Testing Action Errors

controllers.application.js

import Ember from 'ember';

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

templates.application.hbs

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

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

import { module, test } from 'qunit';
import { setupRenderingTest } from 'ember-qunit';
import { render, click } from '@ember/test-helpers';
import hbs from 'htmlbars-inline-precompile';

module('Integration | Component | my component', function(hooks) {
  setupRenderingTest(hooks);
  
  hooks.beforeEach(function() {
    this.testError = () => { throw new Error('bork'); };
  });
  
  test('it renders', async function(assert) {
    await render(hbs`<button id="test-button" {{action this.testError}}/>`);
    try {
      await click('#test-button');
      assert.ok(false, 'expected clicking to throw an error');
    } catch (error) {
      assert.ok(true);
    }
  });
});

tests.test-helper.js

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

setApplication(Application.create(config.APP));
start();

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "ENV": {
  	"APP": {
      "autoboot": false
    }
  },
  "options": {
    "use_pods": false,
    "enable-testing": true
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}