def test_period_next(self):
extents = Extents(local_datetime(2014, 6, 18, 11, 11, 11), period="week")
self.assertEquals(extents.next(), local_datetime(2014, 6, 26))
extents = Extents(local_datetime(2014, 6, 25, 11, 11), period="week")
self.assertEquals(extents.next(), local_datetime(2014, 7, 3))
extents = Extents(local_datetime(2015, 4, 14, 11, 11), period="week")
self.assertEquals(extents.next(), local_datetime(2015, 4, 23))
