[REGRESSION] Route.send is no longer unit testable

[poteto]

Tested on 1.13.3

Unit testing a route's actions via route.send is now broken, as this.router (https://github.com/emberjs/ember.js/blob/v1.13.3/packages/ember-routing/lib/system/route.js#L1082) refers to the service (router.router is undefined) and the else conditional never hits.

Sample test to reproduce:

// app/foo/route.js
import Ember from 'ember';

const set = Ember.set;

export default Ember.Route.extend({
  actions: {
    update(key, value) {
      set(this, key, value);
    }
  }
});

// tests/unit/foo/route-test.js
import Ember from 'ember';
import { moduleFor, test } from 'ember-qunit';

const get = Ember.get;

moduleFor('route:foo', 'Unit | Route | foo');

test('action `foo` does something', function(assert) {
  const expectedResult = 'bar';
  const route = this.subject();

  route.send('update', 'foo', 'bar'); // TypeError: Cannot read property 'trigger' of undefined

  assert.equal(get(route, 'foo'), expectedResult, 'it sets the value');
});

Related – #9820

[rwjblue]

Should be fixed with #11664.