Ember 2.18 - Not possible to test instance-initializers

[Exelord]

Hey,
as from 2.18 it is not possible to test instance initializers using current blueprint.
There are 2 errors:

1. Creating Application

Error: Assertion Failed: You cannot make a new Ember.Application using a root element that is an ancestor of an existing Ember.Application

2. Booting Application
   When we built app instance application.buildInstance() it automatically boots app and fires the tested instance-initializer. So because of that, we are not able to prepare the test eg by registering own containers before running the initializer.

[rwjblue]

Please provide a reproduction, this should absolutely be possible so maybe there is an error in the specific test in question...

[Exelord]

1. Code

export function initialize(appInstance) {
  let loggerService = appInstance.lookup('service:logger');
  return loggerService.get('enabled');
}

export default {
  initialize
};

2. Test

import Application from '@ember/application';
import { run } from '@ember/runloop';
import { initialize } from 'dummy/instance-initializers/my-init';
import { module, test } from 'qunit';
import destroyApp from '../../helpers/destroy-app';

import EmberObject from '@ember/object';

module('Unit | Instance Initializer | my init', {
  beforeEach() {
    run(() => {
      this.application = Application.create();
      this.appInstance = this.application.buildInstance();
    });
  },
  afterEach() {
    run(this.appInstance, 'destroy');
    destroyApp(this.application);
  }
});

test('it should return true', function(assert) {
  this.appInstance.register('service:logger', EmberObject.extend({enabled: true}))
  assert.ok(initialize(this.appInstance));
});

3. Error

What happened

The buildInstace booted the app before the tests so it was not possible to mock service first.

Real issue

EmberExperts/ember-rollbar-client#24

[Serabe]

Yes, you can. See https://github.com/Serabe/ember-issue-16216

You need to use a Service to register a service.

Closing this.

Thank you!

[Exelord]

@Serabe Could you try with the latest ember 2.18? on 2.16 it works perfectly.
After this change Im still getting an error
Assertion Failed: You cannot make a new Ember.Application using a root element that is an ancestor of an existing Ember.Application

And also, I forgot to mention: this happening for me on an addon project.

[Exelord]

I think this is related with new rfc: https://github.com/emberjs/ember.js/blob/master/blueprints/instance-initializer-test/qunit-rfc-232-files/tests/unit/instance-initializers/__name__-test.js

[andrewtimberlake]

Needs reproduction: I get the error Promise rejected during "it works": Assertion Failed: You cannot make a new Ember.Application using a root element that is an ancestor of an existing Ember.Application if I create a new Ember app using 3.1.4, ember g instance-initializer my-initializer and then running ember t

[stopdropandrew]

If you remove the setupTest(hooks); it should work, no need to create two applications.

[ziali088]

@stopdropandrew that worked and makes sense, thanks! (version 3.2)