name: Optimized Test

on: [push, pull_request]

jobs:
  test:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        shard: [1, 2, 3, 4]

    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: '20'

      - name: Install dependencies
        run: npm ci

      - name: Run tests (shard ${{ matrix.shard }})
        run: npm run test:unit -- --shard=${{ matrix.shard }}/4

      - name: Upload coverage
        if: matrix.shard == 4
        uses: codecov/codecov-action@v4