Class C

Lib/test/test_abc.py:76–79

        def test_ABC_helper(self):
            # create an ABC using the helper class and perform basic checks
            class C(abc.ABC):
                @classmethod
                @abc.abstractmethod
                def foo(cls): return cls.__name__
            self.assertEqual(type(C), abc.ABCMeta)
            self.assertRaises(TypeError, C)
            class D(C):