+            if sys.version_info < (3, 13):
+
+                def _from_module(self, module, object):
+                    """`cached_property` objects are never considered a part
+                    of the 'current module'. As such they are skipped by doctest.
+                    Here we override `_from_module` to check the underlying
+                    function instead. https://github.com/python/cpython/issues/107995
+                    """
+                    if hasattr(functools, "cached_property") and isinstance(
+                        object, functools.cached_property
+                    ):
+                        object = object.func
+
+                    # Type ignored because this is a private function.
+                    return super()._from_module(module, object)  # type: ignore[misc]
+
+            else:  # pragma: no cover
+                pass
+
+        if self.path.name == "conftest.py":
+            module = self.config.pluginmanager._importconftest(
+                self.path,
+                self.config.getoption("importmode"),
+                rootpath=self.config.rootpath,
+            )
+        else:
+            try:
+                module = import_path(
+                    self.path,
+                    root=self.config.rootpath,
+                    mode=self.config.getoption("importmode"),
+                )
+            except ImportError:
+                if self.config.getvalue("doctest_ignore_import_errors"):
+                    skip("unable to import module %r" % self.path)
+                else:
+                    raise
+        # Uses internal doctest module parsing mechanism.
+        finder = MockAwareDocTestFinder()
+        optionflags = get_optionflags(self)
+        runner = _get_runner(
+            verbose=False,
+            optionflags=optionflags,
+            checker=_get_checker(),
+            continue_on_failure=_get_continue_on_failure(self.config),
+        )
+
+        for test in finder.find(module, module.__name__):
+            if test.examples:  # skip empty doctests
+                yield DoctestItem.from_parent(
+                    self, name=test.name, runner=runner, dtest=test
+                )
+
+
+def _setup_fixtures(doctest_item: DoctestItem) -> FixtureRequest:
+    """Used by DoctestTextfile and DoctestItem to setup fixture information."""
+
+    def func() -> None:
+        pass
+
+    doctest_item.funcargs = {}  # type: ignore[attr-defined]
+    fm = doctest_item.session._fixturemanager
+    doctest_item._fixtureinfo = fm.getfixtureinfo(  # type: ignore[attr-defined]
+        node=doctest_item, func=func, cls=None, funcargs=False
+    )
+    fixture_request = FixtureRequest(doctest_item, _ispytest=True)
+    fixture_request._fillfixtures()
+    return fixture_request
+
+
+def _init_checker_class() -> Type["doctest.OutputChecker"]:
+    import doctest
+    import re
+
+    class LiteralsOutputChecker(doctest.OutputChecker):
+        # Based on doctest_nose_plugin.py from the nltk project
+        # (https://github.com/nltk/nltk) and on the "numtest" doctest extension
+        # by Sebastien Boisgerault (https://github.com/boisgera/numtest).
+
+        _unicode_literal_re = re.compile(r"(\W|^)[uU]([rR]?[\'\"])", re.UNICODE)
+        _bytes_literal_re = re.compile(r"(\W|^)[bB]([rR]?[\'\"])", re.UNICODE)
+        _number_re = re.compile(
+            r"""
+            (?P<number>
+              (?P<mantissa>
+                (?P<integer1> [+-]?\d*)\.(?P<fraction>\d+)
+                |
+                (?P<integer2> [+-]?\d+)\.
+              )
+              (?:
+                [Ee]
+                (?P<exponent1> [+-]?\d+)
+              )?
+              |
+              (?P<integer3> [+-]?\d+)
+              (?:
+                [Ee]
+                (?P<exponent2> [+-]?\d+)
+              )
+            )
+            """,
+            re.VERBOSE,
+        )
+
+        def check_output(self, want: str, got: str, optionflags: int) -> bool:
+            if super().check_output(want, got, optionflags):
+                return True
+
+            allow_unicode = optionflags & _get_allow_unicode_flag()
+            allow_bytes = optionflags & _get_allow_bytes_flag()
+            allow_number = optionflags & _get_number_flag()
+
+            if not allow_unicode and not allow_bytes and not allow_number:
+                return False
+
+            def remove_prefixes(regex: Pattern[str], txt: str) -> str:
+                return re.sub(regex, r"\1\2", txt)
+
+            if allow_unicode:
+                want = remove_prefixes(self._unicode_literal_re, want)
+                got = remove_prefixes(self._unicode_literal_re, got)
+
+            if allow_bytes:
+                want = remove_prefixes(self._bytes_literal_re, want)
+                got = remove_prefixes(self._bytes_literal_re, got)
+
+            if allow_number:
+                got = self._remove_unwanted_precision(want, got)
+
+            return super().check_output(want, got, optionflags)
+
+        def _remove_unwanted_precision(self, want: str, got: str) -> str:
+            wants = list(self._number_re.finditer(want))
+            gots = list(self._number_re.finditer(got))
+            if len(wants) != len(gots):
+                return got
+            offset = 0
+            for w, g in zip(wants, gots):
+                fraction: Optional[str] = w.group("fraction")
+                exponent: Optional[str] = w.group("exponent1")
+                if exponent is None:
+                    exponent = w.group("exponent2")
+                precision = 0 if fraction is None else len(fraction)
+                if exponent is not None:
+                    precision -= int(exponent)
+                if float(w.group()) == approx(float(g.group()), abs=10**-precision):
+                    # They're close enough. Replace the text we actually
+                    # got with the text we want, so that it will match when we
+                    # check the string literally.
+                    got = (
+                        got[: g.start() + offset] + w.group() + got[g.end() + offset :]
+                    )
+                    offset += w.end() - w.start() - (g.end() - g.start())
+            return got
+
+    return LiteralsOutputChecker
+
+
+def _get_checker() -> "doctest.OutputChecker":
+    """Return a doctest.OutputChecker subclass that supports some
+    additional options:
+
+    * ALLOW_UNICODE and ALLOW_BYTES options to ignore u'' and b''
+      prefixes (respectively) in string literals. Useful when the same
+      doctest should run in Python 2 and Python 3.
+
+    * NUMBER to ignore floating-point differences smaller than the
+      precision of the literal number in the doctest.
+
+    An inner class is used to avoid importing "doctest" at the module
+    level.
+    """
+    global CHECKER_CLASS
+    if CHECKER_CLASS is None:
+        CHECKER_CLASS = _init_checker_class()
+    return CHECKER_CLASS()
+
+
+def _get_allow_unicode_flag() -> int:
+    """Register and return the ALLOW_UNICODE flag."""
+    import doctest
+
+    return doctest.register_optionflag("ALLOW_UNICODE")
+
+
+def _get_allow_bytes_flag() -> int:
+    """Register and return the ALLOW_BYTES flag."""
+    import doctest
+
+    return doctest.register_optionflag("ALLOW_BYTES")
+
+
+def _get_number_flag() -> int:
+    """Register and return the NUMBER flag."""
+    import doctest
+
+    return doctest.register_optionflag("NUMBER")
+
+
+def _get_report_choice(key: str) -> int:
+    """Return the actual `doctest` module flag value.
+
+    We want to do it as late as possible to avoid importing `doctest` and all
+    its dependencies when parsing options, as it adds overhead and breaks tests.
+    """
+    import doctest
+
+    return {
+        DOCTEST_REPORT_CHOICE_UDIFF: doctest.REPORT_UDIFF,
+        DOCTEST_REPORT_CHOICE_CDIFF: doctest.REPORT_CDIFF,
+        DOCTEST_REPORT_CHOICE_NDIFF: doctest.REPORT_NDIFF,
+        DOCTEST_REPORT_CHOICE_ONLY_FIRST_FAILURE: doctest.REPORT_ONLY_FIRST_FAILURE,
+        DOCTEST_REPORT_CHOICE_NONE: 0,
+    }[key]
+
+
+@fixture(scope="session")
+def doctest_namespace() -> Dict[str, Any]:
+    """Fixture that returns a :py:class:`dict` that will be injected into the
+    namespace of doctests.
+
+    Usually this fixture is used in conjunction with another ``autouse`` fixture:
+
+    .. code-block:: python
+
+        @pytest.fixture(autouse=True)
+        def add_np(doctest_namespace):
+            doctest_namespace["np"] = numpy
+
+    For more details: :ref:`doctest_namespace`.
+    """
+    return dict()
diff --git a/contrib/python/pytest/py3/_pytest/faulthandler.py b/contrib/python/pytest/py3/_pytest/faulthandler.py
new file mode 100644
index 0000000000..af879aa44c
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/faulthandler.py
@@ -0,0 +1,95 @@
+import io
+import os
+import sys
+from typing import Generator
+
+import pytest
+from _pytest.config import Config
+from _pytest.config.argparsing import Parser
+from _pytest.nodes import Item
+from _pytest.stash import StashKey
+
+
+fault_handler_stderr_fd_key = StashKey[int]()
+fault_handler_originally_enabled_key = StashKey[bool]()
+
+
+def pytest_addoption(parser: Parser) -> None:
+    help = (
+        "Dump the traceback of all threads if a test takes "
+        "more than TIMEOUT seconds to finish"
+    )
+    parser.addini("faulthandler_timeout", help, default=0.0)
+
+
+def pytest_configure(config: Config) -> None:
+    import faulthandler
+
+    config.stash[fault_handler_stderr_fd_key] = os.dup(get_stderr_fileno())
+    config.stash[fault_handler_originally_enabled_key] = faulthandler.is_enabled()
+    faulthandler.enable(file=config.stash[fault_handler_stderr_fd_key])
+
+
+def pytest_unconfigure(config: Config) -> None:
+    import faulthandler
+
+    faulthandler.disable()
+    # Close the dup file installed during pytest_configure.
+    if fault_handler_stderr_fd_key in config.stash:
+        os.close(config.stash[fault_handler_stderr_fd_key])
+        del config.stash[fault_handler_stderr_fd_key]
+    if config.stash.get(fault_handler_originally_enabled_key, False):
+        # Re-enable the faulthandler if it was originally enabled.
+        faulthandler.enable(file=get_stderr_fileno())
+
+
+def get_stderr_fileno() -> int:
+    try:
+        fileno = sys.stderr.fileno()
+        # The Twisted Logger will return an invalid file descriptor since it is not backed
+        # by an FD. So, let's also forward this to the same code path as with pytest-xdist.
+        if fileno == -1:
+            raise AttributeError()
+        return fileno
+    except (AttributeError, io.UnsupportedOperation):
+        # pytest-xdist monkeypatches sys.stderr with an object that is not an actual file.
+        # https://docs.python.org/3/library/faulthandler.html#issue-with-file-descriptors
+        # This is potentially dangerous, but the best we can do.
+        return sys.__stderr__.fileno()
+
+
+def get_timeout_config_value(config: Config) -> float:
+    return float(config.getini("faulthandler_timeout") or 0.0)
+
+
+@pytest.hookimpl(hookwrapper=True, trylast=True)
+def pytest_runtest_protocol(item: Item) -> Generator[None, None, None]:
+    timeout = get_timeout_config_value(item.config)
+    if timeout > 0:
+        import faulthandler
+
+        stderr = item.config.stash[fault_handler_stderr_fd_key]
+        faulthandler.dump_traceback_later(timeout, file=stderr)
+        try:
+            yield
+        finally:
+            faulthandler.cancel_dump_traceback_later()
+    else:
+        yield
+
+
+@pytest.hookimpl(tryfirst=True)
+def pytest_enter_pdb() -> None:
+    """Cancel any traceback dumping due to timeout before entering pdb."""
+    import faulthandler
+
+    faulthandler.cancel_dump_traceback_later()
+
+
+@pytest.hookimpl(tryfirst=True)
+def pytest_exception_interact() -> None:
+    """Cancel any traceback dumping due to an interactive exception being
+    raised."""
+    import faulthandler
+
+    faulthandler.cancel_dump_traceback_later()
diff --git a/contrib/python/pytest/py3/_pytest/fixtures.py b/contrib/python/pytest/py3/_pytest/fixtures.py
new file mode 100644
index 0000000000..0462504efa
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/fixtures.py
@@ -0,0 +1,1713 @@
+import dataclasses
+import functools
+import inspect
+import os
+import sys
+import warnings
+from collections import defaultdict
+from collections import deque
+from contextlib import suppress
+from pathlib import Path
+from types import TracebackType
+from typing import Any
+from typing import Callable
+from typing import cast
+from typing import Dict
+from typing import Generator
+from typing import Generic
+from typing import Iterable
+from typing import Iterator
+from typing import List
+from typing import MutableMapping
+from typing import NoReturn
+from typing import Optional
+from typing import Sequence
+from typing import Set
+from typing import Tuple
+from typing import Type
+from typing import TYPE_CHECKING
+from typing import TypeVar
+from typing import Union
+
+import _pytest
+from _pytest import nodes
+from _pytest._code import getfslineno
+from _pytest._code.code import FormattedExcinfo
+from _pytest._code.code import TerminalRepr
+from _pytest._io import TerminalWriter
+from _pytest.compat import _format_args
+from _pytest.compat import _PytestWrapper
+from _pytest.compat import assert_never
+from _pytest.compat import final
+from _pytest.compat import get_real_func
+from _pytest.compat import get_real_method
+from _pytest.compat import getfuncargnames
+from _pytest.compat import getimfunc
+from _pytest.compat import getlocation
+from _pytest.compat import is_generator
+from _pytest.compat import NOTSET
+from _pytest.compat import NotSetType
+from _pytest.compat import overload
+from _pytest.compat import safe_getattr
+from _pytest.config import _PluggyPlugin
+from _pytest.config import Config
+from _pytest.config.argparsing import Parser
+from _pytest.deprecated import check_ispytest
+from _pytest.deprecated import YIELD_FIXTURE
+from _pytest.mark import Mark
+from _pytest.mark import ParameterSet
+from _pytest.mark.structures import MarkDecorator
+from _pytest.outcomes import fail
+from _pytest.outcomes import skip
+from _pytest.outcomes import TEST_OUTCOME
+from _pytest.pathlib import absolutepath
+from _pytest.pathlib import bestrelpath
+from _pytest.scope import HIGH_SCOPES
+from _pytest.scope import Scope
+from _pytest.stash import StashKey
+
+
+if TYPE_CHECKING:
+    from typing import Deque
+
+    from _pytest.scope import _ScopeName
+    from _pytest.main import Session
+    from _pytest.python import CallSpec2
+    from _pytest.python import Metafunc
+
+
+# The value of the fixture -- return/yield of the fixture function (type variable).
+FixtureValue = TypeVar("FixtureValue")
+# The type of the fixture function (type variable).
+FixtureFunction = TypeVar("FixtureFunction", bound=Callable[..., object])
+# The type of a fixture function (type alias generic in fixture value).
+_FixtureFunc = Union[
+    Callable[..., FixtureValue], Callable[..., Generator[FixtureValue, None, None]]
+]
+# The type of FixtureDef.cached_result (type alias generic in fixture value).
+_FixtureCachedResult = Union[
+    Tuple[
+        # The result.
+        FixtureValue,
+        # Cache key.
+        object,
+        None,
+    ],
+    Tuple[
+        None,
+        # Cache key.
+        object,
+        # Exc info if raised.
+        Tuple[Type[BaseException], BaseException, TracebackType],
+    ],
+]
+
+
+@dataclasses.dataclass(frozen=True)
+class PseudoFixtureDef(Generic[FixtureValue]):
+    cached_result: "_FixtureCachedResult[FixtureValue]"
+    _scope: Scope
+
+
+def pytest_sessionstart(session: "Session") -> None:
+    session._fixturemanager = FixtureManager(session)
+
+
+def get_scope_package(
+    node: nodes.Item,
+    fixturedef: "FixtureDef[object]",
+) -> Optional[Union[nodes.Item, nodes.Collector]]:
+    from _pytest.python import Package
+
+    current: Optional[Union[nodes.Item, nodes.Collector]] = node
+    fixture_package_name = "{}/{}".format(fixturedef.baseid, "__init__.py")
+    while current and (
+        not isinstance(current, Package) or fixture_package_name != current.nodeid
+    ):
+        current = current.parent  # type: ignore[assignment]
+    if current is None:
+        return node.session
+    return current
+
+
+def get_scope_node(
+    node: nodes.Node, scope: Scope
+) -> Optional[Union[nodes.Item, nodes.Collector]]:
+    import _pytest.python
+
+    if scope is Scope.Function:
+        return node.getparent(nodes.Item)
+    elif scope is Scope.Class:
+        return node.getparent(_pytest.python.Class)
+    elif scope is Scope.Module:
+        return node.getparent(_pytest.python.Module)
+    elif scope is Scope.Package:
+        return node.getparent(_pytest.python.Package)
+    elif scope is Scope.Session:
+        return node.getparent(_pytest.main.Session)
+    else:
+        assert_never(scope)
+
+
+# Used for storing artificial fixturedefs for direct parametrization.
+name2pseudofixturedef_key = StashKey[Dict[str, "FixtureDef[Any]"]]()
+
+
+def add_funcarg_pseudo_fixture_def(
+    collector: nodes.Collector, metafunc: "Metafunc", fixturemanager: "FixtureManager"
+) -> None:
+    # This function will transform all collected calls to functions
+    # if they use direct funcargs (i.e. direct parametrization)
+    # because we want later test execution to be able to rely on
+    # an existing FixtureDef structure for all arguments.
+    # XXX we can probably avoid this algorithm  if we modify CallSpec2
+    # to directly care for creating the fixturedefs within its methods.
+    if not metafunc._calls[0].funcargs:
+        # This function call does not have direct parametrization.
+        return
+    # Collect funcargs of all callspecs into a list of values.
+    arg2params: Dict[str, List[object]] = {}
+    arg2scope: Dict[str, Scope] = {}
+    for callspec in metafunc._calls:
+        for argname, argvalue in callspec.funcargs.items():
+            assert argname not in callspec.params
+            callspec.params[argname] = argvalue
+            arg2params_list = arg2params.setdefault(argname, [])
+            callspec.indices[argname] = len(arg2params_list)
+            arg2params_list.append(argvalue)
+            if argname not in arg2scope:
+                scope = callspec._arg2scope.get(argname, Scope.Function)
+                arg2scope[argname] = scope
+        callspec.funcargs.clear()
+
+    # Register artificial FixtureDef's so that later at test execution
+    # time we can rely on a proper FixtureDef to exist for fixture setup.
+    arg2fixturedefs = metafunc._arg2fixturedefs
+    for argname, valuelist in arg2params.items():
+        # If we have a scope that is higher than function, we need
+        # to make sure we only ever create an according fixturedef on
+        # a per-scope basis. We thus store and cache the fixturedef on the
+        # node related to the scope.
+        scope = arg2scope[argname]
+        node = None
+        if scope is not Scope.Function:
+            node = get_scope_node(collector, scope)
+            if node is None:
+                assert scope is Scope.Class and isinstance(
+                    collector, _pytest.python.Module
+                )
+                # Use module-level collector for class-scope (for now).
+                node = collector
+        if node is None:
+            name2pseudofixturedef = None
+        else:
+            default: Dict[str, FixtureDef[Any]] = {}
+            name2pseudofixturedef = node.stash.setdefault(
+                name2pseudofixturedef_key, default
+            )
+        if name2pseudofixturedef is not None and argname in name2pseudofixturedef:
+            arg2fixturedefs[argname] = [name2pseudofixturedef[argname]]
+        else:
+            fixturedef = FixtureDef(
+                fixturemanager=fixturemanager,
+                baseid="",
+                argname=argname,
+                func=get_direct_param_fixture_func,
+                scope=arg2scope[argname],
+                params=valuelist,
+                unittest=False,
+                ids=None,
+            )
+            arg2fixturedefs[argname] = [fixturedef]
+            if name2pseudofixturedef is not None:
+                name2pseudofixturedef[argname] = fixturedef
+
+
+def getfixturemarker(obj: object) -> Optional["FixtureFunctionMarker"]:
+    """Return fixturemarker or None if it doesn't exist or raised
+    exceptions."""
+    return cast(
+        Optional[FixtureFunctionMarker],
+        safe_getattr(obj, "_pytestfixturefunction", None),
+    )
+
+
+# Parametrized fixture key, helper alias for code below.
+_Key = Tuple[object, ...]
+
+
+def get_parametrized_fixture_keys(item: nodes.Item, scope: Scope) -> Iterator[_Key]:
+    """Return list of keys for all parametrized arguments which match
+    the specified scope."""
+    assert scope is not Scope.Function
+    try:
+        callspec = item.callspec  # type: ignore[attr-defined]
+    except AttributeError:
+        pass
+    else:
+        cs: CallSpec2 = callspec
+        # cs.indices.items() is random order of argnames.  Need to
+        # sort this so that different calls to
+        # get_parametrized_fixture_keys will be deterministic.
+        for argname, param_index in sorted(cs.indices.items()):
+            if cs._arg2scope[argname] != scope:
+                continue
+            if scope is Scope.Session:
+                key: _Key = (argname, param_index)
+            elif scope is Scope.Package:
+                key = (argname, param_index, item.path.parent)
+            elif scope is Scope.Module:
+                key = (argname, param_index, item.path)
+            elif scope is Scope.Class:
+                item_cls = item.cls  # type: ignore[attr-defined]
+                key = (argname, param_index, item.path, item_cls)
+            else:
+                assert_never(scope)
+            yield key
+
+
+# Algorithm for sorting on a per-parametrized resource setup basis.
+# It is called for Session scope first and performs sorting
+# down to the lower scopes such as to minimize number of "high scope"
+# setups and teardowns.
+
+
+def reorder_items(items: Sequence[nodes.Item]) -> List[nodes.Item]:
+    argkeys_cache: Dict[Scope, Dict[nodes.Item, Dict[_Key, None]]] = {}
+    items_by_argkey: Dict[Scope, Dict[_Key, Deque[nodes.Item]]] = {}
+    for scope in HIGH_SCOPES:
+        d: Dict[nodes.Item, Dict[_Key, None]] = {}
+        argkeys_cache[scope] = d
+        item_d: Dict[_Key, Deque[nodes.Item]] = defaultdict(deque)
+        items_by_argkey[scope] = item_d
+        for item in items:
+            keys = dict.fromkeys(get_parametrized_fixture_keys(item, scope), None)
+            if keys:
+                d[item] = keys
+                for key in keys:
+                    item_d[key].append(item)
+    items_dict = dict.fromkeys(items, None)
+    return list(
+        reorder_items_atscope(items_dict, argkeys_cache, items_by_argkey, Scope.Session)
+    )
+
+
+def fix_cache_order(
+    item: nodes.Item,
+    argkeys_cache: Dict[Scope, Dict[nodes.Item, Dict[_Key, None]]],
+    items_by_argkey: Dict[Scope, Dict[_Key, "Deque[nodes.Item]"]],
+) -> None:
+    for scope in HIGH_SCOPES:
+        for key in argkeys_cache[scope].get(item, []):
+            items_by_argkey[scope][key].appendleft(item)
+
+
+def reorder_items_atscope(
+    items: Dict[nodes.Item, None],
+    argkeys_cache: Dict[Scope, Dict[nodes.Item, Dict[_Key, None]]],
+    items_by_argkey: Dict[Scope, Dict[_Key, "Deque[nodes.Item]"]],
+    scope: Scope,
+) -> Dict[nodes.Item, None]:
+    if scope is Scope.Function or len(items) < 3:
+        return items
+    ignore: Set[Optional[_Key]] = set()
+    items_deque = deque(items)
+    items_done: Dict[nodes.Item, None] = {}
+    scoped_items_by_argkey = items_by_argkey[scope]
+    scoped_argkeys_cache = argkeys_cache[scope]
+    while items_deque:
+        no_argkey_group: Dict[nodes.Item, None] = {}
+        slicing_argkey = None
+        while items_deque:
+            item = items_deque.popleft()
+            if item in items_done or item in no_argkey_group:
+                continue
+            argkeys = dict.fromkeys(
+                (k for k in scoped_argkeys_cache.get(item, []) if k not in ignore), None
+            )
+            if not argkeys:
+                no_argkey_group[item] = None
+            else:
+                slicing_argkey, _ = argkeys.popitem()
+                # We don't have to remove relevant items from later in the
+                # deque because they'll just be ignored.
+                matching_items = [
+                    i for i in scoped_items_by_argkey[slicing_argkey] if i in items
+                ]
+                for i in reversed(matching_items):
+                    fix_cache_order(i, argkeys_cache, items_by_argkey)
+                    items_deque.appendleft(i)
+                break
+        if no_argkey_group:
+            no_argkey_group = reorder_items_atscope(
+                no_argkey_group, argkeys_cache, items_by_argkey, scope.next_lower()
+            )
+            for item in no_argkey_group:
+                items_done[item] = None
+        ignore.add(slicing_argkey)
+    return items_done
+
+
+def get_direct_param_fixture_func(request: "FixtureRequest") -> Any:
+    return request.param
+
+
+@dataclasses.dataclass
+class FuncFixtureInfo:
+    __slots__ = ("argnames", "initialnames", "names_closure", "name2fixturedefs")
+
+    # Original function argument names.
+    argnames: Tuple[str, ...]
+    # Argnames that function immediately requires. These include argnames +
+    # fixture names specified via usefixtures and via autouse=True in fixture
+    # definitions.
+    initialnames: Tuple[str, ...]
+    names_closure: List[str]
+    name2fixturedefs: Dict[str, Sequence["FixtureDef[Any]"]]
+
+    def prune_dependency_tree(self) -> None:
+        """Recompute names_closure from initialnames and name2fixturedefs.
+
+        Can only reduce names_closure, which means that the new closure will
+        always be a subset of the old one. The order is preserved.
+
+        This method is needed because direct parametrization may shadow some
+        of the fixtures that were included in the originally built dependency
+        tree. In this way the dependency tree can get pruned, and the closure
+        of argnames may get reduced.
+        """
+        closure: Set[str] = set()
+        working_set = set(self.initialnames)
+        while working_set:
+            argname = working_set.pop()
+            # Argname may be smth not included in the original names_closure,
+            # in which case we ignore it. This currently happens with pseudo
+            # FixtureDefs which wrap 'get_direct_param_fixture_func(request)'.
+            # So they introduce the new dependency 'request' which might have
+            # been missing in the original tree (closure).
+            if argname not in closure and argname in self.names_closure:
+                closure.add(argname)
+                if argname in self.name2fixturedefs:
+                    working_set.update(self.name2fixturedefs[argname][-1].argnames)
+
+        self.names_closure[:] = sorted(closure, key=self.names_closure.index)
+
+
+class FixtureRequest:
+    """A request for a fixture from a test or fixture function.
+
+    A request object gives access to the requesting test context and has
+    an optional ``param`` attribute in case the fixture is parametrized
+    indirectly.
+    """
+
+    def __init__(self, pyfuncitem, *, _ispytest: bool = False) -> None:
+        check_ispytest(_ispytest)
+        self._pyfuncitem = pyfuncitem
+        #: Fixture for which this request is being performed.
+        self.fixturename: Optional[str] = None
+        self._scope = Scope.Function
+        self._fixture_defs: Dict[str, FixtureDef[Any]] = {}
+        fixtureinfo: FuncFixtureInfo = pyfuncitem._fixtureinfo
+        self._arg2fixturedefs = fixtureinfo.name2fixturedefs.copy()
+        self._arg2index: Dict[str, int] = {}
+        self._fixturemanager: FixtureManager = pyfuncitem.session._fixturemanager
+        # Notes on the type of `param`:
+        # -`request.param` is only defined in parametrized fixtures, and will raise
+        #   AttributeError otherwise. Python typing has no notion of "undefined", so
+        #   this cannot be reflected in the type.
+        # - Technically `param` is only (possibly) defined on SubRequest, not
+        #   FixtureRequest, but the typing of that is still in flux so this cheats.
+        # - In the future we might consider using a generic for the param type, but
+        #   for now just using Any.
+        self.param: Any
+
+    @property
+    def scope(self) -> "_ScopeName":
+        """Scope string, one of "function", "class", "module", "package", "session"."""
+        return self._scope.value
+
+    @property
+    def fixturenames(self) -> List[str]:
+        """Names of all active fixtures in this request."""
+        result = list(self._pyfuncitem._fixtureinfo.names_closure)
+        result.extend(set(self._fixture_defs).difference(result))
+        return result
+
+    @property
+    def node(self):
+        """Underlying collection node (depends on current request scope)."""
+        scope = self._scope
+        if scope is Scope.Function:
+            # This might also be a non-function Item despite its attribute name.
+            node: Optional[Union[nodes.Item, nodes.Collector]] = self._pyfuncitem
+        elif scope is Scope.Package:
+            # FIXME: _fixturedef is not defined on FixtureRequest (this class),
+            # but on FixtureRequest (a subclass).
+            node = get_scope_package(self._pyfuncitem, self._fixturedef)  # type: ignore[attr-defined]
+        else:
+            node = get_scope_node(self._pyfuncitem, scope)
+        if node is None and scope is Scope.Class:
+            # Fallback to function item itself.
+            node = self._pyfuncitem
+        assert node, 'Could not obtain a node for scope "{}" for function {!r}'.format(
+            scope, self._pyfuncitem
+        )
+        return node
+
+    def _getnextfixturedef(self, argname: str) -> "FixtureDef[Any]":
+        fixturedefs = self._arg2fixturedefs.get(argname, None)
+        if fixturedefs is None:
+            # We arrive here because of a dynamic call to
+            # getfixturevalue(argname) usage which was naturally
+            # not known at parsing/collection time.
+            assert self._pyfuncitem.parent is not None
+            parentid = self._pyfuncitem.parent.nodeid
+            fixturedefs = self._fixturemanager.getfixturedefs(argname, parentid)
+            # TODO: Fix this type ignore. Either add assert or adjust types.
+            #       Can this be None here?
+            self._arg2fixturedefs[argname] = fixturedefs  # type: ignore[assignment]
+        # fixturedefs list is immutable so we maintain a decreasing index.
+        index = self._arg2index.get(argname, 0) - 1
+        if fixturedefs is None or (-index > len(fixturedefs)):
+            raise FixtureLookupError(argname, self)
+        self._arg2index[argname] = index
+        return fixturedefs[index]
+
+    @property
+    def config(self) -> Config:
+        """The pytest config object associated with this request."""
+        return self._pyfuncitem.config  # type: ignore[no-any-return]
+
+    @property
+    def function(self):
+        """Test function object if the request has a per-function scope."""
+        if self.scope != "function":
+            raise AttributeError(
+                f"function not available in {self.scope}-scoped context"
+            )
+        return self._pyfuncitem.obj
+
+    @property
+    def cls(self):
+        """Class (can be None) where the test function was collected."""
+        if self.scope not in ("class", "function"):
+            raise AttributeError(f"cls not available in {self.scope}-scoped context")
+        clscol = self._pyfuncitem.getparent(_pytest.python.Class)
+        if clscol:
+            return clscol.obj
+
+    @property
+    def instance(self):
+        """Instance (can be None) on which test function was collected."""
+        # unittest support hack, see _pytest.unittest.TestCaseFunction.
+        try:
+            return self._pyfuncitem._testcase
+        except AttributeError:
+            function = getattr(self, "function", None)
+            return getattr(function, "__self__", None)
+
+    @property
+    def module(self):
+        """Python module object where the test function was collected."""
+        if self.scope not in ("function", "class", "module"):
+            raise AttributeError(f"module not available in {self.scope}-scoped context")
+        return self._pyfuncitem.getparent(_pytest.python.Module).obj
+
+    @property
+    def path(self) -> Path:
+        """Path where the test function was collected."""
+        if self.scope not in ("function", "class", "module", "package"):
+            raise AttributeError(f"path not available in {self.scope}-scoped context")
+        # TODO: Remove ignore once _pyfuncitem is properly typed.
+        return self._pyfuncitem.path  # type: ignore
+
+    @property
+    def keywords(self) -> MutableMapping[str, Any]:
+        """Keywords/markers dictionary for the underlying node."""
+        node: nodes.Node = self.node
+        return node.keywords
+
+    @property
+    def session(self) -> "Session":
+        """Pytest session object."""
+        return self._pyfuncitem.session  # type: ignore[no-any-return]
+
+    def addfinalizer(self, finalizer: Callable[[], object]) -> None:
+        """Add finalizer/teardown function to be called without arguments after
+        the last test within the requesting test context finished execution."""
+        # XXX usually this method is shadowed by fixturedef specific ones.
+        self.node.addfinalizer(finalizer)
+
+    def applymarker(self, marker: Union[str, MarkDecorator]) -> None:
+        """Apply a marker to a single test function invocation.
+
+        This method is useful if you don't want to have a keyword/marker
+        on all function invocations.
+
+        :param marker:
+            An object created by a call to ``pytest.mark.NAME(...)``.
+        """
+        self.node.add_marker(marker)
+
+    def raiseerror(self, msg: Optional[str]) -> NoReturn:
+        """Raise a FixtureLookupError exception.
+
+        :param msg:
+            An optional custom error message.
+        """
+        raise self._fixturemanager.FixtureLookupError(None, self, msg)
+
+    def _fillfixtures(self) -> None:
+        item = self._pyfuncitem
+        fixturenames = getattr(item, "fixturenames", self.fixturenames)
+        for argname in fixturenames:
+            if argname not in item.funcargs:
+                item.funcargs[argname] = self.getfixturevalue(argname)
+
+    def getfixturevalue(self, argname: str) -> Any:
+        """Dynamically run a named fixture function.
+
+        Declaring fixtures via function argument is recommended where possible.
+        But if you can only decide whether to use another fixture at test
+        setup time, you may use this function to retrieve it inside a fixture
+        or test function body.
+
+        This method can be used during the test setup phase or the test run
+        phase, but during the test teardown phase a fixture's value may not
+        be available.
+
+        :param argname:
+            The fixture name.
+        :raises pytest.FixtureLookupError:
+            If the given fixture could not be found.
+        """
+        fixturedef = self._get_active_fixturedef(argname)
+        assert fixturedef.cached_result is not None, (
+            f'The fixture value for "{argname}" is not available.  '
+            "This can happen when the fixture has already been torn down."
+        )
+        return fixturedef.cached_result[0]
+
+    def _get_active_fixturedef(
+        self, argname: str
+    ) -> Union["FixtureDef[object]", PseudoFixtureDef[object]]:
+        try:
+            return self._fixture_defs[argname]
+        except KeyError:
+            try:
+                fixturedef = self._getnextfixturedef(argname)
+            except FixtureLookupError:
+                if argname == "request":
+                    cached_result = (self, [0], None)
+                    return PseudoFixtureDef(cached_result, Scope.Function)
+                raise
+        # Remove indent to prevent the python3 exception
+        # from leaking into the call.
+        self._compute_fixture_value(fixturedef)
+        self._fixture_defs[argname] = fixturedef
+        return fixturedef
+
+    def _get_fixturestack(self) -> List["FixtureDef[Any]"]:
+        current = self
+        values: List[FixtureDef[Any]] = []
+        while isinstance(current, SubRequest):
+            values.append(current._fixturedef)  # type: ignore[has-type]
+            current = current._parent_request
+        values.reverse()
+        return values
+
+    def _compute_fixture_value(self, fixturedef: "FixtureDef[object]") -> None:
+        """Create a SubRequest based on "self" and call the execute method
+        of the given FixtureDef object.
+
+        This will force the FixtureDef object to throw away any previous
+        results and compute a new fixture value, which will be stored into
+        the FixtureDef object itself.
+        """
+        # prepare a subrequest object before calling fixture function
+        # (latter managed by fixturedef)
+        argname = fixturedef.argname
+        funcitem = self._pyfuncitem
+        scope = fixturedef._scope
+        try:
+            callspec = funcitem.callspec
+        except AttributeError:
+            callspec = None
+        if callspec is not None and argname in callspec.params:
+            param = callspec.params[argname]
+            param_index = callspec.indices[argname]
+            # If a parametrize invocation set a scope it will override
+            # the static scope defined with the fixture function.
+            with suppress(KeyError):
+                scope = callspec._arg2scope[argname]
+        else:
+            param = NOTSET
+            param_index = 0
+            has_params = fixturedef.params is not None
+            fixtures_not_supported = getattr(funcitem, "nofuncargs", False)
+            if has_params and fixtures_not_supported:
+                msg = (
+                    "{name} does not support fixtures, maybe unittest.TestCase subclass?\n"
+                    "Node id: {nodeid}\n"
+                    "Function type: {typename}"
+                ).format(
+                    name=funcitem.name,
+                    nodeid=funcitem.nodeid,
+                    typename=type(funcitem).__name__,
+                )
+                fail(msg, pytrace=False)
+            if has_params:
+                frame = inspect.stack()[3]
+                frameinfo = inspect.getframeinfo(frame[0])
+                source_path = absolutepath(frameinfo.filename)
+                source_lineno = frameinfo.lineno
+                try:
+                    source_path_str = str(
+                        source_path.relative_to(funcitem.config.rootpath)
+                    )
+                except ValueError:
+                    source_path_str = str(source_path)
+                msg = (
+                    "The requested fixture has no parameter defined for test:\n"
+                    "    {}\n\n"
+                    "Requested fixture '{}' defined in:\n{}"
+                    "\n\nRequested here:\n{}:{}".format(
+                        funcitem.nodeid,
+                        fixturedef.argname,
+                        getlocation(fixturedef.func, funcitem.config.rootpath),
+                        source_path_str,
+                        source_lineno,
+                    )
+                )
+                fail(msg, pytrace=False)
+
+        subrequest = SubRequest(
+            self, scope, param, param_index, fixturedef, _ispytest=True
+        )
+
+        # Check if a higher-level scoped fixture accesses a lower level one.
+        subrequest._check_scope(argname, self._scope, scope)
+        try:
+            # Call the fixture function.
+            fixturedef.execute(request=subrequest)
+        finally:
+            self._schedule_finalizers(fixturedef, subrequest)
+
+    def _schedule_finalizers(
+        self, fixturedef: "FixtureDef[object]", subrequest: "SubRequest"
+    ) -> None:
+        # If fixture function failed it might have registered finalizers.
+        subrequest.node.addfinalizer(lambda: fixturedef.finish(request=subrequest))
+
+    def _check_scope(
+        self,
+        argname: str,
+        invoking_scope: Scope,
+        requested_scope: Scope,
+    ) -> None:
+        if argname == "request":
+            return
+        if invoking_scope > requested_scope:
+            # Try to report something helpful.
+            text = "\n".join(self._factorytraceback())
+            fail(
+                f"ScopeMismatch: You tried to access the {requested_scope.value} scoped "
+                f"fixture {argname} with a {invoking_scope.value} scoped request object, "
+                f"involved factories:\n{text}",
+                pytrace=False,
+            )
+
+    def _factorytraceback(self) -> List[str]:
+        lines = []
+        for fixturedef in self._get_fixturestack():
+            factory = fixturedef.func
+            fs, lineno = getfslineno(factory)
+            if isinstance(fs, Path):
+                session: Session = self._pyfuncitem.session
+                p = bestrelpath(session.path, fs)
+            else:
+                p = fs
+            args = _format_args(factory)
+            lines.append("%s:%d:  def %s%s" % (p, lineno + 1, factory.__name__, args))
+        return lines
+
+    def __repr__(self) -> str:
+        return "<FixtureRequest for %r>" % (self.node)
+
+
+@final
+class SubRequest(FixtureRequest):
+    """A sub request for handling getting a fixture from a test function/fixture."""
+
+    def __init__(
+        self,
+        request: "FixtureRequest",
+        scope: Scope,
+        param: Any,
+        param_index: int,
+        fixturedef: "FixtureDef[object]",
+        *,
+        _ispytest: bool = False,
+    ) -> None:
+        check_ispytest(_ispytest)
+        self._parent_request = request
+        self.fixturename = fixturedef.argname
+        if param is not NOTSET:
+            self.param = param
+        self.param_index = param_index
+        self._scope = scope
+        self._fixturedef = fixturedef
+        self._pyfuncitem = request._pyfuncitem
+        self._fixture_defs = request._fixture_defs
+        self._arg2fixturedefs = request._arg2fixturedefs
+        self._arg2index = request._arg2index
+        self._fixturemanager = request._fixturemanager
+
+    def __repr__(self) -> str:
+        return f"<SubRequest {self.fixturename!r} for {self._pyfuncitem!r}>"
+
+    def addfinalizer(self, finalizer: Callable[[], object]) -> None:
+        """Add finalizer/teardown function to be called without arguments after
+        the last test within the requesting test context finished execution."""
+        self._fixturedef.addfinalizer(finalizer)
+
+    def _schedule_finalizers(
+        self, fixturedef: "FixtureDef[object]", subrequest: "SubRequest"
+    ) -> None:
+        # If the executing fixturedef was not explicitly requested in the argument list (via
+        # getfixturevalue inside the fixture call) then ensure this fixture def will be finished
+        # first.
+        if fixturedef.argname not in self.fixturenames:
+            fixturedef.addfinalizer(
+                functools.partial(self._fixturedef.finish, request=self)
+            )
+        super()._schedule_finalizers(fixturedef, subrequest)
+
+
+@final
+class FixtureLookupError(LookupError):
+    """Could not return a requested fixture (missing or invalid)."""
+
+    def __init__(
+        self, argname: Optional[str], request: FixtureRequest, msg: Optional[str] = None
+    ) -> None:
+        self.argname = argname
+        self.request = request
+        self.fixturestack = request._get_fixturestack()
+        self.msg = msg
+
+    def formatrepr(self) -> "FixtureLookupErrorRepr":
+        tblines: List[str] = []
+        addline = tblines.append
+        stack = [self.request._pyfuncitem.obj]
+        stack.extend(map(lambda x: x.func, self.fixturestack))
+        msg = self.msg
+        if msg is not None:
+            # The last fixture raise an error, let's present
+            # it at the requesting side.
+            stack = stack[:-1]
+        for function in stack:
+            fspath, lineno = getfslineno(function)
+            try:
+                lines, _ = inspect.getsourcelines(get_real_func(function))
+            except (OSError, IndexError, TypeError):
+                error_msg = "file %s, line %s: source code not available"
+                addline(error_msg % (fspath, lineno + 1))
+            else:
+                addline(f"file {fspath}, line {lineno + 1}")
+                for i, line in enumerate(lines):
+                    line = line.rstrip()
+                    addline("  " + line)
+                    if line.lstrip().startswith("def"):
+                        break
+
+        if msg is None:
+            fm = self.request._fixturemanager
+            available = set()
+            parentid = self.request._pyfuncitem.parent.nodeid
+            for name, fixturedefs in fm._arg2fixturedefs.items():
+                faclist = list(fm._matchfactories(fixturedefs, parentid))
+                if faclist:
+                    available.add(name)
+            if self.argname in available:
+                msg = " recursive dependency involving fixture '{}' detected".format(
+                    self.argname
+                )
+            else:
+                msg = f"fixture '{self.argname}' not found"
+            msg += "\n available fixtures: {}".format(", ".join(sorted(available)))
+            msg += "\n use 'pytest --fixtures [testpath]' for help on them."
+
+        return FixtureLookupErrorRepr(fspath, lineno, tblines, msg, self.argname)
+
+
+class FixtureLookupErrorRepr(TerminalRepr):
+    def __init__(
+        self,
+        filename: Union[str, "os.PathLike[str]"],
+        firstlineno: int,
+        tblines: Sequence[str],
+        errorstring: str,
+        argname: Optional[str],
+    ) -> None:
+        self.tblines = tblines
+        self.errorstring = errorstring
+        self.filename = filename
+        self.firstlineno = firstlineno
+        self.argname = argname
+
+    def toterminal(self, tw: TerminalWriter) -> None:
+        # tw.line("FixtureLookupError: %s" %(self.argname), red=True)
+        for tbline in self.tblines:
+            tw.line(tbline.rstrip())
+        lines = self.errorstring.split("\n")
+        if lines:
+            tw.line(
+                f"{FormattedExcinfo.fail_marker}       {lines[0].strip()}",
+                red=True,
+            )
+            for line in lines[1:]:
+                tw.line(
+                    f"{FormattedExcinfo.flow_marker}       {line.strip()}",
+                    red=True,
+                )
+        tw.line()
+        tw.line("%s:%d" % (os.fspath(self.filename), self.firstlineno + 1))
+
+
+def fail_fixturefunc(fixturefunc, msg: str) -> NoReturn:
+    fs, lineno = getfslineno(fixturefunc)
+    location = f"{fs}:{lineno + 1}"
+    source = _pytest._code.Source(fixturefunc)
+    fail(msg + ":\n\n" + str(source.indent()) + "\n" + location, pytrace=False)
+
+
+def call_fixture_func(
+    fixturefunc: "_FixtureFunc[FixtureValue]", request: FixtureRequest, kwargs
+) -> FixtureValue:
+    if is_generator(fixturefunc):
+        fixturefunc = cast(
+            Callable[..., Generator[FixtureValue, None, None]], fixturefunc
+        )
+        generator = fixturefunc(**kwargs)
+        try:
+            fixture_result = next(generator)
+        except StopIteration:
+            raise ValueError(f"{request.fixturename} did not yield a value") from None
+        finalizer = functools.partial(_teardown_yield_fixture, fixturefunc, generator)
+        request.addfinalizer(finalizer)
+    else:
+        fixturefunc = cast(Callable[..., FixtureValue], fixturefunc)
+        fixture_result = fixturefunc(**kwargs)
+    return fixture_result
+
+
+def _teardown_yield_fixture(fixturefunc, it) -> None:
+    """Execute the teardown of a fixture function by advancing the iterator
+    after the yield and ensure the iteration ends (if not it means there is
+    more than one yield in the function)."""
+    try:
+        next(it)
+    except StopIteration:
+        pass
+    else:
+        fail_fixturefunc(fixturefunc, "fixture function has more than one 'yield'")
+
+
+def _eval_scope_callable(
+    scope_callable: "Callable[[str, Config], _ScopeName]",
+    fixture_name: str,
+    config: Config,
+) -> "_ScopeName":
+    try:
+        # Type ignored because there is no typing mechanism to specify
+        # keyword arguments, currently.
+        result = scope_callable(fixture_name=fixture_name, config=config)  # type: ignore[call-arg]
+    except Exception as e:
+        raise TypeError(
+            "Error evaluating {} while defining fixture '{}'.\n"
+            "Expected a function with the signature (*, fixture_name, config)".format(
+                scope_callable, fixture_name
+            )
+        ) from e
+    if not isinstance(result, str):
+        fail(
+            "Expected {} to return a 'str' while defining fixture '{}', but it returned:\n"
+            "{!r}".format(scope_callable, fixture_name, result),
+            pytrace=False,
+        )
+    return result
+
+
+@final
+class FixtureDef(Generic[FixtureValue]):
+    """A container for a fixture definition."""
+
+    def __init__(
+        self,
+        fixturemanager: "FixtureManager",
+        baseid: Optional[str],
+        argname: str,
+        func: "_FixtureFunc[FixtureValue]",
+        scope: Union[Scope, "_ScopeName", Callable[[str, Config], "_ScopeName"], None],
+        params: Optional[Sequence[object]],
+        unittest: bool = False,
+        ids: Optional[
+            Union[Tuple[Optional[object], ...], Callable[[Any], Optional[object]]]
+        ] = None,
+    ) -> None:
+        self._fixturemanager = fixturemanager
+        # The "base" node ID for the fixture.
+        #
+        # This is a node ID prefix. A fixture is only available to a node (e.g.
+        # a `Function` item) if the fixture's baseid is a parent of the node's
+        # nodeid (see the `iterparentnodeids` function for what constitutes a
+        # "parent" and a "prefix" in this context).
+        #
+        # For a fixture found in a Collector's object (e.g. a `Module`s module,
+        # a `Class`'s class), the baseid is the Collector's nodeid.
+        #
+        # For a fixture found in a conftest plugin, the baseid is the conftest's
+        # directory path relative to the rootdir.
+        #
+        # For other plugins, the baseid is the empty string (always matches).
+        self.baseid = baseid or ""
+        # Whether the fixture was found from a node or a conftest in the
+        # collection tree. Will be false for fixtures defined in non-conftest
+        # plugins.
+        self.has_location = baseid is not None
+        # The fixture factory function.
+        self.func = func
+        # The name by which the fixture may be requested.
+        self.argname = argname
+        if scope is None:
+            scope = Scope.Function
+        elif callable(scope):
+            scope = _eval_scope_callable(scope, argname, fixturemanager.config)
+        if isinstance(scope, str):
+            scope = Scope.from_user(
+                scope, descr=f"Fixture '{func.__name__}'", where=baseid
+            )
+        self._scope = scope
+        # If the fixture is directly parametrized, the parameter values.
+        self.params: Optional[Sequence[object]] = params
+        # If the fixture is directly parametrized, a tuple of explicit IDs to
+        # assign to the parameter values, or a callable to generate an ID given
+        # a parameter value.
+        self.ids = ids
+        # The names requested by the fixtures.
+        self.argnames = getfuncargnames(func, name=argname, is_method=unittest)
+        # Whether the fixture was collected from a unittest TestCase class.
+        # Note that it really only makes sense to define autouse fixtures in
+        # unittest TestCases.
+        self.unittest = unittest
+        # If the fixture was executed, the current value of the fixture.
+        # Can change if the fixture is executed with different parameters.
+        self.cached_result: Optional[_FixtureCachedResult[FixtureValue]] = None
+        self._finalizers: List[Callable[[], object]] = []
+
+    @property
+    def scope(self) -> "_ScopeName":
+        """Scope string, one of "function", "class", "module", "package", "session"."""
+        return self._scope.value
+
+    def addfinalizer(self, finalizer: Callable[[], object]) -> None:
+        self._finalizers.append(finalizer)
+
+    def finish(self, request: SubRequest) -> None:
+        exc = None
+        try:
+            while self._finalizers:
+                try:
+                    func = self._finalizers.pop()
+                    func()
+                except BaseException as e:
+                    # XXX Only first exception will be seen by user,
+                    #     ideally all should be reported.
+                    if exc is None:
+                        exc = e
+            if exc:
+                raise exc
+        finally:
+            ihook = request.node.ihook
+            ihook.pytest_fixture_post_finalizer(fixturedef=self, request=request)
+            # Even if finalization fails, we invalidate the cached fixture
+            # value and remove all finalizers because they may be bound methods
+            # which will keep instances alive.
+            self.cached_result = None
+            self._finalizers = []
+
+    def execute(self, request: SubRequest) -> FixtureValue:
+        # Get required arguments and register our own finish()
+        # with their finalization.
+        for argname in self.argnames:
+            fixturedef = request._get_active_fixturedef(argname)
+            if argname != "request":
+                # PseudoFixtureDef is only for "request".
+                assert isinstance(fixturedef, FixtureDef)
+                fixturedef.addfinalizer(functools.partial(self.finish, request=request))
+
+        my_cache_key = self.cache_key(request)
+        if self.cached_result is not None:
+            # note: comparison with `==` can fail (or be expensive) for e.g.
+            # numpy arrays (#6497).
+            cache_key = self.cached_result[1]
+            if my_cache_key is cache_key:
+                if self.cached_result[2] is not None:
+                    _, val, tb = self.cached_result[2]
+                    raise val.with_traceback(tb)
+                else:
+                    result = self.cached_result[0]
+                    return result
+            # We have a previous but differently parametrized fixture instance
+            # so we need to tear it down before creating a new one.
+            self.finish(request)
+            assert self.cached_result is None
+
+        ihook = request.node.ihook
+        result = ihook.pytest_fixture_setup(fixturedef=self, request=request)
+        return result
+
+    def cache_key(self, request: SubRequest) -> object:
+        return request.param_index if not hasattr(request, "param") else request.param
+
+    def __repr__(self) -> str:
+        return "<FixtureDef argname={!r} scope={!r} baseid={!r}>".format(
+            self.argname, self.scope, self.baseid
+        )
+
+
+def resolve_fixture_function(
+    fixturedef: FixtureDef[FixtureValue], request: FixtureRequest
+) -> "_FixtureFunc[FixtureValue]":
+    """Get the actual callable that can be called to obtain the fixture
+    value, dealing with unittest-specific instances and bound methods."""
+    fixturefunc = fixturedef.func
+    if fixturedef.unittest:
+        if request.instance is not None:
+            # Bind the unbound method to the TestCase instance.
+            fixturefunc = fixturedef.func.__get__(request.instance)  # type: ignore[union-attr]
+    else:
+        # The fixture function needs to be bound to the actual
+        # request.instance so that code working with "fixturedef" behaves
+        # as expected.
+        if request.instance is not None:
+            # Handle the case where fixture is defined not in a test class, but some other class
+            # (for example a plugin class with a fixture), see #2270.
+            if hasattr(fixturefunc, "__self__") and not isinstance(
+                request.instance, fixturefunc.__self__.__class__  # type: ignore[union-attr]
+            ):
+                return fixturefunc
+            fixturefunc = getimfunc(fixturedef.func)
+            if fixturefunc != fixturedef.func:
+                fixturefunc = fixturefunc.__get__(request.instance)  # type: ignore[union-attr]
+    return fixturefunc
+
+
+def pytest_fixture_setup(
+    fixturedef: FixtureDef[FixtureValue], request: SubRequest
+) -> FixtureValue:
+    """Execution of fixture setup."""
+    kwargs = {}
+    for argname in fixturedef.argnames:
+        fixdef = request._get_active_fixturedef(argname)
+        assert fixdef.cached_result is not None
+        result, arg_cache_key, exc = fixdef.cached_result
+        request._check_scope(argname, request._scope, fixdef._scope)
+        kwargs[argname] = result
+
+    fixturefunc = resolve_fixture_function(fixturedef, request)
+    my_cache_key = fixturedef.cache_key(request)
+    try:
+        result = call_fixture_func(fixturefunc, request, kwargs)
+    except TEST_OUTCOME:
+        exc_info = sys.exc_info()
+        assert exc_info[0] is not None
+        if isinstance(
+            exc_info[1], skip.Exception
+        ) and not fixturefunc.__name__.startswith("xunit_setup"):
+            exc_info[1]._use_item_location = True  # type: ignore[attr-defined]
+        fixturedef.cached_result = (None, my_cache_key, exc_info)
+        raise
+    fixturedef.cached_result = (result, my_cache_key, None)
+    return result
+
+
+def _ensure_immutable_ids(
+    ids: Optional[Union[Sequence[Optional[object]], Callable[[Any], Optional[object]]]]
+) -> Optional[Union[Tuple[Optional[object], ...], Callable[[Any], Optional[object]]]]:
+    if ids is None:
+        return None
+    if callable(ids):
+        return ids
+    return tuple(ids)
+
+
+def _params_converter(
+    params: Optional[Iterable[object]],
+) -> Optional[Tuple[object, ...]]:
+    return tuple(params) if params is not None else None
+
+
+def wrap_function_to_error_out_if_called_directly(
+    function: FixtureFunction,
+    fixture_marker: "FixtureFunctionMarker",
+) -> FixtureFunction:
+    """Wrap the given fixture function so we can raise an error about it being called directly,
+    instead of used as an argument in a test function."""
+    message = (
+        'Fixture "{name}" called directly. Fixtures are not meant to be called directly,\n'
+        "but are created automatically when test functions request them as parameters.\n"
+        "See https://docs.pytest.org/en/stable/explanation/fixtures.html for more information about fixtures, and\n"
+        "https://docs.pytest.org/en/stable/deprecations.html#calling-fixtures-directly about how to update your code."
+    ).format(name=fixture_marker.name or function.__name__)
+
+    @functools.wraps(function)
+    def result(*args, **kwargs):
+        fail(message, pytrace=False)
+
+    # Keep reference to the original function in our own custom attribute so we don't unwrap
+    # further than this point and lose useful wrappings like @mock.patch (#3774).
+    result.__pytest_wrapped__ = _PytestWrapper(function)  # type: ignore[attr-defined]
+
+    return cast(FixtureFunction, result)
+
+
+@final
+@dataclasses.dataclass(frozen=True)
+class FixtureFunctionMarker:
+    scope: "Union[_ScopeName, Callable[[str, Config], _ScopeName]]"
+    params: Optional[Tuple[object, ...]]
+    autouse: bool = False
+    ids: Optional[
+        Union[Tuple[Optional[object], ...], Callable[[Any], Optional[object]]]
+    ] = None
+    name: Optional[str] = None
+
+    _ispytest: dataclasses.InitVar[bool] = False
+
+    def __post_init__(self, _ispytest: bool) -> None:
+        check_ispytest(_ispytest)
+
+    def __call__(self, function: FixtureFunction) -> FixtureFunction:
+        if inspect.isclass(function):
+            raise ValueError("class fixtures not supported (maybe in the future)")
+
+        if getattr(function, "_pytestfixturefunction", False):
+            raise ValueError(
+                "fixture is being applied more than once to the same function"
+            )
+
+        function = wrap_function_to_error_out_if_called_directly(function, self)
+
+        name = self.name or function.__name__
+        if name == "request":
+            location = getlocation(function)
+            fail(
+                "'request' is a reserved word for fixtures, use another name:\n  {}".format(
+                    location
+                ),
+                pytrace=False,
+            )
+
+        # Type ignored because https://github.com/python/mypy/issues/2087.
+        function._pytestfixturefunction = self  # type: ignore[attr-defined]
+        return function
+
+
+@overload
+def fixture(
+    fixture_function: FixtureFunction,
+    *,
+    scope: "Union[_ScopeName, Callable[[str, Config], _ScopeName]]" = ...,
+    params: Optional[Iterable[object]] = ...,
+    autouse: bool = ...,
+    ids: Optional[
+        Union[Sequence[Optional[object]], Callable[[Any], Optional[object]]]
+    ] = ...,
+    name: Optional[str] = ...,
+) -> FixtureFunction:
+    ...
+
+
+@overload
+def fixture(  # noqa: F811
+    fixture_function: None = ...,
+    *,
+    scope: "Union[_ScopeName, Callable[[str, Config], _ScopeName]]" = ...,
+    params: Optional[Iterable[object]] = ...,
+    autouse: bool = ...,
+    ids: Optional[
+        Union[Sequence[Optional[object]], Callable[[Any], Optional[object]]]
+    ] = ...,
+    name: Optional[str] = None,
+) -> FixtureFunctionMarker:
+    ...
+
+
+def fixture(  # noqa: F811
+    fixture_function: Optional[FixtureFunction] = None,
+    *,
+    scope: "Union[_ScopeName, Callable[[str, Config], _ScopeName]]" = "function",
+    params: Optional[Iterable[object]] = None,
+    autouse: bool = False,
+    ids: Optional[
+        Union[Sequence[Optional[object]], Callable[[Any], Optional[object]]]
+    ] = None,
+    name: Optional[str] = None,
+) -> Union[FixtureFunctionMarker, FixtureFunction]:
+    """Decorator to mark a fixture factory function.
+
+    This decorator can be used, with or without parameters, to define a
+    fixture function.
+
+    The name of the fixture function can later be referenced to cause its
+    invocation ahead of running tests: test modules or classes can use the
+    ``pytest.mark.usefixtures(fixturename)`` marker.
+
+    Test functions can directly use fixture names as input arguments in which
+    case the fixture instance returned from the fixture function will be
+    injected.
+
+    Fixtures can provide their values to test functions using ``return`` or
+    ``yield`` statements. When using ``yield`` the code block after the
+    ``yield`` statement is executed as teardown code regardless of the test
+    outcome, and must yield exactly once.
+
+    :param scope:
+        The scope for which this fixture is shared; one of ``"function"``
+        (default), ``"class"``, ``"module"``, ``"package"`` or ``"session"``.
+
+        This parameter may also be a callable which receives ``(fixture_name, config)``
+        as parameters, and must return a ``str`` with one of the values mentioned above.
+
+        See :ref:`dynamic scope` in the docs for more information.
+
+    :param params:
+        An optional list of parameters which will cause multiple invocations
+        of the fixture function and all of the tests using it. The current
+        parameter is available in ``request.param``.
+
+    :param autouse:
+        If True, the fixture func is activated for all tests that can see it.
+        If False (the default), an explicit reference is needed to activate
+        the fixture.
+
+    :param ids:
+        Sequence of ids each corresponding to the params so that they are
+        part of the test id. If no ids are provided they will be generated
+        automatically from the params.
+
+    :param name:
+        The name of the fixture. This defaults to the name of the decorated
+        function. If a fixture is used in the same module in which it is
+        defined, the function name of the fixture will be shadowed by the
+        function arg that requests the fixture; one way to resolve this is to
+        name the decorated function ``fixture_<fixturename>`` and then use
+        ``@pytest.fixture(name='<fixturename>')``.
+    """
+    fixture_marker = FixtureFunctionMarker(
+        scope=scope,
+        params=tuple(params) if params is not None else None,
+        autouse=autouse,
+        ids=None if ids is None else ids if callable(ids) else tuple(ids),
+        name=name,
+        _ispytest=True,
+    )
+
+    # Direct decoration.
+    if fixture_function:
+        return fixture_marker(fixture_function)
+
+    return fixture_marker
+
+
+def yield_fixture(
+    fixture_function=None,
+    *args,
+    scope="function",
+    params=None,
+    autouse=False,
+    ids=None,
+    name=None,
+):
+    """(Return a) decorator to mark a yield-fixture factory function.
+
+    .. deprecated:: 3.0
+        Use :py:func:`pytest.fixture` directly instead.
+    """
+    warnings.warn(YIELD_FIXTURE, stacklevel=2)
+    return fixture(
+        fixture_function,
+        *args,
+        scope=scope,
+        params=params,
+        autouse=autouse,
+        ids=ids,
+        name=name,
+    )
+
+
+@fixture(scope="session")
+def pytestconfig(request: FixtureRequest) -> Config:
+    """Session-scoped fixture that returns the session's :class:`pytest.Config`
+    object.
+
+    Example::
+
+        def test_foo(pytestconfig):
+            if pytestconfig.getoption("verbose") > 0:
+                ...
+
+    """
+    return request.config
+
+
+def pytest_addoption(parser: Parser) -> None:
+    parser.addini(
+        "usefixtures",
+        type="args",
+        default=[],
+        help="List of default fixtures to be used with this project",
+    )
+
+
+class FixtureManager:
+    """pytest fixture definitions and information is stored and managed
+    from this class.
+
+    During collection fm.parsefactories() is called multiple times to parse
+    fixture function definitions into FixtureDef objects and internal
+    data structures.
+
+    During collection of test functions, metafunc-mechanics instantiate
+    a FuncFixtureInfo object which is cached per node/func-name.
+    This FuncFixtureInfo object is later retrieved by Function nodes
+    which themselves offer a fixturenames attribute.
+
+    The FuncFixtureInfo object holds information about fixtures and FixtureDefs
+    relevant for a particular function. An initial list of fixtures is
+    assembled like this:
+
+    - ini-defined usefixtures
+    - autouse-marked fixtures along the collection chain up from the function
+    - usefixtures markers at module/class/function level
+    - test function funcargs
+
+    Subsequently the funcfixtureinfo.fixturenames attribute is computed
+    as the closure of the fixtures needed to setup the initial fixtures,
+    i.e. fixtures needed by fixture functions themselves are appended
+    to the fixturenames list.
+
+    Upon the test-setup phases all fixturenames are instantiated, retrieved
+    by a lookup of their FuncFixtureInfo.
+    """
+
+    FixtureLookupError = FixtureLookupError
+    FixtureLookupErrorRepr = FixtureLookupErrorRepr
+
+    def __init__(self, session: "Session") -> None:
+        self.session = session
+        self.config: Config = session.config
+        self._arg2fixturedefs: Dict[str, List[FixtureDef[Any]]] = {}
+        self._holderobjseen: Set[object] = set()
+        # A mapping from a nodeid to a list of autouse fixtures it defines.
+        self._nodeid_autousenames: Dict[str, List[str]] = {
+            "": self.config.getini("usefixtures"),
+        }
+        session.config.pluginmanager.register(self, "funcmanage")
+
+    def _get_direct_parametrize_args(self, node: nodes.Node) -> List[str]:
+        """Return all direct parametrization arguments of a node, so we don't
+        mistake them for fixtures.
+
+        Check https://github.com/pytest-dev/pytest/issues/5036.
+
+        These things are done later as well when dealing with parametrization
+        so this could be improved.
+        """
+        parametrize_argnames: List[str] = []
+        for marker in node.iter_markers(name="parametrize"):
+            if not marker.kwargs.get("indirect", False):
+                p_argnames, _ = ParameterSet._parse_parametrize_args(
+                    *marker.args, **marker.kwargs
+                )
+                parametrize_argnames.extend(p_argnames)
+
+        return parametrize_argnames
+
+    def getfixtureinfo(
+        self, node: nodes.Node, func, cls, funcargs: bool = True
+    ) -> FuncFixtureInfo:
+        if funcargs and not getattr(node, "nofuncargs", False):
+            argnames = getfuncargnames(func, name=node.name, cls=cls)
+        else:
+            argnames = ()
+
+        usefixtures = tuple(
+            arg for mark in node.iter_markers(name="usefixtures") for arg in mark.args
+        )
+        initialnames = usefixtures + argnames
+        fm = node.session._fixturemanager
+        initialnames, names_closure, arg2fixturedefs = fm.getfixtureclosure(
+            initialnames, node, ignore_args=self._get_direct_parametrize_args(node)
+        )
+        return FuncFixtureInfo(argnames, initialnames, names_closure, arg2fixturedefs)
+
+    def pytest_plugin_registered(self, plugin: _PluggyPlugin) -> None:
+        nodeid = None
+        try:
+            p = absolutepath(plugin.__file__)  # type: ignore[attr-defined]
+        except AttributeError:
+            pass
+        else:
+            # Construct the base nodeid which is later used to check
+            # what fixtures are visible for particular tests (as denoted
+            # by their test id).
+            if p.name.startswith("conftest.py"):
+                try:
+                    nodeid = str(p.parent.relative_to(self.config.rootpath))
+                except ValueError:
+                    nodeid = ""
+                if nodeid == ".":
+                    nodeid = ""
+                if os.sep != nodes.SEP:
+                    nodeid = nodeid.replace(os.sep, nodes.SEP)
+
+        self.parsefactories(plugin, nodeid)
+
+    def _getautousenames(self, nodeid: str) -> Iterator[str]:
+        """Return the names of autouse fixtures applicable to nodeid."""
+        for parentnodeid in nodes.iterparentnodeids(nodeid):
+            basenames = self._nodeid_autousenames.get(parentnodeid)
+            if basenames:
+                yield from basenames
+
+    def getfixtureclosure(
+        self,
+        fixturenames: Tuple[str, ...],
+        parentnode: nodes.Node,
+        ignore_args: Sequence[str] = (),
+    ) -> Tuple[Tuple[str, ...], List[str], Dict[str, Sequence[FixtureDef[Any]]]]:
+        # Collect the closure of all fixtures, starting with the given
+        # fixturenames as the initial set.  As we have to visit all
+        # factory definitions anyway, we also return an arg2fixturedefs
+        # mapping so that the caller can reuse it and does not have
+        # to re-discover fixturedefs again for each fixturename
+        # (discovering matching fixtures for a given name/node is expensive).
+
+        parentid = parentnode.nodeid
+        fixturenames_closure = list(self._getautousenames(parentid))
+
+        def merge(otherlist: Iterable[str]) -> None:
+            for arg in otherlist:
+                if arg not in fixturenames_closure:
+                    fixturenames_closure.append(arg)
+
+        merge(fixturenames)
+
+        # At this point, fixturenames_closure contains what we call "initialnames",
+        # which is a set of fixturenames the function immediately requests. We
+        # need to return it as well, so save this.
+        initialnames = tuple(fixturenames_closure)
+
+        arg2fixturedefs: Dict[str, Sequence[FixtureDef[Any]]] = {}
+        lastlen = -1
+        while lastlen != len(fixturenames_closure):
+            lastlen = len(fixturenames_closure)
+            for argname in fixturenames_closure:
+                if argname in ignore_args:
+                    continue
+                if argname in arg2fixturedefs:
+                    continue
+                fixturedefs = self.getfixturedefs(argname, parentid)
+                if fixturedefs:
+                    arg2fixturedefs[argname] = fixturedefs
+                    merge(fixturedefs[-1].argnames)
+
+        def sort_by_scope(arg_name: str) -> Scope:
+            try:
+                fixturedefs = arg2fixturedefs[arg_name]
+            except KeyError:
+                return Scope.Function
+            else:
+                return fixturedefs[-1]._scope
+
+        fixturenames_closure.sort(key=sort_by_scope, reverse=True)
+        return initialnames, fixturenames_closure, arg2fixturedefs
+
+    def pytest_generate_tests(self, metafunc: "Metafunc") -> None:
+        """Generate new tests based on parametrized fixtures used by the given metafunc"""
+
+        def get_parametrize_mark_argnames(mark: Mark) -> Sequence[str]:
+            args, _ = ParameterSet._parse_parametrize_args(*mark.args, **mark.kwargs)
+            return args
+
+        for argname in metafunc.fixturenames:
+            # Get the FixtureDefs for the argname.
+            fixture_defs = metafunc._arg2fixturedefs.get(argname)
+            if not fixture_defs:
+                # Will raise FixtureLookupError at setup time if not parametrized somewhere
+                # else (e.g @pytest.mark.parametrize)
+                continue
+
+            # If the test itself parametrizes using this argname, give it
+            # precedence.
+            if any(
+                argname in get_parametrize_mark_argnames(mark)
+                for mark in metafunc.definition.iter_markers("parametrize")
+            ):
+                continue
+
+            # In the common case we only look at the fixture def with the
+            # closest scope (last in the list). But if the fixture overrides
+            # another fixture, while requesting the super fixture, keep going
+            # in case the super fixture is parametrized (#1953).
+            for fixturedef in reversed(fixture_defs):
+                # Fixture is parametrized, apply it and stop.
+                if fixturedef.params is not None:
+                    metafunc.parametrize(
+                        argname,
+                        fixturedef.params,
+                        indirect=True,
+                        scope=fixturedef.scope,
+                        ids=fixturedef.ids,
+                    )
+                    break
+
+                # Not requesting the overridden super fixture, stop.
+                if argname not in fixturedef.argnames:
+                    break
+
+                # Try next super fixture, if any.
+
+    def pytest_collection_modifyitems(self, items: List[nodes.Item]) -> None:
+        # Separate parametrized setups.
+        items[:] = reorder_items(items)
+
+    @overload
+    def parsefactories(
+        self,
+        node_or_obj: nodes.Node,
+        *,
+        unittest: bool = ...,
+    ) -> None:
+        raise NotImplementedError()
+
+    @overload
+    def parsefactories(  # noqa: F811
+        self,
+        node_or_obj: object,
+        nodeid: Optional[str],
+        *,
+        unittest: bool = ...,
+    ) -> None:
+        raise NotImplementedError()
+
+    def parsefactories(  # noqa: F811
+        self,
+        node_or_obj: Union[nodes.Node, object],
+        nodeid: Union[str, NotSetType, None] = NOTSET,
+        *,
+        unittest: bool = False,
+    ) -> None:
+        """Collect fixtures from a collection node or object.
+
+        Found fixtures are parsed into `FixtureDef`s and saved.
+
+        If `node_or_object` is a collection node (with an underlying Python
+        object), the node's object is traversed and the node's nodeid is used to
+        determine the fixtures' visibilty. `nodeid` must not be specified in
+        this case.
+
+        If `node_or_object` is an object (e.g. a plugin), the object is
+        traversed and the given `nodeid` is used to determine the fixtures'
+        visibility. `nodeid` must be specified in this case; None and "" mean
+        total visibility.
+        """
+        if nodeid is not NOTSET:
+            holderobj = node_or_obj
+        else:
+            assert isinstance(node_or_obj, nodes.Node)
+            holderobj = cast(object, node_or_obj.obj)  # type: ignore[attr-defined]
+            assert isinstance(node_or_obj.nodeid, str)
+            nodeid = node_or_obj.nodeid
+        if holderobj in self._holderobjseen:
+            return
+
+        self._holderobjseen.add(holderobj)
+        autousenames = []
+        for name in dir(holderobj):
+            # ugly workaround for one of the fspath deprecated property of node
+            # todo: safely generalize
+            if isinstance(holderobj, nodes.Node) and name == "fspath":
+                continue
+
+            # The attribute can be an arbitrary descriptor, so the attribute
+            # access below can raise. safe_getatt() ignores such exceptions.
+            obj = safe_getattr(holderobj, name, None)
+            marker = getfixturemarker(obj)
+            if not isinstance(marker, FixtureFunctionMarker):
+                # Magic globals  with __getattr__ might have got us a wrong
+                # fixture attribute.
+                continue
+
+            if marker.name:
+                name = marker.name
+
+            # During fixture definition we wrap the original fixture function
+            # to issue a warning if called directly, so here we unwrap it in
+            # order to not emit the warning when pytest itself calls the
+            # fixture function.
+            obj = get_real_method(obj, holderobj)
+
+            fixture_def = FixtureDef(
+                fixturemanager=self,
+                baseid=nodeid,
+                argname=name,
+                func=obj,
+                scope=marker.scope,
+                params=marker.params,
+                unittest=unittest,
+                ids=marker.ids,
+            )
+
+            faclist = self._arg2fixturedefs.setdefault(name, [])
+            if fixture_def.has_location:
+                faclist.append(fixture_def)
+            else:
+                # fixturedefs with no location are at the front
+                # so this inserts the current fixturedef after the
+                # existing fixturedefs from external plugins but
+                # before the fixturedefs provided in conftests.
+                i = len([f for f in faclist if not f.has_location])
+                faclist.insert(i, fixture_def)
+            if marker.autouse:
+                autousenames.append(name)
+
+        if autousenames:
+            self._nodeid_autousenames.setdefault(nodeid or "", []).extend(autousenames)
+
+    def getfixturedefs(
+        self, argname: str, nodeid: str
+    ) -> Optional[Sequence[FixtureDef[Any]]]:
+        """Get a list of fixtures which are applicable to the given node id.
+
+        :param str argname: Name of the fixture to search for.
+        :param str nodeid: Full node id of the requesting test.
+        :rtype: Sequence[FixtureDef]
+        """
+        try:
+            fixturedefs = self._arg2fixturedefs[argname]
+        except KeyError:
+            return None
+        return tuple(self._matchfactories(fixturedefs, nodeid))
+
+    def _matchfactories(
+        self, fixturedefs: Iterable[FixtureDef[Any]], nodeid: str
+    ) -> Iterator[FixtureDef[Any]]:
+        parentnodeids = set(nodes.iterparentnodeids(nodeid))
+        for fixturedef in fixturedefs:
+            if fixturedef.baseid in parentnodeids:
+                yield fixturedef
diff --git a/contrib/python/pytest/py3/_pytest/freeze_support.py b/contrib/python/pytest/py3/_pytest/freeze_support.py
new file mode 100644
index 0000000000..9f8ea231fe
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/freeze_support.py
@@ -0,0 +1,44 @@
+"""Provides a function to report all internal modules for using freezing
+tools."""
+import types
+from typing import Iterator
+from typing import List
+from typing import Union
+
+
+def freeze_includes() -> List[str]:
+    """Return a list of module names used by pytest that should be
+    included by cx_freeze."""
+    import _pytest
+
+    result = list(_iter_all_modules(_pytest))
+    return result
+
+
+def _iter_all_modules(
+    package: Union[str, types.ModuleType],
+    prefix: str = "",
+) -> Iterator[str]:
+    """Iterate over the names of all modules that can be found in the given
+    package, recursively.
+
+        >>> import _pytest
+        >>> list(_iter_all_modules(_pytest))
+        ['_pytest._argcomplete', '_pytest._code.code', ...]
+    """
+    import os
+    import pkgutil
+
+    if isinstance(package, str):
+        path = package
+    else:
+        # Type ignored because typeshed doesn't define ModuleType.__path__
+        # (only defined on packages).
+        package_path = package.__path__  # type: ignore[attr-defined]
+        path, prefix = package_path[0], package.__name__ + "."
+    for _, name, is_package in pkgutil.iter_modules([path]):
+        if is_package:
+            for m in _iter_all_modules(os.path.join(path, name), prefix=name + "."):
+                yield prefix + m
+        else:
+            yield prefix + name
diff --git a/contrib/python/pytest/py3/_pytest/helpconfig.py b/contrib/python/pytest/py3/_pytest/helpconfig.py
new file mode 100644
index 0000000000..ea16c43882
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/helpconfig.py
@@ -0,0 +1,270 @@
+"""Version info, help messages, tracing configuration."""
+import os
+import sys
+from argparse import Action
+from typing import List
+from typing import Optional
+from typing import Union
+
+import pytest
+from _pytest.config import Config
+from _pytest.config import ExitCode
+from _pytest.config import PrintHelp
+from _pytest.config.argparsing import Parser
+from _pytest.terminal import TerminalReporter
+
+
+class HelpAction(Action):
+    """An argparse Action that will raise an exception in order to skip the
+    rest of the argument parsing when --help is passed.
+
+    This prevents argparse from quitting due to missing required arguments
+    when any are defined, for example by ``pytest_addoption``.
+    This is similar to the way that the builtin argparse --help option is
+    implemented by raising SystemExit.
+    """
+
+    def __init__(self, option_strings, dest=None, default=False, help=None):
+        super().__init__(
+            option_strings=option_strings,
+            dest=dest,
+            const=True,
+            default=default,
+            nargs=0,
+            help=help,
+        )
+
+    def __call__(self, parser, namespace, values, option_string=None):
+        setattr(namespace, self.dest, self.const)
+
+        # We should only skip the rest of the parsing after preparse is done.
+        if getattr(parser._parser, "after_preparse", False):
+            raise PrintHelp
+
+
+def pytest_addoption(parser: Parser) -> None:
+    group = parser.getgroup("debugconfig")
+    group.addoption(
+        "--version",
+        "-V",
+        action="count",
+        default=0,
+        dest="version",
+        help="Display pytest version and information about plugins. "
+        "When given twice, also display information about plugins.",
+    )
+    group._addoption(
+        "-h",
+        "--help",
+        action=HelpAction,
+        dest="help",
+        help="Show help message and configuration info",
+    )
+    group._addoption(
+        "-p",
+        action="append",
+        dest="plugins",
+        default=[],
+        metavar="name",
+        help="Early-load given plugin module name or entry point (multi-allowed). "
+        "To avoid loading of plugins, use the `no:` prefix, e.g. "
+        "`no:doctest`.",
+    )
+    group.addoption(
+        "--traceconfig",
+        "--trace-config",
+        action="store_true",
+        default=False,
+        help="Trace considerations of conftest.py files",
+    )
+    group.addoption(
+        "--debug",
+        action="store",
+        nargs="?",
+        const="pytestdebug.log",
+        dest="debug",
+        metavar="DEBUG_FILE_NAME",
+        help="Store internal tracing debug information in this log file. "
+        "This file is opened with 'w' and truncated as a result, care advised. "
+        "Default: pytestdebug.log.",
+    )
+    group._addoption(
+        "-o",
+        "--override-ini",
+        dest="override_ini",
+        action="append",
+        help='Override ini option with "option=value" style, '
+        "e.g. `-o xfail_strict=True -o cache_dir=cache`.",
+    )
+
+
+@pytest.hookimpl(hookwrapper=True)
+def pytest_cmdline_parse():
+    outcome = yield
+    config: Config = outcome.get_result()
+
+    if config.option.debug:
+        # --debug | --debug <file.log> was provided.
+        path = config.option.debug
+        debugfile = open(path, "w", encoding="utf-8")
+        debugfile.write(
+            "versions pytest-%s, "
+            "python-%s\ncwd=%s\nargs=%s\n\n"
+            % (
+                pytest.__version__,
+                ".".join(map(str, sys.version_info)),
+                os.getcwd(),
+                config.invocation_params.args,
+            )
+        )
+        config.trace.root.setwriter(debugfile.write)
+        undo_tracing = config.pluginmanager.enable_tracing()
+        sys.stderr.write("writing pytest debug information to %s\n" % path)
+
+        def unset_tracing() -> None:
+            debugfile.close()
+            sys.stderr.write("wrote pytest debug information to %s\n" % debugfile.name)
+            config.trace.root.setwriter(None)
+            undo_tracing()
+
+        config.add_cleanup(unset_tracing)
+
+
+def showversion(config: Config) -> None:
+    if config.option.version > 1:
+        sys.stdout.write(
+            "This is pytest version {}, imported from {}\n".format(
+                pytest.__version__, pytest.__file__
+            )
+        )
+        plugininfo = getpluginversioninfo(config)
+        if plugininfo:
+            for line in plugininfo:
+                sys.stdout.write(line + "\n")
+    else:
+        sys.stdout.write(f"pytest {pytest.__version__}\n")
+
+
+def pytest_cmdline_main(config: Config) -> Optional[Union[int, ExitCode]]:
+    if config.option.version > 0:
+        showversion(config)
+        return 0
+    elif config.option.help:
+        config._do_configure()
+        showhelp(config)
+        config._ensure_unconfigure()
+        return 0
+    return None
+
+
+def showhelp(config: Config) -> None:
+    import textwrap
+
+    reporter: Optional[TerminalReporter] = config.pluginmanager.get_plugin(
+        "terminalreporter"
+    )
+    assert reporter is not None
+    tw = reporter._tw
+    tw.write(config._parser.optparser.format_help())
+    tw.line()
+    tw.line(
+        "[pytest] ini-options in the first "
+        "pytest.ini|tox.ini|setup.cfg|pyproject.toml file found:"
+    )
+    tw.line()
+
+    columns = tw.fullwidth  # costly call
+    indent_len = 24  # based on argparse's max_help_position=24
+    indent = " " * indent_len
+    for name in config._parser._ininames:
+        help, type, default = config._parser._inidict[name]
+        if type is None:
+            type = "string"
+        if help is None:
+            raise TypeError(f"help argument cannot be None for {name}")
+        spec = f"{name} ({type}):"
+        tw.write("  %s" % spec)
+        spec_len = len(spec)
+        if spec_len > (indent_len - 3):
+            # Display help starting at a new line.
+            tw.line()
+            helplines = textwrap.wrap(
+                help,
+                columns,
+                initial_indent=indent,
+                subsequent_indent=indent,
+                break_on_hyphens=False,
+            )
+
+            for line in helplines:
+                tw.line(line)
+        else:
+            # Display help starting after the spec, following lines indented.
+            tw.write(" " * (indent_len - spec_len - 2))
+            wrapped = textwrap.wrap(help, columns - indent_len, break_on_hyphens=False)
+
+            if wrapped:
+                tw.line(wrapped[0])
+                for line in wrapped[1:]:
+                    tw.line(indent + line)
+
+    tw.line()
+    tw.line("Environment variables:")
+    vars = [
+        ("PYTEST_ADDOPTS", "Extra command line options"),
+        ("PYTEST_PLUGINS", "Comma-separated plugins to load during startup"),
+        ("PYTEST_DISABLE_PLUGIN_AUTOLOAD", "Set to disable plugin auto-loading"),
+        ("PYTEST_DEBUG", "Set to enable debug tracing of pytest's internals"),
+    ]
+    for name, help in vars:
+        tw.line(f"  {name:<24} {help}")
+    tw.line()
+    tw.line()
+
+    tw.line("to see available markers type: pytest --markers")
+    tw.line("to see available fixtures type: pytest --fixtures")
+    tw.line(
+        "(shown according to specified file_or_dir or current dir "
+        "if not specified; fixtures with leading '_' are only shown "
+        "with the '-v' option"
+    )
+
+    for warningreport in reporter.stats.get("warnings", []):
+        tw.line("warning : " + warningreport.message, red=True)
+    return
+
+
+conftest_options = [("pytest_plugins", "list of plugin names to load")]
+
+
+def getpluginversioninfo(config: Config) -> List[str]:
+    lines = []
+    plugininfo = config.pluginmanager.list_plugin_distinfo()
+    if plugininfo:
+        lines.append("setuptools registered plugins:")
+        for plugin, dist in plugininfo:
+            loc = getattr(plugin, "__file__", repr(plugin))
+            content = f"{dist.project_name}-{dist.version} at {loc}"
+            lines.append("  " + content)
+    return lines
+
+
+def pytest_report_header(config: Config) -> List[str]:
+    lines = []
+    if config.option.debug or config.option.traceconfig:
+        lines.append(f"using: pytest-{pytest.__version__}")
+
+        verinfo = getpluginversioninfo(config)
+        if verinfo:
+            lines.extend(verinfo)
+
+    if config.option.traceconfig:
+        lines.append("active plugins:")
+        items = config.pluginmanager.list_name_plugin()
+        for name, plugin in items:
+            if hasattr(plugin, "__file__"):
+                r = plugin.__file__
+            else:
+                r = repr(plugin)
+            lines.append(f"    {name:<20}: {r}")
+    return lines
diff --git a/contrib/python/pytest/py3/_pytest/hookspec.py b/contrib/python/pytest/py3/_pytest/hookspec.py
new file mode 100644
index 0000000000..1f7c368f79
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/hookspec.py
@@ -0,0 +1,979 @@
+"""Hook specifications for pytest plugins which are invoked by pytest itself
+and by builtin plugins."""
