name: Tests

on:
  push:
    branches: [main]
  pull_request:

jobs:
  test-features:
    name: test-features.mjs (smoke)
    runs-on: ubuntu-latest

    strategy:
      matrix:
        node-version: ['20', '24']
      fail-fast: false

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Setup Node ${{ matrix.node-version }}
        uses: actions/setup-node@v4
        with:
          node-version: ${{ matrix.node-version }}

      - name: Detect package-lock
        id: detect_lock
        shell: bash
        run: |
          if [ -f package-lock.json ]; then
            DEPS="$(node -p "Object.keys(require('./package.json').dependencies || {}).length")"
            if [ "$DEPS" -gt 0 ]; then
              echo "needs_install=true" >> $GITHUB_OUTPUT
            else
              echo "needs_install=false" >> $GITHUB_OUTPUT
            fi
          else
            echo "needs_install=false" >> $GITHUB_OUTPUT
          fi

      - name: npm install (if dependencies present)
        if: steps.detect_lock.outputs.needs_install == 'true'
        run: npm ci

      - name: Run npm test
        shell: bash
        run: |
          # Bootstrap tolerance: if test-features.mjs does not exist yet (Phase 0
          # ships before Phase 1 lands the test harness), skip with a notice.
          # The `npm test` script is configured in package.json from day one, so
          # checking script presence is not a useful gate — the file must exist.
          if [ ! -f test-features.mjs ]; then
            echo "::notice::test-features.mjs not present yet (Phase 0 bootstrap phase). Skipping. Test harness lands with Phase 1 per docs/adr/0001 / spec §6."
            exit 0
          fi
          npm test