'When L{TimerService.startService} is called, it marks itself
as running, creates a L{task.LoopingCall} and starts it.'

def test_startService(self):

    self.timer.startService()
    self.assertTrue(self.timer.running, 'Service    is    started')
    self.assertIsInstance(self.timer._loop, task.LoopingCall)
    self.assertIdentical(self.clock, self.timer._loop.clock)
    self.assertTrue(self.timer._loop.running, 'LoopingCall    is    started')
