Testing: The Modern Way

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1 Testing: The Modern Way

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2 Open Source Addict Ember Core Team OUR MISSION Investment generally results in acquiring

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3 Thank You!!

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5 History...

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Testing: The Future... Today?

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State of Testing Today ● Acceptance ● Integration ● Unit

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Acceptance moduleForAcceptance('Acceptance | login'); test('visiting /login', function(assert) { visit('/login'); andThen(function() { assert.equal(currentURL(), '/login'); }); });

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Integration moduleForComponent('pretty-color', { integration: true }); test('button click', function(assert) { this.render(hbs`{{magic-title}}`); this.$('button').click(); assert.equal(this.$().text(), 'This is Magic'); });

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Unit moduleFor('route:application'); test('perform the right query', function(assert) { let route = this.subject(); let result = route._queryString(); assert.equal(result, '?awesome=sauce'); });

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Great, :shipit:

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The End

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Seriously?

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● Built for a globals world. ● “magic” `andThen` ● No ability to stub/mock services. Acceptance Test Issues

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● Completely ignorant about async ● Manual triggering of user interaction ● Much less “tailored” API Unit/Integration Test Issues

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Now what?

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emberjs/rfcs#119

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● Use `async` / `await` ● Consistent interface ● Extendability ● Backwards Compatibility Grand Testing Unification

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25 moduleForAcceptance('Acceptance | login'); test('visiting /login', function(assert) { visit('/login'); andThen(function() { assert.equal(currentURL(), '/login'); }); }); History - Acceptance

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26 History - Integration moduleForComponent('pretty-color', { integration: true }); test('button click', function(assert) { this.render(hbs`{{magic-title}}`); this.$('button').click(); assert.equal(this.$().text(), 'This is Magic'); });

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27 History - Unit moduleFor('route:application'); test('perform the right query', function(assert) { let route = this.subject(); let result = route._queryString(); assert.equal(result, '?awesome=sauce'); });

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28 History - Acceptance Issues “magical” Globals API No owner access

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29 History - Unit/Integration Issues Manual User Interaction Ignores Async Poorer design

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30 Today...

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32 import { setupApplicationTest } from 'ember-qunit'; import { module } from 'qunit'; module('Acceptance | login', function(hooks) { setupApplicationTest(hooks); test('visiting /login', async function(assert) { await visit('/login'); assert.equal(currentURL(), '/login'); }); }); Today - Application

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33 Today - Rendering import { module } from 'qunit'; import { setupRenderingTest } from 'ember-qunit'; import { render, click } from '@ember/test-helpers'; module('pretty-color', function(hooks) { setupRenderingTest(hooks); test('button click', async function(assert) { await render(hbs`{{magic-title}}`); await click('button'); assert.dom().hasText('This is magic'); }); });

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34 Today - Basic import { module } from 'qunit'; import { setupTest } from 'ember-qunit'; module('route:application', function(hooks) { setupTest(hooks); test('perform the right query', function(assert) { let route = this.owner.lookup('route:application'); let result = route._queryString(); assert.equal(result, '?awesome=sauce'); }); });

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35 Today - Addons import setupMirageTest from 'ember-cli-mirage/test-support/setup-mirage'; // ...snip... module('Integration | Component | light table', function(hooks) { setupRenderingTest(hooks); setupMirageTest(hooks); // <-- test('button click', async function(assert) { await render(hbs`{{magic-title}}`); await click('button'); assert.dom().hasText('This is magic'); }); });

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36 Today - Addons import { selectChoose } from 'ember-power-select/test-support'; // ...snip... module('Integration | Component x-foo', function(hooks) { setupRenderingTest(hooks); test('button click', async function(assert) { await render(hbs`{{x-foo}}`); await selectChoose('.selector', 'Barbaz'); assert.dom().hasText('This is magic'); }); });

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37 Today - Addons import { setupPact, given, interaction } from 'ember-cli-pact'; // ...snip… module('Pact | People', function(hooks) { setupTest(hooks); setupPact(hooks, { provider: 'my-api', consumer: 'my-app'}); test('locating a person by ID', async function(assert) { given('a person exists', { id: '123', name: 'Alice' }); let person = await interaction(() => this.store().findRecord('person', '123')); assert.equal(person.get('id'), '123'); assert.equal(person.get('name'), 'Alice'); }); });

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38 Today - Summary Discoverability Consistent APIs Modularity

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39 Future

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40 Future Addon Entry Points Engine & FastBoot Specific APIs Common Entry Module

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41 Q/A

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42 `window.find` is a troll!

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44 Lots of tests === Slow!

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45 for (let i = 0; i < 1000; i++) { module('Acceptance | index | ' + i, function(hooks) { setupApplicationTest(hooks); test('visiting /', async function(assert) { await visit('/'); await click('button'); assert.dom('.other-landing').hasText('Landed on other...'); }); }); }

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46 Ember 3.1

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47 Ember 3.2

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48 Ember 3.2 + emberjs/ember-test-helpers#370

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50 Runloop

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53 Testing intermediate states?

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54 test('shows and hides loading spinner after submit', async function(assert) { await visit('/'); click('.submit'); // <-- don't await await waitFor('.loading-spinner'); assert.dom('.loading-spinner').exists(); await settled(); assert.dom('.loading-spinner').doesNotExist(); });

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55 Engine tests?

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56 import Resolver from 'my-app/resolver'; import engineResolverFor from 'ember-engines/test-support/engine-resolver-for'; let engineResolver = engineResolverFor('the-async-engine'); const resolver = Resolver.extend({ resolve() { let resolved = this._super(...arguments); if (resolved) { return resolved; } return engineResolver.resolve(...arguments); }, }).create();

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57 Fastboot tests?

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59 Passing models into components?

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60 test('rendering a blog post', async function(assert) { const post = this.server.create('post', 'inSomeState'); await Ember.run(async function() { // Must be inside a Run Loop to use the store, abstraction feels really leaky this.set('post', this.store.find('post', post.id); }); await render(hbs` {{blog-post post=post}} `); // Perform some assertion, finally });