Ember Mock Service

route-test.js

import Ember from 'ember';
import { moduleFor, test } from 'ember-qunit';

let mockSession = Ember.Service.extend({
  isAuthenticated: true,
  currentUser: Ember.computed('isAuthenticated', function() {
    return  Ember.RSVP.Promise(function(resolve) {
      resolve( Ember.Object.create({ accounts: [] }) );
    });
  })
});

moduleFor('route:accounts', 'Unit | Route | accounts', {
  // Specify the other units that are required for this test.
  needs: [/*'service:session',*/],

  beforeEach() {
    this.container.register( 'service:session', mockSession );
    this.container.injection( 'route:accounts', 'session', 'service:session' );
  }
});

test('it returns a collection of user accounts', function(assert) {
  let route = this.subject();
  assert.deepEqual(route.model()._result, []);
});

route.js

import Ember from 'ember';

export default Ember.Route.extend({
  session:   Ember.inject.service(),

  model() {
    return new Ember.RSVP.Promise(resolve => {
      this.get( 'session.currentUser' )
        .then( user => user.get('accounts').then(resolve) );
    });
  }
});