'Verify that C{callResult} completes with a L{None} result and that an
unhandled error has been logged.'

def _localCallbackErrorLoggingTest(self, callResult):

    finalResult = []
    callResult.addBoth(finalResult.append)
    self.assertEqual(1, len(self.sender.unhandledErrors))
    self.assertIsInstance(self.sender.unhandledErrors[0].value, ZeroDivisionError)
    self.assertEqual([None], finalResult)
