def test_noCanceller(self):
        d = defer.Deferred()
        d.addCallbacks(self._callback, self._errback)
        d.cancel()
        self.assertEquals(self.errbackResults.type, defer.CancelledError)
        self.assertEquals(self.callbackResults, None)
A L{defer.Deferred} without a canceller must errback with a
dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/test/test_defer.py/DeferredCancellerTest.test_noCanceller