+from pathlib import Path
+from typing import Any
+from typing import Dict
+from typing import List
+from typing import Mapping
+from typing import Optional
+from typing import Sequence
+from typing import Tuple
+from typing import TYPE_CHECKING
+from typing import Union
+
+from pluggy import HookspecMarker
+
+from _pytest.deprecated import WARNING_CMDLINE_PREPARSE_HOOK
+
+if TYPE_CHECKING:
+    import pdb
+    import warnings
+    from typing_extensions import Literal
+
+    from _pytest._code.code import ExceptionRepr
+    from _pytest._code.code import ExceptionInfo
+    from _pytest.config import Config
+    from _pytest.config import ExitCode
+    from _pytest.config import PytestPluginManager
+    from _pytest.config import _PluggyPlugin
+    from _pytest.config.argparsing import Parser
+    from _pytest.fixtures import FixtureDef
+    from _pytest.fixtures import SubRequest
+    from _pytest.main import Session
+    from _pytest.nodes import Collector
+    from _pytest.nodes import Item
+    from _pytest.outcomes import Exit
+    from _pytest.python import Class
+    from _pytest.python import Function
+    from _pytest.python import Metafunc
+    from _pytest.python import Module
+    from _pytest.reports import CollectReport
+    from _pytest.reports import TestReport
+    from _pytest.runner import CallInfo
+    from _pytest.terminal import TerminalReporter
+    from _pytest.terminal import TestShortLogReport
+    from _pytest.compat import LEGACY_PATH
+
+
+hookspec = HookspecMarker("pytest")
+
+# -------------------------------------------------------------------------
+# Initialization hooks called for every plugin
+# -------------------------------------------------------------------------
+
+
+@hookspec(historic=True)
+def pytest_addhooks(pluginmanager: "PytestPluginManager") -> None:
+    """Called at plugin registration time to allow adding new hooks via a call to
+    ``pluginmanager.add_hookspecs(module_or_class, prefix)``.
+
+    :param pytest.PytestPluginManager pluginmanager: The pytest plugin manager.
+
+    .. note::
+        This hook is incompatible with ``hookwrapper=True``.
+    """
+
+
+@hookspec(historic=True)
+def pytest_plugin_registered(
+    plugin: "_PluggyPlugin", manager: "PytestPluginManager"
+) -> None:
+    """A new pytest plugin got registered.
+
+    :param plugin: The plugin module or instance.
+    :param pytest.PytestPluginManager manager: pytest plugin manager.
+
+    .. note::
+        This hook is incompatible with ``hookwrapper=True``.
+    """
+
+
+@hookspec(historic=True)
+def pytest_addoption(parser: "Parser", pluginmanager: "PytestPluginManager") -> None:
+    """Register argparse-style options and ini-style config values,
+    called once at the beginning of a test run.
+
+    .. note::
+
+        This function should be implemented only in plugins or ``conftest.py``
+        files situated at the tests root directory due to how pytest
+        :ref:`discovers plugins during startup <pluginorder>`.
+
+    :param pytest.Parser parser:
+        To add command line options, call
+        :py:func:`parser.addoption(...) <pytest.Parser.addoption>`.
+        To add ini-file values call :py:func:`parser.addini(...)
+        <pytest.Parser.addini>`.
+
+    :param pytest.PytestPluginManager pluginmanager:
+        The pytest plugin manager, which can be used to install :py:func:`hookspec`'s
+        or :py:func:`hookimpl`'s and allow one plugin to call another plugin's hooks
+        to change how command line options are added.
+
+    Options can later be accessed through the
+    :py:class:`config <pytest.Config>` object, respectively:
+
+    - :py:func:`config.getoption(name) <pytest.Config.getoption>` to
+      retrieve the value of a command line option.
+
+    - :py:func:`config.getini(name) <pytest.Config.getini>` to retrieve
+      a value read from an ini-style file.
+
+    The config object is passed around on many internal objects via the ``.config``
+    attribute or can be retrieved as the ``pytestconfig`` fixture.
+
+    .. note::
+        This hook is incompatible with ``hookwrapper=True``.
+    """
+
+
+@hookspec(historic=True)
+def pytest_configure(config: "Config") -> None:
+    """Allow plugins and conftest files to perform initial configuration.
+
+    This hook is called for every plugin and initial conftest file
+    after command line options have been parsed.
+
+    After that, the hook is called for other conftest files as they are
+    imported.
+
+    .. note::
+        This hook is incompatible with ``hookwrapper=True``.
+
+    :param pytest.Config config: The pytest config object.
+    """
+
+
+# -------------------------------------------------------------------------
+# Bootstrapping hooks called for plugins registered early enough:
+# internal and 3rd party plugins.
+# -------------------------------------------------------------------------
+
+
+@hookspec(firstresult=True)
+def pytest_cmdline_parse(
+    pluginmanager: "PytestPluginManager", args: List[str]
+) -> Optional["Config"]:
+    """Return an initialized :class:`~pytest.Config`, parsing the specified args.
+
+    Stops at first non-None result, see :ref:`firstresult`.
+
+    .. note::
+        This hook will only be called for plugin classes passed to the
+        ``plugins`` arg when using `pytest.main`_ to perform an in-process
+        test run.
+
+    :param pluginmanager: The pytest plugin manager.
+    :param args: List of arguments passed on the command line.
+    :returns: A pytest config object.
+    """
+
+
+@hookspec(warn_on_impl=WARNING_CMDLINE_PREPARSE_HOOK)
+def pytest_cmdline_preparse(config: "Config", args: List[str]) -> None:
+    """(**Deprecated**) modify command line arguments before option parsing.
+
+    This hook is considered deprecated and will be removed in a future pytest version. Consider
+    using :hook:`pytest_load_initial_conftests` instead.
+
+    .. note::
+        This hook will not be called for ``conftest.py`` files, only for setuptools plugins.
+
+    :param config: The pytest config object.
+    :param args: Arguments passed on the command line.
+    """
+
+
+@hookspec(firstresult=True)
+def pytest_cmdline_main(config: "Config") -> Optional[Union["ExitCode", int]]:
+    """Called for performing the main command line action. The default
+    implementation will invoke the configure hooks and runtest_mainloop.
+
+    Stops at first non-None result, see :ref:`firstresult`.
+
+    :param config: The pytest config object.
+    :returns: The exit code.
+    """
+
+
+def pytest_load_initial_conftests(
+    early_config: "Config", parser: "Parser", args: List[str]
+) -> None:
+    """Called to implement the loading of initial conftest files ahead
+    of command line option parsing.
+
+    .. note::
+        This hook will not be called for ``conftest.py`` files, only for setuptools plugins.
+
+    :param early_config: The pytest config object.
+    :param args: Arguments passed on the command line.
+    :param parser: To add command line options.
+    """
+
+
+# -------------------------------------------------------------------------
+# collection hooks
+# -------------------------------------------------------------------------
+
+
+@hookspec(firstresult=True)
+def pytest_collection(session: "Session") -> Optional[object]:
+    """Perform the collection phase for the given session.
+
+    Stops at first non-None result, see :ref:`firstresult`.
+    The return value is not used, but only stops further processing.
+
+    The default collection phase is this (see individual hooks for full details):
+
+    1. Starting from ``session`` as the initial collector:
+
+      1. ``pytest_collectstart(collector)``
+      2. ``report = pytest_make_collect_report(collector)``
+      3. ``pytest_exception_interact(collector, call, report)`` if an interactive exception occurred
+      4. For each collected node:
+
+        1. If an item, ``pytest_itemcollected(item)``
+        2. If a collector, recurse into it.
+
+      5. ``pytest_collectreport(report)``
+
+    2. ``pytest_collection_modifyitems(session, config, items)``
+
+      1. ``pytest_deselected(items)`` for any deselected items (may be called multiple times)
+
+    3. ``pytest_collection_finish(session)``
+    4. Set ``session.items`` to the list of collected items
+    5. Set ``session.testscollected`` to the number of collected items
+
+    You can implement this hook to only perform some action before collection,
+    for example the terminal plugin uses it to start displaying the collection
+    counter (and returns `None`).
+
+    :param session: The pytest session object.
+    """
+
+
+def pytest_collection_modifyitems(
+    session: "Session", config: "Config", items: List["Item"]
+) -> None:
+    """Called after collection has been performed. May filter or re-order
+    the items in-place.
+
+    :param session: The pytest session object.
+    :param config: The pytest config object.
+    :param items: List of item objects.
+    """
+
+
+def pytest_collection_finish(session: "Session") -> None:
+    """Called after collection has been performed and modified.
+
+    :param session: The pytest session object.
+    """
+
+
+@hookspec(firstresult=True)
+def pytest_ignore_collect(
+    collection_path: Path, path: "LEGACY_PATH", config: "Config"
+) -> Optional[bool]:
+    """Return True to prevent considering this path for collection.
+
+    This hook is consulted for all files and directories prior to calling
+    more specific hooks.
+
+    Stops at first non-None result, see :ref:`firstresult`.
+
+    :param collection_path: The path to analyze.
+    :param path: The path to analyze (deprecated).
+    :param config: The pytest config object.
+
+    .. versionchanged:: 7.0.0
+        The ``collection_path`` parameter was added as a :class:`pathlib.Path`
+        equivalent of the ``path`` parameter. The ``path`` parameter
+        has been deprecated.
+    """
+
+
+def pytest_collect_file(
+    file_path: Path, path: "LEGACY_PATH", parent: "Collector"
+) -> "Optional[Collector]":
+    """Create a :class:`~pytest.Collector` for the given path, or None if not relevant.
+
+    The new node needs to have the specified ``parent`` as a parent.
+
+    :param file_path: The path to analyze.
+    :param path: The path to collect (deprecated).
+
+    .. versionchanged:: 7.0.0
+        The ``file_path`` parameter was added as a :class:`pathlib.Path`
+        equivalent of the ``path`` parameter. The ``path`` parameter
+        has been deprecated.
+    """
+
+
+# logging hooks for collection
+
+
+def pytest_collectstart(collector: "Collector") -> None:
+    """Collector starts collecting.
+
+    :param collector:
+        The collector.
+    """
+
+
+def pytest_itemcollected(item: "Item") -> None:
+    """We just collected a test item.
+
+    :param item:
+        The item.
+    """
+
+
+def pytest_collectreport(report: "CollectReport") -> None:
+    """Collector finished collecting.
+
+    :param report:
+        The collect report.
+    """
+
+
+def pytest_deselected(items: Sequence["Item"]) -> None:
+    """Called for deselected test items, e.g. by keyword.
+
+    May be called multiple times.
+
+    :param items:
+        The items.
+    """
+
+
+@hookspec(firstresult=True)
+def pytest_make_collect_report(collector: "Collector") -> "Optional[CollectReport]":
+    """Perform :func:`collector.collect() <pytest.Collector.collect>` and return
+    a :class:`~pytest.CollectReport`.
+
+    Stops at first non-None result, see :ref:`firstresult`.
+
+    :param collector:
+        The collector.
+    """
+
+
+# -------------------------------------------------------------------------
+# Python test function related hooks
+# -------------------------------------------------------------------------
+
+
+@hookspec(firstresult=True)
+def pytest_pycollect_makemodule(
+    module_path: Path, path: "LEGACY_PATH", parent
+) -> Optional["Module"]:
+    """Return a :class:`pytest.Module` collector or None for the given path.
+
+    This hook will be called for each matching test module path.
+    The :hook:`pytest_collect_file` hook needs to be used if you want to
+    create test modules for files that do not match as a test module.
+
+    Stops at first non-None result, see :ref:`firstresult`.
+
+    :param module_path: The path of the module to collect.
+    :param path: The path of the module to collect (deprecated).
+
+    .. versionchanged:: 7.0.0
+        The ``module_path`` parameter was added as a :class:`pathlib.Path`
+        equivalent of the ``path`` parameter.
+
+        The ``path`` parameter has been deprecated in favor of ``fspath``.
+    """
+
+
+@hookspec(firstresult=True)
+def pytest_pycollect_makeitem(
+    collector: Union["Module", "Class"], name: str, obj: object
+) -> Union[None, "Item", "Collector", List[Union["Item", "Collector"]]]:
+    """Return a custom item/collector for a Python object in a module, or None.
+
+    Stops at first non-None result, see :ref:`firstresult`.
+
+    :param collector:
+        The module/class collector.
+    :param name:
+        The name of the object in the module/class.
+    :param obj:
+        The object.
+    :returns:
+        The created items/collectors.
+    """
+
+
+@hookspec(firstresult=True)
+def pytest_pyfunc_call(pyfuncitem: "Function") -> Optional[object]:
+    """Call underlying test function.
+
+    Stops at first non-None result, see :ref:`firstresult`.
+
+    :param pyfuncitem:
+        The function item.
+    """
+
+
+def pytest_generate_tests(metafunc: "Metafunc") -> None:
+    """Generate (multiple) parametrized calls to a test function.
+
+    :param metafunc:
+        The :class:`~pytest.Metafunc` helper for the test function.
+    """
+
+
+@hookspec(firstresult=True)
+def pytest_make_parametrize_id(
+    config: "Config", val: object, argname: str
+) -> Optional[str]:
+    """Return a user-friendly string representation of the given ``val``
+    that will be used by @pytest.mark.parametrize calls, or None if the hook
+    doesn't know about ``val``.
+
+    The parameter name is available as ``argname``, if required.
+
+    Stops at first non-None result, see :ref:`firstresult`.
+
+    :param config: The pytest config object.
+    :param val: The parametrized value.
+    :param str argname: The automatic parameter name produced by pytest.
+    """
+
+
+# -------------------------------------------------------------------------
+# runtest related hooks
+# -------------------------------------------------------------------------
+
+
+@hookspec(firstresult=True)
+def pytest_runtestloop(session: "Session") -> Optional[object]:
+    """Perform the main runtest loop (after collection finished).
+
+    The default hook implementation performs the runtest protocol for all items
+    collected in the session (``session.items``), unless the collection failed
+    or the ``collectonly`` pytest option is set.
+
+    If at any point :py:func:`pytest.exit` is called, the loop is
+    terminated immediately.
+
+    If at any point ``session.shouldfail`` or ``session.shouldstop`` are set, the
+    loop is terminated after the runtest protocol for the current item is finished.
+
+    :param session: The pytest session object.
+
+    Stops at first non-None result, see :ref:`firstresult`.
+    The return value is not used, but only stops further processing.
+    """
+
+
+@hookspec(firstresult=True)
+def pytest_runtest_protocol(
+    item: "Item", nextitem: "Optional[Item]"
+) -> Optional[object]:
+    """Perform the runtest protocol for a single test item.
+
+    The default runtest protocol is this (see individual hooks for full details):
+
+    - ``pytest_runtest_logstart(nodeid, location)``
+
+    - Setup phase:
+        - ``call = pytest_runtest_setup(item)`` (wrapped in ``CallInfo(when="setup")``)
+        - ``report = pytest_runtest_makereport(item, call)``
+        - ``pytest_runtest_logreport(report)``
+        - ``pytest_exception_interact(call, report)`` if an interactive exception occurred
+
+    - Call phase, if the the setup passed and the ``setuponly`` pytest option is not set:
+        - ``call = pytest_runtest_call(item)`` (wrapped in ``CallInfo(when="call")``)
+        - ``report = pytest_runtest_makereport(item, call)``
+        - ``pytest_runtest_logreport(report)``
+        - ``pytest_exception_interact(call, report)`` if an interactive exception occurred
+
+    - Teardown phase:
+        - ``call = pytest_runtest_teardown(item, nextitem)`` (wrapped in ``CallInfo(when="teardown")``)
+        - ``report = pytest_runtest_makereport(item, call)``
+        - ``pytest_runtest_logreport(report)``
+        - ``pytest_exception_interact(call, report)`` if an interactive exception occurred
+
+    - ``pytest_runtest_logfinish(nodeid, location)``
+
+    :param item: Test item for which the runtest protocol is performed.
+    :param nextitem: The scheduled-to-be-next test item (or None if this is the end my friend).
+
+    Stops at first non-None result, see :ref:`firstresult`.
+    The return value is not used, but only stops further processing.
+    """
+
+
+def pytest_runtest_logstart(
+    nodeid: str, location: Tuple[str, Optional[int], str]
+) -> None:
+    """Called at the start of running the runtest protocol for a single item.
+
+    See :hook:`pytest_runtest_protocol` for a description of the runtest protocol.
+
+    :param nodeid: Full node ID of the item.
+    :param location: A tuple of ``(filename, lineno, testname)``
+        where ``filename`` is a file path relative to ``config.rootpath``
+        and ``lineno`` is 0-based.
+    """
+
+
+def pytest_runtest_logfinish(
+    nodeid: str, location: Tuple[str, Optional[int], str]
+) -> None:
+    """Called at the end of running the runtest protocol for a single item.
+
+    See :hook:`pytest_runtest_protocol` for a description of the runtest protocol.
+
+    :param nodeid: Full node ID of the item.
+    :param location: A tuple of ``(filename, lineno, testname)``
+        where ``filename`` is a file path relative to ``config.rootpath``
+        and ``lineno`` is 0-based.
+    """
+
+
+def pytest_runtest_setup(item: "Item") -> None:
+    """Called to perform the setup phase for a test item.
+
+    The default implementation runs ``setup()`` on ``item`` and all of its
+    parents (which haven't been setup yet). This includes obtaining the
+    values of fixtures required by the item (which haven't been obtained
+    yet).
+
+    :param item:
+        The item.
+    """
+
+
+def pytest_runtest_call(item: "Item") -> None:
+    """Called to run the test for test item (the call phase).
+
+    The default implementation calls ``item.runtest()``.
+
+    :param item:
+        The item.
+    """
+
+
+def pytest_runtest_teardown(item: "Item", nextitem: Optional["Item"]) -> None:
+    """Called to perform the teardown phase for a test item.
+
+    The default implementation runs the finalizers and calls ``teardown()``
+    on ``item`` and all of its parents (which need to be torn down). This
+    includes running the teardown phase of fixtures required by the item (if
+    they go out of scope).
+
+    :param item:
+        The item.
+    :param nextitem:
+        The scheduled-to-be-next test item (None if no further test item is
+        scheduled). This argument is used to perform exact teardowns, i.e.
+        calling just enough finalizers so that nextitem only needs to call
+        setup functions.
+    """
+
+
+@hookspec(firstresult=True)
+def pytest_runtest_makereport(
+    item: "Item", call: "CallInfo[None]"
+) -> Optional["TestReport"]:
+    """Called to create a :class:`~pytest.TestReport` for each of
+    the setup, call and teardown runtest phases of a test item.
+
+    See :hook:`pytest_runtest_protocol` for a description of the runtest protocol.
+
+    :param item: The item.
+    :param call: The :class:`~pytest.CallInfo` for the phase.
+
+    Stops at first non-None result, see :ref:`firstresult`.
+    """
+
+
+def pytest_runtest_logreport(report: "TestReport") -> None:
+    """Process the :class:`~pytest.TestReport` produced for each
+    of the setup, call and teardown runtest phases of an item.
+
+    See :hook:`pytest_runtest_protocol` for a description of the runtest protocol.
+    """
+
+
+@hookspec(firstresult=True)
+def pytest_report_to_serializable(
+    config: "Config",
+    report: Union["CollectReport", "TestReport"],
+) -> Optional[Dict[str, Any]]:
+    """Serialize the given report object into a data structure suitable for
+    sending over the wire, e.g. converted to JSON.
+
+    :param config: The pytest config object.
+    :param report: The report.
+    """
+
+
+@hookspec(firstresult=True)
+def pytest_report_from_serializable(
+    config: "Config",
+    data: Dict[str, Any],
+) -> Optional[Union["CollectReport", "TestReport"]]:
+    """Restore a report object previously serialized with
+    :hook:`pytest_report_to_serializable`.
+
+    :param config: The pytest config object.
+    """
+
+
+# -------------------------------------------------------------------------
+# Fixture related hooks
+# -------------------------------------------------------------------------
+
+
+@hookspec(firstresult=True)
+def pytest_fixture_setup(
+    fixturedef: "FixtureDef[Any]", request: "SubRequest"
+) -> Optional[object]:
+    """Perform fixture setup execution.
+
+    :param fixturdef:
+        The fixture definition object.
+    :param request:
+        The fixture request object.
+    :returns:
+        The return value of the call to the fixture function.
+
+    Stops at first non-None result, see :ref:`firstresult`.
+
+    .. note::
+        If the fixture function returns None, other implementations of
+        this hook function will continue to be called, according to the
+        behavior of the :ref:`firstresult` option.
+    """
+
+
+def pytest_fixture_post_finalizer(
+    fixturedef: "FixtureDef[Any]", request: "SubRequest"
+) -> None:
+    """Called after fixture teardown, but before the cache is cleared, so
+    the fixture result ``fixturedef.cached_result`` is still available (not
+    ``None``).
+
+    :param fixturdef:
+        The fixture definition object.
+    :param request:
+        The fixture request object.
+    """
+
+
+# -------------------------------------------------------------------------
+# test session related hooks
+# -------------------------------------------------------------------------
+
+
+def pytest_sessionstart(session: "Session") -> None:
+    """Called after the ``Session`` object has been created and before performing collection
+    and entering the run test loop.
+
+    :param session: The pytest session object.
+    """
+
+
+def pytest_sessionfinish(
+    session: "Session",
+    exitstatus: Union[int, "ExitCode"],
+) -> None:
+    """Called after whole test run finished, right before returning the exit status to the system.
+
+    :param session: The pytest session object.
+    :param exitstatus: The status which pytest will return to the system.
+    """
+
+
+def pytest_unconfigure(config: "Config") -> None:
+    """Called before test process is exited.
+
+    :param config: The pytest config object.
+    """
+
+
+# -------------------------------------------------------------------------
+# hooks for customizing the assert methods
+# -------------------------------------------------------------------------
+
+
+def pytest_assertrepr_compare(
+    config: "Config", op: str, left: object, right: object
+) -> Optional[List[str]]:
+    """Return explanation for comparisons in failing assert expressions.
+
+    Return None for no custom explanation, otherwise return a list
+    of strings. The strings will be joined by newlines but any newlines
+    *in* a string will be escaped. Note that all but the first line will
+    be indented slightly, the intention is for the first line to be a summary.
+
+    :param config: The pytest config object.
+    :param op: The operator, e.g. `"=="`, `"!="`, `"not in"`.
+    :param left: The left operand.
+    :param right: The right operand.
+    """
+
+
+def pytest_assertion_pass(item: "Item", lineno: int, orig: str, expl: str) -> None:
+    """Called whenever an assertion passes.
+
+    .. versionadded:: 5.0
+
+    Use this hook to do some processing after a passing assertion.
+    The original assertion information is available in the `orig` string
+    and the pytest introspected assertion information is available in the
+    `expl` string.
+
+    This hook must be explicitly enabled by the ``enable_assertion_pass_hook``
+    ini-file option:
+
+    .. code-block:: ini
+
+        [pytest]
+        enable_assertion_pass_hook=true
+
+    You need to **clean the .pyc** files in your project directory and interpreter libraries
+    when enabling this option, as assertions will require to be re-written.
+
+    :param item: pytest item object of current test.
+    :param lineno: Line number of the assert statement.
+    :param orig: String with the original assertion.
+    :param expl: String with the assert explanation.
+    """
+
+
+# -------------------------------------------------------------------------
+# Hooks for influencing reporting (invoked from _pytest_terminal).
+# -------------------------------------------------------------------------
+
+
+def pytest_report_header(  # type:ignore[empty-body]
+    config: "Config", start_path: Path, startdir: "LEGACY_PATH"
+) -> Union[str, List[str]]:
+    """Return a string or list of strings to be displayed as header info for terminal reporting.
+
+    :param config: The pytest config object.
+    :param start_path: The starting dir.
+    :param startdir: The starting dir (deprecated).
+
+    .. note::
+
+        Lines returned by a plugin are displayed before those of plugins which
+        ran before it.
+        If you want to have your line(s) displayed first, use
+        :ref:`trylast=True <plugin-hookorder>`.
+
+    .. note::
+
+        This function should be implemented only in plugins or ``conftest.py``
+        files situated at the tests root directory due to how pytest
+        :ref:`discovers plugins during startup <pluginorder>`.
+
+    .. versionchanged:: 7.0.0
+        The ``start_path`` parameter was added as a :class:`pathlib.Path`
+        equivalent of the ``startdir`` parameter. The ``startdir`` parameter
+        has been deprecated.
+    """
+
+
+def pytest_report_collectionfinish(  # type:ignore[empty-body]
+    config: "Config",
+    start_path: Path,
+    startdir: "LEGACY_PATH",
+    items: Sequence["Item"],
+) -> Union[str, List[str]]:
+    """Return a string or list of strings to be displayed after collection
+    has finished successfully.
+
+    These strings will be displayed after the standard "collected X items" message.
+
+    .. versionadded:: 3.2
+
+    :param config: The pytest config object.
+    :param start_path: The starting dir.
+    :param startdir: The starting dir (deprecated).
+    :param items: List of pytest items that are going to be executed; this list should not be modified.
+
+    .. note::
+
+        Lines returned by a plugin are displayed before those of plugins which
+        ran before it.
+        If you want to have your line(s) displayed first, use
+        :ref:`trylast=True <plugin-hookorder>`.
+
+    .. versionchanged:: 7.0.0
+        The ``start_path`` parameter was added as a :class:`pathlib.Path`
+        equivalent of the ``startdir`` parameter. The ``startdir`` parameter
+        has been deprecated.
+    """
+
+
+@hookspec(firstresult=True)
+def pytest_report_teststatus(  # type:ignore[empty-body]
+    report: Union["CollectReport", "TestReport"], config: "Config"
+) -> "TestShortLogReport | Tuple[str, str, Union[str, Tuple[str, Mapping[str, bool]]]]":
+    """Return result-category, shortletter and verbose word for status
+    reporting.
+
+    The result-category is a category in which to count the result, for
+    example "passed", "skipped", "error" or the empty string.
+
+    The shortletter is shown as testing progresses, for example ".", "s",
+    "E" or the empty string.
+
+    The verbose word is shown as testing progresses in verbose mode, for
+    example "PASSED", "SKIPPED", "ERROR" or the empty string.
+
+    pytest may style these implicitly according to the report outcome.
+    To provide explicit styling, return a tuple for the verbose word,
+    for example ``"rerun", "R", ("RERUN", {"yellow": True})``.
+
+    :param report: The report object whose status is to be returned.
+    :param config: The pytest config object.
+    :returns: The test status.
+
+    Stops at first non-None result, see :ref:`firstresult`.
+    """
+
+
+def pytest_terminal_summary(
+    terminalreporter: "TerminalReporter",
+    exitstatus: "ExitCode",
+    config: "Config",
+) -> None:
+    """Add a section to terminal summary reporting.
+
+    :param terminalreporter: The internal terminal reporter object.
+    :param exitstatus: The exit status that will be reported back to the OS.
+    :param config: The pytest config object.
+
+    .. versionadded:: 4.2
+        The ``config`` parameter.
+    """
+
+
+@hookspec(historic=True)
+def pytest_warning_recorded(
+    warning_message: "warnings.WarningMessage",
+    when: "Literal['config', 'collect', 'runtest']",
+    nodeid: str,
+    location: Optional[Tuple[str, int, str]],
+) -> None:
+    """Process a warning captured by the internal pytest warnings plugin.
+
+    :param warning_message:
+        The captured warning. This is the same object produced by :py:func:`warnings.catch_warnings`, and contains
+        the same attributes as the parameters of :py:func:`warnings.showwarning`.
+
+    :param when:
+        Indicates when the warning was captured. Possible values:
+
+        * ``"config"``: during pytest configuration/initialization stage.
+        * ``"collect"``: during test collection.
+        * ``"runtest"``: during test execution.
+
+    :param nodeid:
+        Full id of the item.
+
+    :param location:
+        When available, holds information about the execution context of the captured
+        warning (filename, linenumber, function). ``function`` evaluates to <module>
+        when the execution context is at the module level.
+
+    .. versionadded:: 6.0
+    """
+
+
+# -------------------------------------------------------------------------
+# Hooks for influencing skipping
+# -------------------------------------------------------------------------
+
+
+def pytest_markeval_namespace(  # type:ignore[empty-body]
+    config: "Config",
+) -> Dict[str, Any]:
+    """Called when constructing the globals dictionary used for
+    evaluating string conditions in xfail/skipif markers.
+
+    This is useful when the condition for a marker requires
+    objects that are expensive or impossible to obtain during
+    collection time, which is required by normal boolean
+    conditions.
+
+    .. versionadded:: 6.2
+
+    :param config: The pytest config object.
+    :returns: A dictionary of additional globals to add.
+    """
+
+
+# -------------------------------------------------------------------------
+# error handling and internal debugging hooks
+# -------------------------------------------------------------------------
+
+
+def pytest_internalerror(
+    excrepr: "ExceptionRepr",
+    excinfo: "ExceptionInfo[BaseException]",
+) -> Optional[bool]:
+    """Called for internal errors.
+
+    Return True to suppress the fallback handling of printing an
+    INTERNALERROR message directly to sys.stderr.
+
+    :param excrepr: The exception repr object.
+    :param excinfo: The exception info.
+    """
+
+
+def pytest_keyboard_interrupt(
+    excinfo: "ExceptionInfo[Union[KeyboardInterrupt, Exit]]",
+) -> None:
+    """Called for keyboard interrupt.
+
+    :param excinfo: The exception info.
+    """
+
+
+def pytest_exception_interact(
+    node: Union["Item", "Collector"],
+    call: "CallInfo[Any]",
+    report: Union["CollectReport", "TestReport"],
+) -> None:
+    """Called when an exception was raised which can potentially be
+    interactively handled.
+
+    May be called during collection (see :hook:`pytest_make_collect_report`),
+    in which case ``report`` is a :class:`CollectReport`.
+
+    May be called during runtest of an item (see :hook:`pytest_runtest_protocol`),
+    in which case ``report`` is a :class:`TestReport`.
+
+    This hook is not called if the exception that was raised is an internal
+    exception like ``skip.Exception``.
+
+    :param node:
+        The item or collector.
+    :param call:
+        The call information. Contains the exception.
+    :param report:
+        The collection or test report.
+    """
+
+
+def pytest_enter_pdb(config: "Config", pdb: "pdb.Pdb") -> None:
+    """Called upon pdb.set_trace().
+
+    Can be used by plugins to take special action just before the python
+    debugger enters interactive mode.
+
+    :param config: The pytest config object.
+    :param pdb: The Pdb instance.
+    """
+
+
+def pytest_leave_pdb(config: "Config", pdb: "pdb.Pdb") -> None:
+    """Called when leaving pdb (e.g. with continue after pdb.set_trace()).
+
+    Can be used by plugins to take special action just after the python
+    debugger leaves interactive mode.
+
+    :param config: The pytest config object.
+    :param pdb: The Pdb instance.
+    """
diff --git a/contrib/python/pytest/py3/_pytest/junitxml.py b/contrib/python/pytest/py3/_pytest/junitxml.py
new file mode 100644
index 0000000000..ed259e4c41
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/junitxml.py
@@ -0,0 +1,700 @@
+"""Report test results in JUnit-XML format, for use with Jenkins and build
+integration servers.
+
+Based on initial code from Ross Lawley.
+
+Output conforms to
+https://github.com/jenkinsci/xunit-plugin/blob/master/src/main/resources/org/jenkinsci/plugins/xunit/types/model/xsd/junit-10.xsd
+"""
+import functools
+import os
+import platform
+import re
+import xml.etree.ElementTree as ET
+from datetime import datetime
+from typing import Callable
+from typing import Dict
+from typing import List
+from typing import Match
+from typing import Optional
+from typing import Tuple
+from typing import Union
+
+import pytest
+from _pytest import nodes
+from _pytest import timing
+from _pytest._code.code import ExceptionRepr
+from _pytest._code.code import ReprFileLocation
+from _pytest.config import Config
+from _pytest.config import filename_arg
+from _pytest.config.argparsing import Parser
+from _pytest.fixtures import FixtureRequest
+from _pytest.reports import TestReport
+from _pytest.stash import StashKey
+from _pytest.terminal import TerminalReporter
+
+
+xml_key = StashKey["LogXML"]()
+
+
+def bin_xml_escape(arg: object) -> str:
+    r"""Visually escape invalid XML characters.
+
+    For example, transforms
+        'hello\aworld\b'
+    into
+        'hello#x07world#x08'
+    Note that the #xABs are *not* XML escapes - missing the ampersand &#xAB.
+    The idea is to escape visually for the user rather than for XML itself.
+    """
+
+    def repl(matchobj: Match[str]) -> str:
+        i = ord(matchobj.group())
+        if i <= 0xFF:
+            return "#x%02X" % i
+        else:
+            return "#x%04X" % i
+
+    # The spec range of valid chars is:
+    # Char ::= #x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF]
+    # For an unknown(?) reason, we disallow #x7F (DEL) as well.
+    illegal_xml_re = (
+        "[^\u0009\u000A\u000D\u0020-\u007E\u0080-\uD7FF\uE000-\uFFFD\u10000-\u10FFFF]"
+    )
+    return re.sub(illegal_xml_re, repl, str(arg))
+
+
+def merge_family(left, right) -> None:
+    result = {}
+    for kl, vl in left.items():
+        for kr, vr in right.items():
+            if not isinstance(vl, list):
+                raise TypeError(type(vl))
+            result[kl] = vl + vr
+    left.update(result)
+
+
+families = {}
+families["_base"] = {"testcase": ["classname", "name"]}
+families["_base_legacy"] = {"testcase": ["file", "line", "url"]}
+
+# xUnit 1.x inherits legacy attributes.
+families["xunit1"] = families["_base"].copy()
+merge_family(families["xunit1"], families["_base_legacy"])
+
+# xUnit 2.x uses strict base attributes.
+families["xunit2"] = families["_base"]
+
+
+class _NodeReporter:
+    def __init__(self, nodeid: Union[str, TestReport], xml: "LogXML") -> None:
+        self.id = nodeid
+        self.xml = xml
+        self.add_stats = self.xml.add_stats
+        self.family = self.xml.family
+        self.duration = 0.0
+        self.properties: List[Tuple[str, str]] = []
+        self.nodes: List[ET.Element] = []
+        self.attrs: Dict[str, str] = {}
+
+    def append(self, node: ET.Element) -> None:
+        self.xml.add_stats(node.tag)
+        self.nodes.append(node)
+
+    def add_property(self, name: str, value: object) -> None:
+        self.properties.append((str(name), bin_xml_escape(value)))
+
+    def add_attribute(self, name: str, value: object) -> None:
+        self.attrs[str(name)] = bin_xml_escape(value)
+
+    def make_properties_node(self) -> Optional[ET.Element]:
+        """Return a Junit node containing custom properties, if any."""
+        if self.properties:
+            properties = ET.Element("properties")
+            for name, value in self.properties:
+                properties.append(ET.Element("property", name=name, value=value))
+            return properties
+        return None
+
+    def record_testreport(self, testreport: TestReport) -> None:
+        names = mangle_test_address(testreport.nodeid)
+        existing_attrs = self.attrs
+        classnames = names[:-1]
+        if self.xml.prefix:
+            classnames.insert(0, self.xml.prefix)
+        attrs: Dict[str, str] = {
+            "classname": ".".join(classnames),
+            "name": bin_xml_escape(names[-1]),
+            "file": testreport.location[0],
+        }
+        if testreport.location[1] is not None:
+            attrs["line"] = str(testreport.location[1])
+        if hasattr(testreport, "url"):
+            attrs["url"] = testreport.url
+        self.attrs = attrs
+        self.attrs.update(existing_attrs)  # Restore any user-defined attributes.
+
+        # Preserve legacy testcase behavior.
+        if self.family == "xunit1":
+            return
+
+        # Filter out attributes not permitted by this test family.
+        # Including custom attributes because they are not valid here.
+        temp_attrs = {}
+        for key in self.attrs.keys():
+            if key in families[self.family]["testcase"]:
+                temp_attrs[key] = self.attrs[key]
+        self.attrs = temp_attrs
+
+    def to_xml(self) -> ET.Element:
+        testcase = ET.Element("testcase", self.attrs, time="%.3f" % self.duration)
+        properties = self.make_properties_node()
+        if properties is not None:
+            testcase.append(properties)
+        testcase.extend(self.nodes)
+        return testcase
+
+    def _add_simple(self, tag: str, message: str, data: Optional[str] = None) -> None:
+        node = ET.Element(tag, message=message)
+        node.text = bin_xml_escape(data)
+        self.append(node)
+
+    def write_captured_output(self, report: TestReport) -> None:
+        if not self.xml.log_passing_tests and report.passed:
+            return
+
+        content_out = report.capstdout
+        content_log = report.caplog
+        content_err = report.capstderr
+        if self.xml.logging == "no":
+            return
+        content_all = ""
+        if self.xml.logging in ["log", "all"]:
+            content_all = self._prepare_content(content_log, " Captured Log ")
+        if self.xml.logging in ["system-out", "out-err", "all"]:
+            content_all += self._prepare_content(content_out, " Captured Out ")
+            self._write_content(report, content_all, "system-out")
+            content_all = ""
+        if self.xml.logging in ["system-err", "out-err", "all"]:
+            content_all += self._prepare_content(content_err, " Captured Err ")
+            self._write_content(report, content_all, "system-err")
+            content_all = ""
+        if content_all:
+            self._write_content(report, content_all, "system-out")
+
+    def _prepare_content(self, content: str, header: str) -> str:
+        return "\n".join([header.center(80, "-"), content, ""])
+
+    def _write_content(self, report: TestReport, content: str, jheader: str) -> None:
+        tag = ET.Element(jheader)
+        tag.text = bin_xml_escape(content)
+        self.append(tag)
+
+    def append_pass(self, report: TestReport) -> None:
+        self.add_stats("passed")
+
+    def append_failure(self, report: TestReport) -> None:
+        # msg = str(report.longrepr.reprtraceback.extraline)
+        if hasattr(report, "wasxfail"):
+            self._add_simple("skipped", "xfail-marked test passes unexpectedly")
+        else:
+            assert report.longrepr is not None
+            reprcrash: Optional[ReprFileLocation] = getattr(
+                report.longrepr, "reprcrash", None
+            )
+            if reprcrash is not None:
+                message = reprcrash.message
+            else:
+                message = str(report.longrepr)
+            message = bin_xml_escape(message)
+            self._add_simple("failure", message, str(report.longrepr))
+
+    def append_collect_error(self, report: TestReport) -> None:
+        # msg = str(report.longrepr.reprtraceback.extraline)
+        assert report.longrepr is not None
+        self._add_simple("error", "collection failure", str(report.longrepr))
+
+    def append_collect_skipped(self, report: TestReport) -> None:
+        self._add_simple("skipped", "collection skipped", str(report.longrepr))
+
+    def append_error(self, report: TestReport) -> None:
+        assert report.longrepr is not None
+        reprcrash: Optional[ReprFileLocation] = getattr(
+            report.longrepr, "reprcrash", None
+        )
+        if reprcrash is not None:
+            reason = reprcrash.message
+        else:
+            reason = str(report.longrepr)
+
+        if report.when == "teardown":
+            msg = f'failed on teardown with "{reason}"'
+        else:
+            msg = f'failed on setup with "{reason}"'
+        self._add_simple("error", bin_xml_escape(msg), str(report.longrepr))
+
+    def append_skipped(self, report: TestReport) -> None:
+        if hasattr(report, "wasxfail"):
+            xfailreason = report.wasxfail
+            if xfailreason.startswith("reason: "):
+                xfailreason = xfailreason[8:]
+            xfailreason = bin_xml_escape(xfailreason)
+            skipped = ET.Element("skipped", type="pytest.xfail", message=xfailreason)
+            self.append(skipped)
+        else:
+            assert isinstance(report.longrepr, tuple)
+            filename, lineno, skipreason = report.longrepr
+            if skipreason.startswith("Skipped: "):
+                skipreason = skipreason[9:]
+            details = f"{filename}:{lineno}: {skipreason}"
+
+            skipped = ET.Element("skipped", type="pytest.skip", message=skipreason)
+            skipped.text = bin_xml_escape(details)
+            self.append(skipped)
+            self.write_captured_output(report)
+
+    def finalize(self) -> None:
+        data = self.to_xml()
+        self.__dict__.clear()
+        # Type ignored because mypy doesn't like overriding a method.
+        # Also the return value doesn't match...
+        self.to_xml = lambda: data  # type: ignore[assignment]
+
+
+def _warn_incompatibility_with_xunit2(
+    request: FixtureRequest, fixture_name: str
+) -> None:
+    """Emit a PytestWarning about the given fixture being incompatible with newer xunit revisions."""
+    from _pytest.warning_types import PytestWarning
+
+    xml = request.config.stash.get(xml_key, None)
+    if xml is not None and xml.family not in ("xunit1", "legacy"):
+        request.node.warn(
+            PytestWarning(
+                "{fixture_name} is incompatible with junit_family '{family}' (use 'legacy' or 'xunit1')".format(
+                    fixture_name=fixture_name, family=xml.family
+                )
+            )
+        )
+
+
+@pytest.fixture
+def record_property(request: FixtureRequest) -> Callable[[str, object], None]:
+    """Add extra properties to the calling test.
+
+    User properties become part of the test report and are available to the
+    configured reporters, like JUnit XML.
+
+    The fixture is callable with ``name, value``. The value is automatically
+    XML-encoded.
+
+    Example::
+
+        def test_function(record_property):
+            record_property("example_key", 1)
+    """
+    _warn_incompatibility_with_xunit2(request, "record_property")
+
+    def append_property(name: str, value: object) -> None:
+        request.node.user_properties.append((name, value))
+
+    return append_property
+
+
+@pytest.fixture
+def record_xml_attribute(request: FixtureRequest) -> Callable[[str, object], None]:
+    """Add extra xml attributes to the tag for the calling test.
+
+    The fixture is callable with ``name, value``. The value is
+    automatically XML-encoded.
+    """
+    from _pytest.warning_types import PytestExperimentalApiWarning
+
+    request.node.warn(
+        PytestExperimentalApiWarning("record_xml_attribute is an experimental feature")
+    )
+
+    _warn_incompatibility_with_xunit2(request, "record_xml_attribute")
+
+    # Declare noop
+    def add_attr_noop(name: str, value: object) -> None:
+        pass
+
+    attr_func = add_attr_noop
+
+    xml = request.config.stash.get(xml_key, None)
+    if xml is not None:
+        node_reporter = xml.node_reporter(request.node.nodeid)
+        attr_func = node_reporter.add_attribute
+
+    return attr_func
+
+
+def _check_record_param_type(param: str, v: str) -> None:
+    """Used by record_testsuite_property to check that the given parameter name is of the proper
+    type."""
+    __tracebackhide__ = True
+    if not isinstance(v, str):
+        msg = "{param} parameter needs to be a string, but {g} given"  # type: ignore[unreachable]
+        raise TypeError(msg.format(param=param, g=type(v).__name__))
+
+
+@pytest.fixture(scope="session")
+def record_testsuite_property(request: FixtureRequest) -> Callable[[str, object], None]:
+    """Record a new ``<property>`` tag as child of the root ``<testsuite>``.
+
+    This is suitable to writing global information regarding the entire test
+    suite, and is compatible with ``xunit2`` JUnit family.
+
+    This is a ``session``-scoped fixture which is called with ``(name, value)``. Example:
+
+    .. code-block:: python
+
+        def test_foo(record_testsuite_property):
+            record_testsuite_property("ARCH", "PPC")
+            record_testsuite_property("STORAGE_TYPE", "CEPH")
+
+    :param name:
+        The property name.
+    :param value:
+        The property value. Will be converted to a string.
+
+    .. warning::
+
+        Currently this fixture **does not work** with the
+        `pytest-xdist <https://github.com/pytest-dev/pytest-xdist>`__ plugin. See
+        :issue:`7767` for details.
+    """
+
+    __tracebackhide__ = True
+
+    def record_func(name: str, value: object) -> None:
+        """No-op function in case --junitxml was not passed in the command-line."""
+        __tracebackhide__ = True
+        _check_record_param_type("name", name)
+
+    xml = request.config.stash.get(xml_key, None)
+    if xml is not None:
+        record_func = xml.add_global_property  # noqa
+    return record_func
+
+
+def pytest_addoption(parser: Parser) -> None:
+    group = parser.getgroup("terminal reporting")
+    group.addoption(
+        "--junitxml",
+        "--junit-xml",
+        action="store",
+        dest="xmlpath",
+        metavar="path",
+        type=functools.partial(filename_arg, optname="--junitxml"),
+        default=None,
+        help="Create junit-xml style report file at given path",
+    )
+    group.addoption(
+        "--junitprefix",
+        "--junit-prefix",
+        action="store",
+        metavar="str",
+        default=None,
+        help="Prepend prefix to classnames in junit-xml output",
+    )
+    parser.addini(
+        "junit_suite_name", "Test suite name for JUnit report", default="pytest"
+    )
+    parser.addini(
+        "junit_logging",
+        "Write captured log messages to JUnit report: "
+        "one of no|log|system-out|system-err|out-err|all",
+        default="no",
+    )
+    parser.addini(
+        "junit_log_passing_tests",
+        "Capture log information for passing tests to JUnit report: ",
+        type="bool",
+        default=True,
+    )
+    parser.addini(
+        "junit_duration_report",
+        "Duration time to report: one of total|call",
+        default="total",
+    )  # choices=['total', 'call'])
+    parser.addini(
+        "junit_family",
+        "Emit XML for schema: one of legacy|xunit1|xunit2",
+        default="xunit2",
+    )
+
+
+def pytest_configure(config: Config) -> None:
+    xmlpath = config.option.xmlpath
+    # Prevent opening xmllog on worker nodes (xdist).
+    if xmlpath and not hasattr(config, "workerinput"):
+        junit_family = config.getini("junit_family")
+        config.stash[xml_key] = LogXML(
+            xmlpath,
+            config.option.junitprefix,
+            config.getini("junit_suite_name"),
+            config.getini("junit_logging"),
+            config.getini("junit_duration_report"),
+            junit_family,
+            config.getini("junit_log_passing_tests"),
+        )
+        config.pluginmanager.register(config.stash[xml_key])
+
+
+def pytest_unconfigure(config: Config) -> None:
+    xml = config.stash.get(xml_key, None)
+    if xml:
+        del config.stash[xml_key]
+        config.pluginmanager.unregister(xml)
+
+
+def mangle_test_address(address: str) -> List[str]:
+    path, possible_open_bracket, params = address.partition("[")
+    names = path.split("::")
+    # Convert file path to dotted path.
+    names[0] = names[0].replace(nodes.SEP, ".")
+    names[0] = re.sub(r"\.py$", "", names[0])
+    # Put any params back.
+    names[-1] += possible_open_bracket + params
+    return names
+
+
+class LogXML:
+    def __init__(
+        self,
+        logfile,
+        prefix: Optional[str],
+        suite_name: str = "pytest",
+        logging: str = "no",
+        report_duration: str = "total",
+        family="xunit1",
+        log_passing_tests: bool = True,
+    ) -> None:
+        logfile = os.path.expanduser(os.path.expandvars(logfile))
+        self.logfile = os.path.normpath(os.path.abspath(logfile))
+        self.prefix = prefix
+        self.suite_name = suite_name
+        self.logging = logging
+        self.log_passing_tests = log_passing_tests
+        self.report_duration = report_duration
+        self.family = family
+        self.stats: Dict[str, int] = dict.fromkeys(
+            ["error", "passed", "failure", "skipped"], 0
+        )
+        self.node_reporters: Dict[
+            Tuple[Union[str, TestReport], object], _NodeReporter
+        ] = {}
+        self.node_reporters_ordered: List[_NodeReporter] = []
+        self.global_properties: List[Tuple[str, str]] = []
+
+        # List of reports that failed on call but teardown is pending.
+        self.open_reports: List[TestReport] = []
+        self.cnt_double_fail_tests = 0
+
+        # Replaces convenience family with real family.
+        if self.family == "legacy":
+            self.family = "xunit1"
+
+    def finalize(self, report: TestReport) -> None:
+        nodeid = getattr(report, "nodeid", report)
+        # Local hack to handle xdist report order.
+        workernode = getattr(report, "node", None)
+        reporter = self.node_reporters.pop((nodeid, workernode))
+
+        for propname, propvalue in report.user_properties:
+            reporter.add_property(propname, str(propvalue))
+
+        if reporter is not None:
+            reporter.finalize()
+
+    def node_reporter(self, report: Union[TestReport, str]) -> _NodeReporter:
+        nodeid: Union[str, TestReport] = getattr(report, "nodeid", report)
+        # Local hack to handle xdist report order.
+        workernode = getattr(report, "node", None)
+
+        key = nodeid, workernode
+
+        if key in self.node_reporters:
+            # TODO: breaks for --dist=each
+            return self.node_reporters[key]
+
+        reporter = _NodeReporter(nodeid, self)
+
+        self.node_reporters[key] = reporter
+        self.node_reporters_ordered.append(reporter)
+
+        return reporter
+
+    def add_stats(self, key: str) -> None:
+        if key in self.stats:
+            self.stats[key] += 1
+
+    def _opentestcase(self, report: TestReport) -> _NodeReporter:
+        reporter = self.node_reporter(report)
+        reporter.record_testreport(report)
+        return reporter
+
+    def pytest_runtest_logreport(self, report: TestReport) -> None:
+        """Handle a setup/call/teardown report, generating the appropriate
+        XML tags as necessary.
+
+        Note: due to plugins like xdist, this hook may be called in interlaced
+        order with reports from other nodes. For example:
+
+        Usual call order:
+            -> setup node1
+            -> call node1
+            -> teardown node1
+            -> setup node2
+            -> call node2
+            -> teardown node2
+
+        Possible call order in xdist:
+            -> setup node1
+            -> call node1
+            -> setup node2
+            -> call node2
+            -> teardown node2
+            -> teardown node1
+        """
+        close_report = None
+        if report.passed:
+            if report.when == "call":  # ignore setup/teardown
+                reporter = self._opentestcase(report)
+                reporter.append_pass(report)
+        elif report.failed:
+            if report.when == "teardown":
+                # The following vars are needed when xdist plugin is used.
+                report_wid = getattr(report, "worker_id", None)
+                report_ii = getattr(report, "item_index", None)
+                close_report = next(
+                    (
+                        rep
+                        for rep in self.open_reports
+                        if (
+                            rep.nodeid == report.nodeid
+                            and getattr(rep, "item_index", None) == report_ii
+                            and getattr(rep, "worker_id", None) == report_wid
+                        )
+                    ),
+                    None,
+                )
+                if close_report:
+                    # We need to open new testcase in case we have failure in
+                    # call and error in teardown in order to follow junit
+                    # schema.
+                    self.finalize(close_report)
+                    self.cnt_double_fail_tests += 1
+            reporter = self._opentestcase(report)
+            if report.when == "call":
+                reporter.append_failure(report)
+                self.open_reports.append(report)
+                if not self.log_passing_tests:
+                    reporter.write_captured_output(report)
+            else:
+                reporter.append_error(report)
+        elif report.skipped:
+            reporter = self._opentestcase(report)
+            reporter.append_skipped(report)
+        self.update_testcase_duration(report)
+        if report.when == "teardown":
+            reporter = self._opentestcase(report)
+            reporter.write_captured_output(report)
+
+            self.finalize(report)
+            report_wid = getattr(report, "worker_id", None)
+            report_ii = getattr(report, "item_index", None)
+            close_report = next(
+                (
+                    rep
+                    for rep in self.open_reports
+                    if (
+                        rep.nodeid == report.nodeid
+                        and getattr(rep, "item_index", None) == report_ii
+                        and getattr(rep, "worker_id", None) == report_wid
+                    )
+                ),
+                None,
+            )
+            if close_report:
+                self.open_reports.remove(close_report)
+
+    def update_testcase_duration(self, report: TestReport) -> None:
+        """Accumulate total duration for nodeid from given report and update
+        the Junit.testcase with the new total if already created."""
+        if self.report_duration == "total" or report.when == self.report_duration:
+            reporter = self.node_reporter(report)
+            reporter.duration += getattr(report, "duration", 0.0)
+
+    def pytest_collectreport(self, report: TestReport) -> None:
+        if not report.passed:
+            reporter = self._opentestcase(report)
+            if report.failed:
+                reporter.append_collect_error(report)
+            else:
+                reporter.append_collect_skipped(report)
+
+    def pytest_internalerror(self, excrepr: ExceptionRepr) -> None:
+        reporter = self.node_reporter("internal")
+        reporter.attrs.update(classname="pytest", name="internal")
+        reporter._add_simple("error", "internal error", str(excrepr))
+
+    def pytest_sessionstart(self) -> None:
+        self.suite_start_time = timing.time()
+
+    def pytest_sessionfinish(self) -> None:
+        dirname = os.path.dirname(os.path.abspath(self.logfile))
+        # exist_ok avoids filesystem race conditions between checking path existence and requesting creation
+        os.makedirs(dirname, exist_ok=True)
+
+        with open(self.logfile, "w", encoding="utf-8") as logfile:
+            suite_stop_time = timing.time()
+            suite_time_delta = suite_stop_time - self.suite_start_time
+
+            numtests = (
+                self.stats["passed"]
+                + self.stats["failure"]
+                + self.stats["skipped"]
+                + self.stats["error"]
+                - self.cnt_double_fail_tests
+            )
+            logfile.write('<?xml version="1.0" encoding="utf-8"?>')
+
+            suite_node = ET.Element(
+                "testsuite",
+                name=self.suite_name,
+                errors=str(self.stats["error"]),
+                failures=str(self.stats["failure"]),
+                skipped=str(self.stats["skipped"]),
+                tests=str(numtests),
+                time="%.3f" % suite_time_delta,
+                timestamp=datetime.fromtimestamp(self.suite_start_time).isoformat(),
+                hostname=platform.node(),
+            )
+            global_properties = self._get_global_properties_node()
+            if global_properties is not None:
+                suite_node.append(global_properties)
+            for node_reporter in self.node_reporters_ordered:
+                suite_node.append(node_reporter.to_xml())
+            testsuites = ET.Element("testsuites")
+            testsuites.append(suite_node)
+            logfile.write(ET.tostring(testsuites, encoding="unicode"))
+
+    def pytest_terminal_summary(self, terminalreporter: TerminalReporter) -> None:
+        terminalreporter.write_sep("-", f"generated xml file: {self.logfile}")
+
+    def add_global_property(self, name: str, value: object) -> None:
+        __tracebackhide__ = True
+        _check_record_param_type("name", name)
+        self.global_properties.append((name, bin_xml_escape(value)))
+
+    def _get_global_properties_node(self) -> Optional[ET.Element]:
+        """Return a Junit node containing custom properties, if any."""
+        if self.global_properties:
+            properties = ET.Element("properties")
+            for name, value in self.global_properties:
+                properties.append(ET.Element("property", name=name, value=value))
+            return properties
+        return None
diff --git a/contrib/python/pytest/py3/_pytest/legacypath.py b/contrib/python/pytest/py3/_pytest/legacypath.py
new file mode 100644
index 0000000000..af1d0c07e3
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/legacypath.py
@@ -0,0 +1,479 @@
+"""Add backward compatibility support for the legacy py path type."""
+import dataclasses
+import shlex
+import subprocess
+from pathlib import Path
+from typing import List
+from typing import Optional
+from typing import TYPE_CHECKING
+from typing import Union
+
+from iniconfig import SectionWrapper
+
+from _pytest.cacheprovider import Cache
+from _pytest.compat import final
+from _pytest.compat import LEGACY_PATH
+from _pytest.compat import legacy_path
+from _pytest.config import Config
+from _pytest.config import hookimpl
+from _pytest.config import PytestPluginManager
+from _pytest.deprecated import check_ispytest
+from _pytest.fixtures import fixture
+from _pytest.fixtures import FixtureRequest
+from _pytest.main import Session
+from _pytest.monkeypatch import MonkeyPatch
+from _pytest.nodes import Collector
+from _pytest.nodes import Item
+from _pytest.nodes import Node
+from _pytest.pytester import HookRecorder
+from _pytest.pytester import Pytester
+from _pytest.pytester import RunResult
+from _pytest.terminal import TerminalReporter
+from _pytest.tmpdir import TempPathFactory
+
+if TYPE_CHECKING:
+    from typing_extensions import Final
+
+    import pexpect
+
+
+@final
+class Testdir:
+    """
+    Similar to :class:`Pytester`, but this class works with legacy legacy_path objects instead.
+
+    All methods just forward to an internal :class:`Pytester` instance, converting results
+    to `legacy_path` objects as necessary.
+    """
+
+    __test__ = False
+
+    CLOSE_STDIN: "Final" = Pytester.CLOSE_STDIN
+    TimeoutExpired: "Final" = Pytester.TimeoutExpired
+
+    def __init__(self, pytester: Pytester, *, _ispytest: bool = False) -> None:
+        check_ispytest(_ispytest)
+        self._pytester = pytester
+
+    @property
+    def tmpdir(self) -> LEGACY_PATH:
+        """Temporary directory where tests are executed."""
+        return legacy_path(self._pytester.path)
+
+    @property
+    def test_tmproot(self) -> LEGACY_PATH:
+        return legacy_path(self._pytester._test_tmproot)
+
+    @property
+    def request(self):
+        return self._pytester._request
+
+    @property
+    def plugins(self):
+        return self._pytester.plugins
+
+    @plugins.setter
+    def plugins(self, plugins):
+        self._pytester.plugins = plugins
+
+    @property
+    def monkeypatch(self) -> MonkeyPatch:
+        return self._pytester._monkeypatch
+
+    def make_hook_recorder(self, pluginmanager) -> HookRecorder:
+        """See :meth:`Pytester.make_hook_recorder`."""
+        return self._pytester.make_hook_recorder(pluginmanager)
+
+    def chdir(self) -> None:
+        """See :meth:`Pytester.chdir`."""
+        return self._pytester.chdir()
+
+    def finalize(self) -> None:
+        """See :meth:`Pytester._finalize`."""
+        return self._pytester._finalize()
+
+    def makefile(self, ext, *args, **kwargs) -> LEGACY_PATH:
+        """See :meth:`Pytester.makefile`."""
+        if ext and not ext.startswith("."):
+            # pytester.makefile is going to throw a ValueError in a way that
+            # testdir.makefile did not, because
+            # pathlib.Path is stricter suffixes than py.path
+            # This ext arguments is likely user error, but since testdir has
+            # allowed this, we will prepend "." as a workaround to avoid breaking
+            # testdir usage that worked before
+            ext = "." + ext
+        return legacy_path(self._pytester.makefile(ext, *args, **kwargs))
+
+    def makeconftest(self, source) -> LEGACY_PATH:
+        """See :meth:`Pytester.makeconftest`."""
+        return legacy_path(self._pytester.makeconftest(source))
+
+    def makeini(self, source) -> LEGACY_PATH:
+        """See :meth:`Pytester.makeini`."""
+        return legacy_path(self._pytester.makeini(source))
+
+    def getinicfg(self, source: str) -> SectionWrapper:
+        """See :meth:`Pytester.getinicfg`."""
+        return self._pytester.getinicfg(source)
+
+    def makepyprojecttoml(self, source) -> LEGACY_PATH:
+        """See :meth:`Pytester.makepyprojecttoml`."""
+        return legacy_path(self._pytester.makepyprojecttoml(source))
+
+    def makepyfile(self, *args, **kwargs) -> LEGACY_PATH:
+        """See :meth:`Pytester.makepyfile`."""
+        return legacy_path(self._pytester.makepyfile(*args, **kwargs))
+
+    def maketxtfile(self, *args, **kwargs) -> LEGACY_PATH:
+        """See :meth:`Pytester.maketxtfile`."""
+        return legacy_path(self._pytester.maketxtfile(*args, **kwargs))
+
+    def syspathinsert(self, path=None) -> None:
+        """See :meth:`Pytester.syspathinsert`."""
+        return self._pytester.syspathinsert(path)
+
+    def mkdir(self, name) -> LEGACY_PATH:
+        """See :meth:`Pytester.mkdir`."""
+        return legacy_path(self._pytester.mkdir(name))
+
+    def mkpydir(self, name) -> LEGACY_PATH:
+        """See :meth:`Pytester.mkpydir`."""
+        return legacy_path(self._pytester.mkpydir(name))
+
+    def copy_example(self, name=None) -> LEGACY_PATH:
+        """See :meth:`Pytester.copy_example`."""
+        return legacy_path(self._pytester.copy_example(name))
+
+    def getnode(self, config: Config, arg) -> Optional[Union[Item, Collector]]:
+        """See :meth:`Pytester.getnode`."""
+        return self._pytester.getnode(config, arg)
+
+    def getpathnode(self, path):
+        """See :meth:`Pytester.getpathnode`."""
+        return self._pytester.getpathnode(path)
+
+    def genitems(self, colitems: List[Union[Item, Collector]]) -> List[Item]:
+        """See :meth:`Pytester.genitems`."""
+        return self._pytester.genitems(colitems)
+
+    def runitem(self, source):
+        """See :meth:`Pytester.runitem`."""
+        return self._pytester.runitem(source)
+
+    def inline_runsource(self, source, *cmdlineargs):
+        """See :meth:`Pytester.inline_runsource`."""
+        return self._pytester.inline_runsource(source, *cmdlineargs)
+
+    def inline_genitems(self, *args):
+        """See :meth:`Pytester.inline_genitems`."""
+        return self._pytester.inline_genitems(*args)
+
+    def inline_run(self, *args, plugins=(), no_reraise_ctrlc: bool = False):
+        """See :meth:`Pytester.inline_run`."""
+        return self._pytester.inline_run(
+            *args, plugins=plugins, no_reraise_ctrlc=no_reraise_ctrlc
+        )
+
+    def runpytest_inprocess(self, *args, **kwargs) -> RunResult:
+        """See :meth:`Pytester.runpytest_inprocess`."""
+        return self._pytester.runpytest_inprocess(*args, **kwargs)
+
+    def runpytest(self, *args, **kwargs) -> RunResult:
+        """See :meth:`Pytester.runpytest`."""
+        return self._pytester.runpytest(*args, **kwargs)
+
+    def parseconfig(self, *args) -> Config:
+        """See :meth:`Pytester.parseconfig`."""
+        return self._pytester.parseconfig(*args)
+
+    def parseconfigure(self, *args) -> Config:
+        """See :meth:`Pytester.parseconfigure`."""
+        return self._pytester.parseconfigure(*args)
+
+    def getitem(self, source, funcname="test_func"):
+        """See :meth:`Pytester.getitem`."""
+        return self._pytester.getitem(source, funcname)
+
+    def getitems(self, source):
+        """See :meth:`Pytester.getitems`."""
+        return self._pytester.getitems(source)
+
+    def getmodulecol(self, source, configargs=(), withinit=False):
+        """See :meth:`Pytester.getmodulecol`."""
+        return self._pytester.getmodulecol(
+            source, configargs=configargs, withinit=withinit
+        )
+
+    def collect_by_name(
+        self, modcol: Collector, name: str
+    ) -> Optional[Union[Item, Collector]]:
+        """See :meth:`Pytester.collect_by_name`."""
+        return self._pytester.collect_by_name(modcol, name)
+
+    def popen(
+        self,
+        cmdargs,
+        stdout=subprocess.PIPE,
+        stderr=subprocess.PIPE,
+        stdin=CLOSE_STDIN,
+        **kw,
+    ):
+        """See :meth:`Pytester.popen`."""
+        return self._pytester.popen(cmdargs, stdout, stderr, stdin, **kw)
+
+    def run(self, *cmdargs, timeout=None, stdin=CLOSE_STDIN) -> RunResult:
+        """See :meth:`Pytester.run`."""
+        return self._pytester.run(*cmdargs, timeout=timeout, stdin=stdin)
+
+    def runpython(self, script) -> RunResult:
+        """See :meth:`Pytester.runpython`."""
+        return self._pytester.runpython(script)
+
+    def runpython_c(self, command):
+        """See :meth:`Pytester.runpython_c`."""
+        return self._pytester.runpython_c(command)
+
+    def runpytest_subprocess(self, *args, timeout=None) -> RunResult:
+        """See :meth:`Pytester.runpytest_subprocess`."""
+        return self._pytester.runpytest_subprocess(*args, timeout=timeout)
+
+    def spawn_pytest(
+        self, string: str, expect_timeout: float = 10.0
+    ) -> "pexpect.spawn":
+        """See :meth:`Pytester.spawn_pytest`."""
+        return self._pytester.spawn_pytest(string, expect_timeout=expect_timeout)
+
+    def spawn(self, cmd: str, expect_timeout: float = 10.0) -> "pexpect.spawn":
+        """See :meth:`Pytester.spawn`."""
+        return self._pytester.spawn(cmd, expect_timeout=expect_timeout)
+
+    def __repr__(self) -> str:
+        return f"<Testdir {self.tmpdir!r}>"
+
+    def __str__(self) -> str:
+        return str(self.tmpdir)
+
+
+class LegacyTestdirPlugin:
+    @staticmethod
+    @fixture
+    def testdir(pytester: Pytester) -> Testdir:
+        """
+        Identical to :fixture:`pytester`, and provides an instance whose methods return
+        legacy ``LEGACY_PATH`` objects instead when applicable.
+
+        New code should avoid using :fixture:`testdir` in favor of :fixture:`pytester`.
+        """
+        return Testdir(pytester, _ispytest=True)
+
+
+@final
+@dataclasses.dataclass
+class TempdirFactory:
+    """Backward compatibility wrapper that implements :class:`py.path.local`
+    for :class:`TempPathFactory`.
+
+    .. note::
+        These days, it is preferred to use ``tmp_path_factory``.
+
+        :ref:`About the tmpdir and tmpdir_factory fixtures<tmpdir and tmpdir_factory>`.
+
+    """
+
+    _tmppath_factory: TempPathFactory
+
+    def __init__(
+        self, tmppath_factory: TempPathFactory, *, _ispytest: bool = False
+    ) -> None:
+        check_ispytest(_ispytest)
+        self._tmppath_factory = tmppath_factory
+
+    def mktemp(self, basename: str, numbered: bool = True) -> LEGACY_PATH:
+        """Same as :meth:`TempPathFactory.mktemp`, but returns a :class:`py.path.local` object."""
+        return legacy_path(self._tmppath_factory.mktemp(basename, numbered).resolve())
+
+    def getbasetemp(self) -> LEGACY_PATH:
+        """Same as :meth:`TempPathFactory.getbasetemp`, but returns a :class:`py.path.local` object."""
+        return legacy_path(self._tmppath_factory.getbasetemp().resolve())
+
+
+class LegacyTmpdirPlugin:
+    @staticmethod
+    @fixture(scope="session")
+    def tmpdir_factory(request: FixtureRequest) -> TempdirFactory:
+        """Return a :class:`pytest.TempdirFactory` instance for the test session."""
+        # Set dynamically by pytest_configure().
+        return request.config._tmpdirhandler  # type: ignore
+
+    @staticmethod
+    @fixture
+    def tmpdir(tmp_path: Path) -> LEGACY_PATH:
+        """Return a temporary directory path object which is unique to each test
+        function invocation, created as a sub directory of the base temporary
+        directory.
+
+        By default, a new base temporary directory is created each test session,
+        and old bases are removed after 3 sessions, to aid in debugging. If
+        ``--basetemp`` is used then it is cleared each session. See :ref:`base
+        temporary directory`.
+
+        The returned object is a `legacy_path`_ object.
+
+        .. note::
+            These days, it is preferred to use ``tmp_path``.
+
+            :ref:`About the tmpdir and tmpdir_factory fixtures<tmpdir and tmpdir_factory>`.
+
+        .. _legacy_path: https://py.readthedocs.io/en/latest/path.html
+        """
+        return legacy_path(tmp_path)
+
+
+def Cache_makedir(self: Cache, name: str) -> LEGACY_PATH:
+    """Return a directory path object with the given name.
+
+    Same as :func:`mkdir`, but returns a legacy py path instance.
+    """
+    return legacy_path(self.mkdir(name))
+
+
+def FixtureRequest_fspath(self: FixtureRequest) -> LEGACY_PATH:
+    """(deprecated) The file system path of the test module which collected this test."""
+    return legacy_path(self.path)
+
+
+def TerminalReporter_startdir(self: TerminalReporter) -> LEGACY_PATH:
+    """The directory from which pytest was invoked.
+
+    Prefer to use ``startpath`` which is a :class:`pathlib.Path`.
+
+    :type: LEGACY_PATH
+    """
+    return legacy_path(self.startpath)
+
+
+def Config_invocation_dir(self: Config) -> LEGACY_PATH:
+    """The directory from which pytest was invoked.
+
+    Prefer to use :attr:`invocation_params.dir <InvocationParams.dir>`,
+    which is a :class:`pathlib.Path`.
+
+    :type: LEGACY_PATH
+    """
+    return legacy_path(str(self.invocation_params.dir))
+
+
+def Config_rootdir(self: Config) -> LEGACY_PATH:
+    """The path to the :ref:`rootdir <rootdir>`.
+
+    Prefer to use :attr:`rootpath`, which is a :class:`pathlib.Path`.
+
+    :type: LEGACY_PATH
+    """
+    return legacy_path(str(self.rootpath))
+
+
+def Config_inifile(self: Config) -> Optional[LEGACY_PATH]:
+    """The path to the :ref:`configfile <configfiles>`.
+
+    Prefer to use :attr:`inipath`, which is a :class:`pathlib.Path`.
+
+    :type: Optional[LEGACY_PATH]
+    """
+    return legacy_path(str(self.inipath)) if self.inipath else None
+
+
+def Session_stardir(self: Session) -> LEGACY_PATH:
+    """The path from which pytest was invoked.
+
+    Prefer to use ``startpath`` which is a :class:`pathlib.Path`.
+
+    :type: LEGACY_PATH
+    """
+    return legacy_path(self.startpath)
+
+
+def Config__getini_unknown_type(
+    self, name: str, type: str, value: Union[str, List[str]]
+):
+    if type == "pathlist":
+        # TODO: This assert is probably not valid in all cases.
+        assert self.inipath is not None
+        dp = self.inipath.parent
+        input_values = shlex.split(value) if isinstance(value, str) else value
+        return [legacy_path(str(dp / x)) for x in input_values]
+    else:
+        raise ValueError(f"unknown configuration type: {type}", value)
+
+
+def Node_fspath(self: Node) -> LEGACY_PATH:
+    """(deprecated) returns a legacy_path copy of self.path"""
+    return legacy_path(self.path)
+
+
+def Node_fspath_set(self: Node, value: LEGACY_PATH) -> None:
+    self.path = Path(value)
+
+
+@hookimpl(tryfirst=True)
+def pytest_load_initial_conftests(early_config: Config) -> None:
+    """Monkeypatch legacy path attributes in several classes, as early as possible."""
+    mp = MonkeyPatch()
+    early_config.add_cleanup(mp.undo)
+
+    # Add Cache.makedir().
+    mp.setattr(Cache, "makedir", Cache_makedir, raising=False)
+
+    # Add FixtureRequest.fspath property.
+    mp.setattr(FixtureRequest, "fspath", property(FixtureRequest_fspath), raising=False)
+
+    # Add TerminalReporter.startdir property.
+    mp.setattr(
+        TerminalReporter, "startdir", property(TerminalReporter_startdir), raising=False
+    )
+
+    # Add Config.{invocation_dir,rootdir,inifile} properties.
+    mp.setattr(Config, "invocation_dir", property(Config_invocation_dir), raising=False)
+    mp.setattr(Config, "rootdir", property(Config_rootdir), raising=False)
+    mp.setattr(Config, "inifile", property(Config_inifile), raising=False)
+
+    # Add Session.startdir property.
+    mp.setattr(Session, "startdir", property(Session_stardir), raising=False)
+
+    # Add pathlist configuration type.
+    mp.setattr(Config, "_getini_unknown_type", Config__getini_unknown_type)
+
+    # Add Node.fspath property.
+    mp.setattr(Node, "fspath", property(Node_fspath, Node_fspath_set), raising=False)
+
+
+@hookimpl
+def pytest_configure(config: Config) -> None:
+    """Installs the LegacyTmpdirPlugin if the ``tmpdir`` plugin is also installed."""
+    if config.pluginmanager.has_plugin("tmpdir"):
+        mp = MonkeyPatch()
+        config.add_cleanup(mp.undo)
+        # Create TmpdirFactory and attach it to the config object.
+        #
+        # This is to comply with existing plugins which expect the handler to be
+        # available at pytest_configure time, but ideally should be moved entirely
+        # to the tmpdir_factory session fixture.
+        try:
+            tmp_path_factory = config._tmp_path_factory  # type: ignore[attr-defined]
+        except AttributeError:
+            # tmpdir plugin is blocked.
+            pass
+        else:
+            _tmpdirhandler = TempdirFactory(tmp_path_factory, _ispytest=True)
+            mp.setattr(config, "_tmpdirhandler", _tmpdirhandler, raising=False)
+
+        config.pluginmanager.register(LegacyTmpdirPlugin, "legacypath-tmpdir")
+
+
+@hookimpl
+def pytest_plugin_registered(plugin: object, manager: PytestPluginManager) -> None:
+    # pytester is not loaded by default and is commonly loaded from a conftest,
+    # so checking for it in `pytest_configure` is not enough.
+    is_pytester = plugin is manager.get_plugin("pytester")
+    if is_pytester and not manager.is_registered(LegacyTestdirPlugin):
+        manager.register(LegacyTestdirPlugin, "legacypath-pytester")
diff --git a/contrib/python/pytest/py3/_pytest/logging.py b/contrib/python/pytest/py3/_pytest/logging.py
new file mode 100644
index 0000000000..9f2f1c7935
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/logging.py
@@ -0,0 +1,920 @@
+"""Access and control log capturing."""
+import io
+import logging
+import os
+import re
+from contextlib import contextmanager
+from contextlib import nullcontext
+from datetime import datetime
+from datetime import timedelta
+from datetime import timezone
+from io import StringIO
+from logging import LogRecord
+from pathlib import Path
+from typing import AbstractSet
+from typing import Dict
+from typing import Generator
+from typing import List
+from typing import Mapping
+from typing import Optional
+from typing import Tuple
+from typing import TYPE_CHECKING
+from typing import TypeVar
+from typing import Union
+
+from _pytest import nodes
+from _pytest._io import TerminalWriter
+from _pytest.capture import CaptureManager
+from _pytest.compat import final
+from _pytest.config import _strtobool
+from _pytest.config import Config
+from _pytest.config import create_terminal_writer
+from _pytest.config import hookimpl
+from _pytest.config import UsageError
+from _pytest.config.argparsing import Parser
+from _pytest.deprecated import check_ispytest
+from _pytest.fixtures import fixture
+from _pytest.fixtures import FixtureRequest
+from _pytest.main import Session
+from _pytest.stash import StashKey
+from _pytest.terminal import TerminalReporter
+
+if TYPE_CHECKING:
+    logging_StreamHandler = logging.StreamHandler[StringIO]
+
+    from typing_extensions import Literal
+else:
+    logging_StreamHandler = logging.StreamHandler
+
+DEFAULT_LOG_FORMAT = "%(levelname)-8s %(name)s:%(filename)s:%(lineno)d %(message)s"
+DEFAULT_LOG_DATE_FORMAT = "%H:%M:%S"
+_ANSI_ESCAPE_SEQ = re.compile(r"\x1b\[[\d;]+m")
+caplog_handler_key = StashKey["LogCaptureHandler"]()
+caplog_records_key = StashKey[Dict[str, List[logging.LogRecord]]]()
+
+
+def _remove_ansi_escape_sequences(text: str) -> str:
+    return _ANSI_ESCAPE_SEQ.sub("", text)
+
+
+class DatetimeFormatter(logging.Formatter):
+    """A logging formatter which formats record with
+    :func:`datetime.datetime.strftime` formatter instead of
+    :func:`time.strftime` in case of microseconds in format string.
+    """
+
+    def formatTime(self, record: LogRecord, datefmt=None) -> str:
+        if datefmt and "%f" in datefmt:
+            ct = self.converter(record.created)
+            tz = timezone(timedelta(seconds=ct.tm_gmtoff), ct.tm_zone)
+            # Construct `datetime.datetime` object from `struct_time`
+            # and msecs information from `record`
+            dt = datetime(*ct[0:6], microsecond=round(record.msecs * 1000), tzinfo=tz)
+            return dt.strftime(datefmt)
+        # Use `logging.Formatter` for non-microsecond formats
+        return super().formatTime(record, datefmt)
+
+
+class ColoredLevelFormatter(DatetimeFormatter):
+    """A logging formatter which colorizes the %(levelname)..s part of the
+    log format passed to __init__."""
+
+    LOGLEVEL_COLOROPTS: Mapping[int, AbstractSet[str]] = {
+        logging.CRITICAL: {"red"},
+        logging.ERROR: {"red", "bold"},
+        logging.WARNING: {"yellow"},
+        logging.WARN: {"yellow"},
+        logging.INFO: {"green"},
+        logging.DEBUG: {"purple"},
+        logging.NOTSET: set(),
+    }
+    LEVELNAME_FMT_REGEX = re.compile(r"%\(levelname\)([+-.]?\d*(?:\.\d+)?s)")
+
+    def __init__(self, terminalwriter: TerminalWriter, *args, **kwargs) -> None:
+        super().__init__(*args, **kwargs)
+        self._terminalwriter = terminalwriter
+        self._original_fmt = self._style._fmt
+        self._level_to_fmt_mapping: Dict[int, str] = {}
+
+        for level, color_opts in self.LOGLEVEL_COLOROPTS.items():
+            self.add_color_level(level, *color_opts)
+
+    def add_color_level(self, level: int, *color_opts: str) -> None:
+        """Add or update color opts for a log level.
+
+        :param level:
+            Log level to apply a style to, e.g. ``logging.INFO``.
+        :param color_opts:
+            ANSI escape sequence color options. Capitalized colors indicates
+            background color, i.e. ``'green', 'Yellow', 'bold'`` will give bold
+            green text on yellow background.
+
+        .. warning::
+            This is an experimental API.
+        """
+
+        assert self._fmt is not None
+        levelname_fmt_match = self.LEVELNAME_FMT_REGEX.search(self._fmt)
+        if not levelname_fmt_match:
+            return
+        levelname_fmt = levelname_fmt_match.group()
+
+        formatted_levelname = levelname_fmt % {"levelname": logging.getLevelName(level)}
+
+        # add ANSI escape sequences around the formatted levelname
+        color_kwargs = {name: True for name in color_opts}
+        colorized_formatted_levelname = self._terminalwriter.markup(
+            formatted_levelname, **color_kwargs
+        )
+        self._level_to_fmt_mapping[level] = self.LEVELNAME_FMT_REGEX.sub(
+            colorized_formatted_levelname, self._fmt
+        )
+
+    def format(self, record: logging.LogRecord) -> str:
+        fmt = self._level_to_fmt_mapping.get(record.levelno, self._original_fmt)
+        self._style._fmt = fmt
+        return super().format(record)
+
+
+class PercentStyleMultiline(logging.PercentStyle):
+    """A logging style with special support for multiline messages.
+
+    If the message of a record consists of multiple lines, this style
+    formats the message as if each line were logged separately.
+    """
+
+    def __init__(self, fmt: str, auto_indent: Union[int, str, bool, None]) -> None:
+        super().__init__(fmt)
+        self._auto_indent = self._get_auto_indent(auto_indent)
+
+    @staticmethod
+    def _get_auto_indent(auto_indent_option: Union[int, str, bool, None]) -> int:
+        """Determine the current auto indentation setting.
+
+        Specify auto indent behavior (on/off/fixed) by passing in
+        extra={"auto_indent": [value]} to the call to logging.log() or
+        using a --log-auto-indent [value] command line or the
+        log_auto_indent [value] config option.
+
+        Default behavior is auto-indent off.
+
+        Using the string "True" or "on" or the boolean True as the value
+        turns auto indent on, using the string "False" or "off" or the
+        boolean False or the int 0 turns it off, and specifying a
+        positive integer fixes the indentation position to the value
+        specified.
+
+        Any other values for the option are invalid, and will silently be
+        converted to the default.
+
+        :param None|bool|int|str auto_indent_option:
+            User specified option for indentation from command line, config
+            or extra kwarg. Accepts int, bool or str. str option accepts the
+            same range of values as boolean config options, as well as
+            positive integers represented in str form.
+
+        :returns:
+            Indentation value, which can be
+            -1 (automatically determine indentation) or
+            0 (auto-indent turned off) or
+            >0 (explicitly set indentation position).
+        """
+
+        if auto_indent_option is None:
+            return 0
+        elif isinstance(auto_indent_option, bool):
+            if auto_indent_option:
+                return -1
+            else:
+                return 0
+        elif isinstance(auto_indent_option, int):
+            return int(auto_indent_option)
+        elif isinstance(auto_indent_option, str):
+            try:
+                return int(auto_indent_option)
+            except ValueError:
+                pass
+            try:
+                if _strtobool(auto_indent_option):
+                    return -1
+            except ValueError:
+                return 0
+
+        return 0
+
+    def format(self, record: logging.LogRecord) -> str:
+        if "\n" in record.message:
+            if hasattr(record, "auto_indent"):
+                # Passed in from the "extra={}" kwarg on the call to logging.log().
+                auto_indent = self._get_auto_indent(record.auto_indent)  # type: ignore[attr-defined]
+            else:
+                auto_indent = self._auto_indent
+
+            if auto_indent:
+                lines = record.message.splitlines()
+                formatted = self._fmt % {**record.__dict__, "message": lines[0]}
+
+                if auto_indent < 0:
+                    indentation = _remove_ansi_escape_sequences(formatted).find(
+                        lines[0]
+                    )
+                else:
+                    # Optimizes logging by allowing a fixed indentation.
+                    indentation = auto_indent
+                lines[0] = formatted
+                return ("\n" + " " * indentation).join(lines)
+        return self._fmt % record.__dict__
+
+
+def get_option_ini(config: Config, *names: str):
+    for name in names:
+        ret = config.getoption(name)  # 'default' arg won't work as expected
+        if ret is None:
+            ret = config.getini(name)
+        if ret:
+            return ret
+
+
+def pytest_addoption(parser: Parser) -> None:
+    """Add options to control log capturing."""
+    group = parser.getgroup("logging")
+
+    def add_option_ini(option, dest, default=None, type=None, **kwargs):
+        parser.addini(
+            dest, default=default, type=type, help="Default value for " + option
+        )
+        group.addoption(option, dest=dest, **kwargs)
+
+    add_option_ini(
+        "--log-level",
+        dest="log_level",
+        default=None,
+        metavar="LEVEL",
+        help=(
+            "Level of messages to catch/display."
+            " Not set by default, so it depends on the root/parent log handler's"
+            ' effective level, where it is "WARNING" by default.'
+        ),
+    )
+    add_option_ini(
+        "--log-format",
+        dest="log_format",
+        default=DEFAULT_LOG_FORMAT,
+        help="Log format used by the logging module",
+    )
+    add_option_ini(
+        "--log-date-format",
+        dest="log_date_format",
+        default=DEFAULT_LOG_DATE_FORMAT,
+        help="Log date format used by the logging module",
+    )
+    parser.addini(
+        "log_cli",
+        default=False,
+        type="bool",
+        help='Enable log display during test run (also known as "live logging")',
+    )
+    add_option_ini(
+        "--log-cli-level", dest="log_cli_level", default=None, help="CLI logging level"
+    )
+    add_option_ini(
+        "--log-cli-format",
+        dest="log_cli_format",
+        default=None,
+        help="Log format used by the logging module",
+    )
+    add_option_ini(
+        "--log-cli-date-format",
+        dest="log_cli_date_format",
+        default=None,
+        help="Log date format used by the logging module",
+    )
+    add_option_ini(
+        "--log-file",
+        dest="log_file",
+        default=None,
+        help="Path to a file when logging will be written to",
+    )
+    add_option_ini(
+        "--log-file-level",
+        dest="log_file_level",
+        default=None,
+        help="Log file logging level",
+    )
+    add_option_ini(
+        "--log-file-format",
+        dest="log_file_format",
+        default=DEFAULT_LOG_FORMAT,
+        help="Log format used by the logging module",
+    )
+    add_option_ini(
+        "--log-file-date-format",
+        dest="log_file_date_format",
+        default=DEFAULT_LOG_DATE_FORMAT,
+        help="Log date format used by the logging module",
+    )
+    add_option_ini(
+        "--log-auto-indent",
+        dest="log_auto_indent",
+        default=None,
+        help="Auto-indent multiline messages passed to the logging module. Accepts true|on, false|off or an integer.",
+    )
+    group.addoption(
+        "--log-disable",
+        action="append",
+        default=[],
+        dest="logger_disable",
+        help="Disable a logger by name. Can be passed multiple times.",
+    )
+
+
+_HandlerType = TypeVar("_HandlerType", bound=logging.Handler)
+
+
+# Not using @contextmanager for performance reasons.
+class catching_logs:
+    """Context manager that prepares the whole logging machinery properly."""
+
+    __slots__ = ("handler", "level", "orig_level")
+
+    def __init__(self, handler: _HandlerType, level: Optional[int] = None) -> None:
+        self.handler = handler
+        self.level = level
+
+    def __enter__(self):
+        root_logger = logging.getLogger()
+        if self.level is not None:
+            self.handler.setLevel(self.level)
+        root_logger.addHandler(self.handler)
+        if self.level is not None:
+            self.orig_level = root_logger.level
+            root_logger.setLevel(min(self.orig_level, self.level))
+        return self.handler
+
+    def __exit__(self, type, value, traceback):
+        root_logger = logging.getLogger()
+        if self.level is not None:
+            root_logger.setLevel(self.orig_level)
+        root_logger.removeHandler(self.handler)
+
+
+class LogCaptureHandler(logging_StreamHandler):
+    """A logging handler that stores log records and the log text."""
+
+    def __init__(self) -> None:
+        """Create a new log handler."""
+        super().__init__(StringIO())
+        self.records: List[logging.LogRecord] = []
+
+    def emit(self, record: logging.LogRecord) -> None:
+        """Keep the log records in a list in addition to the log text."""
