public async void AddNotification_Success()
        {
            CityRepository repository = new CityRepository();

            City city = new City();
            //{
            //    NOTIFICATION_TEXT = "Unit Test notification",
            //    CREATED_DATE = DateTime.Now,
            //    ID_DEPENDENCY = "iIAW2gamws"
            //};

            RepositoryResponse<City> expected = new RepositoryResponse<City>
            {
                Success = true,
                Data = city
            };

            var cities = new List<City> { new City { ID = "GUf2kxo3Yl" } };

            RepositoryResponse<List<City>> result = await repository.GetCities();

            Assert.IsTrue(result.Success, "Notifications not created");
            Assert.IsNotNull(result.Data.Count > 0);
            Assert.IsNull(result.Error, "Some error ocurred");
        }
        public async Task<RepositoryResponse<Notification>> AddNotification(Notification notification)
        {

            var response = new RepositoryResponse<Notification> { };
            try
            {
                var Noti = Parse.ParseObject.Create("Notification");

                

                #region Add Dependency Relationship

                DependencyRepository DependencyContext = new DependencyRepository();

                RepositoryResponse<ParseObject> Dependency = await DependencyContext.GetDependencyById(notification.ID_DEPENDENCY);

                ParseQuery<ParseObject> query = new ParseQuery<ParseObject>("Dependency");
                IEnumerable<ParseObject> result = await query.FindAsync();

                #endregion

                #region Add City Relationship

                CityRepository CityContext = new CityRepository();

                RepositoryResponse<ParseObject> City = await CityContext.GetCityById(notification.ID_CITY);

                query = new ParseQuery<ParseObject>("City");
                result = await query.FindAsync();

                #endregion

                var relation = Noti.GetRelation<ParseObject>("ID_Dependency");
                relation.Add(Dependency.Data);

                relation = Noti.GetRelation<ParseObject>("ID_City");
                relation.Add(City.Data);

                var message = string.Format("{0} > {1}: {2}", Dependency.Data["Name"].ToString(), City.Data["Name"].ToString(), notification.NOTIFICATION_TEXT);

                Noti.Add("NotificationText", message);
                await Noti.SaveAsync();

                await Noti.SaveAsync();

                var push = new ParsePush();
                push.Query = from installation in ParseInstallation.Query
                             where installation.Get<string>("City").Contains(notification.ID_CITY)
                             select installation;
                push.Alert = message;
                await push.SendAsync();

                notification.ID = Noti.ObjectId;
                response.Data = notification;

                response.Success = true;
            }
            catch (Exception ex)
            {
                response.Success = false;
                response.Error = ex;
            }

            return response;
        }