@Test
public void testRandomColor() {

  final ColorRGBA clr1 = new ColorRGBA(0, 0, 0, 0);
  MathUtils.setRandomSeed(0);
  ColorRGBA.randomColor(clr1);
  assertEquals(new ColorRGBA(0.73096776f, 0.831441f, 0.24053639f, 1.0f), clr1);
  final ColorRGBA clr2 = ColorRGBA.randomColor(null);
  assertEquals(new ColorRGBA(0.6063452f, 0.6374174f, 0.30905056f, 1.0f), clr2);
}