https://stackoverflow.com/questions/44763048/emberjs-how-not-to-conflict-with-actions-and-events-in-components- I

components.my-child.js

import Ember from 'ember';

export default Ember.Component.extend({
  click(){
    console.log(' click from my-child');
  },
  actions:{    
    test1(){
      console.log('action click from my-child');
    }
  }
});

components.my-parent.js

import Ember from 'ember';

export default Ember.Component.extend({
  click(){
    console.log(' click event from my-parent');
  },
  actions:{
    test(){
     // console.log('event ',event);
      //event.stopPropagation();     
      console.log('action click from my-parent');
    },    
  }
});

controllers.application.js

import Ember from 'ember';

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

templates.application.hbs

{{my-parent }}

templates.components.my-child.hbs

<div {{action 'test1'}} style="width:50px;height:50px;background-color:green">
  Child
 </div>
{{yield}}

templates.components.my-parent.hbs

<div {{action 'test'}} style="width:100px;height:100px;background-color:blue">
 parent
 {{my-child }}
</div>
{{yield}}

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"
  }
}