test_fileinput.py 文件源码

def test_state_is_not_None(self):
        """Tests that fileinput.close() invokes close() on fileinput._state
           and sets _state=None"""
        instance = MockFileInput()
        fileinput._state = instance
        fileinput.close()
        self.assertExactlyOneInvocation(instance, "close")
        self.assertIsNone(fileinput._state)