test_task.py 文件源码

def test_deferredDeprecation(self):
        """
        L{LoopingCall.deferred} is deprecated.
        """
        loop = task.LoopingCall(lambda: None)

        loop.deferred

        message = (
                'twisted.internet.task.LoopingCall.deferred was deprecated in '
                'Twisted 16.0.0; '
                'please use the deferred returned by start() instead'
                )
        warnings = self.flushWarnings([self.test_deferredDeprecation])
        self.assertEqual(1, len(warnings))
        self.assertEqual(DeprecationWarning, warnings[0]['category'])
        self.assertEqual(message, warnings[0]['message'])