name: Tests · Go

# Fast unit tests for the Go side of the monorepo. Runs on every push and pull
# request whose path filter matches a Go source directory. The module list
# grows as new go.work modules (gateway, pkg/*, platform/*) are added by later
# stages.

on:
  push:
    paths:
      - 'backend/**'
      - 'go.work'
      - 'go.work.sum'
      - '.gitea/workflows/go-unit.yaml'
      - '!**/*.md'
  pull_request:
    paths:
      - 'backend/**'
      - 'go.work'
      - 'go.work.sum'
      - '.gitea/workflows/go-unit.yaml'
      - '!**/*.md'

jobs:
  test:
    runs-on: ubuntu-latest
    defaults:
      run:
        shell: bash
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Fetch scrabble-solver (sibling)
        # The engine package consumes scrabble-solver in-process; go.work points
        # its bare module path at this sibling checkout. The repository is public,
        # so the clone needs no credentials. It tracks master HEAD (see PLAN.md
        # TODO-1 for the move to a published, versioned module).
        run: git clone --depth 1 https://gitea.iliadenisov.ru/developer/scrabble-solver.git "${GITHUB_WORKSPACE}/../scrabble-solver"

      - name: Set up Go
        uses: actions/setup-go@v5
        with:
          go-version-file: go.work
          cache: true

      - name: gofmt
        run: |
          unformatted="$(gofmt -l .)"
          if [ -n "$unformatted" ]; then
            echo "gofmt needed on:"; echo "$unformatted"; exit 1
          fi

      - name: vet
        run: go vet ./backend/...

      - name: build
        run: go build ./backend/...

      - name: test
        # -count=1 disables the test cache so a green run never depends on a
        # previous runner's cached state. BACKEND_DICT_DIR points the engine
        # tests at the committed DAWGs in the sibling checkout.
        env:
          BACKEND_DICT_DIR: ${{ github.workspace }}/../scrabble-solver/dawg
        run: go test -count=1 ./backend/...