'L{app.AppLogger.start} calls L{globalLogBeginner.addObserver}, and then
writes some messages about twistd and the reactor.'

def test_start(self):

    logger = app.AppLogger({})
    observer = self._makeObserver()
    logger._getLogObserver = (lambda : observer)
    logger.start(Componentized())
    self._checkObserver(observer)
