LogNotificationHelper helper = new LogNotificationHelper();
        // destroy() without init() should not throw NPE because of null checks
        helper.destroy();
    }

    @Test
    public void test_init_destroy_multipleRounds() {
        LogNotificationHelper helper = new LogNotificationHelper();
        helper.init();
        helper.destroy();
        // Second round
        helper.init();
        helper.destroy();
    }