public void TestAreNotValidNeighbours()
        {
            Tile emptyTile   = new Tile(string.Empty, 3);
            Tile currentTile = new Tile("12", 5);

            Assert.IsFalse(MatrixGenerator.AreValidNeighbours(emptyTile, currentTile), "Empty tile are not neighbours.");
        }
        public void TestAreValidNeighboursRight()
        {
            Tile emptyTile   = new Tile(string.Empty, 7);
            Tile currentTile = new Tile("12", 6);

            Assert.IsTrue(MatrixGenerator.AreValidNeighbours(emptyTile, currentTile), "Empty tile are not neighbours.");
        }