assertEquals("keyStrength", a.keyStrength, b.keyStrength);
    assertEquals("removalListener", a.removalListener, b.removalListener);
    assertEquals("weigher", a.weigher, b.weigher);
    assertEquals("valueEquivalence", a.valueEquivalence, b.valueEquivalence);
    assertEquals("valueStrength", a.valueStrength, b.valueStrength);

  }

  public void testEviction_weightedLru() {
    // test weighted lru within a single segment
    IdentityLoader<Integer> loader = identityLoader();
    LoadingCache<Integer, Integer> cache =
        CacheBuilder.newBuilder()
            .concurrencyLevel(1)
            .maximumWeight(45)
            .weigher(intKeyWeigher())
            .build(loader);
    CacheTesting.warmUp(cache, 0, 10);

    assertEquals("keyStrength", a.keyStrength, b.keyStrength);
    assertEquals("removalListener", a.removalListener, b.removalListener);
    assertEquals("weigher", a.weigher, b.weigher);
    assertEquals("valueEquivalence", a.valueEquivalence, b.valueEquivalence);
    assertEquals("valueStrength", a.valueStrength, b.valueStrength);

  }

  @GwtIncompatible // weigher
  public void testWeigher_withoutMaximumWeight() {
    CacheBuilder<Object, Object> builder = CacheBuilder.newBuilder().weigher(constantWeigher(42));
    assertThrows(IllegalStateException.class, () -> builder.build(identityLoader()));
  }

  @GwtIncompatible // weigher
  public void testWeigher_withMaximumSize() {
    assertThrows(

  }

  @GwtIncompatible // weigher
  public void testWeigher_withoutMaximumWeight() {
    CacheBuilder<Object, Object> builder = CacheBuilder.newBuilder().weigher(constantWeigher(42));
    assertThrows(IllegalStateException.class, () -> builder.build(identityLoader()));
  }

  @GwtIncompatible // weigher
  public void testWeigher_withMaximumSize() {
    assertThrows(

 * Double#POSITIVE_INFINITY POSITIVE_INFINITY} sort to the beginning and the end of the dataset, as
 * you would expect.
 *
 * <p>If required to do a weighted average between an infinity and a finite value, or between an
 * infinite value and itself, the infinite value is returned. If required to do a weighted average
 * between {@link Double#NEGATIVE_INFINITY NEGATIVE_INFINITY} and {@link Double#POSITIVE_INFINITY

        if (this.equivalence.equals(that.equivalence)) {
          /*
           * We'll accept that as sufficient "proof" that either equivalence should be able to
           * handle either reference, so it's safe to circumvent compile-time type checking.
           */
          @SuppressWarnings("unchecked")

   *     despite its deprecation. But if you can choose your hash function, avoid MD5, which is
   *     neither fast nor secure. As of January 2017, we suggest:
   *     <ul>
   *       <li>For security:
   *           {@link Hashing#sha256} or a higher-level API.
   *       <li>For speed: {@link Hashing#goodFastHash}, though see its docs for caveats.
   *     </ul>
   */
  @Deprecated

     * @param parentUrl the parent URL that referenced this child URL
     * @param weight the weight/priority of the child URL
     * @param depth the crawling depth of the child URL
     */
    @Override
    protected void storeChildUrl(final String childUrl, final String parentUrl, final float weight, final int depth) {
        if (StringUtil.isNotBlank(childUrl)) {

  }

  /**
   * Invoked prior to a proxy selection.
   *
   * This will be invoked for route selection regardless of whether the client
   * is configured with a single proxy, a proxy selector, or neither.
   *
   * @param url a URL with only the scheme, hostname, and port specified.
   */
  open fun proxySelectStart(
    call: Call,
    url: HttpUrl,
  ) {
  }

  /**
   * Invoked after proxy selection.