public void test_statefulTransformer() {
        StatefulTransformer transformer = new StatefulTransformer("statefulTransformer");

        // Process multiple URLs
        String[] urls = { "http://example1.com", "http://example2.com", "http://example3.com" };

        for (String url : urls) {
            ResponseData responseData = new ResponseData();
            responseData.setUrl(url);

        rule.addCondition("url", "https?://.*\\.example\\.com/.*");

        ResponseData responseData1 = new ResponseData();
        responseData1.setUrl("http://www.example.com/page");
        assertTrue(rule.match(responseData1));

        ResponseData responseData2 = new ResponseData();
        responseData2.setUrl("https://api.example.com/v1/users");
        assertTrue(rule.match(responseData2));

        urlFilter.addInclude("https?://[^/]+\\.example\\.com/.*");

        assertTrue(urlFilter.match("http://www.example.com/"));
        assertTrue(urlFilter.match("https://api.example.com/v1/users"));
        assertTrue(urlFilter.match("http://subdomain.example.com/page"));
        assertFalse(urlFilter.match("https://example.org/"));
        assertFalse(urlFilter.match("ftp://files.example.com/"));
    }

    /**

        // Set patterns
        conditionalRule.setUrlPattern("https?://.*\\.example\\.com/.*");
        conditionalRule.setMimeTypePattern("text/.*");

        // Test matching
        ResponseData responseData1 = new ResponseData();
        responseData1.setUrl("http://www.example.com/page");
        responseData1.setMimeType("text/html");
        assertTrue(conditionalRule.match(responseData1));

        assertEquals("http://example.com:8080/path/file", HcHttpClient.constructRedirectLocation("http://example.com:8080/path/", "file"));
        assertEquals("http://example.com/%E3%83%86%E3%82%B9%E3%83%88",
                HcHttpClient.constructRedirectLocation("http://example.com/", "テスト"));
        assertEquals("http://example.com/hello%20world", HcHttpClient.constructRedirectLocation("http://example.com/", "hello world"));

        Crawler crawler = container.getComponent("crawler");
        
        // Configure crawling parameters
        crawler.addUrl("https://example.com");
        crawler.crawlerContext.setMaxAccessCount(100);
        crawler.crawlerContext.setNumOfThread(5);
        crawler.urlFilter.addInclude("https://example.com/.*");
        
        // Execute crawling
        String sessionId = crawler.execute();

 * </p>
 *
 * <p>
 * Example usage:
 * </p>
 *
 * <pre>
 * XpathTransformer transformer = new XpathTransformer();
 * transformer.addFieldRule("title", "//title/text()");
 * transformer.addFieldRule("body", "//body/p/text()");
 *
 * ResponseData responseData = new ResponseData();

        String[] sitemaps = new String[] { "http://example.com/sitemap.xml", "http://test.com/sitemap.xml" };
        crawlerContext.addSitemaps(sitemaps);

        // Remove and verify
        String[] removedSitemaps = crawlerContext.removeSitemaps();
        assertNotNull(removedSitemaps);
        assertEquals(2, removedSitemaps.length);
        assertEquals("http://example.com/sitemap.xml", removedSitemaps[0]);

     * and file name. It also provides methods to construct URLs for child paths.
     *
     * <p>
     * Usage example:
     * </p>
     *
     * <pre>
     * {@code
     * FtpInfo ftpInfo = new FtpInfo("ftp://example.com/path/to/file.txt");
     * String host = ftpInfo.getHost(); // example.com
     * int port = ftpInfo.getPort(); // 21
     * String parent = ftpInfo.getParent(); // /path/to

        responseData.setUrl("http://example.com/test");

        ResultData result = transformer.transform(responseData);

        // Verify
        assertNotNull(result);
        assertEquals("customName", result.getTransformerName());
        assertEquals(1, transformer.getTransformCallCount());
        assertEquals("http://example.com/test", transformer.getLastResponseData().getUrl());