Expert guidance for writing, configuring, and running tests with Rstest — the Rspack-powered. JavaScript/TypeScript testing framework with Jest-compatible APIs and native ESM/TypeScript support. Covers setup, configuration (rstest.config.ts), mocking (rs.mock, rstest.fn, rstest.spyOn), fake timers, snapshots, DOM testing (jsdom/happy-dom), Browser Mode (Playwright), React/Vue component testing, code coverage (istanbul), multi-project testing, in-source tests, and integration with Rsbuild/Rslib via official adapters (@rstest/adapter-rsbuild, @rstest/adapter-rslib). Use this skill whenever the user mentions "rstest", "@rstest/core", is writing or debugging tests in an Rspack/Rsbuild/Rslib project, migrating from Jest or Vitest to Rstest, or needs help with any testing workflow that involves the Rstack ecosystem. Also trigger when the user asks about mocking with rs.mock, configuring test environments, or setting up browser-based testing with @rstest/browser.
How to install rstest?
weaaare/a11y-agents-kit/rstest
$npx -y skills add weaaare/a11y-agents-kit --skill rstestInstalls into the current project.
›Prefer a prompt? Paste this to your agent
Run `npx skills use "https://github.com/weaaare/a11y-agents-kit" --skill "weaaare/a11y-agents-kit/rstest"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/weaaare/a11y-agents-kit" that are relevant to the current task. Run `npx skills add "https://github.com/weaaare/a11y-agents-kit"` and select the relevant skills, then follow their instructions.
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