def test_matches(self):
d1 = Domino(2, 3)
d2 = Domino(5, 6)
d3 = Domino(3, 5)
self.assertFalse(d1.matches(d2))
self.assertFalse(d2.matches(d1))
self.assertTrue(d1.matches(d3))
self.assertTrue(d3.matches(d1))
self.assertTrue(d2.matches(d3))
self.assertTrue(d3.matches(d2))
