test_defer.py 文件源码

def testNoDebugging(self):
        defer.setDebugging(False)
        d = defer.Deferred()
        d.addCallbacks(self._callback, self._errback)
        self._call_1(d)
        try:
            self._call_2(d)
        except defer.AlreadyCalledError as e:
            self.assertFalse(e.args)
        else:
            self.fail("second callback failed to raise AlreadyCalledError")