This guide shows you how to give this package's test suite the Postgres
server it needs, so that mix test and mix quality run green on your
machine.
The suite includes database-backed tests against a real Postgres server.
ADR-0005 (docs/adr/0005-ecto-in-package-and-postgres-test-harness.md in the
repository) rejects a skip tag for when one is absent, so mix quality and
mix test both need one reachable.
Start the database
Start it once with:
docker compose up -d dbwhich brings up postgres:17 on localhost:5432 with user/password
postgres.
Use a server you already run
Override host, port, user, password, or database name with the PGHOST,
PGPORT, PGUSER, PGPASSWORD, and PGDATABASE env vars (see
config/test.exs for the defaults) if a server is already running
elsewhere.
Run the suite
mix testor the full quality gate, which runs the suite with coverage:
mix quality