can't get promise result from angular service - angularjs

Question

I'm trying to mock a service I'm using and should return a promise, the mock service is being called but I can't get the result to my test.
service function to be tested:
function getDevices() {
console.log('getDevices');
return servicesUtils.doGetByDefaultTimeInterval('devices')
.then(getDevicesComplete);
function getDevicesComplete(data) {
console.log('getDevicesComplete');
var devices = data.data.result;
return devices;
}
}
My test is:
describe('devicesService tests', function () {
var devicesService;
var servicesUtils, $q, $rootScope;
beforeEach(function () {
servicesUtils = {};
module('app.core', function ($provide) {
servicesUtils = specHelper.mockServiceUtils($provide, $q, $rootScope);
});
inject(function (_devicesService_, _$q_, _$rootScope_) {
devicesService = _devicesService_;
$q = _$q_;
$rootScope = _$rootScope_.$new();
});
});
it('getting device list', function () {
console.log('getting device list');
devicesService.getDevices().then(function (result) {
console.log(result);
expect(result).toBeDefined();
});
});
});
Mock file:
function mockServiceUtils($provide, $q) {
var servicesUtils = {};
servicesUtils.doGetByDefaultTimeInterval = jasmine.createSpy().and.callFake(function() {
var deferred = $q.defer();
deferred.resolve('Remote call result');
$rootScope.$digest();
return deferred.promise;
});
$provide.value('servicesUtils', servicesUtils);
return servicesUtils;
}

Answer 1

Your code is way too complex.
Let's assume that you want to test a service devicesService that uses another service servicesUtils, having a method that returns a promise.
Let's assume devicesService's responsibility is to call servicesUtils and transform its result.
Here's how I would do it:
describe('devicesService', function() {
var devicesService, servicesUtils;
beforeEach(module('app.core'));
beforeEach(inject(function(_devicesService_, _servicesUtils_) {
devicesService = _devicesService_;
servicesUtils = _servicesUtils_;
}));
it('should get devices', inject(function($q, $rootScope) {
spyOn(servicesUtils, 'doGetByDefaultTimeInterval').and.returnValue($q.when('Remote call result'));
var actualResult;
devicesService.getDevices().then(function(result) {
actualResult = result;
});
$rootScope.$apply();
expect(actualResult).toEqual('The transformed Remote call result');
}));
});