+        self.records.append(record)
+        super().emit(record)
+
+    def reset(self) -> None:
+        self.records = []
+        self.stream = StringIO()
+
+    def clear(self) -> None:
+        self.records.clear()
+        self.stream = StringIO()
+
+    def handleError(self, record: logging.LogRecord) -> None:
+        if logging.raiseExceptions:
+            # Fail the test if the log message is bad (emit failed).
+            # The default behavior of logging is to print "Logging error"
+            # to stderr with the call stack and some extra details.
+            # pytest wants to make such mistakes visible during testing.
+            raise
+
+
+@final
+class LogCaptureFixture:
+    """Provides access and control of log capturing."""
+
+    def __init__(self, item: nodes.Node, *, _ispytest: bool = False) -> None:
+        check_ispytest(_ispytest)
+        self._item = item
+        self._initial_handler_level: Optional[int] = None
+        # Dict of log name -> log level.
+        self._initial_logger_levels: Dict[Optional[str], int] = {}
+        self._initial_disabled_logging_level: Optional[int] = None
+
+    def _finalize(self) -> None:
+        """Finalize the fixture.
+
+        This restores the log levels and the disabled logging levels changed by :meth:`set_level`.
+        """
+        # Restore log levels.
+        if self._initial_handler_level is not None:
+            self.handler.setLevel(self._initial_handler_level)
+        for logger_name, level in self._initial_logger_levels.items():
+            logger = logging.getLogger(logger_name)
+            logger.setLevel(level)
+        # Disable logging at the original disabled logging level.
+        if self._initial_disabled_logging_level is not None:
+            logging.disable(self._initial_disabled_logging_level)
+            self._initial_disabled_logging_level = None
+
+    @property
+    def handler(self) -> LogCaptureHandler:
+        """Get the logging handler used by the fixture."""
+        return self._item.stash[caplog_handler_key]
+
+    def get_records(
+        self, when: "Literal['setup', 'call', 'teardown']"
+    ) -> List[logging.LogRecord]:
+        """Get the logging records for one of the possible test phases.
+
+        :param when:
+            Which test phase to obtain the records from.
+            Valid values are: "setup", "call" and "teardown".
+
+        :returns: The list of captured records at the given stage.
+
+        .. versionadded:: 3.4
+        """
+        return self._item.stash[caplog_records_key].get(when, [])
+
+    @property
+    def text(self) -> str:
+        """The formatted log text."""
+        return _remove_ansi_escape_sequences(self.handler.stream.getvalue())
+
+    @property
+    def records(self) -> List[logging.LogRecord]:
+        """The list of log records."""
+        return self.handler.records
+
+    @property
+    def record_tuples(self) -> List[Tuple[str, int, str]]:
+        """A list of a stripped down version of log records intended
+        for use in assertion comparison.
+
+        The format of the tuple is:
+
+            (logger_name, log_level, message)
+        """
+        return [(r.name, r.levelno, r.getMessage()) for r in self.records]
+
+    @property
+    def messages(self) -> List[str]:
+        """A list of format-interpolated log messages.
+
+        Unlike 'records', which contains the format string and parameters for
+        interpolation, log messages in this list are all interpolated.
+
+        Unlike 'text', which contains the output from the handler, log
+        messages in this list are unadorned with levels, timestamps, etc,
+        making exact comparisons more reliable.
+
+        Note that traceback or stack info (from :func:`logging.exception` or
+        the `exc_info` or `stack_info` arguments to the logging functions) is
+        not included, as this is added by the formatter in the handler.
+
+        .. versionadded:: 3.7
+        """
+        return [r.getMessage() for r in self.records]
+
+    def clear(self) -> None:
+        """Reset the list of log records and the captured log text."""
+        self.handler.clear()
+
+    def _force_enable_logging(
+        self, level: Union[int, str], logger_obj: logging.Logger
+    ) -> int:
+        """Enable the desired logging level if the global level was disabled via ``logging.disabled``.
+
+        Only enables logging levels greater than or equal to the requested ``level``.
+
+        Does nothing if the desired ``level`` wasn't disabled.
+
+        :param level:
+            The logger level caplog should capture.
+            All logging is enabled if a non-standard logging level string is supplied.
+            Valid level strings are in :data:`logging._nameToLevel`.
+        :param logger_obj: The logger object to check.
+
+        :return: The original disabled logging level.
+        """
+        original_disable_level: int = logger_obj.manager.disable  # type: ignore[attr-defined]
+
+        if isinstance(level, str):
+            # Try to translate the level string to an int for `logging.disable()`
+            level = logging.getLevelName(level)
+
+        if not isinstance(level, int):
+            # The level provided was not valid, so just un-disable all logging.
+            logging.disable(logging.NOTSET)
+        elif not logger_obj.isEnabledFor(level):
+            # Each level is `10` away from other levels.
+            # https://docs.python.org/3/library/logging.html#logging-levels
+            disable_level = max(level - 10, logging.NOTSET)
+            logging.disable(disable_level)
+
+        return original_disable_level
+
+    def set_level(self, level: Union[int, str], logger: Optional[str] = None) -> None:
+        """Set the threshold level of a logger for the duration of a test.
+
+        Logging messages which are less severe than this level will not be captured.
+
+        .. versionchanged:: 3.4
+            The levels of the loggers changed by this function will be
+            restored to their initial values at the end of the test.
+
+        Will enable the requested logging level if it was disabled via :meth:`logging.disable`.
+
+        :param level: The level.
+        :param logger: The logger to update. If not given, the root logger.
+        """
+        logger_obj = logging.getLogger(logger)
+        # Save the original log-level to restore it during teardown.
+        self._initial_logger_levels.setdefault(logger, logger_obj.level)
+        logger_obj.setLevel(level)
+        if self._initial_handler_level is None:
+            self._initial_handler_level = self.handler.level
+        self.handler.setLevel(level)
+        initial_disabled_logging_level = self._force_enable_logging(level, logger_obj)
+        if self._initial_disabled_logging_level is None:
+            self._initial_disabled_logging_level = initial_disabled_logging_level
+
+    @contextmanager
+    def at_level(
+        self, level: Union[int, str], logger: Optional[str] = None
+    ) -> Generator[None, None, None]:
+        """Context manager that sets the level for capturing of logs. After
+        the end of the 'with' statement the level is restored to its original
+        value.
+
+        Will enable the requested logging level if it was disabled via :meth:`logging.disable`.
+
+        :param level: The level.
+        :param logger: The logger to update. If not given, the root logger.
+        """
+        logger_obj = logging.getLogger(logger)
+        orig_level = logger_obj.level
+        logger_obj.setLevel(level)
+        handler_orig_level = self.handler.level
+        self.handler.setLevel(level)
+        original_disable_level = self._force_enable_logging(level, logger_obj)
+        try:
+            yield
+        finally:
+            logger_obj.setLevel(orig_level)
+            self.handler.setLevel(handler_orig_level)
+            logging.disable(original_disable_level)
+
+
+@fixture
+def caplog(request: FixtureRequest) -> Generator[LogCaptureFixture, None, None]:
+    """Access and control log capturing.
+
+    Captured logs are available through the following properties/methods::
+
+    * caplog.messages        -> list of format-interpolated log messages
+    * caplog.text            -> string containing formatted log output
+    * caplog.records         -> list of logging.LogRecord instances
+    * caplog.record_tuples   -> list of (logger_name, level, message) tuples
+    * caplog.clear()         -> clear captured records and formatted log output string
+    """
+    result = LogCaptureFixture(request.node, _ispytest=True)
+    yield result
+    result._finalize()
+
+
+def get_log_level_for_setting(config: Config, *setting_names: str) -> Optional[int]:
+    for setting_name in setting_names:
+        log_level = config.getoption(setting_name)
+        if log_level is None:
+            log_level = config.getini(setting_name)
+        if log_level:
+            break
+    else:
+        return None
+
+    if isinstance(log_level, str):
+        log_level = log_level.upper()
+    try:
+        return int(getattr(logging, log_level, log_level))
+    except ValueError as e:
+        # Python logging does not recognise this as a logging level
+        raise UsageError(
+            "'{}' is not recognized as a logging level name for "
+            "'{}'. Please consider passing the "
+            "logging level num instead.".format(log_level, setting_name)
+        ) from e
+
+
+# run after terminalreporter/capturemanager are configured
+@hookimpl(trylast=True)
+def pytest_configure(config: Config) -> None:
+    config.pluginmanager.register(LoggingPlugin(config), "logging-plugin")
+
+
+class LoggingPlugin:
+    """Attaches to the logging module and captures log messages for each test."""
+
+    def __init__(self, config: Config) -> None:
+        """Create a new plugin to capture log messages.
+
+        The formatter can be safely shared across all handlers so
+        create a single one for the entire test session here.
+        """
+        self._config = config
+
+        # Report logging.
+        self.formatter = self._create_formatter(
+            get_option_ini(config, "log_format"),
+            get_option_ini(config, "log_date_format"),
+            get_option_ini(config, "log_auto_indent"),
+        )
+        self.log_level = get_log_level_for_setting(config, "log_level")
+        self.caplog_handler = LogCaptureHandler()
+        self.caplog_handler.setFormatter(self.formatter)
+        self.report_handler = LogCaptureHandler()
+        self.report_handler.setFormatter(self.formatter)
+
+        # File logging.
+        self.log_file_level = get_log_level_for_setting(config, "log_file_level")
+        log_file = get_option_ini(config, "log_file") or os.devnull
+        if log_file != os.devnull:
+            directory = os.path.dirname(os.path.abspath(log_file))
+            if not os.path.isdir(directory):
+                os.makedirs(directory)
+
+        self.log_file_handler = _FileHandler(log_file, mode="w", encoding="UTF-8")
+        log_file_format = get_option_ini(config, "log_file_format", "log_format")
+        log_file_date_format = get_option_ini(
+            config, "log_file_date_format", "log_date_format"
+        )
+
+        log_file_formatter = DatetimeFormatter(
+            log_file_format, datefmt=log_file_date_format
+        )
+        self.log_file_handler.setFormatter(log_file_formatter)
+
+        # CLI/live logging.
+        self.log_cli_level = get_log_level_for_setting(
+            config, "log_cli_level", "log_level"
+        )
+        if self._log_cli_enabled():
+            terminal_reporter = config.pluginmanager.get_plugin("terminalreporter")
+            # Guaranteed by `_log_cli_enabled()`.
+            assert terminal_reporter is not None
+            capture_manager = config.pluginmanager.get_plugin("capturemanager")
+            # if capturemanager plugin is disabled, live logging still works.
+            self.log_cli_handler: Union[
+                _LiveLoggingStreamHandler, _LiveLoggingNullHandler
+            ] = _LiveLoggingStreamHandler(terminal_reporter, capture_manager)
+        else:
+            self.log_cli_handler = _LiveLoggingNullHandler()
+        log_cli_formatter = self._create_formatter(
+            get_option_ini(config, "log_cli_format", "log_format"),
+            get_option_ini(config, "log_cli_date_format", "log_date_format"),
+            get_option_ini(config, "log_auto_indent"),
+        )
+        self.log_cli_handler.setFormatter(log_cli_formatter)
+        self._disable_loggers(loggers_to_disable=config.option.logger_disable)
+
+    def _disable_loggers(self, loggers_to_disable: List[str]) -> None:
+        if not loggers_to_disable:
+            return
+
+        for name in loggers_to_disable:
+            logger = logging.getLogger(name)
+            logger.disabled = True
+
+    def _create_formatter(self, log_format, log_date_format, auto_indent):
+        # Color option doesn't exist if terminal plugin is disabled.
+        color = getattr(self._config.option, "color", "no")
+        if color != "no" and ColoredLevelFormatter.LEVELNAME_FMT_REGEX.search(
+            log_format
+        ):
+            formatter: logging.Formatter = ColoredLevelFormatter(
+                create_terminal_writer(self._config), log_format, log_date_format
+            )
+        else:
+            formatter = DatetimeFormatter(log_format, log_date_format)
+
+        formatter._style = PercentStyleMultiline(
+            formatter._style._fmt, auto_indent=auto_indent
+        )
+
+        return formatter
+
+    def set_log_path(self, fname: str) -> None:
+        """Set the filename parameter for Logging.FileHandler().
+
+        Creates parent directory if it does not exist.
+
+        .. warning::
+            This is an experimental API.
+        """
+        fpath = Path(fname)
+
+        if not fpath.is_absolute():
+            fpath = self._config.rootpath / fpath
+
+        if not fpath.parent.exists():
+            fpath.parent.mkdir(exist_ok=True, parents=True)
+
+        # https://github.com/python/mypy/issues/11193
+        stream: io.TextIOWrapper = fpath.open(mode="w", encoding="UTF-8")  # type: ignore[assignment]
+        old_stream = self.log_file_handler.setStream(stream)
+        if old_stream:
+            old_stream.close()
+
+    def _log_cli_enabled(self):
+        """Return whether live logging is enabled."""
+        enabled = self._config.getoption(
+            "--log-cli-level"
+        ) is not None or self._config.getini("log_cli")
+        if not enabled:
+            return False
+
+        terminal_reporter = self._config.pluginmanager.get_plugin("terminalreporter")
+        if terminal_reporter is None:
+            # terminal reporter is disabled e.g. by pytest-xdist.
+            return False
+
+        return True
+
+    @hookimpl(hookwrapper=True, tryfirst=True)
+    def pytest_sessionstart(self) -> Generator[None, None, None]:
+        self.log_cli_handler.set_when("sessionstart")
+
+        with catching_logs(self.log_cli_handler, level=self.log_cli_level):
+            with catching_logs(self.log_file_handler, level=self.log_file_level):
+                yield
+
+    @hookimpl(hookwrapper=True, tryfirst=True)
+    def pytest_collection(self) -> Generator[None, None, None]:
+        self.log_cli_handler.set_when("collection")
+
+        with catching_logs(self.log_cli_handler, level=self.log_cli_level):
+            with catching_logs(self.log_file_handler, level=self.log_file_level):
+                yield
+
+    @hookimpl(hookwrapper=True)
+    def pytest_runtestloop(self, session: Session) -> Generator[None, None, None]:
+        if session.config.option.collectonly:
+            yield
+            return
+
+        if self._log_cli_enabled() and self._config.getoption("verbose") < 1:
+            # The verbose flag is needed to avoid messy test progress output.
+            self._config.option.verbose = 1
+
+        with catching_logs(self.log_cli_handler, level=self.log_cli_level):
+            with catching_logs(self.log_file_handler, level=self.log_file_level):
+                yield  # Run all the tests.
+
+    @hookimpl
+    def pytest_runtest_logstart(self) -> None:
+        self.log_cli_handler.reset()
+        self.log_cli_handler.set_when("start")
+
+    @hookimpl
+    def pytest_runtest_logreport(self) -> None:
+        self.log_cli_handler.set_when("logreport")
+
+    def _runtest_for(self, item: nodes.Item, when: str) -> Generator[None, None, None]:
+        """Implement the internals of the pytest_runtest_xxx() hooks."""
+        with catching_logs(
+            self.caplog_handler,
+            level=self.log_level,
+        ) as caplog_handler, catching_logs(
+            self.report_handler,
+            level=self.log_level,
+        ) as report_handler:
+            caplog_handler.reset()
+            report_handler.reset()
+            item.stash[caplog_records_key][when] = caplog_handler.records
+            item.stash[caplog_handler_key] = caplog_handler
+
+            yield
+
+            log = report_handler.stream.getvalue().strip()
+            item.add_report_section(when, "log", log)
+
+    @hookimpl(hookwrapper=True)
+    def pytest_runtest_setup(self, item: nodes.Item) -> Generator[None, None, None]:
+        self.log_cli_handler.set_when("setup")
+
+        empty: Dict[str, List[logging.LogRecord]] = {}
+        item.stash[caplog_records_key] = empty
+        yield from self._runtest_for(item, "setup")
+
+    @hookimpl(hookwrapper=True)
+    def pytest_runtest_call(self, item: nodes.Item) -> Generator[None, None, None]:
+        self.log_cli_handler.set_when("call")
+
+        yield from self._runtest_for(item, "call")
+
+    @hookimpl(hookwrapper=True)
+    def pytest_runtest_teardown(self, item: nodes.Item) -> Generator[None, None, None]:
+        self.log_cli_handler.set_when("teardown")
+
+        yield from self._runtest_for(item, "teardown")
+        del item.stash[caplog_records_key]
+        del item.stash[caplog_handler_key]
+
+    @hookimpl
+    def pytest_runtest_logfinish(self) -> None:
+        self.log_cli_handler.set_when("finish")
+
+    @hookimpl(hookwrapper=True, tryfirst=True)
+    def pytest_sessionfinish(self) -> Generator[None, None, None]:
+        self.log_cli_handler.set_when("sessionfinish")
+
+        with catching_logs(self.log_cli_handler, level=self.log_cli_level):
+            with catching_logs(self.log_file_handler, level=self.log_file_level):
+                yield
+
+    @hookimpl
+    def pytest_unconfigure(self) -> None:
+        # Close the FileHandler explicitly.
+        # (logging.shutdown might have lost the weakref?!)
+        self.log_file_handler.close()
+
+
+class _FileHandler(logging.FileHandler):
+    """A logging FileHandler with pytest tweaks."""
+
+    def handleError(self, record: logging.LogRecord) -> None:
+        # Handled by LogCaptureHandler.
+        pass
+
+
+class _LiveLoggingStreamHandler(logging_StreamHandler):
+    """A logging StreamHandler used by the live logging feature: it will
+    write a newline before the first log message in each test.
+
+    During live logging we must also explicitly disable stdout/stderr
+    capturing otherwise it will get captured and won't appear in the
+    terminal.
+    """
+
+    # Officially stream needs to be a IO[str], but TerminalReporter
+    # isn't. So force it.
+    stream: TerminalReporter = None  # type: ignore
+
+    def __init__(
+        self,
+        terminal_reporter: TerminalReporter,
+        capture_manager: Optional[CaptureManager],
+    ) -> None:
+        super().__init__(stream=terminal_reporter)  # type: ignore[arg-type]
+        self.capture_manager = capture_manager
+        self.reset()
+        self.set_when(None)
+        self._test_outcome_written = False
+
+    def reset(self) -> None:
+        """Reset the handler; should be called before the start of each test."""
+        self._first_record_emitted = False
+
+    def set_when(self, when: Optional[str]) -> None:
+        """Prepare for the given test phase (setup/call/teardown)."""
+        self._when = when
+        self._section_name_shown = False
+        if when == "start":
+            self._test_outcome_written = False
+
+    def emit(self, record: logging.LogRecord) -> None:
+        ctx_manager = (
+            self.capture_manager.global_and_fixture_disabled()
+            if self.capture_manager
+            else nullcontext()
+        )
+        with ctx_manager:
+            if not self._first_record_emitted:
+                self.stream.write("\n")
+                self._first_record_emitted = True
+            elif self._when in ("teardown", "finish"):
+                if not self._test_outcome_written:
+                    self._test_outcome_written = True
+                    self.stream.write("\n")
+            if not self._section_name_shown and self._when:
+                self.stream.section("live log " + self._when, sep="-", bold=True)
+                self._section_name_shown = True
+            super().emit(record)
+
+    def handleError(self, record: logging.LogRecord) -> None:
+        # Handled by LogCaptureHandler.
+        pass
+
+
+class _LiveLoggingNullHandler(logging.NullHandler):
+    """A logging handler used when live logging is disabled."""
+
+    def reset(self) -> None:
+        pass
+
+    def set_when(self, when: str) -> None:
+        pass
+
+    def handleError(self, record: logging.LogRecord) -> None:
+        # Handled by LogCaptureHandler.
+        pass
diff --git a/contrib/python/pytest/py3/_pytest/main.py b/contrib/python/pytest/py3/_pytest/main.py
new file mode 100644
index 0000000000..ea89a63fa1
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/main.py
@@ -0,0 +1,913 @@
+"""Core implementation of the testing process: init, session, runtest loop."""
+import argparse
+import dataclasses
+import fnmatch
+import functools
+import importlib
+import os
+import sys
+from pathlib import Path
+from typing import Callable
+from typing import Dict
+from typing import FrozenSet
+from typing import Iterator
+from typing import List
+from typing import Optional
+from typing import Sequence
+from typing import Set
+from typing import Tuple
+from typing import Type
+from typing import TYPE_CHECKING
+from typing import Union
+
+import _pytest._code
+from _pytest import nodes
+from _pytest.compat import final
+from _pytest.compat import overload
+from _pytest.config import Config
+from _pytest.config import directory_arg
+from _pytest.config import ExitCode
+from _pytest.config import hookimpl
+from _pytest.config import PytestPluginManager
+from _pytest.config import UsageError
+from _pytest.config.argparsing import Parser
+from _pytest.fixtures import FixtureManager
+from _pytest.outcomes import exit
+from _pytest.pathlib import absolutepath
+from _pytest.pathlib import bestrelpath
+from _pytest.pathlib import fnmatch_ex
+from _pytest.pathlib import safe_exists
+from _pytest.pathlib import visit
+from _pytest.reports import CollectReport
+from _pytest.reports import TestReport
+from _pytest.runner import collect_one_node
+from _pytest.runner import SetupState
+
+
+if TYPE_CHECKING:
+    from typing_extensions import Literal
+
+
+def pytest_addoption(parser: Parser) -> None:
+    parser.addini(
+        "norecursedirs",
+        "Directory patterns to avoid for recursion",
+        type="args",
+        default=[
+            "*.egg",
+            ".*",
+            "_darcs",
+            "build",
+            "CVS",
+            "dist",
+            "node_modules",
+            "venv",
+            "{arch}",
+        ],
+    )
+    parser.addini(
+        "testpaths",
+        "Directories to search for tests when no files or directories are given on the "
+        "command line",
+        type="args",
+        default=[],
+    )
+    group = parser.getgroup("general", "Running and selection options")
+    group._addoption(
+        "-x",
+        "--exitfirst",
+        action="store_const",
+        dest="maxfail",
+        const=1,
+        help="Exit instantly on first error or failed test",
+    )
+    group = parser.getgroup("pytest-warnings")
+    group.addoption(
+        "-W",
+        "--pythonwarnings",
+        action="append",
+        help="Set which warnings to report, see -W option of Python itself",
+    )
+    parser.addini(
+        "filterwarnings",
+        type="linelist",
+        help="Each line specifies a pattern for "
+        "warnings.filterwarnings. "
+        "Processed after -W/--pythonwarnings.",
+    )
+    group._addoption(
+        "--maxfail",
+        metavar="num",
+        action="store",
+        type=int,
+        dest="maxfail",
+        default=0,
+        help="Exit after first num failures or errors",
+    )
+    group._addoption(
+        "--strict-config",
+        action="store_true",
+        help="Any warnings encountered while parsing the `pytest` section of the "
+        "configuration file raise errors",
+    )
+    group._addoption(
+        "--strict-markers",
+        action="store_true",
+        help="Markers not registered in the `markers` section of the configuration "
+        "file raise errors",
+    )
+    group._addoption(
+        "--strict",
+        action="store_true",
+        help="(Deprecated) alias to --strict-markers",
+    )
+    group._addoption(
+        "-c",
+        "--config-file",
+        metavar="FILE",
+        type=str,
+        dest="inifilename",
+        help="Load configuration from `FILE` instead of trying to locate one of the "
+        "implicit configuration files.",
+    )
+    group._addoption(
+        "--continue-on-collection-errors",
+        action="store_true",
+        default=False,
+        dest="continue_on_collection_errors",
+        help="Force test execution even if collection errors occur",
+    )
+    group._addoption(
+        "--rootdir",
+        action="store",
+        dest="rootdir",
+        help="Define root directory for tests. Can be relative path: 'root_dir', './root_dir', "
+        "'root_dir/another_dir/'; absolute path: '/home/user/root_dir'; path with variables: "
+        "'$HOME/root_dir'.",
+    )
+
+    group = parser.getgroup("collect", "collection")
+    group.addoption(
+        "--collectonly",
+        "--collect-only",
+        "--co",
+        action="store_true",
+        help="Only collect tests, don't execute them",
+    )
+    group.addoption(
+        "--pyargs",
+        action="store_true",
+        help="Try to interpret all arguments as Python packages",
+    )
+    group.addoption(
+        "--ignore",
+        action="append",
+        metavar="path",
+        help="Ignore path during collection (multi-allowed)",
+    )
+    group.addoption(
+        "--ignore-glob",
+        action="append",
+        metavar="path",
+        help="Ignore path pattern during collection (multi-allowed)",
+    )
+    group.addoption(
+        "--deselect",
+        action="append",
+        metavar="nodeid_prefix",
+        help="Deselect item (via node id prefix) during collection (multi-allowed)",
+    )
+    group.addoption(
+        "--confcutdir",
+        dest="confcutdir",
+        default=None,
+        metavar="dir",
+        type=functools.partial(directory_arg, optname="--confcutdir"),
+        help="Only load conftest.py's relative to specified dir",
+    )
+    group.addoption(
+        "--noconftest",
+        action="store_true",
+        dest="noconftest",
+        default=False,
+        help="Don't load any conftest.py files",
+    )
+    group.addoption(
+        "--keepduplicates",
+        "--keep-duplicates",
+        action="store_true",
+        dest="keepduplicates",
+        default=False,
+        help="Keep duplicate tests",
+    )
+    group.addoption(
+        "--collect-in-virtualenv",
+        action="store_true",
+        dest="collect_in_virtualenv",
+        default=False,
+        help="Don't ignore tests in a local virtualenv directory",
+    )
+    group.addoption(
+        "--import-mode",
+        default="prepend",
+        choices=["prepend", "append", "importlib"],
+        dest="importmode",
+        help="Prepend/append to sys.path when importing test modules and conftest "
+        "files. Default: prepend.",
+    )
+
+    group = parser.getgroup("debugconfig", "test session debugging and configuration")
+    group.addoption(
+        "--basetemp",
+        dest="basetemp",
+        default=None,
+        type=validate_basetemp,
+        metavar="dir",
+        help=(
+            "Base temporary directory for this test run. "
+            "(Warning: this directory is removed if it exists.)"
+        ),
+    )
+
+
+def validate_basetemp(path: str) -> str:
+    # GH 7119
+    msg = "basetemp must not be empty, the current working directory or any parent directory of it"
+
+    # empty path
+    if not path:
+        raise argparse.ArgumentTypeError(msg)
+
+    def is_ancestor(base: Path, query: Path) -> bool:
+        """Return whether query is an ancestor of base."""
+        if base == query:
+            return True
+        return query in base.parents
+
+    # check if path is an ancestor of cwd
+    if is_ancestor(Path.cwd(), Path(path).absolute()):
+        raise argparse.ArgumentTypeError(msg)
+
+    # check symlinks for ancestors
+    if is_ancestor(Path.cwd().resolve(), Path(path).resolve()):
+        raise argparse.ArgumentTypeError(msg)
+
+    return path
+
+
+def wrap_session(
+    config: Config, doit: Callable[[Config, "Session"], Optional[Union[int, ExitCode]]]
+) -> Union[int, ExitCode]:
+    """Skeleton command line program."""
+    session = Session.from_config(config)
+    session.exitstatus = ExitCode.OK
+    initstate = 0
+    try:
+        try:
+            config._do_configure()
+            initstate = 1
+            config.hook.pytest_sessionstart(session=session)
+            initstate = 2
+            session.exitstatus = doit(config, session) or 0
+        except UsageError:
+            session.exitstatus = ExitCode.USAGE_ERROR
+            raise
+        except Failed:
+            session.exitstatus = ExitCode.TESTS_FAILED
+        except (KeyboardInterrupt, exit.Exception):
+            excinfo = _pytest._code.ExceptionInfo.from_current()
+            exitstatus: Union[int, ExitCode] = ExitCode.INTERRUPTED
+            if isinstance(excinfo.value, exit.Exception):
+                if excinfo.value.returncode is not None:
+                    exitstatus = excinfo.value.returncode
+                if initstate < 2:
+                    sys.stderr.write(f"{excinfo.typename}: {excinfo.value.msg}\n")
+            config.hook.pytest_keyboard_interrupt(excinfo=excinfo)
+            session.exitstatus = exitstatus
+        except BaseException:
+            session.exitstatus = ExitCode.INTERNAL_ERROR
+            excinfo = _pytest._code.ExceptionInfo.from_current()
+            try:
+                config.notify_exception(excinfo, config.option)
+            except exit.Exception as exc:
+                if exc.returncode is not None:
+                    session.exitstatus = exc.returncode
+                sys.stderr.write(f"{type(exc).__name__}: {exc}\n")
+            else:
+                if isinstance(excinfo.value, SystemExit):
+                    sys.stderr.write("mainloop: caught unexpected SystemExit!\n")
+
+    finally:
+        # Explicitly break reference cycle.
+        excinfo = None  # type: ignore
+        os.chdir(session.startpath)
+        if initstate >= 2:
+            try:
+                config.hook.pytest_sessionfinish(
+                    session=session, exitstatus=session.exitstatus
+                )
+            except exit.Exception as exc:
+                if exc.returncode is not None:
+                    session.exitstatus = exc.returncode
+                sys.stderr.write(f"{type(exc).__name__}: {exc}\n")
+        config._ensure_unconfigure()
+    return session.exitstatus
+
+
+def pytest_cmdline_main(config: Config) -> Union[int, ExitCode]:
+    return wrap_session(config, _main)
+
+
+def _main(config: Config, session: "Session") -> Optional[Union[int, ExitCode]]:
+    """Default command line protocol for initialization, session,
+    running tests and reporting."""
+    config.hook.pytest_collection(session=session)
+    config.hook.pytest_runtestloop(session=session)
+
+    if session.testsfailed:
+        return ExitCode.TESTS_FAILED
+    elif session.testscollected == 0:
+        return ExitCode.NO_TESTS_COLLECTED
+    return None
+
+
+def pytest_collection(session: "Session") -> None:
+    session.perform_collect()
+
+
+def pytest_runtestloop(session: "Session") -> bool:
+    if session.testsfailed and not session.config.option.continue_on_collection_errors:
+        raise session.Interrupted(
+            "%d error%s during collection"
+            % (session.testsfailed, "s" if session.testsfailed != 1 else "")
+        )
+
+    if session.config.option.collectonly:
+        return True
+
+    for i, item in enumerate(session.items):
+        nextitem = session.items[i + 1] if i + 1 < len(session.items) else None
+        item.config.hook.pytest_runtest_protocol(item=item, nextitem=nextitem)
+        if session.shouldfail:
+            raise session.Failed(session.shouldfail)
+        if session.shouldstop:
+            raise session.Interrupted(session.shouldstop)
+    return True
+
+
+def _in_venv(path: Path) -> bool:
+    """Attempt to detect if ``path`` is the root of a Virtual Environment by
+    checking for the existence of the appropriate activate script."""
+    bindir = path.joinpath("Scripts" if sys.platform.startswith("win") else "bin")
+    try:
+        if not bindir.is_dir():
+            return False
+    except OSError:
+        return False
+    activates = (
+        "activate",
+        "activate.csh",
+        "activate.fish",
+        "Activate",
+        "Activate.bat",
+        "Activate.ps1",
+    )
+    return any(fname.name in activates for fname in bindir.iterdir())
+
+
+def pytest_ignore_collect(collection_path: Path, config: Config) -> Optional[bool]:
+    ignore_paths = config._getconftest_pathlist(
+        "collect_ignore", path=collection_path.parent, rootpath=config.rootpath
+    )
+    ignore_paths = ignore_paths or []
+    excludeopt = config.getoption("ignore")
+    if excludeopt:
+        ignore_paths.extend(absolutepath(x) for x in excludeopt)
+
+    if collection_path in ignore_paths:
+        return True
+
+    ignore_globs = config._getconftest_pathlist(
+        "collect_ignore_glob", path=collection_path.parent, rootpath=config.rootpath
+    )
+    ignore_globs = ignore_globs or []
+    excludeglobopt = config.getoption("ignore_glob")
+    if excludeglobopt:
+        ignore_globs.extend(absolutepath(x) for x in excludeglobopt)
+
+    if any(fnmatch.fnmatch(str(collection_path), str(glob)) for glob in ignore_globs):
+        return True
+
+    allow_in_venv = config.getoption("collect_in_virtualenv")
+    if not allow_in_venv and _in_venv(collection_path):
+        return True
+
+    if collection_path.is_dir():
+        norecursepatterns = config.getini("norecursedirs")
+        if any(fnmatch_ex(pat, collection_path) for pat in norecursepatterns):
+            return True
+
+    return None
+
+
+def pytest_collection_modifyitems(items: List[nodes.Item], config: Config) -> None:
+    deselect_prefixes = tuple(config.getoption("deselect") or [])
+    if not deselect_prefixes:
+        return
+
+    remaining = []
+    deselected = []
+    for colitem in items:
+        if colitem.nodeid.startswith(deselect_prefixes):
+            deselected.append(colitem)
+        else:
+            remaining.append(colitem)
+
+    if deselected:
+        config.hook.pytest_deselected(items=deselected)
+        items[:] = remaining
+
+
+class FSHookProxy:
+    def __init__(self, pm: PytestPluginManager, remove_mods) -> None:
+        self.pm = pm
+        self.remove_mods = remove_mods
+
+    def __getattr__(self, name: str):
+        x = self.pm.subset_hook_caller(name, remove_plugins=self.remove_mods)
+        self.__dict__[name] = x
+        return x
+
+
+class Interrupted(KeyboardInterrupt):
+    """Signals that the test run was interrupted."""
+
+    __module__ = "builtins"  # For py3.
+
+
+class Failed(Exception):
+    """Signals a stop as failed test run."""
+
+
+@dataclasses.dataclass
+class _bestrelpath_cache(Dict[Path, str]):
+    __slots__ = ("path",)
+
+    path: Path
+
+    def __missing__(self, path: Path) -> str:
+        r = bestrelpath(self.path, path)
+        self[path] = r
+        return r
+
+
+@final
+class Session(nodes.FSCollector):
+    """The root of the collection tree.
+
+    ``Session`` collects the initial paths given as arguments to pytest.
+    """
+
+    Interrupted = Interrupted
+    Failed = Failed
+    # Set on the session by runner.pytest_sessionstart.
+    _setupstate: SetupState
+    # Set on the session by fixtures.pytest_sessionstart.
+    _fixturemanager: FixtureManager
+    exitstatus: Union[int, ExitCode]
+
+    def __init__(self, config: Config) -> None:
+        super().__init__(
+            path=config.rootpath,
+            fspath=None,
+            parent=None,
+            config=config,
+            session=self,
+            nodeid="",
+        )
+        self.testsfailed = 0
+        self.testscollected = 0
+        self.shouldstop: Union[bool, str] = False
+        self.shouldfail: Union[bool, str] = False
+        self.trace = config.trace.root.get("collection")
+        self._initialpaths: FrozenSet[Path] = frozenset()
+
+        self._bestrelpathcache: Dict[Path, str] = _bestrelpath_cache(config.rootpath)
+
+        self.config.pluginmanager.register(self, name="session")
+
+    @classmethod
+    def from_config(cls, config: Config) -> "Session":
+        session: Session = cls._create(config=config)
+        return session
+
+    def __repr__(self) -> str:
+        return "<%s %s exitstatus=%r testsfailed=%d testscollected=%d>" % (
+            self.__class__.__name__,
+            self.name,
+            getattr(self, "exitstatus", "<UNSET>"),
+            self.testsfailed,
+            self.testscollected,
+        )
+
+    @property
+    def startpath(self) -> Path:
+        """The path from which pytest was invoked.
+
+        .. versionadded:: 7.0.0
+        """
+        return self.config.invocation_params.dir
+
+    def _node_location_to_relpath(self, node_path: Path) -> str:
+        # bestrelpath is a quite slow function.
+        return self._bestrelpathcache[node_path]
+
+    @hookimpl(tryfirst=True)
+    def pytest_collectstart(self) -> None:
+        if self.shouldfail:
+            raise self.Failed(self.shouldfail)
+        if self.shouldstop:
+            raise self.Interrupted(self.shouldstop)
+
+    @hookimpl(tryfirst=True)
+    def pytest_runtest_logreport(
+        self, report: Union[TestReport, CollectReport]
+    ) -> None:
+        if report.failed and not hasattr(report, "wasxfail"):
+            self.testsfailed += 1
+            maxfail = self.config.getvalue("maxfail")
+            if maxfail and self.testsfailed >= maxfail:
+                self.shouldfail = "stopping after %d failures" % (self.testsfailed)
+
+    pytest_collectreport = pytest_runtest_logreport
+
+    def isinitpath(self, path: Union[str, "os.PathLike[str]"]) -> bool:
+        # Optimization: Path(Path(...)) is much slower than isinstance.
+        path_ = path if isinstance(path, Path) else Path(path)
+        return path_ in self._initialpaths
+
+    def gethookproxy(self, fspath: "os.PathLike[str]"):
+        # Optimization: Path(Path(...)) is much slower than isinstance.
+        path = fspath if isinstance(fspath, Path) else Path(fspath)
+        pm = self.config.pluginmanager
+        # Check if we have the common case of running
+        # hooks with all conftest.py files.
+        my_conftestmodules = pm._getconftestmodules(
+            path,
+            self.config.getoption("importmode"),
+            rootpath=self.config.rootpath,
+        )
+        remove_mods = pm._conftest_plugins.difference(my_conftestmodules)
+        if remove_mods:
+            # One or more conftests are not in use at this fspath.
+            from .config.compat import PathAwareHookProxy
+
+            proxy = PathAwareHookProxy(FSHookProxy(pm, remove_mods))
+        else:
+            # All plugins are active for this fspath.
+            proxy = self.config.hook
+        return proxy
+
+    def _recurse(self, direntry: "os.DirEntry[str]") -> bool:
+        if direntry.name == "__pycache__":
+            return False
+        fspath = Path(direntry.path)
+        ihook = self.gethookproxy(fspath.parent)
+        if ihook.pytest_ignore_collect(collection_path=fspath, config=self.config):
+            return False
+        return True
+
+    def _collectfile(
+        self, fspath: Path, handle_dupes: bool = True
+    ) -> Sequence[nodes.Collector]:
+        assert (
+            fspath.is_file()
+        ), "{!r} is not a file (isdir={!r}, exists={!r}, islink={!r})".format(
+            fspath, fspath.is_dir(), fspath.exists(), fspath.is_symlink()
+        )
+        ihook = self.gethookproxy(fspath)
+        if not self.isinitpath(fspath):
+            if ihook.pytest_ignore_collect(collection_path=fspath, config=self.config):
+                return ()
+
+        if handle_dupes:
+            keepduplicates = self.config.getoption("keepduplicates")
+            if not keepduplicates:
+                duplicate_paths = self.config.pluginmanager._duplicatepaths
+                if fspath in duplicate_paths:
+                    return ()
+                else:
+                    duplicate_paths.add(fspath)
+
+        return ihook.pytest_collect_file(file_path=fspath, parent=self)  # type: ignore[no-any-return]
+
+    @overload
+    def perform_collect(
+        self, args: Optional[Sequence[str]] = ..., genitems: "Literal[True]" = ...
+    ) -> Sequence[nodes.Item]:
+        ...
+
+    @overload
+    def perform_collect(  # noqa: F811
+        self, args: Optional[Sequence[str]] = ..., genitems: bool = ...
+    ) -> Sequence[Union[nodes.Item, nodes.Collector]]:
+        ...
+
+    def perform_collect(  # noqa: F811
+        self, args: Optional[Sequence[str]] = None, genitems: bool = True
+    ) -> Sequence[Union[nodes.Item, nodes.Collector]]:
+        """Perform the collection phase for this session.
+
+        This is called by the default :hook:`pytest_collection` hook
+        implementation; see the documentation of this hook for more details.
+        For testing purposes, it may also be called directly on a fresh
+        ``Session``.
+
+        This function normally recursively expands any collectors collected
+        from the session to their items, and only items are returned. For
+        testing purposes, this may be suppressed by passing ``genitems=False``,
+        in which case the return value contains these collectors unexpanded,
+        and ``session.items`` is empty.
+        """
+        if args is None:
+            args = self.config.args
+
+        self.trace("perform_collect", self, args)
+        self.trace.root.indent += 1
+
+        self._notfound: List[Tuple[str, Sequence[nodes.Collector]]] = []
+        self._initial_parts: List[Tuple[Path, List[str]]] = []
+        self.items: List[nodes.Item] = []
+
+        hook = self.config.hook
+
+        items: Sequence[Union[nodes.Item, nodes.Collector]] = self.items
+        try:
+            initialpaths: List[Path] = []
+            for arg in args:
+                fspath, parts = resolve_collection_argument(
+                    self.config.invocation_params.dir,
+                    arg,
+                    as_pypath=self.config.option.pyargs,
+                )
+                self._initial_parts.append((fspath, parts))
+                initialpaths.append(fspath)
+            self._initialpaths = frozenset(initialpaths)
+            rep = collect_one_node(self)
+            self.ihook.pytest_collectreport(report=rep)
+            self.trace.root.indent -= 1
+            if self._notfound:
+                errors = []
+                for arg, collectors in self._notfound:
+                    if collectors:
+                        errors.append(
+                            f"not found: {arg}\n(no name {arg!r} in any of {collectors!r})"
+                        )
+                    else:
+                        errors.append(f"found no collectors for {arg}")
+
+                raise UsageError(*errors)
+            if not genitems:
+                items = rep.result
+            else:
+                if rep.passed:
+                    for node in rep.result:
+                        self.items.extend(self.genitems(node))
+
+            self.config.pluginmanager.check_pending()
+            hook.pytest_collection_modifyitems(
+                session=self, config=self.config, items=items
+            )
+        finally:
+            hook.pytest_collection_finish(session=self)
+
+        self.testscollected = len(items)
+        return items
+
+    def collect(self) -> Iterator[Union[nodes.Item, nodes.Collector]]:
+        from _pytest.python import Package
+
+        # Keep track of any collected nodes in here, so we don't duplicate fixtures.
+        node_cache1: Dict[Path, Sequence[nodes.Collector]] = {}
+        node_cache2: Dict[Tuple[Type[nodes.Collector], Path], nodes.Collector] = {}
+
+        # Keep track of any collected collectors in matchnodes paths, so they
+        # are not collected more than once.
+        matchnodes_cache: Dict[Tuple[Type[nodes.Collector], str], CollectReport] = {}
+
+        # Directories of pkgs with dunder-init files.
+        pkg_roots: Dict[Path, Package] = {}
+
+        for argpath, names in self._initial_parts:
+            self.trace("processing argument", (argpath, names))
+            self.trace.root.indent += 1
+
+            # Start with a Session root, and delve to argpath item (dir or file)
+            # and stack all Packages found on the way.
+            # No point in finding packages when collecting doctests.
+            if not self.config.getoption("doctestmodules", False):
+                pm = self.config.pluginmanager
+                for parent in (argpath, *argpath.parents):
+                    if not pm._is_in_confcutdir(argpath):
+                        break
+
+                    if parent.is_dir():
+                        pkginit = parent / "__init__.py"
+                        if pkginit.is_file() and pkginit not in node_cache1:
+                            col = self._collectfile(pkginit, handle_dupes=False)
+                            if col:
+                                if isinstance(col[0], Package):
+                                    pkg_roots[parent] = col[0]
+                                node_cache1[col[0].path] = [col[0]]
+
+            # If it's a directory argument, recurse and look for any Subpackages.
+            # Let the Package collector deal with subnodes, don't collect here.
+            if argpath.is_dir():
+                assert not names, f"invalid arg {(argpath, names)!r}"
+
+                seen_dirs: Set[Path] = set()
+                for direntry in visit(argpath, self._recurse):
+                    if not direntry.is_file():
+                        continue
+
+                    path = Path(direntry.path)
+                    dirpath = path.parent
+
+                    if dirpath not in seen_dirs:
+                        # Collect packages first.
+                        seen_dirs.add(dirpath)
+                        pkginit = dirpath / "__init__.py"
+                        if pkginit.exists():
+                            for x in self._collectfile(pkginit):
+                                yield x
+                                if isinstance(x, Package):
+                                    pkg_roots[dirpath] = x
+                    if dirpath in pkg_roots:
+                        # Do not collect packages here.
+                        continue
+
+                    for x in self._collectfile(path):
+                        key2 = (type(x), x.path)
+                        if key2 in node_cache2:
+                            yield node_cache2[key2]
+                        else:
+                            node_cache2[key2] = x
+                            yield x
+            else:
+                assert argpath.is_file()
+
+                if argpath in node_cache1:
+                    col = node_cache1[argpath]
+                else:
+                    collect_root = pkg_roots.get(argpath.parent, self)
+                    col = collect_root._collectfile(argpath, handle_dupes=False)
+                    if col:
+                        node_cache1[argpath] = col
+
+                matching = []
+                work: List[
+                    Tuple[Sequence[Union[nodes.Item, nodes.Collector]], Sequence[str]]
+                ] = [(col, names)]
+                while work:
+                    self.trace("matchnodes", col, names)
+                    self.trace.root.indent += 1
+
+                    matchnodes, matchnames = work.pop()
+                    for node in matchnodes:
+                        if not matchnames:
+                            matching.append(node)
+                            continue
+                        if not isinstance(node, nodes.Collector):
+                            continue
+                        key = (type(node), node.nodeid)
+                        if key in matchnodes_cache:
+                            rep = matchnodes_cache[key]
+                        else:
+                            rep = collect_one_node(node)
+                            matchnodes_cache[key] = rep
+                        if rep.passed:
+                            submatchnodes = []
+                            for r in rep.result:
+                                # TODO: Remove parametrized workaround once collection structure contains
+                                # parametrization.
+                                if (
+                                    r.name == matchnames[0]
+                                    or r.name.split("[")[0] == matchnames[0]
+                                ):
+                                    submatchnodes.append(r)
+                            if submatchnodes:
+                                work.append((submatchnodes, matchnames[1:]))
+                        else:
+                            # Report collection failures here to avoid failing to run some test
+                            # specified in the command line because the module could not be
+                            # imported (#134).
+                            node.ihook.pytest_collectreport(report=rep)
+
+                    self.trace("matchnodes finished -> ", len(matching), "nodes")
+                    self.trace.root.indent -= 1
+
+                if not matching:
+                    report_arg = "::".join((str(argpath), *names))
+                    self._notfound.append((report_arg, col))
+                    continue
+
+                # If __init__.py was the only file requested, then the matched
+                # node will be the corresponding Package (by default), and the
+                # first yielded item will be the __init__ Module itself, so
+                # just use that. If this special case isn't taken, then all the
+                # files in the package will be yielded.
+                if argpath.name == "__init__.py" and isinstance(matching[0], Package):
+                    try:
+                        yield next(iter(matching[0].collect()))
+                    except StopIteration:
+                        # The package collects nothing with only an __init__.py
+                        # file in it, which gets ignored by the default
+                        # "python_files" option.
+                        pass
+                    continue
+
+                yield from matching
+
+            self.trace.root.indent -= 1
+
+    def genitems(
+        self, node: Union[nodes.Item, nodes.Collector]
+    ) -> Iterator[nodes.Item]:
+        self.trace("genitems", node)
+        if isinstance(node, nodes.Item):
+            node.ihook.pytest_itemcollected(item=node)
+            yield node
+        else:
+            assert isinstance(node, nodes.Collector)
+            rep = collect_one_node(node)
+            if rep.passed:
+                for subnode in rep.result:
+                    yield from self.genitems(subnode)
+            node.ihook.pytest_collectreport(report=rep)
+
+
+def search_pypath(module_name: str) -> str:
+    """Search sys.path for the given a dotted module name, and return its file system path."""
+    try:
+        spec = importlib.util.find_spec(module_name)
+    # AttributeError: looks like package module, but actually filename
+    # ImportError: module does not exist
+    # ValueError: not a module name
+    except (AttributeError, ImportError, ValueError):
+        return module_name
+    if spec is None or spec.origin is None or spec.origin == "namespace":
+        return module_name
+    elif spec.submodule_search_locations:
+        return os.path.dirname(spec.origin)
+    else:
+        return spec.origin
+
+
+def resolve_collection_argument(
+    invocation_path: Path, arg: str, *, as_pypath: bool = False
+) -> Tuple[Path, List[str]]:
+    """Parse path arguments optionally containing selection parts and return (fspath, names).
+
+    Command-line arguments can point to files and/or directories, and optionally contain
+    parts for specific tests selection, for example:
+
+        "pkg/tests/test_foo.py::TestClass::test_foo"
+
+    This function ensures the path exists, and returns a tuple:
+
+        (Path("/full/path/to/pkg/tests/test_foo.py"), ["TestClass", "test_foo"])
+
+    When as_pypath is True, expects that the command-line argument actually contains
+    module paths instead of file-system paths:
+
+        "pkg.tests.test_foo::TestClass::test_foo"
+
+    In which case we search sys.path for a matching module, and then return the *path* to the
+    found module.
+
+    If the path doesn't exist, raise UsageError.
+    If the path is a directory and selection parts are present, raise UsageError.
+    """
+    base, squacket, rest = str(arg).partition("[")
+    strpath, *parts = base.split("::")
+    if parts:
+        parts[-1] = f"{parts[-1]}{squacket}{rest}"
+    if as_pypath:
+        strpath = search_pypath(strpath)
+    fspath = invocation_path / strpath
+    fspath = absolutepath(fspath)
+    if not safe_exists(fspath):
+        msg = (
+            "module or package not found: {arg} (missing __init__.py?)"
+            if as_pypath
+            else "file or directory not found: {arg}"
+        )
+        raise UsageError(msg.format(arg=arg))
+    if parts and fspath.is_dir():
+        msg = (
+            "package argument cannot contain :: selection parts: {arg}"
+            if as_pypath
+            else "directory argument cannot contain :: selection parts: {arg}"
+        )
+        raise UsageError(msg.format(arg=arg))
+    return fspath, parts
diff --git a/contrib/python/pytest/py3/_pytest/mark/__init__.py b/contrib/python/pytest/py3/_pytest/mark/__init__.py
new file mode 100644
index 0000000000..de46b4c8a7
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/mark/__init__.py
@@ -0,0 +1,269 @@
+"""Generic mechanism for marking and selecting python functions."""
+import dataclasses
+from typing import AbstractSet
+from typing import Collection
+from typing import List
+from typing import Optional
+from typing import TYPE_CHECKING
+from typing import Union
+
+from .expression import Expression
+from .expression import ParseError
+from .structures import EMPTY_PARAMETERSET_OPTION
+from .structures import get_empty_parameterset_mark
+from .structures import Mark
+from .structures import MARK_GEN
+from .structures import MarkDecorator
+from .structures import MarkGenerator
+from .structures import ParameterSet
+from _pytest.config import Config
+from _pytest.config import ExitCode
+from _pytest.config import hookimpl
+from _pytest.config import UsageError
+from _pytest.config.argparsing import Parser
+from _pytest.stash import StashKey
+
+if TYPE_CHECKING:
+    from _pytest.nodes import Item
+
+
+__all__ = [
+    "MARK_GEN",
+    "Mark",
+    "MarkDecorator",
+    "MarkGenerator",
+    "ParameterSet",
+    "get_empty_parameterset_mark",
+]
+
+
+old_mark_config_key = StashKey[Optional[Config]]()
+
+
+def param(
+    *values: object,
+    marks: Union[MarkDecorator, Collection[Union[MarkDecorator, Mark]]] = (),
+    id: Optional[str] = None,
+) -> ParameterSet:
+    """Specify a parameter in `pytest.mark.parametrize`_ calls or
+    :ref:`parametrized fixtures <fixture-parametrize-marks>`.
+
+    .. code-block:: python
+
+        @pytest.mark.parametrize(
+            "test_input,expected",
+            [
+                ("3+5", 8),
+                pytest.param("6*9", 42, marks=pytest.mark.xfail),
+            ],
+        )
+        def test_eval(test_input, expected):
+            assert eval(test_input) == expected
+
+    :param values: Variable args of the values of the parameter set, in order.
+    :param marks: A single mark or a list of marks to be applied to this parameter set.
+    :param id: The id to attribute to this parameter set.
+    """
+    return ParameterSet.param(*values, marks=marks, id=id)
+
+
+def pytest_addoption(parser: Parser) -> None:
+    group = parser.getgroup("general")
+    group._addoption(
+        "-k",
+        action="store",
+        dest="keyword",
+        default="",
+        metavar="EXPRESSION",
+        help="Only run tests which match the given substring expression. "
+        "An expression is a Python evaluatable expression "
+        "where all names are substring-matched against test names "
+        "and their parent classes. Example: -k 'test_method or test_"
+        "other' matches all test functions and classes whose name "
+        "contains 'test_method' or 'test_other', while -k 'not test_method' "
+        "matches those that don't contain 'test_method' in their names. "
+        "-k 'not test_method and not test_other' will eliminate the matches. "
+        "Additionally keywords are matched to classes and functions "
+        "containing extra names in their 'extra_keyword_matches' set, "
+        "as well as functions which have names assigned directly to them. "
+        "The matching is case-insensitive.",
+    )
+
+    group._addoption(
+        "-m",
+        action="store",
+        dest="markexpr",
+        default="",
+        metavar="MARKEXPR",
+        help="Only run tests matching given mark expression. "
+        "For example: -m 'mark1 and not mark2'.",
+    )
+
+    group.addoption(
+        "--markers",
+        action="store_true",
+        help="show markers (builtin, plugin and per-project ones).",
+    )
+
+    parser.addini("markers", "Markers for test functions", "linelist")
+    parser.addini(EMPTY_PARAMETERSET_OPTION, "Default marker for empty parametersets")
+
+
+@hookimpl(tryfirst=True)
+def pytest_cmdline_main(config: Config) -> Optional[Union[int, ExitCode]]:
+    import _pytest.config
+
+    if config.option.markers:
+        config._do_configure()
+        tw = _pytest.config.create_terminal_writer(config)
+        for line in config.getini("markers"):
+            parts = line.split(":", 1)
+            name = parts[0]
+            rest = parts[1] if len(parts) == 2 else ""
+            tw.write("@pytest.mark.%s:" % name, bold=True)
+            tw.line(rest)
+            tw.line()
+        config._ensure_unconfigure()
+        return 0
+
+    return None
+
+
+@dataclasses.dataclass
+class KeywordMatcher:
+    """A matcher for keywords.
+
+    Given a list of names, matches any substring of one of these names. The
+    string inclusion check is case-insensitive.
+
+    Will match on the name of colitem, including the names of its parents.
+    Only matches names of items which are either a :class:`Class` or a
+    :class:`Function`.
+
+    Additionally, matches on names in the 'extra_keyword_matches' set of
+    any item, as well as names directly assigned to test functions.
+    """
+
+    __slots__ = ("_names",)
+
+    _names: AbstractSet[str]
+
+    @classmethod
+    def from_item(cls, item: "Item") -> "KeywordMatcher":
+        mapped_names = set()
+
+        # Add the names of the current item and any parent items.
+        import pytest
+
+        for node in item.listchain():
+            if not isinstance(node, pytest.Session):
+                mapped_names.add(node.name)
+
+        # Add the names added as extra keywords to current or parent items.
+        mapped_names.update(item.listextrakeywords())
+
+        # Add the names attached to the current function through direct assignment.
+        function_obj = getattr(item, "function", None)
+        if function_obj:
+            mapped_names.update(function_obj.__dict__)
+
+        # Add the markers to the keywords as we no longer handle them correctly.
+        mapped_names.update(mark.name for mark in item.iter_markers())
+
+        return cls(mapped_names)
+
+    def __call__(self, subname: str) -> bool:
+        subname = subname.lower()
+        names = (name.lower() for name in self._names)
+
+        for name in names:
+            if subname in name:
+                return True
+        return False
+
+
+def deselect_by_keyword(items: "List[Item]", config: Config) -> None:
+    keywordexpr = config.option.keyword.lstrip()
+    if not keywordexpr:
+        return
+
+    expr = _parse_expression(keywordexpr, "Wrong expression passed to '-k'")
+
+    remaining = []
+    deselected = []
+    for colitem in items:
+        if not expr.evaluate(KeywordMatcher.from_item(colitem)):
+            deselected.append(colitem)
+        else:
+            remaining.append(colitem)
+
+    if deselected:
+        config.hook.pytest_deselected(items=deselected)
+        items[:] = remaining
+
+
+@dataclasses.dataclass
+class MarkMatcher:
+    """A matcher for markers which are present.
+
+    Tries to match on any marker names, attached to the given colitem.
+    """
+
+    __slots__ = ("own_mark_names",)
+
+    own_mark_names: AbstractSet[str]
+
+    @classmethod
+    def from_item(cls, item: "Item") -> "MarkMatcher":
+        mark_names = {mark.name for mark in item.iter_markers()}
+        return cls(mark_names)
+
+    def __call__(self, name: str) -> bool:
+        return name in self.own_mark_names
+
+
+def deselect_by_mark(items: "List[Item]", config: Config) -> None:
+    matchexpr = config.option.markexpr
+    if not matchexpr:
+        return
+
+    expr = _parse_expression(matchexpr, "Wrong expression passed to '-m'")
+    remaining: List[Item] = []
+    deselected: List[Item] = []
+    for item in items:
+        if expr.evaluate(MarkMatcher.from_item(item)):
+            remaining.append(item)
+        else:
+            deselected.append(item)
+    if deselected:
+        config.hook.pytest_deselected(items=deselected)
+        items[:] = remaining
+
+
+def _parse_expression(expr: str, exc_message: str) -> Expression:
+    try:
+        return Expression.compile(expr)
+    except ParseError as e:
+        raise UsageError(f"{exc_message}: {expr}: {e}") from None
+
+
+def pytest_collection_modifyitems(items: "List[Item]", config: Config) -> None:
+    deselect_by_keyword(items, config)
+    deselect_by_mark(items, config)
+
+
+def pytest_configure(config: Config) -> None:
+    config.stash[old_mark_config_key] = MARK_GEN._config
+    MARK_GEN._config = config
+
+    empty_parameterset = config.getini(EMPTY_PARAMETERSET_OPTION)
+
+    if empty_parameterset not in ("skip", "xfail", "fail_at_collect", None, ""):
+        raise UsageError(
+            "{!s} must be one of skip, xfail or fail_at_collect"
+            " but it is {!r}".format(EMPTY_PARAMETERSET_OPTION, empty_parameterset)
+        )
+
+
+def pytest_unconfigure(config: Config) -> None:
+    MARK_GEN._config = config.stash.get(old_mark_config_key, None)
diff --git a/contrib/python/pytest/py3/_pytest/mark/expression.py b/contrib/python/pytest/py3/_pytest/mark/expression.py
new file mode 100644
index 0000000000..9287bcee50
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/mark/expression.py
@@ -0,0 +1,228 @@
+r"""Evaluate match expressions, as used by `-k` and `-m`.
+
+The grammar is:
+
+expression: expr? EOF
+expr:       and_expr ('or' and_expr)*
+and_expr:   not_expr ('and' not_expr)*
+not_expr:   'not' not_expr | '(' expr ')' | ident
+ident:      (\w|:|\+|-|\.|\[|\]|\\|/)+
+
+The semantics are:
+
+- Empty expression evaluates to False.
+- ident evaluates to True of False according to a provided matcher function.
+- or/and/not evaluate according to the usual boolean semantics.
+"""
+import ast
+import dataclasses
+import enum
+import re
+import sys
+import types
+from typing import Callable
+from typing import Iterator
+from typing import Mapping
+from typing import NoReturn
+from typing import Optional
+from typing import Sequence
+
+if sys.version_info >= (3, 8):
+    astNameConstant = ast.Constant
+else:
+    astNameConstant = ast.NameConstant
+
+
+__all__ = [
+    "Expression",
+    "ParseError",
+]
+
+
+class TokenType(enum.Enum):
+    LPAREN = "left parenthesis"
+    RPAREN = "right parenthesis"
+    OR = "or"
+    AND = "and"
+    NOT = "not"
+    IDENT = "identifier"
+    EOF = "end of input"
+
+
+@dataclasses.dataclass(frozen=True)
+class Token:
+    __slots__ = ("type", "value", "pos")
+    type: TokenType
+    value: str
+    pos: int
+
+
+class ParseError(Exception):
+    """The expression contains invalid syntax.
+
+    :param column: The column in the line where the error occurred (1-based).
+    :param message: A description of the error.
+    """
+
+    def __init__(self, column: int, message: str) -> None:
+        self.column = column
+        self.message = message
+
+    def __str__(self) -> str:
+        return f"at column {self.column}: {self.message}"
+
+
+class Scanner:
+    __slots__ = ("tokens", "current")
+
+    def __init__(self, input: str) -> None:
+        self.tokens = self.lex(input)
+        self.current = next(self.tokens)
+
+    def lex(self, input: str) -> Iterator[Token]:
+        pos = 0
+        while pos < len(input):
+            if input[pos] in (" ", "\t"):
+                pos += 1
+            elif input[pos] == "(":
+                yield Token(TokenType.LPAREN, "(", pos)
+                pos += 1
+            elif input[pos] == ")":
+                yield Token(TokenType.RPAREN, ")", pos)
+                pos += 1
+            else:
+                match = re.match(r"(:?\w|:|\+|-|\.|\[|\]|\\|/)+", input[pos:])
+                if match:
+                    value = match.group(0)
+                    if value == "or":
+                        yield Token(TokenType.OR, value, pos)
+                    elif value == "and":
+                        yield Token(TokenType.AND, value, pos)
+                    elif value == "not":
+                        yield Token(TokenType.NOT, value, pos)
+                    else:
+                        yield Token(TokenType.IDENT, value, pos)
+                    pos += len(value)
+                else:
+                    raise ParseError(
+                        pos + 1,
+                        f'unexpected character "{input[pos]}"',
+                    )
+        yield Token(TokenType.EOF, "", pos)
+
+    def accept(self, type: TokenType, *, reject: bool = False) -> Optional[Token]:
+        if self.current.type is type:
+            token = self.current
+            if token.type is not TokenType.EOF:
+                self.current = next(self.tokens)
+            return token
+        if reject:
+            self.reject((type,))
+        return None
+
+    def reject(self, expected: Sequence[TokenType]) -> NoReturn:
+        raise ParseError(
+            self.current.pos + 1,
+            "expected {}; got {}".format(
+                " OR ".join(type.value for type in expected),
+                self.current.type.value,
+            ),
+        )
+
+
+# True, False and None are legal match expression identifiers,
+# but illegal as Python identifiers. To fix this, this prefix
+# is added to identifiers in the conversion to Python AST.
+IDENT_PREFIX = "$"
+
+
+def expression(s: Scanner) -> ast.Expression:
+    if s.accept(TokenType.EOF):
+        ret: ast.expr = astNameConstant(False)
+    else:
+        ret = expr(s)
+        s.accept(TokenType.EOF, reject=True)
+    return ast.fix_missing_locations(ast.Expression(ret))
+
+
+def expr(s: Scanner) -> ast.expr:
+    ret = and_expr(s)
+    while s.accept(TokenType.OR):
+        rhs = and_expr(s)
+        ret = ast.BoolOp(ast.Or(), [ret, rhs])
+    return ret
+
+
+def and_expr(s: Scanner) -> ast.expr:
+    ret = not_expr(s)
+    while s.accept(TokenType.AND):
+        rhs = not_expr(s)
+        ret = ast.BoolOp(ast.And(), [ret, rhs])
+    return ret
+
+
+def not_expr(s: Scanner) -> ast.expr:
+    if s.accept(TokenType.NOT):
+        return ast.UnaryOp(ast.Not(), not_expr(s))
+    if s.accept(TokenType.LPAREN):
+        ret = expr(s)
+        s.accept(TokenType.RPAREN, reject=True)
+        return ret
+    ident = s.accept(TokenType.IDENT)
+    if ident:
+        return ast.Name(IDENT_PREFIX + ident.value, ast.Load())
+    s.reject((TokenType.NOT, TokenType.LPAREN, TokenType.IDENT))
+
+
+class MatcherAdapter(Mapping[str, bool]):
+    """Adapts a matcher function to a locals mapping as required by eval()."""
+
+    def __init__(self, matcher: Callable[[str], bool]) -> None:
+        self.matcher = matcher
+
+    def __getitem__(self, key: str) -> bool:
+        return self.matcher(key[len(IDENT_PREFIX) :])
+
+    def __iter__(self) -> Iterator[str]:
+        raise NotImplementedError()
+
+    def __len__(self) -> int:
+        raise NotImplementedError()
+
+
+class Expression:
+    """A compiled match expression as used by -k and -m.
+
+    The expression can be evaluated against different matchers.
+    """
+
+    __slots__ = ("code",)
+
+    def __init__(self, code: types.CodeType) -> None:
+        self.code = code
+
+    @classmethod
+    def compile(self, input: str) -> "Expression":
+        """Compile a match expression.
+
+        :param input: The input expression - one line.
+        """
+        astexpr = expression(Scanner(input))
+        code: types.CodeType = compile(
+            astexpr,
+            filename="<pytest match expression>",
+            mode="eval",
+        )
+        return Expression(code)
+
+    def evaluate(self, matcher: Callable[[str], bool]) -> bool:
+        """Evaluate the match expression.
+
+        :param matcher:
+            Given an identifier, should return whether it matches or not.
+            Should be prepared to handle arbitrary strings as input.
+
+        :returns: Whether the expression matches or not.
+        """
+        ret: bool = eval(self.code, {"__builtins__": {}}, MatcherAdapter(matcher))
+        return ret
diff --git a/contrib/python/pytest/py3/_pytest/mark/structures.py b/contrib/python/pytest/py3/_pytest/mark/structures.py
new file mode 100644
index 0000000000..42fb294c6d
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/mark/structures.py
@@ -0,0 +1,619 @@
+import collections.abc
+import dataclasses
+import inspect
+import warnings
+from typing import Any
+from typing import Callable
+from typing import Collection
+from typing import Iterable
+from typing import Iterator
+from typing import List
+from typing import Mapping
+from typing import MutableMapping
+from typing import NamedTuple
+from typing import Optional
+from typing import overload
+from typing import Sequence
+from typing import Set
+from typing import Tuple
+from typing import Type
+from typing import TYPE_CHECKING
+from typing import TypeVar
+from typing import Union
+
+from .._code import getfslineno
+from ..compat import ascii_escaped
+from ..compat import final
+from ..compat import NOTSET
+from ..compat import NotSetType
+from _pytest.config import Config
+from _pytest.deprecated import check_ispytest
+from _pytest.outcomes import fail
+from _pytest.warning_types import PytestUnknownMarkWarning
+
+if TYPE_CHECKING:
+    from ..nodes import Node
+
+
+EMPTY_PARAMETERSET_OPTION = "empty_parameter_set_mark"
+
+
+def istestfunc(func) -> bool:
+    return callable(func) and getattr(func, "__name__", "<lambda>") != "<lambda>"
+
+
+def get_empty_parameterset_mark(
+    config: Config, argnames: Sequence[str], func
+) -> "MarkDecorator":
+    from ..nodes import Collector
+
+    fs, lineno = getfslineno(func)
+    reason = "got empty parameter set %r, function %s at %s:%d" % (
+        argnames,
+        func.__name__,
+        fs,
+        lineno,
+    )
+
+    requested_mark = config.getini(EMPTY_PARAMETERSET_OPTION)
+    if requested_mark in ("", None, "skip"):
+        mark = MARK_GEN.skip(reason=reason)
+    elif requested_mark == "xfail":
+        mark = MARK_GEN.xfail(reason=reason, run=False)
+    elif requested_mark == "fail_at_collect":
+        f_name = func.__name__
+        _, lineno = getfslineno(func)
+        raise Collector.CollectError(
+            "Empty parameter set in '%s' at line %d" % (f_name, lineno + 1)
+        )
+    else:
+        raise LookupError(requested_mark)
+    return mark
+
+
+class ParameterSet(NamedTuple):
+    values: Sequence[Union[object, NotSetType]]
+    marks: Collection[Union["MarkDecorator", "Mark"]]
+    id: Optional[str]
+
+    @classmethod
+    def param(
+        cls,
+        *values: object,
+        marks: Union["MarkDecorator", Collection[Union["MarkDecorator", "Mark"]]] = (),
+        id: Optional[str] = None,
+    ) -> "ParameterSet":
+        if isinstance(marks, MarkDecorator):
+            marks = (marks,)
+        else:
+            assert isinstance(marks, collections.abc.Collection)
+
+        if id is not None:
+            if not isinstance(id, str):
+                raise TypeError(f"Expected id to be a string, got {type(id)}: {id!r}")
+            id = ascii_escaped(id)
+        return cls(values, marks, id)
+
+    @classmethod
+    def extract_from(
+        cls,
+        parameterset: Union["ParameterSet", Sequence[object], object],
+        force_tuple: bool = False,
+    ) -> "ParameterSet":
+        """Extract from an object or objects.
+
+        :param parameterset:
+            A legacy style parameterset that may or may not be a tuple,
+            and may or may not be wrapped into a mess of mark objects.
+
+        :param force_tuple:
+            Enforce tuple wrapping so single argument tuple values
+            don't get decomposed and break tests.
+        """
+
+        if isinstance(parameterset, cls):
+            return parameterset
+        if force_tuple:
+            return cls.param(parameterset)
+        else:
+            # TODO: Refactor to fix this type-ignore. Currently the following
+            # passes type-checking but crashes:
+            #
+            #   @pytest.mark.parametrize(('x', 'y'), [1, 2])
+            #   def test_foo(x, y): pass
+            return cls(parameterset, marks=[], id=None)  # type: ignore[arg-type]
+
+    @staticmethod
+    def _parse_parametrize_args(
+        argnames: Union[str, Sequence[str]],
+        argvalues: Iterable[Union["ParameterSet", Sequence[object], object]],
+        *args,
+        **kwargs,
+    ) -> Tuple[Sequence[str], bool]:
+        if isinstance(argnames, str):
+            argnames = [x.strip() for x in argnames.split(",") if x.strip()]
+            force_tuple = len(argnames) == 1
+        else:
+            force_tuple = False
+        return argnames, force_tuple
+
+    @staticmethod
+    def _parse_parametrize_parameters(
+        argvalues: Iterable[Union["ParameterSet", Sequence[object], object]],
+        force_tuple: bool,
+    ) -> List["ParameterSet"]:
+        return [
+            ParameterSet.extract_from(x, force_tuple=force_tuple) for x in argvalues
+        ]
+
+    @classmethod
+    def _for_parametrize(
+        cls,
+        argnames: Union[str, Sequence[str]],
+        argvalues: Iterable[Union["ParameterSet", Sequence[object], object]],
+        func,
+        config: Config,
+        nodeid: str,
+    ) -> Tuple[Sequence[str], List["ParameterSet"]]:
+        argnames, force_tuple = cls._parse_parametrize_args(argnames, argvalues)
+        parameters = cls._parse_parametrize_parameters(argvalues, force_tuple)
+        del argvalues
+
+        if parameters:
+            # Check all parameter sets have the correct number of values.
+            for param in parameters:
+                if len(param.values) != len(argnames):
+                    msg = (
+                        '{nodeid}: in "parametrize" the number of names ({names_len}):\n'
+                        "  {names}\n"
+                        "must be equal to the number of values ({values_len}):\n"
+                        "  {values}"
+                    )
+                    fail(
+                        msg.format(
+                            nodeid=nodeid,
+                            values=param.values,
+                            names=argnames,
+                            names_len=len(argnames),
+                            values_len=len(param.values),
+                        ),
+                        pytrace=False,
+                    )
+        else:
+            # Empty parameter set (likely computed at runtime): create a single
+            # parameter set with NOTSET values, with the "empty parameter set" mark applied to it.
+            mark = get_empty_parameterset_mark(config, argnames, func)
+            parameters.append(
+                ParameterSet(values=(NOTSET,) * len(argnames), marks=[mark], id=None)
+            )
+        return argnames, parameters
+
+
+@final
+@dataclasses.dataclass(frozen=True)
+class Mark:
+    """A pytest mark."""
+
+    #: Name of the mark.
+    name: str
+    #: Positional arguments of the mark decorator.
+    args: Tuple[Any, ...]
+    #: Keyword arguments of the mark decorator.
+    kwargs: Mapping[str, Any]
+
+    #: Source Mark for ids with parametrize Marks.
+    _param_ids_from: Optional["Mark"] = dataclasses.field(default=None, repr=False)
+    #: Resolved/generated ids with parametrize Marks.
+    _param_ids_generated: Optional[Sequence[str]] = dataclasses.field(
+        default=None, repr=False
+    )
+
+    def __init__(
+        self,
+        name: str,
+        args: Tuple[Any, ...],
+        kwargs: Mapping[str, Any],
+        param_ids_from: Optional["Mark"] = None,
+        param_ids_generated: Optional[Sequence[str]] = None,
+        *,
+        _ispytest: bool = False,
+    ) -> None:
+        """:meta private:"""
+        check_ispytest(_ispytest)
+        # Weirdness to bypass frozen=True.
+        object.__setattr__(self, "name", name)
+        object.__setattr__(self, "args", args)
+        object.__setattr__(self, "kwargs", kwargs)
+        object.__setattr__(self, "_param_ids_from", param_ids_from)
+        object.__setattr__(self, "_param_ids_generated", param_ids_generated)
+
+    def _has_param_ids(self) -> bool:
+        return "ids" in self.kwargs or len(self.args) >= 4
+
+    def combined_with(self, other: "Mark") -> "Mark":
+        """Return a new Mark which is a combination of this
+        Mark and another Mark.
+
+        Combines by appending args and merging kwargs.
+
+        :param Mark other: The mark to combine with.
+        :rtype: Mark
+        """
+        assert self.name == other.name
+
+        # Remember source of ids with parametrize Marks.
+        param_ids_from: Optional[Mark] = None
+        if self.name == "parametrize":
+            if other._has_param_ids():
+                param_ids_from = other
+            elif self._has_param_ids():
+                param_ids_from = self
+
+        return Mark(
+            self.name,
+            self.args + other.args,
+            dict(self.kwargs, **other.kwargs),
+            param_ids_from=param_ids_from,
+            _ispytest=True,
+        )
+
+
+# A generic parameter designating an object to which a Mark may
+# be applied -- a test function (callable) or class.
+# Note: a lambda is not allowed, but this can't be represented.
+Markable = TypeVar("Markable", bound=Union[Callable[..., object], type])
+
+
+@dataclasses.dataclass
+class MarkDecorator:
+    """A decorator for applying a mark on test functions and classes.
+
+    ``MarkDecorators`` are created with ``pytest.mark``::
+
+        mark1 = pytest.mark.NAME              # Simple MarkDecorator
+        mark2 = pytest.mark.NAME(name1=value) # Parametrized MarkDecorator
+
+    and can then be applied as decorators to test functions::
+
+        @mark2
+        def test_function():
+            pass
+
+    When a ``MarkDecorator`` is called, it does the following:
+
+    1. If called with a single class as its only positional argument and no
+       additional keyword arguments, it attaches the mark to the class so it
+       gets applied automatically to all test cases found in that class.
+
+    2. If called with a single function as its only positional argument and
+       no additional keyword arguments, it attaches the mark to the function,
+       containing all the arguments already stored internally in the
+       ``MarkDecorator``.
+
+    3. When called in any other case, it returns a new ``MarkDecorator``
+       instance with the original ``MarkDecorator``'s content updated with
+       the arguments passed to this call.
+
+    Note: The rules above prevent a ``MarkDecorator`` from storing only a
+    single function or class reference as its positional argument with no
+    additional keyword or positional arguments. You can work around this by
+    using `with_args()`.
+    """
+
+    mark: Mark
+
+    def __init__(self, mark: Mark, *, _ispytest: bool = False) -> None:
+        """:meta private:"""
+        check_ispytest(_ispytest)
+        self.mark = mark
+
+    @property
+    def name(self) -> str:
+        """Alias for mark.name."""
+        return self.mark.name
+
+    @property
+    def args(self) -> Tuple[Any, ...]:
+        """Alias for mark.args."""
+        return self.mark.args
+
+    @property
+    def kwargs(self) -> Mapping[str, Any]:
+        """Alias for mark.kwargs."""
+        return self.mark.kwargs
+
+    @property
+    def markname(self) -> str:
+        """:meta private:"""
+        return self.name  # for backward-compat (2.4.1 had this attr)
+
+    def with_args(self, *args: object, **kwargs: object) -> "MarkDecorator":
+        """Return a MarkDecorator with extra arguments added.
+
+        Unlike calling the MarkDecorator, with_args() can be used even
+        if the sole argument is a callable/class.
+        """
+        mark = Mark(self.name, args, kwargs, _ispytest=True)
+        return MarkDecorator(self.mark.combined_with(mark), _ispytest=True)
+
+    # Type ignored because the overloads overlap with an incompatible
+    # return type. Not much we can do about that. Thankfully mypy picks
+    # the first match so it works out even if we break the rules.
+    @overload
+    def __call__(self, arg: Markable) -> Markable:  # type: ignore[misc]
+        pass
+
+    @overload
+    def __call__(self, *args: object, **kwargs: object) -> "MarkDecorator":
+        pass
+
+    def __call__(self, *args: object, **kwargs: object):
+        """Call the MarkDecorator."""
+        if args and not kwargs:
+            func = args[0]
+            is_class = inspect.isclass(func)
+            if len(args) == 1 and (istestfunc(func) or is_class):
+                store_mark(func, self.mark)
+                return func
+        return self.with_args(*args, **kwargs)
+
+
+def get_unpacked_marks(
+    obj: Union[object, type],
+    *,
+    consider_mro: bool = True,
+) -> List[Mark]:
+    """Obtain the unpacked marks that are stored on an object.
+
+    If obj is a class and consider_mro is true, return marks applied to
+    this class and all of its super-classes in MRO order. If consider_mro
+    is false, only return marks applied directly to this class.
+    """
+    if isinstance(obj, type):
+        if not consider_mro:
+            mark_lists = [obj.__dict__.get("pytestmark", [])]
+        else:
+            mark_lists = [x.__dict__.get("pytestmark", []) for x in obj.__mro__]
+        mark_list = []
+        for item in mark_lists:
+            if isinstance(item, list):
+                mark_list.extend(item)
+            else:
+                mark_list.append(item)
+    else:
+        mark_attribute = getattr(obj, "pytestmark", [])
+        if isinstance(mark_attribute, list):
+            mark_list = mark_attribute
+        else:
+            mark_list = [mark_attribute]
+    return list(normalize_mark_list(mark_list))
+
+
+def normalize_mark_list(
+    mark_list: Iterable[Union[Mark, MarkDecorator]]
+) -> Iterable[Mark]:
+    """
+    Normalize an iterable of Mark or MarkDecorator objects into a list of marks
+    by retrieving the `mark` attribute on MarkDecorator instances.
+
+    :param mark_list: marks to normalize
+    :returns: A new list of the extracted Mark objects
+    """
+    for mark in mark_list:
+        mark_obj = getattr(mark, "mark", mark)
+        if not isinstance(mark_obj, Mark):
+            raise TypeError(f"got {repr(mark_obj)} instead of Mark")
+        yield mark_obj
+
+
+def store_mark(obj, mark: Mark) -> None:
+    """Store a Mark on an object.
+
+    This is used to implement the Mark declarations/decorators correctly.
+    """
+    assert isinstance(mark, Mark), mark
+    # Always reassign name to avoid updating pytestmark in a reference that
+    # was only borrowed.
+    obj.pytestmark = [*get_unpacked_marks(obj, consider_mro=False), mark]
+
+
+# Typing for builtin pytest marks. This is cheating; it gives builtin marks
+# special privilege, and breaks modularity. But practicality beats purity...
+if TYPE_CHECKING:
+    from _pytest.scope import _ScopeName
+
+    class _SkipMarkDecorator(MarkDecorator):
+        @overload  # type: ignore[override,misc,no-overload-impl]
+        def __call__(self, arg: Markable) -> Markable:
+            ...
+
+        @overload
+        def __call__(self, reason: str = ...) -> "MarkDecorator":
+            ...
+
+    class _SkipifMarkDecorator(MarkDecorator):
+        def __call__(  # type: ignore[override]
+            self,
+            condition: Union[str, bool] = ...,
+            *conditions: Union[str, bool],
+            reason: str = ...,
+        ) -> MarkDecorator:
+            ...
+
+    class _XfailMarkDecorator(MarkDecorator):
+        @overload  # type: ignore[override,misc,no-overload-impl]
+        def __call__(self, arg: Markable) -> Markable:
+            ...
+
+        @overload
+        def __call__(
+            self,
+            condition: Union[str, bool] = ...,
+            *conditions: Union[str, bool],
+            reason: str = ...,
+            run: bool = ...,
+            raises: Union[Type[BaseException], Tuple[Type[BaseException], ...]] = ...,
+            strict: bool = ...,
+        ) -> MarkDecorator:
+            ...
+
+    class _ParametrizeMarkDecorator(MarkDecorator):
+        def __call__(  # type: ignore[override]
+            self,
+            argnames: Union[str, Sequence[str]],
+            argvalues: Iterable[Union[ParameterSet, Sequence[object], object]],
+            *,
+            indirect: Union[bool, Sequence[str]] = ...,
+            ids: Optional[
+                Union[
+                    Iterable[Union[None, str, float, int, bool]],
+                    Callable[[Any], Optional[object]],
+                ]
+            ] = ...,
+            scope: Optional[_ScopeName] = ...,
+        ) -> MarkDecorator:
+            ...
+
+    class _UsefixturesMarkDecorator(MarkDecorator):
+        def __call__(self, *fixtures: str) -> MarkDecorator:  # type: ignore[override]
+            ...
+
+    class _FilterwarningsMarkDecorator(MarkDecorator):
+        def __call__(self, *filters: str) -> MarkDecorator:  # type: ignore[override]
+            ...
+
+
+@final
+class MarkGenerator:
+    """Factory for :class:`MarkDecorator` objects - exposed as
+    a ``pytest.mark`` singleton instance.
+
+    Example::
+
+         import pytest
+
+         @pytest.mark.slowtest
+         def test_function():
+            pass
+
+    applies a 'slowtest' :class:`Mark` on ``test_function``.
+    """
+
+    # See TYPE_CHECKING above.
+    if TYPE_CHECKING:
+        skip: _SkipMarkDecorator
+        skipif: _SkipifMarkDecorator
+        xfail: _XfailMarkDecorator
+        parametrize: _ParametrizeMarkDecorator
+        usefixtures: _UsefixturesMarkDecorator
+        filterwarnings: _FilterwarningsMarkDecorator
+
+    def __init__(self, *, _ispytest: bool = False) -> None:
+        check_ispytest(_ispytest)
+        self._config: Optional[Config] = None
+        self._markers: Set[str] = set()
+
+    def __getattr__(self, name: str) -> MarkDecorator:
+        """Generate a new :class:`MarkDecorator` with the given name."""
+        if name[0] == "_":
+            raise AttributeError("Marker name must NOT start with underscore")
+
+        if self._config is not None:
+            # We store a set of markers as a performance optimisation - if a mark
+            # name is in the set we definitely know it, but a mark may be known and
+            # not in the set.  We therefore start by updating the set!
+            if name not in self._markers:
+                for line in self._config.getini("markers"):
+                    # example lines: "skipif(condition): skip the given test if..."
+                    # or "hypothesis: tests which use Hypothesis", so to get the
+                    # marker name we split on both `:` and `(`.
+                    if line == "ya:external":
+                        marker = line
+                    else:
+                        marker = line.split(":")[0].split("(")[0].strip()
+                    self._markers.add(marker)
+
+            # If the name is not in the set of known marks after updating,
+            # then it really is time to issue a warning or an error.
+            if name not in self._markers:
+                if self._config.option.strict_markers or self._config.option.strict:
+                    fail(
+                        f"{name!r} not found in `markers` configuration option",
+                        pytrace=False,
+                    )
+
+                # Raise a specific error for common misspellings of "parametrize".
+                if name in ["parameterize", "parametrise", "parameterise"]:
+                    __tracebackhide__ = True
+                    fail(f"Unknown '{name}' mark, did you mean 'parametrize'?")
+
+                warnings.warn(
+                    "Unknown pytest.mark.%s - is this a typo?  You can register "
+                    "custom marks to avoid this warning - for details, see "
+                    "https://docs.pytest.org/en/stable/how-to/mark.html" % name,
+                    PytestUnknownMarkWarning,
+                    2,
+                )
+
+        return MarkDecorator(Mark(name, (), {}, _ispytest=True), _ispytest=True)
+
+
+MARK_GEN = MarkGenerator(_ispytest=True)
+
+
+@final
+class NodeKeywords(MutableMapping[str, Any]):
+    __slots__ = ("node", "parent", "_markers")
+
+    def __init__(self, node: "Node") -> None:
+        self.node = node
+        self.parent = node.parent
+        self._markers = {node.name: True}
+
+    def __getitem__(self, key: str) -> Any:
+        try:
+            return self._markers[key]
+        except KeyError:
+            if self.parent is None:
+                raise
+            return self.parent.keywords[key]
+
+    def __setitem__(self, key: str, value: Any) -> None:
+        self._markers[key] = value
+
+    # Note: we could've avoided explicitly implementing some of the methods
+    # below and use the collections.abc fallback, but that would be slow.
+
+    def __contains__(self, key: object) -> bool:
+        return (
+            key in self._markers
+            or self.parent is not None
+            and key in self.parent.keywords
+        )
+
+    def update(  # type: ignore[override]
+        self,
+        other: Union[Mapping[str, Any], Iterable[Tuple[str, Any]]] = (),
+        **kwds: Any,
+    ) -> None:
+        self._markers.update(other)
+        self._markers.update(kwds)
+
+    def __delitem__(self, key: str) -> None:
+        raise ValueError("cannot delete key in keywords dict")
+
+    def __iter__(self) -> Iterator[str]:
+        # Doesn't need to be fast.
