// In test environment this may not work as expected
        // assertTrue(indexUpdater.finishCrawling);

        // Test maxIndexerErrorCount
        indexUpdater.setMaxIndexerErrorCount(5);
        assertEquals(5, indexUpdater.maxIndexerErrorCount);

        // Test crawlerList
        final List<Crawler> crawlerList = new ArrayList<>();
        indexUpdater.setCrawlerList(crawlerList);