def test_beacon(self):
game = GameOfLife()
initial_cells = [
'0, 0', '0, -1', '1, 0', '1, -1', '-1, 1', '-1, 2', '-2, 1',
'-2, 2'
]
self.assertEqual(initial_cells.sort(),
game.next(game.next(initial_cells)).sort())
def test_return_living_cells_only_once(self):
game = GameOfLife()
next_cells = game.next(['0, 0', '1, 1', '0, -1', '-1, 1'])
self.assertEqual(len([c for c in next_cells if c == '0, 0']), 1)
def test_another_cell_borns_with_three_neighbors(self):
game = GameOfLife()
initial_cells = ['10, 10', '11, 10', '10, 11']
self.assertTrue('11, 11' in game.next(initial_cells))
def test_cell_with_more_neighbors_die_of_overpopulation(self):
game = GameOfLife()
initial_cells = ['0, 0', '1, 0', '0, 1', '-1, 0', '0, -1']
self.assertFalse('0, 0' in game.next(initial_cells))
def test_origo_borns_if_three_neighbors(self):
game = GameOfLife()
initial_cells = ['1, 1', '0, -1', '-1, 1']
self.assertTrue('0, 0' in game.next(initial_cells))
def test_cell_with_two_neighbors_below_and_above_stays_alive(self):
game = GameOfLife()
initial_cells = ['0, 0', '-1, 0', '1, 0']
self.assertTrue('0, 0' in game.next(initial_cells))
def test_cell_with_three_neighbors_stays_alive(self):
game = GameOfLife()
initial_cells = ['0, 0', '-1, 0', '1, 0', '0, 1']
self.assertTrue('0, 0' in game.next(initial_cells))
def test_cells_with_no_immediate_neighbors_die(self):
game = GameOfLife()
next_cells = game.next(['0, 0', '0, 1', '0, 2', '0, 4'])
self.assertTrue('0, 1' in next_cells and '0, 2' not in next_cells)
def test_cell_with_two_neighbors_in_other_corner_stays_alive(self):
game = GameOfLife()
initial_cells = ['0, 0', '-1, 1', '1, -1']
self.assertEqual(game.next(initial_cells), ['0, 0'])
def test_all_but_periferial_cells_stay_alive_in_row(self):
game = GameOfLife()
next_cells = game.next(['0, 0', '0, 1', '0, 2', '0, 3', '0, 4'])
self.assertTrue('0, 1' in next_cells and '0, 2' in next_cells
and '0, 3' in next_cells)
def test_middle_cell_in_row_stays_alive(self):
game = GameOfLife()
initial_cells = ['0, 0', '0, 1', '0, 2']
self.assertTrue('0, 1' in game.next(initial_cells))
def test_next_returns_living_cells(self):
game = GameOfLife()
self.assertEqual(game.next([]), [])
def test_next_operates_on_list_of_living_cells(self):
game = GameOfLife()
game.next([])
def test_next_method_exists(self):
game = GameOfLife()
game.next()