public void testCoordinatesDirection() {
   Assert.assertEquals(coor32x16y.direction(0), coor32x16y.up());
   Assert.assertEquals(coor32x16y.direction(1), coor32x16y.down());
   Assert.assertEquals(coor32x16y.direction(2), coor32x16y.left());
   Assert.assertEquals(coor32x16y.direction(3), coor32x16y.right());
 }
 public void testCoordinatesUp() {
   Assert.assertEquals(coor32x16y.up(), new Coordinates(32, 15));
 }