assertEquals(firstResult, secondResult);
        assertEquals(secondResult, thirdResult);

        // Rule ID should remain constant
        String id1 = rule.getRuleId();
        String id2 = rule.getRuleId();
        String id3 = rule.getRuleId();

        assertEquals(id1, id2);
        assertEquals(id2, id3);

        // Processor should remain the same instance
        ResponseProcessor proc1 = rule.getResponseProcessor();

        builder.setSettingsIndexName("MULTI_INDEX").addInitialSettings("multi.key", "multiValue").scrollTimeout("25s");

        SuggestSettings settings1 = builder.build(client, "id1");
        SuggestSettings settings2 = builder.build(client, "id2");

        assertNotNull(settings1);
        assertNotNull(settings2);
        // Both should be created with the same configuration

        server.start();

        final String url = "http://localhost:7070/hoge.html";
        try {
            final CrawlerContext crawlerContext = new CrawlerContext();
            final String sessionId = "id1";
            urlFilter.init(sessionId);
            crawlerContext.setUrlFilter(urlFilter);
            CrawlingParameterUtil.setCrawlerContext(crawlerContext);
            httpClient.init();

            assertTrue("Exception handling should be fast", true);
        }
    }

    public void test_crawl_withConfigIdList_emptyList() {
        try {
            List<String> configIds = Arrays.asList("id1", "id2");
            dataIndexHelper.crawl("test-session", configIds);
            assertTrue("Should complete quickly with empty results", true);
        } catch (Exception e) {