@Test
public void testSimpleHash() {

  // Just a simple sanity check.
  final ColorRGBA clr1 = new ColorRGBA(1, 0, 0, 1);
  final ColorRGBA clr2 = new ColorRGBA(1, 0, 0, 1);
  final ColorRGBA clr3 = new ColorRGBA(1, 1, 1, 1);
  assertTrue(clr1.hashCode() == clr2.hashCode());
  assertTrue(clr1.hashCode() != clr3.hashCode());
}