// add an attribute that exists in the resolve parent, same value
SimpleAttributeSet sParent = new SimpleAttributeSet();
s.setResolveParent(sParent);
harness.check(s.getAttributeCount(), 2);
sParent.addAttribute("X2", "Y2");
harness.check(s.getAttributeCount(), 2);
sParent.addAttribute("X3", "Y3");
harness.check(s.getAttributeCount(), 2);
s.addAttribute("X2", "YY2");