assertTrue(causeStackTrace.length > 0);

        // Stack traces should be different
        assertNotSame(mainStackTrace, causeStackTrace);
    }

    /**
     * Test printStackTrace functionality
     */
    public void test_printStackTrace() {
        CrawlerSystemException exception = new CrawlerSystemException("Print stack trace test");

        StringWriter stringWriter = new StringWriter();

        NameTrackingTransformer tracker = new NameTrackingTransformer();
        ResponseData responseData = new ResponseData();

        // Transform with different names
        tracker.setName("name1");
        tracker.transform(responseData);

        tracker.setName("name2");
        tracker.transform(responseData);

        tracker.setName("name3");
        tracker.transform(responseData);

                        final String msg = buf.toString(Constants.UTF_8);
                        if (StringUtil.isNotBlank(msg)) {
                            if (logger.isTraceEnabled()) {
                                logger.trace(msg);
                            } else if (logger.isDebugEnabled()) {
                                logger.debug(msg);
                            } else if (logger.isWarnEnabled()) {

    /**
     * Test rule processor chain behavior
     */
    public void test_ruleProcessorChain() {
        final List<String> executionOrder = new ArrayList<>();

        // Create custom processor that tracks execution
        ResponseProcessor processor = new ResponseProcessor() {
            @Override
            public void process(ResponseData responseData) {
                executionOrder.add("processor_executed");