Method test_hash_eq

Lib/test/test_typing.py:9560–9578

(self)

            L[int, float]

    def test_hash_eq(self):
        self.assertEqual(len({Annotated[int, 4, 5], Annotated[int, 4, 5]}), 1)
        self.assertNotEqual(Annotated[int, 4, 5], Annotated[int, 5, 4])
        self.assertNotEqual(Annotated[int, 4, 5], Annotated[str, 4, 5])
        self.assertNotEqual(Annotated[int, 4], Annotated[int, 4, 4])
        self.assertEqual(
            {Annotated[int, 4, 5], Annotated[int, 4, 5], Annotated[T, 4, 5]},
            {Annotated[int, 4, 5], Annotated[T, 4, 5]}
        )
        # Unhashable `metadata` raises `TypeError`:
        a1 = Annotated[int, []]
        with self.assertRaises(TypeError):
            hash(a1)

        class A:
            __hash__ = None
        a2 = Annotated[int, A()]
        with self.assertRaises(TypeError):
            hash(a2)

    def test_instantiate(self):
        class C: