def play(self, domino: Domino) -> bool:
"""
Add a domino to the current train, updating internal state as necessary.
:param domino: the Domino to add
:return: a boolean indicating if the domino was added successfully
"""
if not domino.contains(self.requires):
return False
self.cars.append(domino)
self.requires = domino.get_other_number(self.requires)
self.demands_satisfaction = domino.is_double
return True
def test_other(self):
d = Domino(2, 3)
self.assertEqual(3, d.get_other_number(2))
self.assertEqual(2, d.get_other_number(3))
self.assertIsNone(d.get_other_number(42))