public String getHostname() {
                return "test-hostname";
            }
        };

        FessConfig fessConfig = createTestFessConfig();

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

        notificationHelper = new NotificationHelper() {
            @Override
            public void send(CardView cardView, SMailPostingDiscloser discloser) {
                // Mock implementation
            }
        };
        ComponentUtil.register(notificationHelper, "notificationHelper");

        postbox = new Postbox() {
            // Mock implementation