bun loads a plain `.env` into process.env before anything runs, and
tests/helpers/env.ts read that as a deliberate export, so it beat `.env.test`
outright. `scripts/test.sh api` therefore pointed the api suites at whatever
deployment `.env` describes: `prisma db push --accept-data-loss` for the
schema, then a truncate of every table between tests. The e2e half was worse,
because playwright.config.ts built and started the app with that DATABASE_URL
and those R2 credentials, then wrote fixtures into it. CI never saw any of
this: a runner has no `.env`.
Three changes, in order of what each one catches:
- helpers/dev-env.ts drops the values bun copied out of a development env file,
leaving `.env.test` to fill them. Only values that match the file
character-for-character go, so a real export still wins and the per-suite
databases of a parallel api run keep working.
- helpers/test-database.ts refuses a DATABASE_URL whose database name is not
marked as a test one, at the single point every path into the setup passes
through. This is the backstop, not the fix.
- playwright.config.ts blanks the variables a development env file defines and
the config does not. Dropping them from process.env is not enough there:
`next build` and `next start` run @next/env themselves and read the files
again. That is also why a local e2e run could not build at all (a set
DISABLE_RATE_LIMIT throws in lib/rate-limit.ts under NODE_ENV=production) and
why auth.spec.ts failed on a machine with SMTP configured.
`scripts/test.sh` now creates `.env.test` from the committed example instead of
asking for a one-line copy, so the guard above is something nobody has to meet.
