A guide on crafting a test scenario for an AngularJS controller using the Jasmine framework

I recently created an angular module called userModule.js

'use strict';
angular.module('users', ['ngRoute','angular-growl','textAngular','ngMaterial','ngMessages','ngImgCrop','ngFileUpload'])
.run(function ($rootScope, $location, $http) {
    $http.get('/token')
        .success(function (user, status) {
        if (user) {
            $rootScope.user = user;
        }
    });
})

In another file, I have a controller that relies on this module:

userController.js

'use strict';
var usersApp = angular.module('users');

usersApp.controller('usersControllerMain', ['$scope', '$http', '$routeParams','$location', 'growl','$rootScope','$mdDialog','API',
  function($scope, $http, $routeParams, $location,growl,$rootScope,$mdDialog,API) {
    $scope.action = "none";
    $scope.password = '',
    $scope.grade = function() {
      var size = $scope.password.length;
      if (size > 8) {
        $scope.strength = 'strong';
      } else if (size > 3) {
        $scope.strength = 'medium';
      } else {
        $scope.strength = 'weak';
      }
    };

I have also defined some dependencies in my controller for other functionalities.

Now, I want to test this controller. So, I have written a spec file that can be run directly in the browser without using test runners like karma: jasmine.html

<html>
<head>
    <link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/jasmine/2.4.1/jasmine.css">
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jasmine/2.4.1/jasmine.js"></script>
    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jasmine/2.4.1/jasmine-html.js"></script>
    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jasmine/2.4.1/boot.js"></script>
    <script type="text/javascript" src="https://code.angularjs.org/1.4.8/angular.js"></script>
    <script type="text/javascript" src="https://code.angularjs.org/1.4.8/angular-mocks.js"></script>
    <script type="text/javascript">
    describe('userControllerMain testing', function(){

      beforeEach(angular.mock.module('users'));

      var $controller;

      beforeEach(angular.mock.inject(function(_$controller_){
            $controller = _$controller_;
        }));
          describe('$scope.grade', function() {
            it('sets the strength to "strong" if the password length is >8 chars', function() {
                var $scope = {};
                var controller = $controller('usersControllerMain', { $scope: $scope });
                $scope.password = 'longerthaneightchars';
                $scope.grade();
                expect($scope.strength).toEqual('strong');
            });
          });
        });
    </script>
</head>
<body>
</body>
</html>

I found this example in the Angular documentation. However, when I try to run jasmine.html in my browser, I encounter an injector module error as shown here: https://i.stack.imgur.com/PaIxj.jpg. Am I making a mistake somewhere?

Answer №1

It's crucial to adjust the testing approach you're using in order to achieve the desired results. Instead of mocking the controller within an it block, it's recommended to do so inside a beforeEach block.

Here is how your test file should look like:

describe('userControllerMain testing', function(){
    beforeEach(module('users'));

    beforeEach(inject(function($controller, $rootScope) {
        $scope = $rootScope.$new();

        usersControllerMain = $controller('usersControllerMain', {
            $scope: $scope
        });
    }));

    describe('$scope.grade', function() {
        it('should set the strength to "strong" when the password length is greater than 8 characters', function() {
            $scope.password = 'longerthaneightchars';
            $scope.grade();
            expect($scope.strength).toEqual('strong');
        });
    });
});

I trust this will provide assistance for your issue.

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