services:
  postgres:
    image: docker.io/library/postgres:16-alpine
    # Tests hardcode host=localhost port=5433, so postgres listens on 5433
    # internally and the tests container joins its network namespace below.
    command: ["postgres", "-p", "5433"]
    environment:
      POSTGRES_DB: broker_test
      POSTGRES_USER: user
      POSTGRES_PASSWORD: password
    ports:
      - "5434:5433"
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U user -d broker_test -p 5433"]
      interval: 2s
      timeout: 3s
      retries: 30

  tests:
    build:
      context: .
      dockerfile: Dockerfile.test
    network_mode: "service:postgres"
    depends_on:
      postgres:
        condition: service_healthy