@Override
    protected void setUp(TestInfo testInfo) throws Exception {
        super.setUp(testInfo);
        notificationHelper = new NotificationHelper();
    }

    @Test
    public void test_sendToSlack_withBlankWebhookUrls() {
        // Setup mock configuration with blank webhook URLs
        ComponentUtil.setFessConfig(new MockFessConfig() {
            @Override
            public String getSlackWebhookUrls() {