#vitest — Public Fediverse posts

@vitest killed Jest

As per the [first graph], we can see :

* the number of downloads of Jest are stable
* the number of downloads of Vitest is increasing fastly

The [second graph] shows the relative decline of Jest compared to Vitest

[first graph]: https://tanstack.com/stats/npm?packageGroups=%5B%7B%22packages%22%3A%5B%7B%22name%22%3A%22jest%22%7D%5D%2C%22color%22%3A%22%23C21325%22%7D%2C%7B%22packages%22%3A%5B%7B%22name%22%3A%22vitest%22%7D%5D%2C%22color%22%3A%22%23646CFF%22%7D%5D&range=1825-days&transform=none&binType=weekly&viewMode=history&chartType=line&barSort=value&bucketOffset=0&playbackIntervalMs=350&playbackLoop=false&playbackPlaying=false&showDataMode=all&normalizeBaseline=true&showBaseline=false&showLegend=false&height=400&barOrientation=vertical

[second graph]: https://tanstack.com/stats/npm?packageGroups=%5B%7B%22packages%22%3A%5B%7B%22name%22%3A%22jest%22%7D%5D%2C%22color%22%3A%22%23C21325%22%7D%2C%7B%22packages%22%3A%5B%7B%22name%22%3A%22vitest%22%7D%5D%2C%22color%22%3A%22%23646CFF%22%7D%5D&range=1825-days&transform=none&binType=weekly&viewMode=history&chartType=stacked-area&barSort=value&bucketOffset=0&playbackIntervalMs=350&playbackLoop=false&playbackPlaying=false&showDataMode=all&normalizeBaseline=true&showBaseline=false&showLegend=false&height=400&barOrientation=vertical

#JS #JavaScript #TS #TypeScript
#Jest #Vitest
#NPM #Node
#TanStack #Stats #Stat #Chart
#Test #Testing #UnitTest #UnitTests #UnitTesting
#Dev #Code

Testing React Server Components: Vitest Patterns for Async Boundaries and Mock Strategies, by (not on Mastodon or Bluesky):

https://www.sitepoint.com/testing-react-server-components-vitest-async-boundaries-mock/?ref=frontenddogma.com

#react #components #testing #vitest

Announcing Vite Beta, by @manniL and others (@voidzero.dev):

https://voidzero.dev/posts/announcing-vite-plus-beta?ref=frontenddogma.com

#releasenotes #vite #vitest #rolldown #oxc #voidzero

🚨BREAKING: Yet another groundbreaking revelation! 🙄 Learn the "basics" of #testing with Jest/Vitest in a browser-based course that promises to teach you the same old stuff you've seen a thousand times—now with added async confusion! 🎉 Who knew free could come with a side of boredom? 💤
https://howtotestfrontend.com/courses/jest-vitest-fundamentals #HackerNews #Jest #Vitest #AsyncCourses #Boredom #HackerNews #ngated

Jest/Vitest interactive course (runs in the browser)

https://howtotestfrontend.com/courses/jest-vitest-fundamentals

#HackerNews #Jest #Vitest #interactive #course #browser #testing #frontend #development

Gestern zwei Vorträge zu #React auf der #EnterJS in lauschiger Location. Codes und Slides findet ihr hier:

- Fullstack-Anwendungen mit React und TanStack: https://nilshartmann.net/t/getting-started-fullstack-anwendungen-mit-react-und-tan-stack-enter-js

- #Vitest Browser Mode im Praxis-Check: https://nilshartmann.net/t/realistische-komponenten-tests-ohne-schmerzen-vitest-browser-mode-im-praxis-check-enter-js

https://blog.gslin.org/archives/2026/06/07/13061/voidzero-%e5%8a%a0%e5%85%a5-cloudflare/

VoidZero 加入 Cloudflare

#ai #bubble #cloudflare #ecosystem #javascript #js #vite #vitest #voidzero

Cloudflare now controls a huge piece of the open source web

https://fed.brid.gy/r/https://nerds.xyz/2026/06/cloudflare-buys-vite-creator-voidzero/

Vitest 4 Browser Mode: Component Testing Without Playwright, by (not on Mastodon or Bluesky):

https://www.sitepoint.com/vitest-4-browser-mode-component-testing-without-playwright/?ref=frontenddogma.com

#vitest #testing #components #headless #browsers

[Proposal for] Framework-Agnostic Vitest, by @erus.dev:

https://github.com/vitest-dev/vitest/discussions/10271

#discussions #vitest #vite

I wanna dive deeper into the topic of #QualityAssurance and was wondering if someone can recommend learning resources?

Thanks to my work as #frontend engineer I’m familiar with the basics, know how to work with #playwright and #vitest, know the difference between unit, integration and end-to-end test, etc.

