add ydb deps

30 files changed, 863 insertions, 0 deletions

diff --git a/library/python/runtime_py3/test/.dist-info/METADATA b/library/python/runtime_py3/test/.dist-info/METADATA
new file mode 100644
index 0000000000..bb36162199
--- /dev/null
+++ b/library/python/runtime_py3/test/.dist-info/METADATA
@@ -0,0 +1,14 @@
+Metadata-Version: 2.1
+Name: foo-bar
+Version: 1.2.3
+Summary: 
+Home-page: https://foo.org/
+Author: Foo
+Author-email: foo@ya.com
+License: UNKNOWN
+Platform: any
+Classifier: Development Status :: 4 - Beta
+Classifier: Programming Language :: Python :: 3
+Requires-Python: >=3.8
+Requires-Dist: Werkzeug (>=0.15)
+Requires-Dist: Jinja2 (>=2.10.1)
diff --git a/library/python/runtime_py3/test/.dist-info/RECORD b/library/python/runtime_py3/test/.dist-info/RECORD
new file mode 100644
index 0000000000..dabbbff80d
--- /dev/null
+++ b/library/python/runtime_py3/test/.dist-info/RECORD
@@ -0,0 +1 @@
+foo_bar.py,sha256=0000000000000000000000000000000000000000000,20
diff --git a/library/python/runtime_py3/test/.dist-info/entry_points.txt b/library/python/runtime_py3/test/.dist-info/entry_points.txt
new file mode 100644
index 0000000000..f5e2fd2657
--- /dev/null
+++ b/library/python/runtime_py3/test/.dist-info/entry_points.txt
@@ -0,0 +1,2 @@
+[console_scripts]
+foo_cli = foo_bar:cli
diff --git a/library/python/runtime_py3/test/.dist-info/top_level.txt b/library/python/runtime_py3/test/.dist-info/top_level.txt
new file mode 100644
index 0000000000..d2c068bc6b
--- /dev/null
+++ b/library/python/runtime_py3/test/.dist-info/top_level.txt
@@ -0,0 +1 @@
+foo_bar
diff --git a/library/python/runtime_py3/test/canondata/result.json b/library/python/runtime_py3/test/canondata/result.json
new file mode 100644
index 0000000000..8e684deb43
--- /dev/null
+++ b/library/python/runtime_py3/test/canondata/result.json
@@ -0,0 +1,50 @@
+{
+    "test_traceback.test_traceback[custom-default]": {
+        "stderr": {
+            "uri": "file://test_traceback.test_traceback_custom-default_/stderr.txt"
+        },
+        "stdout": {
+            "uri": "file://test_traceback.test_traceback_custom-default_/stdout.txt"
+        }
+    },
+    "test_traceback.test_traceback[custom-ultratb_color]": {
+        "stderr": {
+            "uri": "file://test_traceback.test_traceback_custom-ultratb_color_/stderr.txt"
+        },
+        "stdout": {
+            "uri": "file://test_traceback.test_traceback_custom-ultratb_color_/stdout.txt"
+        }
+    },
+    "test_traceback.test_traceback[custom-ultratb_verbose]": {
+        "stderr": {
+            "uri": "file://test_traceback.test_traceback_custom-ultratb_verbose_/stderr.txt"
+        },
+        "stdout": {
+            "uri": "file://test_traceback.test_traceback_custom-ultratb_verbose_/stdout.txt"
+        }
+    },
+    "test_traceback.test_traceback[main-default]": {
+        "stderr": {
+            "uri": "file://test_traceback.test_traceback_main-default_/stderr.txt"
+        },
+        "stdout": {
+            "uri": "file://test_traceback.test_traceback_main-default_/stdout.txt"
+        }
+    },
+    "test_traceback.test_traceback[main-ultratb_color]": {
+        "stderr": {
+            "uri": "file://test_traceback.test_traceback_main-ultratb_color_/stderr.txt"
+        },
+        "stdout": {
+            "uri": "file://test_traceback.test_traceback_main-ultratb_color_/stdout.txt"
+        }
+    },
+    "test_traceback.test_traceback[main-ultratb_verbose]": {
+        "stderr": {
+            "uri": "file://test_traceback.test_traceback_main-ultratb_verbose_/stderr.txt"
+        },
+        "stdout": {
+            "uri": "file://test_traceback.test_traceback_main-ultratb_verbose_/stdout.txt"
+        }
+    }
+}
diff --git a/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_custom-default_/stderr.txt b/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_custom-default_/stderr.txt
new file mode 100644
index 0000000000..a18678b50e
--- /dev/null
+++ b/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_custom-default_/stderr.txt
@@ -0,0 +1,14 @@
+Traceback (most recent call last):
+  File "library/python/runtime_py3/test/traceback/crash.py", line 42, in main
+    one()
+  File "library/python/runtime_py3/test/traceback/crash.py", line 11, in one
+    modfunc(two)  # aaa
+    ^^^^^^^^^^^^
+  File "library/python/runtime_py3/test/traceback/mod/__init__.py", line 3, in modfunc
+    f()  # call back to caller
+    ^^^
+  File "library/python/runtime_py3/test/traceback/crash.py", line 15, in two
+    three(42)
+  File "library/python/runtime_py3/test/traceback/crash.py", line 19, in three
+    raise RuntimeError(f"Kaboom! I'm dead: {x}")
+RuntimeError: Kaboom! I'm dead: 42
diff --git a/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_custom-default_/stdout.txt b/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_custom-default_/stdout.txt
