Having trouble locating my controller during my AngularJS test

Encountered an issue with testing controllers that are loaded dynamically in my AngularJS application. The controllers are written as follows:

angular.module('myApp').controllerProvider.register('DashboardCtrl', [
    '$scope', function ($scope) {
        $scope.foo = 'bar';
    }
]);

The module is initialized like this:

var app = angular.module('myApp', [
    'ngRoute',
    'ngCookies',
    'ngResource',
    'ngSanitize',
    'ui.router'
]);

app.run([
    '$rootScope', '$state', '$stateParams',
    function ($rootScope, $state, $stateParams) {
        $rootScope.$state = $state;
        $rootScope.$stateParams = $stateParams;
    }
]);

app.config(function ($stateProvider, $urlRouterProvider, $controllerProvider, $compileProvider, $filterProvider, $provide) {
    // Configuration code here
});

Everything seems to be set up correctly based on the lazy loading method outlined here. However, when attempting to run tests, the following error is encountered: Error: [ng:areq] Argument 'DashboardCtrl' is not a function, got undefined.

The test script used is shown below:

describe('Controller: DashboardCtrl', function () {
    'use strict';

    var DashboardCtrl,
        scope;

    beforeEach(function () {
        // Setup testing environment
    });

    it('should attach a list of awesomeThings to the scope', function () {
        // Test cases go here
    });
});

If anyone has any insights or solutions on what might be causing this error during testing, your help would be greatly appreciated. Thank you in advance.

Answer №1

Not entirely certain if Karma is compatible with Script.js loading, but it definitely supports Require.js.

If you followed the tutorial mentioned, did you take a look at the final example on github (which also includes unit testing)? The concept is to transition everything to utilize Require.js instead of Script.js and utilize Karma along with karma-requirejs for testing purposes.

While it's not overly complex, there are numerous adjustments needed. I won't provide the code here, but I recommend checking out these resources: and

I can't share a direct link to the final example due to reputation constraints, but it can be found towards the end of the tutorial you referred to.

To explore a functional demonstration utilizing Asynchronous Module Definitions with RequireJS, take a look at the sample app."

Answer №2

Instead of loading modules, you can override the angular modules in this example:

 var app = angular.module('cellierApp', [
    'ngRoute',
    'ngCookies',
    'ngResource',
    'ngSanitize',
    'ui.router'
  ]);

The correct way to call it would be:

beforeEach(function() {
    // the module to be tested
    module('cellierApp');
});

In my opinion, the variable declaration of the app is not optimal. Rather than having Angular as a container and using it, avoid creating unnecessary objects on the global closure. Update this part:

var app = angular.module('myApp', [
    'ngRoute',
    'ngCookies',
    'ngResource',
    'ngSanitize',
    'ui.router'
]);

app.run...

To:

angular.module('myApp', [
        'ngRoute',
        'ngCookies',
        'ngResource',
        'ngSanitize',
        'ui.router'
    ])
.config([...

.run([....

The unit test itself can be simplified significantly:

describe('Controller: DashboardCtrl', function() {
    'use strict';

    var scope;

    // load the controller's module
    beforeEach(function() {
        module('cellierApp');
    });

    beforeEach(inject(function($controller, $rootScope) {
        scope = $rootScope.$new();
        $controller('DashboardCtrl', {
            $scope: scope
        });
    }));

    it('should attach a list of awesomeThings to the scope', function() {
        expect(scope.foo).toBeDefined();
        expect(scope.foo).toBe('bar');
    });
});

Answer №3

Ensure to include your controller registration in your test script

Add the following code snippet to create your controller within your test:

app.controllerProvider.register('DashboardCtrl', [
    '$scope', function ($scope) {
        $scope.foo = 'bar';
    }
]);

Depending on your test environment, make sure your app and controller files are loaded correctly using:

beforeEach(module('cellierApp'));

Instead of directly creating your app within your test script.

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