getUserTestQuestions = (testId): ng.IPromise<any> => {
    var self = this;
    var defer = this.$q.defer();
    this.$http({
        url: '/api/UserTestQuestion/GetAll/' + testId,
        method: "GET"
    })
        .success(function (data: IUserTestQuestion[]) {
            self.qs = data;;
            defer.resolve();
        })
        .error((data: any, status: number, headers: (headerName: string) => string, config: ng.IRequestConfig): void => {
            self.$ers.http(data, status, headers, config);
            defer.reject();
        })
    return defer.promise;
}

getUserTestQuestions = (testId): ng.IPromise<any> => {
    var self = this;
    var defer = this.$q.defer();
    if ( /// check here if questions are downloaded ) {
        defer.resolve();
    } else {
      this.$http({
          url: '/api/UserTestQuestion/GetAll/' + testId,
          method: "GET"
      })
        .success(function (data: IUserTestQuestion[]) {
            self.qs = data;;
            defer.resolve();
        })
        .error((data: any, status: number, headers: (headerName: string) => string, config: ng.IRequestConfig): void => {
            self.$ers.http(data, status, headers, config);
            defer.reject();
        })
    }
    return defer.promise;
}