test: migrate from jest to vitest 3.1.4

[MikeMcC399]

• closes Migrate away from Jest v29 #258

Situation

• Repo tests (npm test) are run with Jest

• Installing [email protected] or the following beta version [email protected] shows deprecations, and given that these are unaddressed issues https://github.com/jestjs/jest/issues it seems unlikely that they will be resolved in the immediate future:

  npm warn deprecated [email protected]: This module is not supported, and leaks memory. Do not use it. Check out lru-cache if you want a good and tested way to coalesce async requests by a key value, which is much more comprehensive and powerful.
  npm warn deprecated [email protected]: Glob versions prior to v9 are no longer supported

• The last Jest blog post was announcing the current version Jest 29 in Aug 2022

• Vitest is a well-maintained testing framework that has many similarities to Jest. Its documentation explains specifically about Migrating from Jest.

Change

• Migrate from Jest to [email protected]

• Simplify scripts to define and use only npm test in vitest run mode. Remove start script to run Jest in watch mode.

• Replace jest.config.js with vitest.config.mts

• Update CONTRIBUTING document accordingly

Verification

On Ubuntu 24.04.2 LTS, Node.js 22.16.0 LTS

Execute the following and confirm that all tests run without errors:

npm ci
npm run lint
npm run test

[cypress-app-bot]

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[jennifer-shehane]

Nice! Simpler than I thought. Jest vs Vitest - looks to be running all the tests.

[MikeMcC399]

@jennifer-shehane

Nice! Simpler than I thought. Jest vs Vitest - looks to be running all the tests.

The migration was simpler than I thought as well. I just wanted to wait until we had got rid of the legacy configs, otherwise it would have been a bit more complicated.

[jennifer-shehane]

🎉 This PR is included in version 5.0.1 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