New Twiddle

controllers.application.js

import Ember from 'ember';

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

services.my-service.js

import Ember from 'ember';

export default Ember.Service.extend({
  array: [],
  prop: 0
});

templates.application.hbs

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

tests.helpers.destroy-app.js

import Ember from 'ember';

export default function destroyApp(application) {
  Ember.run(application, 'destroy');
}

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.helpers.start-app.js

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

const { run } = Ember;
const assign = Ember.assign || Ember.merge;

export default function startApp(attrs) {
  let application;

  let attributes = assign({rootElement: "#test-root"}, config.APP);
  attributes = assign(attributes, attrs); // use defaults, but you can override;

  run(() => {
    application = Application.create(attributes);
    application.setupForTesting();
    application.injectTestHelpers();
  });

  return application;
}

tests.test-helper.js

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

setResolver(resolver);

tests.unit.services.my-service-test.js

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

const { run } = Ember;

moduleFor('service:my-service', 'TODO: put something here', {
});

test('array: first test', function(assert) {
  let service = this.subject();
  assert.equal(service.get('array.length'), 0, 'array is empty as default');
  run(() => {
    service.get('array').pushObject('foo');
  });
  assert.equal(service.get('array.length'), 1, 'array contains one element after pushObject');
  assert.deepEqual(service.get('array'), ['foo'], 'array contains newly pushed element');
});

test('array: second test', function(assert) {
  let service = this.subject();
  assert.equal(service.get('array.length'), 0, 'array is empty as default');
  run(() => {
    service.get('array').pushObject('bar');
  });
  assert.equal(service.get('array.length'), 1, 'array contains one element after pushObject');
  assert.deepEqual(service.get('array'), ['bar'], 'array contains newly pushed element');
});

test('property: first test', function(assert) {
  let service = this.subject();
  assert.equal(service.get('prop'), 0, 'defaults to zero');
  run(() => {
    service.incrementProperty('prop');
  });
  assert.equal(service.get('prop'), 1, 'is one after incrementing');
});

test('property: second test', function(assert) {
  let service = this.subject();
  assert.equal(service.get('prop'), 0, 'defaults to zero');
  run(() => {
    service.incrementProperty('prop');
  });
  assert.equal(service.get('prop'), 1, 'is one after incrementing');
});

twiddle.json

{
  "version": "0.11.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": true
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.10.2",
    "ember-data": "2.11.0",
    "ember-template-compiler": "2.10.2",
    "ember-testing": "2.10.2"
  },
  "addons": {}
}