new file mode 100644
index 0000000000..2c9793eb14
--- /dev/null
+++ b/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_custom-default_/stdout.txt
@@ -0,0 +1,2 @@
+__name__ = library.python.runtime_py3.test.traceback.crash
+__file__ = library/python/runtime_py3/test/traceback/crash.py
diff --git a/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_custom-ultratb_color_/stderr.txt b/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_custom-ultratb_color_/stderr.txt
new file mode 100644
index 0000000000..a28234f11c
--- /dev/null
+++ b/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_custom-ultratb_color_/stderr.txt
@@ -0,0 +1,13 @@
+Traceback (most recent call last):
+  File library/python/runtime_py3/test/traceback/crash.py:42 in main
+    one()
+  File library/python/runtime_py3/test/traceback/crash.py:11 in one
+    modfunc(two)  # aaa
+  File library/python/runtime_py3/test/traceback/mod/__init__.py:3 in modfunc
+    f()  # call back to caller
+  File library/python/runtime_py3/test/traceback/crash.py:15 in two
+    three(42)
+  File library/python/runtime_py3/test/traceback/crash.py:19 in three
+    raise RuntimeError(f"Kaboom! I'm dead: {x}")
+RuntimeError: Kaboom! I'm dead: 42
+
diff --git a/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_custom-ultratb_color_/stdout.txt b/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_custom-ultratb_color_/stdout.txt
new file mode 100644
index 0000000000..2c9793eb14
--- /dev/null
+++ b/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_custom-ultratb_color_/stdout.txt
@@ -0,0 +1,2 @@
+__name__ = library.python.runtime_py3.test.traceback.crash
+__file__ = library/python/runtime_py3/test/traceback/crash.py
diff --git a/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_custom-ultratb_verbose_/stderr.txt b/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_custom-ultratb_verbose_/stderr.txt
new file mode 100644
index 0000000000..f5545c6976
--- /dev/null
+++ b/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_custom-ultratb_verbose_/stderr.txt
@@ -0,0 +1,27 @@
+---------------------------------------------------------------------------
+RuntimeError                              Traceback (most recent call last)
+File library/python/runtime_py3/test/traceback/crash.py:42, in main()
+     39 time.time = lambda: 1531996624.0  # Freeze time
+     40 sys.executable = "<traceback test>"
+---> 42 one()
+
+File library/python/runtime_py3/test/traceback/crash.py:11, in one()
+     10 def one():
+---> 11     modfunc(two)
+
+File library/python/runtime_py3/test/traceback/mod/__init__.py:3, in modfunc(f=<function two>)
+      1 def modfunc(f):
+      2     # lalala
+----> 3     f()
+        f = <function two>
+
+File library/python/runtime_py3/test/traceback/crash.py:15, in two()
+     14 def two():
+---> 15     three(42)
+
+File library/python/runtime_py3/test/traceback/crash.py:19, in three(x=42)
+     18 def three(x):
+---> 19     raise RuntimeError(f"Kaboom! I'm dead: {x}")
+        x = 42
+
+RuntimeError: Kaboom! I'm dead: 42
diff --git a/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_custom-ultratb_verbose_/stdout.txt b/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_custom-ultratb_verbose_/stdout.txt
new file mode 100644
index 0000000000..2c9793eb14
--- /dev/null
+++ b/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_custom-ultratb_verbose_/stdout.txt
@@ -0,0 +1,2 @@
+__name__ = library.python.runtime_py3.test.traceback.crash
+__file__ = library/python/runtime_py3/test/traceback/crash.py
diff --git a/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_main-default_/stderr.txt b/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_main-default_/stderr.txt
new file mode 100644
index 0000000000..a18678b50e
--- /dev/null
+++ b/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_main-default_/stderr.txt
@@ -0,0 +1,14 @@
+Traceback (most recent call last):
+  File "library/python/runtime_py3/test/traceback/crash.py", line 42, in main
+    one()
+  File "library/python/runtime_py3/test/traceback/crash.py", line 11, in one
+    modfunc(two)  # aaa
+    ^^^^^^^^^^^^
+  File "library/python/runtime_py3/test/traceback/mod/__init__.py", line 3, in modfunc
+    f()  # call back to caller
+    ^^^
+  File "library/python/runtime_py3/test/traceback/crash.py", line 15, in two
+    three(42)
+  File "library/python/runtime_py3/test/traceback/crash.py", line 19, in three
+    raise RuntimeError(f"Kaboom! I'm dead: {x}")
+RuntimeError: Kaboom! I'm dead: 42
diff --git a/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_main-default_/stdout.txt b/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_main-default_/stdout.txt
new file mode 100644
index 0000000000..2c9793eb14
