Method test_abstractmethod_integration

Lib/test/test_abc.py:172–198

(self)

        @unittest.expectedFailure  # TODO: RUSTPYTHON; AssertionError: False is not true
        def test_abstractmethod_integration(self):
            for abstractthing in [abc.abstractmethod, abc.abstractproperty,
                                  abc.abstractclassmethod,
                                  abc.abstractstaticmethod]:
                class C(metaclass=abc_ABCMeta):
                    @abstractthing
                    def foo(self): pass  # abstract
                    def bar(self): pass  # concrete
                self.assertEqual(C.__abstractmethods__, {"foo"})
                self.assertRaises(TypeError, C)  # because foo is abstract
                self.assertTrue(isabstract(C))
                class D(C):
                    def bar(self): pass  # concrete override of concrete
                self.assertEqual(D.__abstractmethods__, {"foo"})
                self.assertRaises(TypeError, D)  # because foo is still abstract
                self.assertTrue(isabstract(D))
                class E(D):
                    def foo(self): pass
                self.assertEqual(E.__abstractmethods__, set())
                E()  # now foo is concrete, too
                self.assertFalse(isabstract(E))
                class F(E):
                    @abstractthing
                    def bar(self): pass  # abstract override of concrete
                self.assertEqual(F.__abstractmethods__, {"bar"})
                self.assertRaises(TypeError, F)  # because bar is abstract now
                self.assertTrue(isabstract(F))

        def test_descriptors_with_abstractmethod(self):
            class C(metaclass=abc_ABCMeta):