}
            };
            ComponentUtil.register(mockProperties, "systemProperties");

            // Register mock system helper
            SystemHelper mockSystemHelper = new SystemHelper() {
                @Override
                public File createTempFile(String prefix, String suffix) {
                    try {
                        return File.createTempFile(prefix, suffix);

        // Create a temporary project.properties file for SystemHelper
        File propFile = File.createTempFile("project", ".properties");
        propFile.deleteOnExit();
        try (FileOutputStream fos = new FileOutputStream(propFile)) {
            fos.write("fess.version=1.0.0".getBytes());
        }

        // Initialize SystemHelper
        SystemHelper systemHelper = new SystemHelper() {
            @Override

     * @return the updated buffer
     */
    protected StringBuilder appendTimestamp(final StringBuilder buf) {
        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
        append(buf, "timestamp", () -> FessFunctions.formatDate(systemHelper.getCurrentTime()));
        return buf;
    }

    /**
     * Appends exception information to the buffer.
     *

        monitorTarget = new TestMonitorTarget();

        // Setup SystemHelper with a fixed timestamp for testing
        systemHelper = new SystemHelper() {
            @Override
            public Date getCurrentTime() {
                return new Date(1609459200000L); // 2021-01-01 00:00:00 UTC
            }
        };
        ComponentUtil.register(systemHelper, "systemHelper");
    }

    @Override

    private DataIndexHelper dataIndexHelper;
    private PathMappingService pathMappingService;
    private CrawlingInfoService crawlingInfoService;
    private CrawlingInfoHelper crawlingInfoHelper;
    private SystemHelper systemHelper;
    private FessConfig fessConfig;
    private DynamicProperties systemProperties;
    private PathMappingHelper pathMappingHelper;
    private DuplicateHostHelper duplicateHostHelper;

            // Register mock system helper
            SystemHelper mockSystemHelper = new SystemHelper() {
                @Override
                public void updateSystemProperties() {
                    // Mock implementation
                }
            };
            ComponentUtil.register(mockSystemHelper, "systemHelper");

            // Register mock FessConfig

        final long currentTime = 1704067200000L; // 2024-01-01 00:00:00 UTC
        ComponentUtil.register(new SystemHelper() {
            @Override
            public long getCurrentTimeAsLong() {
                return currentTime;
            }
        }, "systemHelper");

        ComponentUtil.register(new CrawlingInfoService() {
            @Override

                return Constants.FALSE;
            }
        }

        return Constants.TRUE;

    }

    protected synchronized void initDocPathPattern() {
        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();

        if (includedDocPathPatterns == null) {
            if (StringUtil.isNotBlank(getIncludedDocPaths())) {
                final List<Pattern> pathPatterList = new ArrayList<>();

     */
    private String getStackTrace(final Throwable t) {
        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
        try (final StringWriter sw = new StringWriter(); final PrintWriter pw = new PrintWriter(sw)) {
            t.printStackTrace(pw);
            pw.flush();
            return systemHelper.abbreviateLongText(sw.toString());
        } catch (final IOException e) {

        originalProcessHelper = ComponentUtil.hasComponent("processHelper") ? ComponentUtil.getProcessHelper() : null;
        originalJobHelper = ComponentUtil.hasComponent("jobHelper") ? ComponentUtil.getJobHelper() : null;

        // Register mock helpers
        ComponentUtil.register(new SystemHelper() {
            @Override