EmberJS-Testing Controller Needs

Quiz
Description

Controllers can have dependencies on the other controllers by using needs.
Example

<!DOCTYPE html>
<html>
   <head>
      <title>Emberjs Controller Needs</title>
      <!-- CDN's -->
      <script src="https://cdnjs.cloudflare.com/ajax/libs/handlebars.js/3.0.1/handlebars.min.js"></script>
      <script src="https://code.jquery.com/jquery-2.1.3.min.js"></script>
      <script src="https://builds.emberjs.com/tags/v1.10.0-beta.3/ember-template-compiler.js"></script>
      <script src="https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.10.0/ember.prod.js"></script>
      <script src="https://code.jquery.com/qunit/qunit-1.18.0.js"></script>
      <script src="https://rawgit.com/rwjblue/ember-qunit-builds/master/ember-qunit.js"></script>
      <script src="https://builds.emberjs.com/release/ember.debug.js"></script>
      <script src="https://builds.emberjs.com/beta/ember-data.js"></script>
   </head>
   <body>
      <div id="qunit"></div>
      <div id="ember-testing"></div>

      <script type="text/javascript">
         //Creates an instance of Ember.Application and assign it to a global variable
         App = Ember.Application.create();

         //The 'Ember.ObjectController' is part of Ember's Controller layer
         App.IndexController = Ember.ObjectController.extend();

         //'Ember.ArrayController' provides a way to publish a collection of objects   which has some computed properties
         App.GettingController = Ember.ArrayController.extend({
            needs: 'index',
            name: Ember.computed.alias('controllers.index.name')
         });

         //These methods are used to prepare the application for testing
         //emq.globalize();
         App.setupForTesting();
         App.injectTestHelpers();

         //The 'DefaultResolver' defines the default lookup rules before consulting the container for registered items
         setResolver(Ember.DefaultResolver.create({ namespace: App }));

         //The 'moduleFor' helper is used to setup a test container
         moduleFor('controller:getting', 'Getting Controller', {

            //When we setup 'moduleFor', we need to pass an options object that has the controller's needs
            needs: ['controller:index']
         });
         test('modify the index', function() {
            //'this.subject()' is used to get an instance of the 'PostsController' and 'GettingController'
            var ctrl = this.subject(),
            indexCtrl = ctrl.get('controllers.index');

            //This is an async function and should be wrapped using 'Ember.run'
            Ember.run(function() {

               //Set a generic model on the index controller
               indexCtrl.set('model', Ember.Object.create({ name: 'Manu' }));

               //Check the values before we modify the post
               equal(ctrl.get('name'), 'Manu');

               //Modify the name of the post
               indexCtrl.get('model').set('name', 'Mike');

               //Informs that the controllers name has changed
               equal(ctrl.get('name'), 'Mike');
            });
         });
      </script>
   </body>
</html>
Output

Let's carry out the following steps to see how above code works −
Save above code in testing_cntrlNeeds.htm file
Open this HTML file in a browser.
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