def test_direction(self):
world_center = Point((WORLD_SIZE // 2, WORLD_SIZE // 2))
snake = Snake(start=world_center, start_length=6)
self.assertEqual(snake.get_head(), world_center)
snake.change_direction(DIRECTION_LEFT)
snake.timer = 0
snake.update()
# opposite direction changes nothing
self.assertEqual(snake.get_head(), world_center+DIRECTION_RIGHT)
# no changes in the scales
self.assertFalse(snake.update())
def test_grow(self):
"""
Test growing does this.
0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 -> 0 0 0 0 0 0
0 1 1 1 0 0 0 1 1 1 1 0
0 0 0 0 0 0 0 0 0 0 0 0
"""
world_center = Point((WORLD_SIZE // 2, WORLD_SIZE // 2))
start_length = 5
snake = Snake(start=world_center, start_length=start_length, growth_pending=1)
snake.grow()
self.assertEqual(snake.speed, SNAKE_SPEED_INITIAL+SNAKE_SPEED_INCREMENT)
snake.timer = 0
snake.update()
self.assertEqual(len(snake), start_length+1)
def test_crash(self):
"""
Tests the following crash:
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 1 0 0 0 0 1 1 0
1 1 1 1 1 0 -> 0 1 1 1 1 0 -> 0 0 1 1 1 0 -> 0 0 0 2 1 0 <--- overlap
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 at 2
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
"""
world_center = Point((WORLD_SIZE // 2, WORLD_SIZE // 2))
snake = Snake(start=world_center, start_length=6)
self.assertFalse(snake.self_intersecting())
snake.change_direction(DIRECTION_UP)
snake.timer = 0
snake.update()
self.assertFalse(snake.self_intersecting())
snake.change_direction(DIRECTION_LEFT)
snake.timer = 0
snake.update()
self.assertFalse(snake.self_intersecting())
snake.change_direction(DIRECTION_DOWN)
snake.timer = 0
snake.update()
self.assertTrue(snake.self_intersecting())