Unknown Provider: $scopeProvider When Testing Angular Controller With Jasmine - javascript

I am trying to implement unit testing for a particular controller of a web app using Jasmine and Karma. At the moment it is giving the following error:
Chrome 53.0.2785 (Mac OS X 10.10.5) HomeCtrl should be defined FAILED
Error: [$injector:unpr] Unknown provider: $scopeProvider <- $scope
http://errors.angularjs.org/1.5.5/$injector/unpr?p0=%24scopeProvider%20%3C-%20%24scope
Here is the code of the testing file:
describe('HomeCtrl', function(){
var $controller, HomeCtrl;
beforeEach(angular.mock.module('TestModule'));
beforeEach(inject(function(_$controller_, _$rootScope_, _$scope_) {
$controller = _$controller_;
rootScope = $rootScope.new();
scope = $scope.new();
HomeController = $controller('HomeCtrl', {
$scope: scope
});
}));
// Verify our controller exists
it('should be defined', function() {
expect(HomeController).toBeDefined();
});
});
Could someone tell me what I am doing wrong?

In AngularJS, all scopes are children of $rootScope.
In unit tests, you cannot inject $scope since, there is no service that exists. But there is an $rootScope provider which contains API like $new to create a new child scope.
$rootScope.$new(), create a new child scope.
Since, you cannot inject $scope you are getting (no such provider exists to provide you $scope)
Error: [$injector:unpr] Unknown provider: $scopeProvider <- $scope
In the answer, you have provided,
beforeEach(inject(function(_$controller_, _$rootScope_) {
$controller = _$controller_;
$rootScope = _$rootScope_;
HomeCtrl = $controller('HomeCtrl', {
$scope: $rootScope,
});
}));
You are injecting $rootScope and directly passing the $rootScope to HomeCtrl. It works, but while executing tests it adds all variables and function in controller code to $rootScope.
But in real scenario, your HomeCtrl is expecting a $scope(child scope). So, to replicate the actual scenario, it would be better if you pass a child scope.
beforeEach(inject(function(_$controller_, _$rootScope_) {
$controller = _$controller_;
$scope = _$rootScope_.$new();
HomeCtrl = $controller('HomeCtrl', {
$scope: $scope,
});
}));

The following code succeeds:
describe('HomeCtrl', function(){
var $controller, HomeCtrl;
var $rootScope, $scope;
beforeEach(angular.mock.module('TestModule'));
beforeEach(inject(function(_$controller_, _$rootScope_) {
$controller = _$controller_;
$rootScope = _$rootScope_;
HomeCtrl = $controller('HomeCtrl', {
$scope: $rootScope,
});
}));
// Verify our controller exists
it('should be defined', inject(function($controller) {
expect(HomeCtrl).toBeDefined();
}));
});

Related

uibModal provider unknown unitTest

I'm starting to learn how to do unitTesting with jasmine. I read a lot of in internet and SO but I can't solve my problem.
I have a directive which has a controller. That controller is using the service $uibModal to open a modal when I click an element. I'm trying to inject that service from my test but I can't. I read a lot of threads saying that I must pass an instance. I'm trying to do so but I can't. Please any help will be appreciated.
.controller('myController', ['$scope', '$uibModal', function($scope, $uibModal){
var self = this;
//OTHER CODE
self.openMyModal = function(dataInput) {
var modalInstance = $uibModal.open({
animation: true,
bindToController: true,
templateUrl: 'app/myComponent/modals/component-modal.html',
controllerAs: 'componentModalCtrl',
controller: 'componentModalController',
windowClass: 'semi-modal semi-modal--large',
scope: $scope
})
}
//OTHER CODE
}
This is the test where I'm trying to mock this modal.
beforeEach(function(){
angular.mock.module('templates');
angular.mock.module('app.components.myComponent');
angular.mock.inject(function($compile, $rootScope, $templateCache, $controller){
scope = $rootScope;
modalInstance = { close: function(){}, dismiss: function(){}, open: function(){}
};
//Initializing element and doing compile and digest
controller = $controller('myController', {$scope: scope, $uibModal: modalInstance});
})
I'm getting the error
Unknown provider: $uibModalProvider <- $uibModal.
Can I inject this service in another way? What I'm doing wrong?
P.S: I have read this Testing AngularUI Bootstrap modal instance controller
Angular ui bootstrap $uibModalInstance breaks down unit tests
Mocking $modal in AngularJS unit tests
Try this one:
beforeEach(module(function ($provide) {
$provide.service("$uibModal", function () {
// mock methods here
});
}));
Finally I solved it. It was a silly error. I imported an additional module that I was missing in my tests. After that I could mock my service and use it without any problem like this.
angular.mock.inject(function($compile, $rootScope, $templateCache, $controller, $uibModal){
scope = $rootScope;
uibModal = $uibModal;
element = angular.element('<directive-tree input-tree=inputTree subsystem=subsystem></directive-tree>');
$compile(element)(scope);
scope.$digest();
controller = $controller('directiveTreeController', {$scope: scope, $uibModal: uibModal});
});

