() -> CacheBuilder.newBuilder().weigher(constantWeigher(42)).maximumSize(1));
    assertThrows(
        IllegalStateException.class,
        () -> CacheBuilder.newBuilder().maximumSize(1).weigher(constantWeigher(42)));
  }

  @GwtIncompatible // weakKeys
  public void testKeyStrengthSetTwice() {
    CacheBuilder<Object, Object> builder1 = CacheBuilder.newBuilder().weakKeys();

        CacheBuilder.newBuilder().expireAfterWrite(10L, TimeUnit.MINUTES), CacheBuilder.from(spec));
  }

  public void testParse_writeExpirationSeconds() {
    CacheBuilderSpec spec = parse("expireAfterWrite=10s");
    assertEquals(TimeUnit.SECONDS, spec.writeExpirationTimeUnit);
    assertEquals(10L, spec.writeExpirationDuration);
    assertCacheBuilderEquivalence(

        CacheBuilder.newBuilder().expireAfterWrite(10L, TimeUnit.MINUTES), CacheBuilder.from(spec));
  }

  public void testParse_writeExpirationSeconds() {
    CacheBuilderSpec spec = parse("expireAfterWrite=10s");
    assertEquals(TimeUnit.SECONDS, spec.writeExpirationTimeUnit);
    assertEquals(10L, spec.writeExpirationDuration);
    assertCacheBuilderEquivalence(

        () -> CacheBuilder.newBuilder().weigher(constantWeigher(42)).maximumSize(1));
    assertThrows(
        IllegalStateException.class,
        () -> CacheBuilder.newBuilder().maximumSize(1).weigher(constantWeigher(42)));
  }

  @GwtIncompatible // weakKeys
  public void testKeyStrengthSetTwice() {
    CacheBuilder<Object, Object> builder1 = CacheBuilder.newBuilder().weakKeys();

                .getUserPrincipalLookupService()
                .lookupPrincipalByName(getUsername());
        ImmutableList<AclEntry> acl =
            ImmutableList.of(
                AclEntry.newBuilder()
                    .setType(ALLOW)
                    .setPrincipal(user)
                    .setPermissions(EnumSet.allOf(AclEntryPermission.class))
                    .setFlags(DIRECTORY_INHERIT, FILE_INHERIT)

 * cache instances created by {@code CacheBuilder} will not perform any type of eviction.
 *
 * <p>Usage example:
 *
 * <pre>{@code
 * LoadingCache<Key, Graph> graphs = CacheBuilder.newBuilder()
 *     .maximumSize(10000)
 *     .expireAfterWrite(10, TimeUnit.MINUTES)
 *     .removalListener(MY_LISTENER)
 *     .build(
 *         new CacheLoader<Key, Graph>() {