}

    boolean hasNext() {
      return !tasks.isEmpty();
    }

    void runNext() {
      assertTrue("expected at least one task to run", hasNext());
      tasks.remove().run();
    }

    void runAll() {
      while (hasNext()) {
        runNext();
      }
    }
  }

  private FakeExecutor fakePool;
  private SequentialExecutor e;

  @Override
  public void setUp() {

    }

    boolean hasNext() {
      return !tasks.isEmpty();
    }

    void runNext() {
      assertTrue("expected at least one task to run", hasNext());
      tasks.remove().run();
    }

    void runAll() {
      while (hasNext()) {
        runNext();
      }
    }
  }

  private FakeExecutor fakePool;
  private SequentialExecutor e;

  @Override
  public void setUp() {

    // Test getExecuteType method
    @Test
    public void test_getExecuteType() {
        assertEquals(Constants.EXECUTE_TYPE_CRAWLER, crawlJob.getExecuteType());
    }

    // Test execute method with runAll scenario
    @Test
    public void test_execute_runAll() {
        // Setup test
        crawlJob = new CrawlJob() {
            @Override
            protected int getRunningJobCount() {

            final List<String> dataConfigIdList = options.getDataConfigIdList();
            final boolean runAll = webConfigIdList == null && fileConfigIdList == null && dataConfigIdList == null;

            Thread webFsCrawlerThread = null;
            Thread dataCrawlerThread = null;

            if (runAll || webConfigIdList != null || fileConfigIdList != null) {
                webFsCrawlerThread = new Thread((Runnable) () -> {