assertThat(cache.asMap().containsValue(2675)).isFalse();
  }

  // we are testing our implementation of Map.containsKey
  @SuppressWarnings("ContainsEntryAfterGetInteger")
  @Test
  public void asMap_containsKey() {
    Cache<Integer, Integer> cache =
        CacheBuilder.newBuilder().expireAfterWrite(20000, MILLISECONDS).ticker(fakeTicker).build();

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