Rstest

What Rstest is

Rstest is a free, open-source framework for testing JavaScript and TypeScript projects. It builds on Rsbuild and Rspack, using Rspack’s dependency-graph pipeline to bundle tests and SWC transforms to process them. It can use configuration from Rsbuild, Rslib, or Rspack, including aliases, transforms, and plugins. Tests can run in Node.js, simulated DOMs through jsdom or happy-dom, and real browsers. Browser Mode uses Playwright for Chromium, Firefox, and WebKit; the Playwright integration can also run end-to-end tests against local, preview, or deployed URLs. Rstest can load Module Federation remotes in Node, JSDOM, and Browser Mode tests. Testing tools include Jest-compatible assertions, snapshots, mocks, spies, isolation, lifecycle hooks, reporters, and filtering. For CI, it supports multi-project runs, sharding, merged blob reports, and coverage thresholds. The Rstack VS Code extension provides ways to browse, run, and debug tests. Quick start requires Node.js 20.19.0 or newer; the Node.js LTS version is recommended. Rstest is released under the MIT license.

Who it suits

Rstest suits JavaScript and TypeScript teams that want tests across Node.js, simulated DOMs, or real browsers, including teams running multi-project CI workflows. It also fits developers using the Rsbuild, Rslib, or Rspack configuration ecosystem.

Limits

The quick start requires Node.js version 20.19.0 or newer and recommends the Node.js LTS version.

Getting started

1. Visit https://rstest.rs/.
2. Use Node.js version 20.19.0 or newer; the project recommends the LTS version.
3. Reuse configuration from Rsbuild, Rslib, or Rspack if applicable.
4. Use the Rstack VS Code extension to browse, run, and debug tests in VS Code.

Verdict

Rstest combines several test environments with build-configuration reuse and CI features. It is free under the MIT license, but its quick-start requirement is Node.js 20.19.0 or newer.