'``in_parallel`` with only ``NoOp`` sub-changes becomes a ``NoOp`` with
sleep set to the minimum value of the sub-changes\' sleep
attribute.'

def test_noops(self):

    self.assertEqual(in_parallel(changes=[NoOp(sleep=timedelta(seconds=0.3)), NoOp(sleep=timedelta(seconds=0.1)), NoOp(sleep=timedelta(seconds=0.2))]), NoOp(sleep=timedelta(seconds=0.1)))
