Implementing Promises in angularJS - angularjs

Question

I'm attempting to implement some http.get() requests in an angular service, returning a promise.
Here is the excerpt from my initial service:
angular.module('dashboard').service('DashboardHTTP', ['$q', '$http', function ($q, $http) {
this.get_info = function () {
var deferred = $q.defer();
$http.get('/dashboard/4/api/info', { cache: true }).success(function (data) {
deferred.resolve(data);
}).error(function () {
deferred.reject('Could Not Complete Request');
});
return deferred.promise;
}
}]);
And here is an excerpt from the portion of my controller where I call the service:
DashboardHTTP.get_info().then(
function (response) {
var resp = response;
$rootScope.dash_info = resp;
},
function (response) {
return 'error';
},
function (response) {
return 'notify';
});
My questions:
I'm struggling with determining how much testing is needed for an interaction like this. I currently have the following test, which is testing at the service level, but I'm wondering if I need to test at the controller level and if so what sort of testing needs to occur?
beforeEach(inject(function (_$httpBackend_, $injector) {
service = $injector.get('DashboardHTTP');
$httpBackend = _$httpBackend_;
}));
afterEach(function () {
$httpBackend.verifyNoOutstandingExpectation();
$httpBackend.verifyNoOutstandingRequest();
});
describe('get_info', function () {
it(' should get info from the url /api/info', function () {
var returnData = { data: 'lots of data' };
$httpBackend.expectGET('/dashboard/4/api/info').respond(returnData);
var returnedPromise = service.get_info();
var result;
returnedPromise.then(function (response) {
result = response;
});
$httpBackend.flush();
expect(result).toEqual(returnData);
});
});
My goal is that I want to set $rootScope.dash_info to the response from the HTTP request made by Service.get_info(). Is my implementation in my controller appropriate? If so, how do I test that the correct data is being passed in at the controller level?

Answer 1

This is probably a partial answer, but here's my input:
Your call is asynchronous, therefore your test should be. Use done.
it(' should get info from the url /api/info', function (done) {
var returnData = { data: 'lots of data' };
$httpBackend.expectGET('/dashboard/4/api/info').respond(returnData);
var returnedPromise = service.get_info();
var result;
returnedPromise.then(function (response) {
result = response;
expect(result).toEqual(returnData);
done();
});
$httpBackend.flush();
});
Also, you do know that http.get returns a promise, right? It has also success and error functions, but it is still a promise.