dispatcher = Dispatcher.legacyAsync();

    CyclicBarrier barrier = new CyclicBarrier(2);
    CountDownLatch latch = new CountDownLatch(2);

    new Thread(
            new Runnable() {
              @Override
              public void run() {
                try {
                  barrier.await();
                } catch (Exception e) {
                  throw new AssertionError(e);
                }

      new ListenerCallQueue.Event<Object>() {
        @Override
        public void call(Object object) {
          throw new RuntimeException();
        }

        @Override
        public String toString() {
          return "throwing()";
        }
      };

  public void testEnqueueAndDispatch() {
    Object listener = new Object();

      new ListenerCallQueue.Event<Object>() {
        @Override
        public void call(Object object) {
          throw new RuntimeException();
        }

        @Override
        public String toString() {
          return "throwing()";
        }
      };

  public void testEnqueueAndDispatch() {
    Object listener = new Object();

        if (queueSize < 1 || batchMaxSize < 1) {
            throw new IllegalArgumentException("Queue and batch sizes must be greater than 1");
        }
        this.batchMaxSize = batchMaxSize;
        this.blockOnLastEvent = blockOnLastEvent;

        this.eventQueue = new ArrayBlockingQueue<>(queueSize);
        this.closed = new AtomicBoolean(false);
        this.updater = new Thread(this::feedConsumer, "simplex-transfer-listener");

        }

        final String[] hosts = split(ResourceUtil.getFesenHttpUrl(), ",")
                .get(stream -> stream.map(String::trim).filter(StringUtil::isNotEmpty).toArray(n -> new String[n]));
        nodeManager = new NodeManager(hosts, node -> request(new CurlRequest(Method.GET, node.getUrl("/"))));
        nodeManager.setHeartbeatInterval(fessConfig.getFesenHeartbeatInterval());
    }

    /**

            case 'c':
            case 'd':
            case 'e':
            case 'f':
                value += 10 + arr[ai] - 'a';
                break;
            default:
                throw new IllegalArgumentException(new String(arr, offset, length));
            }
            count++;
        }

        return value;
    }

    NavigableSetTestSuiteBuilder<E> builder = new NavigableSetTestSuiteBuilder<>();
    builder.usingGenerator(generator);
    return builder;
  }

  @Override
  protected List<TestSuite> createDerivedSuites(
      FeatureSpecificTestSuiteBuilder<?, ? extends OneSizeTestContainerGenerator<Collection<E>, E>>
          parentBuilder) {
    List<TestSuite> derivedSuites = new ArrayList<>(super.createDerivedSuites(parentBuilder));

    checkNotNull(file);
    checkNotNull(charset);
    return new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file), charset));
  }

  /**
   * Returns a new {@link ByteSource} for reading bytes from the given file.
   *
   * @since 14.0
   */
  public static ByteSource asByteSource(File file) {
    return new FileByteSource(file);
  }

  private static final class FileByteSource extends

            if (shouldThrowException) {
                throw new RuntimeException("Test exception in delayBeforeProcessing");
            }
        }

        @Override
        protected void delayAfterProcessing() {
            afterProcessingCount++;
            if (shouldThrowException) {
                throw new RuntimeException("Test exception in delayAfterProcessing");
            }
        }

  }

  public SafeTreeSet(Comparator<? super E> comparator) {
    this(new TreeSet<E>(comparator));
  }

  public SafeTreeSet(SortedSet<E> set) {
    this(new TreeSet<E>(set));
  }

  private SafeTreeSet(NavigableSet<E> delegate) {
    this.delegate = delegate;
    for (E e : this) {
      checkValid(e);
    }
  }

  @Override
  public boolean add(E element) {