test_final.py 文件源码

 复制代码def test_final_classmethod(self):

        class ClassWithClassMethod(with_metaclass(FinalMeta, object)):
            count = 0

            @final
            @classmethod
            def f(cls):
                cls.count += 1
                return cls.count

        with self.assertRaises(TypeError):
            class ClassOverridingClassMethod(ClassWithClassMethod):
                @classmethod
                def f(cls):
                    return "Oh Noes!"

        with self.assertRaises(TypeError):
            ClassWithClassMethod.f = lambda cls: 0

        self.assertEqual(ClassWithClassMethod.f(), 1)
        self.assertEqual(ClassWithClassMethod.f(), 2)
        self.assertEqual(ClassWithClassMethod.f(), 3)

        instance = ClassWithClassMethod()

        with self.assertRaises(TypeError):
            instance.f = lambda cls: 0

        self.assertEqual(ClassWithClassMethod.f(), 4)
        self.assertEqual(ClassWithClassMethod.f(), 5)
        self.assertEqual(ClassWithClassMethod.f(), 6)