Method test_all_new_methods_are_called

Lib/test/test_abc.py:482–494

(self)

            self.assertNotIsSubclass(C, (A,))

        def test_all_new_methods_are_called(self):
            class A(metaclass=abc_ABCMeta):
                pass
            class B(object):
                counter = 0
                def __new__(cls):
                    B.counter += 1
                    return super().__new__(cls)
            class C(A, B):
                pass
            self.assertEqual(B.counter, 0)
            C()
            self.assertEqual(B.counter, 1)

        def test_ABC_has___slots__(self):
            self.assertHasAttr(abc.ABC, '__slots__')