closure action right way!

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
});

components.my-component2.js

import Ember from 'ember';

export default Ember.Component.extend({
  click() {
  	this.attrs.testAction('from click!');
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  actions: {
  	testAction(){
    	console.log('yay', ...arguments);
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{my-component testAction=(action 'testAction')}}
<br>

templates.components.my-component.hbs

{{my-component2 testAction=(action testAction 2)}}

templates.components.my-component2.hbs

 <button {{action (action testAction 1)}}>My Button</button>

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"
  }
}