'If a delayed call is scheduled and then some time passes, the
timeout passed to C{doIteration} is reduced by the amount of time
which passed.'

def test_timePasses(self):

    reactor = TimeoutReportReactor()
    reactor.callLater(100, (lambda : None))
    reactor.now += 25
    timeout = self._checkIterationTimeout(reactor)
    self.assertEqual(timeout, 75)