+        yield from self._markers
+        if self.parent is not None:
+            for keyword in self.parent.keywords:
+                # self._marks and self.parent.keywords can have duplicates.
+                if keyword not in self._markers:
+                    yield keyword
+
+    def __len__(self) -> int:
+        # Doesn't need to be fast.
+        return sum(1 for keyword in self)
+
+    def __repr__(self) -> str:
+        return f"<NodeKeywords for node {self.node}>"
diff --git a/contrib/python/pytest/py3/_pytest/monkeypatch.py b/contrib/python/pytest/py3/_pytest/monkeypatch.py
new file mode 100644
index 0000000000..9e51ff3353
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/monkeypatch.py
@@ -0,0 +1,421 @@
+"""Monkeypatching and mocking functionality."""
+import os
+import re
+import sys
+import warnings
+from contextlib import contextmanager
+from typing import Any
+from typing import Generator
+from typing import List
+from typing import Mapping
+from typing import MutableMapping
+from typing import Optional
+from typing import overload
+from typing import Tuple
+from typing import TypeVar
+from typing import Union
+
+from _pytest.compat import final
+from _pytest.fixtures import fixture
+from _pytest.warning_types import PytestWarning
+
+RE_IMPORT_ERROR_NAME = re.compile(r"^No module named (.*)$")
+
+
+K = TypeVar("K")
+V = TypeVar("V")
+
+
+@fixture
+def monkeypatch() -> Generator["MonkeyPatch", None, None]:
+    """A convenient fixture for monkey-patching.
+
+    The fixture provides these methods to modify objects, dictionaries, or
+    :data:`os.environ`:
+
+    * :meth:`monkeypatch.setattr(obj, name, value, raising=True) <pytest.MonkeyPatch.setattr>`
+    * :meth:`monkeypatch.delattr(obj, name, raising=True) <pytest.MonkeyPatch.delattr>`
+    * :meth:`monkeypatch.setitem(mapping, name, value) <pytest.MonkeyPatch.setitem>`
+    * :meth:`monkeypatch.delitem(obj, name, raising=True) <pytest.MonkeyPatch.delitem>`
+    * :meth:`monkeypatch.setenv(name, value, prepend=None) <pytest.MonkeyPatch.setenv>`
+    * :meth:`monkeypatch.delenv(name, raising=True) <pytest.MonkeyPatch.delenv>`
+    * :meth:`monkeypatch.syspath_prepend(path) <pytest.MonkeyPatch.syspath_prepend>`
+    * :meth:`monkeypatch.chdir(path) <pytest.MonkeyPatch.chdir>`
+    * :meth:`monkeypatch.context() <pytest.MonkeyPatch.context>`
+
+    All modifications will be undone after the requesting test function or
+    fixture has finished. The ``raising`` parameter determines if a :class:`KeyError`
+    or :class:`AttributeError` will be raised if the set/deletion operation does not have the
+    specified target.
+
+    To undo modifications done by the fixture in a contained scope,
+    use :meth:`context() <pytest.MonkeyPatch.context>`.
+    """
+    mpatch = MonkeyPatch()
+    yield mpatch
+    mpatch.undo()
+
+
+def resolve(name: str) -> object:
+    # Simplified from zope.dottedname.
+    parts = name.split(".")
+
+    used = parts.pop(0)
+    found: object = __import__(used)
+    for part in parts:
+        used += "." + part
+        try:
+            found = getattr(found, part)
+        except AttributeError:
+            pass
+        else:
+            continue
+        # We use explicit un-nesting of the handling block in order
+        # to avoid nested exceptions.
+        try:
+            __import__(used)
+        except ImportError as ex:
+            expected = str(ex).split()[-1]
+            if expected == used:
+                raise
+            else:
+                raise ImportError(f"import error in {used}: {ex}") from ex
+        found = annotated_getattr(found, part, used)
+    return found
+
+
+def annotated_getattr(obj: object, name: str, ann: str) -> object:
+    try:
+        obj = getattr(obj, name)
+    except AttributeError as e:
+        raise AttributeError(
+            "{!r} object at {} has no attribute {!r}".format(
+                type(obj).__name__, ann, name
+            )
+        ) from e
+    return obj
+
+
+def derive_importpath(import_path: str, raising: bool) -> Tuple[str, object]:
+    if not isinstance(import_path, str) or "." not in import_path:
+        raise TypeError(f"must be absolute import path string, not {import_path!r}")
+    module, attr = import_path.rsplit(".", 1)
+    target = resolve(module)
+    if raising:
+        annotated_getattr(target, attr, ann=module)
+    return attr, target
+
+
+class Notset:
+    def __repr__(self) -> str:
+        return "<notset>"
+
+
+notset = Notset()
+
+
+@final
+class MonkeyPatch:
+    """Helper to conveniently monkeypatch attributes/items/environment
+    variables/syspath.
+
+    Returned by the :fixture:`monkeypatch` fixture.
+
+    .. versionchanged:: 6.2
+        Can now also be used directly as `pytest.MonkeyPatch()`, for when
+        the fixture is not available. In this case, use
+        :meth:`with MonkeyPatch.context() as mp: <context>` or remember to call
+        :meth:`undo` explicitly.
+    """
+
+    def __init__(self) -> None:
+        self._setattr: List[Tuple[object, str, object]] = []
+        self._setitem: List[Tuple[Mapping[Any, Any], object, object]] = []
+        self._cwd: Optional[str] = None
+        self._savesyspath: Optional[List[str]] = None
+
+    @classmethod
+    @contextmanager
+    def context(cls) -> Generator["MonkeyPatch", None, None]:
+        """Context manager that returns a new :class:`MonkeyPatch` object
+        which undoes any patching done inside the ``with`` block upon exit.
+
+        Example:
+
+        .. code-block:: python
+
+            import functools
+
+
+            def test_partial(monkeypatch):
+                with monkeypatch.context() as m:
+                    m.setattr(functools, "partial", 3)
+
+        Useful in situations where it is desired to undo some patches before the test ends,
+        such as mocking ``stdlib`` functions that might break pytest itself if mocked (for examples
+        of this see :issue:`3290`).
+        """
+        m = cls()
+        try:
+            yield m
+        finally:
+            m.undo()
+
+    @overload
+    def setattr(
+        self,
+        target: str,
+        name: object,
+        value: Notset = ...,
+        raising: bool = ...,
+    ) -> None:
+        ...
+
+    @overload
+    def setattr(
+        self,
+        target: object,
+        name: str,
+        value: object,
+        raising: bool = ...,
+    ) -> None:
+        ...
+
+    def setattr(
+        self,
+        target: Union[str, object],
+        name: Union[object, str],
+        value: object = notset,
+        raising: bool = True,
+    ) -> None:
+        """
+        Set attribute value on target, memorizing the old value.
+
+        For example:
+
+        .. code-block:: python
+
+            import os
+
+            monkeypatch.setattr(os, "getcwd", lambda: "/")
+
+        The code above replaces the :func:`os.getcwd` function by a ``lambda`` which
+        always returns ``"/"``.
+
+        For convenience, you can specify a string as ``target`` which
+        will be interpreted as a dotted import path, with the last part
+        being the attribute name:
+
+        .. code-block:: python
+
+            monkeypatch.setattr("os.getcwd", lambda: "/")
+
+        Raises :class:`AttributeError` if the attribute does not exist, unless
+        ``raising`` is set to False.
+
+        **Where to patch**
+
+        ``monkeypatch.setattr`` works by (temporarily) changing the object that a name points to with another one.
+        There can be many names pointing to any individual object, so for patching to work you must ensure
+        that you patch the name used by the system under test.
+
+        See the section :ref:`Where to patch <python:where-to-patch>` in the :mod:`unittest.mock`
+        docs for a complete explanation, which is meant for :func:`unittest.mock.patch` but
+        applies to ``monkeypatch.setattr`` as well.
+        """
+        __tracebackhide__ = True
+        import inspect
+
+        if isinstance(value, Notset):
+            if not isinstance(target, str):
+                raise TypeError(
+                    "use setattr(target, name, value) or "
+                    "setattr(target, value) with target being a dotted "
+                    "import string"
+                )
+            value = name
+            name, target = derive_importpath(target, raising)
+        else:
+            if not isinstance(name, str):
+                raise TypeError(
+                    "use setattr(target, name, value) with name being a string or "
+                    "setattr(target, value) with target being a dotted "
+                    "import string"
+                )
+
+        oldval = getattr(target, name, notset)
+        if raising and oldval is notset:
+            raise AttributeError(f"{target!r} has no attribute {name!r}")
+
+        # avoid class descriptors like staticmethod/classmethod
+        if inspect.isclass(target):
+            oldval = target.__dict__.get(name, notset)
+        self._setattr.append((target, name, oldval))
+        setattr(target, name, value)
+
+    def delattr(
+        self,
+        target: Union[object, str],
+        name: Union[str, Notset] = notset,
+        raising: bool = True,
+    ) -> None:
+        """Delete attribute ``name`` from ``target``.
+
+        If no ``name`` is specified and ``target`` is a string
+        it will be interpreted as a dotted import path with the
+        last part being the attribute name.
+
+        Raises AttributeError it the attribute does not exist, unless
+        ``raising`` is set to False.
+        """
+        __tracebackhide__ = True
+        import inspect
+
+        if isinstance(name, Notset):
+            if not isinstance(target, str):
+                raise TypeError(
+                    "use delattr(target, name) or "
+                    "delattr(target) with target being a dotted "
+                    "import string"
+                )
+            name, target = derive_importpath(target, raising)
+
+        if not hasattr(target, name):
+            if raising:
+                raise AttributeError(name)
+        else:
+            oldval = getattr(target, name, notset)
+            # Avoid class descriptors like staticmethod/classmethod.
+            if inspect.isclass(target):
+                oldval = target.__dict__.get(name, notset)
+            self._setattr.append((target, name, oldval))
+            delattr(target, name)
+
+    def setitem(self, dic: Mapping[K, V], name: K, value: V) -> None:
+        """Set dictionary entry ``name`` to value."""
+        self._setitem.append((dic, name, dic.get(name, notset)))
+        # Not all Mapping types support indexing, but MutableMapping doesn't support TypedDict
+        dic[name] = value  # type: ignore[index]
+
+    def delitem(self, dic: Mapping[K, V], name: K, raising: bool = True) -> None:
+        """Delete ``name`` from dict.
+
+        Raises ``KeyError`` if it doesn't exist, unless ``raising`` is set to
+        False.
+        """
+        if name not in dic:
+            if raising:
+                raise KeyError(name)
+        else:
+            self._setitem.append((dic, name, dic.get(name, notset)))
+            # Not all Mapping types support indexing, but MutableMapping doesn't support TypedDict
+            del dic[name]  # type: ignore[attr-defined]
+
+    def setenv(self, name: str, value: str, prepend: Optional[str] = None) -> None:
+        """Set environment variable ``name`` to ``value``.
+
+        If ``prepend`` is a character, read the current environment variable
+        value and prepend the ``value`` adjoined with the ``prepend``
+        character.
+        """
+        if not isinstance(value, str):
+            warnings.warn(  # type: ignore[unreachable]
+                PytestWarning(
+                    "Value of environment variable {name} type should be str, but got "
+                    "{value!r} (type: {type}); converted to str implicitly".format(
+                        name=name, value=value, type=type(value).__name__
+                    )
+                ),
+                stacklevel=2,
+            )
+            value = str(value)
+        if prepend and name in os.environ:
+            value = value + prepend + os.environ[name]
+        self.setitem(os.environ, name, value)
+
+    def delenv(self, name: str, raising: bool = True) -> None:
+        """Delete ``name`` from the environment.
+
+        Raises ``KeyError`` if it does not exist, unless ``raising`` is set to
+        False.
+        """
+        environ: MutableMapping[str, str] = os.environ
+        self.delitem(environ, name, raising=raising)
+
+    def syspath_prepend(self, path) -> None:
+        """Prepend ``path`` to ``sys.path`` list of import locations."""
+
+        if self._savesyspath is None:
+            self._savesyspath = sys.path[:]
+        sys.path.insert(0, str(path))
+
+        # https://github.com/pypa/setuptools/blob/d8b901bc/docs/pkg_resources.txt#L162-L171
+        # this is only needed when pkg_resources was already loaded by the namespace package
+        if "pkg_resources" in sys.modules:
+            from pkg_resources import fixup_namespace_packages
+
+            fixup_namespace_packages(str(path))
+
+        # A call to syspathinsert() usually means that the caller wants to
+        # import some dynamically created files, thus with python3 we
+        # invalidate its import caches.
+        # This is especially important when any namespace package is in use,
+        # since then the mtime based FileFinder cache (that gets created in
+        # this case already) gets not invalidated when writing the new files
+        # quickly afterwards.
+        from importlib import invalidate_caches
+
+        invalidate_caches()
+
+    def chdir(self, path: Union[str, "os.PathLike[str]"]) -> None:
+        """Change the current working directory to the specified path.
+
+        :param path:
+            The path to change into.
+        """
+        if self._cwd is None:
+            self._cwd = os.getcwd()
+        os.chdir(path)
+
+    def undo(self) -> None:
+        """Undo previous changes.
+
+        This call consumes the undo stack. Calling it a second time has no
+        effect unless you do more monkeypatching after the undo call.
+
+        There is generally no need to call `undo()`, since it is
+        called automatically during tear-down.
+
+        .. note::
+            The same `monkeypatch` fixture is used across a
+            single test function invocation. If `monkeypatch` is used both by
+            the test function itself and one of the test fixtures,
+            calling `undo()` will undo all of the changes made in
+            both functions.
+
+            Prefer to use :meth:`context() <pytest.MonkeyPatch.context>` instead.
+        """
+        for obj, name, value in reversed(self._setattr):
+            if value is not notset:
+                setattr(obj, name, value)
+            else:
+                delattr(obj, name)
+        self._setattr[:] = []
+        for dictionary, key, value in reversed(self._setitem):
+            if value is notset:
+                try:
+                    # Not all Mapping types support indexing, but MutableMapping doesn't support TypedDict
+                    del dictionary[key]  # type: ignore[attr-defined]
+                except KeyError:
+                    pass  # Was already deleted, so we have the desired state.
+            else:
+                # Not all Mapping types support indexing, but MutableMapping doesn't support TypedDict
+                dictionary[key] = value  # type: ignore[index]
+        self._setitem[:] = []
+        if self._savesyspath is not None:
+            sys.path[:] = self._savesyspath
+            self._savesyspath = None
+
+        if self._cwd is not None:
+            os.chdir(self._cwd)
+            self._cwd = None
diff --git a/contrib/python/pytest/py3/_pytest/nodes.py b/contrib/python/pytest/py3/_pytest/nodes.py
new file mode 100644
index 0000000000..667a02b77a
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/nodes.py
@@ -0,0 +1,783 @@
+import os
+import warnings
+from inspect import signature
+from pathlib import Path
+from typing import Any
+from typing import Callable
+from typing import cast
+from typing import Iterable
+from typing import Iterator
+from typing import List
+from typing import MutableMapping
+from typing import Optional
+from typing import overload
+from typing import Set
+from typing import Tuple
+from typing import Type
+from typing import TYPE_CHECKING
+from typing import TypeVar
+from typing import Union
+
+import _pytest._code
+from _pytest._code import getfslineno
+from _pytest._code.code import ExceptionInfo
+from _pytest._code.code import TerminalRepr
+from _pytest._code.code import Traceback
+from _pytest.compat import cached_property
+from _pytest.compat import LEGACY_PATH
+from _pytest.config import Config
+from _pytest.config import ConftestImportFailure
+from _pytest.deprecated import FSCOLLECTOR_GETHOOKPROXY_ISINITPATH
+from _pytest.deprecated import NODE_CTOR_FSPATH_ARG
+from _pytest.mark.structures import Mark
+from _pytest.mark.structures import MarkDecorator
+from _pytest.mark.structures import NodeKeywords
+from _pytest.outcomes import fail
+from _pytest.pathlib import absolutepath
+from _pytest.pathlib import commonpath
+from _pytest.stash import Stash
+from _pytest.warning_types import PytestWarning
+
+if TYPE_CHECKING:
+    # Imported here due to circular import.
+    from _pytest.main import Session
+    from _pytest._code.code import _TracebackStyle
+
+
+SEP = "/"
+
+tracebackcutdir = Path(_pytest.__file__).parent
+
+
+def iterparentnodeids(nodeid: str) -> Iterator[str]:
+    """Return the parent node IDs of a given node ID, inclusive.
+
+    For the node ID
+
+        "testing/code/test_excinfo.py::TestFormattedExcinfo::test_repr_source"
+
+    the result would be
+
+        ""
+        "testing"
+        "testing/code"
+        "testing/code/test_excinfo.py"
+        "testing/code/test_excinfo.py::TestFormattedExcinfo"
+        "testing/code/test_excinfo.py::TestFormattedExcinfo::test_repr_source"
+
+    Note that / components are only considered until the first ::.
+    """
+    pos = 0
+    first_colons: Optional[int] = nodeid.find("::")
+    if first_colons == -1:
+        first_colons = None
+    # The root Session node - always present.
+    yield ""
+    # Eagerly consume SEP parts until first colons.
+    while True:
+        at = nodeid.find(SEP, pos, first_colons)
+        if at == -1:
+            break
+        if at > 0:
+            yield nodeid[:at]
+        pos = at + len(SEP)
+    # Eagerly consume :: parts.
+    while True:
+        at = nodeid.find("::", pos)
+        if at == -1:
+            break
+        if at > 0:
+            yield nodeid[:at]
+        pos = at + len("::")
+    # The node ID itself.
+    if nodeid:
+        yield nodeid
+
+
+def _check_path(path: Path, fspath: LEGACY_PATH) -> None:
+    if Path(fspath) != path:
+        raise ValueError(
+            f"Path({fspath!r}) != {path!r}\n"
+            "if both path and fspath are given they need to be equal"
+        )
+
+
+def _imply_path(
+    node_type: Type["Node"],
+    path: Optional[Path],
+    fspath: Optional[LEGACY_PATH],
+) -> Path:
+    if fspath is not None:
+        warnings.warn(
+            NODE_CTOR_FSPATH_ARG.format(
+                node_type_name=node_type.__name__,
+            ),
+            stacklevel=6,
+        )
+    if path is not None:
+        if fspath is not None:
+            _check_path(path, fspath)
+        return path
+    else:
+        assert fspath is not None
+        return Path(fspath)
+
+
+_NodeType = TypeVar("_NodeType", bound="Node")
+
+
+class NodeMeta(type):
+    def __call__(self, *k, **kw):
+        msg = (
+            "Direct construction of {name} has been deprecated, please use {name}.from_parent.\n"
+            "See "
+            "https://docs.pytest.org/en/stable/deprecations.html#node-construction-changed-to-node-from-parent"
+            " for more details."
+        ).format(name=f"{self.__module__}.{self.__name__}")
+        fail(msg, pytrace=False)
+
+    def _create(self, *k, **kw):
+        try:
+            return super().__call__(*k, **kw)
+        except TypeError:
+            sig = signature(getattr(self, "__init__"))
+            known_kw = {k: v for k, v in kw.items() if k in sig.parameters}
+            from .warning_types import PytestDeprecationWarning
+
+            warnings.warn(
+                PytestDeprecationWarning(
+                    f"{self} is not using a cooperative constructor and only takes {set(known_kw)}.\n"
+                    "See https://docs.pytest.org/en/stable/deprecations.html"
+                    "#constructors-of-custom-pytest-node-subclasses-should-take-kwargs "
+                    "for more details."
+                )
+            )
+
+            return super().__call__(*k, **known_kw)
+
+
+class Node(metaclass=NodeMeta):
+    r"""Base class of :class:`Collector` and :class:`Item`, the components of
+    the test collection tree.
+
+    ``Collector``\'s are the internal nodes of the tree, and ``Item``\'s are the
+    leaf nodes.
+    """
+
+    # Implemented in the legacypath plugin.
+    #: A ``LEGACY_PATH`` copy of the :attr:`path` attribute. Intended for usage
+    #: for methods not migrated to ``pathlib.Path`` yet, such as
+    #: :meth:`Item.reportinfo`. Will be deprecated in a future release, prefer
+    #: using :attr:`path` instead.
+    fspath: LEGACY_PATH
+
+    # Use __slots__ to make attribute access faster.
+    # Note that __dict__ is still available.
+    __slots__ = (
+        "name",
+        "parent",
+        "config",
+        "session",
+        "path",
+        "_nodeid",
+        "_store",
+        "__dict__",
+    )
+
+    def __init__(
+        self,
+        name: str,
+        parent: "Optional[Node]" = None,
+        config: Optional[Config] = None,
+        session: "Optional[Session]" = None,
+        fspath: Optional[LEGACY_PATH] = None,
+        path: Optional[Path] = None,
+        nodeid: Optional[str] = None,
+    ) -> None:
+        #: A unique name within the scope of the parent node.
+        self.name: str = name
+
+        #: The parent collector node.
+        self.parent = parent
+
+        if config:
+            #: The pytest config object.
+            self.config: Config = config
+        else:
+            if not parent:
+                raise TypeError("config or parent must be provided")
+            self.config = parent.config
+
+        if session:
+            #: The pytest session this node is part of.
+            self.session: Session = session
+        else:
+            if not parent:
+                raise TypeError("session or parent must be provided")
+            self.session = parent.session
+
+        if path is None and fspath is None:
+            path = getattr(parent, "path", None)
+        #: Filesystem path where this node was collected from (can be None).
+        self.path: Path = _imply_path(type(self), path, fspath=fspath)
+
+        # The explicit annotation is to avoid publicly exposing NodeKeywords.
+        #: Keywords/markers collected from all scopes.
+        self.keywords: MutableMapping[str, Any] = NodeKeywords(self)
+
+        #: The marker objects belonging to this node.
+        self.own_markers: List[Mark] = []
+
+        #: Allow adding of extra keywords to use for matching.
+        self.extra_keyword_matches: Set[str] = set()
+
+        if nodeid is not None:
+            assert "::()" not in nodeid
+            self._nodeid = nodeid
+        else:
+            if not self.parent:
+                raise TypeError("nodeid or parent must be provided")
+            self._nodeid = self.parent.nodeid + "::" + self.name
+
+        #: A place where plugins can store information on the node for their
+        #: own use.
+        self.stash: Stash = Stash()
+        # Deprecated alias. Was never public. Can be removed in a few releases.
+        self._store = self.stash
+
+    @classmethod
+    def from_parent(cls, parent: "Node", **kw):
+        """Public constructor for Nodes.
+
+        This indirection got introduced in order to enable removing
+        the fragile logic from the node constructors.
+
+        Subclasses can use ``super().from_parent(...)`` when overriding the
+        construction.
+
+        :param parent: The parent node of this Node.
+        """
+        if "config" in kw:
+            raise TypeError("config is not a valid argument for from_parent")
+        if "session" in kw:
+            raise TypeError("session is not a valid argument for from_parent")
+        return cls._create(parent=parent, **kw)
+
+    @property
+    def ihook(self):
+        """fspath-sensitive hook proxy used to call pytest hooks."""
+        return self.session.gethookproxy(self.path)
+
+    def __repr__(self) -> str:
+        return "<{} {}>".format(self.__class__.__name__, getattr(self, "name", None))
+
+    def warn(self, warning: Warning) -> None:
+        """Issue a warning for this Node.
+
+        Warnings will be displayed after the test session, unless explicitly suppressed.
+
+        :param Warning warning:
+            The warning instance to issue.
+
+        :raises ValueError: If ``warning`` instance is not a subclass of Warning.
+
+        Example usage:
+
+        .. code-block:: python
+
+            node.warn(PytestWarning("some message"))
+            node.warn(UserWarning("some message"))
+
+        .. versionchanged:: 6.2
+            Any subclass of :class:`Warning` is now accepted, rather than only
+            :class:`PytestWarning <pytest.PytestWarning>` subclasses.
+        """
+        # enforce type checks here to avoid getting a generic type error later otherwise.
+        if not isinstance(warning, Warning):
+            raise ValueError(
+                "warning must be an instance of Warning or subclass, got {!r}".format(
+                    warning
+                )
+            )
+        path, lineno = get_fslocation_from_item(self)
+        assert lineno is not None
+        warnings.warn_explicit(
+            warning,
+            category=None,
+            filename=str(path),
+            lineno=lineno + 1,
+        )
+
+    # Methods for ordering nodes.
+
+    @property
+    def nodeid(self) -> str:
+        """A ::-separated string denoting its collection tree address."""
+        return self._nodeid
+
+    def __hash__(self) -> int:
+        return hash(self._nodeid)
+
+    def setup(self) -> None:
+        pass
+
+    def teardown(self) -> None:
+        pass
+
+    def listchain(self) -> List["Node"]:
+        """Return list of all parent collectors up to self, starting from
+        the root of collection tree.
+
+        :returns: The nodes.
+        """
+        chain = []
+        item: Optional[Node] = self
+        while item is not None:
+            chain.append(item)
+            item = item.parent
+        chain.reverse()
+        return chain
+
+    def add_marker(
+        self, marker: Union[str, MarkDecorator], append: bool = True
+    ) -> None:
+        """Dynamically add a marker object to the node.
+
+        :param marker:
+            The marker.
+        :param append:
+            Whether to append the marker, or prepend it.
+        """
+        from _pytest.mark import MARK_GEN
+
+        if isinstance(marker, MarkDecorator):
+            marker_ = marker
+        elif isinstance(marker, str):
+            marker_ = getattr(MARK_GEN, marker)
+        else:
+            raise ValueError("is not a string or pytest.mark.* Marker")
+        self.keywords[marker_.name] = marker_
+        if append:
+            self.own_markers.append(marker_.mark)
+        else:
+            self.own_markers.insert(0, marker_.mark)
+
+    def iter_markers(self, name: Optional[str] = None) -> Iterator[Mark]:
+        """Iterate over all markers of the node.
+
+        :param name: If given, filter the results by the name attribute.
+        :returns: An iterator of the markers of the node.
+        """
+        return (x[1] for x in self.iter_markers_with_node(name=name))
+
+    def iter_markers_with_node(
+        self, name: Optional[str] = None
+    ) -> Iterator[Tuple["Node", Mark]]:
+        """Iterate over all markers of the node.
+
+        :param name: If given, filter the results by the name attribute.
+        :returns: An iterator of (node, mark) tuples.
+        """
+        for node in reversed(self.listchain()):
+            for mark in node.own_markers:
+                if name is None or getattr(mark, "name", None) == name:
+                    yield node, mark
+
+    @overload
+    def get_closest_marker(self, name: str) -> Optional[Mark]:
+        ...
+
+    @overload
+    def get_closest_marker(self, name: str, default: Mark) -> Mark:
+        ...
+
+    def get_closest_marker(
+        self, name: str, default: Optional[Mark] = None
+    ) -> Optional[Mark]:
+        """Return the first marker matching the name, from closest (for
+        example function) to farther level (for example module level).
+
+        :param default: Fallback return value if no marker was found.
+        :param name: Name to filter by.
+        """
+        return next(self.iter_markers(name=name), default)
+
+    def listextrakeywords(self) -> Set[str]:
+        """Return a set of all extra keywords in self and any parents."""
+        extra_keywords: Set[str] = set()
+        for item in self.listchain():
+            extra_keywords.update(item.extra_keyword_matches)
+        return extra_keywords
+
+    def listnames(self) -> List[str]:
+        return [x.name for x in self.listchain()]
+
+    def addfinalizer(self, fin: Callable[[], object]) -> None:
+        """Register a function to be called without arguments when this node is
+        finalized.
+
+        This method can only be called when this node is active
+        in a setup chain, for example during self.setup().
+        """
+        self.session._setupstate.addfinalizer(fin, self)
+
+    def getparent(self, cls: Type[_NodeType]) -> Optional[_NodeType]:
+        """Get the next parent node (including self) which is an instance of
+        the given class.
+
+        :param cls: The node class to search for.
+        :returns: The node, if found.
+        """
+        current: Optional[Node] = self
+        while current and not isinstance(current, cls):
+            current = current.parent
+        assert current is None or isinstance(current, cls)
+        return current
+
+    def _traceback_filter(self, excinfo: ExceptionInfo[BaseException]) -> Traceback:
+        return excinfo.traceback
+
+    def _repr_failure_py(
+        self,
+        excinfo: ExceptionInfo[BaseException],
+        style: "Optional[_TracebackStyle]" = None,
+    ) -> TerminalRepr:
+        from _pytest.fixtures import FixtureLookupError
+
+        if isinstance(excinfo.value, ConftestImportFailure):
+            excinfo = ExceptionInfo.from_exc_info(excinfo.value.excinfo)
+        if isinstance(excinfo.value, fail.Exception):
+            if not excinfo.value.pytrace:
+                style = "value"
+        if isinstance(excinfo.value, FixtureLookupError):
+            return excinfo.value.formatrepr()
+
+        tbfilter: Union[bool, Callable[[ExceptionInfo[BaseException]], Traceback]]
+        if self.config.getoption("fulltrace", False):
+            style = "long"
+            tbfilter = False
+        else:
+            tbfilter = self._traceback_filter
+            if style == "auto":
+                style = "long"
+        # XXX should excinfo.getrepr record all data and toterminal() process it?
+        if style is None:
+            if self.config.getoption("tbstyle", "auto") == "short":
+                style = "short"
+            else:
+                style = "long"
+
+        if self.config.getoption("verbose", 0) > 1:
+            truncate_locals = False
+        else:
+            truncate_locals = True
+
+        # excinfo.getrepr() formats paths relative to the CWD if `abspath` is False.
+        # It is possible for a fixture/test to change the CWD while this code runs, which
+        # would then result in the user seeing confusing paths in the failure message.
+        # To fix this, if the CWD changed, always display the full absolute path.
+        # It will be better to just always display paths relative to invocation_dir, but
+        # this requires a lot of plumbing (#6428).
+        try:
+            abspath = Path(os.getcwd()) != self.config.invocation_params.dir
+        except OSError:
+            abspath = True
+
+        return excinfo.getrepr(
+            funcargs=True,
+            abspath=abspath,
+            showlocals=self.config.getoption("showlocals", False),
+            style=style,
+            tbfilter=tbfilter,
+            truncate_locals=truncate_locals,
+        )
+
+    def repr_failure(
+        self,
+        excinfo: ExceptionInfo[BaseException],
+        style: "Optional[_TracebackStyle]" = None,
+    ) -> Union[str, TerminalRepr]:
+        """Return a representation of a collection or test failure.
+
+        .. seealso:: :ref:`non-python tests`
+
+        :param excinfo: Exception information for the failure.
+        """
+        return self._repr_failure_py(excinfo, style)
+
+
+def get_fslocation_from_item(node: "Node") -> Tuple[Union[str, Path], Optional[int]]:
+    """Try to extract the actual location from a node, depending on available attributes:
+
+    * "location": a pair (path, lineno)
+    * "obj": a Python object that the node wraps.
+    * "fspath": just a path
+
+    :rtype: A tuple of (str|Path, int) with filename and 0-based line number.
+    """
+    # See Item.location.
+    location: Optional[Tuple[str, Optional[int], str]] = getattr(node, "location", None)
+    if location is not None:
+        return location[:2]
+    obj = getattr(node, "obj", None)
+    if obj is not None:
+        return getfslineno(obj)
+    return getattr(node, "fspath", "unknown location"), -1
+
+
+class Collector(Node):
+    """Base class of all collectors.
+
+    Collector create children through `collect()` and thus iteratively build
+    the collection tree.
+    """
+
+    class CollectError(Exception):
+        """An error during collection, contains a custom message."""
+
+    def collect(self) -> Iterable[Union["Item", "Collector"]]:
+        """Collect children (items and collectors) for this collector."""
+        raise NotImplementedError("abstract")
+
+    # TODO: This omits the style= parameter which breaks Liskov Substitution.
+    def repr_failure(  # type: ignore[override]
+        self, excinfo: ExceptionInfo[BaseException]
+    ) -> Union[str, TerminalRepr]:
+        """Return a representation of a collection failure.
+
+        :param excinfo: Exception information for the failure.
+        """
+        if isinstance(excinfo.value, self.CollectError) and not self.config.getoption(
+            "fulltrace", False
+        ):
+            exc = excinfo.value
+            return str(exc.args[0])
+
+        # Respect explicit tbstyle option, but default to "short"
+        # (_repr_failure_py uses "long" with "fulltrace" option always).
+        tbstyle = self.config.getoption("tbstyle", "auto")
+        if tbstyle == "auto":
+            tbstyle = "short"
+
+        return self._repr_failure_py(excinfo, style=tbstyle)
+
+    def _traceback_filter(self, excinfo: ExceptionInfo[BaseException]) -> Traceback:
+        if hasattr(self, "path"):
+            traceback = excinfo.traceback
+            ntraceback = traceback.cut(path=self.path)
+            if ntraceback == traceback:
+                ntraceback = ntraceback.cut(excludepath=tracebackcutdir)
+            return excinfo.traceback.filter(excinfo)
+        return excinfo.traceback
+
+
+def _check_initialpaths_for_relpath(session: "Session", path: Path) -> Optional[str]:
+    for initial_path in session._initialpaths:
+        if commonpath(path, initial_path) == initial_path:
+            rel = str(path.relative_to(initial_path))
+            return "" if rel == "." else rel
+    return None
+
+
+class FSCollector(Collector):
+    """Base class for filesystem collectors."""
+
+    def __init__(
+        self,
+        fspath: Optional[LEGACY_PATH] = None,
+        path_or_parent: Optional[Union[Path, Node]] = None,
+        path: Optional[Path] = None,
+        name: Optional[str] = None,
+        parent: Optional[Node] = None,
+        config: Optional[Config] = None,
+        session: Optional["Session"] = None,
+        nodeid: Optional[str] = None,
+    ) -> None:
+        if path_or_parent:
+            if isinstance(path_or_parent, Node):
+                assert parent is None
+                parent = cast(FSCollector, path_or_parent)
+            elif isinstance(path_or_parent, Path):
+                assert path is None
+                path = path_or_parent
+
+        path = _imply_path(type(self), path, fspath=fspath)
+        if name is None:
+            name = path.name
+            if parent is not None and parent.path != path:
+                try:
+                    rel = path.relative_to(parent.path)
+                except ValueError:
+                    pass
+                else:
+                    name = str(rel)
+                name = name.replace(os.sep, SEP)
+        self.path = path
+
+        if session is None:
+            assert parent is not None
+            session = parent.session
+
+        if nodeid is None:
+            try:
+                nodeid = str(self.path.relative_to(session.config.rootpath))
+            except ValueError:
+                nodeid = _check_initialpaths_for_relpath(session, path)
+
+            if nodeid and os.sep != SEP:
+                nodeid = nodeid.replace(os.sep, SEP)
+
+        super().__init__(
+            name=name,
+            parent=parent,
+            config=config,
+            session=session,
+            nodeid=nodeid,
+            path=path,
+        )
+
+    @classmethod
+    def from_parent(
+        cls,
+        parent,
+        *,
+        fspath: Optional[LEGACY_PATH] = None,
+        path: Optional[Path] = None,
+        **kw,
+    ):
+        """The public constructor."""
+        return super().from_parent(parent=parent, fspath=fspath, path=path, **kw)
+
+    def gethookproxy(self, fspath: "os.PathLike[str]"):
+        warnings.warn(FSCOLLECTOR_GETHOOKPROXY_ISINITPATH, stacklevel=2)
+        return self.session.gethookproxy(fspath)
+
+    def isinitpath(self, path: Union[str, "os.PathLike[str]"]) -> bool:
+        warnings.warn(FSCOLLECTOR_GETHOOKPROXY_ISINITPATH, stacklevel=2)
+        return self.session.isinitpath(path)
+
+
+class File(FSCollector):
+    """Base class for collecting tests from a file.
+
+    :ref:`non-python tests`.
+    """
+
+
+class Item(Node):
+    """Base class of all test invocation items.
+
+    Note that for a single function there might be multiple test invocation items.
+    """
+
+    nextitem = None
+
+    def __init__(
+        self,
+        name,
+        parent=None,
+        config: Optional[Config] = None,
+        session: Optional["Session"] = None,
+        nodeid: Optional[str] = None,
+        **kw,
+    ) -> None:
+        # The first two arguments are intentionally passed positionally,
+        # to keep plugins who define a node type which inherits from
+        # (pytest.Item, pytest.File) working (see issue #8435).
+        # They can be made kwargs when the deprecation above is done.
+        super().__init__(
+            name,
+            parent,
+            config=config,
+            session=session,
+            nodeid=nodeid,
+            **kw,
+        )
+        self._report_sections: List[Tuple[str, str, str]] = []
+
+        #: A list of tuples (name, value) that holds user defined properties
+        #: for this test.
+        self.user_properties: List[Tuple[str, object]] = []
+
+        self._check_item_and_collector_diamond_inheritance()
+
+    def _check_item_and_collector_diamond_inheritance(self) -> None:
+        """
+        Check if the current type inherits from both File and Collector
+        at the same time, emitting a warning accordingly (#8447).
+        """
+        cls = type(self)
+
+        # We inject an attribute in the type to avoid issuing this warning
+        # for the same class more than once, which is not helpful.
+        # It is a hack, but was deemed acceptable in order to avoid
+        # flooding the user in the common case.
+        attr_name = "_pytest_diamond_inheritance_warning_shown"
+        if getattr(cls, attr_name, False):
+            return
+        setattr(cls, attr_name, True)
+
+        problems = ", ".join(
+            base.__name__ for base in cls.__bases__ if issubclass(base, Collector)
+        )
+        if problems:
+            warnings.warn(
+                f"{cls.__name__} is an Item subclass and should not be a collector, "
+                f"however its bases {problems} are collectors.\n"
+                "Please split the Collectors and the Item into separate node types.\n"
+                "Pytest Doc example: https://docs.pytest.org/en/latest/example/nonpython.html\n"
+                "example pull request on a plugin: https://github.com/asmeurer/pytest-flakes/pull/40/",
+                PytestWarning,
+            )
+
+    def runtest(self) -> None:
+        """Run the test case for this item.
+
+        Must be implemented by subclasses.
+
+        .. seealso:: :ref:`non-python tests`
+        """
+        raise NotImplementedError("runtest must be implemented by Item subclass")
+
+    def add_report_section(self, when: str, key: str, content: str) -> None:
+        """Add a new report section, similar to what's done internally to add
+        stdout and stderr captured output::
+
+            item.add_report_section("call", "stdout", "report section contents")
+
+        :param str when:
+            One of the possible capture states, ``"setup"``, ``"call"``, ``"teardown"``.
+        :param str key:
+            Name of the section, can be customized at will. Pytest uses ``"stdout"`` and
+            ``"stderr"`` internally.
+        :param str content:
+            The full contents as a string.
+        """
+        if content:
+            self._report_sections.append((when, key, content))
+
+    def reportinfo(self) -> Tuple[Union["os.PathLike[str]", str], Optional[int], str]:
+        """Get location information for this item for test reports.
+
+        Returns a tuple with three elements:
+
+        - The path of the test (default ``self.path``)
+        - The 0-based line number of the test (default ``None``)
+        - A name of the test to be shown (default ``""``)
+
+        .. seealso:: :ref:`non-python tests`
+        """
+        return self.path, None, ""
+
+    @cached_property
+    def location(self) -> Tuple[str, Optional[int], str]:
+        """
+        Returns a tuple of ``(relfspath, lineno, testname)`` for this item
+        where ``relfspath`` is file path relative to ``config.rootpath``
+        and lineno is a 0-based line number.
+        """
+        location = self.reportinfo()
+        path = absolutepath(os.fspath(location[0]))
+        relfspath = self.session._node_location_to_relpath(path)
+        assert type(location[2]) is str
+        return (relfspath, location[1], location[2])
diff --git a/contrib/python/pytest/py3/_pytest/nose.py b/contrib/python/pytest/py3/_pytest/nose.py
new file mode 100644
index 0000000000..273bd045fb
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/nose.py
@@ -0,0 +1,50 @@
+"""Run testsuites written for nose."""
+import warnings
+
+from _pytest.config import hookimpl
+from _pytest.deprecated import NOSE_SUPPORT
+from _pytest.fixtures import getfixturemarker
+from _pytest.nodes import Item
+from _pytest.python import Function
+from _pytest.unittest import TestCaseFunction
+
+
+@hookimpl(trylast=True)
+def pytest_runtest_setup(item: Item) -> None:
+    if not isinstance(item, Function):
+        return
+    # Don't do nose style setup/teardown on direct unittest style classes.
+    if isinstance(item, TestCaseFunction):
+        return
+
+    # Capture the narrowed type of item for the teardown closure,
+    # see https://github.com/python/mypy/issues/2608
+    func = item
+
+    call_optional(func.obj, "setup", func.nodeid)
+    func.addfinalizer(lambda: call_optional(func.obj, "teardown", func.nodeid))
+
+    # NOTE: Module- and class-level fixtures are handled in python.py
+    # with `pluginmanager.has_plugin("nose")` checks.
+    # It would have been nicer to implement them outside of core, but
+    # it's not straightforward.
+
+
+def call_optional(obj: object, name: str, nodeid: str) -> bool:
+    method = getattr(obj, name, None)
+    if method is None:
+        return False
+    is_fixture = getfixturemarker(method) is not None
+    if is_fixture:
+        return False
+    if not callable(method):
+        return False
+    # Warn about deprecation of this plugin.
+    method_name = getattr(method, "__name__", str(method))
+    warnings.warn(
+        NOSE_SUPPORT.format(nodeid=nodeid, method=method_name, stage=name), stacklevel=2
+    )
+    # If there are any problems allow the exception to raise rather than
+    # silently ignoring it.
+    method()
+    return True
diff --git a/contrib/python/pytest/py3/_pytest/outcomes.py b/contrib/python/pytest/py3/_pytest/outcomes.py
new file mode 100644
index 0000000000..1be97dda4e
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/outcomes.py
@@ -0,0 +1,311 @@
+"""Exception classes and constants handling test outcomes as well as
+functions creating them."""
+import sys
+import warnings
+from typing import Any
+from typing import Callable
+from typing import cast
+from typing import NoReturn
+from typing import Optional
+from typing import Type
+from typing import TypeVar
+
+from _pytest.deprecated import KEYWORD_MSG_ARG
+
+TYPE_CHECKING = False  # Avoid circular import through compat.
+
+if TYPE_CHECKING:
+    from typing_extensions import Protocol
+else:
+    # typing.Protocol is only available starting from Python 3.8. It is also
+    # available from typing_extensions, but we don't want a runtime dependency
+    # on that. So use a dummy runtime implementation.
+    from typing import Generic
+
+    Protocol = Generic
+
+
+class OutcomeException(BaseException):
+    """OutcomeException and its subclass instances indicate and contain info
+    about test and collection outcomes."""
+
+    def __init__(self, msg: Optional[str] = None, pytrace: bool = True) -> None:
+        if msg is not None and not isinstance(msg, str):
+            error_msg = (  # type: ignore[unreachable]
+                "{} expected string as 'msg' parameter, got '{}' instead.\n"
+                "Perhaps you meant to use a mark?"
+            )
+            raise TypeError(error_msg.format(type(self).__name__, type(msg).__name__))
+        super().__init__(msg)
+        self.msg = msg
+        self.pytrace = pytrace
+
+    def __repr__(self) -> str:
+        if self.msg is not None:
+            return self.msg
+        return f"<{self.__class__.__name__} instance>"
+
+    __str__ = __repr__
+
+
+TEST_OUTCOME = (OutcomeException, Exception)
+
+
+class Skipped(OutcomeException):
+    # XXX hackish: on 3k we fake to live in the builtins
+    # in order to have Skipped exception printing shorter/nicer
+    __module__ = "builtins"
+
+    def __init__(
+        self,
+        msg: Optional[str] = None,
+        pytrace: bool = True,
+        allow_module_level: bool = False,
+        *,
+        _use_item_location: bool = False,
+    ) -> None:
+        super().__init__(msg=msg, pytrace=pytrace)
+        self.allow_module_level = allow_module_level
+        # If true, the skip location is reported as the item's location,
+        # instead of the place that raises the exception/calls skip().
+        self._use_item_location = _use_item_location
+
+
+class Failed(OutcomeException):
+    """Raised from an explicit call to pytest.fail()."""
+
+    __module__ = "builtins"
+
+
+class Exit(Exception):
+    """Raised for immediate program exits (no tracebacks/summaries)."""
+
+    def __init__(
+        self, msg: str = "unknown reason", returncode: Optional[int] = None
+    ) -> None:
+        self.msg = msg
+        self.returncode = returncode
+        super().__init__(msg)
+
+
+# Elaborate hack to work around https://github.com/python/mypy/issues/2087.
+# Ideally would just be `exit.Exception = Exit` etc.
+
+_F = TypeVar("_F", bound=Callable[..., object])
+_ET = TypeVar("_ET", bound=Type[BaseException])
+
+
+class _WithException(Protocol[_F, _ET]):
+    Exception: _ET
+    __call__: _F
+
+
+def _with_exception(exception_type: _ET) -> Callable[[_F], _WithException[_F, _ET]]:
+    def decorate(func: _F) -> _WithException[_F, _ET]:
+        func_with_exception = cast(_WithException[_F, _ET], func)
+        func_with_exception.Exception = exception_type
+        return func_with_exception
+
+    return decorate
+
+
+# Exposed helper methods.
+
+
+@_with_exception(Exit)
+def exit(
+    reason: str = "", returncode: Optional[int] = None, *, msg: Optional[str] = None
+) -> NoReturn:
+    """Exit testing process.
+
+    :param reason:
+        The message to show as the reason for exiting pytest.  reason has a default value
+        only because `msg` is deprecated.
+
+    :param returncode:
+        Return code to be used when exiting pytest.
+
+    :param msg:
+        Same as ``reason``, but deprecated. Will be removed in a future version, use ``reason`` instead.
+    """
+    __tracebackhide__ = True
+    from _pytest.config import UsageError
+
+    if reason and msg:
+        raise UsageError(
+            "cannot pass reason and msg to exit(), `msg` is deprecated, use `reason`."
+        )
+    if not reason:
+        if msg is None:
+            raise UsageError("exit() requires a reason argument")
+        warnings.warn(KEYWORD_MSG_ARG.format(func="exit"), stacklevel=2)
+        reason = msg
+    raise Exit(reason, returncode)
+
+
+@_with_exception(Skipped)
+def skip(
+    reason: str = "", *, allow_module_level: bool = False, msg: Optional[str] = None
+) -> NoReturn:
+    """Skip an executing test with the given message.
+
+    This function should be called only during testing (setup, call or teardown) or
+    during collection by using the ``allow_module_level`` flag.  This function can
+    be called in doctests as well.
+
+    :param reason:
+        The message to show the user as reason for the skip.
+
+    :param allow_module_level:
+        Allows this function to be called at module level.
+        Raising the skip exception at module level will stop
+        the execution of the module and prevent the collection of all tests in the module,
+        even those defined before the `skip` call.
+
+        Defaults to False.
+
+    :param msg:
+        Same as ``reason``, but deprecated. Will be removed in a future version, use ``reason`` instead.
+
+    .. note::
+        It is better to use the :ref:`pytest.mark.skipif ref` marker when
+        possible to declare a test to be skipped under certain conditions
+        like mismatching platforms or dependencies.
+        Similarly, use the ``# doctest: +SKIP`` directive (see :py:data:`doctest.SKIP`)
+        to skip a doctest statically.
+    """
+    __tracebackhide__ = True
+    reason = _resolve_msg_to_reason("skip", reason, msg)
+    raise Skipped(msg=reason, allow_module_level=allow_module_level)
+
+
+@_with_exception(Failed)
+def fail(reason: str = "", pytrace: bool = True, msg: Optional[str] = None) -> NoReturn:
+    """Explicitly fail an executing test with the given message.
+
+    :param reason:
+        The message to show the user as reason for the failure.
+
+    :param pytrace:
+        If False, msg represents the full failure information and no
+        python traceback will be reported.
+
+    :param msg:
+        Same as ``reason``, but deprecated. Will be removed in a future version, use ``reason`` instead.
+    """
+    __tracebackhide__ = True
+    reason = _resolve_msg_to_reason("fail", reason, msg)
+    raise Failed(msg=reason, pytrace=pytrace)
+
+
+def _resolve_msg_to_reason(
+    func_name: str, reason: str, msg: Optional[str] = None
+) -> str:
+    """
+    Handles converting the deprecated msg parameter if provided into
+    reason, raising a deprecation warning.  This function will be removed
+    when the optional msg argument is removed from here in future.
+
+    :param str func_name:
+        The name of the offending function, this is formatted into the deprecation message.
+
+    :param str reason:
+        The reason= passed into either pytest.fail() or pytest.skip()
+
+    :param str msg:
+        The msg= passed into either pytest.fail() or pytest.skip().  This will
+        be converted into reason if it is provided to allow pytest.skip(msg=) or
+        pytest.fail(msg=) to continue working in the interim period.
+
+    :returns:
+        The value to use as reason.
+
+    """
+    __tracebackhide__ = True
+    if msg is not None:
+        if reason:
+            from pytest import UsageError
+
+            raise UsageError(
+                f"Passing both ``reason`` and ``msg`` to pytest.{func_name}(...) is not permitted."
+            )
+        warnings.warn(KEYWORD_MSG_ARG.format(func=func_name), stacklevel=3)
+        reason = msg
+    return reason
+
+
+class XFailed(Failed):
+    """Raised from an explicit call to pytest.xfail()."""
+
+
+@_with_exception(XFailed)
+def xfail(reason: str = "") -> NoReturn:
+    """Imperatively xfail an executing test or setup function with the given reason.
+
+    This function should be called only during testing (setup, call or teardown).
+
+    :param reason:
+        The message to show the user as reason for the xfail.
+
+    .. note::
+        It is better to use the :ref:`pytest.mark.xfail ref` marker when
+        possible to declare a test to be xfailed under certain conditions
+        like known bugs or missing features.
+    """
+    __tracebackhide__ = True
+    raise XFailed(reason)
+
+
+def importorskip(
+    modname: str, minversion: Optional[str] = None, reason: Optional[str] = None
+) -> Any:
+    """Import and return the requested module ``modname``, or skip the
+    current test if the module cannot be imported.
+
+    :param modname:
+        The name of the module to import.
+    :param minversion:
+        If given, the imported module's ``__version__`` attribute must be at
+        least this minimal version, otherwise the test is still skipped.
+    :param reason:
+        If given, this reason is shown as the message when the module cannot
+        be imported.
+
+    :returns:
+        The imported module. This should be assigned to its canonical name.
+
+    Example::
+
+        docutils = pytest.importorskip("docutils")
+    """
+    import warnings
+
+    __tracebackhide__ = True
+    compile(modname, "", "eval")  # to catch syntaxerrors
+
+    with warnings.catch_warnings():
+        # Make sure to ignore ImportWarnings that might happen because
+        # of existing directories with the same name we're trying to
+        # import but without a __init__.py file.
+        warnings.simplefilter("ignore")
+        try:
+            __import__(modname)
+        except ImportError as exc:
+            if reason is None:
+                reason = f"could not import {modname!r}: {exc}"
+            raise Skipped(reason, allow_module_level=True) from None
+    mod = sys.modules[modname]
+    if minversion is None:
+        return mod
+    verattr = getattr(mod, "__version__", None)
+    if minversion is not None:
+        # Imported lazily to improve start-up time.
+        from packaging.version import Version
+
+        if verattr is None or Version(verattr) < Version(minversion):
+            raise Skipped(
+                "module %r has __version__ %r, required is: %r"
+                % (modname, verattr, minversion),
+                allow_module_level=True,
+            )
+    return mod
diff --git a/contrib/python/pytest/py3/_pytest/pastebin.py b/contrib/python/pytest/py3/_pytest/pastebin.py
new file mode 100644
index 0000000000..22c7a62237
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/pastebin.py
@@ -0,0 +1,110 @@
+"""Submit failure or test session information to a pastebin service."""
+import tempfile
+from io import StringIO
+from typing import IO
+from typing import Union
+
+import pytest
+from _pytest.config import Config
+from _pytest.config import create_terminal_writer
+from _pytest.config.argparsing import Parser
+from _pytest.stash import StashKey
+from _pytest.terminal import TerminalReporter
+
+
+pastebinfile_key = StashKey[IO[bytes]]()
+
+
+def pytest_addoption(parser: Parser) -> None:
+    group = parser.getgroup("terminal reporting")
+    group._addoption(
+        "--pastebin",
+        metavar="mode",
+        action="store",
+        dest="pastebin",
+        default=None,
+        choices=["failed", "all"],
+        help="Send failed|all info to bpaste.net pastebin service",
+    )
+
+
+@pytest.hookimpl(trylast=True)
+def pytest_configure(config: Config) -> None:
+    if config.option.pastebin == "all":
+        tr = config.pluginmanager.getplugin("terminalreporter")
+        # If no terminal reporter plugin is present, nothing we can do here;
+        # this can happen when this function executes in a worker node
+        # when using pytest-xdist, for example.
+        if tr is not None:
+            # pastebin file will be UTF-8 encoded binary file.
+            config.stash[pastebinfile_key] = tempfile.TemporaryFile("w+b")
+            oldwrite = tr._tw.write
+
+            def tee_write(s, **kwargs):
+                oldwrite(s, **kwargs)
+                if isinstance(s, str):
+                    s = s.encode("utf-8")
+                config.stash[pastebinfile_key].write(s)
+
+            tr._tw.write = tee_write
+
+
+def pytest_unconfigure(config: Config) -> None:
+    if pastebinfile_key in config.stash:
+        pastebinfile = config.stash[pastebinfile_key]
+        # Get terminal contents and delete file.
+        pastebinfile.seek(0)
+        sessionlog = pastebinfile.read()
+        pastebinfile.close()
+        del config.stash[pastebinfile_key]
+        # Undo our patching in the terminal reporter.
+        tr = config.pluginmanager.getplugin("terminalreporter")
+        del tr._tw.__dict__["write"]
+        # Write summary.
+        tr.write_sep("=", "Sending information to Paste Service")
+        pastebinurl = create_new_paste(sessionlog)
+        tr.write_line("pastebin session-log: %s\n" % pastebinurl)
+
+
+def create_new_paste(contents: Union[str, bytes]) -> str:
+    """Create a new paste using the bpaste.net service.
+
+    :contents: Paste contents string.
+    :returns: URL to the pasted contents, or an error message.
+    """
+    import re
+    from urllib.request import urlopen
+    from urllib.parse import urlencode
+
+    params = {"code": contents, "lexer": "text", "expiry": "1week"}
+    url = "https://bpa.st"
+    try:
+        response: str = (
+            urlopen(url, data=urlencode(params).encode("ascii")).read().decode("utf-8")
+        )
+    except OSError as exc_info:  # urllib errors
+        return "bad response: %s" % exc_info
+    m = re.search(r'href="/raw/(\w+)"', response)
+    if m:
+        return f"{url}/show/{m.group(1)}"
+    else:
+        return "bad response: invalid format ('" + response + "')"
+
+
+def pytest_terminal_summary(terminalreporter: TerminalReporter) -> None:
+    if terminalreporter.config.option.pastebin != "failed":
+        return
+    if "failed" in terminalreporter.stats:
+        terminalreporter.write_sep("=", "Sending information to Paste Service")
+        for rep in terminalreporter.stats["failed"]:
+            try:
+                msg = rep.longrepr.reprtraceback.reprentries[-1].reprfileloc
+            except AttributeError:
+                msg = terminalreporter._getfailureheadline(rep)
+            file = StringIO()
+            tw = create_terminal_writer(terminalreporter.config, file)
+            rep.toterminal(tw)
+            s = file.getvalue()
+            assert len(s)
+            pastebinurl = create_new_paste(s)
+            terminalreporter.write_line(f"{msg} --> {pastebinurl}")
diff --git a/contrib/python/pytest/py3/_pytest/pathlib.py b/contrib/python/pytest/py3/_pytest/pathlib.py
new file mode 100644
index 0000000000..5c765c6834
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/pathlib.py
@@ -0,0 +1,803 @@
+import atexit
+import contextlib
+import fnmatch
+import importlib.util
+import itertools
+import os
+import shutil
+import sys
+import types
+import uuid
+import warnings
+from enum import Enum
+from errno import EBADF
+from errno import ELOOP
+from errno import ENOENT
+from errno import ENOTDIR
+from functools import partial
+from os.path import expanduser
+from os.path import expandvars
+from os.path import isabs
+from os.path import sep
+from pathlib import Path
+from pathlib import PurePath
+from posixpath import sep as posix_sep
+from types import ModuleType
+from typing import Callable
+from typing import Dict
+from typing import Iterable
+from typing import Iterator
+from typing import List
+from typing import Optional
+from typing import Set
+from typing import Tuple
+from typing import Type
+from typing import TypeVar
+from typing import Union
+
+from _pytest.compat import assert_never
+from _pytest.outcomes import skip
+from _pytest.warning_types import PytestWarning
+
+LOCK_TIMEOUT = 60 * 60 * 24 * 3
+
+
+_AnyPurePath = TypeVar("_AnyPurePath", bound=PurePath)
+
+# The following function, variables and comments were
+# copied from cpython 3.9 Lib/pathlib.py file.
+
+# EBADF - guard against macOS `stat` throwing EBADF
+_IGNORED_ERRORS = (ENOENT, ENOTDIR, EBADF, ELOOP)
+
+_IGNORED_WINERRORS = (
+    21,  # ERROR_NOT_READY - drive exists but is not accessible
+    1921,  # ERROR_CANT_RESOLVE_FILENAME - fix for broken symlink pointing to itself
+)
+
+
+def _ignore_error(exception):
+    return (
+        getattr(exception, "errno", None) in _IGNORED_ERRORS
+        or getattr(exception, "winerror", None) in _IGNORED_WINERRORS
+    )
+
+
+def get_lock_path(path: _AnyPurePath) -> _AnyPurePath:
+    return path.joinpath(".lock")
+
+
+def on_rm_rf_error(
+    func,
+    path: str,
+    excinfo: Union[
+        BaseException,
+        Tuple[Type[BaseException], BaseException, Optional[types.TracebackType]],
+    ],
+    *,
+    start_path: Path,
+) -> bool:
+    """Handle known read-only errors during rmtree.
+
+    The returned value is used only by our own tests.
+    """
+    if isinstance(excinfo, BaseException):
+        exc = excinfo
+    else:
+        exc = excinfo[1]
+
+    # Another process removed the file in the middle of the "rm_rf" (xdist for example).
+    # More context: https://github.com/pytest-dev/pytest/issues/5974#issuecomment-543799018
+    if isinstance(exc, FileNotFoundError):
+        return False
+
+    if not isinstance(exc, PermissionError):
+        warnings.warn(
+            PytestWarning(f"(rm_rf) error removing {path}\n{type(exc)}: {exc}")
+        )
+        return False
+
+    if func not in (os.rmdir, os.remove, os.unlink):
+        if func not in (os.open,):
+            warnings.warn(
+                PytestWarning(
+                    "(rm_rf) unknown function {} when removing {}:\n{}: {}".format(
+                        func, path, type(exc), exc
+                    )
+                )
+            )
+        return False
+
+    # Chmod + retry.
+    import stat
+
+    def chmod_rw(p: str) -> None:
+        mode = os.stat(p).st_mode
+        os.chmod(p, mode | stat.S_IRUSR | stat.S_IWUSR)
+
+    # For files, we need to recursively go upwards in the directories to
+    # ensure they all are also writable.
+    p = Path(path)
+    if p.is_file():
+        for parent in p.parents:
+            chmod_rw(str(parent))
+            # Stop when we reach the original path passed to rm_rf.
+            if parent == start_path:
+                break
+    chmod_rw(str(path))
+
+    func(path)
+    return True
+
+
+def ensure_extended_length_path(path: Path) -> Path:
+    """Get the extended-length version of a path (Windows).
+
+    On Windows, by default, the maximum length of a path (MAX_PATH) is 260
+    characters, and operations on paths longer than that fail. But it is possible
+    to overcome this by converting the path to "extended-length" form before
+    performing the operation:
+    https://docs.microsoft.com/en-us/windows/win32/fileio/naming-a-file#maximum-path-length-limitation
+
+    On Windows, this function returns the extended-length absolute version of path.
+    On other platforms it returns path unchanged.
+    """
+    if sys.platform.startswith("win32"):
+        path = path.resolve()
+        path = Path(get_extended_length_path_str(str(path)))
+    return path
+
+
+def get_extended_length_path_str(path: str) -> str:
+    """Convert a path to a Windows extended length path."""
+    long_path_prefix = "\\\\?\\"
+    unc_long_path_prefix = "\\\\?\\UNC\\"
+    if path.startswith((long_path_prefix, unc_long_path_prefix)):
+        return path
+    # UNC
+    if path.startswith("\\\\"):
+        return unc_long_path_prefix + path[2:]
+    return long_path_prefix + path
+
+
+def rm_rf(path: Path) -> None:
+    """Remove the path contents recursively, even if some elements
+    are read-only."""
+    path = ensure_extended_length_path(path)
+    onerror = partial(on_rm_rf_error, start_path=path)
+    if sys.version_info >= (3, 12):
+        shutil.rmtree(str(path), onexc=onerror)
+    else:
+        shutil.rmtree(str(path), onerror=onerror)
+
+
+def find_prefixed(root: Path, prefix: str) -> Iterator[Path]:
+    """Find all elements in root that begin with the prefix, case insensitive."""
+    l_prefix = prefix.lower()
+    for x in root.iterdir():
+        if x.name.lower().startswith(l_prefix):
+            yield x
+
+
+def extract_suffixes(iter: Iterable[PurePath], prefix: str) -> Iterator[str]:
+    """Return the parts of the paths following the prefix.
+
+    :param iter: Iterator over path names.
+    :param prefix: Expected prefix of the path names.
+    """
+    p_len = len(prefix)
+    for p in iter:
+        yield p.name[p_len:]
+
+
+def find_suffixes(root: Path, prefix: str) -> Iterator[str]:
+    """Combine find_prefixes and extract_suffixes."""
+    return extract_suffixes(find_prefixed(root, prefix), prefix)
+
+
+def parse_num(maybe_num) -> int:
+    """Parse number path suffixes, returns -1 on error."""
+    try:
+        return int(maybe_num)
+    except ValueError:
+        return -1
+
+
+def _force_symlink(
+    root: Path, target: Union[str, PurePath], link_to: Union[str, Path]
+) -> None:
+    """Helper to create the current symlink.
+
+    It's full of race conditions that are reasonably OK to ignore
+    for the context of best effort linking to the latest test run.
+
+    The presumption being that in case of much parallelism
+    the inaccuracy is going to be acceptable.
+    """
+    current_symlink = root.joinpath(target)
+    try:
+        current_symlink.unlink()
+    except OSError:
+        pass
+    try:
+        current_symlink.symlink_to(link_to)
+    except Exception:
+        pass
+
+
+def make_numbered_dir(root: Path, prefix: str, mode: int = 0o700) -> Path:
+    """Create a directory with an increased number as suffix for the given prefix."""
+    for i in range(10):
+        # try up to 10 times to create the folder
+        max_existing = max(map(parse_num, find_suffixes(root, prefix)), default=-1)
+        new_number = max_existing + 1
+        new_path = root.joinpath(f"{prefix}{new_number}")
+        try:
+            new_path.mkdir(mode=mode)
+        except Exception:
+            pass
+        else:
+            _force_symlink(root, prefix + "current", new_path)
+            return new_path
+    else:
+        raise OSError(
+            "could not create numbered dir with prefix "
+            "{prefix} in {root} after 10 tries".format(prefix=prefix, root=root)
+        )
+
+
+def create_cleanup_lock(p: Path) -> Path:
+    """Create a lock to prevent premature folder cleanup."""
+    lock_path = get_lock_path(p)
+    try:
+        fd = os.open(str(lock_path), os.O_WRONLY | os.O_CREAT | os.O_EXCL, 0o644)
+    except FileExistsError as e:
+        raise OSError(f"cannot create lockfile in {p}") from e
+    else:
+        pid = os.getpid()
+        spid = str(pid).encode()
+        os.write(fd, spid)
+        os.close(fd)
+        if not lock_path.is_file():
+            raise OSError("lock path got renamed after successful creation")
+        return lock_path
+
+
+def register_cleanup_lock_removal(lock_path: Path, register=atexit.register):
+    """Register a cleanup function for removing a lock, by default on atexit."""
+    pid = os.getpid()
+
+    def cleanup_on_exit(lock_path: Path = lock_path, original_pid: int = pid) -> None:
+        current_pid = os.getpid()
+        if current_pid != original_pid:
+            # fork
+            return
+        try:
+            lock_path.unlink()
+        except OSError:
+            pass
+
+    return register(cleanup_on_exit)
+
+
+def maybe_delete_a_numbered_dir(path: Path) -> None:
+    """Remove a numbered directory if its lock can be obtained and it does
+    not seem to be in use."""
+    path = ensure_extended_length_path(path)
+    lock_path = None
+    try:
+        lock_path = create_cleanup_lock(path)
+        parent = path.parent
+
+        garbage = parent.joinpath(f"garbage-{uuid.uuid4()}")
+        path.rename(garbage)
+        rm_rf(garbage)
+    except OSError:
+        #  known races:
+        #  * other process did a cleanup at the same time
+        #  * deletable folder was found
+        #  * process cwd (Windows)
+        return
+    finally:
+        # If we created the lock, ensure we remove it even if we failed
+        # to properly remove the numbered dir.
+        if lock_path is not None:
+            try:
+                lock_path.unlink()
+            except OSError:
+                pass
+
+
+def ensure_deletable(path: Path, consider_lock_dead_if_created_before: float) -> bool:
+    """Check if `path` is deletable based on whether the lock file is expired."""
+    if path.is_symlink():
+        return False
+    lock = get_lock_path(path)
+    try:
+        if not lock.is_file():
+            return True
+    except OSError:
+        # we might not have access to the lock file at all, in this case assume
+        # we don't have access to the entire directory (#7491).
+        return False
+    try:
+        lock_time = lock.stat().st_mtime
+    except Exception:
+        return False
+    else:
+        if lock_time < consider_lock_dead_if_created_before:
+            # We want to ignore any errors while trying to remove the lock such as:
+            # - PermissionDenied, like the file permissions have changed since the lock creation;
+            # - FileNotFoundError, in case another pytest process got here first;
+            # and any other cause of failure.
+            with contextlib.suppress(OSError):
+                lock.unlink()
+                return True
+        return False
+
+
+def try_cleanup(path: Path, consider_lock_dead_if_created_before: float) -> None:
+    """Try to cleanup a folder if we can ensure it's deletable."""
+    if ensure_deletable(path, consider_lock_dead_if_created_before):
+        maybe_delete_a_numbered_dir(path)
+
+
+def cleanup_candidates(root: Path, prefix: str, keep: int) -> Iterator[Path]:
+    """List candidates for numbered directories to be removed - follows py.path."""
+    max_existing = max(map(parse_num, find_suffixes(root, prefix)), default=-1)
+    max_delete = max_existing - keep
+    paths = find_prefixed(root, prefix)
+    paths, paths2 = itertools.tee(paths)
+    numbers = map(parse_num, extract_suffixes(paths2, prefix))
+    for path, number in zip(paths, numbers):
+        if number <= max_delete:
+            yield path
+
+
+def cleanup_dead_symlinks(root: Path):
+    for left_dir in root.iterdir():
+        if left_dir.is_symlink():
+            if not left_dir.resolve().exists():
+                left_dir.unlink()
+
+
+def cleanup_numbered_dir(
+    root: Path, prefix: str, keep: int, consider_lock_dead_if_created_before: float
+) -> None:
+    """Cleanup for lock driven numbered directories."""
+    if not root.exists():
+        return
+    for path in cleanup_candidates(root, prefix, keep):
+        try_cleanup(path, consider_lock_dead_if_created_before)
+    for path in root.glob("garbage-*"):
+        try_cleanup(path, consider_lock_dead_if_created_before)
+
+    cleanup_dead_symlinks(root)
+
+
+def make_numbered_dir_with_cleanup(
+    root: Path,
+    prefix: str,
+    keep: int,
+    lock_timeout: float,
+    mode: int,
+) -> Path:
+    """Create a numbered dir with a cleanup lock and remove old ones."""
+    e = None
+    for i in range(10):
+        try:
+            p = make_numbered_dir(root, prefix, mode)
+            # Only lock the current dir when keep is not 0
+            if keep != 0:
+                lock_path = create_cleanup_lock(p)
+                register_cleanup_lock_removal(lock_path)
+        except Exception as exc:
+            e = exc
+        else:
+            consider_lock_dead_if_created_before = p.stat().st_mtime - lock_timeout
+            # Register a cleanup for program exit
+            atexit.register(
+                cleanup_numbered_dir,
+                root,
+                prefix,
+                keep,
+                consider_lock_dead_if_created_before,
+            )
+            return p
+    assert e is not None
+    raise e
+
+
+def resolve_from_str(input: str, rootpath: Path) -> Path:
+    input = expanduser(input)
+    input = expandvars(input)
+    if isabs(input):
+        return Path(input)
+    else:
+        return rootpath.joinpath(input)
+
+
+def fnmatch_ex(pattern: str, path: Union[str, "os.PathLike[str]"]) -> bool:
+    """A port of FNMatcher from py.path.common which works with PurePath() instances.
+
+    The difference between this algorithm and PurePath.match() is that the
+    latter matches "**" glob expressions for each part of the path, while
+    this algorithm uses the whole path instead.
+
+    For example:
+        "tests/foo/bar/doc/test_foo.py" matches pattern "tests/**/doc/test*.py"
+        with this algorithm, but not with PurePath.match().
+
+    This algorithm was ported to keep backward-compatibility with existing
+    settings which assume paths match according this logic.
+
+    References:
+    * https://bugs.python.org/issue29249
+    * https://bugs.python.org/issue34731
+    """
+    path = PurePath(path)
+    iswin32 = sys.platform.startswith("win")
+
+    if iswin32 and sep not in pattern and posix_sep in pattern:
+        # Running on Windows, the pattern has no Windows path separators,
+        # and the pattern has one or more Posix path separators. Replace
+        # the Posix path separators with the Windows path separator.
+        pattern = pattern.replace(posix_sep, sep)
+
+    if sep not in pattern:
+        name = path.name
+    else:
+        name = str(path)
+        if path.is_absolute() and not os.path.isabs(pattern):
+            pattern = f"*{os.sep}{pattern}"
+    return fnmatch.fnmatch(name, pattern)
+
+
+def parts(s: str) -> Set[str]:
+    parts = s.split(sep)
+    return {sep.join(parts[: i + 1]) or sep for i in range(len(parts))}
+
+
+def symlink_or_skip(src, dst, **kwargs):
+    """Make a symlink, or skip the test in case symlinks are not supported."""
+    try:
+        os.symlink(str(src), str(dst), **kwargs)
+    except OSError as e:
+        skip(f"symlinks not supported: {e}")
+
+
+class ImportMode(Enum):
+    """Possible values for `mode` parameter of `import_path`."""
+
+    prepend = "prepend"
+    append = "append"
+    importlib = "importlib"
+
+
+class ImportPathMismatchError(ImportError):
+    """Raised on import_path() if there is a mismatch of __file__'s.
+
+    This can happen when `import_path` is called multiple times with different filenames that has
+    the same basename but reside in packages
+    (for example "/tests1/test_foo.py" and "/tests2/test_foo.py").
+    """
+
+
+def import_path(
+    p: Union[str, "os.PathLike[str]"],
+    *,
+    mode: Union[str, ImportMode] = ImportMode.prepend,
+    root: Path,
+) -> ModuleType:
+    """Import and return a module from the given path, which can be a file (a module) or
+    a directory (a package).
+
+    The import mechanism used is controlled by the `mode` parameter:
+
+    * `mode == ImportMode.prepend`: the directory containing the module (or package, taking
+      `__init__.py` files into account) will be put at the *start* of `sys.path` before
+      being imported with `importlib.import_module`.
+
+    * `mode == ImportMode.append`: same as `prepend`, but the directory will be appended
+      to the end of `sys.path`, if not already in `sys.path`.
+
+    * `mode == ImportMode.importlib`: uses more fine control mechanisms provided by `importlib`
+      to import the module, which avoids having to muck with `sys.path` at all. It effectively
+      allows having same-named test modules in different places.
+
+    :param root:
+        Used as an anchor when mode == ImportMode.importlib to obtain
+        a unique name for the module being imported so it can safely be stored
+        into ``sys.modules``.
+
+    :raises ImportPathMismatchError:
+        If after importing the given `path` and the module `__file__`
+        are different. Only raised in `prepend` and `append` modes.
+    """
+    mode = ImportMode(mode)
+
+    path = Path(p)
+
+    if not path.exists():
+        raise ImportError(path)
+
+    if mode is ImportMode.importlib:
+        module_name = module_name_from_path(path, root)
+        with contextlib.suppress(KeyError):
+            return sys.modules[module_name]
+
+        for meta_importer in sys.meta_path:
+            spec = meta_importer.find_spec(module_name, [str(path.parent)])
+            if spec is not None:
+                break
+        else:
+            spec = importlib.util.spec_from_file_location(module_name, str(path))
+
+        if spec is None:
+            raise ImportError(f"Can't find module {module_name} at location {path}")
+        mod = importlib.util.module_from_spec(spec)
+        sys.modules[module_name] = mod
+        spec.loader.exec_module(mod)  # type: ignore[union-attr]
+        insert_missing_modules(sys.modules, module_name)
+        return mod
+
+    pkg_path = resolve_package_path(path)
+    if pkg_path is not None:
+        pkg_root = pkg_path.parent
+        names = list(path.with_suffix("").relative_to(pkg_root).parts)
+        if names[-1] == "__init__":
+            names.pop()
+        module_name = ".".join(names)
+    else:
+        pkg_root = path.parent
+        module_name = path.stem
+
+    # Change sys.path permanently: restoring it at the end of this function would cause surprising
+    # problems because of delayed imports: for example, a conftest.py file imported by this function
+    # might have local imports, which would fail at runtime if we restored sys.path.
+    if mode is ImportMode.append:
+        if str(pkg_root) not in sys.path:
+            sys.path.append(str(pkg_root))
+    elif mode is ImportMode.prepend:
+        if str(pkg_root) != sys.path[0]:
+            sys.path.insert(0, str(pkg_root))
+    else:
+        assert_never(mode)
+
+    importlib.import_module(module_name)
+
+    mod = sys.modules[module_name]
+    if path.name == "__init__.py":
+        return mod
+
+    ignore = os.environ.get("PY_IGNORE_IMPORTMISMATCH", "")
+    if ignore != "1":
+        module_file = mod.__file__
+        if module_file is None:
+            raise ImportPathMismatchError(module_name, module_file, path)
+
+        if module_file.endswith((".pyc", ".pyo")):
+            module_file = module_file[:-1]
+        if module_file.endswith(os.sep + "__init__.py"):
+            module_file = module_file[: -(len(os.sep + "__init__.py"))]
+
+        try:
+            is_same = _is_same(str(path), module_file)
+        except FileNotFoundError:
+            is_same = False
+
+        if not is_same:
+            raise ImportPathMismatchError(module_name, module_file, path)
+
+    return mod
+
+
+# Implement a special _is_same function on Windows which returns True if the two filenames
+# compare equal, to circumvent os.path.samefile returning False for mounts in UNC (#7678).
+if sys.platform.startswith("win"):
+
+    def _is_same(f1: str, f2: str) -> bool:
+        return Path(f1) == Path(f2) or os.path.samefile(f1, f2)
+
+else:
+
+    def _is_same(f1: str, f2: str) -> bool:
+        return os.path.samefile(f1, f2)
+
+
+def module_name_from_path(path: Path, root: Path) -> str:
+    """
+    Return a dotted module name based on the given path, anchored on root.
+
+    For example: path="projects/src/tests/test_foo.py" and root="/projects", the
+    resulting module name will be "src.tests.test_foo".
+    """
+    path = path.with_suffix("")
+    try:
+        relative_path = path.relative_to(root)
+    except ValueError:
+        # If we can't get a relative path to root, use the full path, except
+        # for the first part ("d:\\" or "/" depending on the platform, for example).
+        path_parts = path.parts[1:]
+    else:
+        # Use the parts for the relative path to the root path.
+        path_parts = relative_path.parts
+
+    # Module name for packages do not contain the __init__ file.
+    if path_parts[-1] == "__init__":
+        path_parts = path_parts[:-1]
+
+    return ".".join(path_parts)
+
+
+def insert_missing_modules(modules: Dict[str, ModuleType], module_name: str) -> None:
+    """
+    Used by ``import_path`` to create intermediate modules when using mode=importlib.
+
+    When we want to import a module as "src.tests.test_foo" for example, we need
+    to create empty modules "src" and "src.tests" after inserting "src.tests.test_foo",
+    otherwise "src.tests.test_foo" is not importable by ``__import__``.
+    """
+    module_parts = module_name.split(".")
+    child_module: Union[ModuleType, None] = None
+    module: Union[ModuleType, None] = None
+    child_name: str = ""
+    while module_name:
+        if module_name not in modules:
+            try:
+                # If sys.meta_path is empty, calling import_module will issue
+                # a warning and raise ModuleNotFoundError. To avoid the
+                # warning, we check sys.meta_path explicitly and raise the error
+                # ourselves to fall back to creating a dummy module.
+                if not sys.meta_path:
+                    raise ModuleNotFoundError
+                module = importlib.import_module(module_name)
+            except ModuleNotFoundError:
+                module = ModuleType(
+                    module_name,
+                    doc="Empty module created by pytest's importmode=importlib.",
+                )
+        else:
+            module = modules[module_name]
+        if child_module:
+            # Add child attribute to the parent that can reference the child
+            # modules.
+            if not hasattr(module, child_name):
+                setattr(module, child_name, child_module)
+                modules[module_name] = module
+        # Keep track of the child module while moving up the tree.
+        child_module, child_name = module, module_name.rpartition(".")[-1]
+        module_parts.pop(-1)
+        module_name = ".".join(module_parts)
+
+
+def resolve_package_path(path: Path) -> Optional[Path]:
+    """Return the Python package path by looking for the last
+    directory upwards which still contains an __init__.py.
+
+    Returns None if it can not be determined.
+    """
+    result = None
+    for parent in itertools.chain((path,), path.parents):
+        if parent.is_dir():
+            if not parent.joinpath("__init__.py").is_file():
+                break
+            if not parent.name.isidentifier():
+                break
+            result = parent
+    return result
+
+
+def scandir(path: Union[str, "os.PathLike[str]"]) -> List["os.DirEntry[str]"]:
+    """Scan a directory recursively, in breadth-first order.
+
+    The returned entries are sorted.
+    """
+    entries = []
+    with os.scandir(path) as s:
+        # Skip entries with symlink loops and other brokenness, so the caller
+        # doesn't have to deal with it.
+        for entry in s:
+            try:
+                entry.is_file()
+            except OSError as err:
+                if _ignore_error(err):
+                    continue
+                raise
+            entries.append(entry)
+    entries.sort(key=lambda entry: entry.name)
+    return entries
+
+
+def visit(
+    path: Union[str, "os.PathLike[str]"], recurse: Callable[["os.DirEntry[str]"], bool]
+) -> Iterator["os.DirEntry[str]"]:
+    """Walk a directory recursively, in breadth-first order.
+
+    The `recurse` predicate determines whether a directory is recursed.
+
+    Entries at each directory level are sorted.
+    """
+    entries = scandir(path)
+    yield from entries
+    for entry in entries:
+        if entry.is_dir() and recurse(entry):
+            yield from visit(entry.path, recurse)
+
+
+def absolutepath(path: Union[Path, str]) -> Path:
+    """Convert a path to an absolute path using os.path.abspath.
+
+    Prefer this over Path.resolve() (see #6523).
+    Prefer this over Path.absolute() (not public, doesn't normalize).
+    """
+    return Path(os.path.abspath(str(path)))
+
+
+def commonpath(path1: Path, path2: Path) -> Optional[Path]:
+    """Return the common part shared with the other path, or None if there is
+    no common part.
+
+    If one path is relative and one is absolute, returns None.
+    """
+    try:
+        return Path(os.path.commonpath((str(path1), str(path2))))
+    except ValueError:
+        return None
+
+
+def bestrelpath(directory: Path, dest: Path) -> str:
+    """Return a string which is a relative path from directory to dest such
+    that directory/bestrelpath == dest.
+
+    The paths must be either both absolute or both relative.
+
+    If no such path can be determined, returns dest.
+    """
+    assert isinstance(directory, Path)
+    assert isinstance(dest, Path)
+    if dest == directory:
+        return os.curdir
+    # Find the longest common directory.
+    base = commonpath(directory, dest)
+    # Can be the case on Windows for two absolute paths on different drives.
+    # Can be the case for two relative paths without common prefix.
+    # Can be the case for a relative path and an absolute path.
+    if not base:
+        return str(dest)
+    reldirectory = directory.relative_to(base)
+    reldest = dest.relative_to(base)
+    return os.path.join(
+        # Back from directory to base.
+        *([os.pardir] * len(reldirectory.parts)),
+        # Forward from base to dest.
+        *reldest.parts,
+    )
+
+
+# Originates from py. path.local.copy(), with siginficant trims and adjustments.
+# TODO(py38): Replace with shutil.copytree(..., symlinks=True, dirs_exist_ok=True)
+def copytree(source: Path, target: Path) -> None:
+    """Recursively copy a source directory to target."""
+    assert source.is_dir()
+    for entry in visit(source, recurse=lambda entry: not entry.is_symlink()):
+        x = Path(entry)
+        relpath = x.relative_to(source)
+        newx = target / relpath
+        newx.parent.mkdir(exist_ok=True)
+        if x.is_symlink():
+            newx.symlink_to(os.readlink(x))
+        elif x.is_file():
+            shutil.copyfile(x, newx)
+        elif x.is_dir():
+            newx.mkdir(exist_ok=True)
+
+
+def safe_exists(p: Path) -> bool:
+    """Like Path.exists(), but account for input arguments that might be too long (#11394)."""
+    try:
+        return p.exists()
+    except (ValueError, OSError):
+        # ValueError: stat: path too long for Windows
+        # OSError: [WinError 123] The filename, directory name, or volume label syntax is incorrect
+        return False
diff --git a/contrib/python/pytest/py3/_pytest/py.typed b/contrib/python/pytest/py3/_pytest/py.typed
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/py.typed
diff --git a/contrib/python/pytest/py3/_pytest/pytester.py b/contrib/python/pytest/py3/_pytest/pytester.py
new file mode 100644
index 0000000000..cdfc2c04ae
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/pytester.py
@@ -0,0 +1,1789 @@
+"""(Disabled by default) support for testing pytest and pytest plugins.
