[Tony133]

Proposal:

[email protected] bumped cookie to 2.x, which is ESM-only. The typescript-jest suite runs in CommonJS through ts-jest, so Jest can no longer require() cookie/dist/index.js and every app.inject() call fails:

https://github.com/fastify/fastify-autoload/actions/runs/40437079305/job/122488466342?pr=535#step:5:88

The failure only shows up on a fresh install (no lockfile in the repo), which is why it appeared on CI before local environments with an older node_modules.

Changes:

• Add transformIgnorePatterns so cookie is no longer skipped by the transform
• Extend the ts-jest transform to .js with allowJs: true so cookie is compiled to CJS

The exception is scoped to cookie/ only; the rest of node_modules is still ignored. Works on every Node version in the CI matrix, independent of Jest's native require(esm) support.

[ilteoood]

I think it would be worth to move these settings in their own jest.config.js file, so that we can avoid bloating the package.json

[Tony133]

I think it would be worth to move these settings in their own jest.config.js file, so that we can avoid bloating the package.json

Done, moved to jest.config.js to match vitest.config.ts, and removed the jest key from package.json. See commit 28315e6.