@Override
    public String toString() {
        StringBuilder stringBuilder = new StringBuilder();
        stringBuilder.append("x=");
        stringBuilder.append(this.tileX);
        stringBuilder.append(", y=");
        stringBuilder.append(this.tileY);
        stringBuilder.append(", z=");
        stringBuilder.append(this.zoomLevel);
        return stringBuilder.toString();
    }
@Test
    public void toStringTest() {
        Tile tile = new Tile(1, 2, (byte) 3, TILE_SIZE);
        Assert.assertEquals(TILE_TO_STRING, tile.toString());
    }