Test helper

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  init() {
    this._super(...arguments);
    this.set('model', {
        launchedat: null,
        duration: 20
    });
  }
});

helpers.date.js

import Ember from 'ember';

export function date(params/*, hash*/) {
  let date = params[0],
    duration = params[1];

  if (date === null) {
    return 0;
  }
  else if (date + duration * 60 < Date.now()) {
    return 1;
  }
  return 2;
}

export default Ember.Helper.helper(date);

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
	model(){
    return {
        launchedat: null,
        duration: 20
        };
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
	{{#if (eq (date model.launchedat model.duration) 0)}}
			Heyy
	{{/if}}
{{outlet}}
<br>
<br>

twiddle.json

{
  "version": "0.10.4",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.6.2",
    "ember-data": "2.6.0",
    "ember-template-compiler": "2.6.0"
  },
  "addons": {
    "ember-truth-helpers": "1.2.0"
  }
}