*/
  @GuardedBy("lock")
  private int runningTasks = 0;

  @GuardedBy("lock")
  private boolean shutdown = false;

  @Override
  public void execute(Runnable command) {
    startTask();
    try {
      command.run();
    } finally {
      endTask();
    }
  }

  @Override
  public boolean isShutdown() {
    synchronized (lock) {
      return shutdown;
    }
  }

        }
      };

  private static final Supplier<Lock> LOCK_SUPPLER =
      new Supplier<Lock>() {
        @Override
        public Lock get() {
          return new ReentrantLock();
        }
      };

  private static final Supplier<Lock> FAIR_LOCK_SUPPLER =
      new Supplier<Lock>() {
        @Override
        public Lock get() {
          return new ReentrantLock(true);
        }
      };

        }
      };

  private static final Supplier<Lock> LOCK_SUPPLER =
      new Supplier<Lock>() {
        @Override
        public Lock get() {
          return new ReentrantLock();
        }
      };

  private static final Supplier<Lock> FAIR_LOCK_SUPPLER =
      new Supplier<Lock>() {
        @Override
        public Lock get() {
          return new ReentrantLock(true);
        }
      };

  }

  @AndroidIncompatible // Mocking ExecutorService is forbidden there. TODO(b/218700094): Don't mock.
  public void testGetExitingExecutorService_executorDelegatesToOriginal() {
    TestApplication application = new TestApplication();
    ThreadPoolExecutor executor = mock(ThreadPoolExecutor.class);
    ThreadFactory threadFactory = mock(ThreadFactory.class);
    when(executor.getThreadFactory()).thenReturn(threadFactory);

 * test with reference to the same "lock-like object", and then their interactions with that object
 * are choreographed via the various methods on this class.
 *
 * <p>A "lock-like object" is really any object that may be used for concurrency control. If the
 * {@link #callAndAssertBlocks} method is ever called in a test, the lock-like object must have a

        crawlerContext.maxAccessCount = 0;

        urlQueueService = mock(UrlQueueService.class);
        dataService = mock(DataService.class);
        crawlerContainer = mock(CrawlerContainer.class);
        logHelper = mock(LogHelper.class);
        clientFactory = mock(CrawlerClientFactory.class);
        urlFilter = mock(UrlFilter.class);
        ruleManager = mock(RuleManager.class);

        crawlerContext.urlFilter = urlFilter;

 * test with reference to the same "lock-like object", and then their interactions with that object
 * are choreographed via the various methods on this class.
 *
 * <p>A "lock-like object" is really any object that may be used for concurrency control. If the
 * {@link #callAndAssertBlocks} method is ever called in a test, the lock-like object must have a

  }

  @AndroidIncompatible // Mocking ExecutorService is forbidden there. TODO(b/218700094): Don't mock.
  public void testGetExitingExecutorService_executorDelegatesToOriginal() {
    TestApplication application = new TestApplication();
    ThreadPoolExecutor executor = mock(ThreadPoolExecutor.class);
    ThreadFactory threadFactory = mock(ThreadFactory.class);
    when(executor.getThreadFactory()).thenReturn(threadFactory);

    /**
     * Get the value for the key 'mail.send.mock'. <br>
     * The value is, e.g. true <br>
     * comment: Does it send mock mail? (true: no send actually, logging only)
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getMailSendMock();

    /**
     * Is the property for the key 'mail.send.mock' true? <br>
     * The value is, e.g. true <br>

        final SearchResponse mockScrollResponse = mock(SearchResponse.class);
        final SearchHits mockScrollHits = mock(SearchHits.class);
        final ActionFuture<SearchResponse> mockScrollFuture = mock(ActionFuture.class);

        final BulkRequestBuilder mockBulkBuilder = mock(BulkRequestBuilder.class);
        final BulkResponse mockBulkResponse = mock(BulkResponse.class);