New Twiddle

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember.get() vs this.get() vs object.property',
  emObj: null,
  pojo: {
  	y: {
  		m: 'pojo'
		}
  },
  init() {
    this._super(...arguments);
		this.set('emObj', Ember.Object.create({ 
      y: { 
        m: 'eobj' 
      },
      unknownProperty: function(key) {
        if (key === 'emberGet') return 'ember get';
      }
    }));
  },

  // Accessing properties of pojo
  pojoGetComputed: Ember.computed(function () {
    return this.get('pojo.y.m') + " -> getting props via this.get()";
  }),
  
  // Accessing raw properties of pojo
  pojoRawComputed: Ember.computed(function () {
    const pojo = this.get('pojo');
    return pojo.y.m + " -> getting raw props";
  }),
  
  // Accessing properties with Ember.get()
  pojoEmberGetComputed: Ember.computed(function () {
    const pojo = this.get('pojo');
    return Ember.get(pojo, 'y.m') + " -> getting props with Ember.get()";
  }),
  
  // Accessing unknown property with Ember.get()
  emberGetComputed: Ember.computed(function () {
    const emObj = this.get('emObj');
    return Ember.get(emObj, 'emberGet') + " -> getting props with Ember.get()";
  }),
  
  // FAILURE - MAKES ENTIRE TEMPLATE CRASH
  // Error: TypeError: pojo.get is not a function
  // Accessing unknown property with obj.get()
  /*
  pojoEmberGetUnknownComputed: Ember.computed(function () {
    const pojo = this.get('pojo');
    return pojo.get('emberGet') + " -> getting props with Ember.get()";
  })
  */
});

templates.application.hbs

<h1>{{appName}}</h1>
<div class="pojo-computed">{{pojoGetComputed}}</div>
<div class="pojo-raw-computed">{{pojoRawComputed}}</div>
<div class="pojo-ember-get-computed">{{pojoEmberGetComputed}}</div>
<div class="ember-get-computed">{{emberGetComputed}}</div>
<div class="pojo-computed-ember">{{pojoEmberGetUnknownComputed}}</div>
{{outlet}}

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.test-helper.js

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

setResolver(resolver);

twiddle.json

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