Method test_optional_issubclass

Lib/test/test_typing.py:2075–2081

(self)

            issubclass(int, Union[list[int], str])

    def test_optional_issubclass(self):
        self.assertIsSubclass(int, Optional[int])
        self.assertIsSubclass(type(None), Optional[int])
        self.assertNotIsSubclass(str, Optional[int])
        self.assertIsSubclass(Any, Optional[Any])
        self.assertIsSubclass(type(None), Optional[Any])
        self.assertNotIsSubclass(int, Optional[Any])

    def test_optional_issubclass_type_error(self):
        with self.assertRaises(TypeError):