assertThat(cache.asMap().containsKey(2)).isFalse();
    assertThat(cache.asMap().containsKey(654)).isTrue();
    assertThat(cache.asMap().containsKey(2456)).isTrue();
  }

  @Test
  public void asMap_containsValue() {
    Cache<Integer, Integer> cache =
        CacheBuilder.newBuilder().expireAfterWrite(20000, MILLISECONDS).ticker(fakeTicker).build();

    cache.put(654, 2675);
    fakeTicker.advance(10000, MILLISECONDS);