--- /dev/null
+++ b/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_main-default_/stdout.txt
@@ -0,0 +1,2 @@
+__name__ = library.python.runtime_py3.test.traceback.crash
+__file__ = library/python/runtime_py3/test/traceback/crash.py
diff --git a/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_main-ultratb_color_/stderr.txt b/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_main-ultratb_color_/stderr.txt
new file mode 100644
index 0000000000..a28234f11c
--- /dev/null
+++ b/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_main-ultratb_color_/stderr.txt
@@ -0,0 +1,13 @@
+Traceback (most recent call last):
+  File library/python/runtime_py3/test/traceback/crash.py:42 in main
+    one()
+  File library/python/runtime_py3/test/traceback/crash.py:11 in one
+    modfunc(two)  # aaa
+  File library/python/runtime_py3/test/traceback/mod/__init__.py:3 in modfunc
+    f()  # call back to caller
+  File library/python/runtime_py3/test/traceback/crash.py:15 in two
+    three(42)
+  File library/python/runtime_py3/test/traceback/crash.py:19 in three
+    raise RuntimeError(f"Kaboom! I'm dead: {x}")
+RuntimeError: Kaboom! I'm dead: 42
+
diff --git a/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_main-ultratb_color_/stdout.txt b/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_main-ultratb_color_/stdout.txt
new file mode 100644
index 0000000000..2c9793eb14
--- /dev/null
+++ b/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_main-ultratb_color_/stdout.txt
@@ -0,0 +1,2 @@
+__name__ = library.python.runtime_py3.test.traceback.crash
+__file__ = library/python/runtime_py3/test/traceback/crash.py
diff --git a/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_main-ultratb_verbose_/stderr.txt b/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_main-ultratb_verbose_/stderr.txt
new file mode 100644
index 0000000000..f5545c6976
--- /dev/null
+++ b/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_main-ultratb_verbose_/stderr.txt
@@ -0,0 +1,27 @@
+---------------------------------------------------------------------------
+RuntimeError                              Traceback (most recent call last)
+File library/python/runtime_py3/test/traceback/crash.py:42, in main()
+     39 time.time = lambda: 1531996624.0  # Freeze time
+     40 sys.executable = "<traceback test>"
+---> 42 one()
+
+File library/python/runtime_py3/test/traceback/crash.py:11, in one()
+     10 def one():
+---> 11     modfunc(two)
+
+File library/python/runtime_py3/test/traceback/mod/__init__.py:3, in modfunc(f=<function two>)
+      1 def modfunc(f):
+      2     # lalala
+----> 3     f()
+        f = <function two>
+
+File library/python/runtime_py3/test/traceback/crash.py:15, in two()
+     14 def two():
+---> 15     three(42)
+
+File library/python/runtime_py3/test/traceback/crash.py:19, in three(x=42)
+     18 def three(x):
+---> 19     raise RuntimeError(f"Kaboom! I'm dead: {x}")
+        x = 42
+
+RuntimeError: Kaboom! I'm dead: 42
diff --git a/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_main-ultratb_verbose_/stdout.txt b/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_main-ultratb_verbose_/stdout.txt
new file mode 100644
index 0000000000..2c9793eb14
--- /dev/null
+++ b/library/python/runtime_py3/test/canondata/test_traceback.test_traceback_main-ultratb_verbose_/stdout.txt
@@ -0,0 +1,2 @@
+__name__ = library.python.runtime_py3.test.traceback.crash
+__file__ = library/python/runtime_py3/test/traceback/crash.py
diff --git a/library/python/runtime_py3/test/resources/__init__.py b/library/python/runtime_py3/test/resources/__init__.py
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/library/python/runtime_py3/test/resources/__init__.py
diff --git a/library/python/runtime_py3/test/resources/foo.txt b/library/python/runtime_py3/test/resources/foo.txt
new file mode 100644
index 0000000000..ba0e162e1c
--- /dev/null
+++ b/library/python/runtime_py3/test/resources/foo.txt
@@ -0,0 +1 @@
+bar
\ No newline at end of file
diff --git a/library/python/runtime_py3/test/resources/submodule/__init__.py b/library/python/runtime_py3/test/resources/submodule/__init__.py
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/library/python/runtime_py3/test/resources/submodule/__init__.py
diff --git a/library/python/runtime_py3/test/resources/submodule/bar.txt b/library/python/runtime_py3/test/resources/submodule/bar.txt
new file mode 100644
index 0000000000..1910281566
--- /dev/null
+++ b/library/python/runtime_py3/test/resources/submodule/bar.txt
@@ -0,0 +1 @@
+foo
\ No newline at end of file
diff --git a/library/python/runtime_py3/test/test_arcadia_source_finder.py b/library/python/runtime_py3/test/test_arcadia_source_finder.py
new file mode 100644
index 0000000000..5110abc412
--- /dev/null
+++ b/library/python/runtime_py3/test/test_arcadia_source_finder.py
@@ -0,0 +1,389 @@
+import stat
+import unittest
+import yaml
+from collections import namedtuple
+from unittest.mock import patch
+from parameterized import parameterized
+
+import __res as res
+
+
+NAMESPACE_PREFIX = b"py/namespace/"
+TEST_SOURCE_ROOT = "/home/arcadia"
+
+
+class ImporterMocks:
+    def __init__(self, mock_fs, mock_resources):
+        self._mock_fs = mock_fs
+        self._mock_resources = mock_resources
+        self._patchers = [
+            patch("__res.iter_keys", wraps=self._iter_keys),
+            patch("__res.__resource.find", wraps=self._resource_find),
+            patch("__res._path_isfile", wraps=self._path_isfile),
+            patch("__res._os.listdir", wraps=self._os_listdir),
+            patch("__res._os.lstat", wraps=self._os_lstat),
+        ]
+        for patcher in self._patchers:
+            patcher.start()
+
+    def stop(self):
+        for patcher in self._patchers:
+            patcher.stop()
+
+    def _iter_keys(self, prefix):
+        assert prefix == NAMESPACE_PREFIX
+        for k in self._mock_resources.keys():
+            yield k, k.removeprefix(prefix)
+
+    def _resource_find(self, key):
+        return self._mock_resources.get(key)
+
+    def _lookup_mock_fs(self, filename):
+        path = filename.lstrip("/").split("/")
+        curdir = self._mock_fs
+        for item in path:
+            if item in curdir:
+                curdir = curdir[item]
+            else:
+                return None
+        return curdir
+
+    def _path_isfile(self, filename):
+        f = self._lookup_mock_fs(filename)
+        return isinstance(f, str)
+
+    def _os_lstat(self, filename):
+        f = self._lookup_mock_fs(filename)
+        mode = stat.S_IFDIR if isinstance(f, dict) else stat.S_IFREG
+        return namedtuple("fake_stat_type", "st_mode")(st_mode=mode)
+
+    def _os_listdir(self, dirname):
+        f = self._lookup_mock_fs(dirname)
+        if isinstance(f, dict):
+            return f.keys()
+        else:
+            return []
+
+
+class ArcadiaSourceFinderTestCase(unittest.TestCase):
+    def setUp(self):
+        self.import_mock = ImporterMocks(yaml.safe_load(self._get_mock_fs()), self._get_mock_resources())
+        self.arcadia_source_finder = res.ArcadiaSourceFinder(TEST_SOURCE_ROOT)
+
+    def tearDown(self):
+        self.import_mock.stop()
+
+    def _get_mock_fs(self):
+        raise NotImplementedError()
+
+    def _get_mock_resources(self):
+        raise NotImplementedError()
+
+
+class TestLibraryWithoutNamespace(ArcadiaSourceFinderTestCase):
+    def _get_mock_fs(self):
+        return """
+           home:
+             arcadia:
+               project:
+                 lib:
+                   mod1.py: ""
+                   package1:
+                     mod2.py: ""
+        """
+
+    def _get_mock_resources(self):
+        return {
+            b"py/namespace/unique_prefix1/project/lib": b"project.lib.",
+        }
+
+    @parameterized.expand(
+        [
+            ("project.lib.mod1", b"project/lib/mod1.py"),
+            ("project.lib.package1.mod2", b"project/lib/package1/mod2.py"),
+            ("project.lib.unknown_module", None),
+            ("project.lib", None),  # package
+        ]
+    )
+    def test_get_module_path(self, module, path):
+        assert path == self.arcadia_source_finder.get_module_path(module)
+
+    @parameterized.expand(
+        [
+            ("project.lib.mod1", False),
+            ("project.lib.package1.mod2", False),
+            ("project", True),
+            ("project.lib", True),
+            ("project.lib.package1", True),
+        ]
+    )
+    def test_is_packages(self, module, is_package):
+        assert is_package == self.arcadia_source_finder.is_package(module)
+
+    def test_is_package_for_unknown_module(self):
+        self.assertRaises(
+            ImportError,
+            lambda: self.arcadia_source_finder.is_package("project.lib.package2"),
+        )
+
+    @parameterized.expand(
+        [
+            (
+                "",
+                {
+                    ("PFX.project", True),
+                },
+            ),
+            (
+                "project.",
+                {
+                    ("PFX.lib", True),
+                },
+            ),
+            (
+                "project.lib.",
+                {
+                    ("PFX.mod1", False),
+                    ("PFX.package1", True),
+                },
+            ),
+            (
+                "project.lib.package1.",
+                {
+                    ("PFX.mod2", False),
+                },
+            ),
+        ]
+    )
+    def test_iter_modules(self, package_prefix, expected):
+        got = self.arcadia_source_finder.iter_modules(package_prefix, "PFX.")
+        assert expected == set(got)
+
+    # Check iter_modules() don't crash and return correct result after not existing module was requested
+    def test_iter_modules_after_unknown_module_import(self):
+        self.arcadia_source_finder.get_module_path("project.unknown_module")
+        assert {("lib", True)} == set(self.arcadia_source_finder.iter_modules("project.", ""))
+
+
+class TestLibraryExtendedFromAnotherLibrary(ArcadiaSourceFinderTestCase):
+    def _get_mock_fs(self):
+        return """
+           home:
+             arcadia:
+               project:
+                 lib:
+                   mod1.py: ''
+                 lib_extension:
+                   mod2.py: ''
+        """
+
+    def _get_mock_resources(self):
+        return {
+            b"py/namespace/unique_prefix1/project/lib": b"project.lib.",
+            b"py/namespace/unique_prefix2/project/lib_extension": b"project.lib.",
+        }
+
+    @parameterized.expand(
+        [
+            ("project.lib.mod1", b"project/lib/mod1.py"),
+            ("project.lib.mod2", b"project/lib_extension/mod2.py"),
+        ]
+    )
+    def test_get_module_path(self, module, path):
+        assert path == self.arcadia_source_finder.get_module_path(module)
+
+    @parameterized.expand(
+        [
+            (
+                "project.lib.",
+                {
+                    ("PFX.mod1", False),
+                    ("PFX.mod2", False),
+                },
+            ),
+        ]
+    )
+    def test_iter_modules(self, package_prefix, expected):
+        got = self.arcadia_source_finder.iter_modules(package_prefix, "PFX.")
+        assert expected == set(got)
+
+
+class TestNamespaceAndTopLevelLibraries(ArcadiaSourceFinderTestCase):
+    def _get_mock_fs(self):
+        return """
+           home:
+             arcadia:
+               project:
+                 ns_lib:
+                   mod1.py: ''
+                 top_level_lib:
+                   mod2.py: ''
+        """
+
+    def _get_mock_resources(self):
+        return {
+            b"py/namespace/unique_prefix1/project/ns_lib": b"ns.",
+            b"py/namespace/unique_prefix2/project/top_level_lib": b".",
+        }
+
+    @parameterized.expand(
+        [
+            ("ns.mod1", b"project/ns_lib/mod1.py"),
+            ("mod2", b"project/top_level_lib/mod2.py"),
+        ]
+    )
+    def test_get_module_path(self, module, path):
+        assert path == self.arcadia_source_finder.get_module_path(module)
+
+    @parameterized.expand(
+        [
+            ("ns", True),
+            ("ns.mod1", False),
+            ("mod2", False),
+        ]
+    )
+    def test_is_packages(self, module, is_package):
+        assert is_package == self.arcadia_source_finder.is_package(module)
+
+    @parameterized.expand(
+        [
+            "project",
+            "project.ns_lib",
+            "project.top_level_lib",
+        ]
+    )
+    def test_is_package_for_unknown_modules(self, module):
+        self.assertRaises(ImportError, lambda: self.arcadia_source_finder.is_package(module))
+
+    @parameterized.expand(
+        [
+            (
+                "",
+                {
+                    ("PFX.ns", True),
+                    ("PFX.mod2", False),
+                },
+            ),
+            (
+                "ns.",
+                {
+                    ("PFX.mod1", False),
+                },
+            ),
+        ]
+    )
+    def test_iter_modules(self, package_prefix, expected):
+        got = self.arcadia_source_finder.iter_modules(package_prefix, "PFX.")
+        assert expected == set(got)
+
+
+class TestIgnoreDirectoriesWithYaMakeFile(ArcadiaSourceFinderTestCase):
+    """Packages and modules from tests should not be part of pylib namespace"""
+
+    def _get_mock_fs(self):
+        return """
+           home:
+             arcadia:
+               contrib:
+                 python:
+                   pylib:
+                     mod1.py: ""
+                     tests:
+                       conftest.py: ""
+                       ya.make: ""
+        """
+
+    def _get_mock_resources(self):
+        return {
+            b"py/namespace/unique_prefix1/contrib/python/pylib": b"pylib.",
+        }
+
+    def test_get_module_path_for_lib(self):
+        assert b"contrib/python/pylib/mod1.py" == self.arcadia_source_finder.get_module_path("pylib.mod1")
+
+    def test_get_module_for_tests(self):
+        assert self.arcadia_source_finder.get_module_path("pylib.tests.conftest") is None
+
+    def test_is_package_for_tests(self):
+        self.assertRaises(ImportError, lambda: self.arcadia_source_finder.is_package("pylib.tests"))
+
+
+class TestMergingNamespaceAndDirectoryPackages(ArcadiaSourceFinderTestCase):
+    """Merge parent package (top level in this test) dirs with namespace dirs (DEVTOOLS-8979)"""
+
+    def _get_mock_fs(self):
+        return """
+           home:
+             arcadia:
+               contrib:
+                 python:
+                   pylint:
+                     ya.make: ""
+                     pylint:
+                       __init__.py: ""
+                     patcher:
+                       patch.py: ""
+                       ya.make: ""
+        """
+
+    def _get_mock_resources(self):
+        return {
+            b"py/namespace/unique_prefix1/contrib/python/pylint": b".",
+            b"py/namespace/unique_prefix1/contrib/python/pylint/patcher": b"pylint.",
+        }
+
+    @parameterized.expand(
+        [
+            ("pylint.__init__", b"contrib/python/pylint/pylint/__init__.py"),
+            ("pylint.patch", b"contrib/python/pylint/patcher/patch.py"),
+        ]
+    )
+    def test_get_module_path(self, module, path):
+        assert path == self.arcadia_source_finder.get_module_path(module)
+
+
+class TestEmptyResources(ArcadiaSourceFinderTestCase):
+    def _get_mock_fs(self):
+        return """
+           home:
+             arcadia:
+               project:
+                 lib:
+                   mod1.py: ''
+        """
+
+    def _get_mock_resources(self):
+        return {}
+
+    def test_get_module_path(self):
+        assert self.arcadia_source_finder.get_module_path("project.lib.mod1") is None
+
+    def test_is_package(self):
+        self.assertRaises(ImportError, lambda: self.arcadia_source_finder.is_package("project"))
+
+    def test_iter_modules(self):
+        assert [] == list(self.arcadia_source_finder.iter_modules("", "PFX."))
+
+
+class TestDictionaryChangedSizeDuringIteration(ArcadiaSourceFinderTestCase):
+    def _get_mock_fs(self):
+        return """
+           home:
+             arcadia:
+               project:
+                 lib1:
+                   mod1.py: ''
+                 lib2:
+                   mod2.py: ''
+        """
+
+    def _get_mock_resources(self):
+        return {
+            b"py/namespace/unique_prefix1/project/lib1": b"project.lib1.",
+            b"py/namespace/unique_prefix1/project/lib2": b"project.lib2.",
+        }
+
+    def test_no_crash_on_recusive_iter_modules(self):
+        for package in self.arcadia_source_finder.iter_modules("project.", ""):
+            for _ in self.arcadia_source_finder.iter_modules(package[0], ""):
+                pass
diff --git a/library/python/runtime_py3/test/test_metadata.py b/library/python/runtime_py3/test/test_metadata.py
new file mode 100644
index 0000000000..686c176468
--- /dev/null
+++ b/library/python/runtime_py3/test/test_metadata.py
@@ -0,0 +1,44 @@
+import importlib.metadata as im
+
+import pytest
+
+
+@pytest.mark.parametrize("name", ("foo-bar", "foo_bar", "Foo-Bar"))
+def test_distribution(name):
+    assert im.distribution(name) is not None
+
+
+def test_unknown_package():
+    with pytest.raises(im.PackageNotFoundError):
+        im.distribution("bar")
+
+
+def test_version():
+    assert im.version("foo-bar") == "1.2.3"
+
+
+def test_metadata():
+    assert im.metadata("foo-bar") is not None
+
+
+def test_files():
+    files = im.files("foo-bar")
+    assert len(files) == 1
+    assert files[0].name == "foo_bar.py"
+    assert files[0].size == 20
+
+
+def test_requires():
+    assert im.requires("foo-bar") == ["Werkzeug (>=0.15)", "Jinja2 (>=2.10.1)"]
+
+
+def test_entry_points():
+    entry_points = im.entry_points()
+    assert "console_scripts" in entry_points
+
+    flg_found = False
+    for entry_point in entry_points["console_scripts"]:
+        if entry_point.name == "foo_cli" and entry_point.value == "foo_bar:cli":
+            flg_found = True
+
+    assert flg_found
diff --git a/library/python/runtime_py3/test/test_resources.py b/library/python/runtime_py3/test/test_resources.py
new file mode 100644
index 0000000000..059cc039e6
--- /dev/null
+++ b/library/python/runtime_py3/test/test_resources.py
@@ -0,0 +1,73 @@
+import importlib.resources as ir
+
+import pytest
+
+
+@pytest.mark.parametrize(
+    "package, resource",
+    (
+        ("resources", "foo.txt"),
+        ("resources.submodule", "bar.txt"),
+    ),
+)
+def test_is_resource_good_path(package, resource):
+    assert ir.is_resource(package, resource)
+
+
+@pytest.mark.parametrize(
+    "package, resource",
+    (
+        ("resources", "111.txt"),
+        ("resources.submodule", "222.txt"),
+    ),
+)
+def test_is_resource_missing(package, resource):
+    assert not ir.is_resource(package, resource)
+
+
+def test_is_resource_subresource_directory():
+    # Directories are not resources.
+    assert not ir.is_resource("resources", "submodule")
+
+
+@pytest.mark.parametrize(
+    "package, resource, expected",
+    (
+        ("resources", "foo.txt", b"bar"),
+        ("resources.submodule", "bar.txt", b"foo"),
+    ),
+)
+def test_read_binary_good_path(package, resource, expected):
+    assert ir.read_binary(package, resource) == expected
+
+
+def test_read_binary_missing():
+    with pytest.raises(FileNotFoundError):
+        ir.read_binary("resources", "111.txt")
+
+
+@pytest.mark.parametrize(
+    "package, resource, expected",
+    (
+        ("resources", "foo.txt", "bar"),
+        ("resources.submodule", "bar.txt", "foo"),
+    ),
+)
+def test_read_text_good_path(package, resource, expected):
+    assert ir.read_text(package, resource) == expected
+
+
+def test_read_text_missing():
+    with pytest.raises(FileNotFoundError):
+        ir.read_text("resources", "111.txt")
+
+
+@pytest.mark.parametrize(
+    "package, expected",
+    (
+        ("resources", ["submodule", "foo.txt"]),
+        ("resources.submodule", ["bar.txt"]),
+    ),
+)
+def test_contents_good_path(package, expected):
+    assert sorted(ir.contents(package)) == sorted(expected)
diff --git a/library/python/runtime_py3/test/test_traceback.py b/library/python/runtime_py3/test/test_traceback.py
new file mode 100644
index 0000000000..08aed1a510
--- /dev/null
+++ b/library/python/runtime_py3/test/test_traceback.py
@@ -0,0 +1,65 @@
+import os
+import re
+
+import pytest
+
+import yatest.common as yc
+
+
+def clean_traceback(traceback):
+    traceback = re.sub(rb"\033\[(\d|;)+?m", b"", traceback)  # strip ANSI codes
+    traceback = re.sub(rb" at 0x[0-9a-fA-F]+", b"", traceback)  # remove object ids
+    return traceback
+
+
+@pytest.mark.parametrize(
+    "mode",
+    [
+        "default",
+        "ultratb_color",
+        "ultratb_verbose",
+    ],
+)
+@pytest.mark.parametrize(
+    "entry_point",
+    [
+        "main",
+        "custom",
+    ],
+)
+def test_traceback(mode, entry_point):
+    tb_tool = yc.build_path("library/python/runtime_py3/test/traceback/traceback")
+    stdout_path = yc.test_output_path("stdout_raw.txt")
+    stderr_path = yc.test_output_path("stderr_raw.txt")
+    filtered_stdout_path = yc.test_output_path("stdout.txt")
+    filtered_stderr_path = yc.test_output_path("stderr.txt")
+
+    env = os.environ.copy()
+    env.pop("PYTHONPATH", None)  # Do not let program peek into its sources on filesystem
+    if entry_point == "custom":
+        env["Y_PYTHON_ENTRY_POINT"] = "library.python.runtime_py3.test.traceback.crash:main"
+
+    proc = yc.execute(
+        command=[tb_tool, mode],
+        env=env,
+        stdout=stdout_path,
+        stderr=stderr_path,
+        check_exit_code=False,
+    )
+
+    with open(filtered_stdout_path, "wb") as f:
+        f.write(clean_traceback(proc.std_out))
+
+    with open(filtered_stderr_path, "wb") as f:
+        f.write(clean_traceback(proc.std_err))
+
+    return {
+        "stdout": yc.canonical_file(
+            filtered_stdout_path,
+            local=True,
+        ),
+        "stderr": yc.canonical_file(
+            filtered_stderr_path,
+            local=True,
+        ),
+    }
diff --git a/library/python/runtime_py3/test/traceback/__main__.py b/library/python/runtime_py3/test/traceback/__main__.py
new file mode 100644
index 0000000000..364db169f0
--- /dev/null
+++ b/library/python/runtime_py3/test/traceback/__main__.py
@@ -0,0 +1,4 @@
+from library.python.runtime_py3.test.traceback.crash import main
+
+if __name__ == "__main__":
+    main()
diff --git a/library/python/runtime_py3/test/traceback/crash.py b/library/python/runtime_py3/test/traceback/crash.py
new file mode 100644
index 0000000000..dfd316d4c6
--- /dev/null
+++ b/library/python/runtime_py3/test/traceback/crash.py
@@ -0,0 +1,42 @@
+import argparse
+import sys
+import time
+
+from IPython.core import ultratb
+
+from .mod import modfunc
+
+
+def one():
+    modfunc(two)  # aaa
+
+
+def two():
+    three(42)
+
+
+def three(x):
+    raise RuntimeError(f"Kaboom! I'm dead: {x}")
+
+
+def main():
+    hooks = {
+        "default": lambda: sys.excepthook,
+        "ultratb_color": lambda: ultratb.ColorTB(ostream=sys.stderr),
+        "ultratb_verbose": lambda: ultratb.VerboseTB(ostream=sys.stderr),
+    }
+
+    parser = argparse.ArgumentParser()
+    parser.add_argument("hook", choices=sorted(hooks), default="default")
+
+    args = parser.parse_args()
+
+    sys.excepthook = hooks[args.hook]()
+
+    print("__name__ =", __name__)
+    print("__file__ =", __file__)
+
+    time.time = lambda: 1531996624.0  # Freeze time
+    sys.executable = "<traceback test>"
+
+    one()
diff --git a/library/python/runtime_py3/test/traceback/mod/__init__.py b/library/python/runtime_py3/test/traceback/mod/__init__.py
new file mode 100644
index 0000000000..f00843d786
--- /dev/null
+++ b/library/python/runtime_py3/test/traceback/mod/__init__.py
@@ -0,0 +1,3 @@
+def modfunc(f):
+    # lalala
+    f()  # call back to caller
diff --git a/library/python/runtime_py3/test/traceback/ya.make b/library/python/runtime_py3/test/traceback/ya.make
new file mode 100644
index 0000000000..0703e75401
--- /dev/null
+++ b/library/python/runtime_py3/test/traceback/ya.make
@@ -0,0 +1,16 @@
+PY3_PROGRAM()
+
+STYLE_PYTHON()
+
+PEERDIR(
+    contrib/python/ipython
+)
+
+PY_SRCS(
+    MAIN
+    __main__.py=main
+    crash.py
+    mod/__init__.py
+)
+
+END()
diff --git a/library/python/runtime_py3/test/ya.make b/library/python/runtime_py3/test/ya.make
new file mode 100644
index 0000000000..e0c4061ad2
--- /dev/null
+++ b/library/python/runtime_py3/test/ya.make
@@ -0,0 +1,37 @@
+PY3TEST()
+
+STYLE_PYTHON()
+
+DEPENDS(library/python/runtime_py3/test/traceback)
+
+PEERDIR(
+    contrib/python/parameterized
+    contrib/python/PyYAML
+)
+
+PY_SRCS(
+    TOP_LEVEL
+    resources/__init__.py
+    resources/submodule/__init__.py
+)
+
+TEST_SRCS(
+    test_metadata.py
+    test_resources.py
+    test_traceback.py
+    test_arcadia_source_finder.py
+)
+
+RESOURCE_FILES(
+    PREFIX library/python/runtime_py3/test/
+    .dist-info/METADATA
+    .dist-info/RECORD
+    .dist-info/entry_points.txt
+    .dist-info/top_level.txt
+    resources/foo.txt
+    resources/submodule/bar.txt
+)
+
+END()
+
+RECURSE_FOR_TESTS(traceback)