public void test_execute_concurrentCalls() {
        // Setup mock SearchLogHelper for concurrent testing
        final Object lock = new Object();
        final int[] callCount = { 0 };

        SearchLogHelper mockSearchLogHelper = new SearchLogHelper() {
            @Override
            public void storeSearchLog() {
                synchronized (lock) {
                    callCount[0]++;

     * always under a lock.
     */
    private static final class SupplantableFuture implements Cancellable {
      private final ReentrantLock lock;

      @GuardedBy("lock")
      private Future<@Nullable Void> currentFuture;

      SupplantableFuture(ReentrantLock lock, Future<@Nullable Void> currentFuture) {
        this.lock = lock;
        this.currentFuture = currentFuture;
      }

            }
        };

        NotificationHelper notificationHelper = new NotificationHelper() {
            // Mock send method
            public void send(final Object postcard) {
                // Mock implementation
            }
        };

        // Mock Postbox - no need to mock, the framework will handle it

        // Register components

     * always under a lock.
     */
    private static final class SupplantableFuture implements Cancellable {
      private final ReentrantLock lock;

      @GuardedBy("lock")
      private Future<@Nullable Void> currentFuture;

      SupplantableFuture(ReentrantLock lock, Future<@Nullable Void> currentFuture) {
        this.lock = lock;
        this.currentFuture = currentFuture;
      }

            protected int getRunningJobCount() {
                return 0;
            }

            @Override
            protected void executeCrawler() {
                // Mock execution
            }
        };

        // Mock ComponentUtil
        ComponentUtil.setFessConfig(new TestFessConfig() {
            @Override
            public Integer getJobMaxCrawlerProcessesAsInteger() {
                return 5;

    @Override
    public void setUp() throws Exception {
        super.setUp();
        updateLabelJob = new UpdateLabelJob();

        // Setup mock components
        setupMockComponents();
    }

    private void setupMockComponents() {
        // Mock SearchEngineClient
        SearchEngineClient mockSearchEngineClient = new SearchEngineClient() {
            @Override
            public long updateByQuery(String index,

            // Mock implementation
        };
        generator.searchEngineClient = mockClient;
        assertEquals(mockClient, generator.searchEngineClient);
    }

    // Helper methods for setting up mock components
    private void setupMockComponents() {
        try {
            // Register mock system properties

                    // Mock implementation
                }
            };
            ComponentUtil.register(mockProperties, "systemProperties");

            // Register mock system helper
            SystemHelper mockSystemHelper = new SystemHelper() {
                @Override
                public void updateSystemProperties() {
                    // Mock implementation
                }

    private Postbox postbox;

    @Override
    public void setUp() throws Exception {
        super.setUp();
        crawler = new Crawler();

        // Initialize mock components
        searchEngineClient = new SearchEngineClient() {
            // Mock implementation
        };
        crawler.searchEngineClient = searchEngineClient;

        webFsIndexHelper = new WebFsIndexHelper() {
            @Override

        deleteByQueryCalled = false;
        deleteIndex = null;
        deleteQuery = null;
        expiresFieldName = "expires";
        documentUpdateIndex = "fess.update";

        // Create mock SearchEngineClient
        searchEngineClient = new SearchEngineClient() {
            @Override
            public long deleteByQuery(String index, QueryBuilder query) {
                deleteByQueryCalled = true;