When adding scope to the Angular-Seed default View Controllers the test suite now fails

Using a fresh clone of angular-seed I am attempting some BDD and have added the following tests and code. However, once I add the $scope to the controller, the suite fails on the expect(view1Ctrl).toBeDefined(); expectation.
Below is the only addition I've made and it causes the noted failure when Karma runs.
app/view1/view1.js
.controller('View1Ctrl', ['$scope', function($scope) {
$scope.name = "Name";
}]);
in your test (view1_test.js) you need to inject $scope into the controller...
describe('myApp.view1 module', function() {
beforeEach(module('myApp.view1'));
describe('view1 controller', function(){
it('should ....', inject(function($controller, $rootScope) {
//spec body
var $scope = $rootScope.$new();
var view1Ctrl = $controller('View1Ctrl', {$scope: $scope});
expect(view1Ctrl).toBeDefined();
}));
});
});

Angular Unit Test: Unknown provider: $$qProvider <- $$q <- $interval

I'm trying to set up unit tests for an existing Angular JS project, but I keep getting the error in the title:
Unknown provider: $$qProvider <- $$q <- $interval
Here is my unit test:
describe("screen controller", function(){
beforeEach(module('tsApp'));
var scope, createController, $interval, $timeout, $translate, $sce, $controller;
beforeEach(inject(function(_$controller_, $rootScope, _$interval_, _$timeout_, _$translate_, _$sce_ ){
// The injector unwraps the underscores (_) from around the parameter names when matching
$interval = _$interval_;
$timeout = _$timeout_;
$translate = _$translate_;
$sce = _$sce_;
$controller = _$controller_;
scope = $rootScope.$new();
createController = function() {
return $controller('screenCtrl', {
'$scope' : scope,
'$interval' : $interval,
'$timeout' : $timeout,
'$translate' : $translate,
'$sce' : $sce
});
};
}));
describe('first test', function() {
it('it runs without error!', function() {
var controller = createController();
expect(true).toEqual(true);
});
});
});
And the controller I'm trying to test starts like this:
var screenCtrl = tsApp.controller('screenCtrl', function($scope, updateService, $translate, $sce, $interval, $timeout) {
I'm guessing there is something wrong with the dependancies I'm injecting. Thanks in advance.
$$qProvider was introduced in AngularJS 1.3.0-beta.14. It is undocumented and used internally.
Prior to this version $IntervalProvider used $q and in beta.14 and later it uses both $q and $$q.
Somewhere you have conflicting versions of AngularJS modules.
Check all your files or for example your Bower components.
Make sure your core AngularJS version is high enough for other modules you might be using. Angular Material for example requires Angular 1.3.x.

How to test a directive's controller using angularJS-karma-jasmine?