+
+PYTEST_DONT_REWRITE
+"""
+import collections.abc
+import contextlib
+import gc
+import importlib
+import locale
+import os
+import platform
+import re
+import shutil
+import subprocess
+import sys
+import traceback
+from fnmatch import fnmatch
+from io import StringIO
+from pathlib import Path
+from typing import Any
+from typing import Callable
+from typing import Dict
+from typing import Generator
+from typing import IO
+from typing import Iterable
+from typing import List
+from typing import Optional
+from typing import overload
+from typing import Sequence
+from typing import TextIO
+from typing import Tuple
+from typing import Type
+from typing import TYPE_CHECKING
+from typing import Union
+from weakref import WeakKeyDictionary
+
+from iniconfig import IniConfig
+from iniconfig import SectionWrapper
+
+from _pytest import timing
+from _pytest._code import Source
+from _pytest.capture import _get_multicapture
+from _pytest.compat import final
+from _pytest.compat import NOTSET
+from _pytest.compat import NotSetType
+from _pytest.config import _PluggyPlugin
+from _pytest.config import Config
+from _pytest.config import ExitCode
+from _pytest.config import hookimpl
+from _pytest.config import main
+from _pytest.config import PytestPluginManager
+from _pytest.config.argparsing import Parser
+from _pytest.deprecated import check_ispytest
+from _pytest.fixtures import fixture
+from _pytest.fixtures import FixtureRequest
+from _pytest.main import Session
+from _pytest.monkeypatch import MonkeyPatch
+from _pytest.nodes import Collector
+from _pytest.nodes import Item
+from _pytest.outcomes import fail
+from _pytest.outcomes import importorskip
+from _pytest.outcomes import skip
+from _pytest.pathlib import bestrelpath
+from _pytest.pathlib import copytree
+from _pytest.pathlib import make_numbered_dir
+from _pytest.reports import CollectReport
+from _pytest.reports import TestReport
+from _pytest.tmpdir import TempPathFactory
+from _pytest.warning_types import PytestWarning
+
+
+if TYPE_CHECKING:
+    from typing_extensions import Final
+    from typing_extensions import Literal
+
+    import pexpect
+
+
+pytest_plugins = ["pytester_assertions"]
+
+
+IGNORE_PAM = [  # filenames added when obtaining details about the current user
+    "/var/lib/sss/mc/passwd"
+]
+
+
+def pytest_addoption(parser: Parser) -> None:
+    parser.addoption(
+        "--lsof",
+        action="store_true",
+        dest="lsof",
+        default=False,
+        help="Run FD checks if lsof is available",
+    )
+
+    parser.addoption(
+        "--runpytest",
+        default="inprocess",
+        dest="runpytest",
+        choices=("inprocess", "subprocess"),
+        help=(
+            "Run pytest sub runs in tests using an 'inprocess' "
+            "or 'subprocess' (python -m main) method"
+        ),
+    )
+
+    parser.addini(
+        "pytester_example_dir", help="Directory to take the pytester example files from"
+    )
+
+
+def pytest_configure(config: Config) -> None:
+    if config.getvalue("lsof"):
+        checker = LsofFdLeakChecker()
+        if checker.matching_platform():
+            config.pluginmanager.register(checker)
+
+    config.addinivalue_line(
+        "markers",
+        "pytester_example_path(*path_segments): join the given path "
+        "segments to `pytester_example_dir` for this test.",
+    )
+
+
+class LsofFdLeakChecker:
+    def get_open_files(self) -> List[Tuple[str, str]]:
+        out = subprocess.run(
+            ("lsof", "-Ffn0", "-p", str(os.getpid())),
+            stdout=subprocess.PIPE,
+            stderr=subprocess.DEVNULL,
+            check=True,
+            text=True,
+            encoding=locale.getpreferredencoding(False),
+        ).stdout
+
+        def isopen(line: str) -> bool:
+            return line.startswith("f") and (
+                "deleted" not in line
+                and "mem" not in line
+                and "txt" not in line
+                and "cwd" not in line
+            )
+
+        open_files = []
+
+        for line in out.split("\n"):
+            if isopen(line):
+                fields = line.split("\0")
+                fd = fields[0][1:]
+                filename = fields[1][1:]
+                if filename in IGNORE_PAM:
+                    continue
+                if filename.startswith("/"):
+                    open_files.append((fd, filename))
+
+        return open_files
+
+    def matching_platform(self) -> bool:
+        try:
+            subprocess.run(("lsof", "-v"), check=True)
+        except (OSError, subprocess.CalledProcessError):
+            return False
+        else:
+            return True
+
+    @hookimpl(hookwrapper=True, tryfirst=True)
+    def pytest_runtest_protocol(self, item: Item) -> Generator[None, None, None]:
+        lines1 = self.get_open_files()
+        yield
+        if hasattr(sys, "pypy_version_info"):
+            gc.collect()
+        lines2 = self.get_open_files()
+
+        new_fds = {t[0] for t in lines2} - {t[0] for t in lines1}
+        leaked_files = [t for t in lines2 if t[0] in new_fds]
+        if leaked_files:
+            error = [
+                "***** %s FD leakage detected" % len(leaked_files),
+                *(str(f) for f in leaked_files),
+                "*** Before:",
+                *(str(f) for f in lines1),
+                "*** After:",
+                *(str(f) for f in lines2),
+                "***** %s FD leakage detected" % len(leaked_files),
+                "*** function %s:%s: %s " % item.location,
+                "See issue #2366",
+            ]
+            item.warn(PytestWarning("\n".join(error)))
+
+
+# used at least by pytest-xdist plugin
+
+
+@fixture
+def _pytest(request: FixtureRequest) -> "PytestArg":
+    """Return a helper which offers a gethookrecorder(hook) method which
+    returns a HookRecorder instance which helps to make assertions about called
+    hooks."""
+    return PytestArg(request)
+
+
+class PytestArg:
+    def __init__(self, request: FixtureRequest) -> None:
+        self._request = request
+
+    def gethookrecorder(self, hook) -> "HookRecorder":
+        hookrecorder = HookRecorder(hook._pm)
+        self._request.addfinalizer(hookrecorder.finish_recording)
+        return hookrecorder
+
+
+def get_public_names(values: Iterable[str]) -> List[str]:
+    """Only return names from iterator values without a leading underscore."""
+    return [x for x in values if x[0] != "_"]
+
+
+@final
+class RecordedHookCall:
+    """A recorded call to a hook.
+
+    The arguments to the hook call are set as attributes.
+    For example:
+
+    .. code-block:: python
+
+        calls = hook_recorder.getcalls("pytest_runtest_setup")
+        # Suppose pytest_runtest_setup was called once with `item=an_item`.
+        assert calls[0].item is an_item
+    """
+
+    def __init__(self, name: str, kwargs) -> None:
+        self.__dict__.update(kwargs)
+        self._name = name
+
+    def __repr__(self) -> str:
+        d = self.__dict__.copy()
+        del d["_name"]
+        return f"<RecordedHookCall {self._name!r}(**{d!r})>"
+
+    if TYPE_CHECKING:
+        # The class has undetermined attributes, this tells mypy about it.
+        def __getattr__(self, key: str):
+            ...
+
+
+@final
+class HookRecorder:
+    """Record all hooks called in a plugin manager.
+
+    Hook recorders are created by :class:`Pytester`.
+
+    This wraps all the hook calls in the plugin manager, recording each call
+    before propagating the normal calls.
+    """
+
+    def __init__(
+        self, pluginmanager: PytestPluginManager, *, _ispytest: bool = False
+    ) -> None:
+        check_ispytest(_ispytest)
+
+        self._pluginmanager = pluginmanager
+        self.calls: List[RecordedHookCall] = []
+        self.ret: Optional[Union[int, ExitCode]] = None
+
+        def before(hook_name: str, hook_impls, kwargs) -> None:
+            self.calls.append(RecordedHookCall(hook_name, kwargs))
+
+        def after(outcome, hook_name: str, hook_impls, kwargs) -> None:
+            pass
+
+        self._undo_wrapping = pluginmanager.add_hookcall_monitoring(before, after)
+
+    def finish_recording(self) -> None:
+        self._undo_wrapping()
+
+    def getcalls(self, names: Union[str, Iterable[str]]) -> List[RecordedHookCall]:
+        """Get all recorded calls to hooks with the given names (or name)."""
+        if isinstance(names, str):
+            names = names.split()
+        return [call for call in self.calls if call._name in names]
+
+    def assert_contains(self, entries: Sequence[Tuple[str, str]]) -> None:
+        __tracebackhide__ = True
+        i = 0
+        entries = list(entries)
+        backlocals = sys._getframe(1).f_locals
+        while entries:
+            name, check = entries.pop(0)
+            for ind, call in enumerate(self.calls[i:]):
+                if call._name == name:
+                    print("NAMEMATCH", name, call)
+                    if eval(check, backlocals, call.__dict__):
+                        print("CHECKERMATCH", repr(check), "->", call)
+                    else:
+                        print("NOCHECKERMATCH", repr(check), "-", call)
+                        continue
+                    i += ind + 1
+                    break
+                print("NONAMEMATCH", name, "with", call)
+            else:
+                fail(f"could not find {name!r} check {check!r}")
+
+    def popcall(self, name: str) -> RecordedHookCall:
+        __tracebackhide__ = True
+        for i, call in enumerate(self.calls):
+            if call._name == name:
+                del self.calls[i]
+                return call
+        lines = [f"could not find call {name!r}, in:"]
+        lines.extend(["  %s" % x for x in self.calls])
+        fail("\n".join(lines))
+
+    def getcall(self, name: str) -> RecordedHookCall:
+        values = self.getcalls(name)
+        assert len(values) == 1, (name, values)
+        return values[0]
+
+    # functionality for test reports
+
+    @overload
+    def getreports(
+        self,
+        names: "Literal['pytest_collectreport']",
+    ) -> Sequence[CollectReport]:
+        ...
+
+    @overload
+    def getreports(
+        self,
+        names: "Literal['pytest_runtest_logreport']",
+    ) -> Sequence[TestReport]:
+        ...
+
+    @overload
+    def getreports(
+        self,
+        names: Union[str, Iterable[str]] = (
+            "pytest_collectreport",
+            "pytest_runtest_logreport",
+        ),
+    ) -> Sequence[Union[CollectReport, TestReport]]:
+        ...
+
+    def getreports(
+        self,
+        names: Union[str, Iterable[str]] = (
+            "pytest_collectreport",
+            "pytest_runtest_logreport",
+        ),
+    ) -> Sequence[Union[CollectReport, TestReport]]:
+        return [x.report for x in self.getcalls(names)]
+
+    def matchreport(
+        self,
+        inamepart: str = "",
+        names: Union[str, Iterable[str]] = (
+            "pytest_runtest_logreport",
+            "pytest_collectreport",
+        ),
+        when: Optional[str] = None,
+    ) -> Union[CollectReport, TestReport]:
+        """Return a testreport whose dotted import path matches."""
+        values = []
+        for rep in self.getreports(names=names):
+            if not when and rep.when != "call" and rep.passed:
+                # setup/teardown passing reports - let's ignore those
+                continue
+            if when and rep.when != when:
+                continue
+            if not inamepart or inamepart in rep.nodeid.split("::"):
+                values.append(rep)
+        if not values:
+            raise ValueError(
+                "could not find test report matching %r: "
+                "no test reports at all!" % (inamepart,)
+            )
+        if len(values) > 1:
+            raise ValueError(
+                "found 2 or more testreports matching {!r}: {}".format(
+                    inamepart, values
+                )
+            )
+        return values[0]
+
+    @overload
+    def getfailures(
+        self,
+        names: "Literal['pytest_collectreport']",
+    ) -> Sequence[CollectReport]:
+        ...
+
+    @overload
+    def getfailures(
+        self,
+        names: "Literal['pytest_runtest_logreport']",
+    ) -> Sequence[TestReport]:
+        ...
+
+    @overload
+    def getfailures(
+        self,
+        names: Union[str, Iterable[str]] = (
+            "pytest_collectreport",
+            "pytest_runtest_logreport",
+        ),
+    ) -> Sequence[Union[CollectReport, TestReport]]:
+        ...
+
+    def getfailures(
+        self,
+        names: Union[str, Iterable[str]] = (
+            "pytest_collectreport",
+            "pytest_runtest_logreport",
+        ),
+    ) -> Sequence[Union[CollectReport, TestReport]]:
+        return [rep for rep in self.getreports(names) if rep.failed]
+
+    def getfailedcollections(self) -> Sequence[CollectReport]:
+        return self.getfailures("pytest_collectreport")
+
+    def listoutcomes(
+        self,
+    ) -> Tuple[
+        Sequence[TestReport],
+        Sequence[Union[CollectReport, TestReport]],
+        Sequence[Union[CollectReport, TestReport]],
+    ]:
+        passed = []
+        skipped = []
+        failed = []
+        for rep in self.getreports(
+            ("pytest_collectreport", "pytest_runtest_logreport")
+        ):
+            if rep.passed:
+                if rep.when == "call":
+                    assert isinstance(rep, TestReport)
+                    passed.append(rep)
+            elif rep.skipped:
+                skipped.append(rep)
+            else:
+                assert rep.failed, f"Unexpected outcome: {rep!r}"
+                failed.append(rep)
+        return passed, skipped, failed
+
+    def countoutcomes(self) -> List[int]:
+        return [len(x) for x in self.listoutcomes()]
+
+    def assertoutcome(self, passed: int = 0, skipped: int = 0, failed: int = 0) -> None:
+        __tracebackhide__ = True
+        from _pytest.pytester_assertions import assertoutcome
+
+        outcomes = self.listoutcomes()
+        assertoutcome(
+            outcomes,
+            passed=passed,
+            skipped=skipped,
+            failed=failed,
+        )
+
+    def clear(self) -> None:
+        self.calls[:] = []
+
+
+@fixture
+def linecomp() -> "LineComp":
+    """A :class: `LineComp` instance for checking that an input linearly
+    contains a sequence of strings."""
+    return LineComp()
+
+
+@fixture(name="LineMatcher")
+def LineMatcher_fixture(request: FixtureRequest) -> Type["LineMatcher"]:
+    """A reference to the :class: `LineMatcher`.
+
+    This is instantiable with a list of lines (without their trailing newlines).
+    This is useful for testing large texts, such as the output of commands.
+    """
+    return LineMatcher
+
+
+@fixture
+def pytester(
+    request: FixtureRequest, tmp_path_factory: TempPathFactory, monkeypatch: MonkeyPatch
+) -> "Pytester":
+    """
+    Facilities to write tests/configuration files, execute pytest in isolation, and match
+    against expected output, perfect for black-box testing of pytest plugins.
+
+    It attempts to isolate the test run from external factors as much as possible, modifying
+    the current working directory to ``path`` and environment variables during initialization.
+
+    It is particularly useful for testing plugins. It is similar to the :fixture:`tmp_path`
+    fixture but provides methods which aid in testing pytest itself.
+    """
+    return Pytester(request, tmp_path_factory, monkeypatch, _ispytest=True)
+
+
+@fixture
+def _sys_snapshot() -> Generator[None, None, None]:
+    snappaths = SysPathsSnapshot()
+    snapmods = SysModulesSnapshot()
+    yield
+    snapmods.restore()
+    snappaths.restore()
+
+
+@fixture
+def _config_for_test() -> Generator[Config, None, None]:
+    from _pytest.config import get_config
+
+    config = get_config()
+    yield config
+    config._ensure_unconfigure()  # cleanup, e.g. capman closing tmpfiles.
+
+
+# Regex to match the session duration string in the summary: "74.34s".
+rex_session_duration = re.compile(r"\d+\.\d\ds")
+# Regex to match all the counts and phrases in the summary line: "34 passed, 111 skipped".
+rex_outcome = re.compile(r"(\d+) (\w+)")
+
+
+@final
+class RunResult:
+    """The result of running a command from :class:`~pytest.Pytester`."""
+
+    def __init__(
+        self,
+        ret: Union[int, ExitCode],
+        outlines: List[str],
+        errlines: List[str],
+        duration: float,
+    ) -> None:
+        try:
+            self.ret: Union[int, ExitCode] = ExitCode(ret)
+            """The return value."""
+        except ValueError:
+            self.ret = ret
+        self.outlines = outlines
+        """List of lines captured from stdout."""
+        self.errlines = errlines
+        """List of lines captured from stderr."""
+        self.stdout = LineMatcher(outlines)
+        """:class:`~pytest.LineMatcher` of stdout.
+
+        Use e.g. :func:`str(stdout) <pytest.LineMatcher.__str__()>` to reconstruct stdout, or the commonly used
+        :func:`stdout.fnmatch_lines() <pytest.LineMatcher.fnmatch_lines()>` method.
+        """
+        self.stderr = LineMatcher(errlines)
+        """:class:`~pytest.LineMatcher` of stderr."""
+        self.duration = duration
+        """Duration in seconds."""
+
+    def __repr__(self) -> str:
+        return (
+            "<RunResult ret=%s len(stdout.lines)=%d len(stderr.lines)=%d duration=%.2fs>"
+            % (self.ret, len(self.stdout.lines), len(self.stderr.lines), self.duration)
+        )
+
+    def parseoutcomes(self) -> Dict[str, int]:
+        """Return a dictionary of outcome noun -> count from parsing the terminal
+        output that the test process produced.
+
+        The returned nouns will always be in plural form::
+
+            ======= 1 failed, 1 passed, 1 warning, 1 error in 0.13s ====
+
+        Will return ``{"failed": 1, "passed": 1, "warnings": 1, "errors": 1}``.
+        """
+        return self.parse_summary_nouns(self.outlines)
+
+    @classmethod
+    def parse_summary_nouns(cls, lines) -> Dict[str, int]:
+        """Extract the nouns from a pytest terminal summary line.
+
+        It always returns the plural noun for consistency::
+
+            ======= 1 failed, 1 passed, 1 warning, 1 error in 0.13s ====
+
+        Will return ``{"failed": 1, "passed": 1, "warnings": 1, "errors": 1}``.
+        """
+        for line in reversed(lines):
+            if rex_session_duration.search(line):
+                outcomes = rex_outcome.findall(line)
+                ret = {noun: int(count) for (count, noun) in outcomes}
+                break
+        else:
+            raise ValueError("Pytest terminal summary report not found")
+
+        to_plural = {
+            "warning": "warnings",
+            "error": "errors",
+        }
+        return {to_plural.get(k, k): v for k, v in ret.items()}
+
+    def assert_outcomes(
+        self,
+        passed: int = 0,
+        skipped: int = 0,
+        failed: int = 0,
+        errors: int = 0,
+        xpassed: int = 0,
+        xfailed: int = 0,
+        warnings: Optional[int] = None,
+        deselected: Optional[int] = None,
+    ) -> None:
+        """
+        Assert that the specified outcomes appear with the respective
+        numbers (0 means it didn't occur) in the text output from a test run.
+
+        ``warnings`` and ``deselected`` are only checked if not None.
+        """
+        __tracebackhide__ = True
+        from _pytest.pytester_assertions import assert_outcomes
+
+        outcomes = self.parseoutcomes()
+        assert_outcomes(
+            outcomes,
+            passed=passed,
+            skipped=skipped,
+            failed=failed,
+            errors=errors,
+            xpassed=xpassed,
+            xfailed=xfailed,
+            warnings=warnings,
+            deselected=deselected,
+        )
+
+
+class CwdSnapshot:
+    def __init__(self) -> None:
+        self.__saved = os.getcwd()
+
+    def restore(self) -> None:
+        os.chdir(self.__saved)
+
+
+class SysModulesSnapshot:
+    def __init__(self, preserve: Optional[Callable[[str], bool]] = None) -> None:
+        self.__preserve = preserve
+        self.__saved = dict(sys.modules)
+
+    def restore(self) -> None:
+        if self.__preserve:
+            self.__saved.update(
+                (k, m) for k, m in sys.modules.items() if self.__preserve(k)
+            )
+        sys.modules.clear()
+        sys.modules.update(self.__saved)
+
+
+class SysPathsSnapshot:
+    def __init__(self) -> None:
+        self.__saved = list(sys.path), list(sys.meta_path)
+
+    def restore(self) -> None:
+        sys.path[:], sys.meta_path[:] = self.__saved
+
+
+@final
+class Pytester:
+    """
+    Facilities to write tests/configuration files, execute pytest in isolation, and match
+    against expected output, perfect for black-box testing of pytest plugins.
+
+    It attempts to isolate the test run from external factors as much as possible, modifying
+    the current working directory to :attr:`path` and environment variables during initialization.
+    """
+
+    __test__ = False
+
+    CLOSE_STDIN: "Final" = NOTSET
+
+    class TimeoutExpired(Exception):
+        pass
+
+    def __init__(
+        self,
+        request: FixtureRequest,
+        tmp_path_factory: TempPathFactory,
+        monkeypatch: MonkeyPatch,
+        *,
+        _ispytest: bool = False,
+    ) -> None:
+        check_ispytest(_ispytest)
+        self._request = request
+        self._mod_collections: WeakKeyDictionary[
+            Collector, List[Union[Item, Collector]]
+        ] = WeakKeyDictionary()
+        if request.function:
+            name: str = request.function.__name__
+        else:
+            name = request.node.name
+        self._name = name
+        self._path: Path = tmp_path_factory.mktemp(name, numbered=True)
+        #: A list of plugins to use with :py:meth:`parseconfig` and
+        #: :py:meth:`runpytest`.  Initially this is an empty list but plugins can
+        #: be added to the list.  The type of items to add to the list depends on
+        #: the method using them so refer to them for details.
+        self.plugins: List[Union[str, _PluggyPlugin]] = []
+        self._cwd_snapshot = CwdSnapshot()
+        self._sys_path_snapshot = SysPathsSnapshot()
+        self._sys_modules_snapshot = self.__take_sys_modules_snapshot()
+        self.chdir()
+        self._request.addfinalizer(self._finalize)
+        self._method = self._request.config.getoption("--runpytest")
+        self._test_tmproot = tmp_path_factory.mktemp(f"tmp-{name}", numbered=True)
+
+        self._monkeypatch = mp = monkeypatch
+        mp.setenv("PYTEST_DEBUG_TEMPROOT", str(self._test_tmproot))
+        # Ensure no unexpected caching via tox.
+        mp.delenv("TOX_ENV_DIR", raising=False)
+        # Discard outer pytest options.
+        mp.delenv("PYTEST_ADDOPTS", raising=False)
+        # Ensure no user config is used.
+        tmphome = str(self.path)
+        mp.setenv("HOME", tmphome)
+        mp.setenv("USERPROFILE", tmphome)
+        # Do not use colors for inner runs by default.
+        mp.setenv("PY_COLORS", "0")
+
+    @property
+    def path(self) -> Path:
+        """Temporary directory path used to create files/run tests from, etc."""
+        return self._path
+
+    def __repr__(self) -> str:
+        return f"<Pytester {self.path!r}>"
+
+    def _finalize(self) -> None:
+        """
+        Clean up global state artifacts.
+
+        Some methods modify the global interpreter state and this tries to
+        clean this up. It does not remove the temporary directory however so
+        it can be looked at after the test run has finished.
+        """
+        self._sys_modules_snapshot.restore()
+        self._sys_path_snapshot.restore()
+        self._cwd_snapshot.restore()
+
+    def __take_sys_modules_snapshot(self) -> SysModulesSnapshot:
+        # Some zope modules used by twisted-related tests keep internal state
+        # and can't be deleted; we had some trouble in the past with
+        # `zope.interface` for example.
+        #
+        # Preserve readline due to https://bugs.python.org/issue41033.
+        # pexpect issues a SIGWINCH.
+        def preserve_module(name):
+            return name.startswith(("zope", "readline"))
+
+        return SysModulesSnapshot(preserve=preserve_module)
+
+    def make_hook_recorder(self, pluginmanager: PytestPluginManager) -> HookRecorder:
+        """Create a new :class:`HookRecorder` for a :class:`PytestPluginManager`."""
+        pluginmanager.reprec = reprec = HookRecorder(pluginmanager, _ispytest=True)  # type: ignore[attr-defined]
+        self._request.addfinalizer(reprec.finish_recording)
+        return reprec
+
+    def chdir(self) -> None:
+        """Cd into the temporary directory.
+
+        This is done automatically upon instantiation.
+        """
+        os.chdir(self.path)
+
+    def _makefile(
+        self,
+        ext: str,
+        lines: Sequence[Union[Any, bytes]],
+        files: Dict[str, str],
+        encoding: str = "utf-8",
+    ) -> Path:
+        items = list(files.items())
+
+        if ext and not ext.startswith("."):
+            raise ValueError(
+                f"pytester.makefile expects a file extension, try .{ext} instead of {ext}"
+            )
+
+        def to_text(s: Union[Any, bytes]) -> str:
+            return s.decode(encoding) if isinstance(s, bytes) else str(s)
+
+        if lines:
+            source = "\n".join(to_text(x) for x in lines)
+            basename = self._name
+            items.insert(0, (basename, source))
+
+        ret = None
+        for basename, value in items:
+            p = self.path.joinpath(basename).with_suffix(ext)
+            p.parent.mkdir(parents=True, exist_ok=True)
+            source_ = Source(value)
+            source = "\n".join(to_text(line) for line in source_.lines)
+            p.write_text(source.strip(), encoding=encoding)
+            if ret is None:
+                ret = p
+        assert ret is not None
+        return ret
+
+    def makefile(self, ext: str, *args: str, **kwargs: str) -> Path:
+        r"""Create new text file(s) in the test directory.
+
+        :param ext:
+            The extension the file(s) should use, including the dot, e.g. `.py`.
+        :param args:
+            All args are treated as strings and joined using newlines.
+            The result is written as contents to the file.  The name of the
+            file is based on the test function requesting this fixture.
+        :param kwargs:
+            Each keyword is the name of a file, while the value of it will
+            be written as contents of the file.
+        :returns:
+            The first created file.
+
+        Examples:
+
+        .. code-block:: python
+
+            pytester.makefile(".txt", "line1", "line2")
+
+            pytester.makefile(".ini", pytest="[pytest]\naddopts=-rs\n")
+
+        To create binary files, use :meth:`pathlib.Path.write_bytes` directly:
+
+        .. code-block:: python
+
+            filename = pytester.path.joinpath("foo.bin")
+            filename.write_bytes(b"...")
+        """
+        return self._makefile(ext, args, kwargs)
+
+    def makeconftest(self, source: str) -> Path:
+        """Write a contest.py file.
+
+        :param source: The contents.
+        :returns: The conftest.py file.
+        """
+        return self.makepyfile(conftest=source)
+
+    def makeini(self, source: str) -> Path:
+        """Write a tox.ini file.
+
+        :param source: The contents.
+        :returns: The tox.ini file.
+        """
+        return self.makefile(".ini", tox=source)
+
+    def getinicfg(self, source: str) -> SectionWrapper:
+        """Return the pytest section from the tox.ini config file."""
+        p = self.makeini(source)
+        return IniConfig(str(p))["pytest"]
+
+    def makepyprojecttoml(self, source: str) -> Path:
+        """Write a pyproject.toml file.
+
+        :param source: The contents.
+        :returns: The pyproject.ini file.
+
+        .. versionadded:: 6.0
+        """
+        return self.makefile(".toml", pyproject=source)
+
+    def makepyfile(self, *args, **kwargs) -> Path:
+        r"""Shortcut for .makefile() with a .py extension.
+
+        Defaults to the test name with a '.py' extension, e.g test_foobar.py, overwriting
+        existing files.
+
+        Examples:
+
+        .. code-block:: python
+
+            def test_something(pytester):
+                # Initial file is created test_something.py.
+                pytester.makepyfile("foobar")
+                # To create multiple files, pass kwargs accordingly.
+                pytester.makepyfile(custom="foobar")
+                # At this point, both 'test_something.py' & 'custom.py' exist in the test directory.
+
+        """
+        return self._makefile(".py", args, kwargs)
+
+    def maketxtfile(self, *args, **kwargs) -> Path:
+        r"""Shortcut for .makefile() with a .txt extension.
+
+        Defaults to the test name with a '.txt' extension, e.g test_foobar.txt, overwriting
+        existing files.
+
+        Examples:
+
+        .. code-block:: python
+
+            def test_something(pytester):
+                # Initial file is created test_something.txt.
+                pytester.maketxtfile("foobar")
+                # To create multiple files, pass kwargs accordingly.
+                pytester.maketxtfile(custom="foobar")
+                # At this point, both 'test_something.txt' & 'custom.txt' exist in the test directory.
+
+        """
+        return self._makefile(".txt", args, kwargs)
+
+    def syspathinsert(
+        self, path: Optional[Union[str, "os.PathLike[str]"]] = None
+    ) -> None:
+        """Prepend a directory to sys.path, defaults to :attr:`path`.
+
+        This is undone automatically when this object dies at the end of each
+        test.
+
+        :param path:
+            The path.
+        """
+        if path is None:
+            path = self.path
+
+        self._monkeypatch.syspath_prepend(str(path))
+
+    def mkdir(self, name: Union[str, "os.PathLike[str]"]) -> Path:
+        """Create a new (sub)directory.
+
+        :param name:
+            The name of the directory, relative to the pytester path.
+        :returns:
+            The created directory.
+        """
+        p = self.path / name
+        p.mkdir()
+        return p
+
+    def mkpydir(self, name: Union[str, "os.PathLike[str]"]) -> Path:
+        """Create a new python package.
+
+        This creates a (sub)directory with an empty ``__init__.py`` file so it
+        gets recognised as a Python package.
+        """
+        p = self.path / name
+        p.mkdir()
+        p.joinpath("__init__.py").touch()
+        return p
+
+    def copy_example(self, name: Optional[str] = None) -> Path:
+        """Copy file from project's directory into the testdir.
+
+        :param name:
+            The name of the file to copy.
+        :return:
+            Path to the copied directory (inside ``self.path``).
+        """
+        example_dir_ = self._request.config.getini("pytester_example_dir")
+        if example_dir_ is None:
+            raise ValueError("pytester_example_dir is unset, can't copy examples")
+        example_dir: Path = self._request.config.rootpath / example_dir_
+
+        for extra_element in self._request.node.iter_markers("pytester_example_path"):
+            assert extra_element.args
+            example_dir = example_dir.joinpath(*extra_element.args)
+
+        if name is None:
+            func_name = self._name
+            maybe_dir = example_dir / func_name
+            maybe_file = example_dir / (func_name + ".py")
+
+            if maybe_dir.is_dir():
+                example_path = maybe_dir
+            elif maybe_file.is_file():
+                example_path = maybe_file
+            else:
+                raise LookupError(
+                    f"{func_name} can't be found as module or package in {example_dir}"
+                )
+        else:
+            example_path = example_dir.joinpath(name)
+
+        if example_path.is_dir() and not example_path.joinpath("__init__.py").is_file():
+            copytree(example_path, self.path)
+            return self.path
+        elif example_path.is_file():
+            result = self.path.joinpath(example_path.name)
+            shutil.copy(example_path, result)
+            return result
+        else:
+            raise LookupError(
+                f'example "{example_path}" is not found as a file or directory'
+            )
+
+    def getnode(
+        self, config: Config, arg: Union[str, "os.PathLike[str]"]
+    ) -> Union[Collector, Item]:
+        """Get the collection node of a file.
+
+        :param config:
+           A pytest config.
+           See :py:meth:`parseconfig` and :py:meth:`parseconfigure` for creating it.
+        :param arg:
+            Path to the file.
+        :returns:
+            The node.
+        """
+        session = Session.from_config(config)
+        assert "::" not in str(arg)
+        p = Path(os.path.abspath(arg))
+        config.hook.pytest_sessionstart(session=session)
+        res = session.perform_collect([str(p)], genitems=False)[0]
+        config.hook.pytest_sessionfinish(session=session, exitstatus=ExitCode.OK)
+        return res
+
+    def getpathnode(
+        self, path: Union[str, "os.PathLike[str]"]
+    ) -> Union[Collector, Item]:
+        """Return the collection node of a file.
+
+        This is like :py:meth:`getnode` but uses :py:meth:`parseconfigure` to
+        create the (configured) pytest Config instance.
+
+        :param path:
+            Path to the file.
+        :returns:
+            The node.
+        """
+        path = Path(path)
+        config = self.parseconfigure(path)
+        session = Session.from_config(config)
+        x = bestrelpath(session.path, path)
+        config.hook.pytest_sessionstart(session=session)
+        res = session.perform_collect([x], genitems=False)[0]
+        config.hook.pytest_sessionfinish(session=session, exitstatus=ExitCode.OK)
+        return res
+
+    def genitems(self, colitems: Sequence[Union[Item, Collector]]) -> List[Item]:
+        """Generate all test items from a collection node.
+
+        This recurses into the collection node and returns a list of all the
+        test items contained within.
+
+        :param colitems:
+            The collection nodes.
+        :returns:
+            The collected items.
+        """
+        session = colitems[0].session
+        result: List[Item] = []
+        for colitem in colitems:
+            result.extend(session.genitems(colitem))
+        return result
+
+    def runitem(self, source: str) -> Any:
+        """Run the "test_func" Item.
+
+        The calling test instance (class containing the test method) must
+        provide a ``.getrunner()`` method which should return a runner which
+        can run the test protocol for a single item, e.g.
+        :py:func:`_pytest.runner.runtestprotocol`.
+        """
+        # used from runner functional tests
+        item = self.getitem(source)
+        # the test class where we are called from wants to provide the runner
+        testclassinstance = self._request.instance
+        runner = testclassinstance.getrunner()
+        return runner(item)
+
+    def inline_runsource(self, source: str, *cmdlineargs) -> HookRecorder:
+        """Run a test module in process using ``pytest.main()``.
+
+        This run writes "source" into a temporary file and runs
+        ``pytest.main()`` on it, returning a :py:class:`HookRecorder` instance
+        for the result.
+
+        :param source: The source code of the test module.
+        :param cmdlineargs: Any extra command line arguments to use.
+        """
+        p = self.makepyfile(source)
+        values = list(cmdlineargs) + [p]
+        return self.inline_run(*values)
+
+    def inline_genitems(self, *args) -> Tuple[List[Item], HookRecorder]:
+        """Run ``pytest.main(['--collectonly'])`` in-process.
+
+        Runs the :py:func:`pytest.main` function to run all of pytest inside
+        the test process itself like :py:meth:`inline_run`, but returns a
+        tuple of the collected items and a :py:class:`HookRecorder` instance.
+        """
+        rec = self.inline_run("--collect-only", *args)
+        items = [x.item for x in rec.getcalls("pytest_itemcollected")]
+        return items, rec
+
+    def inline_run(
+        self,
+        *args: Union[str, "os.PathLike[str]"],
+        plugins=(),
+        no_reraise_ctrlc: bool = False,
+    ) -> HookRecorder:
+        """Run ``pytest.main()`` in-process, returning a HookRecorder.
+
+        Runs the :py:func:`pytest.main` function to run all of pytest inside
+        the test process itself.  This means it can return a
+        :py:class:`HookRecorder` instance which gives more detailed results
+        from that run than can be done by matching stdout/stderr from
+        :py:meth:`runpytest`.
+
+        :param args:
+            Command line arguments to pass to :py:func:`pytest.main`.
+        :param plugins:
+            Extra plugin instances the ``pytest.main()`` instance should use.
+        :param no_reraise_ctrlc:
+            Typically we reraise keyboard interrupts from the child run. If
+            True, the KeyboardInterrupt exception is captured.
+        """
+        # (maybe a cpython bug?) the importlib cache sometimes isn't updated
+        # properly between file creation and inline_run (especially if imports
+        # are interspersed with file creation)
+        importlib.invalidate_caches()
+
+        plugins = list(plugins)
+        finalizers = []
+        try:
+            # Any sys.module or sys.path changes done while running pytest
+            # inline should be reverted after the test run completes to avoid
+            # clashing with later inline tests run within the same pytest test,
+            # e.g. just because they use matching test module names.
+            finalizers.append(self.__take_sys_modules_snapshot().restore)
+            finalizers.append(SysPathsSnapshot().restore)
+
+            # Important note:
+            # - our tests should not leave any other references/registrations
+            #   laying around other than possibly loaded test modules
+            #   referenced from sys.modules, as nothing will clean those up
+            #   automatically
+
+            rec = []
+
+            class Collect:
+                def pytest_configure(x, config: Config) -> None:
+                    rec.append(self.make_hook_recorder(config.pluginmanager))
+
+            plugins.append(Collect())
+            ret = main([str(x) for x in args], plugins=plugins)
+            if len(rec) == 1:
+                reprec = rec.pop()
+            else:
+
+                class reprec:  # type: ignore
+                    pass
+
+            reprec.ret = ret
+
+            # Typically we reraise keyboard interrupts from the child run
+            # because it's our user requesting interruption of the testing.
+            if ret == ExitCode.INTERRUPTED and not no_reraise_ctrlc:
+                calls = reprec.getcalls("pytest_keyboard_interrupt")
+                if calls and calls[-1].excinfo.type == KeyboardInterrupt:
+                    raise KeyboardInterrupt()
+            return reprec
+        finally:
+            for finalizer in finalizers:
+                finalizer()
+
+    def runpytest_inprocess(
+        self, *args: Union[str, "os.PathLike[str]"], **kwargs: Any
+    ) -> RunResult:
+        """Return result of running pytest in-process, providing a similar
+        interface to what self.runpytest() provides."""
+        syspathinsert = kwargs.pop("syspathinsert", False)
+
+        if syspathinsert:
+            self.syspathinsert()
+        now = timing.time()
+        capture = _get_multicapture("sys")
+        capture.start_capturing()
+        try:
+            try:
+                reprec = self.inline_run(*args, **kwargs)
+            except SystemExit as e:
+                ret = e.args[0]
+                try:
+                    ret = ExitCode(e.args[0])
+                except ValueError:
+                    pass
+
+                class reprec:  # type: ignore
+                    ret = ret
+
+            except Exception:
+                traceback.print_exc()
+
+                class reprec:  # type: ignore
+                    ret = ExitCode(3)
+
+        finally:
+            out, err = capture.readouterr()
+            capture.stop_capturing()
+            sys.stdout.write(out)
+            sys.stderr.write(err)
+
+        assert reprec.ret is not None
+        res = RunResult(
+            reprec.ret, out.splitlines(), err.splitlines(), timing.time() - now
+        )
+        res.reprec = reprec  # type: ignore
+        return res
+
+    def runpytest(
+        self, *args: Union[str, "os.PathLike[str]"], **kwargs: Any
+    ) -> RunResult:
+        """Run pytest inline or in a subprocess, depending on the command line
+        option "--runpytest" and return a :py:class:`~pytest.RunResult`."""
+        new_args = self._ensure_basetemp(args)
+        if self._method == "inprocess":
+            return self.runpytest_inprocess(*new_args, **kwargs)
+        elif self._method == "subprocess":
+            return self.runpytest_subprocess(*new_args, **kwargs)
+        raise RuntimeError(f"Unrecognized runpytest option: {self._method}")
+
+    def _ensure_basetemp(
+        self, args: Sequence[Union[str, "os.PathLike[str]"]]
+    ) -> List[Union[str, "os.PathLike[str]"]]:
+        new_args = list(args)
+        for x in new_args:
+            if str(x).startswith("--basetemp"):
+                break
+        else:
+            new_args.append("--basetemp=%s" % self.path.parent.joinpath("basetemp"))
+        return new_args
+
+    def parseconfig(self, *args: Union[str, "os.PathLike[str]"]) -> Config:
+        """Return a new pytest :class:`pytest.Config` instance from given
+        commandline args.
+
+        This invokes the pytest bootstrapping code in _pytest.config to create a
+        new :py:class:`pytest.PytestPluginManager` and call the
+        :hook:`pytest_cmdline_parse` hook to create a new :class:`pytest.Config`
+        instance.
+
+        If :attr:`plugins` has been populated they should be plugin modules
+        to be registered with the plugin manager.
+        """
+        import _pytest.config
+
+        new_args = self._ensure_basetemp(args)
+        new_args = [str(x) for x in new_args]
+
+        config = _pytest.config._prepareconfig(new_args, self.plugins)  # type: ignore[arg-type]
+        # we don't know what the test will do with this half-setup config
+        # object and thus we make sure it gets unconfigured properly in any
+        # case (otherwise capturing could still be active, for example)
+        self._request.addfinalizer(config._ensure_unconfigure)
+        return config
+
+    def parseconfigure(self, *args: Union[str, "os.PathLike[str]"]) -> Config:
+        """Return a new pytest configured Config instance.
+
+        Returns a new :py:class:`pytest.Config` instance like
+        :py:meth:`parseconfig`, but also calls the :hook:`pytest_configure`
+        hook.
+        """
+        config = self.parseconfig(*args)
+        config._do_configure()
+        return config
+
+    def getitem(
+        self, source: Union[str, "os.PathLike[str]"], funcname: str = "test_func"
+    ) -> Item:
+        """Return the test item for a test function.
+
+        Writes the source to a python file and runs pytest's collection on
+        the resulting module, returning the test item for the requested
+        function name.
+
+        :param source:
+            The module source.
+        :param funcname:
+            The name of the test function for which to return a test item.
+        :returns:
+            The test item.
+        """
+        items = self.getitems(source)
+        for item in items:
+            if item.name == funcname:
+                return item
+        assert 0, "{!r} item not found in module:\n{}\nitems: {}".format(
+            funcname, source, items
+        )
+
+    def getitems(self, source: Union[str, "os.PathLike[str]"]) -> List[Item]:
+        """Return all test items collected from the module.
+
+        Writes the source to a Python file and runs pytest's collection on
+        the resulting module, returning all test items contained within.
+        """
+        modcol = self.getmodulecol(source)
+        return self.genitems([modcol])
+
+    def getmodulecol(
+        self,
+        source: Union[str, "os.PathLike[str]"],
+        configargs=(),
+        *,
+        withinit: bool = False,
+    ):
+        """Return the module collection node for ``source``.
+
+        Writes ``source`` to a file using :py:meth:`makepyfile` and then
+        runs the pytest collection on it, returning the collection node for the
+        test module.
+
+        :param source:
+            The source code of the module to collect.
+
+        :param configargs:
+            Any extra arguments to pass to :py:meth:`parseconfigure`.
+
+        :param withinit:
+            Whether to also write an ``__init__.py`` file to the same
+            directory to ensure it is a package.
+        """
+        if isinstance(source, os.PathLike):
+            path = self.path.joinpath(source)
+            assert not withinit, "not supported for paths"
+        else:
+            kw = {self._name: str(source)}
+            path = self.makepyfile(**kw)
+        if withinit:
+            self.makepyfile(__init__="#")
+        self.config = config = self.parseconfigure(path, *configargs)
+        return self.getnode(config, path)
+
+    def collect_by_name(
+        self, modcol: Collector, name: str
+    ) -> Optional[Union[Item, Collector]]:
+        """Return the collection node for name from the module collection.
+
+        Searches a module collection node for a collection node matching the
+        given name.
+
+        :param modcol: A module collection node; see :py:meth:`getmodulecol`.
+        :param name: The name of the node to return.
+        """
+        if modcol not in self._mod_collections:
+            self._mod_collections[modcol] = list(modcol.collect())
+        for colitem in self._mod_collections[modcol]:
+            if colitem.name == name:
+                return colitem
+        return None
+
+    def popen(
+        self,
+        cmdargs: Sequence[Union[str, "os.PathLike[str]"]],
+        stdout: Union[int, TextIO] = subprocess.PIPE,
+        stderr: Union[int, TextIO] = subprocess.PIPE,
+        stdin: Union[NotSetType, bytes, IO[Any], int] = CLOSE_STDIN,
+        **kw,
+    ):
+        """Invoke :py:class:`subprocess.Popen`.
+
+        Calls :py:class:`subprocess.Popen` making sure the current working
+        directory is in ``PYTHONPATH``.
+
+        You probably want to use :py:meth:`run` instead.
+        """
+        env = os.environ.copy()
+        env["PYTHONPATH"] = os.pathsep.join(
+            filter(None, [os.getcwd(), env.get("PYTHONPATH", "")])
+        )
+        kw["env"] = env
+
+        if stdin is self.CLOSE_STDIN:
+            kw["stdin"] = subprocess.PIPE
+        elif isinstance(stdin, bytes):
+            kw["stdin"] = subprocess.PIPE
+        else:
+            kw["stdin"] = stdin
+
+        popen = subprocess.Popen(cmdargs, stdout=stdout, stderr=stderr, **kw)
+        if stdin is self.CLOSE_STDIN:
+            assert popen.stdin is not None
+            popen.stdin.close()
+        elif isinstance(stdin, bytes):
+            assert popen.stdin is not None
+            popen.stdin.write(stdin)
+
+        return popen
+
+    def run(
+        self,
+        *cmdargs: Union[str, "os.PathLike[str]"],
+        timeout: Optional[float] = None,
+        stdin: Union[NotSetType, bytes, IO[Any], int] = CLOSE_STDIN,
+    ) -> RunResult:
+        """Run a command with arguments.
+
+        Run a process using :py:class:`subprocess.Popen` saving the stdout and
+        stderr.
+
+        :param cmdargs:
+            The sequence of arguments to pass to :py:class:`subprocess.Popen`,
+            with path-like objects being converted to :py:class:`str`
+            automatically.
+        :param timeout:
+            The period in seconds after which to timeout and raise
+            :py:class:`Pytester.TimeoutExpired`.
+        :param stdin:
+            Optional standard input.
+
+            - If it is :py:attr:`CLOSE_STDIN` (Default), then this method calls
+              :py:class:`subprocess.Popen` with ``stdin=subprocess.PIPE``, and
+              the standard input is closed immediately after the new command is
+              started.
+
+            - If it is of type :py:class:`bytes`, these bytes are sent to the
+              standard input of the command.
+
+            - Otherwise, it is passed through to :py:class:`subprocess.Popen`.
+              For further information in this case, consult the document of the
+              ``stdin`` parameter in :py:class:`subprocess.Popen`.
+        :returns:
+            The result.
+        """
+        __tracebackhide__ = True
+
+        cmdargs = tuple(os.fspath(arg) for arg in cmdargs)
+        p1 = self.path.joinpath("stdout")
+        p2 = self.path.joinpath("stderr")
+        print("running:", *cmdargs)
+        print("     in:", Path.cwd())
+
+        with p1.open("w", encoding="utf8") as f1, p2.open("w", encoding="utf8") as f2:
+            now = timing.time()
+            popen = self.popen(
+                cmdargs,
+                stdin=stdin,
+                stdout=f1,
+                stderr=f2,
+                close_fds=(sys.platform != "win32"),
+            )
+            if popen.stdin is not None:
+                popen.stdin.close()
+
+            def handle_timeout() -> None:
+                __tracebackhide__ = True
+
+                timeout_message = (
+                    "{seconds} second timeout expired running:"
+                    " {command}".format(seconds=timeout, command=cmdargs)
+                )
+
+                popen.kill()
+                popen.wait()
+                raise self.TimeoutExpired(timeout_message)
+
+            if timeout is None:
+                ret = popen.wait()
+            else:
+                try:
+                    ret = popen.wait(timeout)
+                except subprocess.TimeoutExpired:
+                    handle_timeout()
+
+        with p1.open(encoding="utf8") as f1, p2.open(encoding="utf8") as f2:
+            out = f1.read().splitlines()
+            err = f2.read().splitlines()
+
+        self._dump_lines(out, sys.stdout)
+        self._dump_lines(err, sys.stderr)
+
+        with contextlib.suppress(ValueError):
+            ret = ExitCode(ret)
+        return RunResult(ret, out, err, timing.time() - now)
+
+    def _dump_lines(self, lines, fp):
+        try:
+            for line in lines:
+                print(line, file=fp)
+        except UnicodeEncodeError:
+            print(f"couldn't print to {fp} because of encoding")
+
+    def _getpytestargs(self) -> Tuple[str, ...]:
+        return sys.executable, "-mpytest"
+
+    def runpython(self, script: "os.PathLike[str]") -> RunResult:
+        """Run a python script using sys.executable as interpreter."""
+        return self.run(sys.executable, script)
+
+    def runpython_c(self, command: str) -> RunResult:
+        """Run ``python -c "command"``."""
+        return self.run(sys.executable, "-c", command)
+
+    def runpytest_subprocess(
+        self, *args: Union[str, "os.PathLike[str]"], timeout: Optional[float] = None
+    ) -> RunResult:
+        """Run pytest as a subprocess with given arguments.
+
+        Any plugins added to the :py:attr:`plugins` list will be added using the
+        ``-p`` command line option.  Additionally ``--basetemp`` is used to put
+        any temporary files and directories in a numbered directory prefixed
+        with "runpytest-" to not conflict with the normal numbered pytest
+        location for temporary files and directories.
+
+        :param args:
+            The sequence of arguments to pass to the pytest subprocess.
+        :param timeout:
+            The period in seconds after which to timeout and raise
+            :py:class:`Pytester.TimeoutExpired`.
+        :returns:
+            The result.
+        """
+        __tracebackhide__ = True
+        p = make_numbered_dir(root=self.path, prefix="runpytest-", mode=0o700)
+        args = ("--basetemp=%s" % p,) + args
+        plugins = [x for x in self.plugins if isinstance(x, str)]
+        if plugins:
+            args = ("-p", plugins[0]) + args
+        args = self._getpytestargs() + args
+        return self.run(*args, timeout=timeout)
+
+    def spawn_pytest(
+        self, string: str, expect_timeout: float = 10.0
+    ) -> "pexpect.spawn":
+        """Run pytest using pexpect.
+
+        This makes sure to use the right pytest and sets up the temporary
+        directory locations.
+
+        The pexpect child is returned.
+        """
+        basetemp = self.path / "temp-pexpect"
+        basetemp.mkdir(mode=0o700)
+        invoke = " ".join(map(str, self._getpytestargs()))
+        cmd = f"{invoke} --basetemp={basetemp} {string}"
+        return self.spawn(cmd, expect_timeout=expect_timeout)
+
+    def spawn(self, cmd: str, expect_timeout: float = 10.0) -> "pexpect.spawn":
+        """Run a command using pexpect.
+
+        The pexpect child is returned.
+        """
+        pexpect = importorskip("pexpect", "3.0")
+        if hasattr(sys, "pypy_version_info") and "64" in platform.machine():
+            skip("pypy-64 bit not supported")
+        if not hasattr(pexpect, "spawn"):
+            skip("pexpect.spawn not available")
+        logfile = self.path.joinpath("spawn.out").open("wb")
+
+        child = pexpect.spawn(cmd, logfile=logfile, timeout=expect_timeout)
+        self._request.addfinalizer(logfile.close)
+        return child
+
+
+class LineComp:
+    def __init__(self) -> None:
+        self.stringio = StringIO()
+        """:class:`python:io.StringIO()` instance used for input."""
+
+    def assert_contains_lines(self, lines2: Sequence[str]) -> None:
+        """Assert that ``lines2`` are contained (linearly) in :attr:`stringio`'s value.
+
+        Lines are matched using :func:`LineMatcher.fnmatch_lines <pytest.LineMatcher.fnmatch_lines>`.
+        """
+        __tracebackhide__ = True
+        val = self.stringio.getvalue()
+        self.stringio.truncate(0)
+        self.stringio.seek(0)
+        lines1 = val.split("\n")
+        LineMatcher(lines1).fnmatch_lines(lines2)
+
+
+class LineMatcher:
+    """Flexible matching of text.
+
+    This is a convenience class to test large texts like the output of
+    commands.
+
+    The constructor takes a list of lines without their trailing newlines, i.e.
+    ``text.splitlines()``.
+    """
+
+    def __init__(self, lines: List[str]) -> None:
+        self.lines = lines
+        self._log_output: List[str] = []
+
+    def __str__(self) -> str:
+        """Return the entire original text.
+
+        .. versionadded:: 6.2
+            You can use :meth:`str` in older versions.
+        """
+        return "\n".join(self.lines)
+
+    def _getlines(self, lines2: Union[str, Sequence[str], Source]) -> Sequence[str]:
+        if isinstance(lines2, str):
+            lines2 = Source(lines2)
+        if isinstance(lines2, Source):
+            lines2 = lines2.strip().lines
+        return lines2
+
+    def fnmatch_lines_random(self, lines2: Sequence[str]) -> None:
+        """Check lines exist in the output in any order (using :func:`python:fnmatch.fnmatch`)."""
+        __tracebackhide__ = True
+        self._match_lines_random(lines2, fnmatch)
+
+    def re_match_lines_random(self, lines2: Sequence[str]) -> None:
+        """Check lines exist in the output in any order (using :func:`python:re.match`)."""
+        __tracebackhide__ = True
+        self._match_lines_random(lines2, lambda name, pat: bool(re.match(pat, name)))
+
+    def _match_lines_random(
+        self, lines2: Sequence[str], match_func: Callable[[str, str], bool]
+    ) -> None:
+        __tracebackhide__ = True
+        lines2 = self._getlines(lines2)
+        for line in lines2:
+            for x in self.lines:
+                if line == x or match_func(x, line):
+                    self._log("matched: ", repr(line))
+                    break
+            else:
+                msg = "line %r not found in output" % line
+                self._log(msg)
+                self._fail(msg)
+
+    def get_lines_after(self, fnline: str) -> Sequence[str]:
+        """Return all lines following the given line in the text.
+
+        The given line can contain glob wildcards.
+        """
+        for i, line in enumerate(self.lines):
+            if fnline == line or fnmatch(line, fnline):
+                return self.lines[i + 1 :]
+        raise ValueError("line %r not found in output" % fnline)
+
+    def _log(self, *args) -> None:
+        self._log_output.append(" ".join(str(x) for x in args))
+
+    @property
+    def _log_text(self) -> str:
+        return "\n".join(self._log_output)
+
+    def fnmatch_lines(
+        self, lines2: Sequence[str], *, consecutive: bool = False
+    ) -> None:
+        """Check lines exist in the output (using :func:`python:fnmatch.fnmatch`).
+
+        The argument is a list of lines which have to match and can use glob
+        wildcards.  If they do not match a pytest.fail() is called.  The
+        matches and non-matches are also shown as part of the error message.
+
+        :param lines2: String patterns to match.
+        :param consecutive: Match lines consecutively?
+        """
+        __tracebackhide__ = True
+        self._match_lines(lines2, fnmatch, "fnmatch", consecutive=consecutive)
+
+    def re_match_lines(
+        self, lines2: Sequence[str], *, consecutive: bool = False
+    ) -> None:
+        """Check lines exist in the output (using :func:`python:re.match`).
+
+        The argument is a list of lines which have to match using ``re.match``.
+        If they do not match a pytest.fail() is called.
+
+        The matches and non-matches are also shown as part of the error message.
+
+        :param lines2: string patterns to match.
+        :param consecutive: match lines consecutively?
+        """
+        __tracebackhide__ = True
+        self._match_lines(
+            lines2,
+            lambda name, pat: bool(re.match(pat, name)),
+            "re.match",
+            consecutive=consecutive,
+        )
+
+    def _match_lines(
+        self,
+        lines2: Sequence[str],
+        match_func: Callable[[str, str], bool],
+        match_nickname: str,
+        *,
+        consecutive: bool = False,
+    ) -> None:
+        """Underlying implementation of ``fnmatch_lines`` and ``re_match_lines``.
+
+        :param Sequence[str] lines2:
+            List of string patterns to match. The actual format depends on
+            ``match_func``.
+        :param match_func:
+            A callable ``match_func(line, pattern)`` where line is the
+            captured line from stdout/stderr and pattern is the matching
+            pattern.
+        :param str match_nickname:
+            The nickname for the match function that will be logged to stdout
+            when a match occurs.
+        :param consecutive:
+            Match lines consecutively?
+        """
+        if not isinstance(lines2, collections.abc.Sequence):
+            raise TypeError(f"invalid type for lines2: {type(lines2).__name__}")
+        lines2 = self._getlines(lines2)
+        lines1 = self.lines[:]
+        extralines = []
+        __tracebackhide__ = True
+        wnick = len(match_nickname) + 1
+        started = False
+        for line in lines2:
+            nomatchprinted = False
+            while lines1:
+                nextline = lines1.pop(0)
+                if line == nextline:
+                    self._log("exact match:", repr(line))
+                    started = True
+                    break
+                elif match_func(nextline, line):
+                    self._log("%s:" % match_nickname, repr(line))
+                    self._log(
+                        "{:>{width}}".format("with:", width=wnick), repr(nextline)
+                    )
+                    started = True
+                    break
+                else:
+                    if consecutive and started:
+                        msg = f"no consecutive match: {line!r}"
+                        self._log(msg)
+                        self._log(
+                            "{:>{width}}".format("with:", width=wnick), repr(nextline)
+                        )
+                        self._fail(msg)
+                    if not nomatchprinted:
+                        self._log(
+                            "{:>{width}}".format("nomatch:", width=wnick), repr(line)
+                        )
+                        nomatchprinted = True
+                    self._log("{:>{width}}".format("and:", width=wnick), repr(nextline))
+                extralines.append(nextline)
+            else:
+                msg = f"remains unmatched: {line!r}"
+                self._log(msg)
+                self._fail(msg)
+        self._log_output = []
+
+    def no_fnmatch_line(self, pat: str) -> None:
+        """Ensure captured lines do not match the given pattern, using ``fnmatch.fnmatch``.
+
+        :param str pat: The pattern to match lines.
+        """
+        __tracebackhide__ = True
+        self._no_match_line(pat, fnmatch, "fnmatch")
+
+    def no_re_match_line(self, pat: str) -> None:
+        """Ensure captured lines do not match the given pattern, using ``re.match``.
+
+        :param str pat: The regular expression to match lines.
+        """
+        __tracebackhide__ = True
+        self._no_match_line(
+            pat, lambda name, pat: bool(re.match(pat, name)), "re.match"
+        )
+
+    def _no_match_line(
+        self, pat: str, match_func: Callable[[str, str], bool], match_nickname: str
+    ) -> None:
+        """Ensure captured lines does not have a the given pattern, using ``fnmatch.fnmatch``.
+
+        :param str pat: The pattern to match lines.
+        """
+        __tracebackhide__ = True
+        nomatch_printed = False
+        wnick = len(match_nickname) + 1
+        for line in self.lines:
+            if match_func(line, pat):
+                msg = f"{match_nickname}: {pat!r}"
+                self._log(msg)
+                self._log("{:>{width}}".format("with:", width=wnick), repr(line))
+                self._fail(msg)
+            else:
+                if not nomatch_printed:
+                    self._log("{:>{width}}".format("nomatch:", width=wnick), repr(pat))
+                    nomatch_printed = True
+                self._log("{:>{width}}".format("and:", width=wnick), repr(line))
+        self._log_output = []
+
+    def _fail(self, msg: str) -> None:
+        __tracebackhide__ = True
+        log_text = self._log_text
+        self._log_output = []
+        fail(log_text)
+
+    def str(self) -> str:
+        """Return the entire original text."""
+        return str(self)
diff --git a/contrib/python/pytest/py3/_pytest/pytester_assertions.py b/contrib/python/pytest/py3/_pytest/pytester_assertions.py
new file mode 100644
index 0000000000..657e4db5fc
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/pytester_assertions.py
@@ -0,0 +1,75 @@
+"""Helper plugin for pytester; should not be loaded on its own."""
+# This plugin contains assertions used by pytester. pytester cannot
+# contain them itself, since it is imported by the `pytest` module,
+# hence cannot be subject to assertion rewriting, which requires a
+# module to not be already imported.
+from typing import Dict
+from typing import Optional
+from typing import Sequence
+from typing import Tuple
+from typing import Union
+
+from _pytest.reports import CollectReport
+from _pytest.reports import TestReport
+
+
+def assertoutcome(
+    outcomes: Tuple[
+        Sequence[TestReport],
+        Sequence[Union[CollectReport, TestReport]],
+        Sequence[Union[CollectReport, TestReport]],
+    ],
+    passed: int = 0,
+    skipped: int = 0,
+    failed: int = 0,
+) -> None:
+    __tracebackhide__ = True
+
+    realpassed, realskipped, realfailed = outcomes
+    obtained = {
+        "passed": len(realpassed),
+        "skipped": len(realskipped),
+        "failed": len(realfailed),
+    }
+    expected = {"passed": passed, "skipped": skipped, "failed": failed}
+    assert obtained == expected, outcomes
+
+
+def assert_outcomes(
+    outcomes: Dict[str, int],
+    passed: int = 0,
+    skipped: int = 0,
+    failed: int = 0,
+    errors: int = 0,
+    xpassed: int = 0,
+    xfailed: int = 0,
+    warnings: Optional[int] = None,
+    deselected: Optional[int] = None,
+) -> None:
+    """Assert that the specified outcomes appear with the respective
+    numbers (0 means it didn't occur) in the text output from a test run."""
+    __tracebackhide__ = True
+
+    obtained = {
+        "passed": outcomes.get("passed", 0),
+        "skipped": outcomes.get("skipped", 0),
+        "failed": outcomes.get("failed", 0),
+        "errors": outcomes.get("errors", 0),
+        "xpassed": outcomes.get("xpassed", 0),
+        "xfailed": outcomes.get("xfailed", 0),
+    }
+    expected = {
+        "passed": passed,
+        "skipped": skipped,
+        "failed": failed,
+        "errors": errors,
+        "xpassed": xpassed,
+        "xfailed": xfailed,
+    }
+    if warnings is not None:
+        obtained["warnings"] = outcomes.get("warnings", 0)
+        expected["warnings"] = warnings
+    if deselected is not None:
+        obtained["deselected"] = outcomes.get("deselected", 0)
+        expected["deselected"] = deselected
+    assert obtained == expected
diff --git a/contrib/python/pytest/py3/_pytest/python.py b/contrib/python/pytest/py3/_pytest/python.py
new file mode 100644
index 0000000000..8b9dd9d1a5
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/python.py
@@ -0,0 +1,1856 @@
+"""Python test discovery, setup and run of test functions."""
+import dataclasses
+import enum
+import fnmatch
+import inspect
+import itertools
+import os
+import sys
+import types
+import warnings
+from collections import Counter
+from collections import defaultdict
+from functools import partial
+from pathlib import Path
+from typing import Any
+from typing import Callable
+from typing import Dict
+from typing import Generator
+from typing import Iterable
+from typing import Iterator
+from typing import List
+from typing import Mapping
+from typing import Optional
+from typing import Pattern
+from typing import Sequence
+from typing import Set
+from typing import Tuple
+from typing import TYPE_CHECKING
+from typing import Union
+
+import _pytest
+from _pytest import fixtures
+from _pytest import nodes
+from _pytest._code import filter_traceback
+from _pytest._code import getfslineno
+from _pytest._code.code import ExceptionInfo
+from _pytest._code.code import TerminalRepr
+from _pytest._code.code import Traceback
+from _pytest._io import TerminalWriter
+from _pytest._io.saferepr import saferepr
+from _pytest.compat import ascii_escaped
+from _pytest.compat import assert_never
+from _pytest.compat import final
+from _pytest.compat import get_default_arg_names
+from _pytest.compat import get_real_func
+from _pytest.compat import getimfunc
+from _pytest.compat import getlocation
+from _pytest.compat import is_async_function
+from _pytest.compat import is_generator
+from _pytest.compat import LEGACY_PATH
+from _pytest.compat import NOTSET
+from _pytest.compat import safe_getattr
+from _pytest.compat import safe_isclass
+from _pytest.compat import STRING_TYPES
+from _pytest.config import Config
+from _pytest.config import ExitCode
+from _pytest.config import hookimpl
+from _pytest.config.argparsing import Parser
+from _pytest.deprecated import check_ispytest
+from _pytest.deprecated import INSTANCE_COLLECTOR
+from _pytest.deprecated import NOSE_SUPPORT_METHOD
+from _pytest.fixtures import FuncFixtureInfo
+from _pytest.main import Session
+from _pytest.mark import MARK_GEN
+from _pytest.mark import ParameterSet
+from _pytest.mark.structures import get_unpacked_marks
+from _pytest.mark.structures import Mark
+from _pytest.mark.structures import MarkDecorator
+from _pytest.mark.structures import normalize_mark_list
+from _pytest.outcomes import fail
+from _pytest.outcomes import skip
+from _pytest.pathlib import bestrelpath
+from _pytest.pathlib import fnmatch_ex
+from _pytest.pathlib import import_path
+from _pytest.pathlib import ImportPathMismatchError
+from _pytest.pathlib import parts
+from _pytest.pathlib import visit
+from _pytest.scope import Scope
+from _pytest.warning_types import PytestCollectionWarning
+from _pytest.warning_types import PytestReturnNotNoneWarning
+from _pytest.warning_types import PytestUnhandledCoroutineWarning
+
+if TYPE_CHECKING:
+    from typing_extensions import Literal
+
+    from _pytest.scope import _ScopeName
+
+
+_PYTEST_DIR = Path(_pytest.__file__).parent
+
+
+def pytest_addoption(parser: Parser) -> None:
+    group = parser.getgroup("general")
+    group.addoption(
+        "--fixtures",
+        "--funcargs",
+        action="store_true",
+        dest="showfixtures",
+        default=False,
+        help="Show available fixtures, sorted by plugin appearance "
+        "(fixtures with leading '_' are only shown with '-v')",
+    )
+    group.addoption(
+        "--fixtures-per-test",
+        action="store_true",
+        dest="show_fixtures_per_test",
+        default=False,
+        help="Show fixtures per test",
+    )
+    parser.addini(
+        "python_files",
+        type="args",
+        # NOTE: default is also used in AssertionRewritingHook.
+        default=["test_*.py", "*_test.py"],
+        help="Glob-style file patterns for Python test module discovery",
+    )
+    parser.addini(
+        "python_classes",
+        type="args",
+        default=["Test"],
+        help="Prefixes or glob names for Python test class discovery",
+    )
+    parser.addini(
+        "python_functions",
+        type="args",
+        default=["test"],
+        help="Prefixes or glob names for Python test function and method discovery",
+    )
+    parser.addini(
+        "disable_test_id_escaping_and_forfeit_all_rights_to_community_support",
+        type="bool",
+        default=False,
+        help="Disable string escape non-ASCII characters, might cause unwanted "
+        "side effects(use at your own risk)",
+    )
+
+
+def pytest_cmdline_main(config: Config) -> Optional[Union[int, ExitCode]]:
+    if config.option.showfixtures:
+        showfixtures(config)
+        return 0
+    if config.option.show_fixtures_per_test:
+        show_fixtures_per_test(config)
+        return 0
+    return None
+
+
+def pytest_generate_tests(metafunc: "Metafunc") -> None:
+    for marker in metafunc.definition.iter_markers(name="parametrize"):
+        metafunc.parametrize(*marker.args, **marker.kwargs, _param_mark=marker)
+
+
+def pytest_configure(config: Config) -> None:
+    config.addinivalue_line(
+        "markers",
+        "parametrize(argnames, argvalues): call a test function multiple "
+        "times passing in different arguments in turn. argvalues generally "
+        "needs to be a list of values if argnames specifies only one name "
+        "or a list of tuples of values if argnames specifies multiple names. "
+        "Example: @parametrize('arg1', [1,2]) would lead to two calls of the "
+        "decorated test function, one with arg1=1 and another with arg1=2."
+        "see https://docs.pytest.org/en/stable/how-to/parametrize.html for more info "
+        "and examples.",
+    )
+    config.addinivalue_line(
+        "markers",
+        "usefixtures(fixturename1, fixturename2, ...): mark tests as needing "
+        "all of the specified fixtures. see "
+        "https://docs.pytest.org/en/stable/explanation/fixtures.html#usefixtures ",
+    )
+
+
+def async_warn_and_skip(nodeid: str) -> None:
+    msg = "async def functions are not natively supported and have been skipped.\n"
+    msg += (
+        "You need to install a suitable plugin for your async framework, for example:\n"
+    )
+    msg += "  - anyio\n"
+    msg += "  - pytest-asyncio\n"
+    msg += "  - pytest-tornasync\n"
+    msg += "  - pytest-trio\n"
+    msg += "  - pytest-twisted"
+    warnings.warn(PytestUnhandledCoroutineWarning(msg.format(nodeid)))
+    skip(reason="async def function and no async plugin installed (see warnings)")
+
+
+@hookimpl(trylast=True)
+def pytest_pyfunc_call(pyfuncitem: "Function") -> Optional[object]:
+    testfunction = pyfuncitem.obj
+    if is_async_function(testfunction):
+        async_warn_and_skip(pyfuncitem.nodeid)
+    funcargs = pyfuncitem.funcargs
+    testargs = {arg: funcargs[arg] for arg in pyfuncitem._fixtureinfo.argnames}
+    result = testfunction(**testargs)
+    if hasattr(result, "__await__") or hasattr(result, "__aiter__"):
+        async_warn_and_skip(pyfuncitem.nodeid)
+    elif result is not None:
+        warnings.warn(
+            PytestReturnNotNoneWarning(
+                f"Expected None, but {pyfuncitem.nodeid} returned {result!r}, which will be an error in a "
+                "future version of pytest.  Did you mean to use `assert` instead of `return`?"
+            )
+        )
+    return True
+
+
+def pytest_collect_file(file_path: Path, parent: nodes.Collector) -> Optional["Module"]:
+    if file_path.suffix == ".py":
+        if not parent.session.isinitpath(file_path):
+            if not path_matches_patterns(
+                file_path, parent.config.getini("python_files") + ["__init__.py"]
+            ):
+                return None
+        ihook = parent.session.gethookproxy(file_path)
+        module: Module = ihook.pytest_pycollect_makemodule(
+            module_path=file_path, parent=parent
+        )
+        return module
+    return None
+
+
+def path_matches_patterns(path: Path, patterns: Iterable[str]) -> bool:
+    """Return whether path matches any of the patterns in the list of globs given."""
+    return any(fnmatch_ex(pattern, path) for pattern in patterns)
+
+
+def pytest_pycollect_makemodule(module_path: Path, parent) -> "Module":
+    if module_path.name == "__init__.py":
+        pkg: Package = Package.from_parent(parent, path=module_path)
+        return pkg
+    mod: Module = Module.from_parent(parent, path=module_path)
+    return mod
+
+
+@hookimpl(trylast=True)
+def pytest_pycollect_makeitem(
+    collector: Union["Module", "Class"], name: str, obj: object
+) -> Union[None, nodes.Item, nodes.Collector, List[Union[nodes.Item, nodes.Collector]]]:
+    assert isinstance(collector, (Class, Module)), type(collector)
+    # Nothing was collected elsewhere, let's do it here.
+    if safe_isclass(obj):
+        if collector.istestclass(obj, name):
+            klass: Class = Class.from_parent(collector, name=name, obj=obj)
+            return klass
+    elif collector.istestfunction(obj, name):
+        # mock seems to store unbound methods (issue473), normalize it.
+        obj = getattr(obj, "__func__", obj)
+        # We need to try and unwrap the function if it's a functools.partial
+        # or a functools.wrapped.
+        # We mustn't if it's been wrapped with mock.patch (python 2 only).
+        if not (inspect.isfunction(obj) or inspect.isfunction(get_real_func(obj))):
+            filename, lineno = getfslineno(obj)
+            warnings.warn_explicit(
+                message=PytestCollectionWarning(
+                    "cannot collect %r because it is not a function." % name
+                ),
+                category=None,
+                filename=str(filename),
+                lineno=lineno + 1,
+            )
+        elif getattr(obj, "__test__", True):
+            if is_generator(obj):
+                res: Function = Function.from_parent(collector, name=name)
+                reason = "yield tests were removed in pytest 4.0 - {name} will be ignored".format(
+                    name=name
+                )
+                res.add_marker(MARK_GEN.xfail(run=False, reason=reason))
+                res.warn(PytestCollectionWarning(reason))
+                return res
+            else:
+                return list(collector._genfunctions(name, obj))
+    return None
+
+
+class PyobjMixin(nodes.Node):
+    """this mix-in inherits from Node to carry over the typing information
+
+    as its intended to always mix in before a node
+    its position in the mro is unaffected"""
+
+    _ALLOW_MARKERS = True
+
+    @property
+    def module(self):
+        """Python module object this node was collected from (can be None)."""
+        node = self.getparent(Module)
+        return node.obj if node is not None else None
+
+    @property
+    def cls(self):
+        """Python class object this node was collected from (can be None)."""
+        node = self.getparent(Class)
+        return node.obj if node is not None else None
+
+    @property
+    def instance(self):
+        """Python instance object the function is bound to.
+
+        Returns None if not a test method, e.g. for a standalone test function,
+        a staticmethod, a class or a module.
+        """
+        node = self.getparent(Function)
+        return getattr(node.obj, "__self__", None) if node is not None else None
+
+    @property
+    def obj(self):
+        """Underlying Python object."""
+        obj = getattr(self, "_obj", None)
+        if obj is None:
+            self._obj = obj = self._getobj()
+            # XXX evil hack
+            # used to avoid Function marker duplication
+            if self._ALLOW_MARKERS:
+                self.own_markers.extend(get_unpacked_marks(self.obj))
+                # This assumes that `obj` is called before there is a chance
+                # to add custom keys to `self.keywords`, so no fear of overriding.
+                self.keywords.update((mark.name, mark) for mark in self.own_markers)
+        return obj
+
+    @obj.setter
+    def obj(self, value):
+        self._obj = value
+
+    def _getobj(self):
+        """Get the underlying Python object. May be overwritten by subclasses."""
+        # TODO: Improve the type of `parent` such that assert/ignore aren't needed.
+        assert self.parent is not None
+        obj = self.parent.obj  # type: ignore[attr-defined]
+        return getattr(obj, self.name)
+
+    def getmodpath(self, stopatmodule: bool = True, includemodule: bool = False) -> str:
+        """Return Python path relative to the containing module."""
+        chain = self.listchain()
+        chain.reverse()
+        parts = []
+        for node in chain:
+            name = node.name
+            if isinstance(node, Module):
+                name = os.path.splitext(name)[0]
+                if stopatmodule:
+                    if includemodule:
+                        parts.append(name)
+                    break
+            parts.append(name)
+        parts.reverse()
+        return ".".join(parts)
+
+    def reportinfo(self) -> Tuple[Union["os.PathLike[str]", str], Optional[int], str]:
+        # XXX caching?
+        obj = self.obj
+        compat_co_firstlineno = getattr(obj, "compat_co_firstlineno", None)
+        if isinstance(compat_co_firstlineno, int):
+            # nose compatibility
+            file_path = sys.modules[obj.__module__].__file__
+            assert file_path is not None
+            if file_path.endswith(".pyc"):
+                file_path = file_path[:-1]
+            path: Union["os.PathLike[str]", str] = file_path
+            lineno = compat_co_firstlineno
+        else:
+            path, lineno = getfslineno(obj)
+        modpath = self.getmodpath()
+        assert isinstance(lineno, int)
+        return path, lineno, modpath
+
+
+# As an optimization, these builtin attribute names are pre-ignored when
+# iterating over an object during collection -- the pytest_pycollect_makeitem
+# hook is not called for them.
+# fmt: off
+class _EmptyClass: pass  # noqa: E701
+IGNORED_ATTRIBUTES = frozenset.union(  # noqa: E305
+    frozenset(),
+    # Module.
+    dir(types.ModuleType("empty_module")),
+    # Some extra module attributes the above doesn't catch.
+    {"__builtins__", "__file__", "__cached__"},
+    # Class.
+    dir(_EmptyClass),
+    # Instance.
+    dir(_EmptyClass()),
+)
+del _EmptyClass
+# fmt: on
+
+
+class PyCollector(PyobjMixin, nodes.Collector):
+    def funcnamefilter(self, name: str) -> bool:
+        return self._matches_prefix_or_glob_option("python_functions", name)
+
+    def isnosetest(self, obj: object) -> bool:
+        """Look for the __test__ attribute, which is applied by the
+        @nose.tools.istest decorator.
+        """
+        # We explicitly check for "is True" here to not mistakenly treat
+        # classes with a custom __getattr__ returning something truthy (like a
+        # function) as test classes.
+        return safe_getattr(obj, "__test__", False) is True
+
+    def classnamefilter(self, name: str) -> bool:
+        return self._matches_prefix_or_glob_option("python_classes", name)
+
+    def istestfunction(self, obj: object, name: str) -> bool:
+        if self.funcnamefilter(name) or self.isnosetest(obj):
+            if isinstance(obj, (staticmethod, classmethod)):
+                # staticmethods and classmethods need to be unwrapped.
+                obj = safe_getattr(obj, "__func__", False)
+            return callable(obj) and fixtures.getfixturemarker(obj) is None
+        else:
+            return False
+
+    def istestclass(self, obj: object, name: str) -> bool:
+        return self.classnamefilter(name) or self.isnosetest(obj)
+
+    def _matches_prefix_or_glob_option(self, option_name: str, name: str) -> bool:
+        """Check if the given name matches the prefix or glob-pattern defined
+        in ini configuration."""
+        for option in self.config.getini(option_name):
+            if name.startswith(option):
+                return True
+            # Check that name looks like a glob-string before calling fnmatch
+            # because this is called for every name in each collected module,
+            # and fnmatch is somewhat expensive to call.
+            elif ("*" in option or "?" in option or "[" in option) and fnmatch.fnmatch(
+                name, option
+            ):
+                return True
+        return False
+
+    def collect(self) -> Iterable[Union[nodes.Item, nodes.Collector]]:
+        if not getattr(self.obj, "__test__", True):
+            return []
+
+        # Avoid random getattrs and peek in the __dict__ instead.
+        dicts = [getattr(self.obj, "__dict__", {})]
+        if isinstance(self.obj, type):
+            for basecls in self.obj.__mro__:
+                dicts.append(basecls.__dict__)
+
+        # In each class, nodes should be definition ordered.
+        # __dict__ is definition ordered.
+        seen: Set[str] = set()
+        dict_values: List[List[Union[nodes.Item, nodes.Collector]]] = []
+        ihook = self.ihook
+        for dic in dicts:
+            values: List[Union[nodes.Item, nodes.Collector]] = []
+            # Note: seems like the dict can change during iteration -
+            # be careful not to remove the list() without consideration.
+            for name, obj in list(dic.items()):
+                if name in IGNORED_ATTRIBUTES:
+                    continue
+                if name in seen:
+                    continue
+                seen.add(name)
+                res = ihook.pytest_pycollect_makeitem(
+                    collector=self, name=name, obj=obj
+                )
+                if res is None:
+                    continue
+                elif isinstance(res, list):
+                    values.extend(res)
+                else:
+                    values.append(res)
+            dict_values.append(values)
+
+        # Between classes in the class hierarchy, reverse-MRO order -- nodes
+        # inherited from base classes should come before subclasses.
+        result = []
+        for values in reversed(dict_values):
+            result.extend(values)
+        return result
+
+    def _genfunctions(self, name: str, funcobj) -> Iterator["Function"]:
+        modulecol = self.getparent(Module)
+        assert modulecol is not None
+        module = modulecol.obj
+        clscol = self.getparent(Class)
+        cls = clscol and clscol.obj or None
+
+        definition = FunctionDefinition.from_parent(self, name=name, callobj=funcobj)
+        fixtureinfo = definition._fixtureinfo
+
+        # pytest_generate_tests impls call metafunc.parametrize() which fills
+        # metafunc._calls, the outcome of the hook.
+        metafunc = Metafunc(
+            definition=definition,
+            fixtureinfo=fixtureinfo,
+            config=self.config,
+            cls=cls,
+            module=module,
+            _ispytest=True,
+        )
+        methods = []
+        if hasattr(module, "pytest_generate_tests"):
+            methods.append(module.pytest_generate_tests)
+        if cls is not None and hasattr(cls, "pytest_generate_tests"):
+            methods.append(cls().pytest_generate_tests)
+        self.ihook.pytest_generate_tests.call_extra(methods, dict(metafunc=metafunc))
+
+        if not metafunc._calls:
+            yield Function.from_parent(self, name=name, fixtureinfo=fixtureinfo)
+        else:
+            # Add funcargs() as fixturedefs to fixtureinfo.arg2fixturedefs.
+            fm = self.session._fixturemanager
+            fixtures.add_funcarg_pseudo_fixture_def(self, metafunc, fm)
+
+            # Add_funcarg_pseudo_fixture_def may have shadowed some fixtures
+            # with direct parametrization, so make sure we update what the
+            # function really needs.
+            fixtureinfo.prune_dependency_tree()
+
+            for callspec in metafunc._calls:
+                subname = f"{name}[{callspec.id}]"
+                yield Function.from_parent(
+                    self,
+                    name=subname,
+                    callspec=callspec,
+                    fixtureinfo=fixtureinfo,
+                    keywords={callspec.id: True},
+                    originalname=name,
+                )
+
+
+class Module(nodes.File, PyCollector):
+    """Collector for test classes and functions in a Python module."""
+
+    def _getobj(self):
+        return self._importtestmodule()
+
+    def collect(self) -> Iterable[Union[nodes.Item, nodes.Collector]]:
+        self._inject_setup_module_fixture()
+        self._inject_setup_function_fixture()
+        self.session._fixturemanager.parsefactories(self)
+        return super().collect()
+
+    def _inject_setup_module_fixture(self) -> None:
+        """Inject a hidden autouse, module scoped fixture into the collected module object
+        that invokes setUpModule/tearDownModule if either or both are available.
+
+        Using a fixture to invoke this methods ensures we play nicely and unsurprisingly with
+        other fixtures (#517).
+        """
+        has_nose = self.config.pluginmanager.has_plugin("nose")
+        setup_module = _get_first_non_fixture_func(
+            self.obj, ("setUpModule", "setup_module")
+        )
+        if setup_module is None and has_nose:
+            # The name "setup" is too common - only treat as fixture if callable.
+            setup_module = _get_first_non_fixture_func(self.obj, ("setup",))
+            if not callable(setup_module):
+                setup_module = None
+        teardown_module = _get_first_non_fixture_func(
+            self.obj, ("tearDownModule", "teardown_module")
+        )
+        if teardown_module is None and has_nose:
+            teardown_module = _get_first_non_fixture_func(self.obj, ("teardown",))
+            # Same as "setup" above - only treat as fixture if callable.
+            if not callable(teardown_module):
+                teardown_module = None
+
+        if setup_module is None and teardown_module is None:
+            return
+
+        @fixtures.fixture(
+            autouse=True,
+            scope="module",
+            # Use a unique name to speed up lookup.
+            name=f"_xunit_setup_module_fixture_{self.obj.__name__}",
+        )
+        def xunit_setup_module_fixture(request) -> Generator[None, None, None]:
+            if setup_module is not None:
+                _call_with_optional_argument(setup_module, request.module)
+            yield
+            if teardown_module is not None:
+                _call_with_optional_argument(teardown_module, request.module)
+
+        self.obj.__pytest_setup_module = xunit_setup_module_fixture
+
+    def _inject_setup_function_fixture(self) -> None:
+        """Inject a hidden autouse, function scoped fixture into the collected module object
+        that invokes setup_function/teardown_function if either or both are available.
+
+        Using a fixture to invoke this methods ensures we play nicely and unsurprisingly with
+        other fixtures (#517).
+        """
+        setup_function = _get_first_non_fixture_func(self.obj, ("setup_function",))
+        teardown_function = _get_first_non_fixture_func(
+            self.obj, ("teardown_function",)
+        )
+        if setup_function is None and teardown_function is None:
+            return
+
+        @fixtures.fixture(
+            autouse=True,
+            scope="function",
+            # Use a unique name to speed up lookup.
+            name=f"_xunit_setup_function_fixture_{self.obj.__name__}",
+        )
+        def xunit_setup_function_fixture(request) -> Generator[None, None, None]:
+            if request.instance is not None:
+                # in this case we are bound to an instance, so we need to let
+                # setup_method handle this
+                yield
+                return
+            if setup_function is not None:
+                _call_with_optional_argument(setup_function, request.function)
+            yield
+            if teardown_function is not None:
+                _call_with_optional_argument(teardown_function, request.function)
+
+        self.obj.__pytest_setup_function = xunit_setup_function_fixture
+
+    def _importtestmodule(self):
+        # We assume we are only called once per module.
+        importmode = self.config.getoption("--import-mode")
+        try:
+            mod = import_path(self.path, mode=importmode, root=self.config.rootpath)
+        except SyntaxError as e:
+            raise self.CollectError(
+                ExceptionInfo.from_current().getrepr(style="short")
+            ) from e
+        except ImportPathMismatchError as e:
+            raise self.CollectError(
+                "import file mismatch:\n"
+                "imported module %r has this __file__ attribute:\n"
+                "  %s\n"
+                "which is not the same as the test file we want to collect:\n"
+                "  %s\n"
+                "HINT: remove __pycache__ / .pyc files and/or use a "
+                "unique basename for your test file modules" % e.args
+            ) from e
+        except ImportError as e:
+            exc_info = ExceptionInfo.from_current()
+            if self.config.getoption("verbose") < 2:
+                exc_info.traceback = exc_info.traceback.filter(filter_traceback)
+            exc_repr = (
+                exc_info.getrepr(style="short")
+                if exc_info.traceback
+                else exc_info.exconly()
+            )
+            formatted_tb = str(exc_repr)
+            raise self.CollectError(
+                "ImportError while importing test module '{path}'.\n"
+                "Hint: make sure your test modules/packages have valid Python names.\n"
+                "Traceback:\n"
+                "{traceback}".format(path=self.path, traceback=formatted_tb)
+            ) from e
+        except skip.Exception as e:
+            if e.allow_module_level:
+                raise
+            raise self.CollectError(
+                "Using pytest.skip outside of a test will skip the entire module. "
+                "If that's your intention, pass `allow_module_level=True`. "
+                "If you want to skip a specific test or an entire class, "
+                "use the @pytest.mark.skip or @pytest.mark.skipif decorators."
+            ) from e
+        self.config.pluginmanager.consider_module(mod)
+        return mod
+
+
+class Package(Module):
+    """Collector for files and directories in a Python packages -- directories
+    with an `__init__.py` file."""
+
+    def __init__(
+        self,
+        fspath: Optional[LEGACY_PATH],
+        parent: nodes.Collector,
+        # NOTE: following args are unused:
+        config=None,
+        session=None,
+        nodeid=None,
+        path: Optional[Path] = None,
+    ) -> None:
+        # NOTE: Could be just the following, but kept as-is for compat.
+        # nodes.FSCollector.__init__(self, fspath, parent=parent)
+        session = parent.session
+        nodes.FSCollector.__init__(
+            self,
+            fspath=fspath,
+            path=path,
+            parent=parent,
+            config=config,
+            session=session,
+            nodeid=nodeid,
+        )
+        self.name = self.path.parent.name
+
+    def setup(self) -> None:
+        # Not using fixtures to call setup_module here because autouse fixtures
+        # from packages are not called automatically (#4085).
+        setup_module = _get_first_non_fixture_func(
+            self.obj, ("setUpModule", "setup_module")
+        )
+        if setup_module is not None:
+            _call_with_optional_argument(setup_module, self.obj)
+
+        teardown_module = _get_first_non_fixture_func(
+            self.obj, ("tearDownModule", "teardown_module")
+        )
+        if teardown_module is not None:
+            func = partial(_call_with_optional_argument, teardown_module, self.obj)
+            self.addfinalizer(func)
+
+    def _recurse(self, direntry: "os.DirEntry[str]") -> bool:
+        if direntry.name == "__pycache__":
+            return False
+        fspath = Path(direntry.path)
+        ihook = self.session.gethookproxy(fspath.parent)
+        if ihook.pytest_ignore_collect(collection_path=fspath, config=self.config):
+            return False
+        return True
+
+    def _collectfile(
+        self, fspath: Path, handle_dupes: bool = True
+    ) -> Sequence[nodes.Collector]:
+        assert (
+            fspath.is_file()
+        ), "{!r} is not a file (isdir={!r}, exists={!r}, islink={!r})".format(
+            fspath, fspath.is_dir(), fspath.exists(), fspath.is_symlink()
+        )
+        ihook = self.session.gethookproxy(fspath)
+        if not self.session.isinitpath(fspath):
+            if ihook.pytest_ignore_collect(collection_path=fspath, config=self.config):
+                return ()
+
+        if handle_dupes:
+            keepduplicates = self.config.getoption("keepduplicates")
+            if not keepduplicates:
+                duplicate_paths = self.config.pluginmanager._duplicatepaths
+                if fspath in duplicate_paths:
+                    return ()
+                else:
+                    duplicate_paths.add(fspath)
+
+        return ihook.pytest_collect_file(file_path=fspath, parent=self)  # type: ignore[no-any-return]
+
+    def collect(self) -> Iterable[Union[nodes.Item, nodes.Collector]]:
+        this_path = self.path.parent
+
+        # Always collect the __init__ first.
