public void testListAddReplacing() { ListOrderedSet set = (ListOrderedSet) makeEmptySet(); A a = new A(); B b = new B(); set.add(a); assertEquals(1, set.size()); set.add(b); // will match but not replace A as equal assertEquals(1, set.size()); assertSame(a, set.getSet().iterator().next()); assertSame(a, set.iterator().next()); assertSame(a, set.get(0)); assertSame(a, set.asList().get(0)); }