assertEquals(Integer.valueOf(30), cache.getIfPresent(2));
    fakeTicker.advance(1000, MILLISECONDS);
    assertEquals(null, cache.getIfPresent(0));
  }

  public void testExpireAfterWrite() {
    Cache<Integer, Integer> cache =
        CacheBuilder.newBuilder().expireAfterWrite(1000, MILLISECONDS).ticker(fakeTicker).build();

    cache.put(10, 100);
    cache.put(20, 200);
    cache.put(4, 2);