+        if path_matches_patterns(self.path, self.config.getini("python_files")):
+            yield Module.from_parent(self, path=self.path)
+
+        pkg_prefixes: Set[Path] = set()
+        for direntry in visit(str(this_path), recurse=self._recurse):
+            path = Path(direntry.path)
+
+            # We will visit our own __init__.py file, in which case we skip it.
+            if direntry.is_file():
+                if direntry.name == "__init__.py" and path.parent == this_path:
+                    continue
+
+            parts_ = parts(direntry.path)
+            if any(
+                str(pkg_prefix) in parts_ and pkg_prefix / "__init__.py" != path
+                for pkg_prefix in pkg_prefixes
+            ):
+                continue
+
+            if direntry.is_file():
+                yield from self._collectfile(path)
+            elif not direntry.is_dir():
+                # Broken symlink or invalid/missing file.
+                continue
+            elif path.joinpath("__init__.py").is_file():
+                pkg_prefixes.add(path)
+
+
+def _call_with_optional_argument(func, arg) -> None:
+    """Call the given function with the given argument if func accepts one argument, otherwise
+    calls func without arguments."""
+    arg_count = func.__code__.co_argcount
+    if inspect.ismethod(func):
+        arg_count -= 1
+    if arg_count:
+        func(arg)
+    else:
+        func()
+
+
+def _get_first_non_fixture_func(obj: object, names: Iterable[str]) -> Optional[object]:
+    """Return the attribute from the given object to be used as a setup/teardown
+    xunit-style function, but only if not marked as a fixture to avoid calling it twice.
+    """
+    for name in names:
+        meth: Optional[object] = getattr(obj, name, None)
+        if meth is not None and fixtures.getfixturemarker(meth) is None:
+            return meth
+    return None
+
+
+class Class(PyCollector):
+    """Collector for test methods (and nested classes) in a Python class."""
+
+    @classmethod
+    def from_parent(cls, parent, *, name, obj=None, **kw):
+        """The public constructor."""
+        return super().from_parent(name=name, parent=parent, **kw)
+
+    def newinstance(self):
+        return self.obj()
+
+    def collect(self) -> Iterable[Union[nodes.Item, nodes.Collector]]:
+        if not safe_getattr(self.obj, "__test__", True):
+            return []
+        if hasinit(self.obj):
+            assert self.parent is not None
+            self.warn(
+                PytestCollectionWarning(
+                    "cannot collect test class %r because it has a "
+                    "__init__ constructor (from: %s)"
+                    % (self.obj.__name__, self.parent.nodeid)
+                )
+            )
+            return []
+        elif hasnew(self.obj):
+            assert self.parent is not None
+            self.warn(
+                PytestCollectionWarning(
+                    "cannot collect test class %r because it has a "
+                    "__new__ constructor (from: %s)"
+                    % (self.obj.__name__, self.parent.nodeid)
+                )
+            )
+            return []
+
+        self._inject_setup_class_fixture()
+        self._inject_setup_method_fixture()
+
+        self.session._fixturemanager.parsefactories(self.newinstance(), self.nodeid)
+
+        return super().collect()
+
+    def _inject_setup_class_fixture(self) -> None:
+        """Inject a hidden autouse, class scoped fixture into the collected class object
+        that invokes setup_class/teardown_class if either or both are available.
+
+        Using a fixture to invoke this methods ensures we play nicely and unsurprisingly with
+        other fixtures (#517).
+        """
+        setup_class = _get_first_non_fixture_func(self.obj, ("setup_class",))
+        teardown_class = _get_first_non_fixture_func(self.obj, ("teardown_class",))
+        if setup_class is None and teardown_class is None:
+            return
+
+        @fixtures.fixture(
+            autouse=True,
+            scope="class",
+            # Use a unique name to speed up lookup.
+            name=f"_xunit_setup_class_fixture_{self.obj.__qualname__}",
+        )
+        def xunit_setup_class_fixture(cls) -> Generator[None, None, None]:
+            if setup_class is not None:
+                func = getimfunc(setup_class)
+                _call_with_optional_argument(func, self.obj)
+            yield
+            if teardown_class is not None:
+                func = getimfunc(teardown_class)
+                _call_with_optional_argument(func, self.obj)
+
+        self.obj.__pytest_setup_class = xunit_setup_class_fixture
+
+    def _inject_setup_method_fixture(self) -> None:
+        """Inject a hidden autouse, function scoped fixture into the collected class object
+        that invokes setup_method/teardown_method if either or both are available.
+
+        Using a fixture to invoke these methods ensures we play nicely and unsurprisingly with
+        other fixtures (#517).
+        """
+        has_nose = self.config.pluginmanager.has_plugin("nose")
+        setup_name = "setup_method"
+        setup_method = _get_first_non_fixture_func(self.obj, (setup_name,))
+        emit_nose_setup_warning = False
+        if setup_method is None and has_nose:
+            setup_name = "setup"
+            emit_nose_setup_warning = True
+            setup_method = _get_first_non_fixture_func(self.obj, (setup_name,))
+        teardown_name = "teardown_method"
+        teardown_method = _get_first_non_fixture_func(self.obj, (teardown_name,))
+        emit_nose_teardown_warning = False
+        if teardown_method is None and has_nose:
+            teardown_name = "teardown"
+            emit_nose_teardown_warning = True
+            teardown_method = _get_first_non_fixture_func(self.obj, (teardown_name,))
+        if setup_method is None and teardown_method is None:
+            return
+
+        @fixtures.fixture(
+            autouse=True,
+            scope="function",
+            # Use a unique name to speed up lookup.
+            name=f"_xunit_setup_method_fixture_{self.obj.__qualname__}",
+        )
+        def xunit_setup_method_fixture(self, request) -> Generator[None, None, None]:
+            method = request.function
+            if setup_method is not None:
+                func = getattr(self, setup_name)
+                _call_with_optional_argument(func, method)
+                if emit_nose_setup_warning:
+                    warnings.warn(
+                        NOSE_SUPPORT_METHOD.format(
+                            nodeid=request.node.nodeid, method="setup"
+                        ),
+                        stacklevel=2,
+                    )
+            yield
+            if teardown_method is not None:
+                func = getattr(self, teardown_name)
+                _call_with_optional_argument(func, method)
+                if emit_nose_teardown_warning:
+                    warnings.warn(
+                        NOSE_SUPPORT_METHOD.format(
+                            nodeid=request.node.nodeid, method="teardown"
+                        ),
+                        stacklevel=2,
+                    )
+
+        self.obj.__pytest_setup_method = xunit_setup_method_fixture
+
+
+class InstanceDummy:
+    """Instance used to be a node type between Class and Function. It has been
+    removed in pytest 7.0. Some plugins exist which reference `pytest.Instance`
+    only to ignore it; this dummy class keeps them working. This will be removed
+    in pytest 8."""
+
+
+def __getattr__(name: str) -> object:
+    if name == "Instance":
+        warnings.warn(INSTANCE_COLLECTOR, 2)
+        return InstanceDummy
+    raise AttributeError(f"module {__name__} has no attribute {name}")
+
+
+def hasinit(obj: object) -> bool:
+    init: object = getattr(obj, "__init__", None)
+    if init:
+        return init != object.__init__
+    return False
+
+
+def hasnew(obj: object) -> bool:
+    new: object = getattr(obj, "__new__", None)
+    if new:
+        return new != object.__new__
+    return False
+
+
+@final
+@dataclasses.dataclass(frozen=True)
+class IdMaker:
+    """Make IDs for a parametrization."""
+
+    __slots__ = (
+        "argnames",
+        "parametersets",
+        "idfn",
+        "ids",
+        "config",
+        "nodeid",
+        "func_name",
+    )
+
+    # The argnames of the parametrization.
+    argnames: Sequence[str]
+    # The ParameterSets of the parametrization.
+    parametersets: Sequence[ParameterSet]
+    # Optionally, a user-provided callable to make IDs for parameters in a
+    # ParameterSet.
+    idfn: Optional[Callable[[Any], Optional[object]]]
+    # Optionally, explicit IDs for ParameterSets by index.
+    ids: Optional[Sequence[Optional[object]]]
+    # Optionally, the pytest config.
+    # Used for controlling ASCII escaping, and for calling the
+    # :hook:`pytest_make_parametrize_id` hook.
+    config: Optional[Config]
+    # Optionally, the ID of the node being parametrized.
+    # Used only for clearer error messages.
+    nodeid: Optional[str]
+    # Optionally, the ID of the function being parametrized.
+    # Used only for clearer error messages.
+    func_name: Optional[str]
+
+    def make_unique_parameterset_ids(self) -> List[str]:
+        """Make a unique identifier for each ParameterSet, that may be used to
+        identify the parametrization in a node ID.
+
+        Format is <prm_1_token>-...-<prm_n_token>[counter], where prm_x_token is
+        - user-provided id, if given
+        - else an id derived from the value, applicable for certain types
+        - else <argname><parameterset index>
+        The counter suffix is appended only in case a string wouldn't be unique
+        otherwise.
+        """
+        resolved_ids = list(self._limit_ids(self._resolve_ids(), limit=500))
+        # All IDs must be unique!
+        if len(resolved_ids) != len(set(resolved_ids)):
+            # Record the number of occurrences of each ID.
+            id_counts = Counter(resolved_ids)
+            # Map the ID to its next suffix.
+            id_suffixes: Dict[str, int] = defaultdict(int)
+            # Suffix non-unique IDs to make them unique.
+            for index, id in enumerate(resolved_ids):
+                if id_counts[id] > 1:
+                    resolved_ids[index] = f"{id}{id_suffixes[id]}"
+                    id_suffixes[id] += 1
+        return resolved_ids
+
+    def _limit_ids(self, ids, limit=500):
+        prefix_count = {}
+        limit -= 6
+        assert limit > 0
+
+        for idval in ids:
+            if len(idval) > limit:
+                prefix = idval[:limit]
+                idx = prefix_count.get(prefix, -1) + 1
+                prefix_count[prefix] = idx
+                idval = "{}-{}".format(prefix, idx)
+            yield idval
+
+    def _resolve_ids(self) -> Iterable[str]:
+        """Resolve IDs for all ParameterSets (may contain duplicates)."""
+        for idx, parameterset in enumerate(self.parametersets):
+            if parameterset.id is not None:
+                # ID provided directly - pytest.param(..., id="...")
+                yield parameterset.id
+            elif self.ids and idx < len(self.ids) and self.ids[idx] is not None:
+                # ID provided in the IDs list - parametrize(..., ids=[...]).
+                yield self._idval_from_value_required(self.ids[idx], idx)
+            else:
+                # ID not provided - generate it.
+                yield "-".join(
+                    self._idval(val, argname, idx)
+                    for val, argname in zip(parameterset.values, self.argnames)
+                )
+
+    def _idval(self, val: object, argname: str, idx: int) -> str:
+        """Make an ID for a parameter in a ParameterSet."""
+        idval = self._idval_from_function(val, argname, idx)
+        if idval is not None:
+            return idval
+        idval = self._idval_from_hook(val, argname)
+        if idval is not None:
+            return idval
+        idval = self._idval_from_value(val)
+        if idval is not None:
+            return idval
+        return self._idval_from_argname(argname, idx)
+
+    def _idval_from_function(
+        self, val: object, argname: str, idx: int
+    ) -> Optional[str]:
+        """Try to make an ID for a parameter in a ParameterSet using the
+        user-provided id callable, if given."""
+        if self.idfn is None:
+            return None
+        try:
+            id = self.idfn(val)
+        except Exception as e:
+            prefix = f"{self.nodeid}: " if self.nodeid is not None else ""
+            msg = "error raised while trying to determine id of parameter '{}' at position {}"
+            msg = prefix + msg.format(argname, idx)
+            raise ValueError(msg) from e
+        if id is None:
+            return None
+        return self._idval_from_value(id)
+
+    def _idval_from_hook(self, val: object, argname: str) -> Optional[str]:
+        """Try to make an ID for a parameter in a ParameterSet by calling the
+        :hook:`pytest_make_parametrize_id` hook."""
+        if self.config:
+            id: Optional[str] = self.config.hook.pytest_make_parametrize_id(
+                config=self.config, val=val, argname=argname
+            )
+            return id
+        return None
+
+    def _idval_from_value(self, val: object) -> Optional[str]:
+        """Try to make an ID for a parameter in a ParameterSet from its value,
+        if the value type is supported."""
+        if isinstance(val, STRING_TYPES):
+            return _ascii_escaped_by_config(val, self.config)
+        elif val is None or isinstance(val, (float, int, bool, complex)):
+            return str(val)
+        elif isinstance(val, Pattern):
+            return ascii_escaped(val.pattern)
+        elif val is NOTSET:
+            # Fallback to default. Note that NOTSET is an enum.Enum.
+            pass
+        elif isinstance(val, enum.Enum):
+            return str(val)
+        elif isinstance(getattr(val, "__name__", None), str):
+            # Name of a class, function, module, etc.
+            name: str = getattr(val, "__name__")
+            return name
+        return None
+
+    def _idval_from_value_required(self, val: object, idx: int) -> str:
+        """Like _idval_from_value(), but fails if the type is not supported."""
+        id = self._idval_from_value(val)
+        if id is not None:
+            return id
+
+        # Fail.
+        if self.func_name is not None:
+            prefix = f"In {self.func_name}: "
+        elif self.nodeid is not None:
+            prefix = f"In {self.nodeid}: "
+        else:
+            prefix = ""
+        msg = (
+            f"{prefix}ids contains unsupported value {saferepr(val)} (type: {type(val)!r}) at index {idx}. "
+            "Supported types are: str, bytes, int, float, complex, bool, enum, regex or anything with a __name__."
+        )
+        fail(msg, pytrace=False)
+
+    @staticmethod
+    def _idval_from_argname(argname: str, idx: int) -> str:
+        """Make an ID for a parameter in a ParameterSet from the argument name
+        and the index of the ParameterSet."""
+        return str(argname) + str(idx)
+
+
+@final
+@dataclasses.dataclass(frozen=True)
+class CallSpec2:
+    """A planned parameterized invocation of a test function.
+
+    Calculated during collection for a given test function's Metafunc.
+    Once collection is over, each callspec is turned into a single Item
+    and stored in item.callspec.
+    """
+
+    # arg name -> arg value which will be passed to the parametrized test
+    # function (direct parameterization).
+    funcargs: Dict[str, object] = dataclasses.field(default_factory=dict)
+    # arg name -> arg value which will be passed to a fixture of the same name
+    # (indirect parametrization).
+    params: Dict[str, object] = dataclasses.field(default_factory=dict)
+    # arg name -> arg index.
+    indices: Dict[str, int] = dataclasses.field(default_factory=dict)
+    # Used for sorting parametrized resources.
+    _arg2scope: Dict[str, Scope] = dataclasses.field(default_factory=dict)
+    # Parts which will be added to the item's name in `[..]` separated by "-".
+    _idlist: List[str] = dataclasses.field(default_factory=list)
+    # Marks which will be applied to the item.
+    marks: List[Mark] = dataclasses.field(default_factory=list)
+
+    def setmulti(
+        self,
+        *,
+        valtypes: Mapping[str, "Literal['params', 'funcargs']"],
+        argnames: Iterable[str],
+        valset: Iterable[object],
+        id: str,
+        marks: Iterable[Union[Mark, MarkDecorator]],
+        scope: Scope,
+        param_index: int,
+    ) -> "CallSpec2":
+        funcargs = self.funcargs.copy()
+        params = self.params.copy()
+        indices = self.indices.copy()
+        arg2scope = self._arg2scope.copy()
+        for arg, val in zip(argnames, valset):
+            if arg in params or arg in funcargs:
+                raise ValueError(f"duplicate parametrization of {arg!r}")
+            valtype_for_arg = valtypes[arg]
+            if valtype_for_arg == "params":
+                params[arg] = val
+            elif valtype_for_arg == "funcargs":
+                funcargs[arg] = val
+            else:
+                assert_never(valtype_for_arg)
+            indices[arg] = param_index
+            arg2scope[arg] = scope
+        return CallSpec2(
+            funcargs=funcargs,
+            params=params,
+            indices=indices,
+            _arg2scope=arg2scope,
+            _idlist=[*self._idlist, id],
+            marks=[*self.marks, *normalize_mark_list(marks)],
+        )
+
+    def getparam(self, name: str) -> object:
+        try:
+            return self.params[name]
+        except KeyError as e:
+            raise ValueError(name) from e
+
+    @property
+    def id(self) -> str:
+        return "-".join(self._idlist)
+
+
+@final
+class Metafunc:
+    """Objects passed to the :hook:`pytest_generate_tests` hook.
+
+    They help to inspect a test function and to generate tests according to
+    test configuration or values specified in the class or module where a
+    test function is defined.
+    """
+
+    def __init__(
+        self,
+        definition: "FunctionDefinition",
+        fixtureinfo: fixtures.FuncFixtureInfo,
+        config: Config,
+        cls=None,
+        module=None,
+        *,
+        _ispytest: bool = False,
+    ) -> None:
+        check_ispytest(_ispytest)
+
+        #: Access to the underlying :class:`_pytest.python.FunctionDefinition`.
+        self.definition = definition
+
+        #: Access to the :class:`pytest.Config` object for the test session.
+        self.config = config
+
+        #: The module object where the test function is defined in.
+        self.module = module
+
+        #: Underlying Python test function.
+        self.function = definition.obj
+
+        #: Set of fixture names required by the test function.
+        self.fixturenames = fixtureinfo.names_closure
+
+        #: Class object where the test function is defined in or ``None``.
+        self.cls = cls
+
+        self._arg2fixturedefs = fixtureinfo.name2fixturedefs
+
+        # Result of parametrize().
+        self._calls: List[CallSpec2] = []
+
+    def parametrize(
+        self,
+        argnames: Union[str, Sequence[str]],
+        argvalues: Iterable[Union[ParameterSet, Sequence[object], object]],
+        indirect: Union[bool, Sequence[str]] = False,
+        ids: Optional[
+            Union[Iterable[Optional[object]], Callable[[Any], Optional[object]]]
+        ] = None,
+        scope: "Optional[_ScopeName]" = None,
+        *,
+        _param_mark: Optional[Mark] = None,
+    ) -> None:
+        """Add new invocations to the underlying test function using the list
+        of argvalues for the given argnames. Parametrization is performed
+        during the collection phase. If you need to setup expensive resources
+        see about setting indirect to do it rather than at test setup time.
+
+        Can be called multiple times per test function (but only on different
+        argument names), in which case each call parametrizes all previous
+        parametrizations, e.g.
+
+        ::
+
+            unparametrized:         t
+            parametrize ["x", "y"]: t[x], t[y]
+            parametrize [1, 2]:     t[x-1], t[x-2], t[y-1], t[y-2]
+
+        :param argnames:
+            A comma-separated string denoting one or more argument names, or
+            a list/tuple of argument strings.
+
+        :param argvalues:
+            The list of argvalues determines how often a test is invoked with
+            different argument values.
+
+            If only one argname was specified argvalues is a list of values.
+            If N argnames were specified, argvalues must be a list of
+            N-tuples, where each tuple-element specifies a value for its
+            respective argname.
+
+        :param indirect:
+            A list of arguments' names (subset of argnames) or a boolean.
+            If True the list contains all names from the argnames. Each
+            argvalue corresponding to an argname in this list will
+            be passed as request.param to its respective argname fixture
+            function so that it can perform more expensive setups during the
+            setup phase of a test rather than at collection time.
+
+        :param ids:
+            Sequence of (or generator for) ids for ``argvalues``,
+            or a callable to return part of the id for each argvalue.
+
+            With sequences (and generators like ``itertools.count()``) the
+            returned ids should be of type ``string``, ``int``, ``float``,
+            ``bool``, or ``None``.
+            They are mapped to the corresponding index in ``argvalues``.
+            ``None`` means to use the auto-generated id.
+
+            If it is a callable it will be called for each entry in
+            ``argvalues``, and the return value is used as part of the
+            auto-generated id for the whole set (where parts are joined with
+            dashes ("-")).
+            This is useful to provide more specific ids for certain items, e.g.
+            dates.  Returning ``None`` will use an auto-generated id.
+
+            If no ids are provided they will be generated automatically from
+            the argvalues.
+
+        :param scope:
+            If specified it denotes the scope of the parameters.
+            The scope is used for grouping tests by parameter instances.
+            It will also override any fixture-function defined scope, allowing
+            to set a dynamic scope using test context or configuration.
+        """
+        argnames, parametersets = ParameterSet._for_parametrize(
+            argnames,
+            argvalues,
+            self.function,
+            self.config,
+            nodeid=self.definition.nodeid,
+        )
+        del argvalues
+
+        if "request" in argnames:
+            fail(
+                "'request' is a reserved name and cannot be used in @pytest.mark.parametrize",
+                pytrace=False,
+            )
+
+        if scope is not None:
+            scope_ = Scope.from_user(
+                scope, descr=f"parametrize() call in {self.function.__name__}"
+            )
+        else:
+            scope_ = _find_parametrized_scope(argnames, self._arg2fixturedefs, indirect)
+
+        self._validate_if_using_arg_names(argnames, indirect)
+
+        arg_values_types = self._resolve_arg_value_types(argnames, indirect)
+
+        # Use any already (possibly) generated ids with parametrize Marks.
+        if _param_mark and _param_mark._param_ids_from:
+            generated_ids = _param_mark._param_ids_from._param_ids_generated
+            if generated_ids is not None:
+                ids = generated_ids
+
+        ids = self._resolve_parameter_set_ids(
+            argnames, ids, parametersets, nodeid=self.definition.nodeid
+        )
+
+        # Store used (possibly generated) ids with parametrize Marks.
+        if _param_mark and _param_mark._param_ids_from and generated_ids is None:
+            object.__setattr__(_param_mark._param_ids_from, "_param_ids_generated", ids)
+
+        # Create the new calls: if we are parametrize() multiple times (by applying the decorator
+        # more than once) then we accumulate those calls generating the cartesian product
+        # of all calls.
+        newcalls = []
+        for callspec in self._calls or [CallSpec2()]:
+            for param_index, (param_id, param_set) in enumerate(
+                zip(ids, parametersets)
+            ):
+                newcallspec = callspec.setmulti(
+                    valtypes=arg_values_types,
+                    argnames=argnames,
+                    valset=param_set.values,
+                    id=param_id,
+                    marks=param_set.marks,
+                    scope=scope_,
+                    param_index=param_index,
+                )
+                newcalls.append(newcallspec)
+        self._calls = newcalls
+
+    def _resolve_parameter_set_ids(
+        self,
+        argnames: Sequence[str],
+        ids: Optional[
+            Union[Iterable[Optional[object]], Callable[[Any], Optional[object]]]
+        ],
+        parametersets: Sequence[ParameterSet],
+        nodeid: str,
+    ) -> List[str]:
+        """Resolve the actual ids for the given parameter sets.
+
+        :param argnames:
+            Argument names passed to ``parametrize()``.
+        :param ids:
+            The `ids` parameter of the ``parametrize()`` call (see docs).
+        :param parametersets:
+            The parameter sets, each containing a set of values corresponding
+            to ``argnames``.
+        :param nodeid str:
+            The nodeid of the definition item that generated this
+            parametrization.
+        :returns:
+            List with ids for each parameter set given.
+        """
+        if ids is None:
+            idfn = None
+            ids_ = None
+        elif callable(ids):
+            idfn = ids
+            ids_ = None
+        else:
+            idfn = None
+            ids_ = self._validate_ids(ids, parametersets, self.function.__name__)
+        id_maker = IdMaker(
+            argnames,
+            parametersets,
+            idfn,
+            ids_,
+            self.config,
+            nodeid=nodeid,
+            func_name=self.function.__name__,
+        )
+        return id_maker.make_unique_parameterset_ids()
+
+    def _validate_ids(
+        self,
+        ids: Iterable[Optional[object]],
+        parametersets: Sequence[ParameterSet],
+        func_name: str,
+    ) -> List[Optional[object]]:
+        try:
+            num_ids = len(ids)  # type: ignore[arg-type]
+        except TypeError:
+            try:
+                iter(ids)
+            except TypeError as e:
+                raise TypeError("ids must be a callable or an iterable") from e
+            num_ids = len(parametersets)
+
+        # num_ids == 0 is a special case: https://github.com/pytest-dev/pytest/issues/1849
+        if num_ids != len(parametersets) and num_ids != 0:
+            msg = "In {}: {} parameter sets specified, with different number of ids: {}"
+            fail(msg.format(func_name, len(parametersets), num_ids), pytrace=False)
+
+        return list(itertools.islice(ids, num_ids))
+
+    def _resolve_arg_value_types(
+        self,
+        argnames: Sequence[str],
+        indirect: Union[bool, Sequence[str]],
+    ) -> Dict[str, "Literal['params', 'funcargs']"]:
+        """Resolve if each parametrized argument must be considered a
+        parameter to a fixture or a "funcarg" to the function, based on the
+        ``indirect`` parameter of the parametrized() call.
+
+        :param List[str] argnames: List of argument names passed to ``parametrize()``.
+        :param indirect: Same as the ``indirect`` parameter of ``parametrize()``.
+        :rtype: Dict[str, str]
+            A dict mapping each arg name to either:
+            * "params" if the argname should be the parameter of a fixture of the same name.
+            * "funcargs" if the argname should be a parameter to the parametrized test function.
+        """
+        if isinstance(indirect, bool):
+            valtypes: Dict[str, Literal["params", "funcargs"]] = dict.fromkeys(
+                argnames, "params" if indirect else "funcargs"
+            )
+        elif isinstance(indirect, Sequence):
+            valtypes = dict.fromkeys(argnames, "funcargs")
+            for arg in indirect:
+                if arg not in argnames:
+                    fail(
+                        "In {}: indirect fixture '{}' doesn't exist".format(
+                            self.function.__name__, arg
+                        ),
+                        pytrace=False,
+                    )
+                valtypes[arg] = "params"
+        else:
+            fail(
+                "In {func}: expected Sequence or boolean for indirect, got {type}".format(
+                    type=type(indirect).__name__, func=self.function.__name__
+                ),
+                pytrace=False,
+            )
+        return valtypes
+
+    def _validate_if_using_arg_names(
+        self,
+        argnames: Sequence[str],
+        indirect: Union[bool, Sequence[str]],
+    ) -> None:
+        """Check if all argnames are being used, by default values, or directly/indirectly.
+
+        :param List[str] argnames: List of argument names passed to ``parametrize()``.
+        :param indirect: Same as the ``indirect`` parameter of ``parametrize()``.
+        :raises ValueError: If validation fails.
+        """
+        default_arg_names = set(get_default_arg_names(self.function))
+        func_name = self.function.__name__
+        for arg in argnames:
+            if arg not in self.fixturenames:
+                if arg in default_arg_names:
+                    fail(
+                        "In {}: function already takes an argument '{}' with a default value".format(
+                            func_name, arg
+                        ),
+                        pytrace=False,
+                    )
+                else:
+                    if isinstance(indirect, Sequence):
+                        name = "fixture" if arg in indirect else "argument"
+                    else:
+                        name = "fixture" if indirect else "argument"
+                    fail(
+                        f"In {func_name}: function uses no {name} '{arg}'",
+                        pytrace=False,
+                    )
+
+
+def _find_parametrized_scope(
+    argnames: Sequence[str],
+    arg2fixturedefs: Mapping[str, Sequence[fixtures.FixtureDef[object]]],
+    indirect: Union[bool, Sequence[str]],
+) -> Scope:
+    """Find the most appropriate scope for a parametrized call based on its arguments.
+
+    When there's at least one direct argument, always use "function" scope.
+
+    When a test function is parametrized and all its arguments are indirect
+    (e.g. fixtures), return the most narrow scope based on the fixtures used.
+
+    Related to issue #1832, based on code posted by @Kingdread.
+    """
+    if isinstance(indirect, Sequence):
+        all_arguments_are_fixtures = len(indirect) == len(argnames)
+    else:
+        all_arguments_are_fixtures = bool(indirect)
+
+    if all_arguments_are_fixtures:
+        fixturedefs = arg2fixturedefs or {}
+        used_scopes = [
+            fixturedef[0]._scope
+            for name, fixturedef in fixturedefs.items()
+            if name in argnames
+        ]
+        # Takes the most narrow scope from used fixtures.
+        return min(used_scopes, default=Scope.Function)
+
+    return Scope.Function
+
+
+def _ascii_escaped_by_config(val: Union[str, bytes], config: Optional[Config]) -> str:
+    if config is None:
+        escape_option = False
+    else:
+        escape_option = config.getini(
+            "disable_test_id_escaping_and_forfeit_all_rights_to_community_support"
+        )
+    # TODO: If escaping is turned off and the user passes bytes,
+    #       will return a bytes. For now we ignore this but the
+    #       code *probably* doesn't handle this case.
+    return val if escape_option else ascii_escaped(val)  # type: ignore
+
+
+def _pretty_fixture_path(func) -> str:
+    cwd = Path.cwd()
+    loc = Path(getlocation(func, str(cwd)))
+    prefix = Path("...", "_pytest")
+    try:
+        return str(prefix / loc.relative_to(_PYTEST_DIR))
+    except ValueError:
+        return bestrelpath(cwd, loc)
+
+
+def show_fixtures_per_test(config):
+    from _pytest.main import wrap_session
+
+    return wrap_session(config, _show_fixtures_per_test)
+
+
+def _show_fixtures_per_test(config: Config, session: Session) -> None:
+    import _pytest.config
+
+    session.perform_collect()
+    curdir = Path.cwd()
+    tw = _pytest.config.create_terminal_writer(config)
+    verbose = config.getvalue("verbose")
+
+    def get_best_relpath(func) -> str:
+        loc = getlocation(func, str(curdir))
+        return bestrelpath(curdir, Path(loc))
+
+    def write_fixture(fixture_def: fixtures.FixtureDef[object]) -> None:
+        argname = fixture_def.argname
+        if verbose <= 0 and argname.startswith("_"):
+            return
+        prettypath = _pretty_fixture_path(fixture_def.func)
+        tw.write(f"{argname}", green=True)
+        tw.write(f" -- {prettypath}", yellow=True)
+        tw.write("\n")
+        fixture_doc = inspect.getdoc(fixture_def.func)
+        if fixture_doc:
+            write_docstring(
+                tw, fixture_doc.split("\n\n")[0] if verbose <= 0 else fixture_doc
+            )
+        else:
+            tw.line("    no docstring available", red=True)
+
+    def write_item(item: nodes.Item) -> None:
+        # Not all items have _fixtureinfo attribute.
+        info: Optional[FuncFixtureInfo] = getattr(item, "_fixtureinfo", None)
+        if info is None or not info.name2fixturedefs:
+            # This test item does not use any fixtures.
+            return
+        tw.line()
+        tw.sep("-", f"fixtures used by {item.name}")
+        # TODO: Fix this type ignore.
+        tw.sep("-", f"({get_best_relpath(item.function)})")  # type: ignore[attr-defined]
+        # dict key not used in loop but needed for sorting.
+        for _, fixturedefs in sorted(info.name2fixturedefs.items()):
+            assert fixturedefs is not None
+            if not fixturedefs:
+                continue
+            # Last item is expected to be the one used by the test item.
+            write_fixture(fixturedefs[-1])
+
+    for session_item in session.items:
+        write_item(session_item)
+
+
+def showfixtures(config: Config) -> Union[int, ExitCode]:
+    from _pytest.main import wrap_session
+
+    return wrap_session(config, _showfixtures_main)
+
+
+def _showfixtures_main(config: Config, session: Session) -> None:
+    import _pytest.config
+
+    session.perform_collect()
+    curdir = Path.cwd()
+    tw = _pytest.config.create_terminal_writer(config)
+    verbose = config.getvalue("verbose")
+
+    fm = session._fixturemanager
+
+    available = []
+    seen: Set[Tuple[str, str]] = set()
+
+    for argname, fixturedefs in fm._arg2fixturedefs.items():
+        assert fixturedefs is not None
+        if not fixturedefs:
+            continue
+        for fixturedef in fixturedefs:
+            loc = getlocation(fixturedef.func, str(curdir))
+            if (fixturedef.argname, loc) in seen:
+                continue
+            seen.add((fixturedef.argname, loc))
+            available.append(
+                (
+                    len(fixturedef.baseid),
+                    fixturedef.func.__module__,
+                    _pretty_fixture_path(fixturedef.func),
+                    fixturedef.argname,
+                    fixturedef,
+                )
+            )
+
+    available.sort()
+    currentmodule = None
+    for baseid, module, prettypath, argname, fixturedef in available:
+        if currentmodule != module:
+            if not module.startswith("_pytest."):
+                tw.line()
+                tw.sep("-", f"fixtures defined from {module}")
+                currentmodule = module
+        if verbose <= 0 and argname.startswith("_"):
+            continue
+        tw.write(f"{argname}", green=True)
+        if fixturedef.scope != "function":
+            tw.write(" [%s scope]" % fixturedef.scope, cyan=True)
+        tw.write(f" -- {prettypath}", yellow=True)
+        tw.write("\n")
+        doc = inspect.getdoc(fixturedef.func)
+        if doc:
+            write_docstring(tw, doc.split("\n\n")[0] if verbose <= 0 else doc)
+        else:
+            tw.line("    no docstring available", red=True)
+        tw.line()
+
+
+def write_docstring(tw: TerminalWriter, doc: str, indent: str = "    ") -> None:
+    for line in doc.split("\n"):
+        tw.line(indent + line)
+
+
+class Function(PyobjMixin, nodes.Item):
+    """Item responsible for setting up and executing a Python test function.
+
+    :param name:
+        The full function name, including any decorations like those
+        added by parametrization (``my_func[my_param]``).
+    :param parent:
+        The parent Node.
+    :param config:
+        The pytest Config object.
+    :param callspec:
+        If given, this is function has been parametrized and the callspec contains
+        meta information about the parametrization.
+    :param callobj:
+        If given, the object which will be called when the Function is invoked,
+        otherwise the callobj will be obtained from ``parent`` using ``originalname``.
+    :param keywords:
+        Keywords bound to the function object for "-k" matching.
+    :param session:
+        The pytest Session object.
+    :param fixtureinfo:
+        Fixture information already resolved at this fixture node..
+    :param originalname:
+        The attribute name to use for accessing the underlying function object.
+        Defaults to ``name``. Set this if name is different from the original name,
+        for example when it contains decorations like those added by parametrization
+        (``my_func[my_param]``).
+    """
+
+    # Disable since functions handle it themselves.
+    _ALLOW_MARKERS = False
+
+    def __init__(
+        self,
+        name: str,
+        parent,
+        config: Optional[Config] = None,
+        callspec: Optional[CallSpec2] = None,
+        callobj=NOTSET,
+        keywords: Optional[Mapping[str, Any]] = None,
+        session: Optional[Session] = None,
+        fixtureinfo: Optional[FuncFixtureInfo] = None,
+        originalname: Optional[str] = None,
+    ) -> None:
+        super().__init__(name, parent, config=config, session=session)
+
+        if callobj is not NOTSET:
+            self.obj = callobj
+
+        #: Original function name, without any decorations (for example
+        #: parametrization adds a ``"[...]"`` suffix to function names), used to access
+        #: the underlying function object from ``parent`` (in case ``callobj`` is not given
+        #: explicitly).
+        #:
+        #: .. versionadded:: 3.0
+        self.originalname = originalname or name
+
+        # Note: when FunctionDefinition is introduced, we should change ``originalname``
+        # to a readonly property that returns FunctionDefinition.name.
+
+        self.own_markers.extend(get_unpacked_marks(self.obj))
+        if callspec:
+            self.callspec = callspec
+            self.own_markers.extend(callspec.marks)
+
+        # todo: this is a hell of a hack
+        # https://github.com/pytest-dev/pytest/issues/4569
+        # Note: the order of the updates is important here; indicates what
+        # takes priority (ctor argument over function attributes over markers).
+        # Take own_markers only; NodeKeywords handles parent traversal on its own.
+        self.keywords.update((mark.name, mark) for mark in self.own_markers)
+        self.keywords.update(self.obj.__dict__)
+        if keywords:
+            self.keywords.update(keywords)
+
+        if fixtureinfo is None:
+            fixtureinfo = self.session._fixturemanager.getfixtureinfo(
+                self, self.obj, self.cls, funcargs=True
+            )
+        self._fixtureinfo: FuncFixtureInfo = fixtureinfo
+        self.fixturenames = fixtureinfo.names_closure
+        self._initrequest()
+
+    @classmethod
+    def from_parent(cls, parent, **kw):  # todo: determine sound type limitations
+        """The public constructor."""
+        return super().from_parent(parent=parent, **kw)
+
+    def _initrequest(self) -> None:
+        self.funcargs: Dict[str, object] = {}
+        self._request = fixtures.FixtureRequest(self, _ispytest=True)
+
+    @property
+    def function(self):
+        """Underlying python 'function' object."""
+        return getimfunc(self.obj)
+
+    def _getobj(self):
+        assert self.parent is not None
+        if isinstance(self.parent, Class):
+            # Each Function gets a fresh class instance.
+            parent_obj = self.parent.newinstance()
+        else:
+            parent_obj = self.parent.obj  # type: ignore[attr-defined]
+        return getattr(parent_obj, self.originalname)
+
+    @property
+    def _pyfuncitem(self):
+        """(compatonly) for code expecting pytest-2.2 style request objects."""
+        return self
+
+    def runtest(self) -> None:
+        """Execute the underlying test function."""
+        self.ihook.pytest_pyfunc_call(pyfuncitem=self)
+
+    def setup(self) -> None:
+        self._request._fillfixtures()
+
+    def _traceback_filter(self, excinfo: ExceptionInfo[BaseException]) -> Traceback:
+        if hasattr(self, "_obj") and not self.config.getoption("fulltrace", False):
+            code = _pytest._code.Code.from_function(get_real_func(self.obj))
+            path, firstlineno = code.path, code.firstlineno
+            traceback = excinfo.traceback
+            ntraceback = traceback.cut(path=path, firstlineno=firstlineno)
+            if ntraceback == traceback:
+                ntraceback = ntraceback.cut(path=path)
+                if ntraceback == traceback:
+                    ntraceback = ntraceback.filter(filter_traceback)
+                    if not ntraceback:
+                        ntraceback = traceback
+            ntraceback = ntraceback.filter(excinfo)
+
+            # issue364: mark all but first and last frames to
+            # only show a single-line message for each frame.
+            if self.config.getoption("tbstyle", "auto") == "auto":
+                if len(ntraceback) > 2:
+                    ntraceback = Traceback(
+                        entry
+                        if i == 0 or i == len(ntraceback) - 1
+                        else entry.with_repr_style("short")
+                        for i, entry in enumerate(ntraceback)
+                    )
+
+            return ntraceback
+        return excinfo.traceback
+
+    # TODO: Type ignored -- breaks Liskov Substitution.
+    def repr_failure(  # type: ignore[override]
+        self,
+        excinfo: ExceptionInfo[BaseException],
+    ) -> Union[str, TerminalRepr]:
+        style = self.config.getoption("tbstyle", "auto")
+        if style == "auto":
+            style = "long"
+        return self._repr_failure_py(excinfo, style=style)
+
+
+class FunctionDefinition(Function):
+    """This class is a stop gap solution until we evolve to have actual function
+    definition nodes and manage to get rid of ``metafunc``."""
+
+    def runtest(self) -> None:
+        raise RuntimeError("function definitions are not supposed to be run as tests")
+
+    setup = runtest
diff --git a/contrib/python/pytest/py3/_pytest/python_api.py b/contrib/python/pytest/py3/_pytest/python_api.py
new file mode 100644
index 0000000000..183356100c
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/python_api.py
@@ -0,0 +1,996 @@
+import math
+import pprint
+from collections.abc import Collection
+from collections.abc import Sized
+from decimal import Decimal
+from numbers import Complex
+from types import TracebackType
+from typing import Any
+from typing import Callable
+from typing import cast
+from typing import ContextManager
+from typing import List
+from typing import Mapping
+from typing import Optional
+from typing import Pattern
+from typing import Sequence
+from typing import Tuple
+from typing import Type
+from typing import TYPE_CHECKING
+from typing import TypeVar
+from typing import Union
+
+if TYPE_CHECKING:
+    from numpy import ndarray
+
+
+import _pytest._code
+from _pytest.compat import final
+from _pytest.compat import STRING_TYPES
+from _pytest.compat import overload
+from _pytest.outcomes import fail
+
+
+def _non_numeric_type_error(value, at: Optional[str]) -> TypeError:
+    at_str = f" at {at}" if at else ""
+    return TypeError(
+        "cannot make approximate comparisons to non-numeric values: {!r} {}".format(
+            value, at_str
+        )
+    )
+
+
+def _compare_approx(
+    full_object: object,
+    message_data: Sequence[Tuple[str, str, str]],
+    number_of_elements: int,
+    different_ids: Sequence[object],
+    max_abs_diff: float,
+    max_rel_diff: float,
+) -> List[str]:
+    message_list = list(message_data)
+    message_list.insert(0, ("Index", "Obtained", "Expected"))
+    max_sizes = [0, 0, 0]
+    for index, obtained, expected in message_list:
+        max_sizes[0] = max(max_sizes[0], len(index))
+        max_sizes[1] = max(max_sizes[1], len(obtained))
+        max_sizes[2] = max(max_sizes[2], len(expected))
+    explanation = [
+        f"comparison failed. Mismatched elements: {len(different_ids)} / {number_of_elements}:",
+        f"Max absolute difference: {max_abs_diff}",
+        f"Max relative difference: {max_rel_diff}",
+    ] + [
+        f"{indexes:<{max_sizes[0]}} | {obtained:<{max_sizes[1]}} | {expected:<{max_sizes[2]}}"
+        for indexes, obtained, expected in message_list
+    ]
+    return explanation
+
+
+# builtin pytest.approx helper
+
+
+class ApproxBase:
+    """Provide shared utilities for making approximate comparisons between
+    numbers or sequences of numbers."""
+
+    # Tell numpy to use our `__eq__` operator instead of its.
+    __array_ufunc__ = None
+    __array_priority__ = 100
+
+    def __init__(self, expected, rel=None, abs=None, nan_ok: bool = False) -> None:
+        __tracebackhide__ = True
+        self.expected = expected
+        self.abs = abs
+        self.rel = rel
+        self.nan_ok = nan_ok
+        self._check_type()
+
+    def __repr__(self) -> str:
+        raise NotImplementedError
+
+    def _repr_compare(self, other_side: Any) -> List[str]:
+        return [
+            "comparison failed",
+            f"Obtained: {other_side}",
+            f"Expected: {self}",
+        ]
+
+    def __eq__(self, actual) -> bool:
+        return all(
+            a == self._approx_scalar(x) for a, x in self._yield_comparisons(actual)
+        )
+
+    def __bool__(self):
+        __tracebackhide__ = True
+        raise AssertionError(
+            "approx() is not supported in a boolean context.\nDid you mean: `assert a == approx(b)`?"
+        )
+
+    # Ignore type because of https://github.com/python/mypy/issues/4266.
+    __hash__ = None  # type: ignore
+
+    def __ne__(self, actual) -> bool:
+        return not (actual == self)
+
+    def _approx_scalar(self, x) -> "ApproxScalar":
+        if isinstance(x, Decimal):
+            return ApproxDecimal(x, rel=self.rel, abs=self.abs, nan_ok=self.nan_ok)
+        return ApproxScalar(x, rel=self.rel, abs=self.abs, nan_ok=self.nan_ok)
+
+    def _yield_comparisons(self, actual):
+        """Yield all the pairs of numbers to be compared.
+
+        This is used to implement the `__eq__` method.
+        """
+        raise NotImplementedError
+
+    def _check_type(self) -> None:
+        """Raise a TypeError if the expected value is not a valid type."""
+        # This is only a concern if the expected value is a sequence.  In every
+        # other case, the approx() function ensures that the expected value has
+        # a numeric type.  For this reason, the default is to do nothing.  The
+        # classes that deal with sequences should reimplement this method to
+        # raise if there are any non-numeric elements in the sequence.
+
+
+def _recursive_sequence_map(f, x):
+    """Recursively map a function over a sequence of arbitrary depth"""
+    if isinstance(x, (list, tuple)):
+        seq_type = type(x)
+        return seq_type(_recursive_sequence_map(f, xi) for xi in x)
+    else:
+        return f(x)
+
+
+class ApproxNumpy(ApproxBase):
+    """Perform approximate comparisons where the expected value is numpy array."""
+
+    def __repr__(self) -> str:
+        list_scalars = _recursive_sequence_map(
+            self._approx_scalar, self.expected.tolist()
+        )
+        return f"approx({list_scalars!r})"
+
+    def _repr_compare(self, other_side: "ndarray") -> List[str]:
+        import itertools
+        import math
+
+        def get_value_from_nested_list(
+            nested_list: List[Any], nd_index: Tuple[Any, ...]
+        ) -> Any:
+            """
+            Helper function to get the value out of a nested list, given an n-dimensional index.
+            This mimics numpy's indexing, but for raw nested python lists.
+            """
+            value: Any = nested_list
+            for i in nd_index:
+                value = value[i]
+            return value
+
+        np_array_shape = self.expected.shape
+        approx_side_as_seq = _recursive_sequence_map(
+            self._approx_scalar, self.expected.tolist()
+        )
+
+        if np_array_shape != other_side.shape:
+            return [
+                "Impossible to compare arrays with different shapes.",
+                f"Shapes: {np_array_shape} and {other_side.shape}",
+            ]
+
+        number_of_elements = self.expected.size
+        max_abs_diff = -math.inf
+        max_rel_diff = -math.inf
+        different_ids = []
+        for index in itertools.product(*(range(i) for i in np_array_shape)):
+            approx_value = get_value_from_nested_list(approx_side_as_seq, index)
+            other_value = get_value_from_nested_list(other_side, index)
+            if approx_value != other_value:
+                abs_diff = abs(approx_value.expected - other_value)
+                max_abs_diff = max(max_abs_diff, abs_diff)
+                if other_value == 0.0:
+                    max_rel_diff = math.inf
+                else:
+                    max_rel_diff = max(max_rel_diff, abs_diff / abs(other_value))
+                different_ids.append(index)
+
+        message_data = [
+            (
+                str(index),
+                str(get_value_from_nested_list(other_side, index)),
+                str(get_value_from_nested_list(approx_side_as_seq, index)),
+            )
+            for index in different_ids
+        ]
+        return _compare_approx(
+            self.expected,
+            message_data,
+            number_of_elements,
+            different_ids,
+            max_abs_diff,
+            max_rel_diff,
+        )
+
+    def __eq__(self, actual) -> bool:
+        import numpy as np
+
+        # self.expected is supposed to always be an array here.
+
+        if not np.isscalar(actual):
+            try:
+                actual = np.asarray(actual)
+            except Exception as e:
+                raise TypeError(f"cannot compare '{actual}' to numpy.ndarray") from e
+
+        if not np.isscalar(actual) and actual.shape != self.expected.shape:
+            return False
+
+        return super().__eq__(actual)
+
+    def _yield_comparisons(self, actual):
+        import numpy as np
+
+        # `actual` can either be a numpy array or a scalar, it is treated in
+        # `__eq__` before being passed to `ApproxBase.__eq__`, which is the
+        # only method that calls this one.
+
+        if np.isscalar(actual):
+            for i in np.ndindex(self.expected.shape):
+                yield actual, self.expected[i].item()
+        else:
+            for i in np.ndindex(self.expected.shape):
+                yield actual[i].item(), self.expected[i].item()
+
+
+class ApproxMapping(ApproxBase):
+    """Perform approximate comparisons where the expected value is a mapping
+    with numeric values (the keys can be anything)."""
+
+    def __repr__(self) -> str:
+        return "approx({!r})".format(
+            {k: self._approx_scalar(v) for k, v in self.expected.items()}
+        )
+
+    def _repr_compare(self, other_side: Mapping[object, float]) -> List[str]:
+        import math
+
+        approx_side_as_map = {
+            k: self._approx_scalar(v) for k, v in self.expected.items()
+        }
+
+        number_of_elements = len(approx_side_as_map)
+        max_abs_diff = -math.inf
+        max_rel_diff = -math.inf
+        different_ids = []
+        for (approx_key, approx_value), other_value in zip(
+            approx_side_as_map.items(), other_side.values()
+        ):
+            if approx_value != other_value:
+                if approx_value.expected is not None and other_value is not None:
+                    max_abs_diff = max(
+                        max_abs_diff, abs(approx_value.expected - other_value)
+                    )
+                    if approx_value.expected == 0.0:
+                        max_rel_diff = math.inf
+                    else:
+                        max_rel_diff = max(
+                            max_rel_diff,
+                            abs(
+                                (approx_value.expected - other_value)
+                                / approx_value.expected
+                            ),
+                        )
+                different_ids.append(approx_key)
+
+        message_data = [
+            (str(key), str(other_side[key]), str(approx_side_as_map[key]))
+            for key in different_ids
+        ]
+
+        return _compare_approx(
+            self.expected,
+            message_data,
+            number_of_elements,
+            different_ids,
+            max_abs_diff,
+            max_rel_diff,
+        )
+
+    def __eq__(self, actual) -> bool:
+        try:
+            if set(actual.keys()) != set(self.expected.keys()):
+                return False
+        except AttributeError:
+            return False
+
+        return super().__eq__(actual)
+
+    def _yield_comparisons(self, actual):
+        for k in self.expected.keys():
+            yield actual[k], self.expected[k]
+
+    def _check_type(self) -> None:
+        __tracebackhide__ = True
+        for key, value in self.expected.items():
+            if isinstance(value, type(self.expected)):
+                msg = "pytest.approx() does not support nested dictionaries: key={!r} value={!r}\n  full mapping={}"
+                raise TypeError(msg.format(key, value, pprint.pformat(self.expected)))
+
+
+class ApproxSequenceLike(ApproxBase):
+    """Perform approximate comparisons where the expected value is a sequence of numbers."""
+
+    def __repr__(self) -> str:
+        seq_type = type(self.expected)
+        if seq_type not in (tuple, list):
+            seq_type = list
+        return "approx({!r})".format(
+            seq_type(self._approx_scalar(x) for x in self.expected)
+        )
+
+    def _repr_compare(self, other_side: Sequence[float]) -> List[str]:
+        import math
+
+        if len(self.expected) != len(other_side):
+            return [
+                "Impossible to compare lists with different sizes.",
+                f"Lengths: {len(self.expected)} and {len(other_side)}",
+            ]
+
+        approx_side_as_map = _recursive_sequence_map(self._approx_scalar, self.expected)
+
+        number_of_elements = len(approx_side_as_map)
+        max_abs_diff = -math.inf
+        max_rel_diff = -math.inf
+        different_ids = []
+        for i, (approx_value, other_value) in enumerate(
+            zip(approx_side_as_map, other_side)
+        ):
+            if approx_value != other_value:
+                abs_diff = abs(approx_value.expected - other_value)
+                max_abs_diff = max(max_abs_diff, abs_diff)
+                if other_value == 0.0:
+                    max_rel_diff = math.inf
+                else:
+                    max_rel_diff = max(max_rel_diff, abs_diff / abs(other_value))
+                different_ids.append(i)
+
+        message_data = [
+            (str(i), str(other_side[i]), str(approx_side_as_map[i]))
+            for i in different_ids
+        ]
+
+        return _compare_approx(
+            self.expected,
+            message_data,
+            number_of_elements,
+            different_ids,
+            max_abs_diff,
+            max_rel_diff,
+        )
+
+    def __eq__(self, actual) -> bool:
+        try:
+            if len(actual) != len(self.expected):
+                return False
+        except TypeError:
+            return False
+        return super().__eq__(actual)
+
+    def _yield_comparisons(self, actual):
+        return zip(actual, self.expected)
+
+    def _check_type(self) -> None:
+        __tracebackhide__ = True
+        for index, x in enumerate(self.expected):
+            if isinstance(x, type(self.expected)):
+                msg = "pytest.approx() does not support nested data structures: {!r} at index {}\n  full sequence: {}"
+                raise TypeError(msg.format(x, index, pprint.pformat(self.expected)))
+
+
+class ApproxScalar(ApproxBase):
+    """Perform approximate comparisons where the expected value is a single number."""
+
+    # Using Real should be better than this Union, but not possible yet:
+    # https://github.com/python/typeshed/pull/3108
+    DEFAULT_ABSOLUTE_TOLERANCE: Union[float, Decimal] = 1e-12
+    DEFAULT_RELATIVE_TOLERANCE: Union[float, Decimal] = 1e-6
+
+    def __repr__(self) -> str:
+        """Return a string communicating both the expected value and the
+        tolerance for the comparison being made.
+
+        For example, ``1.0 ± 1e-6``, ``(3+4j) ± 5e-6 ∠ ±180°``.
+        """
+        # Don't show a tolerance for values that aren't compared using
+        # tolerances, i.e. non-numerics and infinities. Need to call abs to
+        # handle complex numbers, e.g. (inf + 1j).
+        if (not isinstance(self.expected, (Complex, Decimal))) or math.isinf(
+            abs(self.expected)  # type: ignore[arg-type]
+        ):
+            return str(self.expected)
+
+        # If a sensible tolerance can't be calculated, self.tolerance will
+        # raise a ValueError.  In this case, display '???'.
+        try:
+            vetted_tolerance = f"{self.tolerance:.1e}"
+            if (
+                isinstance(self.expected, Complex)
+                and self.expected.imag
+                and not math.isinf(self.tolerance)
+            ):
+                vetted_tolerance += " ∠ ±180°"
+        except ValueError:
+            vetted_tolerance = "???"
+
+        return f"{self.expected} ± {vetted_tolerance}"
+
+    def __eq__(self, actual) -> bool:
+        """Return whether the given value is equal to the expected value
+        within the pre-specified tolerance."""
+        asarray = _as_numpy_array(actual)
+        if asarray is not None:
+            # Call ``__eq__()`` manually to prevent infinite-recursion with
+            # numpy<1.13.  See #3748.
+            return all(self.__eq__(a) for a in asarray.flat)
+
+        # Short-circuit exact equality.
+        if actual == self.expected:
+            return True
+
+        # If either type is non-numeric, fall back to strict equality.
+        # NB: we need Complex, rather than just Number, to ensure that __abs__,
+        # __sub__, and __float__ are defined.
+        if not (
+            isinstance(self.expected, (Complex, Decimal))
+            and isinstance(actual, (Complex, Decimal))
+        ):
+            return False
+
+        # Allow the user to control whether NaNs are considered equal to each
+        # other or not.  The abs() calls are for compatibility with complex
+        # numbers.
+        if math.isnan(abs(self.expected)):  # type: ignore[arg-type]
+            return self.nan_ok and math.isnan(abs(actual))  # type: ignore[arg-type]
+
+        # Infinity shouldn't be approximately equal to anything but itself, but
+        # if there's a relative tolerance, it will be infinite and infinity
+        # will seem approximately equal to everything.  The equal-to-itself
+        # case would have been short circuited above, so here we can just
+        # return false if the expected value is infinite.  The abs() call is
+        # for compatibility with complex numbers.
+        if math.isinf(abs(self.expected)):  # type: ignore[arg-type]
+            return False
+
+        # Return true if the two numbers are within the tolerance.
+        result: bool = abs(self.expected - actual) <= self.tolerance
+        return result
+
+    # Ignore type because of https://github.com/python/mypy/issues/4266.
+    __hash__ = None  # type: ignore
+
+    @property
+    def tolerance(self):
+        """Return the tolerance for the comparison.
+
+        This could be either an absolute tolerance or a relative tolerance,
+        depending on what the user specified or which would be larger.
+        """
+
+        def set_default(x, default):
+            return x if x is not None else default
+
+        # Figure out what the absolute tolerance should be.  ``self.abs`` is
+        # either None or a value specified by the user.
+        absolute_tolerance = set_default(self.abs, self.DEFAULT_ABSOLUTE_TOLERANCE)
+
+        if absolute_tolerance < 0:
+            raise ValueError(
+                f"absolute tolerance can't be negative: {absolute_tolerance}"
+            )
+        if math.isnan(absolute_tolerance):
+            raise ValueError("absolute tolerance can't be NaN.")
+
+        # If the user specified an absolute tolerance but not a relative one,
+        # just return the absolute tolerance.
+        if self.rel is None:
+            if self.abs is not None:
+                return absolute_tolerance
+
+        # Figure out what the relative tolerance should be.  ``self.rel`` is
+        # either None or a value specified by the user.  This is done after
+        # we've made sure the user didn't ask for an absolute tolerance only,
+        # because we don't want to raise errors about the relative tolerance if
+        # we aren't even going to use it.
+        relative_tolerance = set_default(
+            self.rel, self.DEFAULT_RELATIVE_TOLERANCE
+        ) * abs(self.expected)
+
+        if relative_tolerance < 0:
+            raise ValueError(
+                f"relative tolerance can't be negative: {relative_tolerance}"
+            )
+        if math.isnan(relative_tolerance):
+            raise ValueError("relative tolerance can't be NaN.")
+
+        # Return the larger of the relative and absolute tolerances.
+        return max(relative_tolerance, absolute_tolerance)
+
+
+class ApproxDecimal(ApproxScalar):
+    """Perform approximate comparisons where the expected value is a Decimal."""
+
+    DEFAULT_ABSOLUTE_TOLERANCE = Decimal("1e-12")
+    DEFAULT_RELATIVE_TOLERANCE = Decimal("1e-6")
+
+
+def approx(expected, rel=None, abs=None, nan_ok: bool = False) -> ApproxBase:
+    """Assert that two numbers (or two ordered sequences of numbers) are equal to each other
+    within some tolerance.
+
+    Due to the :doc:`python:tutorial/floatingpoint`, numbers that we
+    would intuitively expect to be equal are not always so::
+
+        >>> 0.1 + 0.2 == 0.3
+        False
+
+    This problem is commonly encountered when writing tests, e.g. when making
+    sure that floating-point values are what you expect them to be.  One way to
+    deal with this problem is to assert that two floating-point numbers are
+    equal to within some appropriate tolerance::
+
+        >>> abs((0.1 + 0.2) - 0.3) < 1e-6
+        True
+
+    However, comparisons like this are tedious to write and difficult to
+    understand.  Furthermore, absolute comparisons like the one above are
+    usually discouraged because there's no tolerance that works well for all
+    situations.  ``1e-6`` is good for numbers around ``1``, but too small for
+    very big numbers and too big for very small ones.  It's better to express
+    the tolerance as a fraction of the expected value, but relative comparisons
+    like that are even more difficult to write correctly and concisely.
+
+    The ``approx`` class performs floating-point comparisons using a syntax
+    that's as intuitive as possible::
+
+        >>> from pytest import approx
+        >>> 0.1 + 0.2 == approx(0.3)
+        True
+
+    The same syntax also works for ordered sequences of numbers::
+
+        >>> (0.1 + 0.2, 0.2 + 0.4) == approx((0.3, 0.6))
+        True
+
+    ``numpy`` arrays::
+
+        >>> import numpy as np                                                          # doctest: +SKIP
+        >>> np.array([0.1, 0.2]) + np.array([0.2, 0.4]) == approx(np.array([0.3, 0.6])) # doctest: +SKIP
+        True
+
+    And for a ``numpy`` array against a scalar::
+
+        >>> import numpy as np                                         # doctest: +SKIP
+        >>> np.array([0.1, 0.2]) + np.array([0.2, 0.1]) == approx(0.3) # doctest: +SKIP
+        True
+
+    Only ordered sequences are supported, because ``approx`` needs
+    to infer the relative position of the sequences without ambiguity. This means
+    ``sets`` and other unordered sequences are not supported.
+
+    Finally, dictionary *values* can also be compared::
+
+        >>> {'a': 0.1 + 0.2, 'b': 0.2 + 0.4} == approx({'a': 0.3, 'b': 0.6})
+        True
+
+    The comparison will be true if both mappings have the same keys and their
+    respective values match the expected tolerances.
+
+    **Tolerances**
+
+    By default, ``approx`` considers numbers within a relative tolerance of
+    ``1e-6`` (i.e. one part in a million) of its expected value to be equal.
+    This treatment would lead to surprising results if the expected value was
+    ``0.0``, because nothing but ``0.0`` itself is relatively close to ``0.0``.
+    To handle this case less surprisingly, ``approx`` also considers numbers
+    within an absolute tolerance of ``1e-12`` of its expected value to be
+    equal.  Infinity and NaN are special cases.  Infinity is only considered
+    equal to itself, regardless of the relative tolerance.  NaN is not
+    considered equal to anything by default, but you can make it be equal to
+    itself by setting the ``nan_ok`` argument to True.  (This is meant to
+    facilitate comparing arrays that use NaN to mean "no data".)
+
+    Both the relative and absolute tolerances can be changed by passing
+    arguments to the ``approx`` constructor::
+
+        >>> 1.0001 == approx(1)
+        False
+        >>> 1.0001 == approx(1, rel=1e-3)
+        True
+        >>> 1.0001 == approx(1, abs=1e-3)
+        True
+
+    If you specify ``abs`` but not ``rel``, the comparison will not consider
+    the relative tolerance at all.  In other words, two numbers that are within
+    the default relative tolerance of ``1e-6`` will still be considered unequal
+    if they exceed the specified absolute tolerance.  If you specify both
+    ``abs`` and ``rel``, the numbers will be considered equal if either
+    tolerance is met::
+
+        >>> 1 + 1e-8 == approx(1)
+        True
+        >>> 1 + 1e-8 == approx(1, abs=1e-12)
+        False
+        >>> 1 + 1e-8 == approx(1, rel=1e-6, abs=1e-12)
+        True
+
+    You can also use ``approx`` to compare nonnumeric types, or dicts and
+    sequences containing nonnumeric types, in which case it falls back to
+    strict equality. This can be useful for comparing dicts and sequences that
+    can contain optional values::
+
+        >>> {"required": 1.0000005, "optional": None} == approx({"required": 1, "optional": None})
+        True
+        >>> [None, 1.0000005] == approx([None,1])
+        True
+        >>> ["foo", 1.0000005] == approx([None,1])
+        False
+
+    If you're thinking about using ``approx``, then you might want to know how
+    it compares to other good ways of comparing floating-point numbers.  All of
+    these algorithms are based on relative and absolute tolerances and should
+    agree for the most part, but they do have meaningful differences:
+
+    - ``math.isclose(a, b, rel_tol=1e-9, abs_tol=0.0)``:  True if the relative
+      tolerance is met w.r.t. either ``a`` or ``b`` or if the absolute
+      tolerance is met.  Because the relative tolerance is calculated w.r.t.
+      both ``a`` and ``b``, this test is symmetric (i.e.  neither ``a`` nor
+      ``b`` is a "reference value").  You have to specify an absolute tolerance
+      if you want to compare to ``0.0`` because there is no tolerance by
+      default.  More information: :py:func:`math.isclose`.
+
+    - ``numpy.isclose(a, b, rtol=1e-5, atol=1e-8)``: True if the difference
+      between ``a`` and ``b`` is less that the sum of the relative tolerance
+      w.r.t. ``b`` and the absolute tolerance.  Because the relative tolerance
+      is only calculated w.r.t. ``b``, this test is asymmetric and you can
+      think of ``b`` as the reference value.  Support for comparing sequences
+      is provided by :py:func:`numpy.allclose`.  More information:
+      :std:doc:`numpy:reference/generated/numpy.isclose`.
+
+    - ``unittest.TestCase.assertAlmostEqual(a, b)``: True if ``a`` and ``b``
+      are within an absolute tolerance of ``1e-7``.  No relative tolerance is
+      considered , so this function is not appropriate for very large or very
+      small numbers.  Also, it's only available in subclasses of ``unittest.TestCase``
+      and it's ugly because it doesn't follow PEP8.  More information:
+      :py:meth:`unittest.TestCase.assertAlmostEqual`.
+
+    - ``a == pytest.approx(b, rel=1e-6, abs=1e-12)``: True if the relative
+      tolerance is met w.r.t. ``b`` or if the absolute tolerance is met.
+      Because the relative tolerance is only calculated w.r.t. ``b``, this test
+      is asymmetric and you can think of ``b`` as the reference value.  In the
+      special case that you explicitly specify an absolute tolerance but not a
+      relative tolerance, only the absolute tolerance is considered.
+
+    .. note::
+
+        ``approx`` can handle numpy arrays, but we recommend the
+        specialised test helpers in :std:doc:`numpy:reference/routines.testing`
+        if you need support for comparisons, NaNs, or ULP-based tolerances.
+
+        To match strings using regex, you can use
+        `Matches <https://github.com/asottile/re-assert#re_assertmatchespattern-str-args-kwargs>`_
+        from the
+        `re_assert package <https://github.com/asottile/re-assert>`_.
+
+    .. warning::
+
+       .. versionchanged:: 3.2
+
+       In order to avoid inconsistent behavior, :py:exc:`TypeError` is
+       raised for ``>``, ``>=``, ``<`` and ``<=`` comparisons.
+       The example below illustrates the problem::
+
+           assert approx(0.1) > 0.1 + 1e-10  # calls approx(0.1).__gt__(0.1 + 1e-10)
+           assert 0.1 + 1e-10 > approx(0.1)  # calls approx(0.1).__lt__(0.1 + 1e-10)
+
+       In the second example one expects ``approx(0.1).__le__(0.1 + 1e-10)``
+       to be called. But instead, ``approx(0.1).__lt__(0.1 + 1e-10)`` is used to
+       comparison. This is because the call hierarchy of rich comparisons
+       follows a fixed behavior. More information: :py:meth:`object.__ge__`
+
+    .. versionchanged:: 3.7.1
+       ``approx`` raises ``TypeError`` when it encounters a dict value or
+       sequence element of nonnumeric type.
+
+    .. versionchanged:: 6.1.0
+       ``approx`` falls back to strict equality for nonnumeric types instead
+       of raising ``TypeError``.
+    """
+
+    # Delegate the comparison to a class that knows how to deal with the type
+    # of the expected value (e.g. int, float, list, dict, numpy.array, etc).
+    #
+    # The primary responsibility of these classes is to implement ``__eq__()``
+    # and ``__repr__()``.  The former is used to actually check if some
+    # "actual" value is equivalent to the given expected value within the
+    # allowed tolerance.  The latter is used to show the user the expected
+    # value and tolerance, in the case that a test failed.
+    #
+    # The actual logic for making approximate comparisons can be found in
+    # ApproxScalar, which is used to compare individual numbers.  All of the
+    # other Approx classes eventually delegate to this class.  The ApproxBase
+    # class provides some convenient methods and overloads, but isn't really
+    # essential.
+
+    __tracebackhide__ = True
+
+    if isinstance(expected, Decimal):
+        cls: Type[ApproxBase] = ApproxDecimal
+    elif isinstance(expected, Mapping):
+        cls = ApproxMapping
+    elif _is_numpy_array(expected):
+        expected = _as_numpy_array(expected)
+        cls = ApproxNumpy
+    elif (
+        hasattr(expected, "__getitem__")
+        and isinstance(expected, Sized)
+        # Type ignored because the error is wrong -- not unreachable.
+        and not isinstance(expected, STRING_TYPES)  # type: ignore[unreachable]
+    ):
+        cls = ApproxSequenceLike
+    elif (
+        isinstance(expected, Collection)
+        # Type ignored because the error is wrong -- not unreachable.
+        and not isinstance(expected, STRING_TYPES)  # type: ignore[unreachable]
+    ):
+        msg = f"pytest.approx() only supports ordered sequences, but got: {repr(expected)}"
+        raise TypeError(msg)
+    else:
+        cls = ApproxScalar
+
+    return cls(expected, rel, abs, nan_ok)
+
+
+def _is_numpy_array(obj: object) -> bool:
+    """
+    Return true if the given object is implicitly convertible to ndarray,
+    and numpy is already imported.
+    """
+    return _as_numpy_array(obj) is not None
+
+
+def _as_numpy_array(obj: object) -> Optional["ndarray"]:
+    """
+    Return an ndarray if the given object is implicitly convertible to ndarray,
+    and numpy is already imported, otherwise None.
+    """
+    import sys
+
+    np: Any = sys.modules.get("numpy")
+    if np is not None:
+        # avoid infinite recursion on numpy scalars, which have __array__
+        if np.isscalar(obj):
+            return None
+        elif isinstance(obj, np.ndarray):
+            return obj
+        elif hasattr(obj, "__array__") or hasattr("obj", "__array_interface__"):
+            return np.asarray(obj)
+    return None
+
+
+# builtin pytest.raises helper
+
+E = TypeVar("E", bound=BaseException)
+
+
+@overload
+def raises(
+    expected_exception: Union[Type[E], Tuple[Type[E], ...]],
+    *,
+    match: Optional[Union[str, Pattern[str]]] = ...,
+) -> "RaisesContext[E]":
+    ...
+
+
+@overload
+def raises(  # noqa: F811
+    expected_exception: Union[Type[E], Tuple[Type[E], ...]],
+    func: Callable[..., Any],
+    *args: Any,
+    **kwargs: Any,
+) -> _pytest._code.ExceptionInfo[E]:
+    ...
+
+
+def raises(  # noqa: F811
+    expected_exception: Union[Type[E], Tuple[Type[E], ...]], *args: Any, **kwargs: Any
+) -> Union["RaisesContext[E]", _pytest._code.ExceptionInfo[E]]:
+    r"""Assert that a code block/function call raises an exception.
+
+    :param typing.Type[E] | typing.Tuple[typing.Type[E], ...] expected_exception:
+        The expected exception type, or a tuple if one of multiple possible
+        exception types are expected.
+    :kwparam str | typing.Pattern[str] | None match:
+        If specified, a string containing a regular expression,
+        or a regular expression object, that is tested against the string
+        representation of the exception using :func:`re.search`.
+
+        To match a literal string that may contain :ref:`special characters
+        <re-syntax>`, the pattern can first be escaped with :func:`re.escape`.
+
+        (This is only used when :py:func:`pytest.raises` is used as a context manager,
+        and passed through to the function otherwise.
+        When using :py:func:`pytest.raises` as a function, you can use:
+        ``pytest.raises(Exc, func, match="passed on").match("my pattern")``.)
+
+    .. currentmodule:: _pytest._code
+
+    Use ``pytest.raises`` as a context manager, which will capture the exception of the given
+    type::
+
+        >>> import pytest
+        >>> with pytest.raises(ZeroDivisionError):
+        ...    1/0
+
+    If the code block does not raise the expected exception (``ZeroDivisionError`` in the example
+    above), or no exception at all, the check will fail instead.
+
+    You can also use the keyword argument ``match`` to assert that the
+    exception matches a text or regex::
+
+        >>> with pytest.raises(ValueError, match='must be 0 or None'):
+        ...     raise ValueError("value must be 0 or None")
+
+        >>> with pytest.raises(ValueError, match=r'must be \d+$'):
+        ...     raise ValueError("value must be 42")
+
+    The context manager produces an :class:`ExceptionInfo` object which can be used to inspect the
+    details of the captured exception::
+
+        >>> with pytest.raises(ValueError) as exc_info:
+        ...     raise ValueError("value must be 42")
+        >>> assert exc_info.type is ValueError
+        >>> assert exc_info.value.args[0] == "value must be 42"
+
+    .. note::
+
+       When using ``pytest.raises`` as a context manager, it's worthwhile to
+       note that normal context manager rules apply and that the exception
+       raised *must* be the final line in the scope of the context manager.
+       Lines of code after that, within the scope of the context manager will
+       not be executed. For example::
+
+           >>> value = 15
+           >>> with pytest.raises(ValueError) as exc_info:
+           ...     if value > 10:
+           ...         raise ValueError("value must be <= 10")
+           ...     assert exc_info.type is ValueError  # this will not execute
+
+       Instead, the following approach must be taken (note the difference in
+       scope)::
+
+           >>> with pytest.raises(ValueError) as exc_info:
+           ...     if value > 10:
+           ...         raise ValueError("value must be <= 10")
+           ...
+           >>> assert exc_info.type is ValueError
+
+    **Using with** ``pytest.mark.parametrize``
+
+    When using :ref:`pytest.mark.parametrize ref`
+    it is possible to parametrize tests such that
+    some runs raise an exception and others do not.
+
+    See :ref:`parametrizing_conditional_raising` for an example.
+
+    **Legacy form**
+
+    It is possible to specify a callable by passing a to-be-called lambda::
+
+        >>> raises(ZeroDivisionError, lambda: 1/0)
+        <ExceptionInfo ...>
+
+    or you can specify an arbitrary callable with arguments::
+
+        >>> def f(x): return 1/x
+        ...
+        >>> raises(ZeroDivisionError, f, 0)
+        <ExceptionInfo ...>
+        >>> raises(ZeroDivisionError, f, x=0)
+        <ExceptionInfo ...>
+
+    The form above is fully supported but discouraged for new code because the
+    context manager form is regarded as more readable and less error-prone.
+
+    .. note::
+        Similar to caught exception objects in Python, explicitly clearing
+        local references to returned ``ExceptionInfo`` objects can
+        help the Python interpreter speed up its garbage collection.
+
+        Clearing those references breaks a reference cycle
+        (``ExceptionInfo`` --> caught exception --> frame stack raising
+        the exception --> current frame stack --> local variables -->
+        ``ExceptionInfo``) which makes Python keep all objects referenced
+        from that cycle (including all local variables in the current
+        frame) alive until the next cyclic garbage collection run.
+        More detailed information can be found in the official Python
+        documentation for :ref:`the try statement <python:try>`.
+    """
+    __tracebackhide__ = True
+
+    if not expected_exception:
+        raise ValueError(
+            f"Expected an exception type or a tuple of exception types, but got `{expected_exception!r}`. "
+            f"Raising exceptions is already understood as failing the test, so you don't need "
+            f"any special code to say 'this should never raise an exception'."
+        )
+    if isinstance(expected_exception, type):
+        expected_exceptions: Tuple[Type[E], ...] = (expected_exception,)
+    else:
+        expected_exceptions = expected_exception
+    for exc in expected_exceptions:
+        if not isinstance(exc, type) or not issubclass(exc, BaseException):
+            msg = "expected exception must be a BaseException type, not {}"  # type: ignore[unreachable]
+            not_a = exc.__name__ if isinstance(exc, type) else type(exc).__name__
+            raise TypeError(msg.format(not_a))
+
+    message = f"DID NOT RAISE {expected_exception}"
+
+    if not args:
+        match: Optional[Union[str, Pattern[str]]] = kwargs.pop("match", None)
+        if kwargs:
+            msg = "Unexpected keyword arguments passed to pytest.raises: "
+            msg += ", ".join(sorted(kwargs))
+            msg += "\nUse context-manager form instead?"
+            raise TypeError(msg)
+        return RaisesContext(expected_exception, message, match)
+    else:
+        func = args[0]
+        if not callable(func):
+            raise TypeError(f"{func!r} object (type: {type(func)}) must be callable")
+        try:
+            func(*args[1:], **kwargs)
+        except expected_exception as e:
+            return _pytest._code.ExceptionInfo.from_exception(e)
+    fail(message)
+
+
+# This doesn't work with mypy for now. Use fail.Exception instead.
+raises.Exception = fail.Exception  # type: ignore
+
+
+@final
+class RaisesContext(ContextManager[_pytest._code.ExceptionInfo[E]]):
+    def __init__(
+        self,
+        expected_exception: Union[Type[E], Tuple[Type[E], ...]],
+        message: str,
+        match_expr: Optional[Union[str, Pattern[str]]] = None,
+    ) -> None:
+        self.expected_exception = expected_exception
+        self.message = message
+        self.match_expr = match_expr
+        self.excinfo: Optional[_pytest._code.ExceptionInfo[E]] = None
+
+    def __enter__(self) -> _pytest._code.ExceptionInfo[E]:
+        self.excinfo = _pytest._code.ExceptionInfo.for_later()
+        return self.excinfo
+
+    def __exit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        exc_tb: Optional[TracebackType],
+    ) -> bool:
+        __tracebackhide__ = True
+        if exc_type is None:
+            fail(self.message)
+        assert self.excinfo is not None
+        if not issubclass(exc_type, self.expected_exception):
+            return False
+        # Cast to narrow the exception type now that it's verified.
+        exc_info = cast(Tuple[Type[E], E, TracebackType], (exc_type, exc_val, exc_tb))
+        self.excinfo.fill_unfilled(exc_info)
+        if self.match_expr is not None:
+            self.excinfo.match(self.match_expr)
+        return True
diff --git a/contrib/python/pytest/py3/_pytest/python_path.py b/contrib/python/pytest/py3/_pytest/python_path.py
new file mode 100644
index 0000000000..cceabbca12
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/python_path.py
@@ -0,0 +1,24 @@
+import sys
+
+import pytest
+from pytest import Config
+from pytest import Parser
+
+
+def pytest_addoption(parser: Parser) -> None:
+    parser.addini("pythonpath", type="paths", help="Add paths to sys.path", default=[])
+
+
+@pytest.hookimpl(tryfirst=True)
+def pytest_load_initial_conftests(early_config: Config) -> None:
+    # `pythonpath = a b` will set `sys.path` to `[a, b, x, y, z, ...]`
+    for path in reversed(early_config.getini("pythonpath")):
+        sys.path.insert(0, str(path))
+
+
+@pytest.hookimpl(trylast=True)
+def pytest_unconfigure(config: Config) -> None:
+    for path in config.getini("pythonpath"):
+        path_str = str(path)
+        if path_str in sys.path:
+            sys.path.remove(path_str)
diff --git a/contrib/python/pytest/py3/_pytest/recwarn.py b/contrib/python/pytest/py3/_pytest/recwarn.py
new file mode 100644
index 0000000000..d76ea020f1
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/recwarn.py
@@ -0,0 +1,313 @@
+"""Record warnings during test function execution."""
+import re
+import warnings
+from pprint import pformat
+from types import TracebackType
+from typing import Any
+from typing import Callable
+from typing import Generator
+from typing import Iterator
+from typing import List
+from typing import Optional
+from typing import Pattern
+from typing import Tuple
+from typing import Type
+from typing import TypeVar
+from typing import Union
+
+from _pytest.compat import final
+from _pytest.compat import overload
+from _pytest.deprecated import check_ispytest
+from _pytest.deprecated import WARNS_NONE_ARG
+from _pytest.fixtures import fixture
+from _pytest.outcomes import fail
+
+
+T = TypeVar("T")
+
+
+@fixture
+def recwarn() -> Generator["WarningsRecorder", None, None]:
+    """Return a :class:`WarningsRecorder` instance that records all warnings emitted by test functions.
+
+    See https://docs.pytest.org/en/latest/how-to/capture-warnings.html for information
+    on warning categories.
+    """
+    wrec = WarningsRecorder(_ispytest=True)
+    with wrec:
+        warnings.simplefilter("default")
+        yield wrec
+
+
+@overload
+def deprecated_call(
+    *, match: Optional[Union[str, Pattern[str]]] = ...
+) -> "WarningsRecorder":
+    ...
+
+
+@overload
+def deprecated_call(  # noqa: F811
+    func: Callable[..., T], *args: Any, **kwargs: Any
+) -> T:
+    ...
+
+
+def deprecated_call(  # noqa: F811
+    func: Optional[Callable[..., Any]] = None, *args: Any, **kwargs: Any
+) -> Union["WarningsRecorder", Any]:
+    """Assert that code produces a ``DeprecationWarning`` or ``PendingDeprecationWarning``.
+
+    This function can be used as a context manager::
+
+        >>> import warnings
+        >>> def api_call_v2():
+        ...     warnings.warn('use v3 of this api', DeprecationWarning)
+        ...     return 200
+
+        >>> import pytest
+        >>> with pytest.deprecated_call():
+        ...    assert api_call_v2() == 200
+
+    It can also be used by passing a function and ``*args`` and ``**kwargs``,
+    in which case it will ensure calling ``func(*args, **kwargs)`` produces one of
+    the warnings types above. The return value is the return value of the function.
+
+    In the context manager form you may use the keyword argument ``match`` to assert
+    that the warning matches a text or regex.
+
+    The context manager produces a list of :class:`warnings.WarningMessage` objects,
+    one for each warning raised.
+    """
+    __tracebackhide__ = True
+    if func is not None:
+        args = (func,) + args
+    return warns((DeprecationWarning, PendingDeprecationWarning), *args, **kwargs)
+
+
+@overload
+def warns(
+    expected_warning: Union[Type[Warning], Tuple[Type[Warning], ...]] = ...,
+    *,
+    match: Optional[Union[str, Pattern[str]]] = ...,
+) -> "WarningsChecker":
+    ...
+
+
+@overload
+def warns(  # noqa: F811
+    expected_warning: Union[Type[Warning], Tuple[Type[Warning], ...]],
+    func: Callable[..., T],
+    *args: Any,
+    **kwargs: Any,
+) -> T:
+    ...
+
+
+def warns(  # noqa: F811
+    expected_warning: Union[Type[Warning], Tuple[Type[Warning], ...]] = Warning,
+    *args: Any,
+    match: Optional[Union[str, Pattern[str]]] = None,
+    **kwargs: Any,
+) -> Union["WarningsChecker", Any]:
+    r"""Assert that code raises a particular class of warning.
+
+    Specifically, the parameter ``expected_warning`` can be a warning class or sequence
+    of warning classes, and the code inside the ``with`` block must issue at least one
+    warning of that class or classes.
+
+    This helper produces a list of :class:`warnings.WarningMessage` objects, one for
+    each warning raised (regardless of whether it is an ``expected_warning`` or not).
+
+    This function can be used as a context manager, which will capture all the raised
+    warnings inside it::
+
+        >>> import pytest
+        >>> with pytest.warns(RuntimeWarning):
+        ...    warnings.warn("my warning", RuntimeWarning)
+
+    In the context manager form you may use the keyword argument ``match`` to assert
+    that the warning matches a text or regex::
+
+        >>> with pytest.warns(UserWarning, match='must be 0 or None'):
+        ...     warnings.warn("value must be 0 or None", UserWarning)
+
+        >>> with pytest.warns(UserWarning, match=r'must be \d+$'):
+        ...     warnings.warn("value must be 42", UserWarning)
+
+        >>> with pytest.warns(UserWarning, match=r'must be \d+$'):
+        ...     warnings.warn("this is not here", UserWarning)
+        Traceback (most recent call last):
+          ...
+        Failed: DID NOT WARN. No warnings of type ...UserWarning... were emitted...
+
+    **Using with** ``pytest.mark.parametrize``
+
+    When using :ref:`pytest.mark.parametrize ref` it is possible to parametrize tests
+    such that some runs raise a warning and others do not.
+
+    This could be achieved in the same way as with exceptions, see
+    :ref:`parametrizing_conditional_raising` for an example.
+
+    """
+    __tracebackhide__ = True
+    if not args:
+        if kwargs:
+            argnames = ", ".join(sorted(kwargs))
+            raise TypeError(
+                f"Unexpected keyword arguments passed to pytest.warns: {argnames}"
+                "\nUse context-manager form instead?"
+            )
+        return WarningsChecker(expected_warning, match_expr=match, _ispytest=True)
+    else:
+        func = args[0]
+        if not callable(func):
+            raise TypeError(f"{func!r} object (type: {type(func)}) must be callable")
+        with WarningsChecker(expected_warning, _ispytest=True):
+            return func(*args[1:], **kwargs)
+
+
+class WarningsRecorder(warnings.catch_warnings):  # type:ignore[type-arg]
+    """A context manager to record raised warnings.
+
+    Each recorded warning is an instance of :class:`warnings.WarningMessage`.
+
+    Adapted from `warnings.catch_warnings`.
+
+    .. note::
+        ``DeprecationWarning`` and ``PendingDeprecationWarning`` are treated
+        differently; see :ref:`ensuring_function_triggers`.
+
+    """
+
+    def __init__(self, *, _ispytest: bool = False) -> None:
+        check_ispytest(_ispytest)
+        # Type ignored due to the way typeshed handles warnings.catch_warnings.
+        super().__init__(record=True)  # type: ignore[call-arg]
+        self._entered = False
+        self._list: List[warnings.WarningMessage] = []
+
+    @property
+    def list(self) -> List["warnings.WarningMessage"]:
+        """The list of recorded warnings."""
+        return self._list
+
+    def __getitem__(self, i: int) -> "warnings.WarningMessage":
+        """Get a recorded warning by index."""
+        return self._list[i]
+
+    def __iter__(self) -> Iterator["warnings.WarningMessage"]:
+        """Iterate through the recorded warnings."""
+        return iter(self._list)
+
+    def __len__(self) -> int:
+        """The number of recorded warnings."""
+        return len(self._list)
+
+    def pop(self, cls: Type[Warning] = Warning) -> "warnings.WarningMessage":
+        """Pop the first recorded warning, raise exception if not exists."""
+        for i, w in enumerate(self._list):
+            if issubclass(w.category, cls):
+                return self._list.pop(i)
+        __tracebackhide__ = True
+        raise AssertionError(f"{cls!r} not found in warning list")
+
+    def clear(self) -> None:
+        """Clear the list of recorded warnings."""
