public async Task TestForGetAllNotifications()
        {
            List <Notification>         listOfNotifications = new List <Notification>();
            Mock <INotificationManager> manager             = new Mock <INotificationManager>();

            manager.Setup(mock => mock.GetNotificationsAsync("hverma")).Returns(Task.FromResult(listOfNotifications));
            NotificationServices services = new NotificationServices(manager.Object);
            var expectedOutput            = await services.GetNotificationsAsync("hverma");

            CollectionAssert.AreEqual(listOfNotifications, expectedOutput);
        }