EmberJS- Testing Relationships

Testing Relationships

The relationship defines how your model's relate to each other. For relationships, you need to test whether the relationship declarations are setup properly or not.

Example

<!DOCTYPE html>
<html>
   <head>
      <title>EmberJs Tesing Relationships</title>
      <link href="https://code.jquery.com/qunit/qunit-git.css" rel="stylesheet" type="text/css" />
      <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();

         //Create a subclass of 'DS.Model' for 'Car' model in the application
         App.Car = DS.Model.extend();

         App.Model = DS.Model.extend({
            car: DS.belongsTo('car')   //Use 'DS.belongsTo' to declare a one-to-one relationship between two models
         });

         //emq.globalize();
         App.setupForTesting();   //This method is used to prepare the application for testing
         App.rootElement = '#ember-testing';   //Ember.js applications's root element

         //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
         moduleForModel('model', 'Model model', {
            needs: ['model:car']
         });

         test('car relationship', function() {
            var Model = this.store().modelFor('model');   //Get the records loaded into the store
            var relationship = Ember.get(Model, 'relationshipsByName').get('car');   //A map the keys which are the relationships of a model using  'relationshipsByName' property

            //Check the values before we modify the post
            equal(relationship.key, 'car');
            equal(relationship.kind, 'belongsTo');   //Defines the value which is belongs to a particular model
         });
      </script>
   </body>
</html>

Output

Let's carry out the following steps to see how above code works −

  • Save above code in testing_relationship.htm file

  • Open this HTML file in a browser.

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