def test_neighbours():
game = Life()
neighbours = ((-1, -1), (-1, 0), (-1, 1), (0, 1), (1, 1), (1, 0), (1, -1),
(0, -1))
assert len(neighbours) == len(list(game.neighbours((0, 0))))
assert sorted(neighbours) == sorted(list(game.neighbours((0, 0))))
def test_over_population_death():
for count in range(4, 8):
game = Life()
game.set_living((0, 0))
neighbour = game.neighbours((0, 0))
for i in range(0, count):
game.set_living(neighbour.next())
assert game.is_alive((0, 0))
game.tick()
assert not game.is_alive((0, 0))
def test_invalid_neighbours():
game = Life()
with pytest.raises(TypeError):
list(game.neighbours((True, True)))