public void testCloning() {
        ColorPalette p1 = new GreyPalette();
        ColorPalette p2 = null;
        try {
            p2 = (ColorPalette) p1.clone();
        }
        catch (CloneNotSupportedException e) {
            System.err.println("Failed to clone.");
        }
        assertTrue(p1 != p2);
        assertTrue(p1.getClass() == p2.getClass());
        assertTrue(p1.equals(p2));