light-runner/docker-compose.test.yml at main · enixCode/light-runner · GitHub

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# =============================================================================
# Compose file for `npm run test:docker`
# =============================================================================
#
# Spawns ONE disposable container that runs the full light-runner test suite.
# See Dockerfile.test for the harness image rationale.
#
# Sibling-container pattern: /var/run/docker.sock is bind-mounted so the tests
# can spawn real alpine/python/node/... containers on the HOST daemon. The
# spawned containers are siblings of this one (not nested). Requires Docker
# socket access on the host - on Windows/macOS Docker Desktop handles the
# platform-specific translation.
#
# Lifecycle:
#   - `docker compose -f docker-compose.test.yml run --rm --build test`
#     builds the image (cached after first time), starts one container,
#     runs the tests, and auto-removes the container at exit.
#   - The named volumes survive across runs for fast iteration:
#       test-node-modules -> /work/node_modules  (npm ci cache)
#       test-dist         -> /work/dist          (compiled TS)
#       test-npm-cache    -> /root/.npm          (npm download cache)
#     Clean them with `docker compose -f docker-compose.test.yml down -v`.
# =============================================================================

services:
  test:
    build:
      context: .
      dockerfile: Dockerfile.test
    image: light-runner-tests
    working_dir: /work
    volumes:
      # Live source (the container sees host edits immediately):
      - .:/work
      # Persistent build/install caches to skip re-install between runs:
      - test-node-modules:/work/node_modules
      - test-dist:/work/dist
      - test-npm-cache:/root/.npm
      # Host docker socket for the sibling-container pattern:
      - /var/run/docker.sock:/var/run/docker.sock
    environment:
      CI: "1"
    # No interactive TTY - we want clean streaming of test-runner output:
    tty: false
    stdin_open: false

volumes:
  test-node-modules:
  test-dist:
  test-npm-cache: