Nov 22, 2022 · Nov 21, 2022 · Nov 22, 2022
diff --git a/Lib/test/test_unittest/test_runner.py b/Lib/test/test_unittest/test_runner.py

        self.assertEqual(TestableTest._class_cleanups, [])

    def test_run_nested_test(self):
        ordering = []

        class InnerTest(unittest.TestCase):
            @classmethod
            def setUpClass(cls):
                ordering.append('inner setup')
                cls.addClassCleanup(ordering.append, 'inner cleanup')
            def test(self):
                ordering.append('inner test')

        class OuterTest(unittest.TestCase):
            @classmethod
            def setUpClass(cls):
                ordering.append('outer setup')
                cls.addClassCleanup(ordering.append, 'outer cleanup')
            def test(self):
                ordering.append('start outer test')
                runTests(InnerTest)
                ordering.append('end outer test')

        runTests(OuterTest)
        self.assertEqual(ordering, [
                'outer setup', 'start outer test',
                'inner setup', 'inner test', 'inner cleanup',
                'end outer test', 'outer cleanup'])


 class TestModuleCleanUp(unittest.TestCase):
    def test_add_and_do_ModuleCleanup(self):
diff --git a/Lib/unittest/case.py b/Lib/unittest/case.py
    # of difflib.  See #11763.
    _diffThreshold = 2**16

 # Attribute used by TestSuite for classSetUp

    _classSetupFailed = False

 _class_cleanups = []
 def __init_subclass__(cls, *args, **kwargs):
        # Attribute used by TestSuite for classSetUp
    cls._classSetupFailed = False
        cls._class_cleanups = []
    super().__init_subclass__(*args, **kwargs)

    def __init__(self, methodName='runTest'):
        """Create an instance of the class that will use the named test
diff --git a/Misc/NEWS.d/next/Library/2022-11-21-13-49-03.gh-issue-99645.9w1QKq.rst b/Misc/NEWS.d/next/Library/2022-11-21-13-49-03.gh-issue-99645.9w1QKq.rst
 Fix a bug in handling class cleanups in :class:`unittest.TestCase`.  Now
 ``addClassCleanup()`` uses separate lists for different ``TestCase``
 subclasses, and ``doClassCleanups()`` only cleans up the particular class.
Original file line number	Diff line number	Diff line change
Expand Up		@@ -536,6 +536,33 @@ def testNothing(self):

		self.assertEqual(TestableTest._class_cleanups, [])

		def test_run_nested_test(self):
		ordering = []

		class InnerTest(unittest.TestCase):
		@classmethod
		def setUpClass(cls):
		ordering.append('inner setup')
		cls.addClassCleanup(ordering.append, 'inner cleanup')
		def test(self):
		ordering.append('inner test')

		class OuterTest(unittest.TestCase):
		@classmethod
		def setUpClass(cls):
		ordering.append('outer setup')
		cls.addClassCleanup(ordering.append, 'outer cleanup')
		def test(self):
		ordering.append('start outer test')
		runTests(InnerTest)
		ordering.append('end outer test')

		runTests(OuterTest)
		self.assertEqual(ordering, [
		'outer setup', 'start outer test',
		'inner setup', 'inner test', 'inner cleanup',
		'end outer test', 'outer cleanup'])


		class TestModuleCleanUp(unittest.TestCase):
		def test_add_and_do_ModuleCleanup(self):
Expand Down
Original file line number	Diff line number	Diff line change
Expand Up		@@ -384,11 +384,11 @@ class TestCase(object):
		# of difflib. See #11763.
		_diffThreshold = 2**16

		# Attribute used by TestSuite for classSetUp

		_classSetupFailed = False

		_class_cleanups = []
		def __init_subclass__(cls, args, *kwargs):
		# Attribute used by TestSuite for classSetUp
		cls._classSetupFailed = False
		cls._class_cleanups = []
		super().__init_subclass__(args, *kwargs)

		def __init__(self, methodName='runTest'):
		"""Create an instance of the class that will use the named test
Expand Down
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,3 @@
		Fix a bug in handling class cleanups in :class:`unittest.TestCase`. Now
		``addClassCleanup()`` uses separate lists for different ``TestCase``
		subclasses, and ``doClassCleanups()`` only cleans up the particular class.