'If there is a delayed call, C{doIteration} is called with a timeout
which is the difference between the current time and the time at
which that call is to run.'

def test_delayedCall(self):

    reactor = TimeoutReportReactor()
    reactor.callLater(100, (lambda : None))
    timeout = self._checkIterationTimeout(reactor)
    self.assertEqual(timeout, 100)
