assertEquals(2, revealed.getSecond().size());
assertEquals(news3.getId(), revealed.getSecond().get(0));
assertEquals(news4.getId(), revealed.getSecond().get(1));
assertEquals(1, model.indexOfNewsItem(news1.getId()));
assertEquals(2, model.indexOfNewsItem(news2.getId()));
assertEquals(3, model.indexOfNewsItem(news3.getId()));
assertEquals(5, model.indexOfNewsItem(news4.getId()));
assertEquals(6, model.indexOfNewsItem(news5.getId()));
model.setGroupExpanded(group1.getId(), false);
assertEquals(0, model.getVisibleUnreadNews().size());