public void testTimeToLive_setTwice_duration() {
    CacheBuilder<Object, Object> builder =
        CacheBuilder.newBuilder().expireAfterWrite(Duration.ofHours(1));
    assertThrows(IllegalStateException.class, () -> builder.expireAfterWrite(Duration.ofHours(1)));
  }

  public void testTimeToIdle_negative() {
    CacheBuilder<Object, Object> builder = CacheBuilder.newBuilder();