Aug 8, 2025 · Jun 22, 2025 · Jun 22, 2025 · Jun 24, 2025 · Jul 4, 2025 · Jul 4, 2025
diff --git a/Lib/test/test_gc.py b/Lib/test/test_gc.py
        # this test checks regular garbage collection
        assert_python_ok("-c", code_inside_function)

    def test_type_weakref_with_callback_should_be_none(self):
        # This test checks that weakrefs for types with callbacks
        # are cleared before the finalizer is called
        code = """
            import weakref
            def test():
                class Class:
                    def __init__(self):
                        self._self = self
                        self._z = weakref.ref(Class, lambda x: None)

                    def __del__(self):
                        assert self._z() is None, "Type weakref is not None"

                Class()

            test()
        """
        _, _, stderr = assert_python_ok("-c", code)
        assert b"Type weakref is not None" not in stderr

    def test_type_weakref_without_callback_should_be_not_none(self):
        # This test checks that weakrefs for types without callbacks
        # are cleared after the finalizer is called
        code = """
            import weakref
            def test():
                class Class:
                    def __init__(self):
                        self._self = self
                        self._x = weakref.ref(self)
                        self._z = weakref.ref(Class)

                    def __del__(self):
                        assert self._x() is None, "Instance weakref is not None"
                        assert self._z() is Class, "Type weakref is not Class"

                Class()

            test()
        """
        _, _, stderr = assert_python_ok("-c", code)
        assert b"Instance weakref is not None" not in stderr
        assert b"Type weakref is not Class" not in stderr


 class IncrementalGCTests(unittest.TestCase):
    @unittest.skipIf(_testinternalcapi is None, "requires _testinternalcapi")
Original file line number	Diff line number	Diff line change
Expand Up		@@ -1156,6 +1156,51 @@ def test():
		# this test checks regular garbage collection
		assert_python_ok("-c", code_inside_function)

		def test_type_weakref_with_callback_should_be_none(self):
		# This test checks that weakrefs for types with callbacks
		# are cleared before the finalizer is called
		code = """
		import weakref
		def test():
		class Class:
		def __init__(self):
		self._self = self
		self._z = weakref.ref(Class, lambda x: None)

		def __del__(self):
		assert self._z() is None, "Type weakref is not None"

		Class()

		test()
		"""
		_, _, stderr = assert_python_ok("-c", code)
		assert b"Type weakref is not None" not in stderr

		def test_type_weakref_without_callback_should_be_not_none(self):
		# This test checks that weakrefs for types without callbacks
		# are cleared after the finalizer is called
		code = """
		import weakref
		def test():
		class Class:
		def __init__(self):
		self._self = self
		self._x = weakref.ref(self)
		self._z = weakref.ref(Class)

		def __del__(self):
		assert self._x() is None, "Instance weakref is not None"
		assert self._z() is Class, "Type weakref is not Class"

		Class()

		test()
		"""
		_, _, stderr = assert_python_ok("-c", code)
		assert b"Instance weakref is not None" not in stderr
		assert b"Type weakref is not Class" not in stderr
sergey-miryanov marked this conversation as resolved. OutdatedShow resolvedHide resolved


		class IncrementalGCTests(unittest.TestCase):
		@unittest.skipIf(_testinternalcapi is None, "requires _testinternalcapi")
Expand Down