I’m specifically curious about the planning aspect, with a focus on #accessibility 🤗

#qa #a11y #frontend #WebDev #DevOps

[Перевод] 37 советов и приемов по написанию качественных тестов для фронтенда

Мне нравится писать тесты. Написание теста и последующее обновление кода для его прохождения — всегда увлекательный процесс. Но нет ничего хуже, чем выяснение того, что проверяют существующие тесты (раньше я сам часто был автором таких тестов). Представляю вашему вниманию мои советы по написанию высококачественных тестов для фронтенда.

https://habr.com/ru/companies/timeweb/articles/1006680/

#javascript #js #testing #test #jest #vitest #timeweb_статьи_перевод #тестирование #тест #tdd

I've started prototyping a playwright-like test framework for integration testing CLIs and TUIs https://github.com/myobie/pty/blob/main/docs/testing.md #node #pty #tui #xterm #vitest

I took a project that was already on the most recent versions of Vite and Vitest and upgraded it to Vite 8/Vitest 4.1 today. It all just worked on the first try. There were a couple of Vite-related plugins in the project and none of them needed updating.

Great work, Vite folks!

#vite #vitest

https://vitest.dev/guide/browser/#configuration - #vitest browser mode uses #Playwright and others to run #tests in a real browser.

Vitest vs. Jest 2026: The Migration Guide With Real Benchmarks, by (not on Mastodon or Bluesky):

https://www.sitepoint.com/vitest-vs-jest-2026-migration-benchmark/

#guides #migrating #vitest #jest #comparisons

What’s New in ViteLand: January 2026 Recap, by @manniL (@voidzero.dev):

https://voidzero.dev/posts/whats-new-jan-2026

#releasenotes #vite #vitest #rolldown #oxc

Git-хуки, которые не дают коммитить плохой код

Здравствуйте, коллеги программисты! Большинство фейлов в CI — это мелочи: забытый console.log , форматирование, линт, сломанный импорт, файл без теста. Такие ошибки не должны доезжать до сборки или код-ревью. Git-хуки позволяют запускать проверки прямо во время git commit и блокировать коммит, если были обнаружены нарушения. В прошлой статье я рассказывал про скрипты, которые я использую для проверки качества кода в PHP/Laravel. В этой статье я хочу рассказать о скриптах для JavaScript/TypeScript и Python — линтинг, форматирование, тесты, статический анализ и проверка наличия тестов. Все скрипты описанные в статье находятся здесь - https://github.com/prog-time/git-hooks

https://habr.com/ru/articles/993870/

#линтер #git_hooks #javascript #python #eslint #prettier #tsc #vitest #mypy #pytest

🤔 The article promises EVERYTHING about `act()` in React tests, but delivers a haphazard buffet of disjointed topics, leaving you more confused than a cat in a bath 🛁. It's like going to a pizza place and getting served a salad, a smoothie, and a lecture on #Vitest. Bon appétit! 🍕💥
https://howtotestfrontend.com/resources/react-act-function-everything-you-need-to-know #ReactTesting #DisjointedTopics #ConfusedDev #PizzaAnalogy #HackerNews #ngated

I think I've rested enough to start blogging again. What do you think I should write about next?

#blogging #poll #testing #typescript #astro #vitest #playwright

Vitest Browser Mode Guide

https://howtotestfrontend.com/resources/vitest-browser-mode-guide-and-setup-info

#HackerNews #Vitest #Browser #Mode #Guide #Vitest #Testing #Frontend #Development #Testing #Tools

The answer to avoid the backflips when tests need to import from ES modules was to use #Vitest (https://vitest.dev). I am using #rollup, not #vite, but Vitest works beautifully and various Jest-isms like `beforeAll`, `expect`, etc required no changes. #WYSIWYG #JavaScript

I asked Copilot to help me fix tests during transition from Jest to #Vitest . It commented out several assertions and skipped one test completely. Thanks, I guess. Less tests less worries.
#vibecoding #copilot #githubcopilot

[Перевод] Что нового в WebStorm 2025.3

Команда JavaScript for Devs подготовила перевод статьи о нововведениях WebStorm 2025.3. В обновлении — новая тема интерфейса Islands, серьёзные улучшения для монорепозиториев, поддержка удалённой отладки и интеграция умных ИИ-агентов прямо в IDE.

https://habr.com/ru/articles/974648/

#WebStorm #IDE #JetBrains #TypeScript #монорепозитории #Vitest

Un standard pour les lib de validation TypeScript (Zod, Valibot, etc.).

L'objectif est d'avoir une spec standardisée pour que les outils interagissant avec ces schémas fonctionnent quel que soit la lib de validation choisie. Un peu comme les PSR rn PHP.

Vitest supporte d'ailleurs ce format depuis la v4, pour rendre certaines assertions plus faciles à écrire.

🔗 https://standardschema.dev/

#Zod #validation #Vitest #standards #schema

Vitest + Playwright + Visual Regression Testing = ⚡️

The new browser testing features in Vitest 4 are pretty great for testing a small web component package.

https://wbrowar.com/article/code/web-component-testing-with-vitest-4

#vite #vitest #WebComponents #webdev

Nová verze Vitest 4.0 posouvá hranice testování webových aplikací. Přináší stabilní běh testů přímo v prohlížeči, podporu vizuálního regresního testování i chytřejší práci s lokátory a typováním. Vývojáři tak získávají robustnější, rychlejší a přehlednější nástroje pro zajištění kvality UI i logiky aplikací.

https://zdrojak.cz/clanky/vitest-4-0-nove-vizualni-testovani-lepsi-debugging-a-stabilni-browser-mode/

Vitest 4 est de sortie, avec son lot de *breaking changes*.

🔗 https://vitest.dev/guide/migration.html#vitest-4

#Vitest #unittest #nouveauté #release #lib #JavaScript