Test stub for component -> helper -> service

components.spotify-song.js

import Ember from 'ember';

export default Ember.Component.extend({
});

controllers.application.js

import Ember from 'ember';

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

helpers.has-spotify.js

import Ember from 'ember';

export function hasSpotify() {
  return this.get('spotifyService.spotifyInfo') !== undefined;
}

export default Ember.Helper.extend({
  spotifyService: Ember.inject.service(),
  compute: hasSpotify
});

services.spotify-service.js

import Ember from 'ember';

export default Ember.Service.extend({
  spotifyInfo: { username: 'alisdair' }
});

templates.application.hbs

{{spotify-song}}

templates.components.spotify-song.hbs

{{#if (has-spotify)}}
  Song info
{{else}}
  Log in
{{/if}}

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.integration.components.spotify-song-test.js

import Ember from 'ember';
import { moduleForComponent, test } from 'ember-qunit';
import hbs from 'htmlbars-inline-precompile';

const { getOwner } = Ember;

moduleForComponent('spotify-song', 'Integration | Component | spotify song', {
  integration: true
});

test('normal usage', function(assert) {
  this.render(hbs`{{spotify-song}}`);

  assert.equal(this.$().text().trim(), 'Song info', 'shows song info');
});

test('when spotify service fails', function(assert) {
  let spotifyService = Ember.Service.extend({
    spotifyInfo: undefined
  });
  let owner = getOwner(this);

  owner.register('service:spotify-service', spotifyService);

  this.render(hbs`{{spotify-song}}`);

  assert.equal(this.$().text().trim(), 'Log in', 'asks for log in');
});

tests.test-helper.js

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

setResolver(resolver);

twiddle.json

{
  "version": "0.7.2",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": true
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.4.4/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.4.3/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.4.4/ember-template-compiler.js"
  }
}