emberjs
ember-mocha
ember-mocha simplifies testing of Ember applications with Mocha by providing Mocha-specific wrappers around the helpers contained in @ember/test-helpers.
Upgrading from an earlier version? Have a look at our Migration Guide.
Compatibility
- Ember.js v3.4 or above
- Ember CLI v2.13 or above
- Node.js 8 or above
Installation
ember-mocha is an Ember CLI addon, so install it
as you would any other addon:
$ ember install ember-mochaSome other addons are detecting the test framework based on the installed
addon names and are expecting ember-cli-mocha instead. If you have issues
with this then ember install ember-cli-mocha, which should work exactly
the same.
Usage
The following section describes the use of Ember Mocha with the latest modern Ember testing APIs, as laid out in the RFCs 232 and 268.
For the older APIs have a look at our Legacy Guide.
Setting the Application
Your tests/test-helper.js file should look similar to the following, to
correctly setup the application required by @ember/test-helpers:
import Application from '../app';
import config from '../config/environment';
import { setApplication } from '@ember/test-helpers';
import { start } from 'ember-mocha';
setApplication(Application.create(config.APP));
start();Also make sure that you have set ENV.APP.autoboot = false; for the test
environment in your config/environment.js.
Setup Tests
The setupTest() function can be used to setup a unit test for any kind
of "module/unit" of your application that can be looked up in a container.
It will setup your test context with:
this.ownerto interact with Ember's Dependency Injection systemthis.set(),this.setProperties(),this.get(), andthis.getProperties()this.pauseTest()method to allow easy pausing/resuming of tests
For example, the following is a unit test for the SidebarController:
import { expect } from 'chai';
import { describe, it } from 'mocha';
import { setupTest } from 'ember-mocha';
describe('SidebarController', function() {
setupTest();
// Replace this with your real tests.
it('exists', function() {
let controller = this.owner.lookup('controller:sidebar');
expect(controller).to.be.ok;
});
});If you find that test helpers from other addons want you to pass a hooks
object you can do so like this:
let hooks = setupTest();
setupMirage(hooks);This will make sure that in functions passed to hooks.afterEach() the
this.owner and other things that setupTest() sets up are still available.
Mocha itself runs afterEach hooks in a different order than QUnit, which is
why this "workaround" is sometimes needed.
Setup Rendering Tests
The setupRenderingTest() function is specifically designed for tests that
render arbitrary templates, including components and helpers.
It will setup your test context the same way as setupTest(), and additionally:
- Initializes Ember's renderer to be used with the
Rendering helpers,
specifically
render() - Adds
this.elementto your test context which returns the DOM element representing the wrapper around the elements that were rendered viarender() - sets up the DOM Interaction Helpers
from
@ember/test-helpers(click(),fillIn(), ...)
import { expect } from 'chai';
import { describe, it } from 'mocha';
import { setupRenderingTest } from 'ember-mocha';
import { render } from '@ember/test-helpers';
import hbs from 'htmlbars-inline-precompile';
describe('GravatarImageComponent', function() {
setupRenderingTest();
it('renders', async function() {
await render(hbs`{{gravatar-image}}`);
expect(this.element.querySelector('img')).to.exist;
});
});Setup Application Tests
The setupApplicationTest() function can be used to run tests that interact
with the whole application, so in most cases acceptance tests.
On top of setupTest() it will:
- Boot your application instance
- Set up all the DOM Interaction Helpers
(
click(),fillIn(), ...) as well as the Routing Helpers (visit(),currentURL(), ...) from@ember/test-helpers
import { expect } from 'chai';
import { describe, it } from 'mocha';
import { setupApplicationTest } from 'ember-mocha';
import { visit, currentURL } from '@ember/test-helpers';
describe('basic acceptance test', function() {
setupApplicationTest();
it('can visit /', async function() {
await visit('/');
expect(currentURL()).to.equal('/');
});
});Upgrading
For instructions how to upgrade your test suite please read our Migration Guide.
Contributing
Contributions are welcome. Please follow the instructions below to install and test this library.
Installation
npm installTesting
In order to test in the browser:
npm start... and then visit http://localhost:4200/tests.
In order to perform a CI test:
npm testCopyright and License
Copyright 2014 Switchfly
This product includes software developed at Switchfly (http://www.switchfly.com).
NOTICE: Only our own original work is licensed under the terms of the Apache License Version 2.0. The licenses of some libraries might impose different redistribution or general licensing terms than those stated in the Apache License. Users and redistributors are hereby requested to verify these conditions and agree upon them.