test_abc.py 文件源码

def test_abstractproperty_basics(self):
        @property
        @abc.abstractmethod
        def foo(self): pass
        self.assertTrue(foo.__isabstractmethod__)
        def bar(self): pass
        self.assertFalse(getattr(bar, "__isabstractmethod__", False))

        class C(metaclass=abc.ABCMeta):
            @property
            @abc.abstractmethod
            def foo(self): return 3
        self.assertRaises(TypeError, C)
        class D(C):
            @C.foo.getter
            def foo(self): return super().foo
        self.assertEqual(D().foo, 3)