assertThrows(IllegalStateException.class, () -> builder.build(identityLoader()));
  }

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

  @GwtIncompatible // weigher

      public V load(K key) throws Exception {
        throw e;
      }
    };
  }

  /** Returns a {@link CacheLoader} that returns the key for every request. */
  static <T> IdentityLoader<T> identityLoader() {
    return new IdentityLoader<T>();
  }

  /**
   * Returns a {@code new Object()} for every request, and increments a counter for every request.
   * The count is accessible via {@link #getCount}.
   */

    IdentityLoader<Object> loader = identityLoader();
    for (int i = 1; i < 1000; i++) {
      LoadingCache<Object, Object> cache = CacheBuilder.newBuilder().maximumSize(i).build(loader);
      assertEquals(i, CacheTesting.getTotalSegmentSize(cache));
    }
  }

  public void testEviction_setMaxSegmentWeight() {
    IdentityLoader<Object> loader = identityLoader();
    for (int i = 1; i < 1000; i++) {

    IdentityLoader<Object> loader = identityLoader();
    for (int i = 1; i < 1000; i++) {
      LoadingCache<Object, Object> cache = CacheBuilder.newBuilder().maximumSize(i).build(loader);
      assertEquals(i, CacheTesting.getTotalSegmentSize(cache));
    }
  }

  public void testEviction_setMaxSegmentWeight() {
    IdentityLoader<Object> loader = identityLoader();
    for (int i = 1; i < 1000; i++) {

    CacheLoader<Object, Object> loader = identityLoader();
    tester.testAllPublicInstanceMethods(makeCache(createCacheBuilder(), loader));
  }

  // stats tests

  public void testStats() {
    CacheBuilder<Object, Object> builder = createCacheBuilder().concurrencyLevel(1).maximumSize(2);
    LocalLoadingCache<Object, Object> cache = makeCache(builder, identityLoader());
    assertEquals(EMPTY_STATS, cache.stats());

    assertThrows(IllegalStateException.class, () -> builder.build(identityLoader()));
  }

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

  @GwtIncompatible // weigher

    CacheLoader<Object, Object> loader = identityLoader();
    tester.testAllPublicInstanceMethods(makeCache(createCacheBuilder(), loader));
  }

  // stats tests

  public void testStats() {
    CacheBuilder<Object, Object> builder = createCacheBuilder().concurrencyLevel(1).maximumSize(2);
    LocalLoadingCache<Object, Object> cache = makeCache(builder, identityLoader());
    assertEquals(EMPTY_STATS, cache.stats());

      public V load(K key) throws Exception {
        throw e;
      }
    };
  }

  /** Returns a {@link CacheLoader} that returns the key for every request. */
  static <T> IdentityLoader<T> identityLoader() {
    return new IdentityLoader<T>();
  }

  /**
   * Returns a {@code new Object()} for every request, and increments a counter for every request.
   * The count is accessible via {@link #getCount}.
   */

import static com.google.common.cache.TestingCacheLoaders.identityLoader;
import static com.google.common.cache.TestingRemovalListeners.countingRemovalListener;
import static com.google.common.truth.Truth.assertThat;
import static java.util.Arrays.asList;
import static java.util.concurrent.TimeUnit.MILLISECONDS;

import com.google.common.cache.TestingCacheLoaders.IdentityLoader;

      // all caches should be different: instance equality
      new EqualsTester()
          .addEqualityGroup(builder.build(identityLoader()))
          .addEqualityGroup(builder.build(identityLoader()))
          .addEqualityGroup(builder.build(identityLoader()))
          .testEquals();
    }
  }

  public void testGet_null() throws ExecutionException {