@Test
    public void test_init() {
        indexUpdater.init();
        assertNotNull(indexUpdater);
    }

    // Test initialization with IngestFactory
    @Test
    public void test_init_withIngestFactory() {
        ComponentUtil.register(ingestFactory, "ingestFactory");
        indexUpdater.init();
        assertNotNull(indexUpdater);
    }

    // Test destroy when crawling is not finished
    @Test