for (Thread thread : threads) {
            thread.join();
        }

        // Verify no exceptions
        assertTrue(exceptions.isEmpty());
    }

    /**
     * Test memory reference equality
     */
    public void test_memoryReferenceEquality() {
        // Enum instances are singletons
        CrawlerStatus status1 = CrawlerStatus.INITIALIZING;

     */
    protected boolean daemon = false;

    /**
     * Priority for crawler threads.
     */
    protected int threadPriority = Thread.NORM_PRIORITY;

    /**
     * Reference to the parent thread that started the crawler.
     */
    protected Thread parentThread;

    /**
     * The thread group for crawler threads.
     */
    protected ThreadGroup crawlerThreadGroup;

        TestResponseProcessor processor2 = new TestResponseProcessor();
        testRule.setRuleId("changedId");
        testRule.setResponseProcessor(processor2);

        // Verify changes are reflected (same object reference)
        assertEquals("changedId", registeredRule.getRuleId());
        assertSame(processor2, registeredRule.getResponseProcessor());
    }

    /**
     * Test inheritance behavior
     */

    /**
     * If true, the parser will convert CDATA nodes to Text nodes and append them to the adjacent Text node.
     */
    protected boolean coalescing;

    /**
     * If true, the parser will expand entity reference nodes.
     */
    protected boolean expandEntityRef = false;

    /**
     * If true, the parser will ignore comments.
     */
    protected boolean ignoringComments;

    /**