Sven<p>Unit testing a game, is it even possible? 🕹️🟢 Let's try with <a href="https://toot.berlin/tags/WebTestRunner" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>WebTestRunner</span></a>, live now on <a href="https://www.twitch.tv/noyainrain" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">twitch.tv/noyainrain</span><span class="invisible"></span></a> 😊 <a href="https://toot.berlin/tags/TypeScript" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>TypeScript</span></a> <a href="https://toot.berlin/tags/JavaScript" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>JavaScript</span></a> <a href="https://toot.berlin/tags/Phaser" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Phaser</span></a> <a href="https://toot.berlin/tags/OpenSource" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>OpenSource</span></a> <a href="https://toot.berlin/tags/IndieDev" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>IndieDev</span></a></p>
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#webtestrunner
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Doug Parker 🕸️<p>Turns out, not a <a href="https://techhub.social/tags/Chrome" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Chrome</span></a> bug instead a <a href="https://techhub.social/tags/WebTestRunner" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>WebTestRunner</span></a> / <a href="https://techhub.social/tags/Puppeteer" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Puppeteer</span></a> bug. Apparently concurrent tests run multiple tabs in the same window by default. This means only one page is visible and pages in the background don't update consistently, meaning `requestAnimationFrame` just doesn't get called sometimes.</p><p><a href="https://github.com/modernweb-dev/web/issues/2588" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">github.com/modernweb-dev/web/i</span><span class="invisible">ssues/2588</span></a></p><p>This is fixable by giving each test its own window, so every test is always visible.</p><p>Definitely not an obvious workaround though, so hopefully this is something which can be fixed by default.</p>
Doug Parker 🕸️<p>Pretty convinced I've got a Chrome bug on my hands here at this point.</p><p>Took all night, but I was able to narrow down the test cases to two files <15 lines each failing on latest <a href="https://techhub.social/tags/WebTestRunner" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>WebTestRunner</span></a> and <a href="https://techhub.social/tags/Puppeteer" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Puppeteer</span></a>.</p><p>Last step is to strip <a href="https://techhub.social/tags/Jasmine" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Jasmine</span></a> from this and see if I can reproduce similar behavior with `setTimeout`, then file the bug.</p>
Doug Parker 🕸️<p>I've tried to get a minimal reproduction but this _literally_ takes at least 6 tests across 2 different files to replicate. Disabling any _one_ test fixes all of them. No shared state between them which I can find. The two files *should* be completely isolated from each other anyways (using <a href="https://techhub.social/tags/WebTestRunner" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>WebTestRunner</span></a>).</p><p>I'm completely baffled here.</p>
Doug Parker 🕸️<p><span class="h-card" translate="no"><a href="https://mastodon.social/@westbrook" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>westbrook</span></a></span> I *think* I got all the options. I don't see anything else in your example which looks related.</p><p><a href="https://github.com/dgp1130/composite-weak-map/commit/49c09375ec9550e9a0328b0ef8250783f2407c40#diff-24d782e02f46a1eb18aed719d1c73354c23a5702d6e324a6163f6d90a6965cad" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">github.com/dgp1130/composite-w</span><span class="invisible">eak-map/commit/49c09375ec9550e9a0328b0ef8250783f2407c40#diff-24d782e02f46a1eb18aed719d1c73354c23a5702d6e324a6163f6d90a6965cad</span></a></p><p>Even outside <a href="https://techhub.social/tags/WebTestRunner" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>WebTestRunner</span></a> I can't get it to work. Just running the <a href="https://techhub.social/tags/Chrome" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Chrome</span></a> binary directly with those flags doesn't work either. There must be some other condition for `window.gc` I'm not finding...</p>
Doug Parker 🕸️<p><span class="h-card" translate="no"><a href="https://mastodon.social/@westbrook" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>westbrook</span></a></span> Ooh, that's very cool. I was not aware of that API.</p><p>I'm trying to copy what you did there and was able to spawn <a href="https://techhub.social/tags/WebTestRunner" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>WebTestRunner</span></a> with `measureUserAgentSpecificMemory`, but for the life of me can't get `window.gc` to be defined. I'm setting the `--expose-gc` flag just like you seem to, but I can't get Chrome to start with it. Is there some other special incantation I need to do this?</p><p><a href="https://github.com/adobe/spectrum-web-components/blob/e5a1a61bae448005abab9e6aa1a4be5c3efa3372/web-test-runner.utils.js#L37" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">github.com/adobe/spectrum-web-</span><span class="invisible">components/blob/e5a1a61bae448005abab9e6aa1a4be5c3efa3372/web-test-runner.utils.js#L37</span></a></p>
Doug Parker 🕸️<p><span class="h-card" translate="no"><a href="https://mastodon.social/@VamptVo" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>VamptVo</span></a></span> Sounds like you're looking for <a href="https://techhub.social/tags/WebTestRunner" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>WebTestRunner</span></a>?</p><p><a href="https://modern-web.dev/docs/test-runner/overview/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">modern-web.dev/docs/test-runne</span><span class="invisible">r/overview/</span></a></p><p><a href="https://techhub.social/tags/ModernWeb" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ModernWeb</span></a></p>
westbrook<p>Building on this area...</p><p>Testing is like a magic power, but lean into magic realism over magic fantasy for better results: <a href="https://dev.to/westbrook/testing-with-js-is-like-magic-but-is-it-science-23f8" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">dev.to/westbrook/testing-with-</span><span class="invisible">js-is-like-magic-but-is-it-science-23f8</span></a></p><p>Now to get to work on the next installation!</p><p><a href="https://mastodon.social/tags/webComponents" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>webComponents</span></a> <a href="https://mastodon.social/tags/webTestRunner" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>webTestRunner</span></a> <a href="https://mastodon.social/tags/testing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>testing</span></a></p>
