public async Task TestForSendNotificationToUser()
        {
            var objectTobeSentinBusinessLayer = new Notification()
            {
                Message = "Himani posted on your wall"
            };
            var objectToBeSentinServiceLayer = new ServiceLayer.DataContract.Notification()
            {
                Message = "Himani posted on your wall"
            };
            Mock <INotificationManager> manager = new Mock <INotificationManager>();

            manager.Setup(mock => mock.PushNotificationsAsync(It.IsAny <Notification>())).Returns(Task.FromResult(objectTobeSentinBusinessLayer));
            NotificationServices services = new NotificationServices(manager.Object);
            var expectedOutput            = await services.PushNotificationsAsync(objectToBeSentinServiceLayer);

            Assert.AreEqual(expectedOutput.Id, objectToBeSentinServiceLayer.Id);
            Assert.AreEqual(expectedOutput.Message, objectToBeSentinServiceLayer.Message);
        }