'When the C{logger} key is specified in the configuration dictionary
(i.e., when C{--logger} is passed to twistd), the initial log observer
will be the log observer returned from the callable which the value
refers to in FQPN form.'

def test_startUsesConfiguredLogObserver(self):

    application = Componentized()
    self._checkObserver(self._setupConfiguredLogger(application))
