}

  public void testLoad() throws ExecutionException {
    LoadingCache<Object, Object> cache =
        CacheBuilder.newBuilder().recordStats().build(identityLoader());
    CacheStats stats = cache.stats();
    assertThat(stats.missCount()).isEqualTo(0);
    assertThat(stats.loadSuccessCount()).isEqualTo(0);
    assertThat(stats.loadExceptionCount()).isEqualTo(0);

    cache.invalidateAll(toInvalidate);
    assertThat(invalidated).isEqualTo(toInvalidate);
  }

  public void testEmptySimpleStats() {
    StatsCounter counter = new SimpleStatsCounter();
    CacheStats stats = counter.snapshot();
    assertThat(stats.requestCount()).isEqualTo(0);
    assertThat(stats.hitCount()).isEqualTo(0);
    assertThat(stats.hitRate()).isEqualTo(1.0);
    assertThat(stats.missCount()).isEqualTo(0);

  }

  public void testLoad() throws ExecutionException {
    LoadingCache<Object, Object> cache =
        CacheBuilder.newBuilder().recordStats().build(identityLoader());
    CacheStats stats = cache.stats();
    assertThat(stats.missCount()).isEqualTo(0);
    assertThat(stats.loadSuccessCount()).isEqualTo(0);
    assertThat(stats.loadExceptionCount()).isEqualTo(0);

            @Override
            public void recordEviction() {}

            @Override
            public CacheStats snapshot() {
              return EMPTY_STATS;
            }
          });
  static final CacheStats EMPTY_STATS = new CacheStats(0, 0, 0, 0, 0, 0);

  /*
   * We avoid using a method reference or lambda here for now:
   *

      assertWithMessage("Invalid removal notification")
          .that(notification.getValue())
          .isEqualTo(notification.getKey());
    }

    CacheStats stats = cache.stats();
    assertThat(stats.evictionCount()).isEqualTo(removalListener.size());
    assertThat(stats.loadSuccessCount()).isEqualTo(computeCount.get());

    public long size() {
      return localCache.longSize();
    }

    @Override
    public ConcurrentMap<K, V> asMap() {
      return localCache;
    }

    @Override
    public CacheStats stats() {
      SimpleStatsCounter aggregator = new SimpleStatsCounter();
      aggregator.incrementBy(localCache.globalStatsCounter);
      for (Segment<K, V> segment : localCache.segments) {