final CrawlerThread crawlerThread = crawlerContainer.getComponent("crawlerThread");
            crawlerThread.setCrawlerContext(crawlerContext);
            crawlerThread.setClientFactory(clientFactory);
            threads[i] =
                    new Thread(crawlerThreadGroup, crawlerThread, "Crawler-" + crawlerContext.sessionId + "-" + Integer.toString(i + 1));
            threads[i].setDaemon(daemon);

        crawlerThread.dataService = dataService;
        crawlerThread.crawlerContainer = crawlerContainer;
        crawlerThread.logHelper = logHelper;
        crawlerThread.setClientFactory(clientFactory);
        crawlerThread.setCrawlerContext(crawlerContext);

        when(crawlerContainer.available()).thenReturn(true);
    }

    /**
     * Test isValid method with a valid URL queue.
     */