Ember QUnit

[WIP] Unit test helpers for Ember.

About

Ember QUnit uses your application's resolver to find and automatically create test subjects for you with the moduleFor and test helpers.

This is a work in progress but its also quite handy already. Feedback is highly encouraged.

Module Formats

You will find all the popular formats in dist/. If using globals, all methods are found on window.emq.

Examples

Global build setup:

// inject test helpers onto window
emq.globalize();

Setting the resolver

// if you don't have a custom resolver, do it like this:
setResolver(Ember.DefaultResolver.create({namespace: App}));

// otherwise something like:
import Resolver from './path/to/resolver';
import {setResolver} from 'ember-qunit';
setResolver(Resolver.create());

Simple example:

// tell ember qunit what you are testing, it will find it from the
// resolver
moduleForComponent('x-foo', 'XFooComponent');

// run a test
test('it renders', function() {
  expect(2);

  // creates the component instance
  var component = this.subject();
  equal(component.state, 'preRender');

  // render the component on the page
  this.render();
  equal(component.state, 'inDOM');
});

Complex example

// a more complex example taken from ic-tabs
moduleForComponent('ic-tabs', 'TabsComponent', {

  // specify the other units that are required for this test
  needs: [
    'component:ic-tab',
    'component:ic-tab-panel',
    'component:ic-tab-list'
  ]
});

test('selects first tab and shows the panel', function() {
  expect(3);
  var component = this.subject({

    // can provide properties for the subject, like the yielded template
    // of a component (not the layout, in this case)
    template: Ember.Handlebars.compile(''+
      '{{#ic-tab-list}}'+
        '{{#ic-tab id="tab1"}}tab1{{/ic-tab}}'+
        '{{#ic-tab id="tab2"}}tab2{{/ic-tab}}'+
        '{{#ic-tab id="tab3"}}tab3{{/ic-tab}}'+
      '{{/ic-tab-list}}'+
      '{{#ic-tab-panel id="panel1"}}one{{/ic-tab-panel}}'+
      '{{#ic-tab-panel id="panel2"}}two{{/ic-tab-panel}}'+
      '{{#ic-tab-panel id="panel3"}}three{{/ic-tab-panel}}'
    })
  });
  this.render();
  var tab1 = Ember.View.views['tab1'];
  var panel1 = Ember.View.views['panel1'];
  ok(component.get('activeTab') === tab1);
  ok(tab1.get('active'));
  var el = tab1.$();
  ok(panel1.$().is(':visible'));
});

If you are using nested components with templates, you have to list them separately - otherwise your templates won't be loaded:

moduleForComponent('ic-tabs', 'TabsComponent', {

  // specify the other units and templates that are required for this test
  needs: [
    'component:ic-tab',
    'template:components/ic-tab',
    'component:ic-tab-panel',
    'template:components/ic-tab-panel',
    'component:ic-tab-list'
  ]
});
.....

Async Example

Under the hood, if you use Ember.RSVP.Promise, ember-qunit will call QUnit's start and stop helpers to stop the test from tearing down and running other tests while your asynchronous code runs. ember-qunit also asserts that the promise gets fulfilled.

In addition, you can also return promises in the test body:

// If you return a promise from a test callback it becomes an asyncTest. This
// is a key difference between ember-qunit and standard QUnit.
test('async is awesome', function() {
  expect(1);
  var myThing = MyThing.create();
  // myThing.exampleMethod() returns a promise
  return myThing.exampleMethod().then(function() {
    ok(myThing.get('finished'));
  });
});

If an error is thrown in your promise or a promise within test becomes rejected, ember-qunit will fail the test. To assert that a promise should be rejected, you can "catch" the error and assert that you got there:

test('sometimes async gets rejected', function(){
  expect(1);
  var myThing = MyThing.create()
  
  return myThing.exampleMethod().then(function(){
    ok(false, "promise should not be fulfilled");
  })['catch'](function(err){
    equal(err.message, "User not Authorized");
  });
});

Helpers

moduleFor(fullName [, description [, callbacks]])

• fullName: (String) - The full name of the unit, ie controller:application, route:index.

• description: (String) optional - The description of the module

• callbacks: (Object) optional - Normal QUnit callbacks (setup and teardown), with addition to needs, which allows you specify the other units the tests will need.

moduleForComponent(name, [description, callbacks])

• name: (String) - the short name of the component that you'd use in a template, ie x-foo, ic-tabs, etc.

moduleForModel(name, [description, callbacks])

• name: (String) - the short name of the model you'd use in store operations ie user, assignmentGroup, etc.

Contributing

$ npm install
$ bower install
$ npm install -g karma-cli broccoli-cli
$ broccoli serve
# new tab
$ karma start

Building dist/

$ broccoli build dist
# Broccoli will not overwrite dist/, so you
# may need to delete it first