assertThat(cache.getUnchecked(key)).isSameInstanceAs(value);
    assertThat(cache.size()).isEqualTo(0);
    assertThat(cache.asMap().containsKey(key)).isFalse();
  }

  public void testCacheBuilderFrom_string() {
    CacheBuilder<?, ?> fromString =
        CacheBuilder.from(
            "initialCapacity=10,maximumSize=20,concurrencyLevel=30,"
                + "weakKeys,weakValues,expireAfterAccess=10m");