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

    // Test addFinishedSessionId
    @Test
    public void test_addFinishedSessionId() {
        final String sessionId = "session123";
        indexUpdater.addFinishedSessionId(sessionId);
        assertTrue(indexUpdater.finishedSessionIdList.contains(sessionId));
    }