How to test Angular controller having a service - angularjs

Question

I am having a controller and service like below
(function () {
var mockController = function ($scope, MockService) {
$scope.message = "This is a text message";
$scope.getCities = function () {
$scope.places = [];
MockService.getCities().then(function (response) {
var places = response.data["weather-app:root"].city;
if (places) {
if (Array.isArray(places)) {
$scope.places = places;
} else {
$scope.places.push(places);
}
}
});
};
};
var mockService = function ($http) {
this.getCities = function () {
return $http.get("../rest/url", {
headers: {
'Accept': 'application/yang.data+json'
}
});
};
};
angular.module("MockApp", [])
.service("MockService", mockService)
.controller("MockController", mockController);
}())
I created a mock service like below for mocking the service for unit testing.
(function () {
angular.module('mock.service', [])
.service('MockService', function ($q) {
var mockService = {};
mockService.getCities = function () {
var mydata = {
"weather-app:root": {
"city": [
{
"city-name": "Chennai"
, "country-name": "India"
}
, {
"city-name": "Mangalore"
, "country-name": "India"
}
]
}
}
return $q.when(mydata);
};
return mockService;
});
}());
My test case is like
describe("MockController", function () {
var $scope;
beforeEach(function () {
module("MockApp");
beforeEach(module('mock.service'));
inject(function (_$controller_, _$rootScope_, _MockService_) {
$scope = _$rootScope_.$new();
controller = _$controller_("MockController", {
$scope: $scope
, MockService: _MockService_
});
});
});
describe("Test", function () {
it("Should be Bangalore", function () {
$scope.getCities();
console.log($scope.places);
});
});
});
the problem is that the then method in controller is not getting called. How can I resolve the issue ?

Answer 1

Three things to fix...
Don't nest the beforeEach calls. You can init multiple modules with module.
beforeEach(function() {
module('MockApp', 'mock.service');
// and so on
Your mock data does not quite match what you'd see from an $http based promise response
return $q.when({data: mydata});
In order to process promises, you need to trigger a digest cycle
it("Should be Bangalore", function() {
$scope.getCities();
$scope.$apply();
console.log($scope.places);
});