Testing Models

Unit testing methods and computed properties follows previous patterns shown in Unit Testing Basics because DS.Model extends Ember.Object.

Ember Data Models can be tested using the moduleForModel helper.

Let's assume we have a Player model that has level and levelName attributes. We want to call levelUp() to increment the level and assign a new levelName when the player reaches level 5.

App.Player = DS.Model.extend({
  level:     DS.attr('number', { defaultValue: 0 }),
  levelName: DS.attr('string', { defaultValue: 'Noob' }),

  levelUp: function() {
    var newLevel = this.incrementProperty('level');
    if (newLevel === 5) {
      this.set('levelName', 'Professional');      
    }
  }
});

Now let's create a test which will call levelUp on the player when they are level 4 to assert that the levelName changes. We will use moduleForModel:

moduleForModel('player', 'Player Model');

test('levelUp', function() {
  // this.subject aliases the createRecord method on the model
  var player = this.subject({ level: 4 });

  // wrap asynchronous call in run loop
  Ember.run(function() {
    player.levelUp();
  });

  equal(player.get('level'), 5);
  equal(player.get('levelName'), 'Professional');
});

Live Example

Testing Relationships

App.Profile = DS.Model.extend({});

App.User = DS.Model.extend({
  profile: DS.belongsTo('profile')
});

moduleForModel('user', 'User Model', {
  needs: ['model:profile']
});

test('profile relationship', function() {
  var User = this.store().modelFor('user');
  var relationship = Ember.get(User, 'relationshipsByName').get('profile');

  equal(relationship.key, 'profile');
  equal(relationship.kind, 'belongsTo');
});

Live Example