Stub Controller in Route Unit Test

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  setupController(controller, model) {
    this._super(...arguments);
    controller.set('myProp', 'test');
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
<br>
<br>

tests.helpers.resolver.js

import Resolver from '../../resolver';
import config from '../../config/environment';

const resolver = Resolver.create();

resolver.namespace = {
  modulePrefix: config.modulePrefix,
  podModulePrefix: config.podModulePrefix
};

export default resolver;

tests.test-helper.js

import resolver from './helpers/resolver';
import {
  setResolver
} from 'ember-qunit';

setResolver(resolver);

tests.unit.routes.application-test.js

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

moduleFor('route:application', 'Application Route', {
  // Specify the other units that are required for this test.
  // needs: ['controller:application']
});

test('setupController sets properties on controller', function(assert) {
  // Stub out the controller as an Ember.Object
  const controller = Ember.Object.create();
  // Set a prop on that instance
  controller.set('aProp', 'testing'); 
  
  let route = this.subject();
  // Assign our stub as the route's controller
  route.controller = controller;
  
  // Explicitly call setupController with our stub
  route.setupController(controller);
  
  
  assert.equal(route.controller.get('aProp'), 'testing');
  //This prop is set from setupController
  assert.equal(route.controller.get('myProp'), 'test');
});

twiddle.json

{
  "version": "0.10.4",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": true
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.6.2",
    "ember-data": "2.6.2",
    "ember-template-compiler": "2.6.2"
  },
  "addons": {
  }
}