def test_dead_cells_with_more_than_three_live_neighbors_should_stay_dead():
zeroGen = init(6, 6, [(1, 1), (1, 3), (2, 1), (2, 2), (2, 3)])
fGen = nextGen(zeroGen)
assert fGen[0][1] == 0
def test_dead_cells_with_exactly_three_live_neighbors_should_become_alive():
zeroGen = init(6, 6, [(1, 2), (2, 1), (2, 2)])
fGen = nextGen(zeroGen)
assert fGen[0][0] == 1
def test_live_cells_with_two_live_neighbors_should_stay_alive():
zeroGen = init(4, 8, [(2, 1), (3, 1), (3, 2)])
fGen = nextGen(zeroGen)
assert fGen[2][0] == 1
def test_live_cells_with_more_then_three_neighbors_should_die():
zeroGen = init(4, 8, [(1, 5), (2, 3), (2, 4), (2, 5), (3, 3), (3, 4)])
fGen = nextGen(zeroGen)
assert fGen[2][3] == 0
assert fGen[1][3] == 0
def test_live_cells_with_less_then_two_neighbors_should_die():
zeroGen = init(4, 8, [(2, 2), (2, 7), (3, 6)])
fGen = nextGen(zeroGen)
assert fGen[1][1] == 0
assert fGen[1][6] == 0
def test_sample_next_gen():
exp = [[0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 1, 1, 0, 0, 0],
[0, 0, 0, 1, 1, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0]]
zeroGen = init(4, 8, [(2, 4), (3, 4), (3, 5)])
nGen = nextGen(zeroGen)
assert exp == nGen