+        self._list[:] = []
+
+    # Type ignored because it doesn't exactly warnings.catch_warnings.__enter__
+    # -- it returns a List but we only emulate one.
+    def __enter__(self) -> "WarningsRecorder":  # type: ignore
+        if self._entered:
+            __tracebackhide__ = True
+            raise RuntimeError(f"Cannot enter {self!r} twice")
+        _list = super().__enter__()
+        # record=True means it's None.
+        assert _list is not None
+        self._list = _list
+        warnings.simplefilter("always")
+        return self
+
+    def __exit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        exc_tb: Optional[TracebackType],
+    ) -> None:
+        if not self._entered:
+            __tracebackhide__ = True
+            raise RuntimeError(f"Cannot exit {self!r} without entering first")
+
+        super().__exit__(exc_type, exc_val, exc_tb)
+
+        # Built-in catch_warnings does not reset entered state so we do it
+        # manually here for this context manager to become reusable.
+        self._entered = False
+
+
+@final
+class WarningsChecker(WarningsRecorder):
+    def __init__(
+        self,
+        expected_warning: Optional[
+            Union[Type[Warning], Tuple[Type[Warning], ...]]
+        ] = Warning,
+        match_expr: Optional[Union[str, Pattern[str]]] = None,
+        *,
+        _ispytest: bool = False,
+    ) -> None:
+        check_ispytest(_ispytest)
+        super().__init__(_ispytest=True)
+
+        msg = "exceptions must be derived from Warning, not %s"
+        if expected_warning is None:
+            warnings.warn(WARNS_NONE_ARG, stacklevel=4)
+            expected_warning_tup = None
+        elif isinstance(expected_warning, tuple):
+            for exc in expected_warning:
+                if not issubclass(exc, Warning):
+                    raise TypeError(msg % type(exc))
+            expected_warning_tup = expected_warning
+        elif issubclass(expected_warning, Warning):
+            expected_warning_tup = (expected_warning,)
+        else:
+            raise TypeError(msg % type(expected_warning))
+
+        self.expected_warning = expected_warning_tup
+        self.match_expr = match_expr
+
+    def __exit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        exc_tb: Optional[TracebackType],
+    ) -> None:
+        super().__exit__(exc_type, exc_val, exc_tb)
+
+        __tracebackhide__ = True
+
+        def found_str():
+            return pformat([record.message for record in self], indent=2)
+
+        # only check if we're not currently handling an exception
+        if exc_type is None and exc_val is None and exc_tb is None:
+            if self.expected_warning is not None:
+                if not any(issubclass(r.category, self.expected_warning) for r in self):
+                    __tracebackhide__ = True
+                    fail(
+                        f"DID NOT WARN. No warnings of type {self.expected_warning} were emitted.\n"
+                        f"The list of emitted warnings is: {found_str()}."
+                    )
+                elif self.match_expr is not None:
+                    for r in self:
+                        if issubclass(r.category, self.expected_warning):
+                            if re.compile(self.match_expr).search(str(r.message)):
+                                break
+                    else:
+                        fail(
+                            f"""\
+DID NOT WARN. No warnings of type {self.expected_warning} matching the regex were emitted.
+ Regex: {self.match_expr}
+ Emitted warnings: {found_str()}"""
+                        )
diff --git a/contrib/python/pytest/py3/_pytest/reports.py b/contrib/python/pytest/py3/_pytest/reports.py
new file mode 100644
index 0000000000..74e8794b23
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/reports.py
@@ -0,0 +1,622 @@
+import dataclasses
+import os
+from io import StringIO
+from pprint import pprint
+from typing import Any
+from typing import cast
+from typing import Dict
+from typing import Iterable
+from typing import Iterator
+from typing import List
+from typing import Mapping
+from typing import NoReturn
+from typing import Optional
+from typing import Tuple
+from typing import Type
+from typing import TYPE_CHECKING
+from typing import TypeVar
+from typing import Union
+
+from _pytest._code.code import ExceptionChainRepr
+from _pytest._code.code import ExceptionInfo
+from _pytest._code.code import ExceptionRepr
+from _pytest._code.code import ReprEntry
+from _pytest._code.code import ReprEntryNative
+from _pytest._code.code import ReprExceptionInfo
+from _pytest._code.code import ReprFileLocation
+from _pytest._code.code import ReprFuncArgs
+from _pytest._code.code import ReprLocals
+from _pytest._code.code import ReprTraceback
+from _pytest._code.code import TerminalRepr
+from _pytest._io import TerminalWriter
+from _pytest.compat import final
+from _pytest.config import Config
+from _pytest.nodes import Collector
+from _pytest.nodes import Item
+from _pytest.outcomes import skip
+
+if TYPE_CHECKING:
+    from typing_extensions import Literal
+
+    from _pytest.runner import CallInfo
+
+
+def getworkerinfoline(node):
+    try:
+        return node._workerinfocache
+    except AttributeError:
+        d = node.workerinfo
+        ver = "%s.%s.%s" % d["version_info"][:3]
+        node._workerinfocache = s = "[{}] {} -- Python {} {}".format(
+            d["id"], d["sysplatform"], ver, d["executable"]
+        )
+        return s
+
+
+_R = TypeVar("_R", bound="BaseReport")
+
+
+class BaseReport:
+    when: Optional[str]
+    location: Optional[Tuple[str, Optional[int], str]]
+    longrepr: Union[
+        None, ExceptionInfo[BaseException], Tuple[str, int, str], str, TerminalRepr
+    ]
+    sections: List[Tuple[str, str]]
+    nodeid: str
+    outcome: "Literal['passed', 'failed', 'skipped']"
+
+    def __init__(self, **kw: Any) -> None:
+        self.__dict__.update(kw)
+
+    if TYPE_CHECKING:
+        # Can have arbitrary fields given to __init__().
+        def __getattr__(self, key: str) -> Any:
+            ...
+
+    def toterminal(self, out: TerminalWriter) -> None:
+        if hasattr(self, "node"):
+            worker_info = getworkerinfoline(self.node)
+            if worker_info:
+                out.line(worker_info)
+
+        longrepr = self.longrepr
+        if longrepr is None:
+            return
+
+        if hasattr(longrepr, "toterminal"):
+            longrepr_terminal = cast(TerminalRepr, longrepr)
+            longrepr_terminal.toterminal(out)
+        else:
+            try:
+                s = str(longrepr)
+            except UnicodeEncodeError:
+                s = "<unprintable longrepr>"
+            out.line(s)
+
+    def get_sections(self, prefix: str) -> Iterator[Tuple[str, str]]:
+        for name, content in self.sections:
+            if name.startswith(prefix):
+                yield prefix, content
+
+    @property
+    def longreprtext(self) -> str:
+        """Read-only property that returns the full string representation of
+        ``longrepr``.
+
+        .. versionadded:: 3.0
+        """
+        file = StringIO()
+        tw = TerminalWriter(file)
+        tw.hasmarkup = False
+        self.toterminal(tw)
+        exc = file.getvalue()
+        return exc.strip()
+
+    @property
+    def caplog(self) -> str:
+        """Return captured log lines, if log capturing is enabled.
+
+        .. versionadded:: 3.5
+        """
+        return "\n".join(
+            content for (prefix, content) in self.get_sections("Captured log")
+        )
+
+    @property
+    def capstdout(self) -> str:
+        """Return captured text from stdout, if capturing is enabled.
+
+        .. versionadded:: 3.0
+        """
+        return "".join(
+            content for (prefix, content) in self.get_sections("Captured stdout")
+        )
+
+    @property
+    def capstderr(self) -> str:
+        """Return captured text from stderr, if capturing is enabled.
+
+        .. versionadded:: 3.0
+        """
+        return "".join(
+            content for (prefix, content) in self.get_sections("Captured stderr")
+        )
+
+    @property
+    def passed(self) -> bool:
+        """Whether the outcome is passed."""
+        return self.outcome == "passed"
+
+    @property
+    def failed(self) -> bool:
+        """Whether the outcome is failed."""
+        return self.outcome == "failed"
+
+    @property
+    def skipped(self) -> bool:
+        """Whether the outcome is skipped."""
+        return self.outcome == "skipped"
+
+    @property
+    def fspath(self) -> str:
+        """The path portion of the reported node, as a string."""
+        return self.nodeid.split("::")[0]
+
+    @property
+    def count_towards_summary(self) -> bool:
+        """**Experimental** Whether this report should be counted towards the
+        totals shown at the end of the test session: "1 passed, 1 failure, etc".
+
+        .. note::
+
+            This function is considered **experimental**, so beware that it is subject to changes
+            even in patch releases.
+        """
+        return True
+
+    @property
+    def head_line(self) -> Optional[str]:
+        """**Experimental** The head line shown with longrepr output for this
+        report, more commonly during traceback representation during
+        failures::
+
+            ________ Test.foo ________
+
+
+        In the example above, the head_line is "Test.foo".
+
+        .. note::
+
+            This function is considered **experimental**, so beware that it is subject to changes
+            even in patch releases.
+        """
+        if self.location is not None:
+            fspath, lineno, domain = self.location
+            return domain
+        return None
+
+    def _get_verbose_word(self, config: Config):
+        _category, _short, verbose = config.hook.pytest_report_teststatus(
+            report=self, config=config
+        )
+        return verbose
+
+    def _to_json(self) -> Dict[str, Any]:
+        """Return the contents of this report as a dict of builtin entries,
+        suitable for serialization.
+
+        This was originally the serialize_report() function from xdist (ca03269).
+
+        Experimental method.
+        """
+        return _report_to_json(self)
+
+    @classmethod
+    def _from_json(cls: Type[_R], reportdict: Dict[str, object]) -> _R:
+        """Create either a TestReport or CollectReport, depending on the calling class.
+
+        It is the callers responsibility to know which class to pass here.
+
+        This was originally the serialize_report() function from xdist (ca03269).
+
+        Experimental method.
+        """
+        kwargs = _report_kwargs_from_json(reportdict)
+        return cls(**kwargs)
+
+
+def _report_unserialization_failure(
+    type_name: str, report_class: Type[BaseReport], reportdict
+) -> NoReturn:
+    url = "https://github.com/pytest-dev/pytest/issues"
+    stream = StringIO()
+    pprint("-" * 100, stream=stream)
+    pprint("INTERNALERROR: Unknown entry type returned: %s" % type_name, stream=stream)
+    pprint("report_name: %s" % report_class, stream=stream)
+    pprint(reportdict, stream=stream)
+    pprint("Please report this bug at %s" % url, stream=stream)
+    pprint("-" * 100, stream=stream)
+    raise RuntimeError(stream.getvalue())
+
+
+@final
+class TestReport(BaseReport):
+    """Basic test report object (also used for setup and teardown calls if
+    they fail).
+
+    Reports can contain arbitrary extra attributes.
+    """
+
+    __test__ = False
+
+    def __init__(
+        self,
+        nodeid: str,
+        location: Tuple[str, Optional[int], str],
+        keywords: Mapping[str, Any],
+        outcome: "Literal['passed', 'failed', 'skipped']",
+        longrepr: Union[
+            None, ExceptionInfo[BaseException], Tuple[str, int, str], str, TerminalRepr
+        ],
+        when: "Literal['setup', 'call', 'teardown']",
+        sections: Iterable[Tuple[str, str]] = (),
+        duration: float = 0,
+        start: float = 0,
+        stop: float = 0,
+        user_properties: Optional[Iterable[Tuple[str, object]]] = None,
+        **extra,
+    ) -> None:
+        #: Normalized collection nodeid.
+        self.nodeid = nodeid
+
+        #: A (filesystempath, lineno, domaininfo) tuple indicating the
+        #: actual location of a test item - it might be different from the
+        #: collected one e.g. if a method is inherited from a different module.
+        #: The filesystempath may be relative to ``config.rootdir``.
+        #: The line number is 0-based.
+        self.location: Tuple[str, Optional[int], str] = location
+
+        #: A name -> value dictionary containing all keywords and
+        #: markers associated with a test invocation.
+        self.keywords: Mapping[str, Any] = keywords
+
+        #: Test outcome, always one of "passed", "failed", "skipped".
+        self.outcome = outcome
+
+        #: None or a failure representation.
+        self.longrepr = longrepr
+
+        #: One of 'setup', 'call', 'teardown' to indicate runtest phase.
+        self.when = when
+
+        #: User properties is a list of tuples (name, value) that holds user
+        #: defined properties of the test.
+        self.user_properties = list(user_properties or [])
+
+        #: Tuples of str ``(heading, content)`` with extra information
+        #: for the test report. Used by pytest to add text captured
+        #: from ``stdout``, ``stderr``, and intercepted logging events. May
+        #: be used by other plugins to add arbitrary information to reports.
+        self.sections = list(sections)
+
+        #: Time it took to run just the test.
+        self.duration: float = duration
+
+        #: The system time when the call started, in seconds since the epoch.
+        self.start: float = start
+        #: The system time when the call ended, in seconds since the epoch.
+        self.stop: float = stop
+
+        self.__dict__.update(extra)
+
+    def __repr__(self) -> str:
+        return "<{} {!r} when={!r} outcome={!r}>".format(
+            self.__class__.__name__, self.nodeid, self.when, self.outcome
+        )
+
+    @classmethod
+    def from_item_and_call(cls, item: Item, call: "CallInfo[None]") -> "TestReport":
+        """Create and fill a TestReport with standard item and call info.
+
+        :param item: The item.
+        :param call: The call info.
+        """
+        when = call.when
+        # Remove "collect" from the Literal type -- only for collection calls.
+        assert when != "collect"
+        duration = call.duration
+        start = call.start
+        stop = call.stop
+        keywords = {x: 1 for x in item.keywords}
+        excinfo = call.excinfo
+        sections = []
+        if not call.excinfo:
+            outcome: Literal["passed", "failed", "skipped"] = "passed"
+            longrepr: Union[
+                None,
+                ExceptionInfo[BaseException],
+                Tuple[str, int, str],
+                str,
+                TerminalRepr,
+            ] = None
+        else:
+            if not isinstance(excinfo, ExceptionInfo):
+                outcome = "failed"
+                longrepr = excinfo
+            elif isinstance(excinfo.value, skip.Exception):
+                outcome = "skipped"
+                r = excinfo._getreprcrash()
+                assert (
+                    r is not None
+                ), "There should always be a traceback entry for skipping a test."
+                if excinfo.value._use_item_location:
+                    path, line = item.reportinfo()[:2]
+                    assert line is not None
+                    longrepr = os.fspath(path), line + 1, r.message
+                else:
+                    longrepr = (str(r.path), r.lineno, r.message)
+            else:
+                outcome = "failed"
+                if call.when == "call":
+                    longrepr = item.repr_failure(excinfo)
+                else:  # exception in setup or teardown
+                    longrepr = item._repr_failure_py(
+                        excinfo, style=item.config.getoption("tbstyle", "auto")
+                    )
+        for rwhen, key, content in item._report_sections:
+            sections.append((f"Captured {key} {rwhen}", content))
+        return cls(
+            item.nodeid,
+            item.location,
+            keywords,
+            outcome,
+            longrepr,
+            when,
+            sections,
+            duration,
+            start,
+            stop,
+            user_properties=item.user_properties,
+        )
+
+
+@final
+class CollectReport(BaseReport):
+    """Collection report object.
+
+    Reports can contain arbitrary extra attributes.
+    """
+
+    when = "collect"
+
+    def __init__(
+        self,
+        nodeid: str,
+        outcome: "Literal['passed', 'failed', 'skipped']",
+        longrepr: Union[
+            None, ExceptionInfo[BaseException], Tuple[str, int, str], str, TerminalRepr
+        ],
+        result: Optional[List[Union[Item, Collector]]],
+        sections: Iterable[Tuple[str, str]] = (),
+        **extra,
+    ) -> None:
+        #: Normalized collection nodeid.
+        self.nodeid = nodeid
+
+        #: Test outcome, always one of "passed", "failed", "skipped".
+        self.outcome = outcome
+
+        #: None or a failure representation.
+        self.longrepr = longrepr
+
+        #: The collected items and collection nodes.
+        self.result = result or []
+
+        #: Tuples of str ``(heading, content)`` with extra information
+        #: for the test report. Used by pytest to add text captured
+        #: from ``stdout``, ``stderr``, and intercepted logging events. May
+        #: be used by other plugins to add arbitrary information to reports.
+        self.sections = list(sections)
+
+        self.__dict__.update(extra)
+
+    @property
+    def location(  # type:ignore[override]
+        self,
+    ) -> Optional[Tuple[str, Optional[int], str]]:
+        return (self.fspath, None, self.fspath)
+
+    def __repr__(self) -> str:
+        return "<CollectReport {!r} lenresult={} outcome={!r}>".format(
+            self.nodeid, len(self.result), self.outcome
+        )
+
+
+class CollectErrorRepr(TerminalRepr):
+    def __init__(self, msg: str) -> None:
+        self.longrepr = msg
+
+    def toterminal(self, out: TerminalWriter) -> None:
+        out.line(self.longrepr, red=True)
+
+
+def pytest_report_to_serializable(
+    report: Union[CollectReport, TestReport]
+) -> Optional[Dict[str, Any]]:
+    if isinstance(report, (TestReport, CollectReport)):
+        data = report._to_json()
+        data["$report_type"] = report.__class__.__name__
+        return data
+    # TODO: Check if this is actually reachable.
+    return None  # type: ignore[unreachable]
+
+
+def pytest_report_from_serializable(
+    data: Dict[str, Any],
+) -> Optional[Union[CollectReport, TestReport]]:
+    if "$report_type" in data:
+        if data["$report_type"] == "TestReport":
+            return TestReport._from_json(data)
+        elif data["$report_type"] == "CollectReport":
+            return CollectReport._from_json(data)
+        assert False, "Unknown report_type unserialize data: {}".format(
+            data["$report_type"]
+        )
+    return None
+
+
+def _report_to_json(report: BaseReport) -> Dict[str, Any]:
+    """Return the contents of this report as a dict of builtin entries,
+    suitable for serialization.
+
+    This was originally the serialize_report() function from xdist (ca03269).
+    """
+
+    def serialize_repr_entry(
+        entry: Union[ReprEntry, ReprEntryNative]
+    ) -> Dict[str, Any]:
+        data = dataclasses.asdict(entry)
+        for key, value in data.items():
+            if hasattr(value, "__dict__"):
+                data[key] = dataclasses.asdict(value)
+        entry_data = {"type": type(entry).__name__, "data": data}
+        return entry_data
+
+    def serialize_repr_traceback(reprtraceback: ReprTraceback) -> Dict[str, Any]:
+        result = dataclasses.asdict(reprtraceback)
+        result["reprentries"] = [
+            serialize_repr_entry(x) for x in reprtraceback.reprentries
+        ]
+        return result
+
+    def serialize_repr_crash(
+        reprcrash: Optional[ReprFileLocation],
+    ) -> Optional[Dict[str, Any]]:
+        if reprcrash is not None:
+            return dataclasses.asdict(reprcrash)
+        else:
+            return None
+
+    def serialize_exception_longrepr(rep: BaseReport) -> Dict[str, Any]:
+        assert rep.longrepr is not None
+        # TODO: Investigate whether the duck typing is really necessary here.
+        longrepr = cast(ExceptionRepr, rep.longrepr)
+        result: Dict[str, Any] = {
+            "reprcrash": serialize_repr_crash(longrepr.reprcrash),
+            "reprtraceback": serialize_repr_traceback(longrepr.reprtraceback),
+            "sections": longrepr.sections,
+        }
+        if isinstance(longrepr, ExceptionChainRepr):
+            result["chain"] = []
+            for repr_traceback, repr_crash, description in longrepr.chain:
+                result["chain"].append(
+                    (
+                        serialize_repr_traceback(repr_traceback),
+                        serialize_repr_crash(repr_crash),
+                        description,
+                    )
+                )
+        else:
+            result["chain"] = None
+        return result
+
+    d = report.__dict__.copy()
+    if hasattr(report.longrepr, "toterminal"):
+        if hasattr(report.longrepr, "reprtraceback") and hasattr(
+            report.longrepr, "reprcrash"
+        ):
+            d["longrepr"] = serialize_exception_longrepr(report)
+        else:
+            d["longrepr"] = str(report.longrepr)
+    else:
+        d["longrepr"] = report.longrepr
+    for name in d:
+        if isinstance(d[name], os.PathLike):
+            d[name] = os.fspath(d[name])
+        elif name == "result":
+            d[name] = None  # for now
+    return d
+
+
+def _report_kwargs_from_json(reportdict: Dict[str, Any]) -> Dict[str, Any]:
+    """Return **kwargs that can be used to construct a TestReport or
+    CollectReport instance.
+
+    This was originally the serialize_report() function from xdist (ca03269).
+    """
+
+    def deserialize_repr_entry(entry_data):
+        data = entry_data["data"]
+        entry_type = entry_data["type"]
+        if entry_type == "ReprEntry":
+            reprfuncargs = None
+            reprfileloc = None
+            reprlocals = None
+            if data["reprfuncargs"]:
+                reprfuncargs = ReprFuncArgs(**data["reprfuncargs"])
+            if data["reprfileloc"]:
+                reprfileloc = ReprFileLocation(**data["reprfileloc"])
+            if data["reprlocals"]:
+                reprlocals = ReprLocals(data["reprlocals"]["lines"])
+
+            reprentry: Union[ReprEntry, ReprEntryNative] = ReprEntry(
+                lines=data["lines"],
+                reprfuncargs=reprfuncargs,
+                reprlocals=reprlocals,
+                reprfileloc=reprfileloc,
+                style=data["style"],
+            )
+        elif entry_type == "ReprEntryNative":
+            reprentry = ReprEntryNative(data["lines"])
+        else:
+            _report_unserialization_failure(entry_type, TestReport, reportdict)
+        return reprentry
+
+    def deserialize_repr_traceback(repr_traceback_dict):
+        repr_traceback_dict["reprentries"] = [
+            deserialize_repr_entry(x) for x in repr_traceback_dict["reprentries"]
+        ]
+        return ReprTraceback(**repr_traceback_dict)
+
+    def deserialize_repr_crash(repr_crash_dict: Optional[Dict[str, Any]]):
+        if repr_crash_dict is not None:
+            return ReprFileLocation(**repr_crash_dict)
+        else:
+            return None
+
+    if (
+        reportdict["longrepr"]
+        and "reprcrash" in reportdict["longrepr"]
+        and "reprtraceback" in reportdict["longrepr"]
+    ):
+        reprtraceback = deserialize_repr_traceback(
+            reportdict["longrepr"]["reprtraceback"]
+        )
+        reprcrash = deserialize_repr_crash(reportdict["longrepr"]["reprcrash"])
+        if reportdict["longrepr"]["chain"]:
+            chain = []
+            for repr_traceback_data, repr_crash_data, description in reportdict[
+                "longrepr"
+            ]["chain"]:
+                chain.append(
+                    (
+                        deserialize_repr_traceback(repr_traceback_data),
+                        deserialize_repr_crash(repr_crash_data),
+                        description,
+                    )
+                )
+            exception_info: Union[
+                ExceptionChainRepr, ReprExceptionInfo
+            ] = ExceptionChainRepr(chain)
+        else:
+            exception_info = ReprExceptionInfo(
+                reprtraceback=reprtraceback,
+                reprcrash=reprcrash,
+            )
+
+        for section in reportdict["longrepr"]["sections"]:
+            exception_info.addsection(*section)
+        reportdict["longrepr"] = exception_info
+
+    return reportdict
diff --git a/contrib/python/pytest/py3/_pytest/runner.py b/contrib/python/pytest/py3/_pytest/runner.py
new file mode 100644
index 0000000000..f861c05a45
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/runner.py
@@ -0,0 +1,551 @@
+"""Basic collect and runtest protocol implementations."""
+import bdb
+import dataclasses
+import os
+import sys
+from typing import Callable
+from typing import cast
+from typing import Dict
+from typing import Generic
+from typing import List
+from typing import Optional
+from typing import Tuple
+from typing import Type
+from typing import TYPE_CHECKING
+from typing import TypeVar
+from typing import Union
+
+from .reports import BaseReport
+from .reports import CollectErrorRepr
+from .reports import CollectReport
+from .reports import TestReport
+from _pytest import timing
+from _pytest._code.code import ExceptionChainRepr
+from _pytest._code.code import ExceptionInfo
+from _pytest._code.code import TerminalRepr
+from _pytest.compat import final
+from _pytest.config.argparsing import Parser
+from _pytest.deprecated import check_ispytest
+from _pytest.nodes import Collector
+from _pytest.nodes import Item
+from _pytest.nodes import Node
+from _pytest.outcomes import Exit
+from _pytest.outcomes import OutcomeException
+from _pytest.outcomes import Skipped
+from _pytest.outcomes import TEST_OUTCOME
+
+if sys.version_info[:2] < (3, 11):
+    from exceptiongroup import BaseExceptionGroup
+
+if TYPE_CHECKING:
+    from typing_extensions import Literal
+
+    from _pytest.main import Session
+    from _pytest.terminal import TerminalReporter
+
+#
+# pytest plugin hooks.
+
+
+def pytest_addoption(parser: Parser) -> None:
+    group = parser.getgroup("terminal reporting", "Reporting", after="general")
+    group.addoption(
+        "--durations",
+        action="store",
+        type=int,
+        default=None,
+        metavar="N",
+        help="Show N slowest setup/test durations (N=0 for all)",
+    )
+    group.addoption(
+        "--durations-min",
+        action="store",
+        type=float,
+        default=0.005,
+        metavar="N",
+        help="Minimal duration in seconds for inclusion in slowest list. "
+        "Default: 0.005.",
+    )
+
+
+def pytest_terminal_summary(terminalreporter: "TerminalReporter") -> None:
+    durations = terminalreporter.config.option.durations
+    durations_min = terminalreporter.config.option.durations_min
+    verbose = terminalreporter.config.getvalue("verbose")
+    if durations is None:
+        return
+    tr = terminalreporter
+    dlist = []
+    for replist in tr.stats.values():
+        for rep in replist:
+            if hasattr(rep, "duration"):
+                dlist.append(rep)
+    if not dlist:
+        return
+    dlist.sort(key=lambda x: x.duration, reverse=True)  # type: ignore[no-any-return]
+    if not durations:
+        tr.write_sep("=", "slowest durations")
+    else:
+        tr.write_sep("=", "slowest %s durations" % durations)
+        dlist = dlist[:durations]
+
+    for i, rep in enumerate(dlist):
+        if verbose < 2 and rep.duration < durations_min:
+            tr.write_line("")
+            tr.write_line(
+                "(%s durations < %gs hidden.  Use -vv to show these durations.)"
+                % (len(dlist) - i, durations_min)
+            )
+            break
+        tr.write_line(f"{rep.duration:02.2f}s {rep.when:<8} {rep.nodeid}")
+
+
+def pytest_sessionstart(session: "Session") -> None:
+    session._setupstate = SetupState()
+
+
+def pytest_sessionfinish(session: "Session") -> None:
+    session._setupstate.teardown_exact(None)
+
+
+def pytest_runtest_protocol(item: Item, nextitem: Optional[Item]) -> bool:
+    ihook = item.ihook
+    ihook.pytest_runtest_logstart(nodeid=item.nodeid, location=item.location)
+    runtestprotocol(item, nextitem=nextitem)
+    ihook.pytest_runtest_logfinish(nodeid=item.nodeid, location=item.location)
+    return True
+
+
+def runtestprotocol(
+    item: Item, log: bool = True, nextitem: Optional[Item] = None
+) -> List[TestReport]:
+    hasrequest = hasattr(item, "_request")
+    if hasrequest and not item._request:  # type: ignore[attr-defined]
+        # This only happens if the item is re-run, as is done by
+        # pytest-rerunfailures.
+        item._initrequest()  # type: ignore[attr-defined]
+    rep = call_and_report(item, "setup", log)
+    reports = [rep]
+    if rep.passed:
+        if item.config.getoption("setupshow", False):
+            show_test_item(item)
+        if not item.config.getoption("setuponly", False):
+            reports.append(call_and_report(item, "call", log))
+    reports.append(call_and_report(item, "teardown", log, nextitem=nextitem))
+    # After all teardown hooks have been called
+    # want funcargs and request info to go away.
+    if hasrequest:
+        item._request = False  # type: ignore[attr-defined]
+        item.funcargs = None  # type: ignore[attr-defined]
+    return reports
+
+
+def show_test_item(item: Item) -> None:
+    """Show test function, parameters and the fixtures of the test item."""
+    tw = item.config.get_terminal_writer()
+    tw.line()
+    tw.write(" " * 8)
+    tw.write(item.nodeid)
+    used_fixtures = sorted(getattr(item, "fixturenames", []))
+    if used_fixtures:
+        tw.write(" (fixtures used: {})".format(", ".join(used_fixtures)))
+    tw.flush()
+
+
+def pytest_runtest_setup(item: Item) -> None:
+    _update_current_test_var(item, "setup")
+    item.session._setupstate.setup(item)
+
+
+def pytest_runtest_call(item: Item) -> None:
+    _update_current_test_var(item, "call")
+    try:
+        del sys.last_type
+        del sys.last_value
+        del sys.last_traceback
+    except AttributeError:
+        pass
+    try:
+        item.runtest()
+    except Exception as e:
+        # Store trace info to allow postmortem debugging
+        sys.last_type = type(e)
+        sys.last_value = e
+        assert e.__traceback__ is not None
+        # Skip *this* frame
+        sys.last_traceback = e.__traceback__.tb_next
+        raise e
+
+
+def pytest_runtest_teardown(item: Item, nextitem: Optional[Item]) -> None:
+    _update_current_test_var(item, "teardown")
+    item.session._setupstate.teardown_exact(nextitem)
+    _update_current_test_var(item, None)
+
+
+def _update_current_test_var(
+    item: Item, when: Optional["Literal['setup', 'call', 'teardown']"]
+) -> None:
+    """Update :envvar:`PYTEST_CURRENT_TEST` to reflect the current item and stage.
+
+    If ``when`` is None, delete ``PYTEST_CURRENT_TEST`` from the environment.
+    """
+    var_name = "PYTEST_CURRENT_TEST"
+    if when:
+        value = f"{item.nodeid} ({when})"
+        # don't allow null bytes on environment variables (see #2644, #2957)
+        value = value.replace("\x00", "(null)")
+        os.environ[var_name] = value
+    else:
+        os.environ.pop(var_name)
+
+
+def pytest_report_teststatus(report: BaseReport) -> Optional[Tuple[str, str, str]]:
+    if report.when in ("setup", "teardown"):
+        if report.failed:
+            #      category, shortletter, verbose-word
+            return "error", "E", "ERROR"
+        elif report.skipped:
+            return "skipped", "s", "SKIPPED"
+        else:
+            return "", "", ""
+    return None
+
+
+#
+# Implementation
+
+
+def call_and_report(
+    item: Item, when: "Literal['setup', 'call', 'teardown']", log: bool = True, **kwds
+) -> TestReport:
+    call = call_runtest_hook(item, when, **kwds)
+    hook = item.ihook
+    report: TestReport = hook.pytest_runtest_makereport(item=item, call=call)
+    if log:
+        hook.pytest_runtest_logreport(report=report)
+    if check_interactive_exception(call, report):
+        hook.pytest_exception_interact(node=item, call=call, report=report)
+    return report
+
+
+def check_interactive_exception(call: "CallInfo[object]", report: BaseReport) -> bool:
+    """Check whether the call raised an exception that should be reported as
+    interactive."""
+    if call.excinfo is None:
+        # Didn't raise.
+        return False
+    if hasattr(report, "wasxfail"):
+        # Exception was expected.
+        return False
+    if isinstance(call.excinfo.value, (Skipped, bdb.BdbQuit)):
+        # Special control flow exception.
+        return False
+    return True
+
+
+def call_runtest_hook(
+    item: Item, when: "Literal['setup', 'call', 'teardown']", **kwds
+) -> "CallInfo[None]":
+    if when == "setup":
+        ihook: Callable[..., None] = item.ihook.pytest_runtest_setup
+    elif when == "call":
+        ihook = item.ihook.pytest_runtest_call
+    elif when == "teardown":
+        ihook = item.ihook.pytest_runtest_teardown
+    else:
+        assert False, f"Unhandled runtest hook case: {when}"
+    reraise: Tuple[Type[BaseException], ...] = (Exit,)
+    if not item.config.getoption("usepdb", False):
+        reraise += (KeyboardInterrupt,)
+    return CallInfo.from_call(
+        lambda: ihook(item=item, **kwds), when=when, reraise=reraise
+    )
+
+
+TResult = TypeVar("TResult", covariant=True)
+
+
+@final
+@dataclasses.dataclass
+class CallInfo(Generic[TResult]):
+    """Result/Exception info of a function invocation."""
+
+    _result: Optional[TResult]
+    #: The captured exception of the call, if it raised.
+    excinfo: Optional[ExceptionInfo[BaseException]]
+    #: The system time when the call started, in seconds since the epoch.
+    start: float
+    #: The system time when the call ended, in seconds since the epoch.
+    stop: float
+    #: The call duration, in seconds.
+    duration: float
+    #: The context of invocation: "collect", "setup", "call" or "teardown".
+    when: "Literal['collect', 'setup', 'call', 'teardown']"
+
+    def __init__(
+        self,
+        result: Optional[TResult],
+        excinfo: Optional[ExceptionInfo[BaseException]],
+        start: float,
+        stop: float,
+        duration: float,
+        when: "Literal['collect', 'setup', 'call', 'teardown']",
+        *,
+        _ispytest: bool = False,
+    ) -> None:
+        check_ispytest(_ispytest)
+        self._result = result
+        self.excinfo = excinfo
+        self.start = start
+        self.stop = stop
+        self.duration = duration
+        self.when = when
+
+    @property
+    def result(self) -> TResult:
+        """The return value of the call, if it didn't raise.
+
+        Can only be accessed if excinfo is None.
+        """
+        if self.excinfo is not None:
+            raise AttributeError(f"{self!r} has no valid result")
+        # The cast is safe because an exception wasn't raised, hence
+        # _result has the expected function return type (which may be
+        #  None, that's why a cast and not an assert).
+        return cast(TResult, self._result)
+
+    @classmethod
+    def from_call(
+        cls,
+        func: "Callable[[], TResult]",
+        when: "Literal['collect', 'setup', 'call', 'teardown']",
+        reraise: Optional[
+            Union[Type[BaseException], Tuple[Type[BaseException], ...]]
+        ] = None,
+    ) -> "CallInfo[TResult]":
+        """Call func, wrapping the result in a CallInfo.
+
+        :param func:
+            The function to call. Called without arguments.
+        :param when:
+            The phase in which the function is called.
+        :param reraise:
+            Exception or exceptions that shall propagate if raised by the
+            function, instead of being wrapped in the CallInfo.
+        """
+        excinfo = None
+        start = timing.time()
+        precise_start = timing.perf_counter()
+        try:
+            result: Optional[TResult] = func()
+        except BaseException:
+            excinfo = ExceptionInfo.from_current()
+            if reraise is not None and isinstance(excinfo.value, reraise):
+                raise
+            result = None
+        # use the perf counter
+        precise_stop = timing.perf_counter()
+        duration = precise_stop - precise_start
+        stop = timing.time()
+        return cls(
+            start=start,
+            stop=stop,
+            duration=duration,
+            when=when,
+            result=result,
+            excinfo=excinfo,
+            _ispytest=True,
+        )
+
+    def __repr__(self) -> str:
+        if self.excinfo is None:
+            return f"<CallInfo when={self.when!r} result: {self._result!r}>"
+        return f"<CallInfo when={self.when!r} excinfo={self.excinfo!r}>"
+
+
+def pytest_runtest_makereport(item: Item, call: CallInfo[None]) -> TestReport:
+    return TestReport.from_item_and_call(item, call)
+
+
+def pytest_make_collect_report(collector: Collector) -> CollectReport:
+    call = CallInfo.from_call(lambda: list(collector.collect()), "collect")
+    longrepr: Union[None, Tuple[str, int, str], str, TerminalRepr] = None
+    if not call.excinfo:
+        outcome: Literal["passed", "skipped", "failed"] = "passed"
+    else:
+        skip_exceptions = [Skipped]
+        unittest = sys.modules.get("unittest")
+        if unittest is not None:
+            # Type ignored because unittest is loaded dynamically.
+            skip_exceptions.append(unittest.SkipTest)  # type: ignore
+        if isinstance(call.excinfo.value, tuple(skip_exceptions)):
+            outcome = "skipped"
+            r_ = collector._repr_failure_py(call.excinfo, "line")
+            assert isinstance(r_, ExceptionChainRepr), repr(r_)
+            r = r_.reprcrash
+            assert r
+            longrepr = (str(r.path), r.lineno, r.message)
+        else:
+            outcome = "failed"
+            errorinfo = collector.repr_failure(call.excinfo)
+            if not hasattr(errorinfo, "toterminal"):
+                assert isinstance(errorinfo, str)
+                errorinfo = CollectErrorRepr(errorinfo)
+            longrepr = errorinfo
+    result = call.result if not call.excinfo else None
+    rep = CollectReport(collector.nodeid, outcome, longrepr, result)
+    rep.call = call  # type: ignore # see collect_one_node
+    return rep
+
+
+class SetupState:
+    """Shared state for setting up/tearing down test items or collectors
+    in a session.
+
+    Suppose we have a collection tree as follows:
+
+    <Session session>
+        <Module mod1>
+            <Function item1>
+        <Module mod2>
+            <Function item2>
+
+    The SetupState maintains a stack. The stack starts out empty:
+
+        []
+
+    During the setup phase of item1, setup(item1) is called. What it does
+    is:
+
+        push session to stack, run session.setup()
+        push mod1 to stack, run mod1.setup()
+        push item1 to stack, run item1.setup()
+
+    The stack is:
+
+        [session, mod1, item1]
+
+    While the stack is in this shape, it is allowed to add finalizers to
+    each of session, mod1, item1 using addfinalizer().
+
+    During the teardown phase of item1, teardown_exact(item2) is called,
+    where item2 is the next item to item1. What it does is:
+
+        pop item1 from stack, run its teardowns
+        pop mod1 from stack, run its teardowns
+
+    mod1 was popped because it ended its purpose with item1. The stack is:
+
+        [session]
+
+    During the setup phase of item2, setup(item2) is called. What it does
+    is:
+
+        push mod2 to stack, run mod2.setup()
+        push item2 to stack, run item2.setup()
+
+    Stack:
+
+        [session, mod2, item2]
+
+    During the teardown phase of item2, teardown_exact(None) is called,
+    because item2 is the last item. What it does is:
+
+        pop item2 from stack, run its teardowns
+        pop mod2 from stack, run its teardowns
+        pop session from stack, run its teardowns
+
+    Stack:
+
+        []
+
+    The end!
+    """
+
+    def __init__(self) -> None:
+        # The stack is in the dict insertion order.
+        self.stack: Dict[
+            Node,
+            Tuple[
+                # Node's finalizers.
+                List[Callable[[], object]],
+                # Node's exception, if its setup raised.
+                Optional[Union[OutcomeException, Exception]],
+            ],
+        ] = {}
+
+    def setup(self, item: Item) -> None:
+        """Setup objects along the collector chain to the item."""
+        needed_collectors = item.listchain()
+
+        # If a collector fails its setup, fail its entire subtree of items.
+        # The setup is not retried for each item - the same exception is used.
+        for col, (finalizers, exc) in self.stack.items():
+            assert col in needed_collectors, "previous item was not torn down properly"
+            if exc:
+                raise exc
+
+        for col in needed_collectors[len(self.stack) :]:
+            assert col not in self.stack
+            # Push onto the stack.
+            self.stack[col] = ([col.teardown], None)
+            try:
+                col.setup()
+            except TEST_OUTCOME as exc:
+                self.stack[col] = (self.stack[col][0], exc)
+                raise exc
+
+    def addfinalizer(self, finalizer: Callable[[], object], node: Node) -> None:
+        """Attach a finalizer to the given node.
+
+        The node must be currently active in the stack.
+        """
+        assert node and not isinstance(node, tuple)
+        assert callable(finalizer)
+        assert node in self.stack, (node, self.stack)
+        self.stack[node][0].append(finalizer)
+
+    def teardown_exact(self, nextitem: Optional[Item]) -> None:
+        """Teardown the current stack up until reaching nodes that nextitem
+        also descends from.
+
+        When nextitem is None (meaning we're at the last item), the entire
+        stack is torn down.
+        """
+        needed_collectors = nextitem and nextitem.listchain() or []
+        exceptions: List[BaseException] = []
+        while self.stack:
+            if list(self.stack.keys()) == needed_collectors[: len(self.stack)]:
+                break
+            node, (finalizers, _) = self.stack.popitem()
+            these_exceptions = []
+            while finalizers:
+                fin = finalizers.pop()
+                try:
+                    fin()
+                except TEST_OUTCOME as e:
+                    these_exceptions.append(e)
+
+            if len(these_exceptions) == 1:
+                exceptions.extend(these_exceptions)
+            elif these_exceptions:
+                msg = f"errors while tearing down {node!r}"
+                exceptions.append(BaseExceptionGroup(msg, these_exceptions[::-1]))
+
+        if len(exceptions) == 1:
+            raise exceptions[0]
+        elif exceptions:
+            raise BaseExceptionGroup("errors during test teardown", exceptions[::-1])
+        if nextitem is None:
+            assert not self.stack
+
+
+def collect_one_node(collector: Collector) -> CollectReport:
+    ihook = collector.ihook
+    ihook.pytest_collectstart(collector=collector)
+    rep: CollectReport = ihook.pytest_make_collect_report(collector=collector)
+    call = rep.__dict__.pop("call", None)
+    if call and check_interactive_exception(call, rep):
+        ihook.pytest_exception_interact(node=collector, call=call, report=rep)
+    return rep
diff --git a/contrib/python/pytest/py3/_pytest/scope.py b/contrib/python/pytest/py3/_pytest/scope.py
new file mode 100644
index 0000000000..7a746fb9fa
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/scope.py
@@ -0,0 +1,91 @@
+"""
+Scope definition and related utilities.
+
+Those are defined here, instead of in the 'fixtures' module because
+their use is spread across many other pytest modules, and centralizing it in 'fixtures'
+would cause circular references.
+
+Also this makes the module light to import, as it should.
+"""
+from enum import Enum
+from functools import total_ordering
+from typing import Optional
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from typing_extensions import Literal
+
+    _ScopeName = Literal["session", "package", "module", "class", "function"]
+
+
+@total_ordering
+class Scope(Enum):
+    """
+    Represents one of the possible fixture scopes in pytest.
+
+    Scopes are ordered from lower to higher, that is:
+
+              ->>> higher ->>>
+
+    Function < Class < Module < Package < Session
+
+              <<<- lower  <<<-
+    """
+
+    # Scopes need to be listed from lower to higher.
+    Function: "_ScopeName" = "function"
+    Class: "_ScopeName" = "class"
+    Module: "_ScopeName" = "module"
+    Package: "_ScopeName" = "package"
+    Session: "_ScopeName" = "session"
+
+    def next_lower(self) -> "Scope":
+        """Return the next lower scope."""
+        index = _SCOPE_INDICES[self]
+        if index == 0:
+            raise ValueError(f"{self} is the lower-most scope")
+        return _ALL_SCOPES[index - 1]
+
+    def next_higher(self) -> "Scope":
+        """Return the next higher scope."""
+        index = _SCOPE_INDICES[self]
+        if index == len(_SCOPE_INDICES) - 1:
+            raise ValueError(f"{self} is the upper-most scope")
+        return _ALL_SCOPES[index + 1]
+
+    def __lt__(self, other: "Scope") -> bool:
+        self_index = _SCOPE_INDICES[self]
+        other_index = _SCOPE_INDICES[other]
+        return self_index < other_index
+
+    @classmethod
+    def from_user(
+        cls, scope_name: "_ScopeName", descr: str, where: Optional[str] = None
+    ) -> "Scope":
+        """
+        Given a scope name from the user, return the equivalent Scope enum. Should be used
+        whenever we want to convert a user provided scope name to its enum object.
+
+        If the scope name is invalid, construct a user friendly message and call pytest.fail.
+        """
+        from _pytest.outcomes import fail
+
+        try:
+            # Holding this reference is necessary for mypy at the moment.
+            scope = Scope(scope_name)
+        except ValueError:
+            fail(
+                "{} {}got an unexpected scope value '{}'".format(
+                    descr, f"from {where} " if where else "", scope_name
+                ),
+                pytrace=False,
+            )
+        return scope
+
+
+_ALL_SCOPES = list(Scope)
+_SCOPE_INDICES = {scope: index for index, scope in enumerate(_ALL_SCOPES)}
+
+
+# Ordered list of scopes which can contain many tests (in practice all except Function).
+HIGH_SCOPES = [x for x in Scope if x is not Scope.Function]
diff --git a/contrib/python/pytest/py3/_pytest/setuponly.py b/contrib/python/pytest/py3/_pytest/setuponly.py
new file mode 100644
index 0000000000..583590d6b7
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/setuponly.py
@@ -0,0 +1,97 @@
+from typing import Generator
+from typing import Optional
+from typing import Union
+
+import pytest
+from _pytest._io.saferepr import saferepr
+from _pytest.config import Config
+from _pytest.config import ExitCode
+from _pytest.config.argparsing import Parser
+from _pytest.fixtures import FixtureDef
+from _pytest.fixtures import SubRequest
+from _pytest.scope import Scope
+
+
+def pytest_addoption(parser: Parser) -> None:
+    group = parser.getgroup("debugconfig")
+    group.addoption(
+        "--setuponly",
+        "--setup-only",
+        action="store_true",
+        help="Only setup fixtures, do not execute tests",
+    )
+    group.addoption(
+        "--setupshow",
+        "--setup-show",
+        action="store_true",
+        help="Show setup of fixtures while executing tests",
+    )
+
+
+@pytest.hookimpl(hookwrapper=True)
+def pytest_fixture_setup(
+    fixturedef: FixtureDef[object], request: SubRequest
+) -> Generator[None, None, None]:
+    yield
+    if request.config.option.setupshow:
+        if hasattr(request, "param"):
+            # Save the fixture parameter so ._show_fixture_action() can
+            # display it now and during the teardown (in .finish()).
+            if fixturedef.ids:
+                if callable(fixturedef.ids):
+                    param = fixturedef.ids(request.param)
+                else:
+                    param = fixturedef.ids[request.param_index]
+            else:
+                param = request.param
+            fixturedef.cached_param = param  # type: ignore[attr-defined]
+        _show_fixture_action(fixturedef, "SETUP")
+
+
+def pytest_fixture_post_finalizer(fixturedef: FixtureDef[object]) -> None:
+    if fixturedef.cached_result is not None:
+        config = fixturedef._fixturemanager.config
+        if config.option.setupshow:
+            _show_fixture_action(fixturedef, "TEARDOWN")
+            if hasattr(fixturedef, "cached_param"):
+                del fixturedef.cached_param  # type: ignore[attr-defined]
+
+
+def _show_fixture_action(fixturedef: FixtureDef[object], msg: str) -> None:
+    config = fixturedef._fixturemanager.config
+    capman = config.pluginmanager.getplugin("capturemanager")
+    if capman:
+        capman.suspend_global_capture()
+
+    tw = config.get_terminal_writer()
+    tw.line()
+    # Use smaller indentation the higher the scope: Session = 0, Package = 1, etc.
+    scope_indent = list(reversed(Scope)).index(fixturedef._scope)
+    tw.write(" " * 2 * scope_indent)
+    tw.write(
+        "{step} {scope} {fixture}".format(
+            step=msg.ljust(8),  # align the output to TEARDOWN
+            scope=fixturedef.scope[0].upper(),
+            fixture=fixturedef.argname,
+        )
+    )
+
+    if msg == "SETUP":
+        deps = sorted(arg for arg in fixturedef.argnames if arg != "request")
+        if deps:
+            tw.write(" (fixtures used: {})".format(", ".join(deps)))
+
+    if hasattr(fixturedef, "cached_param"):
+        tw.write(f"[{saferepr(fixturedef.cached_param, maxsize=42)}]")  # type: ignore[attr-defined]
+
+    tw.flush()
+
+    if capman:
+        capman.resume_global_capture()
+
+
+@pytest.hookimpl(tryfirst=True)
+def pytest_cmdline_main(config: Config) -> Optional[Union[int, ExitCode]]:
+    if config.option.setuponly:
+        config.option.setupshow = True
+    return None
diff --git a/contrib/python/pytest/py3/_pytest/setupplan.py b/contrib/python/pytest/py3/_pytest/setupplan.py
new file mode 100644
index 0000000000..1a4ebdd99c
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/setupplan.py
@@ -0,0 +1,40 @@
+from typing import Optional
+from typing import Union
+
+import pytest
+from _pytest.config import Config
+from _pytest.config import ExitCode
+from _pytest.config.argparsing import Parser
+from _pytest.fixtures import FixtureDef
+from _pytest.fixtures import SubRequest
+
+
+def pytest_addoption(parser: Parser) -> None:
+    group = parser.getgroup("debugconfig")
+    group.addoption(
+        "--setupplan",
+        "--setup-plan",
+        action="store_true",
+        help="Show what fixtures and tests would be executed but "
+        "don't execute anything",
+    )
+
+
+@pytest.hookimpl(tryfirst=True)
+def pytest_fixture_setup(
+    fixturedef: FixtureDef[object], request: SubRequest
+) -> Optional[object]:
+    # Will return a dummy fixture if the setuponly option is provided.
+    if request.config.option.setupplan:
+        my_cache_key = fixturedef.cache_key(request)
+        fixturedef.cached_result = (None, my_cache_key, None)
+        return fixturedef.cached_result
+    return None
+
+
+@pytest.hookimpl(tryfirst=True)
+def pytest_cmdline_main(config: Config) -> Optional[Union[int, ExitCode]]:
+    if config.option.setupplan:
+        config.option.setuponly = True
+        config.option.setupshow = True
+    return None
diff --git a/contrib/python/pytest/py3/_pytest/skipping.py b/contrib/python/pytest/py3/_pytest/skipping.py
new file mode 100644
index 0000000000..26ce73758a
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/skipping.py
@@ -0,0 +1,297 @@
+"""Support for skip/xfail functions and markers."""
+import dataclasses
+import os
+import platform
+import sys
+import traceback
+from collections.abc import Mapping
+from typing import Generator
+from typing import Optional
+from typing import Tuple
+from typing import Type
+
+from _pytest.config import Config
+from _pytest.config import hookimpl
+from _pytest.config.argparsing import Parser
+from _pytest.mark.structures import Mark
+from _pytest.nodes import Item
+from _pytest.outcomes import fail
+from _pytest.outcomes import skip
+from _pytest.outcomes import xfail
+from _pytest.reports import BaseReport
+from _pytest.runner import CallInfo
+from _pytest.stash import StashKey
+
+
+def pytest_addoption(parser: Parser) -> None:
+    group = parser.getgroup("general")
+    group.addoption(
+        "--runxfail",
+        action="store_true",
+        dest="runxfail",
+        default=False,
+        help="Report the results of xfail tests as if they were not marked",
+    )
+
+    parser.addini(
+        "xfail_strict",
+        "Default for the strict parameter of xfail "
+        "markers when not given explicitly (default: False)",
+        default=False,
+        type="bool",
+    )
+
+
+def pytest_configure(config: Config) -> None:
+    if config.option.runxfail:
+        # yay a hack
+        import pytest
+
+        old = pytest.xfail
+        config.add_cleanup(lambda: setattr(pytest, "xfail", old))
+
+        def nop(*args, **kwargs):
+            pass
+
+        nop.Exception = xfail.Exception  # type: ignore[attr-defined]
+        setattr(pytest, "xfail", nop)
+
+    config.addinivalue_line(
+        "markers",
+        "skip(reason=None): skip the given test function with an optional reason. "
+        'Example: skip(reason="no way of currently testing this") skips the '
+        "test.",
+    )
+    config.addinivalue_line(
+        "markers",
+        "skipif(condition, ..., *, reason=...): "
+        "skip the given test function if any of the conditions evaluate to True. "
+        "Example: skipif(sys.platform == 'win32') skips the test if we are on the win32 platform. "
+        "See https://docs.pytest.org/en/stable/reference/reference.html#pytest-mark-skipif",
+    )
+    config.addinivalue_line(
+        "markers",
+        "xfail(condition, ..., *, reason=..., run=True, raises=None, strict=xfail_strict): "
+        "mark the test function as an expected failure if any of the conditions "
+        "evaluate to True. Optionally specify a reason for better reporting "
+        "and run=False if you don't even want to execute the test function. "
+        "If only specific exception(s) are expected, you can list them in "
+        "raises, and if the test fails in other ways, it will be reported as "
+        "a true failure. See https://docs.pytest.org/en/stable/reference/reference.html#pytest-mark-xfail",
+    )
+
+
+def evaluate_condition(item: Item, mark: Mark, condition: object) -> Tuple[bool, str]:
+    """Evaluate a single skipif/xfail condition.
+
+    If an old-style string condition is given, it is eval()'d, otherwise the
+    condition is bool()'d. If this fails, an appropriately formatted pytest.fail
+    is raised.
+
+    Returns (result, reason). The reason is only relevant if the result is True.
+    """
+    # String condition.
+    if isinstance(condition, str):
+        globals_ = {
+            "os": os,
+            "sys": sys,
+            "platform": platform,
+            "config": item.config,
+        }
+        for dictionary in reversed(
+            item.ihook.pytest_markeval_namespace(config=item.config)
+        ):
+            if not isinstance(dictionary, Mapping):
+                raise ValueError(
+                    "pytest_markeval_namespace() needs to return a dict, got {!r}".format(
+                        dictionary
+                    )
+                )
+            globals_.update(dictionary)
+        if hasattr(item, "obj"):
+            globals_.update(item.obj.__globals__)  # type: ignore[attr-defined]
+        try:
+            filename = f"<{mark.name} condition>"
+            condition_code = compile(condition, filename, "eval")
+            result = eval(condition_code, globals_)
+        except SyntaxError as exc:
+            msglines = [
+                "Error evaluating %r condition" % mark.name,
+                "    " + condition,
+                "    " + " " * (exc.offset or 0) + "^",
+                "SyntaxError: invalid syntax",
+            ]
+            fail("\n".join(msglines), pytrace=False)
+        except Exception as exc:
+            msglines = [
+                "Error evaluating %r condition" % mark.name,
+                "    " + condition,
+                *traceback.format_exception_only(type(exc), exc),
+            ]
+            fail("\n".join(msglines), pytrace=False)
+
+    # Boolean condition.
+    else:
+        try:
+            result = bool(condition)
+        except Exception as exc:
+            msglines = [
+                "Error evaluating %r condition as a boolean" % mark.name,
+                *traceback.format_exception_only(type(exc), exc),
+            ]
+            fail("\n".join(msglines), pytrace=False)
+
+    reason = mark.kwargs.get("reason", None)
+    if reason is None:
+        if isinstance(condition, str):
+            reason = "condition: " + condition
+        else:
+            # XXX better be checked at collection time
+            msg = (
+                "Error evaluating %r: " % mark.name
+                + "you need to specify reason=STRING when using booleans as conditions."
+            )
+            fail(msg, pytrace=False)
+
+    return result, reason
+
+
+@dataclasses.dataclass(frozen=True)
+class Skip:
+    """The result of evaluate_skip_marks()."""
+
+    reason: str = "unconditional skip"
+
+
+def evaluate_skip_marks(item: Item) -> Optional[Skip]:
+    """Evaluate skip and skipif marks on item, returning Skip if triggered."""
+    for mark in item.iter_markers(name="skipif"):
+        if "condition" not in mark.kwargs:
+            conditions = mark.args
+        else:
+            conditions = (mark.kwargs["condition"],)
+
+        # Unconditional.
+        if not conditions:
+            reason = mark.kwargs.get("reason", "")
+            return Skip(reason)
+
+        # If any of the conditions are true.
+        for condition in conditions:
+            result, reason = evaluate_condition(item, mark, condition)
+            if result:
+                return Skip(reason)
+
+    for mark in item.iter_markers(name="skip"):
+        try:
+            return Skip(*mark.args, **mark.kwargs)
+        except TypeError as e:
+            raise TypeError(str(e) + " - maybe you meant pytest.mark.skipif?") from None
+
+    return None
+
+
+@dataclasses.dataclass(frozen=True)
+class Xfail:
+    """The result of evaluate_xfail_marks()."""
+
+    __slots__ = ("reason", "run", "strict", "raises")
+
+    reason: str
+    run: bool
+    strict: bool
+    raises: Optional[Tuple[Type[BaseException], ...]]
+
+
+def evaluate_xfail_marks(item: Item) -> Optional[Xfail]:
+    """Evaluate xfail marks on item, returning Xfail if triggered."""
+    for mark in item.iter_markers(name="xfail"):
+        run = mark.kwargs.get("run", True)
+        strict = mark.kwargs.get("strict", item.config.getini("xfail_strict"))
+        raises = mark.kwargs.get("raises", None)
+        if "condition" not in mark.kwargs:
+            conditions = mark.args
+        else:
+            conditions = (mark.kwargs["condition"],)
+
+        # Unconditional.
+        if not conditions:
+            reason = mark.kwargs.get("reason", "")
+            return Xfail(reason, run, strict, raises)
+
+        # If any of the conditions are true.
+        for condition in conditions:
+            result, reason = evaluate_condition(item, mark, condition)
+            if result:
+                return Xfail(reason, run, strict, raises)
+
+    return None
+
+
+# Saves the xfail mark evaluation. Can be refreshed during call if None.
+xfailed_key = StashKey[Optional[Xfail]]()
+
+
+@hookimpl(tryfirst=True)
+def pytest_runtest_setup(item: Item) -> None:
+    skipped = evaluate_skip_marks(item)
+    if skipped:
+        raise skip.Exception(skipped.reason, _use_item_location=True)
+
+    item.stash[xfailed_key] = xfailed = evaluate_xfail_marks(item)
+    if xfailed and not item.config.option.runxfail and not xfailed.run:
+        xfail("[NOTRUN] " + xfailed.reason)
+
+
+@hookimpl(hookwrapper=True)
+def pytest_runtest_call(item: Item) -> Generator[None, None, None]:
+    xfailed = item.stash.get(xfailed_key, None)
+    if xfailed is None:
+        item.stash[xfailed_key] = xfailed = evaluate_xfail_marks(item)
+
+    if xfailed and not item.config.option.runxfail and not xfailed.run:
+        xfail("[NOTRUN] " + xfailed.reason)
+
+    yield
+
+    # The test run may have added an xfail mark dynamically.
+    xfailed = item.stash.get(xfailed_key, None)
+    if xfailed is None:
+        item.stash[xfailed_key] = xfailed = evaluate_xfail_marks(item)
+
+
+@hookimpl(hookwrapper=True)
+def pytest_runtest_makereport(item: Item, call: CallInfo[None]):
+    outcome = yield
+    rep = outcome.get_result()
+    xfailed = item.stash.get(xfailed_key, None)
+    if item.config.option.runxfail:
+        pass  # don't interfere
+    elif call.excinfo and isinstance(call.excinfo.value, xfail.Exception):
+        assert call.excinfo.value.msg is not None
+        rep.wasxfail = "reason: " + call.excinfo.value.msg
+        rep.outcome = "skipped"
+    elif not rep.skipped and xfailed:
+        if call.excinfo:
+            raises = xfailed.raises
+            if raises is not None and not isinstance(call.excinfo.value, raises):
+                rep.outcome = "failed"
+            else:
+                rep.outcome = "skipped"
+                rep.wasxfail = xfailed.reason
+        elif call.when == "call":
+            if xfailed.strict:
+                rep.outcome = "failed"
+                rep.longrepr = "[XPASS(strict)] " + xfailed.reason
+            else:
+                rep.outcome = "passed"
+                rep.wasxfail = xfailed.reason
+
+
+def pytest_report_teststatus(report: BaseReport) -> Optional[Tuple[str, str, str]]:
+    if hasattr(report, "wasxfail"):
+        if report.skipped:
+            return "xfailed", "x", "XFAIL"
+        elif report.passed:
+            return "xpassed", "X", "XPASS"
+    return None
diff --git a/contrib/python/pytest/py3/_pytest/stash.py b/contrib/python/pytest/py3/_pytest/stash.py
new file mode 100644
index 0000000000..e61d75b95f
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/stash.py
@@ -0,0 +1,112 @@
+from typing import Any
+from typing import cast
+from typing import Dict
+from typing import Generic
+from typing import TypeVar
+from typing import Union
+
+
+__all__ = ["Stash", "StashKey"]
+
+
+T = TypeVar("T")
+D = TypeVar("D")
+
+
+class StashKey(Generic[T]):
+    """``StashKey`` is an object used as a key to a :class:`Stash`.
+
+    A ``StashKey`` is associated with the type ``T`` of the value of the key.
+
+    A ``StashKey`` is unique and cannot conflict with another key.
+    """
+
+    __slots__ = ()
+
+
+class Stash:
+    r"""``Stash`` is a type-safe heterogeneous mutable mapping that
+    allows keys and value types to be defined separately from
+    where it (the ``Stash``) is created.
+
+    Usually you will be given an object which has a ``Stash``, for example
+    :class:`~pytest.Config` or a :class:`~_pytest.nodes.Node`:
+
+    .. code-block:: python
+
+        stash: Stash = some_object.stash
+
+    If a module or plugin wants to store data in this ``Stash``, it creates
+    :class:`StashKey`\s for its keys (at the module level):
+
+    .. code-block:: python
+
+        # At the top-level of the module
+        some_str_key = StashKey[str]()
+        some_bool_key = StashKey[bool]()
+
+    To store information:
+
+    .. code-block:: python
+
+        # Value type must match the key.
+        stash[some_str_key] = "value"
+        stash[some_bool_key] = True
+
+    To retrieve the information:
+
+    .. code-block:: python
+
+        # The static type of some_str is str.
+        some_str = stash[some_str_key]
+        # The static type of some_bool is bool.
+        some_bool = stash[some_bool_key]
+    """
+
+    __slots__ = ("_storage",)
+
+    def __init__(self) -> None:
+        self._storage: Dict[StashKey[Any], object] = {}
+
+    def __setitem__(self, key: StashKey[T], value: T) -> None:
+        """Set a value for key."""
+        self._storage[key] = value
+
+    def __getitem__(self, key: StashKey[T]) -> T:
+        """Get the value for key.
+
+        Raises ``KeyError`` if the key wasn't set before.
+        """
+        return cast(T, self._storage[key])
+
+    def get(self, key: StashKey[T], default: D) -> Union[T, D]:
+        """Get the value for key, or return default if the key wasn't set
+        before."""
+        try:
+            return self[key]
+        except KeyError:
+            return default
+
+    def setdefault(self, key: StashKey[T], default: T) -> T:
+        """Return the value of key if already set, otherwise set the value
+        of key to default and return default."""
+        try:
+            return self[key]
+        except KeyError:
+            self[key] = default
+            return default
+
+    def __delitem__(self, key: StashKey[T]) -> None:
+        """Delete the value for key.
+
+        Raises ``KeyError`` if the key wasn't set before.
+        """
+        del self._storage[key]
+
+    def __contains__(self, key: StashKey[T]) -> bool:
+        """Return whether key was set."""
+        return key in self._storage
+
+    def __len__(self) -> int:
+        """Return how many items exist in the stash."""
+        return len(self._storage)
diff --git a/contrib/python/pytest/py3/_pytest/stepwise.py b/contrib/python/pytest/py3/_pytest/stepwise.py
new file mode 100644
index 0000000000..74ad9dbd4d
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/stepwise.py
@@ -0,0 +1,130 @@
+from typing import List
+from typing import Optional
+from typing import TYPE_CHECKING
+
+import pytest
+from _pytest import nodes
+from _pytest.config import Config
+from _pytest.config.argparsing import Parser
+from _pytest.main import Session
+from _pytest.reports import TestReport
+
+if TYPE_CHECKING:
+    from _pytest.cacheprovider import Cache
+
+STEPWISE_CACHE_DIR = "cache/stepwise"
+
+
+def pytest_addoption(parser: Parser) -> None:
+    group = parser.getgroup("general")
+    group.addoption(
+        "--sw",
+        "--stepwise",
+        action="store_true",
+        default=False,
+        dest="stepwise",
+        help="Exit on test failure and continue from last failing test next time",
+    )
+    group.addoption(
+        "--sw-skip",
+        "--stepwise-skip",
+        action="store_true",
+        default=False,
+        dest="stepwise_skip",
+        help="Ignore the first failing test but stop on the next failing test. "
+        "Implicitly enables --stepwise.",
+    )
+
+
+@pytest.hookimpl
+def pytest_configure(config: Config) -> None:
+    if config.option.stepwise_skip:
+        # allow --stepwise-skip to work on it's own merits.
+        config.option.stepwise = True
+    if config.getoption("stepwise"):
+        config.pluginmanager.register(StepwisePlugin(config), "stepwiseplugin")
+
+
+def pytest_sessionfinish(session: Session) -> None:
+    if not session.config.getoption("stepwise"):
+        assert session.config.cache is not None
+        if hasattr(session.config, "workerinput"):
+            # Do not update cache if this process is a xdist worker to prevent
+            # race conditions (#10641).
+            return
+        # Clear the list of failing tests if the plugin is not active.
+        session.config.cache.set(STEPWISE_CACHE_DIR, [])
+
+
+class StepwisePlugin:
+    def __init__(self, config: Config) -> None:
+        self.config = config
+        self.session: Optional[Session] = None
+        self.report_status = ""
+        assert config.cache is not None
+        self.cache: Cache = config.cache
+        self.lastfailed: Optional[str] = self.cache.get(STEPWISE_CACHE_DIR, None)
+        self.skip: bool = config.getoption("stepwise_skip")
+
+    def pytest_sessionstart(self, session: Session) -> None:
+        self.session = session
+
+    def pytest_collection_modifyitems(
+        self, config: Config, items: List[nodes.Item]
+    ) -> None:
+        if not self.lastfailed:
+            self.report_status = "no previously failed tests, not skipping."
+            return
+
+        # check all item nodes until we find a match on last failed
+        failed_index = None
+        for index, item in enumerate(items):
+            if item.nodeid == self.lastfailed:
+                failed_index = index
+                break
+
+        # If the previously failed test was not found among the test items,
+        # do not skip any tests.
+        if failed_index is None:
+            self.report_status = "previously failed test not found, not skipping."
+        else:
+            self.report_status = f"skipping {failed_index} already passed items."
+            deselected = items[:failed_index]
+            del items[:failed_index]
+            config.hook.pytest_deselected(items=deselected)
+
+    def pytest_runtest_logreport(self, report: TestReport) -> None:
+        if report.failed:
+            if self.skip:
+                # Remove test from the failed ones (if it exists) and unset the skip option
+                # to make sure the following tests will not be skipped.
+                if report.nodeid == self.lastfailed:
+                    self.lastfailed = None
+
+                self.skip = False
+            else:
+                # Mark test as the last failing and interrupt the test session.
+                self.lastfailed = report.nodeid
+                assert self.session is not None
+                self.session.shouldstop = (
+                    "Test failed, continuing from this test next run."
+                )
+
+        else:
+            # If the test was actually run and did pass.
+            if report.when == "call":
+                # Remove test from the failed ones, if exists.
+                if report.nodeid == self.lastfailed:
+                    self.lastfailed = None
+
+    def pytest_report_collectionfinish(self) -> Optional[str]:
+        if self.config.getoption("verbose") >= 0 and self.report_status:
+            return f"stepwise: {self.report_status}"
+        return None
+
+    def pytest_sessionfinish(self) -> None:
+        if hasattr(self.config, "workerinput"):
+            # Do not update cache if this process is a xdist worker to prevent
+            # race conditions (#10641).
+            return
+        self.cache.set(STEPWISE_CACHE_DIR, self.lastfailed)
diff --git a/contrib/python/pytest/py3/_pytest/terminal.py b/contrib/python/pytest/py3/_pytest/terminal.py
new file mode 100644
index 0000000000..b0cdb58ce0
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/terminal.py
@@ -0,0 +1,1481 @@
+"""Terminal reporting of the full testing process.
+
+This is a good source for looking at the various reporting hooks.
+"""
+import argparse
+import dataclasses
+import datetime
+import inspect
+import platform
+import sys
+import textwrap
+import warnings
+from collections import Counter
+from functools import partial
+from pathlib import Path
+from typing import Any
+from typing import Callable
+from typing import cast
+from typing import ClassVar
+from typing import Dict
+from typing import Generator
+from typing import List
+from typing import Mapping
+from typing import NamedTuple
+from typing import Optional
+from typing import Sequence
+from typing import Set
+from typing import TextIO
+from typing import Tuple
+from typing import TYPE_CHECKING
+from typing import Union
+
+import pluggy
+
+import _pytest._version
+from _pytest import nodes
+from _pytest import timing
+from _pytest._code import ExceptionInfo
+from _pytest._code.code import ExceptionRepr
+from _pytest._io import TerminalWriter
+from _pytest._io.wcwidth import wcswidth
+from _pytest.assertion.util import running_on_ci
+from _pytest.compat import final
+from _pytest.config import _PluggyPlugin
+from _pytest.config import Config
+from _pytest.config import ExitCode
+from _pytest.config import hookimpl
+from _pytest.config.argparsing import Parser
+from _pytest.nodes import Item
+from _pytest.nodes import Node
+from _pytest.pathlib import absolutepath
+from _pytest.pathlib import bestrelpath
+from _pytest.reports import BaseReport
+from _pytest.reports import CollectReport
+from _pytest.reports import TestReport
+
+if TYPE_CHECKING:
+    from typing_extensions import Literal
+
+    from _pytest.main import Session
+
+
+REPORT_COLLECTING_RESOLUTION = 0.5
+
+KNOWN_TYPES = (
+    "failed",
+    "passed",
+    "skipped",
+    "deselected",
+    "xfailed",
+    "xpassed",
+    "warnings",
+    "error",
+)
+
+_REPORTCHARS_DEFAULT = "fE"
+
+
+class MoreQuietAction(argparse.Action):
+    """A modified copy of the argparse count action which counts down and updates
+    the legacy quiet attribute at the same time.
+
+    Used to unify verbosity handling.
+    """
+
+    def __init__(
+        self,
+        option_strings: Sequence[str],
+        dest: str,
+        default: object = None,
+        required: bool = False,
+        help: Optional[str] = None,
+    ) -> None:
+        super().__init__(
+            option_strings=option_strings,
+            dest=dest,
+            nargs=0,
+            default=default,
+            required=required,
+            help=help,
+        )
+
+    def __call__(
+        self,
+        parser: argparse.ArgumentParser,
+        namespace: argparse.Namespace,
+        values: Union[str, Sequence[object], None],
+        option_string: Optional[str] = None,
+    ) -> None:
+        new_count = getattr(namespace, self.dest, 0) - 1
+        setattr(namespace, self.dest, new_count)
+        # todo Deprecate config.quiet
+        namespace.quiet = getattr(namespace, "quiet", 0) + 1
+
+
+class TestShortLogReport(NamedTuple):
+    """Used to store the test status result category, shortletter and verbose word.
+    For example ``"rerun", "R", ("RERUN", {"yellow": True})``.
+
+    :ivar category:
+        The class of result, for example ``“passed”``, ``“skipped”``, ``“error”``, or the empty string.
+
+    :ivar letter:
+        The short letter shown as testing progresses, for example ``"."``, ``"s"``, ``"E"``, or the empty string.
+
+    :ivar word:
+        Verbose word is shown as testing progresses in verbose mode, for example ``"PASSED"``, ``"SKIPPED"``,
+        ``"ERROR"``, or the empty string.
+    """
+
+    category: str
+    letter: str
+    word: Union[str, Tuple[str, Mapping[str, bool]]]
+
+
+def pytest_addoption(parser: Parser) -> None:
+    group = parser.getgroup("terminal reporting", "Reporting", after="general")
+    group._addoption(
+        "-v",
+        "--verbose",
+        action="count",
+        default=0,
+        dest="verbose",
+        help="Increase verbosity",
+    )
+    group._addoption(
+        "--no-header",
+        action="store_true",
+        default=False,
+        dest="no_header",
+        help="Disable header",
+    )
+    group._addoption(
+        "--no-summary",
+        action="store_true",
+        default=False,
+        dest="no_summary",
+        help="Disable summary",
+    )
+    group._addoption(
+        "-q",
+        "--quiet",
+        action=MoreQuietAction,
+        default=0,
+        dest="verbose",
+        help="Decrease verbosity",
+    )
+    group._addoption(
+        "--verbosity",
+        dest="verbose",
+        type=int,
+        default=0,
+        help="Set verbosity. Default: 0.",
+    )
+    group._addoption(
+        "-r",
+        action="store",
+        dest="reportchars",
+        default=_REPORTCHARS_DEFAULT,
+        metavar="chars",
+        help="Show extra test summary info as specified by chars: (f)ailed, "
+        "(E)rror, (s)kipped, (x)failed, (X)passed, "
+        "(p)assed, (P)assed with output, (a)ll except passed (p/P), or (A)ll. "
+        "(w)arnings are enabled by default (see --disable-warnings), "
+        "'N' can be used to reset the list. (default: 'fE').",
+    )
+    group._addoption(
+        "--disable-warnings",
+        "--disable-pytest-warnings",
+        default=False,
+        dest="disable_warnings",
+        action="store_true",
+        help="Disable warnings summary",
+    )
+    group._addoption(
+        "-l",
+        "--showlocals",
+        action="store_true",
+        dest="showlocals",
+        default=False,
+        help="Show locals in tracebacks (disabled by default)",
+    )
+    group._addoption(
+        "--no-showlocals",
+        action="store_false",
+        dest="showlocals",
+        help="Hide locals in tracebacks (negate --showlocals passed through addopts)",
+    )
+    group._addoption(
+        "--tb",
+        metavar="style",
+        action="store",
+        dest="tbstyle",
+        default="auto",
+        choices=["auto", "long", "short", "no", "line", "native"],
+        help="Traceback print mode (auto/long/short/line/native/no)",
+    )
+    group._addoption(
+        "--show-capture",
+        action="store",
+        dest="showcapture",
+        choices=["no", "stdout", "stderr", "log", "all"],
+        default="all",
+        help="Controls how captured stdout/stderr/log is shown on failed tests. "
+        "Default: all.",
+    )
+    group._addoption(
+        "--fulltrace",
+        "--full-trace",
+        action="store_true",
+        default=False,
+        help="Don't cut any tracebacks (default is to cut)",
+    )
+    group._addoption(
+        "--color",
+        metavar="color",
+        action="store",
+        dest="color",
+        default="auto",
+        choices=["yes", "no", "auto"],
+        help="Color terminal output (yes/no/auto)",
+    )
+    group._addoption(
+        "--code-highlight",
+        default="yes",
+        choices=["yes", "no"],
+        help="Whether code should be highlighted (only if --color is also enabled). "
+        "Default: yes.",
+    )
+
+    parser.addini(
+        "console_output_style",
+        help='Console output: "classic", or with additional progress information '
+        '("progress" (percentage) | "count" | "progress-even-when-capture-no" (forces '
+        "progress even when capture=no)",
+        default="progress",
+    )
+
+
+def pytest_configure(config: Config) -> None:
+    reporter = TerminalReporter(config, sys.stdout)
+    config.pluginmanager.register(reporter, "terminalreporter")
+    if config.option.debug or config.option.traceconfig:
+
+        def mywriter(tags, args):
+            msg = " ".join(map(str, args))
+            reporter.write_line("[traceconfig] " + msg)
+
+        config.trace.root.setprocessor("pytest:config", mywriter)
+
+
+def getreportopt(config: Config) -> str:
+    reportchars: str = config.option.reportchars
+
+    old_aliases = {"F", "S"}
+    reportopts = ""
+    for char in reportchars:
+        if char in old_aliases:
+            char = char.lower()
+        if char == "a":
+            reportopts = "sxXEf"
+        elif char == "A":
+            reportopts = "PpsxXEf"
+        elif char == "N":
+            reportopts = ""
+        elif char not in reportopts:
+            reportopts += char
+
+    if not config.option.disable_warnings and "w" not in reportopts:
+        reportopts = "w" + reportopts
+    elif config.option.disable_warnings and "w" in reportopts:
+        reportopts = reportopts.replace("w", "")
+
+    return reportopts
+
+
+@hookimpl(trylast=True)  # after _pytest.runner
+def pytest_report_teststatus(report: BaseReport) -> Tuple[str, str, str]:
+    letter = "F"
+    if report.passed:
+        letter = "."
+    elif report.skipped:
+        letter = "s"
+
+    outcome: str = report.outcome
+    if report.when in ("collect", "setup", "teardown") and outcome == "failed":
+        outcome = "error"
+        letter = "E"
+
+    return outcome, letter, outcome.upper()
+
+
+@dataclasses.dataclass
+class WarningReport:
+    """Simple structure to hold warnings information captured by ``pytest_warning_recorded``.
+
+    :ivar str message:
+        User friendly message about the warning.
+    :ivar str|None nodeid:
+        nodeid that generated the warning (see ``get_location``).
+    :ivar tuple fslocation:
+        File system location of the source of the warning (see ``get_location``).
+    """
+
+    message: str
+    nodeid: Optional[str] = None
+    fslocation: Optional[Tuple[str, int]] = None
+
+    count_towards_summary: ClassVar = True
+
+    def get_location(self, config: Config) -> Optional[str]:
+        """Return the more user-friendly information about the location of a warning, or None."""
+        if self.nodeid:
+            return self.nodeid
+        if self.fslocation:
+            filename, linenum = self.fslocation
+            relpath = bestrelpath(config.invocation_params.dir, absolutepath(filename))
+            return f"{relpath}:{linenum}"
+        return None
+
+
+@final
+class TerminalReporter:
+    def __init__(self, config: Config, file: Optional[TextIO] = None) -> None:
+        import _pytest.config
+
+        self.config = config
+        self._numcollected = 0
+        self._session: Optional[Session] = None
+        self._showfspath: Optional[bool] = None
+
+        self.stats: Dict[str, List[Any]] = {}
+        self._main_color: Optional[str] = None
+        self._known_types: Optional[List[str]] = None
+        self.startpath = config.invocation_params.dir
+        if file is None:
+            file = sys.stdout
+        self._tw = _pytest.config.create_terminal_writer(config, file)
+        self._screen_width = self._tw.fullwidth
+        self.currentfspath: Union[None, Path, str, int] = None
+        self.reportchars = getreportopt(config)
+        self.hasmarkup = self._tw.hasmarkup
+        self.isatty = file.isatty()
+        self._progress_nodeids_reported: Set[str] = set()
+        self._show_progress_info = self._determine_show_progress_info()
+        self._collect_report_last_write: Optional[float] = None
+        self._already_displayed_warnings: Optional[int] = None
+        self._keyboardinterrupt_memo: Optional[ExceptionRepr] = None
+
+    def _determine_show_progress_info(self) -> "Literal['progress', 'count', False]":
+        """Return whether we should display progress information based on the current config."""
+        # do not show progress if we are not capturing output (#3038) unless explicitly
+        # overridden by progress-even-when-capture-no
+        if (
+            self.config.getoption("capture", "no") == "no"
+            and self.config.getini("console_output_style")
+            != "progress-even-when-capture-no"
+        ):
+            return False
+        # do not show progress if we are showing fixture setup/teardown
+        if self.config.getoption("setupshow", False):
+            return False
+        cfg: str = self.config.getini("console_output_style")
+        if cfg == "progress" or cfg == "progress-even-when-capture-no":
+            return "progress"
+        elif cfg == "count":
+            return "count"
+        else:
+            return False
+
+    @property
+    def verbosity(self) -> int:
+        verbosity: int = self.config.option.verbose
+        return verbosity
+
+    @property
+    def showheader(self) -> bool:
+        return self.verbosity >= 0
+
+    @property
+    def no_header(self) -> bool:
+        return bool(self.config.option.no_header)
+
+    @property
+    def no_summary(self) -> bool:
+        return bool(self.config.option.no_summary)
+
+    @property
+    def showfspath(self) -> bool:
+        if self._showfspath is None:
+            return self.verbosity >= 0
+        return self._showfspath
+
+    @showfspath.setter
+    def showfspath(self, value: Optional[bool]) -> None:
+        self._showfspath = value
+
+    @property
+    def showlongtestinfo(self) -> bool:
+        return self.verbosity > 0
+
+    def hasopt(self, char: str) -> bool:
+        char = {"xfailed": "x", "skipped": "s"}.get(char, char)
+        return char in self.reportchars
+
+    def write_fspath_result(self, nodeid: str, res, **markup: bool) -> None:
+        fspath = self.config.rootpath / nodeid.split("::")[0]
+        if self.currentfspath is None or fspath != self.currentfspath:
+            if self.currentfspath is not None and self._show_progress_info:
+                self._write_progress_information_filling_space()
+            self.currentfspath = fspath
+            relfspath = bestrelpath(self.startpath, fspath)
+            self._tw.line()
+            self._tw.write(relfspath + " ")
+        self._tw.write(res, flush=True, **markup)
+
+    def write_ensure_prefix(self, prefix: str, extra: str = "", **kwargs) -> None:
+        if self.currentfspath != prefix:
+            self._tw.line()
+            self.currentfspath = prefix
+            self._tw.write(prefix)
+        if extra:
+            self._tw.write(extra, **kwargs)
+            self.currentfspath = -2
+
+    def ensure_newline(self) -> None:
+        if self.currentfspath:
+            self._tw.line()
+            self.currentfspath = None
+
+    def wrap_write(
+        self,
+        content: str,
+        *,
+        flush: bool = False,
+        margin: int = 8,
+        line_sep: str = "\n",
+        **markup: bool,
+    ) -> None:
+        """Wrap message with margin for progress info."""
+        width_of_current_line = self._tw.width_of_current_line
+        wrapped = line_sep.join(
+            textwrap.wrap(
+                " " * width_of_current_line + content,
+                width=self._screen_width - margin,
+                drop_whitespace=True,
+                replace_whitespace=False,
+            ),
+        )
+        wrapped = wrapped[width_of_current_line:]
+        self._tw.write(wrapped, flush=flush, **markup)
+
+    def write(self, content: str, *, flush: bool = False, **markup: bool) -> None:
+        self._tw.write(content, flush=flush, **markup)
+
+    def flush(self) -> None:
+        self._tw.flush()
+
+    def write_line(self, line: Union[str, bytes], **markup: bool) -> None:
+        if not isinstance(line, str):
+            line = str(line, errors="replace")
+        self.ensure_newline()
+        self._tw.line(line, **markup)
+
+    def rewrite(self, line: str, **markup: bool) -> None:
+        """Rewinds the terminal cursor to the beginning and writes the given line.
+
+        :param erase:
+            If True, will also add spaces until the full terminal width to ensure
+            previous lines are properly erased.
+
+        The rest of the keyword arguments are markup instructions.
+        """
+        erase = markup.pop("erase", False)
+        if erase:
+            fill_count = self._tw.fullwidth - len(line) - 1
+            fill = " " * fill_count
+        else:
+            fill = ""
+        line = str(line)
+        self._tw.write("\r" + line + fill, **markup)
+
+    def write_sep(
+        self,
+        sep: str,
+        title: Optional[str] = None,
+        fullwidth: Optional[int] = None,
+        **markup: bool,
+    ) -> None:
+        self.ensure_newline()
+        self._tw.sep(sep, title, fullwidth, **markup)
+
+    def section(self, title: str, sep: str = "=", **kw: bool) -> None:
+        self._tw.sep(sep, title, **kw)
+
+    def line(self, msg: str, **kw: bool) -> None:
+        self._tw.line(msg, **kw)
+
+    def _add_stats(self, category: str, items: Sequence[Any]) -> None:
+        set_main_color = category not in self.stats
+        self.stats.setdefault(category, []).extend(items)
+        if set_main_color:
+            self._set_main_color()
+
+    def pytest_internalerror(self, excrepr: ExceptionRepr) -> bool:
+        for line in str(excrepr).split("\n"):
+            self.write_line("INTERNALERROR> " + line)
+        return True
+
+    def pytest_warning_recorded(
+        self,
+        warning_message: warnings.WarningMessage,
+        nodeid: str,
+    ) -> None:
+        from _pytest.warnings import warning_record_to_str
+
+        fslocation = warning_message.filename, warning_message.lineno
+        message = warning_record_to_str(warning_message)
+
+        warning_report = WarningReport(
+            fslocation=fslocation, message=message, nodeid=nodeid
+        )
+        self._add_stats("warnings", [warning_report])
+
+    def pytest_plugin_registered(self, plugin: _PluggyPlugin) -> None:
+        if self.config.option.traceconfig:
+            msg = f"PLUGIN registered: {plugin}"
+            # XXX This event may happen during setup/teardown time
+            #     which unfortunately captures our output here
+            #     which garbles our output if we use self.write_line.
+            self.write_line(msg)
+
+    def pytest_deselected(self, items: Sequence[Item]) -> None:
+        self._add_stats("deselected", items)
+
+    def pytest_runtest_logstart(
+        self, nodeid: str, location: Tuple[str, Optional[int], str]
+    ) -> None:
+        # Ensure that the path is printed before the
+        # 1st test of a module starts running.