Doug Parker 🕸️<p><a href="https://techhub.social/tags/Angular" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Angular</span></a> announcement: We're moving Angular to <a href="https://techhub.social/tags/Jest" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Jest</span></a> and <a href="https://techhub.social/tags/WebTestRunner" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>WebTestRunner</span></a>.</p><p>We've seen a lot of movement in the web testing ecosystem towards Jest and want to make it more available for <a href="https://techhub.social/tags/AngularCLI" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AngularCLI</span></a> users.</p><p>We've also been particular impressed with Web Test Runner and are looking forward to bringing it into the Angular ecosystem as well.</p><p>Check out the <a href="https://techhub.social/tags/AngularBlog" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>AngularBlog</span></a> for all the details:</p><p><a href="https://medium.com/angular-blog/moving-angular-cli-to-jest-and-web-test-runner-ef85ef69ceca" rel="nofollow noopener" target="_blank"><span class="invisible">https://</span><span class="ellipsis">medium.com/angular-blog/moving</span><span class="invisible">-angular-cli-to-jest-and-web-test-runner-ef85ef69ceca</span></a></p>
westbrook<p>So, if you're into <a href="https://mastodon.social/tags/webComponents" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>webComponents</span></a>...</p><p>And, more importantly <a href="https://mastodon.social/tags/testing" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>testing</span></a> them...</p><p>And, most importantly doing it with <a href="https://mastodon.social/tags/webTestRunner" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>webTestRunner</span></a>... </p><p>Then you might be into the new post I wrote: <a href="https://dev.to/westbrook/testing-web-components-with-webtest-runner-51g6" rel="nofollow noopener" target="_blank"><span class="invisible">https://</span><span class="ellipsis">dev.to/westbrook/testing-web-c</span><span class="invisible">omponents-with-webtest-runner-51g6</span></a></p><p>Looking to make this part of series where I touch on a whole bunch of extended techniques and practices that I've found useful in this area, so share your thoughts in the comments or in response this toot.</p><p>Learn more about @web/test-runner here: <a href="https://modern-web.dev/docs/test-runner/overview/" rel="nofollow noopener" target="_blank"><span class="invisible">https://</span><span class="ellipsis">modern-web.dev/docs/test-runne</span><span class="invisible">r/overview/</span></a></p>
Sasha Firsov<p>@web/test-runner and StoryBook are great tools to work with in front-end. Till now the another handy tool was not available in this stack - MSW mocking. </p><p>It took a bit of trickery to baptize MSW into es6 modules. If you want to use MSW for <a href="https://fosstodon.org/tags/webcomponents" class="mention hashtag" rel="tag">#<span>webcomponents</span></a> testing, take a look</p><p><a href="https://fosstodon.org/tags/modernweb" class="mention hashtag" rel="tag">#<span>modernweb</span></a> <a href="https://fosstodon.org/tags/webtestrunner" class="mention hashtag" rel="tag">#<span>webtestrunner</span></a> <a href="https://fosstodon.org/tags/msw" class="mention hashtag" rel="tag">#<span>msw</span></a> </p><p><a href="https://blog.firsov.net/2023/03/how-to-integrate-msw-queries-mocking.html" target="_blank" rel="nofollow noopener" translate="no"><span class="invisible">https://</span><span class="ellipsis">blog.firsov.net/2023/03/how-to</span><span class="invisible">-integrate-msw-queries-mocking.html</span></a></p>
Doug Parker 🕸️<p>So I've been doing a bit of research into <a href="https://techhub.social/tags/web" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>web</span></a> <a href="https://techhub.social/tags/UnitTesting" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>UnitTesting</span></a> <a href="https://techhub.social/tags/tooling" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>tooling</span></a> (<a href="https://techhub.social/tags/Jest" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Jest</span></a>, <a href="https://techhub.social/tags/Vitest" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Vitest</span></a>, <a href="https://techhub.social/tags/Jasmine" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Jasmine</span></a>, <a href="https://techhub.social/tags/Karma" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Karma</span></a>, <a href="https://techhub.social/tags/WebTestRunner" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>WebTestRunner</span></a>, ...).</p><p>I'm curious if there's any interest in a blog post on some of my takeaways about aspects like:</p><p>* Test runners vs test frameworks.<br>* Browser-based runners vs Node-based runners.<br>* Changes in the ecosystem.<br>* Future directions of JS unit testing.<br>* ...</p>
Doug Parker 🕸️<p><span class="h-card"><a href="https://hachyderm.io/@eliajf" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>eliajf</span></a></span> I was mostly looking into test runners moreso than test frameworks.</p><p><a href="https://techhub.social/tags/Jest" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Jest</span></a> is still dominant by a huge amount, but <a href="https://techhub.social/tags/WebTestRunner" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>WebTestRunner</span></a> and <a href="https://techhub.social/tags/JasmineBrowserRunner" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>JasmineBrowserRunner</span></a> looked interesting to me. I've had good experiences with WTR in the past, but haven't tried Jasmine's browser runner.</p><p><a href="https://modern-web.dev/docs/test-runner/overview/" rel="nofollow noopener" target="_blank"><span class="invisible">https://</span><span class="ellipsis">modern-web.dev/docs/test-runne</span><span class="invisible">r/overview/</span></a><br><a href="https://www.npmjs.com/package/jasmine-browser-runner" rel="nofollow noopener" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">npmjs.com/package/jasmine-brow</span><span class="invisible">ser-runner</span></a></p>
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