final List<String> sessionIdList = Arrays.asList("session1");
        indexUpdater.setSessionIdList(sessionIdList);

        // Set max empty list count to 1
        ((TestFessConfig) fessConfig).setMaxEmptyListCount(1);

        // Set up test data service to return empty results
        ((TestDataService) dataService).setAccessResultList(new TestOpenSearchResultList());

        indexUpdater.start();