Testing PlaygroundSimple and complete DOM testing playground that encourage good testing practices.
Best Practices for Writing Tests with React Testing Library
React Testing Library has become the de facto standard for testing React components. Focus on testing from the user's perspective and avoidance of implementation details in tests are some of the main reasons for its success. Properly written tests not only help prevent regressions and buggy code, but in the case of React Testing Library, they also improve the accessibility of components and the ov
Improved Cloudflare Workers testing via Vitest and workerd
Improved Cloudflare Workers testing via Vitest and workerd03/15/2024 This post is also available in Español. Today, we’re excited to announce a new Workers Vitest integration - allowing you to write unit and integration tests via the popular testing framework, Vitest, that execute directly in our runtime, workerd! This integration provides you with the ability to test anything related to your Work
Simple setup: Virtual Screen Reader in Storybook
How to set up Storybook with Guidepup's Virtual Screen Reader and test what the screen reader speaks Recent changes to the @guidepup Virtual Screen Reader library make it ridiculously easy to integrate into Storybook for use in your integration tests. This article shows how to get the basic setup going and how to write your first screen reader test in Storybook. tl;dr The Virtual Screen Reader is
Ultimate Guide to Visual Testing with Playwright
As your web app matures, it becomes challenging to ensure your GUI doesn’t break with any given update. There are a lot of browsers and devices, and countless states for every one of your components. Unit tests ensure your code remains consistent, and E2E tests will ensure your system remains consistent, but neither will catch visual anomalies, layout issues, or platform compatibility issues. Ente
Storybook Test ruuner で安定した Visual Regression Testing を行う
はじめに 株式会社ナレッジワーク Engineering Division のわだまる（@wadackel）です。 ナレッジワークの Web フロントエンド開発では、Storybook を活用したコンポーネント開発を行っています。そして、昨年末により良いコンポーネント開発の基盤整備を進めるべく @storybook/test-runner（以降 Storybook Test ruuner）を導入しました。導入目的としては主に、各 Story に対するスモークテスト、play 関数を活用したコンポーネントテストを行うことです。 さらに、ナレッジワークでは前述した通常のコンポーネントテストに加えて、reg-suit と storycap を利用した Visual Regression Testing（以降 VRT）を行っています。 これまでは Storybook を活用したテストは VRT の
Playwright で一番小さく始める VRT と、次のステップの選択肢
2024/02/21 ビジュアルリグレッションテストツール４選！ユーザーが語る各ツールのメリット で発表したスライドです。 https://trident-qa.connpass.com/event/308664/ 参照したURL - https://playwright.dev/docs/test-snapshots - https://zenn.dev/mh4gf/articles/tiny-vrt-with-github-actions - https://tech.route06.co.jp/entry/2023/03/29/080000
Storybook’s Visual Tests addon enters beta
💡Update, March 12: Storybook 8 and Visual Tests addon are out now! Learn more in the Storybook 8 launch announcement or Visual Tests addon’s launch announcement.Storybook 8 introduces a totally new workflow for safeguarding your UI from unexpected visual changes through Storybook’s Visual Tests addon! Learn how it works and try the beta today. Why visual testing?The challenge of testing UI is tha
2024-02-05のJS: TypeScript 5.4 Beta、Learn Testing/Performance、Interop 2024
JSer.info #679 - TypeScript 5.4 Betaがリリースされました。 Announcing TypeScript 5.4 Beta - TypeScript クロージャーにおけるNarrowing結果の改善、NoInfer Utility Typeが追加されています。 また、ES2024のObject.groupBy/Map.groupByをサポート、Import Attributesのサポートが追加されています。 そのほかには、target: "ES3"やoutオプションなどを非推奨として、次のTypeScript 5.5で削除されることがアナウンスされています。TypeScript 5.5で削除されるオプションは、次のIssueにまとめられています。 Feedback: 5.0 deprecations · Issue #51909 · microsoft/T
Make Your Jest Tests up to 20% Faster by Changing a Single Setting
TL;DR When you have Jest as your test runner, passing the --maxWorkers=50% option will make the tests faster in most cases. For watch mode, use --maxWorkers=25%, and for CI disable Jest workers with --runInBand. You can experiment with the percentage and fine-tune for your particular setup. // package.json { "scripts": { // standalone Jest "test": "jest --maxWorkers=50%", "test:watch": "jest --wat
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GitHub - guidepup/virtual-screen-reader: Virtual Screen Reader is a screen reader simulator for unit tests.
Support for React Server Components · Issue #1209 · testing-library/react-testing-library
GitHub - pashak09/ts-expect-error-validator: Command-line tool to validate expected TypeScript errors
TDD Conf 10 Jul 2021
GitHub - argos-ci/jest-puppeteer: Run tests using Jest & Puppeteer 🎪✨
Release v2.0.0 · js-reporters/js-reporters
GitHub - udacity/cloudflare-typescript-workers: Types and mocks for building a tested Typescript Cloudflare Worker, generates three NPM packages
Annie Sullivan on Twitter: "@soulislove Thanks! We wait for battery temperature of 35C and CPU temperature of 38C: https://t.co/LAeQXcRF5R Som… https://t.co/saM4s4ebZu"