Method test_subclasshook

Lib/test/test_abc.py:464–480

(self)

                issubclass(int, S)

        def test_subclasshook(self):
            class A(metaclass=abc.ABCMeta):
                @classmethod
                def __subclasshook__(cls, C):
                    if cls is A:
                        return 'foo' in C.__dict__
                    return NotImplemented
            self.assertNotIsSubclass(A, A)
            self.assertNotIsSubclass(A, (A,))
            class B:
                foo = 42
            self.assertIsSubclass(B, A)
            self.assertIsSubclass(B, (A,))
            class C:
                spam = 42
            self.assertNotIsSubclass(C, A)
            self.assertNotIsSubclass(C, (A,))

        def test_all_new_methods_are_called(self):
            class A(metaclass=abc_ABCMeta):