def test_two_exits_from_one_turf(self):
a, b, c = Turf(), Turf(), Turf()
a.add_exit((0, 1), b)
a.add_exit((1, 0), c)
self.assertEqual(a.exits[(0, 1)], b)
self.assertEqual(a.exits[(1, 0)], c)
self.assertEqual(len(a.exits), 2)
def test_add_one_directional_exit(self):
dx, dy = (1, 0)
a, b = Turf(), Turf()
a.add_exit((dx, dy), b)
self.assertEqual(a.exits[(dx, dy)], b)
self.assertEqual(len(a.exits), 1)
with self.assertRaises(KeyError):
b.exits[(-dx, -dy)]
def test_add_bidirectional_exit(self):
dx, dy = (1, 0)
a, b = Turf(), Turf()
a.add_exit((dx, dy), b)
b.add_exit((-dx, -dy), a)
self.assertEqual(a.exits[(dx, dy)], b)
self.assertEqual(len(a.exits), 1)
self.assertEqual(b.exits[(-dx, -dy)], a)
self.assertEqual(len(b.exits), 1)
def test_only_specific_deltas_are_permitted(self):
invalid_deltas = [(9, 0), (0, 0), ('potato', 'tomato')]
a, b = Turf(), Turf()
for dx, dy in invalid_deltas:
with self.assertRaises(Turf.InvalidExitDelta):
a.add_exit((dx, dy), b)
