def test_reversed_tiles(self):
# Test row swaps
init_tile = np.array([[1, 2, 3], [4, 6, 5], [8, 7, 0]])
goal_tile = np.array([[1, 2, 3], [4, 5, 6], [7, 8, 0]])
init = State(init_tile, 0, 0)
goal = State(goal_tile, 0, 0)
self.assertEqual(init.tile_reversals(goal), 2)
# Test column swaps
init_tile = np.array([[1, 2, 6], [4, 8, 3], [7, 5, 0]])
goal_tile = np.array([[1, 2, 3], [4, 5, 6], [7, 8, 0]])
init = State(init_tile, 0, 0)
goal = State(goal_tile, 0, 0)
self.assertEqual(init.tile_reversals(goal), 2)
# Test both
init_tile = np.array([[1, 2, 6], [4, 5, 3], [8, 7, 0]])
goal_tile = np.array([[1, 2, 3], [4, 5, 6], [7, 8, 0]])
init = State(init_tile, 0, 0)
goal = State(goal_tile, 0, 0)
self.assertEqual(init.tile_reversals(goal), 2)
