assertTrue(revealed.getFirst().isEmpty());
assertEquals(2, revealed.getSecond().size());
assertEquals(news1.getId(), revealed.getSecond().get(0));
assertEquals(news3.getId(), revealed.getSecond().get(1));
revealed = model.revealPage(news3.getId(), 5);
assertTrue(revealed.getFirst().isEmpty());
assertEquals(news1.getId(), revealed.getSecond().get(0));
model.setNewsVisible(news1, false);
model.setNewsVisible(news3, false);