injecting DS.Store into a helper

controllers.application.js

import Ember from 'ember';

const { inject } = Ember;

export default Ember.Controller.extend({
  store: inject.service()
});

helpers.terrible-helper.js

import Ember from 'ember';

const { isPresent } = Ember;

export function terribleHelper([store]) {
  return isPresent(store.findRecord) ? "Why would you ever do this" : "This is fine";
}

export default Ember.Helper.helper(terribleHelper);

templates.application.hbs

{{terrible-helper store}}

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"
  }
}