Hanging Route Test

controllers.application.js

import Ember from 'ember';

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

controllers.route-a.js

import Ember from 'ember';
import { set } from '@ember/object';

export default Ember.Controller.extend({
  queryParams: ['test', 'type'],
  actions: {
    changeParam() {
      set(this, 'test', '2');
    }
  }
});

router.js

import EmberRouter from '@ember/routing/router';
import config from './config/environment';

const Router = EmberRouter.extend({
  location: 'none',
  rootURL: config.rootURL
});

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

export default Router;

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  async model() {
    const { status } = await fetch('https://jsonplaceholder.typicode.com/todos/1', { mode: 'no-cors'});
    return  status;
  },
});

routes.route-a.js

import Ember from 'ember';
import { next } from '@ember/runloop';
import { set } from '@ember/object';

export default Ember.Route.extend({
  queryParams: { test: { refreshModel: true }, type: { refreshModel: true } },
  async model() {
    const rootID = this.modelFor('application');
    const { status } = await fetch(`'https://jsonplaceholder.typicode.com/todos/${rootID}`, { mode: 'no-cors' });
    return  { status };
  },
  afterModel(model, transition) {
    this._super(model, transition);
    set(model, 'test', '3');
    set(model, 'type', 'other');
    1 + 1;
  },
  setupController(controller, model) {
    this._super(controller, model)
    next(() => {
      this.transitionTo({ queryParams: { test: '1', type: 'none' } });
    });
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{#link-to 'route-a'}}Route A{{/link-to}}
{{outlet}}
<br>
<br>

templates.route-a.hbs

some text

{{model.status}}

<button id="clickMe" {{action "changeParam"}}>this is a button</button>

tests.acceptance.route-a-hanging-test.js

import { test } from 'qunit';
import moduleForAcceptance from '../../tests/helpers/module-for-acceptance';

moduleForAcceptance('TODO: put something here');

test('visiting /route-a-hanging', async function(assert) {
  await visit('/route-a');
  
  assert.equal(currentURL(), '/route-a?test=1&type=none');
  
  await click('#clickMe');

  assert.equal(currentURL(), '/route-a?test=2&type=none');
});

tests.helpers.destroy-app.js

import { run } from '@ember/runloop';

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

tests.helpers.module-for-acceptance.js

import { module } from 'qunit';
import { resolve } from 'rsvp';
import startApp from '../helpers/start-app';
import destroyApp from '../helpers/destroy-app';

export default function(name, options = {}) {
  module(name, {
    beforeEach() {
      this.application = startApp();

      if (options.beforeEach) {
        return options.beforeEach.apply(this, arguments);
      }
    },

    afterEach() {
      let afterEach = options.afterEach && options.afterEach.apply(this, arguments);
      return resolve(afterEach).then(() => destroyApp(this.application));
    }
  });
}

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

let attributes = assign({ rootElement: '#main' }, config.APP);
setApplication(Application.create(attributes));

start();

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": true
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.1.4",
    "ember-template-compiler": "3.1.4",
    "ember-testing": "3.1.4"
  },
  "addons": {
    "ember-data": "3.0.4"
  }
}