def test_polish_interval_tuple(self):
st, end = _polish_interval((1, 2))
self.assertEquals(st, 1)
self.assertEquals(end, 2)
def test_polish_interval_point(self):
st, end = _polish_interval(1)
self.assertEquals(st, 1)
self.assertEquals(end, 2)
def test_polish_interval_empty(self):
res = _polish_interval(())
self.assertTrue(res is None)