CacheBuilder.newBuilder().expireAfterAccess(Duration.ofHours(1));
    assertThrows(IllegalStateException.class, () -> builder.expireAfterAccess(Duration.ofHours(1)));
  }

  public void testTimeToIdleAndToLive() {
    LoadingCache<?, ?> unused =
        CacheBuilder.newBuilder()
            .expireAfterWrite(1, NANOSECONDS)
            .expireAfterAccess(1, NANOSECONDS)
            .build(identityLoader());