        s = SemesterFactory().semesters['s16']
        d = datetime.strptime("2016-02-15", '%Y-%m-%d')
        self.assertEqual(s.getWeek(d), 6, "expecting 6 got {}".format(s.getWeek(d)))
        delta = timedelta(days=7)
        d = d + delta
        self.assertEqual(s.getWeek(d), 7, "expecting 7 got {}".format(s.getWeek(d)))
        delta = timedelta(days=-14)