def test_swapping_adds_to_tile_history(self):
tile = Tile()
tile.history = [[[1, 2, 3], [8, 0, 4], [7, 6, 5]]]
tile.layout = [[1, 2, 3], [8, 4, 0], [7, 6, 5]]
expected = [[[1, 2, 3], [8, 0, 4], [7, 6, 5]],
[[1, 2, 3], [8, 4, 0], [7, 6, 5]]]
self.assertEqual(
Tile.swap(Tile.duplicate(tile), 0, 2, 1, 2).history, expected)
def test_displaced_tiles_yields_two(self):
tile = Mover.move_left(Tile.duplicate(self.tile))
tile = Mover.move_up(tile)
self.assertEqual(self.metrics.displaced(tile), 2)
def move_horizontally(tile, direction, rowIndex, squareIndex):
if (squareIndex == direction + 1):
return None
return Tile.swap(Tile.duplicate(tile), rowIndex,
squareIndex + direction, rowIndex, squareIndex)