+        if self.showlongtestinfo:
+            line = self._locationline(nodeid, *location)
+            self.write_ensure_prefix(line, "")
+            self.flush()
+        elif self.showfspath:
+            self.write_fspath_result(nodeid, "")
+            self.flush()
+
+    def pytest_runtest_logreport(self, report: TestReport) -> None:
+        self._tests_ran = True
+        rep = report
+
+        res = TestShortLogReport(
+            *self.config.hook.pytest_report_teststatus(report=rep, config=self.config)
+        )
+        category, letter, word = res.category, res.letter, res.word
+        if not isinstance(word, tuple):
+            markup = None
+        else:
+            word, markup = word
+        self._add_stats(category, [rep])
+        if not letter and not word:
+            # Probably passed setup/teardown.
+            return
+        running_xdist = hasattr(rep, "node")
+        if markup is None:
+            was_xfail = hasattr(report, "wasxfail")
+            if rep.passed and not was_xfail:
+                markup = {"green": True}
+            elif rep.passed and was_xfail:
+                markup = {"yellow": True}
+            elif rep.failed:
+                markup = {"red": True}
+            elif rep.skipped:
+                markup = {"yellow": True}
+            else:
+                markup = {}
+        if self.verbosity <= 0:
+            self._tw.write(letter, **markup)
+        else:
+            self._progress_nodeids_reported.add(rep.nodeid)
+            line = self._locationline(rep.nodeid, *rep.location)
+            if not running_xdist:
+                self.write_ensure_prefix(line, word, **markup)
+                if rep.skipped or hasattr(report, "wasxfail"):
+                    reason = _get_raw_skip_reason(rep)
+                    if self.config.option.verbose < 2:
+                        available_width = (
+                            (self._tw.fullwidth - self._tw.width_of_current_line)
+                            - len(" [100%]")
+                            - 1
+                        )
+                        formatted_reason = _format_trimmed(
+                            " ({})", reason, available_width
+                        )
+                    else:
+                        formatted_reason = f" ({reason})"
+
+                    if reason and formatted_reason is not None:
+                        self.wrap_write(formatted_reason)
+                if self._show_progress_info:
+                    self._write_progress_information_filling_space()
+            else:
+                self.ensure_newline()
+                self._tw.write("[%s]" % rep.node.gateway.id)
+                if self._show_progress_info:
+                    self._tw.write(
+                        self._get_progress_information_message() + " ", cyan=True
+                    )
+                else:
+                    self._tw.write(" ")
+                self._tw.write(word, **markup)
+                self._tw.write(" " + line)
+                self.currentfspath = -2
+        self.flush()
+
+    @property
+    def _is_last_item(self) -> bool:
+        assert self._session is not None
+        return len(self._progress_nodeids_reported) == self._session.testscollected
+
+    def pytest_runtest_logfinish(self, nodeid: str) -> None:
+        assert self._session
+        if self.verbosity <= 0 and self._show_progress_info:
+            if self._show_progress_info == "count":
+                num_tests = self._session.testscollected
+                progress_length = len(f" [{num_tests}/{num_tests}]")
+            else:
+                progress_length = len(" [100%]")
+
+            self._progress_nodeids_reported.add(nodeid)
+
+            if self._is_last_item:
+                self._write_progress_information_filling_space()
+            else:
+                main_color, _ = self._get_main_color()
+                w = self._width_of_current_line
+                past_edge = w + progress_length + 1 >= self._screen_width
+                if past_edge:
+                    msg = self._get_progress_information_message()
+                    self._tw.write(msg + "\n", **{main_color: True})
+
+    def _get_progress_information_message(self) -> str:
+        assert self._session
+        collected = self._session.testscollected
+        if self._show_progress_info == "count":
+            if collected:
+                progress = self._progress_nodeids_reported
+                counter_format = f"{{:{len(str(collected))}d}}"
+                format_string = f" [{counter_format}/{{}}]"
+                return format_string.format(len(progress), collected)
+            return f" [ {collected} / {collected} ]"
+        else:
+            if collected:
+                return " [{:3d}%]".format(
+                    len(self._progress_nodeids_reported) * 100 // collected
+                )
+            return " [100%]"
+
+    def _write_progress_information_filling_space(self) -> None:
+        color, _ = self._get_main_color()
+        msg = self._get_progress_information_message()
+        w = self._width_of_current_line
+        fill = self._tw.fullwidth - w - 1
+        self.write(msg.rjust(fill), flush=True, **{color: True})
+
+    @property
+    def _width_of_current_line(self) -> int:
+        """Return the width of the current line."""
+        return self._tw.width_of_current_line
+
+    def pytest_collection(self) -> None:
+        if self.isatty:
+            if self.config.option.verbose >= 0:
+                self.write("collecting ... ", flush=True, bold=True)
+                self._collect_report_last_write = timing.time()
+        elif self.config.option.verbose >= 1:
+            self.write("collecting ... ", flush=True, bold=True)
+
+    def pytest_collectreport(self, report: CollectReport) -> None:
+        if report.failed:
+            self._add_stats("error", [report])
+        elif report.skipped:
+            self._add_stats("skipped", [report])
+        items = [x for x in report.result if isinstance(x, Item)]
+        self._numcollected += len(items)
+        if self.isatty:
+            self.report_collect()
+
+    def report_collect(self, final: bool = False) -> None:
+        if self.config.option.verbose < 0:
+            return
+
+        if not final:
+            # Only write "collecting" report every 0.5s.
+            t = timing.time()
+            if (
+                self._collect_report_last_write is not None
+                and self._collect_report_last_write > t - REPORT_COLLECTING_RESOLUTION
+            ):
+                return
+            self._collect_report_last_write = t
+
+        errors = len(self.stats.get("error", []))
+        skipped = len(self.stats.get("skipped", []))
+        deselected = len(self.stats.get("deselected", []))
+        selected = self._numcollected - deselected
+        line = "collected " if final else "collecting "
+        line += (
+            str(self._numcollected) + " item" + ("" if self._numcollected == 1 else "s")
+        )
+        if errors:
+            line += " / %d error%s" % (errors, "s" if errors != 1 else "")
+        if deselected:
+            line += " / %d deselected" % deselected
+        if skipped:
+            line += " / %d skipped" % skipped
+        if self._numcollected > selected:
+            line += " / %d selected" % selected
+        if self.isatty:
+            self.rewrite(line, bold=True, erase=True)
+            if final:
+                self.write("\n")
+        else:
+            self.write_line(line)
+
+    @hookimpl(trylast=True)
+    def pytest_sessionstart(self, session: "Session") -> None:
+        self._session = session
+        self._sessionstarttime = timing.time()
+        if not self.showheader:
+            return
+        self.write_sep("=", "test session starts", bold=True)
+        verinfo = platform.python_version()
+        if not self.no_header:
+            msg = f"platform {sys.platform} -- Python {verinfo}"
+            pypy_version_info = getattr(sys, "pypy_version_info", None)
+            if pypy_version_info:
+                verinfo = ".".join(map(str, pypy_version_info[:3]))
+                msg += f"[pypy-{verinfo}-{pypy_version_info[3]}]"
+            msg += ", pytest-{}, pluggy-{}".format(
+                _pytest._version.version, pluggy.__version__
+            )
+            if (
+                self.verbosity > 0
+                or self.config.option.debug
+                or getattr(self.config.option, "pastebin", None)
+            ):
+                msg += " -- " + str(sys.executable)
+            self.write_line(msg)
+            lines = self.config.hook.pytest_report_header(
+                config=self.config, start_path=self.startpath
+            )
+            self._write_report_lines_from_hooks(lines)
+
+    def _write_report_lines_from_hooks(
+        self, lines: Sequence[Union[str, Sequence[str]]]
+    ) -> None:
+        for line_or_lines in reversed(lines):
+            if isinstance(line_or_lines, str):
+                self.write_line(line_or_lines)
+            else:
+                for line in line_or_lines:
+                    self.write_line(line)
+
+    def pytest_report_header(self, config: Config) -> List[str]:
+        result = [f"rootdir: {config.rootpath}"]
+
+        if config.inipath:
+            result.append("configfile: " + bestrelpath(config.rootpath, config.inipath))
+
+        if config.args_source == Config.ArgsSource.TESTPATHS:
+            testpaths: List[str] = config.getini("testpaths")
+            result.append("testpaths: {}".format(", ".join(testpaths)))
+
+        plugininfo = config.pluginmanager.list_plugin_distinfo()
+        if plugininfo:
+            result.append("plugins: %s" % ", ".join(_plugin_nameversions(plugininfo)))
+        return result
+
+    def pytest_collection_finish(self, session: "Session") -> None:
+        self.report_collect(True)
+
+        lines = self.config.hook.pytest_report_collectionfinish(
+            config=self.config,
+            start_path=self.startpath,
+            items=session.items,
+        )
+        self._write_report_lines_from_hooks(lines)
+
+        if self.config.getoption("collectonly"):
+            if session.items:
+                if self.config.option.verbose > -1:
+                    self._tw.line("")
+                self._printcollecteditems(session.items)
+
+            failed = self.stats.get("failed")
+            if failed:
+                self._tw.sep("!", "collection failures")
+                for rep in failed:
+                    rep.toterminal(self._tw)
+
+    def _printcollecteditems(self, items: Sequence[Item]) -> None:
+        if self.config.option.verbose < 0:
+            if self.config.option.verbose < -1:
+                counts = Counter(item.nodeid.split("::", 1)[0] for item in items)
+                for name, count in sorted(counts.items()):
+                    self._tw.line("%s: %d" % (name, count))
+            else:
+                for item in items:
+                    self._tw.line(item.nodeid)
+            return
+        stack: List[Node] = []
+        indent = ""
+        for item in items:
+            needed_collectors = item.listchain()[1:]  # strip root node
+            while stack:
+                if stack == needed_collectors[: len(stack)]:
+                    break
+                stack.pop()
+            for col in needed_collectors[len(stack) :]:
+                stack.append(col)
+                indent = (len(stack) - 1) * "  "
+                self._tw.line(f"{indent}{col}")
+                if self.config.option.verbose >= 1:
+                    obj = getattr(col, "obj", None)
+                    doc = inspect.getdoc(obj) if obj else None
+                    if doc:
+                        for line in doc.splitlines():
+                            self._tw.line("{}{}".format(indent + "  ", line))
+
+    @hookimpl(hookwrapper=True)
+    def pytest_sessionfinish(
+        self, session: "Session", exitstatus: Union[int, ExitCode]
+    ):
+        outcome = yield
+        outcome.get_result()
+        self._tw.line("")
+        summary_exit_codes = (
+            ExitCode.OK,
+            ExitCode.TESTS_FAILED,
+            ExitCode.INTERRUPTED,
+            ExitCode.USAGE_ERROR,
+            ExitCode.NO_TESTS_COLLECTED,
+        )
+        if exitstatus in summary_exit_codes and not self.no_summary:
+            self.config.hook.pytest_terminal_summary(
+                terminalreporter=self, exitstatus=exitstatus, config=self.config
+            )
+        if session.shouldfail:
+            self.write_sep("!", str(session.shouldfail), red=True)
+        if exitstatus == ExitCode.INTERRUPTED:
+            self._report_keyboardinterrupt()
+            self._keyboardinterrupt_memo = None
+        elif session.shouldstop:
+            self.write_sep("!", str(session.shouldstop), red=True)
+        self.summary_stats()
+
+    @hookimpl(hookwrapper=True)
+    def pytest_terminal_summary(self) -> Generator[None, None, None]:
+        self.summary_errors()
+        self.summary_failures()
+        self.summary_warnings()
+        self.summary_passes()
+        yield
+        self.short_test_summary()
+        # Display any extra warnings from teardown here (if any).
+        self.summary_warnings()
+
+    def pytest_keyboard_interrupt(self, excinfo: ExceptionInfo[BaseException]) -> None:
+        self._keyboardinterrupt_memo = excinfo.getrepr(funcargs=True)
+
+    def pytest_unconfigure(self) -> None:
+        if self._keyboardinterrupt_memo is not None:
+            self._report_keyboardinterrupt()
+
+    def _report_keyboardinterrupt(self) -> None:
+        excrepr = self._keyboardinterrupt_memo
+        assert excrepr is not None
+        assert excrepr.reprcrash is not None
+        msg = excrepr.reprcrash.message
+        self.write_sep("!", msg)
+        if "KeyboardInterrupt" in msg:
+            if self.config.option.fulltrace:
+                excrepr.toterminal(self._tw)
+            else:
+                excrepr.reprcrash.toterminal(self._tw)
+                self._tw.line(
+                    "(to show a full traceback on KeyboardInterrupt use --full-trace)",
+                    yellow=True,
+                )
+
+    def _locationline(
+        self, nodeid: str, fspath: str, lineno: Optional[int], domain: str
+    ) -> str:
+        def mkrel(nodeid: str) -> str:
+            line = self.config.cwd_relative_nodeid(nodeid)
+            if domain and line.endswith(domain):
+                line = line[: -len(domain)]
+                values = domain.split("[")
+                values[0] = values[0].replace(".", "::")  # don't replace '.' in params
+                line += "[".join(values)
+            return line
+
+        # collect_fspath comes from testid which has a "/"-normalized path.
+        if fspath:
+            res = mkrel(nodeid)
+            if self.verbosity >= 2 and nodeid.split("::")[0] != fspath.replace(
+                "\\", nodes.SEP
+            ):
+                res += " <- " + bestrelpath(self.startpath, Path(fspath))
+        else:
+            res = "[location]"
+        return res + " "
+
+    def _getfailureheadline(self, rep):
+        head_line = rep.head_line
+        if head_line:
+            return head_line
+        return "test session"  # XXX?
+
+    def _getcrashline(self, rep):
+        try:
+            return str(rep.longrepr.reprcrash)
+        except AttributeError:
+            try:
+                return str(rep.longrepr)[:50]
+            except AttributeError:
+                return ""
+
+    #
+    # Summaries for sessionfinish.
+    #
+    def getreports(self, name: str):
+        return [x for x in self.stats.get(name, ()) if not hasattr(x, "_pdbshown")]
+
+    def summary_warnings(self) -> None:
+        if self.hasopt("w"):
+            all_warnings: Optional[List[WarningReport]] = self.stats.get("warnings")
+            if not all_warnings:
+                return
+
+            final = self._already_displayed_warnings is not None
+            if final:
+                warning_reports = all_warnings[self._already_displayed_warnings :]
+            else:
+                warning_reports = all_warnings
+            self._already_displayed_warnings = len(warning_reports)
+            if not warning_reports:
+                return
+
+            reports_grouped_by_message: Dict[str, List[WarningReport]] = {}
+            for wr in warning_reports:
+                reports_grouped_by_message.setdefault(wr.message, []).append(wr)
+
+            def collapsed_location_report(reports: List[WarningReport]) -> str:
+                locations = []
+                for w in reports:
+                    location = w.get_location(self.config)
+                    if location:
+                        locations.append(location)
+
+                if len(locations) < 10:
+                    return "\n".join(map(str, locations))
+
+                counts_by_filename = Counter(
+                    str(loc).split("::", 1)[0] for loc in locations
+                )
+                return "\n".join(
+                    "{}: {} warning{}".format(k, v, "s" if v > 1 else "")
+                    for k, v in counts_by_filename.items()
+                )
+
+            title = "warnings summary (final)" if final else "warnings summary"
+            self.write_sep("=", title, yellow=True, bold=False)
+            for message, message_reports in reports_grouped_by_message.items():
+                maybe_location = collapsed_location_report(message_reports)
+                if maybe_location:
+                    self._tw.line(maybe_location)
+                    lines = message.splitlines()
+                    indented = "\n".join("  " + x for x in lines)
+                    message = indented.rstrip()
+                else:
+                    message = message.rstrip()
+                self._tw.line(message)
+                self._tw.line()
+            self._tw.line(
+                "-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html"
+            )
+
+    def summary_passes(self) -> None:
+        if self.config.option.tbstyle != "no":
+            if self.hasopt("P"):
+                reports: List[TestReport] = self.getreports("passed")
+                if not reports:
+                    return
+                self.write_sep("=", "PASSES")
+                for rep in reports:
+                    if rep.sections:
+                        msg = self._getfailureheadline(rep)
+                        self.write_sep("_", msg, green=True, bold=True)
+                        self._outrep_summary(rep)
+                    self._handle_teardown_sections(rep.nodeid)
+
+    def _get_teardown_reports(self, nodeid: str) -> List[TestReport]:
+        reports = self.getreports("")
+        return [
+            report
+            for report in reports
+            if report.when == "teardown" and report.nodeid == nodeid
+        ]
+
+    def _handle_teardown_sections(self, nodeid: str) -> None:
+        for report in self._get_teardown_reports(nodeid):
+            self.print_teardown_sections(report)
+
+    def print_teardown_sections(self, rep: TestReport) -> None:
+        showcapture = self.config.option.showcapture
+        if showcapture == "no":
+            return
+        for secname, content in rep.sections:
+            if showcapture != "all" and showcapture not in secname:
+                continue
+            if "teardown" in secname:
+                self._tw.sep("-", secname)
+                if content[-1:] == "\n":
+                    content = content[:-1]
+                self._tw.line(content)
+
+    def summary_failures(self) -> None:
+        if self.config.option.tbstyle != "no":
+            reports: List[BaseReport] = self.getreports("failed")
+            if not reports:
+                return
+            self.write_sep("=", "FAILURES")
+            if self.config.option.tbstyle == "line":
+                for rep in reports:
+                    line = self._getcrashline(rep)
+                    self.write_line(line)
+            else:
+                for rep in reports:
+                    msg = self._getfailureheadline(rep)
+                    self.write_sep("_", msg, red=True, bold=True)
+                    self._outrep_summary(rep)
+                    self._handle_teardown_sections(rep.nodeid)
+
+    def summary_errors(self) -> None:
+        if self.config.option.tbstyle != "no":
+            reports: List[BaseReport] = self.getreports("error")
+            if not reports:
+                return
+            self.write_sep("=", "ERRORS")
+            for rep in self.stats["error"]:
+                msg = self._getfailureheadline(rep)
+                if rep.when == "collect":
+                    msg = "ERROR collecting " + msg
+                else:
+                    msg = f"ERROR at {rep.when} of {msg}"
+                self.write_sep("_", msg, red=True, bold=True)
+                self._outrep_summary(rep)
+
+    def _outrep_summary(self, rep: BaseReport) -> None:
+        rep.toterminal(self._tw)
+        showcapture = self.config.option.showcapture
+        if showcapture == "no":
+            return
+        for secname, content in rep.sections:
+            if showcapture != "all" and showcapture not in secname:
+                continue
+            self._tw.sep("-", secname)
+            if content[-1:] == "\n":
+                content = content[:-1]
+            self._tw.line(content)
+
+    def summary_stats(self) -> None:
+        if self.verbosity < -1:
+            return
+
+        session_duration = timing.time() - self._sessionstarttime
+        (parts, main_color) = self.build_summary_stats_line()
+        line_parts = []
+
+        display_sep = self.verbosity >= 0
+        if display_sep:
+            fullwidth = self._tw.fullwidth
+        for text, markup in parts:
+            with_markup = self._tw.markup(text, **markup)
+            if display_sep:
+                fullwidth += len(with_markup) - len(text)
+            line_parts.append(with_markup)
+        msg = ", ".join(line_parts)
+
+        main_markup = {main_color: True}
+        duration = f" in {format_session_duration(session_duration)}"
+        duration_with_markup = self._tw.markup(duration, **main_markup)
+        if display_sep:
+            fullwidth += len(duration_with_markup) - len(duration)
+        msg += duration_with_markup
+
+        if display_sep:
+            markup_for_end_sep = self._tw.markup("", **main_markup)
+            if markup_for_end_sep.endswith("\x1b[0m"):
+                markup_for_end_sep = markup_for_end_sep[:-4]
+            fullwidth += len(markup_for_end_sep)
+            msg += markup_for_end_sep
+
+        if display_sep:
+            self.write_sep("=", msg, fullwidth=fullwidth, **main_markup)
+        else:
+            self.write_line(msg, **main_markup)
+
+    def short_test_summary(self) -> None:
+        if not self.reportchars:
+            return
+
+        def show_simple(lines: List[str], *, stat: str) -> None:
+            failed = self.stats.get(stat, [])
+            if not failed:
+                return
+            config = self.config
+            for rep in failed:
+                color = _color_for_type.get(stat, _color_for_type_default)
+                line = _get_line_with_reprcrash_message(
+                    config, rep, self._tw, {color: True}
+                )
+                lines.append(line)
+
+        def show_xfailed(lines: List[str]) -> None:
+            xfailed = self.stats.get("xfailed", [])
+            for rep in xfailed:
+                verbose_word = rep._get_verbose_word(self.config)
+                markup_word = self._tw.markup(
+                    verbose_word, **{_color_for_type["warnings"]: True}
+                )
+                nodeid = _get_node_id_with_markup(self._tw, self.config, rep)
+                line = f"{markup_word} {nodeid}"
+                reason = rep.wasxfail
+                if reason:
+                    line += " - " + str(reason)
+
+                lines.append(line)
+
+        def show_xpassed(lines: List[str]) -> None:
+            xpassed = self.stats.get("xpassed", [])
+            for rep in xpassed:
+                verbose_word = rep._get_verbose_word(self.config)
+                markup_word = self._tw.markup(
+                    verbose_word, **{_color_for_type["warnings"]: True}
+                )
+                nodeid = _get_node_id_with_markup(self._tw, self.config, rep)
+                reason = rep.wasxfail
+                lines.append(f"{markup_word} {nodeid} {reason}")
+
+        def show_skipped(lines: List[str]) -> None:
+            skipped: List[CollectReport] = self.stats.get("skipped", [])
+            fskips = _folded_skips(self.startpath, skipped) if skipped else []
+            if not fskips:
+                return
+            verbose_word = skipped[0]._get_verbose_word(self.config)
+            markup_word = self._tw.markup(
+                verbose_word, **{_color_for_type["warnings"]: True}
+            )
+            prefix = "Skipped: "
+            for num, fspath, lineno, reason in fskips:
+                if reason.startswith(prefix):
+                    reason = reason[len(prefix) :]
+                if lineno is not None:
+                    lines.append(
+                        "%s [%d] %s:%d: %s" % (markup_word, num, fspath, lineno, reason)
+                    )
+                else:
+                    lines.append("%s [%d] %s: %s" % (markup_word, num, fspath, reason))
+
+        REPORTCHAR_ACTIONS: Mapping[str, Callable[[List[str]], None]] = {
+            "x": show_xfailed,
+            "X": show_xpassed,
+            "f": partial(show_simple, stat="failed"),
+            "s": show_skipped,
+            "p": partial(show_simple, stat="passed"),
+            "E": partial(show_simple, stat="error"),
+        }
+
+        lines: List[str] = []
+        for char in self.reportchars:
+            action = REPORTCHAR_ACTIONS.get(char)
+            if action:  # skipping e.g. "P" (passed with output) here.
+                action(lines)
+
+        if lines:
+            self.write_sep("=", "short test summary info", cyan=True, bold=True)
+            for line in lines:
+                self.write_line(line)
+
+    def _get_main_color(self) -> Tuple[str, List[str]]:
+        if self._main_color is None or self._known_types is None or self._is_last_item:
+            self._set_main_color()
+            assert self._main_color
+            assert self._known_types
+        return self._main_color, self._known_types
+
+    def _determine_main_color(self, unknown_type_seen: bool) -> str:
+        stats = self.stats
+        if "failed" in stats or "error" in stats:
+            main_color = "red"
+        elif "warnings" in stats or "xpassed" in stats or unknown_type_seen:
+            main_color = "yellow"
+        elif "passed" in stats or not self._is_last_item:
+            main_color = "green"
+        else:
+            main_color = "yellow"
+        return main_color
+
+    def _set_main_color(self) -> None:
+        unknown_types: List[str] = []
+        for found_type in self.stats.keys():
+            if found_type:  # setup/teardown reports have an empty key, ignore them
+                if found_type not in KNOWN_TYPES and found_type not in unknown_types:
+                    unknown_types.append(found_type)
+        self._known_types = list(KNOWN_TYPES) + unknown_types
+        self._main_color = self._determine_main_color(bool(unknown_types))
+
+    def build_summary_stats_line(self) -> Tuple[List[Tuple[str, Dict[str, bool]]], str]:
+        """
+        Build the parts used in the last summary stats line.
+
+        The summary stats line is the line shown at the end, "=== 12 passed, 2 errors in Xs===".
+
+        This function builds a list of the "parts" that make up for the text in that line, in
+        the example above it would be:
+
+            [
+                ("12 passed", {"green": True}),
+                ("2 errors", {"red": True}
+            ]
+
+        That last dict for each line is a "markup dictionary", used by TerminalWriter to
+        color output.
+
+        The final color of the line is also determined by this function, and is the second
+        element of the returned tuple.
+        """
+        if self.config.getoption("collectonly"):
+            return self._build_collect_only_summary_stats_line()
+        else:
+            return self._build_normal_summary_stats_line()
+
+    def _get_reports_to_display(self, key: str) -> List[Any]:
+        """Get test/collection reports for the given status key, such as `passed` or `error`."""
+        reports = self.stats.get(key, [])
+        return [x for x in reports if getattr(x, "count_towards_summary", True)]
+
+    def _build_normal_summary_stats_line(
+        self,
+    ) -> Tuple[List[Tuple[str, Dict[str, bool]]], str]:
+        main_color, known_types = self._get_main_color()
+        parts = []
+
+        for key in known_types:
+            reports = self._get_reports_to_display(key)
+            if reports:
+                count = len(reports)
+                color = _color_for_type.get(key, _color_for_type_default)
+                markup = {color: True, "bold": color == main_color}
+                parts.append(("%d %s" % pluralize(count, key), markup))
+
+        if not parts:
+            parts = [("no tests ran", {_color_for_type_default: True})]
+
+        return parts, main_color
+
+    def _build_collect_only_summary_stats_line(
+        self,
+    ) -> Tuple[List[Tuple[str, Dict[str, bool]]], str]:
+        deselected = len(self._get_reports_to_display("deselected"))
+        errors = len(self._get_reports_to_display("error"))
+
+        if self._numcollected == 0:
+            parts = [("no tests collected", {"yellow": True})]
+            main_color = "yellow"
+
+        elif deselected == 0:
+            main_color = "green"
+            collected_output = "%d %s collected" % pluralize(self._numcollected, "test")
+            parts = [(collected_output, {main_color: True})]
+        else:
+            all_tests_were_deselected = self._numcollected == deselected
+            if all_tests_were_deselected:
+                main_color = "yellow"
+                collected_output = f"no tests collected ({deselected} deselected)"
+            else:
+                main_color = "green"
+                selected = self._numcollected - deselected
+                collected_output = f"{selected}/{self._numcollected} tests collected ({deselected} deselected)"
+
+            parts = [(collected_output, {main_color: True})]
+
+        if errors:
+            main_color = _color_for_type["error"]
+            parts += [("%d %s" % pluralize(errors, "error"), {main_color: True})]
+
+        return parts, main_color
+
+
+def _get_node_id_with_markup(tw: TerminalWriter, config: Config, rep: BaseReport):
+    nodeid = config.cwd_relative_nodeid(rep.nodeid)
+    path, *parts = nodeid.split("::")
+    if parts:
+        parts_markup = tw.markup("::".join(parts), bold=True)
+        return path + "::" + parts_markup
+    else:
+        return path
+
+
+def _format_trimmed(format: str, msg: str, available_width: int) -> Optional[str]:
+    """Format msg into format, ellipsizing it if doesn't fit in available_width.
+
+    Returns None if even the ellipsis can't fit.
+    """
+    # Only use the first line.
+    i = msg.find("\n")
+    if i != -1:
+        msg = msg[:i]
+
+    ellipsis = "..."
+    format_width = wcswidth(format.format(""))
+    if format_width + len(ellipsis) > available_width:
+        return None
+
+    if format_width + wcswidth(msg) > available_width:
+        available_width -= len(ellipsis)
+        msg = msg[:available_width]
+        while format_width + wcswidth(msg) > available_width:
+            msg = msg[:-1]
+        msg += ellipsis
+
+    return format.format(msg)
+
+
+def _get_line_with_reprcrash_message(
+    config: Config, rep: BaseReport, tw: TerminalWriter, word_markup: Dict[str, bool]
+) -> str:
+    """Get summary line for a report, trying to add reprcrash message."""
+    verbose_word = rep._get_verbose_word(config)
+    word = tw.markup(verbose_word, **word_markup)
+    node = _get_node_id_with_markup(tw, config, rep)
+
+    line = f"{word} {node}"
+    line_width = wcswidth(line)
+
+    try:
+        # Type ignored intentionally -- possible AttributeError expected.
+        msg = rep.longrepr.reprcrash.message  # type: ignore[union-attr]
+    except AttributeError:
+        pass
+    else:
+        if not running_on_ci():
+            available_width = tw.fullwidth - line_width
+            msg = _format_trimmed(" - {}", msg, available_width)
+        else:
+            msg = f" - {msg}"
+        if msg is not None:
+            line += msg
+
+    return line
+
+
+def _folded_skips(
+    startpath: Path,
+    skipped: Sequence[CollectReport],
+) -> List[Tuple[int, str, Optional[int], str]]:
+    d: Dict[Tuple[str, Optional[int], str], List[CollectReport]] = {}
+    for event in skipped:
+        assert event.longrepr is not None
+        assert isinstance(event.longrepr, tuple), (event, event.longrepr)
+        assert len(event.longrepr) == 3, (event, event.longrepr)
+        fspath, lineno, reason = event.longrepr
+        # For consistency, report all fspaths in relative form.
+        fspath = bestrelpath(startpath, Path(fspath))
+        keywords = getattr(event, "keywords", {})
+        # Folding reports with global pytestmark variable.
+        # This is a workaround, because for now we cannot identify the scope of a skip marker
+        # TODO: Revisit after marks scope would be fixed.
+        if (
+            event.when == "setup"
+            and "skip" in keywords
+            and "pytestmark" not in keywords
+        ):
+            key: Tuple[str, Optional[int], str] = (fspath, None, reason)
+        else:
+            key = (fspath, lineno, reason)
+        d.setdefault(key, []).append(event)
+    values: List[Tuple[int, str, Optional[int], str]] = []
+    for key, events in d.items():
+        values.append((len(events), *key))
+    return values
+
+
+_color_for_type = {
+    "failed": "red",
+    "error": "red",
+    "warnings": "yellow",
+    "passed": "green",
+}
+_color_for_type_default = "yellow"
+
+
+def pluralize(count: int, noun: str) -> Tuple[int, str]:
+    # No need to pluralize words such as `failed` or `passed`.
+    if noun not in ["error", "warnings", "test"]:
+        return count, noun
+
+    # The `warnings` key is plural. To avoid API breakage, we keep it that way but
+    # set it to singular here so we can determine plurality in the same way as we do
+    # for `error`.
+    noun = noun.replace("warnings", "warning")
+
+    return count, noun + "s" if count != 1 else noun
+
+
+def _plugin_nameversions(plugininfo) -> List[str]:
+    values: List[str] = []
+    for plugin, dist in plugininfo:
+        # Gets us name and version!
+        name = "{dist.project_name}-{dist.version}".format(dist=dist)
+        # Questionable convenience, but it keeps things short.
+        if name.startswith("pytest-"):
+            name = name[7:]
+        # We decided to print python package names they can have more than one plugin.
+        if name not in values:
+            values.append(name)
+    return values
+
+
+def format_session_duration(seconds: float) -> str:
+    """Format the given seconds in a human readable manner to show in the final summary."""
+    if seconds < 60:
+        return f"{seconds:.2f}s"
+    else:
+        dt = datetime.timedelta(seconds=int(seconds))
+        return f"{seconds:.2f}s ({dt})"
+
+
+def _get_raw_skip_reason(report: TestReport) -> str:
+    """Get the reason string of a skip/xfail/xpass test report.
+
+    The string is just the part given by the user.
+    """
+    if hasattr(report, "wasxfail"):
+        reason = cast(str, report.wasxfail)
+        if reason.startswith("reason: "):
+            reason = reason[len("reason: ") :]
+        return reason
+    else:
+        assert report.skipped
+        assert isinstance(report.longrepr, tuple)
+        _, _, reason = report.longrepr
+        if reason.startswith("Skipped: "):
+            reason = reason[len("Skipped: ") :]
+        elif reason == "Skipped":
+            reason = ""
+        return reason
diff --git a/contrib/python/pytest/py3/_pytest/threadexception.py b/contrib/python/pytest/py3/_pytest/threadexception.py
new file mode 100644
index 0000000000..43341e739a
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/threadexception.py
@@ -0,0 +1,88 @@
+import threading
+import traceback
+import warnings
+from types import TracebackType
+from typing import Any
+from typing import Callable
+from typing import Generator
+from typing import Optional
+from typing import Type
+
+import pytest
+
+
+# Copied from cpython/Lib/test/support/threading_helper.py, with modifications.
+class catch_threading_exception:
+    """Context manager catching threading.Thread exception using
+    threading.excepthook.
+
+    Storing exc_value using a custom hook can create a reference cycle. The
+    reference cycle is broken explicitly when the context manager exits.
+
+    Storing thread using a custom hook can resurrect it if it is set to an
+    object which is being finalized. Exiting the context manager clears the
+    stored object.
+
+    Usage:
+        with threading_helper.catch_threading_exception() as cm:
+            # code spawning a thread which raises an exception
+            ...
+            # check the thread exception: use cm.args
+            ...
+        # cm.args attribute no longer exists at this point
+        # (to break a reference cycle)
+    """
+
+    def __init__(self) -> None:
+        self.args: Optional["threading.ExceptHookArgs"] = None
+        self._old_hook: Optional[Callable[["threading.ExceptHookArgs"], Any]] = None
+
+    def _hook(self, args: "threading.ExceptHookArgs") -> None:
+        self.args = args
+
+    def __enter__(self) -> "catch_threading_exception":
+        self._old_hook = threading.excepthook
+        threading.excepthook = self._hook
+        return self
+
+    def __exit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        exc_tb: Optional[TracebackType],
+    ) -> None:
+        assert self._old_hook is not None
+        threading.excepthook = self._old_hook
+        self._old_hook = None
+        del self.args
+
+
+def thread_exception_runtest_hook() -> Generator[None, None, None]:
+    with catch_threading_exception() as cm:
+        yield
+        if cm.args:
+            thread_name = "<unknown>" if cm.args.thread is None else cm.args.thread.name
+            msg = f"Exception in thread {thread_name}\n\n"
+            msg += "".join(
+                traceback.format_exception(
+                    cm.args.exc_type,
+                    cm.args.exc_value,
+                    cm.args.exc_traceback,
+                )
+            )
+            warnings.warn(pytest.PytestUnhandledThreadExceptionWarning(msg))
+
+
+@pytest.hookimpl(hookwrapper=True, trylast=True)
+def pytest_runtest_setup() -> Generator[None, None, None]:
+    yield from thread_exception_runtest_hook()
+
+
+@pytest.hookimpl(hookwrapper=True, tryfirst=True)
+def pytest_runtest_call() -> Generator[None, None, None]:
+    yield from thread_exception_runtest_hook()
+
+
+@pytest.hookimpl(hookwrapper=True, tryfirst=True)
+def pytest_runtest_teardown() -> Generator[None, None, None]:
+    yield from thread_exception_runtest_hook()
diff --git a/contrib/python/pytest/py3/_pytest/timing.py b/contrib/python/pytest/py3/_pytest/timing.py
new file mode 100644
index 0000000000..925163a585
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/timing.py
@@ -0,0 +1,12 @@
+"""Indirection for time functions.
+
+We intentionally grab some "time" functions internally to avoid tests mocking "time" to affect
+pytest runtime information (issue #185).
+
+Fixture "mock_timing" also interacts with this module for pytest's own tests.
+"""
+from time import perf_counter
+from time import sleep
+from time import time
+
+__all__ = ["perf_counter", "sleep", "time"]
diff --git a/contrib/python/pytest/py3/_pytest/tmpdir.py b/contrib/python/pytest/py3/_pytest/tmpdir.py
new file mode 100644
index 0000000000..3cc2bace55
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/tmpdir.py
@@ -0,0 +1,324 @@
+"""Support for providing temporary directories to test functions."""
+import dataclasses
+import os
+import re
+import tempfile
+from pathlib import Path
+from shutil import rmtree
+from typing import Any
+from typing import Dict
+from typing import Generator
+from typing import Optional
+from typing import TYPE_CHECKING
+from typing import Union
+
+from _pytest.nodes import Item
+from _pytest.reports import CollectReport
+from _pytest.stash import StashKey
+
+if TYPE_CHECKING:
+    from typing_extensions import Literal
+
+    RetentionType = Literal["all", "failed", "none"]
+
+
+from _pytest.config.argparsing import Parser
+
+from .pathlib import LOCK_TIMEOUT
+from .pathlib import make_numbered_dir
+from .pathlib import make_numbered_dir_with_cleanup
+from .pathlib import rm_rf
+from .pathlib import cleanup_dead_symlinks
+from _pytest.compat import final, get_user_id
+from _pytest.config import Config
+from _pytest.config import ExitCode
+from _pytest.config import hookimpl
+from _pytest.deprecated import check_ispytest
+from _pytest.fixtures import fixture
+from _pytest.fixtures import FixtureRequest
+from _pytest.monkeypatch import MonkeyPatch
+
+tmppath_result_key = StashKey[Dict[str, bool]]()
+
+
+@final
+@dataclasses.dataclass
+class TempPathFactory:
+    """Factory for temporary directories under the common base temp directory.
+
+    The base directory can be configured using the ``--basetemp`` option.
+    """
+
+    _given_basetemp: Optional[Path]
+    # pluggy TagTracerSub, not currently exposed, so Any.
+    _trace: Any
+    _basetemp: Optional[Path]
+    _retention_count: int
+    _retention_policy: "RetentionType"
+
+    def __init__(
+        self,
+        given_basetemp: Optional[Path],
+        retention_count: int,
+        retention_policy: "RetentionType",
+        trace,
+        basetemp: Optional[Path] = None,
+        *,
+        _ispytest: bool = False,
+    ) -> None:
+        check_ispytest(_ispytest)
+        if given_basetemp is None:
+            self._given_basetemp = None
+        else:
+            # Use os.path.abspath() to get absolute path instead of resolve() as it
+            # does not work the same in all platforms (see #4427).
+            # Path.absolute() exists, but it is not public (see https://bugs.python.org/issue25012).
+            self._given_basetemp = Path(os.path.abspath(str(given_basetemp)))
+        self._trace = trace
+        self._retention_count = retention_count
+        self._retention_policy = retention_policy
+        self._basetemp = basetemp
+
+    @classmethod
+    def from_config(
+        cls,
+        config: Config,
+        *,
+        _ispytest: bool = False,
+    ) -> "TempPathFactory":
+        """Create a factory according to pytest configuration.
+
+        :meta private:
+        """
+        check_ispytest(_ispytest)
+        count = int(config.getini("tmp_path_retention_count"))
+        if count < 0:
+            raise ValueError(
+                f"tmp_path_retention_count must be >= 0. Current input: {count}."
+            )
+
+        policy = config.getini("tmp_path_retention_policy")
+        if policy not in ("all", "failed", "none"):
+            raise ValueError(
+                f"tmp_path_retention_policy must be either all, failed, none. Current input: {policy}."
+            )
+
+        return cls(
+            given_basetemp=config.option.basetemp,
+            trace=config.trace.get("tmpdir"),
+            retention_count=count,
+            retention_policy=policy,
+            _ispytest=True,
+        )
+
+    def _ensure_relative_to_basetemp(self, basename: str) -> str:
+        basename = os.path.normpath(basename)
+        if (self.getbasetemp() / basename).resolve().parent != self.getbasetemp():
+            raise ValueError(f"{basename} is not a normalized and relative path")
+        return basename
+
+    def mktemp(self, basename: str, numbered: bool = True) -> Path:
+        """Create a new temporary directory managed by the factory.
+
+        :param basename:
+            Directory base name, must be a relative path.
+
+        :param numbered:
+            If ``True``, ensure the directory is unique by adding a numbered
+            suffix greater than any existing one: ``basename="foo-"`` and ``numbered=True``
+            means that this function will create directories named ``"foo-0"``,
+            ``"foo-1"``, ``"foo-2"`` and so on.
+
+        :returns:
+            The path to the new directory.
+        """
+        basename = self._ensure_relative_to_basetemp(basename)
+        if not numbered:
+            p = self.getbasetemp().joinpath(basename)
+            p.mkdir(mode=0o700)
+        else:
+            p = make_numbered_dir(root=self.getbasetemp(), prefix=basename, mode=0o700)
+            self._trace("mktemp", p)
+        return p
+
+    def getbasetemp(self) -> Path:
+        """Return the base temporary directory, creating it if needed.
+
+        :returns:
+            The base temporary directory.
+        """
+        if self._basetemp is not None:
+            return self._basetemp
+
+        if self._given_basetemp is not None:
+            basetemp = self._given_basetemp
+            if basetemp.exists():
+                rm_rf(basetemp)
+            basetemp.mkdir(mode=0o700)
+            basetemp = basetemp.resolve()
+        else:
+            from_env = os.environ.get("PYTEST_DEBUG_TEMPROOT")
+            temproot = Path(from_env or tempfile.gettempdir()).resolve()
+            user = get_user() or "unknown"
+            # use a sub-directory in the temproot to speed-up
+            # make_numbered_dir() call
+            rootdir = temproot.joinpath(f"pytest-of-{user}")
+            try:
+                rootdir.mkdir(mode=0o700, exist_ok=True)
+            except OSError:
+                # getuser() likely returned illegal characters for the platform, use unknown back off mechanism
+                rootdir = temproot.joinpath("pytest-of-unknown")
+                rootdir.mkdir(mode=0o700, exist_ok=True)
+            # Because we use exist_ok=True with a predictable name, make sure
+            # we are the owners, to prevent any funny business (on unix, where
+            # temproot is usually shared).
+            # Also, to keep things private, fixup any world-readable temp
+            # rootdir's permissions. Historically 0o755 was used, so we can't
+            # just error out on this, at least for a while.
+            uid = get_user_id()
+            if uid is not None:
+                rootdir_stat = rootdir.stat()
+                if rootdir_stat.st_uid != uid:
+                    raise OSError(
+                        f"The temporary directory {rootdir} is not owned by the current user. "
+                        "Fix this and try again."
+                    )
+                if (rootdir_stat.st_mode & 0o077) != 0:
+                    os.chmod(rootdir, rootdir_stat.st_mode & ~0o077)
+            keep = self._retention_count
+            if self._retention_policy == "none":
+                keep = 0
+            basetemp = make_numbered_dir_with_cleanup(
+                prefix="pytest-",
+                root=rootdir,
+                keep=keep,
+                lock_timeout=LOCK_TIMEOUT,
+                mode=0o700,
+            )
+        assert basetemp is not None, basetemp
+        self._basetemp = basetemp
+        self._trace("new basetemp", basetemp)
+        return basetemp
+
+
+def get_user() -> Optional[str]:
+    """Return the current user name, or None if getuser() does not work
+    in the current environment (see #1010)."""
+    try:
+        # In some exotic environments, getpass may not be importable.
+        import getpass
+
+        return getpass.getuser()
+    except (ImportError, KeyError):
+        return None
+
+
+def pytest_configure(config: Config) -> None:
+    """Create a TempPathFactory and attach it to the config object.
+
+    This is to comply with existing plugins which expect the handler to be
+    available at pytest_configure time, but ideally should be moved entirely
+    to the tmp_path_factory session fixture.
+    """
+    mp = MonkeyPatch()
+    config.add_cleanup(mp.undo)
+    _tmp_path_factory = TempPathFactory.from_config(config, _ispytest=True)
+    mp.setattr(config, "_tmp_path_factory", _tmp_path_factory, raising=False)
+
+
+def pytest_addoption(parser: Parser) -> None:
+    parser.addini(
+        "tmp_path_retention_count",
+        help="How many sessions should we keep the `tmp_path` directories, according to `tmp_path_retention_policy`.",
+        default=3,
+    )
+
+    parser.addini(
+        "tmp_path_retention_policy",
+        help="Controls which directories created by the `tmp_path` fixture are kept around, based on test outcome. "
+        "(all/failed/none)",
+        default="all",
+    )
+
+
+@fixture(scope="session")
+def tmp_path_factory(request: FixtureRequest) -> TempPathFactory:
+    """Return a :class:`pytest.TempPathFactory` instance for the test session."""
+    # Set dynamically by pytest_configure() above.
+    return request.config._tmp_path_factory  # type: ignore
+
+
+def _mk_tmp(request: FixtureRequest, factory: TempPathFactory) -> Path:
+    name = request.node.name
+    name = re.sub(r"[\W]", "_", name)
+    MAXVAL = 30
+    name = name[:MAXVAL]
+    return factory.mktemp(name, numbered=True)
+
+
+@fixture
+def tmp_path(
+    request: FixtureRequest, tmp_path_factory: TempPathFactory
+) -> Generator[Path, None, None]:
+    """Return a temporary directory path object which is unique to each test
+    function invocation, created as a sub directory of the base temporary
+    directory.
+
+    By default, a new base temporary directory is created each test session,
+    and old bases are removed after 3 sessions, to aid in debugging.
+    This behavior can be configured with :confval:`tmp_path_retention_count` and
+    :confval:`tmp_path_retention_policy`.
+    If ``--basetemp`` is used then it is cleared each session. See :ref:`base
+    temporary directory`.
+
+    The returned object is a :class:`pathlib.Path` object.
+    """
+
+    path = _mk_tmp(request, tmp_path_factory)
+    yield path
+
+    # Remove the tmpdir if the policy is "failed" and the test passed.
+    tmp_path_factory: TempPathFactory = request.session.config._tmp_path_factory  # type: ignore
+    policy = tmp_path_factory._retention_policy
+    result_dict = request.node.stash[tmppath_result_key]
+
+    if policy == "failed" and result_dict.get("call", True):
+        # We do a "best effort" to remove files, but it might not be possible due to some leaked resource,
+        # permissions, etc, in which case we ignore it.
+        rmtree(path, ignore_errors=True)
+
+    del request.node.stash[tmppath_result_key]
+
+
+def pytest_sessionfinish(session, exitstatus: Union[int, ExitCode]):
+    """After each session, remove base directory if all the tests passed,
+    the policy is "failed", and the basetemp is not specified by a user.
+    """
+    tmp_path_factory: TempPathFactory = session.config._tmp_path_factory
+    basetemp = tmp_path_factory._basetemp
+    if basetemp is None:
+        return
+
+    policy = tmp_path_factory._retention_policy
+    if (
+        exitstatus == 0
+        and policy == "failed"
+        and tmp_path_factory._given_basetemp is None
+    ):
+        if basetemp.is_dir():
+            # We do a "best effort" to remove files, but it might not be possible due to some leaked resource,
+            # permissions, etc, in which case we ignore it.
+            rmtree(basetemp, ignore_errors=True)
+
+    # Remove dead symlinks.
+    if basetemp.is_dir():
+        cleanup_dead_symlinks(basetemp)
+
+
+@hookimpl(tryfirst=True, hookwrapper=True)
+def pytest_runtest_makereport(item: Item, call):
+    outcome = yield
+    result: CollectReport = outcome.get_result()
+
+    empty: Dict[str, bool] = {}
+    item.stash.setdefault(tmppath_result_key, empty)[result.when] = result.passed
diff --git a/contrib/python/pytest/py3/_pytest/unittest.py b/contrib/python/pytest/py3/_pytest/unittest.py
new file mode 100644
index 0000000000..d42a12a3a9
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/unittest.py
@@ -0,0 +1,421 @@
+"""Discover and run std-library "unittest" style tests."""
+import sys
+import traceback
+import types
+from typing import Any
+from typing import Callable
+from typing import Generator
+from typing import Iterable
+from typing import List
+from typing import Optional
+from typing import Tuple
+from typing import Type
+from typing import TYPE_CHECKING
+from typing import Union
+
+import _pytest._code
+import pytest
+from _pytest.compat import getimfunc
+from _pytest.compat import is_async_function
+from _pytest.config import hookimpl
+from _pytest.fixtures import FixtureRequest
+from _pytest.nodes import Collector
+from _pytest.nodes import Item
+from _pytest.outcomes import exit
+from _pytest.outcomes import fail
+from _pytest.outcomes import skip
+from _pytest.outcomes import xfail
+from _pytest.python import Class
+from _pytest.python import Function
+from _pytest.python import Module
+from _pytest.runner import CallInfo
+from _pytest.scope import Scope
+
+if TYPE_CHECKING:
+    import unittest
+    import twisted.trial.unittest
+
+    _SysExcInfoType = Union[
+        Tuple[Type[BaseException], BaseException, types.TracebackType],
+        Tuple[None, None, None],
+    ]
+
+
+def pytest_pycollect_makeitem(
+    collector: Union[Module, Class], name: str, obj: object
+) -> Optional["UnitTestCase"]:
+    # Has unittest been imported and is obj a subclass of its TestCase?
+    try:
+        ut = sys.modules["unittest"]
+        # Type ignored because `ut` is an opaque module.
+        if not issubclass(obj, ut.TestCase):  # type: ignore
+            return None
+    except Exception:
+        return None
+    # Yes, so let's collect it.
+    item: UnitTestCase = UnitTestCase.from_parent(collector, name=name, obj=obj)
+    return item
+
+
+class UnitTestCase(Class):
+    # Marker for fixturemanger.getfixtureinfo()
+    # to declare that our children do not support funcargs.
+    nofuncargs = True
+
+    def collect(self) -> Iterable[Union[Item, Collector]]:
+        from unittest import TestLoader
+
+        cls = self.obj
+        if not getattr(cls, "__test__", True):
+            return
+
+        skipped = _is_skipped(cls)
+        if not skipped:
+            self._inject_setup_teardown_fixtures(cls)
+            self._inject_setup_class_fixture()
+
+        self.session._fixturemanager.parsefactories(self, unittest=True)
+        loader = TestLoader()
+        foundsomething = False
+        for name in loader.getTestCaseNames(self.obj):
+            x = getattr(self.obj, name)
+            if not getattr(x, "__test__", True):
+                continue
+            funcobj = getimfunc(x)
+            yield TestCaseFunction.from_parent(self, name=name, callobj=funcobj)
+            foundsomething = True
+
+        if not foundsomething:
+            runtest = getattr(self.obj, "runTest", None)
+            if runtest is not None:
+                ut = sys.modules.get("twisted.trial.unittest", None)
+                # Type ignored because `ut` is an opaque module.
+                if ut is None or runtest != ut.TestCase.runTest:  # type: ignore
+                    yield TestCaseFunction.from_parent(self, name="runTest")
+
+    def _inject_setup_teardown_fixtures(self, cls: type) -> None:
+        """Injects a hidden auto-use fixture to invoke setUpClass/setup_method and corresponding
+        teardown functions (#517)."""
+        class_fixture = _make_xunit_fixture(
+            cls,
+            "setUpClass",
+            "tearDownClass",
+            "doClassCleanups",
+            scope=Scope.Class,
+            pass_self=False,
+        )
+        if class_fixture:
+            cls.__pytest_class_setup = class_fixture  # type: ignore[attr-defined]
+
+        method_fixture = _make_xunit_fixture(
+            cls,
+            "setup_method",
+            "teardown_method",
+            None,
+            scope=Scope.Function,
+            pass_self=True,
+        )
+        if method_fixture:
+            cls.__pytest_method_setup = method_fixture  # type: ignore[attr-defined]
+
+
+def _make_xunit_fixture(
+    obj: type,
+    setup_name: str,
+    teardown_name: str,
+    cleanup_name: Optional[str],
+    scope: Scope,
+    pass_self: bool,
+):
+    setup = getattr(obj, setup_name, None)
+    teardown = getattr(obj, teardown_name, None)
+    if setup is None and teardown is None:
+        return None
+
+    if cleanup_name:
+        cleanup = getattr(obj, cleanup_name, lambda *args: None)
+    else:
+
+        def cleanup(*args):
+            pass
+
+    @pytest.fixture(
+        scope=scope.value,
+        autouse=True,
+        # Use a unique name to speed up lookup.
+        name=f"_unittest_{setup_name}_fixture_{obj.__qualname__}",
+    )
+    def fixture(self, request: FixtureRequest) -> Generator[None, None, None]:
+        if _is_skipped(self):
+            reason = self.__unittest_skip_why__
+            raise pytest.skip.Exception(reason, _use_item_location=True)
+        if setup is not None:
+            try:
+                if pass_self:
+                    setup(self, request.function)
+                else:
+                    setup()
+            # unittest does not call the cleanup function for every BaseException, so we
+            # follow this here.
+            except Exception:
+                if pass_self:
+                    cleanup(self)
+                else:
+                    cleanup()
+
+                raise
+        yield
+        try:
+            if teardown is not None:
+                if pass_self:
+                    teardown(self, request.function)
+                else:
+                    teardown()
+        finally:
+            if pass_self:
+                cleanup(self)
+            else:
+                cleanup()
+
+    return fixture
+
+
+class TestCaseFunction(Function):
+    nofuncargs = True
+    _excinfo: Optional[List[_pytest._code.ExceptionInfo[BaseException]]] = None
+    _testcase: Optional["unittest.TestCase"] = None
+
+    def _getobj(self):
+        assert self.parent is not None
+        # Unlike a regular Function in a Class, where `item.obj` returns
+        # a *bound* method (attached to an instance), TestCaseFunction's
+        # `obj` returns an *unbound* method (not attached to an instance).
+        # This inconsistency is probably not desirable, but needs some
+        # consideration before changing.
+        return getattr(self.parent.obj, self.originalname)  # type: ignore[attr-defined]
+
+    def setup(self) -> None:
+        # A bound method to be called during teardown() if set (see 'runtest()').
+        self._explicit_tearDown: Optional[Callable[[], None]] = None
+        assert self.parent is not None
+        self._testcase = self.parent.obj(self.name)  # type: ignore[attr-defined]
+        self._obj = getattr(self._testcase, self.name)
+        if hasattr(self, "_request"):
+            self._request._fillfixtures()
+
+    def teardown(self) -> None:
+        if self._explicit_tearDown is not None:
+            self._explicit_tearDown()
+            self._explicit_tearDown = None
+        self._testcase = None
+        self._obj = None
+
+    def startTest(self, testcase: "unittest.TestCase") -> None:
+        pass
+
+    def _addexcinfo(self, rawexcinfo: "_SysExcInfoType") -> None:
+        # Unwrap potential exception info (see twisted trial support below).
+        rawexcinfo = getattr(rawexcinfo, "_rawexcinfo", rawexcinfo)
+        try:
+            excinfo = _pytest._code.ExceptionInfo[BaseException].from_exc_info(rawexcinfo)  # type: ignore[arg-type]
+            # Invoke the attributes to trigger storing the traceback
+            # trial causes some issue there.
+            excinfo.value
+            excinfo.traceback
+        except TypeError:
+            try:
+                try:
+                    values = traceback.format_exception(*rawexcinfo)
+                    values.insert(
+                        0,
+                        "NOTE: Incompatible Exception Representation, "
+                        "displaying natively:\n\n",
+                    )
+                    fail("".join(values), pytrace=False)
+                except (fail.Exception, KeyboardInterrupt):
+                    raise
+                except BaseException:
+                    fail(
+                        "ERROR: Unknown Incompatible Exception "
+                        "representation:\n%r" % (rawexcinfo,),
+                        pytrace=False,
+                    )
+            except KeyboardInterrupt:
+                raise
+            except fail.Exception:
+                excinfo = _pytest._code.ExceptionInfo.from_current()
+        self.__dict__.setdefault("_excinfo", []).append(excinfo)
+
+    def addError(
+        self, testcase: "unittest.TestCase", rawexcinfo: "_SysExcInfoType"
+    ) -> None:
+        try:
+            if isinstance(rawexcinfo[1], exit.Exception):
+                exit(rawexcinfo[1].msg)
+        except TypeError:
+            pass
+        self._addexcinfo(rawexcinfo)
+
+    def addFailure(
+        self, testcase: "unittest.TestCase", rawexcinfo: "_SysExcInfoType"
+    ) -> None:
+        self._addexcinfo(rawexcinfo)
+
+    def addSkip(self, testcase: "unittest.TestCase", reason: str) -> None:
+        try:
+            raise pytest.skip.Exception(reason, _use_item_location=True)
+        except skip.Exception:
+            self._addexcinfo(sys.exc_info())
+
+    def addExpectedFailure(
+        self,
+        testcase: "unittest.TestCase",
+        rawexcinfo: "_SysExcInfoType",
+        reason: str = "",
+    ) -> None:
+        try:
+            xfail(str(reason))
+        except xfail.Exception:
+            self._addexcinfo(sys.exc_info())
+
+    def addUnexpectedSuccess(
+        self,
+        testcase: "unittest.TestCase",
+        reason: Optional["twisted.trial.unittest.Todo"] = None,
+    ) -> None:
+        msg = "Unexpected success"
+        if reason:
+            msg += f": {reason.reason}"
+        # Preserve unittest behaviour - fail the test. Explicitly not an XPASS.
+        try:
+            fail(msg, pytrace=False)
+        except fail.Exception:
+            self._addexcinfo(sys.exc_info())
+
+    def addSuccess(self, testcase: "unittest.TestCase") -> None:
+        pass
+
+    def stopTest(self, testcase: "unittest.TestCase") -> None:
+        pass
+
+    def addDuration(self, testcase: "unittest.TestCase", elapsed: float) -> None:
+        pass
+
+    def runtest(self) -> None:
+        from _pytest.debugging import maybe_wrap_pytest_function_for_tracing
+
+        assert self._testcase is not None
+
+        maybe_wrap_pytest_function_for_tracing(self)
+
+        # Let the unittest framework handle async functions.
+        if is_async_function(self.obj):
+            # Type ignored because self acts as the TestResult, but is not actually one.
+            self._testcase(result=self)  # type: ignore[arg-type]
+        else:
+            # When --pdb is given, we want to postpone calling tearDown() otherwise
+            # when entering the pdb prompt, tearDown() would have probably cleaned up
+            # instance variables, which makes it difficult to debug.
+            # Arguably we could always postpone tearDown(), but this changes the moment where the
+            # TestCase instance interacts with the results object, so better to only do it
+            # when absolutely needed.
+            # We need to consider if the test itself is skipped, or the whole class.
+            assert isinstance(self.parent, UnitTestCase)
+            skipped = _is_skipped(self.obj) or _is_skipped(self.parent.obj)
+            if self.config.getoption("usepdb") and not skipped:
+                self._explicit_tearDown = self._testcase.tearDown
+                setattr(self._testcase, "tearDown", lambda *args: None)
+
+            # We need to update the actual bound method with self.obj, because
+            # wrap_pytest_function_for_tracing replaces self.obj by a wrapper.
+            setattr(self._testcase, self.name, self.obj)
+            try:
+                self._testcase(result=self)  # type: ignore[arg-type]
+            finally:
+                delattr(self._testcase, self.name)
+
+    def _traceback_filter(
+        self, excinfo: _pytest._code.ExceptionInfo[BaseException]
+    ) -> _pytest._code.Traceback:
+        traceback = super()._traceback_filter(excinfo)
+        ntraceback = traceback.filter(
+            lambda x: not x.frame.f_globals.get("__unittest"),
+        )
+        if not ntraceback:
+            ntraceback = traceback
+        return ntraceback
+
+
+@hookimpl(tryfirst=True)
+def pytest_runtest_makereport(item: Item, call: CallInfo[None]) -> None:
+    if isinstance(item, TestCaseFunction):
+        if item._excinfo:
+            call.excinfo = item._excinfo.pop(0)
+            try:
+                del call.result
+            except AttributeError:
+                pass
+
+    # Convert unittest.SkipTest to pytest.skip.
+    # This is actually only needed for nose, which reuses unittest.SkipTest for
+    # its own nose.SkipTest. For unittest TestCases, SkipTest is already
+    # handled internally, and doesn't reach here.
+    unittest = sys.modules.get("unittest")
+    if (
+        unittest
+        and call.excinfo
+        and isinstance(call.excinfo.value, unittest.SkipTest)  # type: ignore[attr-defined]
+    ):
+        excinfo = call.excinfo
+        call2 = CallInfo[None].from_call(
+            lambda: pytest.skip(str(excinfo.value)), call.when
+        )
+        call.excinfo = call2.excinfo
+
+
+# Twisted trial support.
+
+
+@hookimpl(hookwrapper=True)
+def pytest_runtest_protocol(item: Item) -> Generator[None, None, None]:
+    if isinstance(item, TestCaseFunction) and "twisted.trial.unittest" in sys.modules:
+        ut: Any = sys.modules["twisted.python.failure"]
+        Failure__init__ = ut.Failure.__init__
+        check_testcase_implements_trial_reporter()
+
+        def excstore(
+            self, exc_value=None, exc_type=None, exc_tb=None, captureVars=None
+        ):
+            if exc_value is None:
+                self._rawexcinfo = sys.exc_info()
+            else:
+                if exc_type is None:
+                    exc_type = type(exc_value)
+                self._rawexcinfo = (exc_type, exc_value, exc_tb)
+            try:
+                Failure__init__(
+                    self, exc_value, exc_type, exc_tb, captureVars=captureVars
+                )
+            except TypeError:
+                Failure__init__(self, exc_value, exc_type, exc_tb)
+
+        ut.Failure.__init__ = excstore
+        yield
+        ut.Failure.__init__ = Failure__init__
+    else:
+        yield
+
+
+def check_testcase_implements_trial_reporter(done: List[int] = []) -> None:
+    if done:
+        return
+    from zope.interface import classImplements
+    from twisted.trial.itrial import IReporter
+
+    classImplements(TestCaseFunction, IReporter)
+    done.append(1)
+
+
+def _is_skipped(obj) -> bool:
+    """Return True if the given object has been marked with @unittest.skip."""
+    return bool(getattr(obj, "__unittest_skip__", False))
diff --git a/contrib/python/pytest/py3/_pytest/unraisableexception.py b/contrib/python/pytest/py3/_pytest/unraisableexception.py
new file mode 100644
index 0000000000..fcb5d8237c
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/unraisableexception.py
@@ -0,0 +1,93 @@
+import sys
+import traceback
+import warnings
+from types import TracebackType
+from typing import Any
+from typing import Callable
+from typing import Generator
+from typing import Optional
+from typing import Type
+
+import pytest
+
+
+# Copied from cpython/Lib/test/support/__init__.py, with modifications.
+class catch_unraisable_exception:
+    """Context manager catching unraisable exception using sys.unraisablehook.
+
+    Storing the exception value (cm.unraisable.exc_value) creates a reference
+    cycle. The reference cycle is broken explicitly when the context manager
+    exits.
+
+    Storing the object (cm.unraisable.object) can resurrect it if it is set to
+    an object which is being finalized. Exiting the context manager clears the
+    stored object.
+
+    Usage:
+        with catch_unraisable_exception() as cm:
+            # code creating an "unraisable exception"
+            ...
+            # check the unraisable exception: use cm.unraisable
+            ...
+        # cm.unraisable attribute no longer exists at this point
+        # (to break a reference cycle)
+    """
+
+    def __init__(self) -> None:
+        self.unraisable: Optional["sys.UnraisableHookArgs"] = None
+        self._old_hook: Optional[Callable[["sys.UnraisableHookArgs"], Any]] = None
+
+    def _hook(self, unraisable: "sys.UnraisableHookArgs") -> None:
+        # Storing unraisable.object can resurrect an object which is being
+        # finalized. Storing unraisable.exc_value creates a reference cycle.
+        self.unraisable = unraisable
+
+    def __enter__(self) -> "catch_unraisable_exception":
+        self._old_hook = sys.unraisablehook
+        sys.unraisablehook = self._hook
+        return self
+
+    def __exit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        exc_tb: Optional[TracebackType],
+    ) -> None:
+        assert self._old_hook is not None
+        sys.unraisablehook = self._old_hook
+        self._old_hook = None
+        del self.unraisable
+
+
+def unraisable_exception_runtest_hook() -> Generator[None, None, None]:
+    with catch_unraisable_exception() as cm:
+        yield
+        if cm.unraisable:
+            if cm.unraisable.err_msg is not None:
+                err_msg = cm.unraisable.err_msg
+            else:
+                err_msg = "Exception ignored in"
+            msg = f"{err_msg}: {cm.unraisable.object!r}\n\n"
+            msg += "".join(
+                traceback.format_exception(
+                    cm.unraisable.exc_type,
+                    cm.unraisable.exc_value,
+                    cm.unraisable.exc_traceback,
+                )
+            )
+            warnings.warn(pytest.PytestUnraisableExceptionWarning(msg))
+
+
+@pytest.hookimpl(hookwrapper=True, tryfirst=True)
+def pytest_runtest_setup() -> Generator[None, None, None]:
+    yield from unraisable_exception_runtest_hook()
+
+
+@pytest.hookimpl(hookwrapper=True, tryfirst=True)
+def pytest_runtest_call() -> Generator[None, None, None]:
+    yield from unraisable_exception_runtest_hook()
+
+
+@pytest.hookimpl(hookwrapper=True, tryfirst=True)
+def pytest_runtest_teardown() -> Generator[None, None, None]:
+    yield from unraisable_exception_runtest_hook()
diff --git a/contrib/python/pytest/py3/_pytest/warning_types.py b/contrib/python/pytest/py3/_pytest/warning_types.py
new file mode 100644
index 0000000000..bd5f418734
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/warning_types.py
@@ -0,0 +1,170 @@
+import dataclasses
+import inspect
+import warnings
+from types import FunctionType
+from typing import Any
+from typing import Generic
+from typing import Type
+from typing import TypeVar
+
+from _pytest.compat import final
+
+
+class PytestWarning(UserWarning):
+    """Base class for all warnings emitted by pytest."""
+
+    __module__ = "pytest"
+
+
+@final
+class PytestAssertRewriteWarning(PytestWarning):
+    """Warning emitted by the pytest assert rewrite module."""
+
+    __module__ = "pytest"
+
+
+@final
+class PytestCacheWarning(PytestWarning):
+    """Warning emitted by the cache plugin in various situations."""
+
+    __module__ = "pytest"
+
+
+@final
+class PytestConfigWarning(PytestWarning):
+    """Warning emitted for configuration issues."""
+
+    __module__ = "pytest"
+
+
+@final
+class PytestCollectionWarning(PytestWarning):
+    """Warning emitted when pytest is not able to collect a file or symbol in a module."""
+
+    __module__ = "pytest"
+
+
+class PytestDeprecationWarning(PytestWarning, DeprecationWarning):
+    """Warning class for features that will be removed in a future version."""
+
+    __module__ = "pytest"
+
+
+class PytestRemovedIn8Warning(PytestDeprecationWarning):
+    """Warning class for features that will be removed in pytest 8."""
+
+    __module__ = "pytest"
+
+
+class PytestReturnNotNoneWarning(PytestRemovedIn8Warning):
+    """Warning emitted when a test function is returning value other than None."""
+
+    __module__ = "pytest"
+
+
+@final
+class PytestExperimentalApiWarning(PytestWarning, FutureWarning):
+    """Warning category used to denote experiments in pytest.
+
+    Use sparingly as the API might change or even be removed completely in a
+    future version.
+    """
+
+    __module__ = "pytest"
+
+    @classmethod
+    def simple(cls, apiname: str) -> "PytestExperimentalApiWarning":
+        return cls(
+            "{apiname} is an experimental api that may change over time".format(
+                apiname=apiname
+            )
+        )
+
+
+@final
+class PytestUnhandledCoroutineWarning(PytestReturnNotNoneWarning):
+    """Warning emitted for an unhandled coroutine.
+
+    A coroutine was encountered when collecting test functions, but was not
+    handled by any async-aware plugin.
+    Coroutine test functions are not natively supported.
+    """
+
+    __module__ = "pytest"
+
+
+@final
+class PytestUnknownMarkWarning(PytestWarning):
+    """Warning emitted on use of unknown markers.
+
+    See :ref:`mark` for details.
+    """
+
+    __module__ = "pytest"
+
+
+@final
+class PytestUnraisableExceptionWarning(PytestWarning):
+    """An unraisable exception was reported.
+
+    Unraisable exceptions are exceptions raised in :meth:`__del__ <object.__del__>`
+    implementations and similar situations when the exception cannot be raised
+    as normal.
+    """
+
+    __module__ = "pytest"
+
+
+@final
+class PytestUnhandledThreadExceptionWarning(PytestWarning):
+    """An unhandled exception occurred in a :class:`~threading.Thread`.
+
+    Such exceptions don't propagate normally.
+    """
+
+    __module__ = "pytest"
+
+
+_W = TypeVar("_W", bound=PytestWarning)
+
+
+@final
+@dataclasses.dataclass
+class UnformattedWarning(Generic[_W]):
+    """A warning meant to be formatted during runtime.
+
+    This is used to hold warnings that need to format their message at runtime,
+    as opposed to a direct message.
+    """
+
+    category: Type["_W"]
+    template: str
+
+    def format(self, **kwargs: Any) -> _W:
+        """Return an instance of the warning category, formatted with given kwargs."""
+        return self.category(self.template.format(**kwargs))
+
+
+def warn_explicit_for(method: FunctionType, message: PytestWarning) -> None:
+    """
+    Issue the warning :param:`message` for the definition of the given :param:`method`
+
+    this helps to log warnings for functions defined prior to finding an issue with them
+    (like hook wrappers being marked in a legacy mechanism)
+    """
+    lineno = method.__code__.co_firstlineno
+    filename = inspect.getfile(method)
+    module = method.__module__
+    mod_globals = method.__globals__
+    try:
+        warnings.warn_explicit(
+            message,
+            type(message),
+            filename=filename,
+            module=module,
+            registry=mod_globals.setdefault("__warningregistry__", {}),
+            lineno=lineno,
+        )
+    except Warning as w:
+        # If warnings are errors (e.g. -Werror), location information gets lost, so we add it to the message.
+        raise type(w)(f"{w}\n at {filename}:{lineno}") from None
diff --git a/contrib/python/pytest/py3/_pytest/warnings.py b/contrib/python/pytest/py3/_pytest/warnings.py
new file mode 100644
index 0000000000..4aaa944529
--- /dev/null
+++ b/contrib/python/pytest/py3/_pytest/warnings.py
@@ -0,0 +1,148 @@
+import sys
+import warnings
+from contextlib import contextmanager
+from typing import Generator
+from typing import Optional
+from typing import TYPE_CHECKING
+
+import pytest
+from _pytest.config import apply_warning_filters
+from _pytest.config import Config
+from _pytest.config import parse_warning_filter
+from _pytest.main import Session
+from _pytest.nodes import Item
+from _pytest.terminal import TerminalReporter
+
+if TYPE_CHECKING:
+    from typing_extensions import Literal
+
+
+def pytest_configure(config: Config) -> None:
+    config.addinivalue_line(
+        "markers",
+        "filterwarnings(warning): add a warning filter to the given test. "
+        "see https://docs.pytest.org/en/stable/how-to/capture-warnings.html#pytest-mark-filterwarnings ",
+    )
+
+
+@contextmanager
+def catch_warnings_for_item(
+    config: Config,
+    ihook,
+    when: "Literal['config', 'collect', 'runtest']",
+    item: Optional[Item],
+) -> Generator[None, None, None]:
+    """Context manager that catches warnings generated in the contained execution block.
+
+    ``item`` can be None if we are not in the context of an item execution.
+
+    Each warning captured triggers the ``pytest_warning_recorded`` hook.
+    """
+    config_filters = config.getini("filterwarnings")
+    cmdline_filters = config.known_args_namespace.pythonwarnings or []
+    with warnings.catch_warnings(record=True) as log:
+        # mypy can't infer that record=True means log is not None; help it.
+        assert log is not None
+
+        if not sys.warnoptions:
+            # If user is not explicitly configuring warning filters, show deprecation warnings by default (#2908).
+            warnings.filterwarnings("always", category=DeprecationWarning)
+            warnings.filterwarnings("always", category=PendingDeprecationWarning)
+
+        apply_warning_filters(config_filters, cmdline_filters)
+
+        # apply filters from "filterwarnings" marks
+        nodeid = "" if item is None else item.nodeid
+        if item is not None:
+            for mark in item.iter_markers(name="filterwarnings"):
+                for arg in mark.args:
+                    warnings.filterwarnings(*parse_warning_filter(arg, escape=False))
+
+        yield
+
+        for warning_message in log:
+            ihook.pytest_warning_recorded.call_historic(
+                kwargs=dict(
+                    warning_message=warning_message,
+                    nodeid=nodeid,
+                    when=when,
+                    location=None,
+                )
+            )
+
+
+def warning_record_to_str(warning_message: warnings.WarningMessage) -> str:
+    """Convert a warnings.WarningMessage to a string."""
+    warn_msg = warning_message.message
+    msg = warnings.formatwarning(
+        str(warn_msg),
+        warning_message.category,
+        warning_message.filename,
+        warning_message.lineno,
+        warning_message.line,
+    )
+    if warning_message.source is not None:
+        try:
+            import tracemalloc
+        except ImportError:
+            pass
+        else:
+            tb = tracemalloc.get_object_traceback(warning_message.source)
+            if tb is not None:
+                formatted_tb = "\n".join(tb.format())
+                # Use a leading new line to better separate the (large) output
+                # from the traceback to the previous warning text.
+                msg += f"\nObject allocated at:\n{formatted_tb}"
+            else:
+                # No need for a leading new line.
+                url = "https://docs.pytest.org/en/stable/how-to/capture-warnings.html#resource-warnings"
+                msg += "Enable tracemalloc to get traceback where the object was allocated.\n"
+                msg += f"See {url} for more info."
+    return msg
+
+
+@pytest.hookimpl(hookwrapper=True, tryfirst=True)
+def pytest_runtest_protocol(item: Item) -> Generator[None, None, None]:
+    with catch_warnings_for_item(
+        config=item.config, ihook=item.ihook, when="runtest", item=item
+    ):
+        yield
+
+
+@pytest.hookimpl(hookwrapper=True, tryfirst=True)
+def pytest_collection(session: Session) -> Generator[None, None, None]:
+    config = session.config
+    with catch_warnings_for_item(
+        config=config, ihook=config.hook, when="collect", item=None
+    ):
+        yield
+
+
+@pytest.hookimpl(hookwrapper=True)
+def pytest_terminal_summary(
+    terminalreporter: TerminalReporter,
+) -> Generator[None, None, None]:
+    config = terminalreporter.config
+    with catch_warnings_for_item(
+        config=config, ihook=config.hook, when="config", item=None
+    ):
+        yield
+
+
+@pytest.hookimpl(hookwrapper=True)
+def pytest_sessionfinish(session: Session) -> Generator[None, None, None]:
+    config = session.config
+    with catch_warnings_for_item(
+        config=config, ihook=config.hook, when="config", item=None
+    ):
+        yield
+
+
+@pytest.hookimpl(hookwrapper=True)
+def pytest_load_initial_conftests(
+    early_config: "Config",
+) -> Generator[None, None, None]:
+    with catch_warnings_for_item(
+        config=early_config, ihook=early_config.hook, when="config", item=None
+    ):
+        yield
diff --git a/contrib/python/pytest/py3/pytest/__init__.py b/contrib/python/pytest/py3/pytest/__init__.py
new file mode 100644
index 0000000000..9c1d5d204d
--- /dev/null
+++ b/contrib/python/pytest/py3/pytest/__init__.py
@@ -0,0 +1,171 @@
+# PYTHON_ARGCOMPLETE_OK
+"""pytest: unit and functional testing with Python."""
+from _pytest import __version__
+from _pytest import version_tuple
+from _pytest._code import ExceptionInfo
+from _pytest.assertion import register_assert_rewrite
+from _pytest.cacheprovider import Cache
+from _pytest.capture import CaptureFixture
+from _pytest.config import cmdline
+from _pytest.config import Config
+from _pytest.config import console_main
+from _pytest.config import ExitCode
+from _pytest.config import hookimpl
+from _pytest.config import hookspec
+from _pytest.config import main
+from _pytest.config import PytestPluginManager
+from _pytest.config import UsageError
+from _pytest.config.argparsing import OptionGroup
+from _pytest.config.argparsing import Parser
+from _pytest.debugging import pytestPDB as __pytestPDB
+from _pytest.doctest import DoctestItem
+from _pytest.fixtures import fixture
+from _pytest.fixtures import FixtureLookupError
+from _pytest.fixtures import FixtureRequest
+from _pytest.fixtures import yield_fixture
+from _pytest.freeze_support import freeze_includes
+from _pytest.legacypath import TempdirFactory
+from _pytest.legacypath import Testdir
+from _pytest.logging import LogCaptureFixture
+from _pytest.main import Session
+from _pytest.mark import Mark
+from _pytest.mark import MARK_GEN as mark
+from _pytest.mark import MarkDecorator
+from _pytest.mark import MarkGenerator
+from _pytest.mark import param
+from _pytest.monkeypatch import MonkeyPatch
+from _pytest.nodes import Collector
+from _pytest.nodes import File
+from _pytest.nodes import Item
+from _pytest.outcomes import exit
+from _pytest.outcomes import fail
+from _pytest.outcomes import importorskip
+from _pytest.outcomes import skip
+from _pytest.outcomes import xfail
+from _pytest.pytester import HookRecorder
+from _pytest.pytester import LineMatcher
+from _pytest.pytester import Pytester
+from _pytest.pytester import RecordedHookCall
+from _pytest.pytester import RunResult
+from _pytest.python import Class
+from _pytest.python import Function
+from _pytest.python import Metafunc
+from _pytest.python import Module
+from _pytest.python import Package
+from _pytest.python_api import approx
+from _pytest.python_api import raises
+from _pytest.recwarn import deprecated_call
+from _pytest.recwarn import WarningsRecorder
+from _pytest.recwarn import warns
+from _pytest.reports import CollectReport
+from _pytest.reports import TestReport
+from _pytest.runner import CallInfo
+from _pytest.stash import Stash
+from _pytest.stash import StashKey
+from _pytest.terminal import TestShortLogReport
+from _pytest.tmpdir import TempPathFactory
+from _pytest.warning_types import PytestAssertRewriteWarning
+from _pytest.warning_types import PytestCacheWarning
+from _pytest.warning_types import PytestCollectionWarning
+from _pytest.warning_types import PytestConfigWarning
+from _pytest.warning_types import PytestDeprecationWarning
+from _pytest.warning_types import PytestExperimentalApiWarning
+from _pytest.warning_types import PytestRemovedIn8Warning
+from _pytest.warning_types import PytestReturnNotNoneWarning
+from _pytest.warning_types import PytestUnhandledCoroutineWarning
+from _pytest.warning_types import PytestUnhandledThreadExceptionWarning
+from _pytest.warning_types import PytestUnknownMarkWarning
+from _pytest.warning_types import PytestUnraisableExceptionWarning
+from _pytest.warning_types import PytestWarning
+
+set_trace = __pytestPDB.set_trace
+
+
+__all__ = [
+    "__version__",
+    "approx",
+    "Cache",
+    "CallInfo",
+    "CaptureFixture",
+    "Class",
+    "cmdline",
+    "Collector",
+    "CollectReport",
+    "Config",
+    "console_main",
+    "deprecated_call",
+    "DoctestItem",
+    "exit",
+    "ExceptionInfo",
+    "ExitCode",
+    "fail",
+    "File",
+    "fixture",
+    "FixtureLookupError",
+    "FixtureRequest",
+    "freeze_includes",
+    "Function",
+    "hookimpl",
+    "HookRecorder",
+    "hookspec",
+    "importorskip",
+    "Item",
+    "LineMatcher",
+    "LogCaptureFixture",
+    "main",
+    "mark",
+    "Mark",
+    "MarkDecorator",
+    "MarkGenerator",
+    "Metafunc",
+    "Module",
+    "MonkeyPatch",
+    "OptionGroup",
+    "Package",
+    "param",
+    "Parser",
+    "PytestAssertRewriteWarning",
+    "PytestCacheWarning",
+    "PytestCollectionWarning",
+    "PytestConfigWarning",
+    "PytestDeprecationWarning",
+    "PytestExperimentalApiWarning",
+    "PytestRemovedIn8Warning",
+    "PytestReturnNotNoneWarning",
+    "Pytester",
+    "PytestPluginManager",
+    "PytestUnhandledCoroutineWarning",
+    "PytestUnhandledThreadExceptionWarning",
+    "PytestUnknownMarkWarning",
+    "PytestUnraisableExceptionWarning",
+    "PytestWarning",
+    "raises",
+    "RecordedHookCall",
+    "register_assert_rewrite",
+    "RunResult",
+    "Session",
+    "set_trace",
+    "skip",
+    "Stash",
+    "StashKey",
+    "version_tuple",
+    "TempdirFactory",
+    "TempPathFactory",
+    "Testdir",
+    "TestReport",
+    "TestShortLogReport",
+    "UsageError",
+    "WarningsRecorder",
+    "warns",
+    "xfail",
+    "yield_fixture",
+]
+
+
+def __getattr__(name: str) -> object:
+    if name == "Instance":
+        # The import emits a deprecation warning.
+        from _pytest.python import Instance
+
+        return Instance
+    raise AttributeError(f"module {__name__} has no attribute {name}")
diff --git a/contrib/python/pytest/py3/pytest/__main__.py b/contrib/python/pytest/py3/pytest/__main__.py
new file mode 100644
index 0000000000..b170152937
--- /dev/null
+++ b/contrib/python/pytest/py3/pytest/__main__.py
@@ -0,0 +1,5 @@
+"""The pytest entry point."""
+import pytest
+
+if __name__ == "__main__":
+    raise SystemExit(pytest.console_main())
diff --git a/contrib/python/pytest/py3/pytest/py.typed b/contrib/python/pytest/py3/pytest/py.typed
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/contrib/python/pytest/py3/pytest/py.typed
diff --git a/contrib/python/pytest/py3/ya.make b/contrib/python/pytest/py3/ya.make
new file mode 100644
index 0000000000..8bef9919d6
--- /dev/null
+++ b/contrib/python/pytest/py3/ya.make
@@ -0,0 +1,104 @@
+# Generated by devtools/yamaker (pypi).
+
+PY3_LIBRARY()
+
+VERSION(7.4.2)
+
+LICENSE(MIT)
+
+PEERDIR(
+    contrib/python/iniconfig
+    contrib/python/packaging
+    contrib/python/pluggy
+)
+
+NO_LINT()
+
+NO_CHECK_IMPORTS(
+    _pytest.*
+)
+
+PY_SRCS(
+    TOP_LEVEL
+    _pytest/__init__.py
+    _pytest/_argcomplete.py
+    _pytest/_code/__init__.py
+    _pytest/_code/code.py
+    _pytest/_code/source.py
+    _pytest/_io/__init__.py
+    _pytest/_io/saferepr.py
+    _pytest/_io/terminalwriter.py
+    _pytest/_io/wcwidth.py
+    _pytest/_py/__init__.py
+    _pytest/_py/error.py
+    _pytest/_py/path.py
+    _pytest/_version.py
+    _pytest/assertion/__init__.py
+    _pytest/assertion/rewrite.py
+    _pytest/assertion/truncate.py
+    _pytest/assertion/util.py
+    _pytest/cacheprovider.py
+    _pytest/capture.py
+    _pytest/compat.py
+    _pytest/config/__init__.py
+    _pytest/config/argparsing.py
+    _pytest/config/compat.py
+    _pytest/config/exceptions.py
+    _pytest/config/findpaths.py
+    _pytest/debugging.py
+    _pytest/deprecated.py
+    _pytest/doctest.py
+    _pytest/faulthandler.py
+    _pytest/fixtures.py
+    _pytest/freeze_support.py
+    _pytest/helpconfig.py
+    _pytest/hookspec.py
+    _pytest/junitxml.py
+    _pytest/legacypath.py
+    _pytest/logging.py
+    _pytest/main.py
+    _pytest/mark/__init__.py
+    _pytest/mark/expression.py
+    _pytest/mark/structures.py
+    _pytest/monkeypatch.py
+    _pytest/nodes.py
+    _pytest/nose.py
+    _pytest/outcomes.py
+    _pytest/pastebin.py
+    _pytest/pathlib.py
+    _pytest/pytester.py
+    _pytest/pytester_assertions.py
+    _pytest/python.py
+    _pytest/python_api.py
+    _pytest/python_path.py
+    _pytest/recwarn.py
+    _pytest/reports.py
+    _pytest/runner.py
+    _pytest/scope.py
+    _pytest/setuponly.py
+    _pytest/setupplan.py
+    _pytest/skipping.py
+    _pytest/stash.py
+    _pytest/stepwise.py
+    _pytest/terminal.py
+    _pytest/threadexception.py
+    _pytest/timing.py
+    _pytest/tmpdir.py
+    _pytest/unittest.py
+    _pytest/unraisableexception.py
+    _pytest/warning_types.py
+    _pytest/warnings.py
+    pytest/__init__.py
+    pytest/__main__.py
+)
+
+RESOURCE_FILES(
+    PREFIX contrib/python/pytest/py3/
+    .dist-info/METADATA
+    .dist-info/entry_points.txt
+    .dist-info/top_level.txt
+    _pytest/py.typed
+    pytest/py.typed
+)
+
+END()
diff --git a/contrib/python/pytest/ya.make b/contrib/python/pytest/ya.make
new file mode 100644
index 0000000000..3a2f78bc8a
--- /dev/null
+++ b/contrib/python/pytest/ya.make
@@ -0,0 +1,18 @@
+PY23_LIBRARY()
+
+LICENSE(Service-Py23-Proxy)
+
+IF (PYTHON2)
+    PEERDIR(contrib/python/pytest/py2)
+ELSE()
+    PEERDIR(contrib/python/pytest/py3)
+ENDIF()
+
+NO_LINT()
+
+END()
+
+RECURSE(
+    py2
+    py3
+)