Method test_original_class_is_gced

Lib/test/test_dataclasses/__init__.py:3964–4005

(self)

        self.assertEqual(CorrectSuper.args, ["default", "default"])

    def test_original_class_is_gced(self):
        # gh-135228: Make sure when we replace the class with slots=True, the original class
        # gets garbage collected.
        def make_simple():
            @dataclass(slots=True)
            class SlotsTest:
                pass

            return SlotsTest

        def make_with_annotations():
            @dataclass(slots=True)
            class SlotsTest:
                x: int

            return SlotsTest

        def make_with_annotations_and_method():
            @dataclass(slots=True)
            class SlotsTest:
                x: int

                def method(self) -> int:
                    return self.x

            return SlotsTest

        def make_with_forwardref():
            @dataclass(slots=True)
            class SlotsTest:
                x: undefined
                y: list[undefined]

            return SlotsTest

        for make in (make_simple, make_with_annotations, make_with_annotations_and_method, make_with_forwardref):
            with self.subTest(make=make):
                C = make()
                support.gc_collect()
                candidates = [cls for cls in object.__subclasses__() if cls.__name__ == 'SlotsTest'
                              and cls.__firstlineno__ == make.__code__.co_firstlineno + 1]
                self.assertEqual(candidates, [C])


class TestDescriptors(unittest.TestCase):