add ydb deps

1 files changed, 1856 insertions, 0 deletions

diff --git a/contrib/python/pytest/py3/_pytest/python.py b/contrib/python/pytest/py3/_pytest/python.py
new file mode 100644
index 00000000000..8b9dd9d1a5b
--- /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
[email protected](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
[email protected](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