assertTrue(result.contains("data4"));
    }

    public void test_Options_toString() {
        Crawler.Options options = new Crawler.Options();
        options.sessionId = "session123";
        options.name = "testCrawl";
        options.webConfigIds = "web1,web2";
        options.fileConfigIds = "file1";
        options.dataConfigIds = "data1";
        options.propertiesPath = "/path/to/props";

        assertEquals(3, indexUpdater.finishedSessionIdList.size());
        assertTrue(indexUpdater.finishedSessionIdList.contains("session1"));
        assertTrue(indexUpdater.finishedSessionIdList.contains("session2"));
        assertTrue(indexUpdater.finishedSessionIdList.contains("session3"));
    }

    // Test run method with null DataService
    public void test_run_nullDataService() {