Ember Twiddle - Ember.testing not set during imports

components.my-component.js

import Ember from 'ember';

const kIsTesting = Ember.testing;

export default Ember.Component.extend({
	loadedEmberTestingValue: kIsTesting,
	emberTestingCompFunc: Ember.computed('',function() {
		return Ember.testing;
	})
});

controllers.application.js

import Ember from 'ember';

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

Ember Testing bug - Ember.testing not set in imports.md

This gist is an Ember Twiddle to demonstrate the problem in ember-testing where the "Ember.testing" flag is not set during imports.

See Ember issue #16006 at emberjs/ember.js#16006

templates.application.hbs

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

templates.components.my-component.hbs

{{loadedEmberTestingValue}}
/
{{emberTestingCompFunc}}

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.integration.components.my-component-test.js

import Ember from 'ember';
import { moduleForComponent, test } from 'ember-qunit';
import hbs from 'htmlbars-inline-precompile';

moduleForComponent('my-component', 'Ember.testing', {
  integration: true
});

test('Ember.testing', function(assert) {

  assert.ok(Ember.testing,'Ember.testing is set to true when inside test method');
  
  // Set any properties with this.set('myProperty', 'value');
  // Handle any actions with this.on('myAction', function(val) { ... });

  this.render(hbs`{{my-component}}`);

  assert.equal(this.$().text().trim(), 'true\n/\ntrue', 'Ember.testing is set to true when initializing component');

});

tests.test-helper.js

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

setResolver(resolver);

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": true
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}