ember-qunit

What is ember-qunit?

ember-qunit is an Ember.js testing framework that integrates QUnit with Ember.js applications. It provides a set of helpers and utilities to make it easier to write and run tests for Ember.js applications.

What are ember-qunit's main functionalities?

Module Setup

This feature allows you to set up a test module for unit testing. The `setupTest` helper sets up the necessary environment for testing an Ember.js service.

import { module, test } from 'qunit';
import { setupTest } from 'ember-qunit';

module('Unit | Service | my-service', function(hooks) {
  setupTest(hooks);

  test('it exists', function(assert) {
    let service = this.owner.lookup('service:my-service');
    assert.ok(service);
  });
});

Rendering Tests

This feature allows you to write rendering tests for Ember.js components. The `setupRenderingTest` helper sets up the environment for rendering a component and the `render` function is used to render the component in the test.

import { module, test } from 'qunit';
import { setupRenderingTest } from 'ember-qunit';
import { render } from '@ember/test-helpers';
import hbs from 'htmlbars-inline-precompile';

module('Integration | Component | my-component', function(hooks) {
  setupRenderingTest(hooks);

  test('it renders', async function(assert) {
    await render(hbs`<MyComponent />`);
    assert.equal(this.element.textContent.trim(), 'expected text');
  });
});

Application Tests

This feature allows you to write application tests for Ember.js routes. The `setupApplicationTest` helper sets up the environment for testing an entire Ember.js application, and the `visit` function is used to navigate to a specific route in the test.

import { module, test } from 'qunit';
import { setupApplicationTest } from 'ember-qunit';
import { visit, currentURL } from '@ember/test-helpers';

module('Acceptance | my route', function(hooks) {
  setupApplicationTest(hooks);

  test('visiting /my-route', async function(assert) {
    await visit('/my-route');
    assert.equal(currentURL(), '/my-route');
  });
});

Other packages similar to ember-qunit

ember-mocha

ember-mocha is an alternative testing framework for Ember.js that integrates Mocha with Ember.js applications. It provides similar functionality to ember-qunit but uses Mocha as the testing framework instead of QUnit. This can be useful for developers who prefer Mocha's syntax and features.

ember-cli-qunit

ember-cli-qunit is another package that integrates QUnit with Ember.js applications. It provides a similar set of helpers and utilities as ember-qunit but is specifically designed to work with the Ember CLI build system.

ember-test-helpers

ember-test-helpers is a low-level library that provides a set of helpers for testing Ember.js applications. It is used internally by both ember-qunit and ember-mocha and can be used directly for more fine-grained control over test setup and execution.

README

ember-qunit

ember-qunit simplifies testing of Ember applications with QUnit by providing QUnit-specific wrappers around the helpers contained in ember-test-helpers.

Requirements

• Node.js 6 or above
• Ember CLI 2.13 or above

If you need support for Node 4 or older Ember CLI versions please use v3.x of this addon.

Installation

ember-qunit is an Ember CLI addon, so install it as you would any other addon:

$ ember install ember-qunit

Some other addons are detecting the test framework based on the installed addon names and are expecting ember-cli-qunit instead. If you have issues with this then ember install ember-cli-qunit, which should work exactly the same.

Upgrading

For instructions how to upgrade your test suite to the latest testing APIs, please read our Migration Guide.

Usage

The following section describes the use of ember-qunit 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-qunit';

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.owner to interact with Ember's Dependency Injection system
• this.set(), this.setProperties(), this.get(), and this.getProperties()
• this.pauseTest() method to allow easy pausing/resuming of tests

For example, the following is a unit test for the SidebarController:

import { module, test } from 'qunit';
import { setupTest } from 'ember-qunit';

module('SidebarController', function(hooks) {
  setupTest(hooks);

  // Replace this with your real tests.
  test('exists', function() {
    let controller = this.owner.lookup('controller:sidebar');
    assert.ok(controller);
  });
});

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.element to your test context which returns the DOM element representing the wrapper around the elements that were rendered via render()
• sets up the DOM Interaction Helpers from @ember/test-helpers (click(), fillIn(), ...)

import { module, test } from 'qunit';
import { setupRenderingTest } from 'ember-qunit';
import { render } from '@ember/test-helpers';
import hbs from 'htmlbars-inline-precompile';

module('GravatarImageComponent', function(hooks) {
  setupRenderingTest(hooks);

  test('renders', async function() {
    await render(hbs`{{gravatar-image}}`);
    assert.ok(this.element.querySelector('img'));
  });
});

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 { module, test } from 'qunit';
import { setupApplicationTest } from 'ember-qunit';
import { visit, currentURL } from '@ember/test-helpers';

module('basic acceptance test', function(hooks) {
  setupApplicationTest(hooks);

  test('can visit /', async function(assert) {
    await visit('/');
    assert.equal(currentURL(), '/');
  });
});

Contributing

Installation

• git clone <repository-url>
• cd ember-qunit
• npm install

Running tests

• npm test (Runs ember try:each to test your addon against multiple Ember versions)
• ember test
• ember test --server

Running the dummy application

• ember serve
• Visit the dummy application at http://localhost:4200.

For more information on using ember-cli, visit https://ember-cli.com/.