// Test sessionIdList
        final List<String> sessionIdList = Arrays.asList("session1", "session2");
        indexUpdater.setSessionIdList(sessionIdList);
        assertEquals(sessionIdList, indexUpdater.getSessionIdList());

        // Test finishCrawling
        indexUpdater.setFinishCrawling(true);
        // finishCrawling should be set when max empty list count is exceeded