Component Test

components.str-header.js

import Ember from 'ember';

export default Ember.Component.extend({

  actions: {
  	changeTitle() {
    	this.set('title', 'clicked!');
    }
  }
  
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  title: 'Component Title'
  
});

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}

templates.application.hbs

{{str-header
		title=title
}}

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

templates.components.str-header.hbs

<div class="str-header">
	<h1>{{title}}</h1>
  <button onclick={{action 'changeTitle'}} class="button">Click Me</button>
</div>

tests.helpers.destroy-app.js

import Ember from 'ember';

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

tests.helpers.resolver.js

import Resolver from '../../resolver';
import config from '../../config/environment';

const resolver = Resolver.create();

resolver.namespace = {
  modulePrefix: config.modulePrefix,
  podModulePrefix: config.podModulePrefix
};

export default resolver;

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 = assign(attributes, attrs); // use defaults, but you can override;

  run(() => {
    application = Application.create(attributes);
    application.setupForTesting();
    application.injectTestHelpers();
  });

  return application;
}

tests.integration.components.str-header-test.js

import { moduleForComponent, test } from 'ember-qunit';
import hbs from 'htmlbars-inline-precompile';

moduleForComponent('str-header', 'TODO: put something here', {
  integration: true
});

test('it renders', function(assert) {

  // Set any properties with this.set('myProperty', 'value');
  // Handle any actions with this.on('myAction', function(val) { ... });

  this.render(hbs`{{str-header}}`);

  assert.ok(this.$('.str-header')[0]);
});

test('it has a title', function(assert) {
  
  this.set('title', 'STR');

  // Set any properties with this.set('myProperty', 'value');
  // Handle any actions with this.on('myAction', function(val) { ... });

  this.render(hbs`{{str-header title=title}}`);

  assert.equal(this.$('h1').text(), 'STR');
});

test('has click event', function (assert) {
    this.set('title', 'STR');

    // Mock handler in controller
    this.set('clickedController', () => {
        this.set('title', 'clicked!');
    });

    // Set any properties with this.set('myProperty', 'value');
    // Handle any actions with this.on('myAction', function(val) { ... });

    this.render(hbs`{{str-header title=title clicked=(action clickedController)}}`);   

    this.$('.str-header').find('.button').click();    

    assert.equal(this.$('.str-header').find('h1').text(), 'clicked!');
  
});

tests.test-helper.js

import resolver from './helpers/resolver';
import {
  setResolver
} from 'ember-qunit';

setResolver(resolver);

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}