Method test_cannot_instantiate_abstract

Lib/test/test_typing.py:3038–3054

(self)

        self.assertEqual(c.x, 1)

    def test_cannot_instantiate_abstract(self):
        @runtime_checkable
        class P(Protocol):
            @abc.abstractmethod
            def ameth(self) -> int:
                raise NotImplementedError

        class B(P):
            pass

        class C(B):
            def ameth(self) -> int:
                return 26

        with self.assertRaises(TypeError):
            B()
        self.assertIsInstance(C(), P)

    def test_subprotocols_extending(self):
        class P1(Protocol):