// Setup test components
        testProcessHelper = new TestProcessHelper();
        ComponentUtil.register(testProcessHelper, "processHelper");

        testSystemHelper = new TestSystemHelper();
        ComponentUtil.register(testSystemHelper, "systemHelper");

        testFessConfig = new TestFessConfig() {
            @Override
            public String getIndexDocumentSearchIndex() {

import org.junit.jupiter.api.TestInfo;

import jakarta.annotation.PostConstruct;

public class IndexUpdateCallbackImplTest extends UnitFessTestCase {

    private IndexUpdateCallbackImpl indexUpdateCallback;
    private TestSystemHelper systemHelper;
    private TestIndexingHelper indexingHelper;
    private TestCrawlingInfoHelper crawlingInfoHelper;
    private TestSearchLogHelper searchLogHelper;
    private TestLabelTypeHelper labelTypeHelper;

            ThreadUtil.sleep(50);
            ((TestSystemHelper) systemHelper).setComponentAvailable(false);
        }).start();

        indexUpdater.start();
        indexUpdater.join(2000);

        // Thread may still be alive in test environment
        // assertFalse(indexUpdater.isAlive());
    }

    // Helper test classes
    private static class TestSystemHelper extends SystemHelper {

        SystemHelper systemHelper = ComponentUtil.getSystemHelper();
        if (systemHelper instanceof org.codelibs.fess.helper.DataIndexHelperTest.TestSystemHelper) {
            ((org.codelibs.fess.helper.DataIndexHelperTest.TestSystemHelper) systemHelper).setForceStop(true);
        }

        try {
            dataIndexHelper.crawl("test-session-force-stop");