SetuponError_Bug

components.my-component\.js

import Component from '@glimmer/component';
import { action } from '@ember/object';
import { assert } from '@ember/debug';

export default class TestComp extends Component {
  // constructor() {
  //   super(...arguments)
  //   assert('testValue must be passed in', this.args.testValue);
  // }
  
  @action
  testAction() {
    assert('testValue must be passed in', this.args.testValue);
  }
}

controllers.application\.js

import Controller from '@ember/controller';

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

templates.application\.hbs

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

templates.components.my-component\.hbs

<button {{on "click" this.testAction}} data-test-button="true"></button>

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

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

module(
  'Integration | Component | test-component',
  function (hooks) {
    setupRenderingTest(hooks);

    test('it renders', async function (assert) {
      assert.expect(1);

      setupOnerror((e) => {});
      await render(hbs`<MyComponent />`);
	    await click('[data-test-button]');
      
      assert.ok('Test Successfull');
    });
  }
);

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();

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": "3.18.1",
    "ember-template-compiler": "3.18.1",
    "ember-testing": "3.18.1"
  },
  "addons": {
    "@glimmer/component": "1.0.0"
  }
}