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_reproduction():
game = Life()
game.set_living((0, 0))
game.set_living((0, 1))
game.set_living((0, -1))
game.tick()
assert game.is_alive((1, 0))
assert game.is_alive((-1, 0))
def test_count_living_neighbours():
game = Life()
assert game.count_living_neighbours((0, 0)) == 0
game.set_living((0, 1))
assert game.count_living_neighbours((0, 0)) == 1
game.set_living((1, 1))
assert game.count_living_neighbours((0, 0)) == 2
assert game.count_living_neighbours((0, 1)) == 1
assert game.count_living_neighbours((1, 1)) == 1
def test_stable_block_tick():
game = Life()
game.set_living((0, 0))
game.set_living((0, 1))
game.set_living((1, 0))
game.set_living((1, 1))
assert len(list(game.living)) == 4
game.tick()
assert len(list(game.living)) == 4
game.tick()
assert len(list(game.living)) == 4
def test_under_population_death():
game = Life()
game.set_living((0, 0))
assert game.is_alive((0, 0))
game.tick()
assert len(list(game.living)) == 0
game.tick()
assert len(list(game.living)) == 0
def test_set_living():
game = Life()
game.set_living((0, 0))
game.set_living((-1, -3))
game.set_living((3, 3))
assert (0, 0) in game.living
assert (-1, -3) in game.living
assert (3, 3) in game.living
def test_empty_tick():
game = Life()
assert len(list(game.living)) == 0
game.tick()
assert len(list(game.living)) == 0
game.tick()
assert len(list(game.living)) == 0
def test_repeated_set_living():
game = Life()
assert (0, 0) not in game.living
game.set_living((0, 0))
assert (0, 0) in game.living
game.set_living((0, 0))
assert (0, 0) in game.living
def test_under_population_death_one_neighbour():
game = Life()
game.set_living((0, 0))
game.set_living((0, 1))
assert len(list(game.living)) == 2
game.tick()
assert len(list(game.living)) == 0
def test_non_integer_set_living():
game = Life()
with pytest.raises(TypeError):
game.set_living((True, True))
with pytest.raises(TypeError):
game.set_living(('test', 'test'))
assert (True, True) not in game.living
assert ('test', 'test') not in game.living
def test_non_integer_set_dead():
# Technically nothing bad could happen by them calling set_dead with something invalid anyway --- since it could never exist in the set as set_living checks it is valid. It seems better to explicitly throw an exception, however, so that if an accidental mistake was made, it could be caught early.
game = Life()
with pytest.raises(TypeError):
game.set_dead((True, True))
with pytest.raises(TypeError):
game.set_dead(('test', 'test'))
assert (True, True) not in game.living
assert ('test', 'test') not in game.living
def test_spinning():
game = Life()
game.set_living((0, 0))
game.set_living((-1, 0))
game.set_living((1, 0))
for i in range(0, 100):
game.tick()
assert game.is_alive((0, 0))
assert game.is_alive((0, 1))
assert game.is_alive((0, -1))
assert len(list(game.living)) == 3
game.tick()
assert game.is_alive((0, 0))
assert game.is_alive((-1, 0))
assert game.is_alive((1, 0))
assert len(list(game.living)) == 3
def test_check_initially_blank():
game = Life()
assert len(list(game.living)) == 0
def test_invalid_neighbours():
game = Life()
with pytest.raises(TypeError):
list(game.neighbours((True, True)))
def test_set_dead():
game = Life()
game.set_dead((0, 0))
assert not game.is_alive((0, 0))
game.set_living((0, 0))
assert game.is_alive((0, 0))
game.set_dead((0, 0))
assert not game.is_alive((0, 0))
def test_create_game():
assert Life()
def test_known_final_result():
"""Using "small exploder" pattern:
X10
111
101
010
Known to produce the pattern
00000010000000
00000101000000
00000101000000
00000010000000
00000000000000
01100X00000110
10010000001001
01100000000110
00000000000000
00000010000000
00000101000000
00000101000000
00000010000000
after 16 iterations. X used to mark reference point.
"""
game = Life()
# Initial pattern
game.set_living((1, 0))
game.set_living((0, 1))
game.set_living((1, 1))
game.set_living((2, 1))
game.set_living((0, 2))
game.set_living((2, 2))
game.set_living((1, 3))
for i in range(0, 17):
game.tick()
# Top pattern
assert game.is_alive((1, -5))
assert game.is_alive((0, -4))
assert game.is_alive((2, -4))
assert game.is_alive((0, -3))
assert game.is_alive((2, -3))
assert game.is_alive((1, -2))
# Left pattern
assert game.is_alive((-3, 0))
assert game.is_alive((-4, 0))
assert game.is_alive((-2, 1))
assert game.is_alive((-5, 1))
assert game.is_alive((-3, 2))
assert game.is_alive((-4, 2))
# Right pattern
assert game.is_alive((5, 0))
assert game.is_alive((6, 0))
assert game.is_alive((4, 1))
assert game.is_alive((7, 1))
assert game.is_alive((5, 2))
assert game.is_alive((6, 2))
# Bottom pattern
assert game.is_alive((1, 4))
assert game.is_alive((0, 5))
assert game.is_alive((2, 5))
assert game.is_alive((0, 6))
assert game.is_alive((2, 6))
assert game.is_alive((1, 7))
assert len(list(game.living)) == 24
def test_isolated_under_population():
game = Life()
game.set_living((0, 0))
game.set_living((2, 2))
game.set_living((2, 3))
game.set_living((2, 4))
assert len(list(game.living)) == 4
game.tick()
# In this case, we need to check specific spaces, since the number alive will change once the reproduction rule is implemented
assert not game.is_alive((0, 0))
assert not game.is_alive((2, 2))
assert not game.is_alive((2, 4))
assert game.is_alive((2, 3))
def test_reproduction_stable():
game = Life()
game.set_living((0, 0))
game.set_living((-1, 0))
game.set_living((-1, -1))
for i in range(0, 100):
game.tick()
assert game.is_alive((0, 0))
assert game.is_alive((-1, 0))
assert game.is_alive((-1, -1))
assert game.is_alive((0, -1))
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_over_population_isolated():
game = Life()
game.set_living((0, 0))
game.set_living((0, 1))
game.set_living((-1, 0))
game.set_living((1, 0))
game.set_living((-1, -1))
game.set_living((10, 10))
game.set_living((11, 10))
game.set_living((9, 10))
game.set_living((10, 11))
game.set_living((10, 9))
assert len(list(game.living)) == 10
game.tick()
assert not game.is_alive((0, 0))
assert not game.is_alive((10, 10))