@each test

controllers.application.js

import Ember from 'ember';

const elFn = el => el.a + ', ' + el.b;

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  list: [{a: 1, b: 0}, {a: 2, b:6}],
  
  dummyComputed: Ember.computed('list', function() {
    return this.get('list').map(elFn);
  }),
  
  dummyComputedArr: Ember.computed('list.[]', function() {
    return this.get('list').map(elFn);
  }),
  
  dummyComputedEach: Ember.computed('list.@each', function() {
    return this.get('list').map(elFn);
  }),
  
  listStandard: Ember.computed.map('list', elFn), 
  listArray: Ember.computed.map('list.[]', elFn),
  listEach: Ember.computed.map('list.@each', elFn),
  listEachAs: Ember.computed.map('list.@each.a', elFn),
  listEachBs: Ember.computed.map('list.@each.b', elFn),
  listEachBoth: Ember.computed.map('list.@each.{a,b}', elFn),
  
  theAs: Ember.computed.map('list.@each.b', function(el) {
    return el.b;
  }),
  
  actions: {
    changeA() {
      Ember.set(this, 'list.firstObject.a', Ember.get(this, 'list.firstObject.a') + 1);
    },
    changeB() {
      Ember.set(this, 'list.firstObject.b', Ember.get(this, 'list.firstObject.b') + 1);
    },
    add() {
      this.list.pushObject({a: 3, b: 10});
    }
  }
});

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}

.l {
  float: left;
  width: 200px;
  height: 100px;
  margin: 1em;
}

.after-box {
  clear: left;
}

templates.application.hbs

<div class="l">
List
<ul>
{{#each list as |x|}}
<li>a: {{x.a}}, b: {{x.b}}</li>
{{/each}}
</ul>
</div>

<div class="l">
computed('list')
<ul>
{{#each dummyComputed as |x|}}
<li>{{x}}</li>
{{/each}}
</ul>
</div>

<div class="l">
map('list.[]')
<ul>
{{#each dummyComputedArr as |x|}}
<li>{{x}}</li>
{{/each}}
</ul>
</div>

<div class="l">
computed('list.@each')
<ul>
{{#each dummyComputedEach as |x|}}
<li>{{x}}</li>
{{/each}}
</ul>
</div>

<div class="after-box">
</div>

<div class="l">
List
<ul>
{{#each list as |x|}}
<li>a: {{x.a}}, b: {{x.b}}</li>
{{/each}}
</ul>
</div>

<div class="l">
map('list')
<ul>
{{#each listStandard as |x|}}
<li>{{x}}</li>
{{/each}}
</ul>
</div>

<div class="l">
map('list.[]')
<ul>
{{#each listArray as |x|}}
<li>{{x}}</li>
{{/each}}
</ul>
</div>


<div class="l">
map('list.@each')
<ul>
{{#each listEach as |x|}}
<li>{{x}}</li>
{{/each}}
</ul>
</div>

<div class="l">
map('list.@each.a')
<ul>
{{#each listEachAs as |x|}}
<li>{{x}}</li>
{{/each}}
</ul>
</div>

<div class="l">
map('list.@each.b')
<ul>
{{#each listEachBs as |x|}}
<li>{{x}}</li>
{{/each}}
</ul>
</div>

<div class="l">
map('list.@each.{a,b}')
<ul>
{{#each listEachBoth as |x|}}
<li>{{x}}</li>
{{/each}}
</ul>
</div>

<div class="after-box">

<button onclick={{action "add"}}>add</button>
<button onclick={{action "changeA"}}>changeA</button>
<button onclick={{action "changeB"}}>changeB</button>

</div>

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": "0.12.1",
  "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"
  }
}