Method test_generic_pep585_forward_ref

Lib/test/test_typing.py:5195–5232

(self)

        self.assertIs(get_type_hints(barfoo2, globals(), locals())['x'], CT)

    def test_generic_pep585_forward_ref(self):
        # See https://bugs.python.org/issue41370

        class C1:
            a: list['C1']
        self.assertEqual(
            get_type_hints(C1, globals(), locals()),
            {'a': list[C1]}
        )

        class C2:
            a: dict['C1', list[List[list['C2']]]]
        self.assertEqual(
            get_type_hints(C2, globals(), locals()),
            {'a': dict[C1, list[List[list[C2]]]]}
        )

        # Test stringified annotations
        scope = {}
        exec(textwrap.dedent('''
        from __future__ import annotations
        class C3:
            a: List[list["C2"]]
        '''), scope)
        C3 = scope['C3']
        self.assertEqual(C3.__annotations__['a'], "List[list['C2']]")
        self.assertEqual(
            get_type_hints(C3, globals(), locals()),
            {'a': List[list[C2]]}
        )

        # Test recursive types
        X = list["X"]
        def f(x: X): ...
        self.assertEqual(
            get_type_hints(f, globals(), locals()),
            {'x': list[list[EqualToForwardRef('X')]]}
        )

    def test_pep695_generic_class_with_future_annotations(self):
        original_globals = dict(ann_module695.__dict__)