This repo reproduces a Prisma Client codegen quirk in tests and shows a small workaround to run the suite.

• Node.js 18+
• A PostgreSQL database and DATABASE_URL environment variable

npm i

Set DATABASE_URL in your environment (adjust values to your local DB):

export DATABASE_URL="postgresql://user:password@localhost:5432/prisma_bug?schema=public"

npm run generate

npm test

• Prisma Client generated with the current settings emits a top-level const __dirname = '/' inside generated/prisma/client.ts.
• In Jest, this can conflict and cause import/runtime issues.
• As a temporary, non-breaking workaround, the Jest config applies a tiny pre-test text replacement to rename that local __dirname to __prisma_dirname, and updates the call site accordingly. This avoids collisions without touching source code.

You can see the workaround near the top of jest.config.ts.