How to setup ember-intl service in Ember integration tests? - ember.js

Question

I have just begun adding ember-intl into an application for which I had working tests. My acceptance tests are still working, but my integration tests on components whose templates are using ember-intl for string translation are failing with:
"No locale defined. Unable to resolve translation:..."
In the ember-intl docs there is a section on Integration Testing, which seems to be out of date:
import hbs from 'htmlbars-inline-precompile';
import wait from 'ember-test-helpers/wait';
import { moduleForComponent, test } from 'ember-qunit';
let service;
moduleForComponent('x-product', 'XProductComponent', {
integration: true,
setup() {
service = this.container.lookup('service:intl');
service.setLocale('en-us');
}
});
test('it renders', function(assert) {
assert.expect(1);
this.render(hbs`{{x-product price=price deadline=deadline}}`);
this.set('price', 1000);
this.set('deadline', new Date());
let output = this.$().text();
assert.ok(output);
});
test('it translates', function(assert) {
assert.expect(1);
/* waits for async behavior (loading translations on app boot) to settle */
return wait().then(() => {
assert.equal(service.t('some.key'), 'Hello world');
});
});
I've looked in the Ember docs and I can see how to stub a service for testing, but not how to just load the service in a test and then work with it.

Answer 1

Instead of using this.container, we now need to use this.owner in the new format tests. Here's a snippet of code showing how to use it in context:
import { module, test } from 'qunit';
import { setupRenderingTest } from 'ember-qunit';
import { find, render } from '#ember/test-helpers';
import hbs from 'htmlbars-inline-precompile';
module('Integration | Component | login-form', function(hooks) {
setupRenderingTest(hooks);
let service;
hooks.beforeEach(function() {
service = this.owner.lookup('service:intl');
service.setLocale('en-us');
});
test('it renders', async function(assert) {
await render(hbs`{{login-form}}`);
assert.equal(find('[data-test-login-title]').textContent.trim(), 'Login');
});
});
A PR has been submitted to ember-intl, so hopefully the docs will reflect the latest best-practice soon.