First Test

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
});

application.template.hbs

{{outlet}}
<br>
<br>

index.controller.js

import Ember from 'ember';

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

index.template.hbs

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

router.js

import Ember from 'ember';
import config from './config/environment';

var Router = Ember.Router.extend({
  location: config.locationType
});

Router.map(function() {
  this.route('tests');
});

export default Router;

tests.route.js

import Ember from 'ember';
import FirstTest from "../tests/unit/first-test";

export default Ember.Route.extend({
});

tests.template.hbs

<div id="qunit"></div>
<div id="qunit-fixture"></div>
<div id="ember-testing-container">
  <div id="ember-testing"></div>
</div>

tests.unit.first-test.js

import IndexController from "../../index/controller";

QUnit.module('first-test', {
  beforeEach() {
    this.controller = IndexController.create();
  }
});

QUnit.test("test name", function(assert) {
  assert.equal(this.controller.appName, "Ember Twiddle");
});

twiddle.json

{
  "version": "0.4.16",
  "EmberENV": {
    "FEATURES": {}
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.2.0/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember-template-compiler.js",
    "qunit": "https://cdnjs.cloudflare.com/ajax/libs/qunit/1.18.0/qunit.js",
    "qunit-css": "https://cdnjs.cloudflare.com/ajax/libs/qunit/1.18.0/qunit.css",
    "ember-qunit": "https://cdn.rawgit.com/rwjblue/ember-qunit-builds/v0.4.16/ember-qunit.js"
  }
}