login-test.js

import Ember from "ember";
import { module, test } from 'qunit';
import startApp from '../helpers/start-app';

var App;

module('SignIn failure', {
	beforeEach: function() {
		App = startApp();
		this.xhr                = sinon.useFakeXMLHttpRequest();
		this.server             = sinon.fakeServer.create();
		this.server.autoRespond = true;
		sinon.spy(Ember.$, 'ajax');


		this.server.respondWith('POST', 'http://app.dev/app_test.php/oauth/v2/token', [
			400,
			{ 'Content-Type': 'application/json' },
			'{"error":"invalid_grant","error_description":"Invalid username and password combination"}'
		]);
	},
	afterEach: function() {
		Ember.run(App, App.destroy);
	}
});

test("Error is shown on invalid usernmae/password", function(assert) {
	assert.expect(2);

	visit('/login').then(function() {
		assert.equal(find('.has-error').length, 0, "Error div is shown when shouldn't be");

		fillIn('input.identification', 'foobar');
		fillIn('input.password', 's3cr3t');
  		click('button.submit');

		andThen(function() {
			assert.equal(find('.has-error').length, 1, "Error div is not shown when it should be");
		});
	});
});