def test_default_initialization(self):
p1 = IntegerPoint()
self.assertTupleEqual(p1.tuple(), (0, 0))
def test_tuple(self):
p1 = IntegerPoint(0, 1)
p2 = IntegerPoint(1, 1)
res = IntegerSegment(p1, p2)
self.assertTupleEqual(res.tuple(), (p1.tuple(), p2.tuple()))
