def test_live_cell_with_more_than_three_live_neighbors_dies(self):
world = World((50, 50))
Cell(4, 6, world, initially_alive=True)
Cell(4, 5, world, initially_alive=True)
Cell(4, 4, world, initially_alive=True)
Cell(5, 6, world, initially_alive=True)
Cell(5, 4, world)
Cell(6, 6, world)
Cell(6, 5, world)
Cell(6, 4, world)
test_cell = Cell(5, 5, world, True)
self.assertFalse(test_cell.next())
def test_live_cell_with_two_live_neighbors_lives(self):
world = World((50, 50))
Cell(4, 6, world, initially_alive=True)
Cell(4, 5, world, initially_alive=True)
Cell(4, 4, world)
Cell(5, 6, world)
Cell(5, 4, world)
Cell(6, 6, world)
Cell(6, 5, world)
Cell(6, 4, world)
test_cell = Cell(5, 5, world, True)
self.assertTrue(test_cell.next())
def test_dead_cell_with_exactly_three_live_neighbors_becomes_alive(self):
world = World((50, 50))
Cell(4, 6, world, initially_alive=True)
Cell(4, 5, world, initially_alive=True)
Cell(4, 4, world, initially_alive=True)
Cell(5, 6, world)
Cell(5, 4, world)
Cell(6, 6, world)
Cell(6, 5, world)
Cell(6, 4, world)
test_cell = Cell(5, 5, world)
self.assertTrue(test_cell.next())
def test_can_progress_cell_to_next_generation(self):
world = World((50, 50))
Cell(4, 6, world, initially_alive=True)
Cell(4, 5, world, initially_alive=True)
Cell(4, 4, world, initially_alive=True)
Cell(5, 6, world)
Cell(5, 4, world)
Cell(6, 6, world)
Cell(6, 5, world)
Cell(6, 4, world)
test_cell = Cell(5, 5, world)
self.assertTrue(test_cell.next())
self.assertFalse(test_cell.is_alive)
test_cell.step()
self.assertIsNone(test_cell._next)
self.assertTrue(test_cell.is_alive)
