ed race cond

controllers.application\.js

import Controller from '@ember/controller';
import { inject as service } from '@ember/service';

export default class ApplicationController extends Controller {
  appName = 'Ember Twiddle';
}

models.course\.js

import Model from 'ember-data/model';

import attr from 'ember-data/attr';
import { belongsTo, hasMany } from 'ember-data/relationships';

export default class extends Model {
  @attr('string') title;
}

templates.application\.hbs

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

tests.test-helper\.js

import Application from '../app';
import config from '../config/environment';
import { setApplication } from '@ember/test-helpers';
import { assign } from '@ember/polyfills';
import { start } from 'ember-qunit';

let attributes = {
  rootElement: '#test-root',
  autoboot: false
};
attributes = assign(attributes, config.APP);

let application = Application.create(attributes);
setApplication(application);

start();

tests.unit.services.store-test\.js

import { module, test } from 'qunit';
import { setupTest } from 'ember-qunit';

import Pretender from 'pretender';

module('TODO: put something here', function(hooks) {
  setupTest(hooks);

  test('services/store/with-socks :: race condition: no ember-data issue', async function(assert) {
    const store = this.owner.lookup('service:store');

    const socksPublishContext = {
      channel: 'system',
      data: '{"courses": [{"id": "1", "title": "test course 1"}]}',
    };

    const serverResponse = [
      201,
      { 'Content-Type': 'application/json' },
      JSON.stringify({
        courses: [{ id: 1, title: 'test course 1' }]
      })
    ];

    let courseViaRest;
    let courseViaWS;

    const server = new Pretender(function() {
      this.post('/api/courses', (req) => {
        return new Promise(resolve => {
          //socks.onPublish(socksPublishContext);
          store.pushPayload('course', {
            courses: [{ id: 1, title: 'test course 1' }]
          });

          courseViaWS = store.peekRecord('course', 1);
          assert.equal(courseViaWS.id, '1');
          assert.equal(courseViaWS.title, 'test course 1');
          assert.equal(courseViaWS.isLoaded, true);
          assert.equal(courseViaWS.isSaving, false);

          assert.ok(courseViaRest);
          assert.notEqual(courseViaRest, courseViaWS);
          assert.equal(courseViaRest.isSaving, true);
          assert.equal(courseViaRest.id, null);

          setTimeout(() => resolve(serverResponse), 100);
        });
      });
    });

    try {
      courseViaRest = store.createRecord('course', { title: 'test course 1' });
      await courseViaRest.save();

      assert.equal(courseViaRest.id, '1');
      assert.equal(courseViaRest.title, 'test course 1');
      assert.equal(courseViaRest.isLoaded, true);

      assert.notEqual(courseViaRest, courseViaWS);
      assert.equal(courseViaWS.id, '1');
      assert.equal(courseViaWS.title, 'test course 1');
    } finally {
      server.shutdown();
    }
  });
});

twiddle\.json

{
  "version": "0.17.1",
  "EmberENV": {
    "FEATURES": {},
    "_TEMPLATE_ONLY_GLIMMER_COMPONENTS": false,
    "_APPLICATION_TEMPLATE_WRAPPER": true,
    "_JQUERY_INTEGRATION": true
  },
  "options": {
    "use_pods": false,
    "enable-testing": true
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "@glimmer/component": "1.0.0",
    "ember-data": "3.4.2",
    "ember-cli-pretender": "^3.1.1"
  }
}