public void testPropertyAddHour() {
        Partial test = new Partial(TYPES, VALUES);
        Partial copy = test.property(DateTimeFieldType.hourOfDay()).addToCopy(9);
        check(test, 10, 20, 30, 40);
        check(copy, 19, 20, 30, 40);
        
        copy = test.property(DateTimeFieldType.hourOfDay()).addToCopy(0);
        check(copy, 10, 20, 30, 40);
        
        copy = test.property(DateTimeFieldType.hourOfDay()).addToCopy(13);
        check(copy, 23, 20, 30, 40);
        
        try {
            test.property(DateTimeFieldType.hourOfDay()).addToCopy(14);
            fail();
        } catch (IllegalArgumentException ex) {}
        check(test, 10, 20, 30, 40);
        
        copy = test.property(DateTimeFieldType.hourOfDay()).addToCopy(-10);
        check(copy, 0, 20, 30, 40);
        
        try {
            test.property(DateTimeFieldType.hourOfDay()).addToCopy(-11);
            fail();
        } catch (IllegalArgumentException ex) {}
        check(test, 10, 20, 30, 40);
    }