def test_get_occurrence(self):
     reservation = Reservation(**self.recurring_data)
     reservation.save()
     occurrence = reservation.get_occurrence(datetime.datetime(2008, 1, 5, 8, 0))
     self.assertEqual(occurrence.start, datetime.datetime(2008,1,5,8))
     occurrence.save()
     occurrence = reservation.get_occurrence(datetime.datetime(2008, 1, 5, 8, 0))
     self.assertTrue(occurrence.pk is not None)