def test_move_right_yields_nothing(self):
     layout = [[1, 2, 3], [8, 4, 0], [7, 6, 5]]
     self.assertEqual(Mover.move_right(Tile()).layout, layout)
 def test_move_right_gives_a_board_with_a_square_in_the_left(self):
     layout = [[1, 2, 3], [8, 4, 0], [7, 6, 5]]
     self.assertEqual(Mover.move_right(Tile()).layout, layout)