assertTrue(urls.contains("https://example.com/page2"));
            assertTrue(urls.contains("https://example.com/page3"));
        }
    }

    public void test_processEmptySitemapSet() {
        // Setup
        ResponseData responseData = new ResponseData();
        byte[] content = "<sitemapindex></sitemapindex>".getBytes();
        responseData.setResponseBody(content);