def test_a_cell_with_2or3_neighbours_stays_alive_after_tick(self):
my_board = Board([self.fst_cell, self.snd_cell, self.trd_cell, self.fourth_cell])
my_board.tick()
self.assertTrue(my_board.cell_alive_at(6, 6))
self.assertTrue(my_board.cell_alive_at(5, 6))
self.assertTrue(my_board.cell_alive_at(5, 7))
self.assertTrue(my_board.cell_alive_at(6, 7))
def test_a_cell_without_neighbours_dies_after_tick(self):
dying_cell = Cell(4, 4)
my_board = Board([self.fst_cell, self.snd_cell, self.trd_cell, dying_cell])
my_board.tick()
self.assertFalse(my_board.cell_alive_at(4, 4))
self.assertTrue(my_board.cell_alive_at(6, 6))
self.assertTrue(my_board.cell_alive_at(5, 6))
self.assertTrue(my_board.cell_alive_at(5, 7))
def test_a_died_cell_with_3_alive_neighbours_resurrects(self):
my_board = Board([self.fst_cell, self.snd_cell, self.trd_cell])
my_board.tick()
self.assertTrue(my_board.cell_alive_at(6, 6))
self.assertTrue(my_board.cell_alive_at(5, 6))
self.assertTrue(my_board.cell_alive_at(5, 7))
# Having 3 alive neighbours comes back to life.
self.assertTrue(my_board.cell_alive_at(6, 7))
def test_a_cell_with_more_then_3_neighbours_dies(self):
my_board = Board([self.fst_cell, self.snd_cell,
self.trd_cell, self.fourth_cell, self.fifth_cell])
my_board.tick()
# dying cells: first and fifth.
self.assertFalse(my_board.cell_alive_at(6, 6))
self.assertFalse(my_board.cell_alive_at(7, 5))
self.assertTrue(my_board.cell_alive_at(5, 6))
self.assertTrue(my_board.cell_alive_at(5, 7))
self.assertTrue(my_board.cell_alive_at(6, 7))
def test_acceptance_different_generations(self):
# simple spaceship pattern
first = Cell(5, 5)
second = Cell(6, 5)
third = Cell(6, 6)
fourth = Cell(7, 5)
my_board = Board([first, second, third, fourth])
# First generation
# cells: (5, 5), (6, 5), (6, 6), (7, 5)
# and these new borns (6, 4), (5, 6), (7, 6)
my_board.tick()
self.assertTrue(my_board.cell_alive_at(5, 5))
self.assertTrue(my_board.cell_alive_at(6, 5))
self.assertTrue(my_board.cell_alive_at(6, 6))
self.assertTrue(my_board.cell_alive_at(7, 5))
self.assertTrue(my_board.cell_alive_at(6, 4))
self.assertTrue(my_board.cell_alive_at(5, 6))
self.assertTrue(my_board.cell_alive_at(7, 6))
# Second generation
# dying cells: (5, 5), (6, 5), (6, 6), (7, 5)
# new borns: (5, 4), (6, 7), (7, 4)
# alive cells: (5, 4), (6, 7), (7, 4), (5, 6),
# (6, 4), (7, 6)
my_board.tick()
self.assertFalse(my_board.cell_alive_at(5, 5))
self.assertFalse(my_board.cell_alive_at(6, 5))
self.assertFalse(my_board.cell_alive_at(6, 6))
self.assertFalse(my_board.cell_alive_at(7, 5))
self.assertTrue(my_board.cell_alive_at(5, 4))
self.assertTrue(my_board.cell_alive_at(6, 7))
self.assertTrue(my_board.cell_alive_at(7, 4))
self.assertTrue(my_board.cell_alive_at(5, 6))
self.assertTrue(my_board.cell_alive_at(6, 4))
self.assertTrue(my_board.cell_alive_at(7, 6))
# Third generation:
# dying cells: (5, 4), (5, 6), (7, 4), (7, 6)
# new borns: (5, 5), (6, 3), (6, 6), (7, 5)
# alive cells: (5, 5), (6, 3), (6, 6), (7, 5),
# (6, 4), (6, 7)
my_board.tick()
self.assertFalse(my_board.cell_alive_at(5, 4))
self.assertFalse(my_board.cell_alive_at(5, 6))
self.assertFalse(my_board.cell_alive_at(7, 4))
self.assertFalse(my_board.cell_alive_at(7, 6))
self.assertTrue(my_board.cell_alive_at(5, 5))
self.assertTrue(my_board.cell_alive_at(6, 3))
self.assertTrue(my_board.cell_alive_at(6, 6))
self.assertTrue(my_board.cell_alive_at(7, 5))
self.assertTrue(my_board.cell_alive_at(6, 4))
self.assertTrue(my_board.cell_alive_at(6, 7))