where:
        numThreads << [1, 4]
    }

    def "generates report with aggregated index page for failing build - #numThreads parallel thread(s)"() {
        given:
        report = reportWithMaxThreads(numThreads)
        def testTestResults = failingBuildResults()

        when:

    def "invoking DefaultSerializerRegistry from multiple threads"() {
        given:
        def conditions = new AsyncConditions(numThreads)
        def serializer = Stub(Serializer)
        numThreads.times { threadId ->
            Thread.startDaemon("DefaultSerializerRegistry Test #$threadId") {
                conditions.evaluate {

    List<Throwable> exceptions = runThreadsAndReturnExceptions(numThreads, task);

    assertThat(exceptions).isEmpty();
  }

  private static List<Throwable> runThreadsAndReturnExceptions(int numThreads, Runnable task) {
    List<Thread> threads = new ArrayList<>(numThreads);
    final List<Throwable> exceptions = new ArrayList<>(numThreads);
    for (int i = 0; i < numThreads; i++) {
      Thread thread = new Thread(task);

            if (executorService == null) {
                int numThreads = ComponentUtil.getFessConfig().getRankFusionThreadsAsInteger();
                if (numThreads <= 0) {
                    numThreads = (Runtime.getRuntime().availableProcessors() * 3) / 2 + 1;
                }
                executorService = Executors.newFixedThreadPool(numThreads);
            }
        }
    }