* Test activeThreadCountLock getter
     */
    public void test_activeThreadCountLock() {
        Object lock = crawlerContext.getActiveThreadCountLock();
        assertNotNull(lock);

        // Should return same instance
        Object sameLock = crawlerContext.getActiveThreadCountLock();
        assertSame(lock, sameLock);
    }

    /**
     * Test numOfThread getter and setter
     */