Goal:
Write a passing test for the waCarousel directive scope variable: self.awesomeThings. Expect this test pass when self.awsomeThings.length.toBe(3) to is true?
Question:
How can I properly write this test? rather how do I inject a directives controller?
Directive:
angular.module('carouselApp')
.directive('waCarousel', function() {
return {
templateUrl: '../../../views/carousel/wa.carousel.html',
controller: function($scope) {
var self = this;
self.awesomeThings = [1, 2, 3];
return $scope.carousel = self;
}
}
});
Unit Test:
describe('waCarousel Unit', function() {
// am I missing a $controller & namespace variable init?
var $compile,
$rootScope;
// Load the myApp module, which contains the directive
beforeEach(module('carouselApp'));
// Store references to $rootScope and $compile and $controller
// so they are available to all tests in this describe block
beforeEach(inject(function(_$compile_, _$rootScope_, _$controller_){
// The injector unwraps the underscores (_) from around the parameter names when matching
$compile = _$compile_;
$rootScope = _$rootScope_;
$controller = _$controller_;
// WaCarouselCtrl = $controller('WaCarouselCtrl', {
// $scope: scope
// });
}));
it('should have a list of awesomeThings', function() {
// This wont pass
expect(scope.awesomeThings.length).toBe(3);
});
});
This is how I would do it for a typical view and not directive:
describe('Controller: MainCtrl', function() {
// load the controller's module
beforeEach(module('carouselApp'));
var MainCtrl,
scope;
// Initialize the controller and a mock scope
beforeEach(inject(function($controller, $rootScope) {
scope = $rootScope.$new();
// !!*** this is how I would inject the typical controller of a view **!! //
MainCtrl = $controller('MainCtrl', {
$scope: scope
});
}));
it('should attach a list of awesomeThings to the scope', function() {
expect(scope.awesomeThings.length).toBe(3);
});
});
How do I merge these two concepts so that I can expect self.awesomeThings.length).toBe(3)?
UPDATE:
Compile the element, and after calling $digest(), you will have access to the scope which contains carousel object with awesomeThings array:
describe('waCarousel Unit', function() {
var scope;
beforeEach(module('carouselApp'));
beforeEach(inject(function($rootScope, $compile) {
var element = '<test></test>';
scope = $rootScope.$new();
element = $compile(element)(scope);
scope.$digest();
}));
it('should have a list of awesomeThings', function() {
expect(scope.carousel.awesomeThings.length).toBe(3);
});
});
Also, here are some useful links to testing directives in angular:
Testing Directives
Testing AngularJS directive controllers with Jasmine and Karma
Introduction to Unit Test: Directives

AngularJS Karma test - Resolve object passed into controller is undefined when testing

We are using ui-router 0.2.10.
I am injecting a resolve object as a parameter into my controller, which is then setting a scope variable in the controller. It works perfectly on the app like so:
state provider
$stateProvider.state('myState', {
resolve:{
foo: function(){
return 'bar';
},
url: '/',
templateUrl: 'index.html',
controller: 'FooCtrl'
})
controller
app.Controllers.controller('FooCtrl', ['$scope', '$state', 'foo',
function ($scope, $state, $log, Zone, foo) {
$scope.testVar = foo
console.log($scope.testVar);
}])
'Bar' is then logged to the console as expected in Chrome.
But when running tests using Karma, the resolve object is now undefined, which fails the test. Here is the test code:
describe('controllers', function(){
var $rootScope,
$scope,
$state
beforeEach(module('app'))
beforeEach(inject(function($injector) {
$state = $injector.get('$state')
$rootScope = $injector.get('$rootScope')
$scope = $rootScope.$new()
$controller = $injector.get('$controller')
}))
it('FooCtrl should exist', inject( function() {
$state.go('myState')
$rootScope.$apply()
$controller = $controller('FooCtrl', {
'$scope': $scope
})
$rootScope.$apply()
assert.equal($scope.testVar, "bar", "these strings are equal")
}))
})
This error is presented (the resolve object in my case is called resolvedRouteModels):
[$injector:unpr] Unknown provider: fooProvider <- foo
http://errors.angularjs.org/1.3.0-build.2921+sha.02c0ed2/$injector/unpr?p0=fooProvider%20%3C-%20foo
Any help would be much appreciated, and please let me know if you have encountered this problem.
When you instantiate your controller, Angular usually can figure out how to satisfy the controller's dependencies. In this case, it doesn't know about UI-Router's "resolve" functionality.
One way to address this is to supply this dependency yourself in the test, the same way you are passing in the scope to the controller:
var foo = 'bar'; // whatever
$controller = $controller('FooCtrl', {$scope: $scope, foo: foo} );
Note, you could also create a mock $state object and pass that into the controller the same way, if you wanted to incorporate that into your tests.
my assumption is your Angular set up is perfect, if that's the case, you might want to test your code this way. I've used Jasmine 2 syntax.
describe('Foo Controller', function() {
var $scope, $state, controller, Zone, foo, $log;
beforeEach(module('app'));
beforeEach(inject(function($controller) {
$scope = {};
$state = {};
$log = {};
Zone = {};
foo = {};
controller = $controller;
}));
it('should log the value foo', function() {
spyOn(console, 'log');
controller('FooCtrl', { $scope, $state, $log, Zone, foo });
expect($scope.testVar).toEqual({});
expect(console.log).toHaveBeenCalledWith({});
});
it('should log the value foo', function() {
spyOn(console, 'log');
// You could change the value of foo i.e.
foo = 'create more spies than fbi';
controller('FooCtrl', { $scope, $state, $log, Zone, foo });
expect($scope.testVar).toEqual('create more spies than fbi');
expect(console.log).toHaveBeenCalledWith('create more spies than fbi');
});
});
Once again I hope this helps. Peace.

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