testing

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  sum(...numbers) {
    return numbers
    .reject(isBlank)
    .reduce((acc, curr) => acc + curr, 0);
  }
});

templates.application.hbs

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

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.test-helper.js

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

setResolver(resolver);

tests.unit.controllers.application-controller-test.js

import { moduleFor, test } from 'ember-qunit';

moduleFor('controller:application', 'application controller', {
  // Specify the other units that are required for this test.
  // needs: ['controller:foo']
});

// Replace this with your real tests.
test('#adds numbers', function(assert) {
  let controller = this.subject();
  assert.equal(controller.sum(1,2,3), 6);
  assert.equal(controller.sum(0,0,0), 0);
  assert.notEqual(controller.sum(1,2,3), 9);  
});

test('#ignores non-numerical values', function(assert) {
  let controller = this.subject();
  assert.notEqual(controller.sum('yo'), 6);
  assert.equal(controller.sum(0, 'foo', null), 6);
}

twiddle.json

{
  "version": "0.10.6",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": true
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.9.0",
    "ember-data": "2.9.0",
    "ember-template-compiler": "2.9.0",
    "ember-testing": "2.9.0"
  },
  "addons": {}
}