SnapOtter/.github/workflows/mutation.yml

name: Mutation Testing

on:
  workflow_dispatch:
  schedule:
    - cron: "0 4 * * 0"

permissions:
  contents: read

jobs:
  mutation:
    name: Stryker (${{ matrix.lane }})
    runs-on: ubuntu-latest
    timeout-minutes: 120
    strategy:
      # One broken lane must not hide the others. This is exactly how the
      # image-engine lane silently rotted: a bad babel override made Stryker
      # error, but with a single job nobody was watching the other packages.
      fail-fast: false
      matrix:
        include:
          - lane: image-engine
            run: pnpm --filter @snapotter/image-engine exec stryker run
            incremental: packages/image-engine/reports/stryker-incremental.json
            report: packages/image-engine/reports/mutation/
          - lane: media-engine
            run: pnpm --filter @snapotter/media-engine exec stryker run
            incremental: packages/media-engine/reports/stryker-incremental.json
            report: packages/media-engine/reports/mutation/
          - lane: doc-engine
            run: pnpm --filter @snapotter/doc-engine exec stryker run
            incremental: packages/doc-engine/reports/stryker-incremental.json
            report: packages/doc-engine/reports/mutation/
          - lane: api
            run: packages/image-engine/node_modules/.bin/stryker run stryker.api.config.json
            incremental: reports/stryker-api-incremental.json
            report: reports/mutation-api/
          - lane: shared
            run: packages/image-engine/node_modules/.bin/stryker run stryker.shared.config.json
            incremental: reports/stryker-shared-incremental.json
            report: reports/mutation-shared/
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
      - uses: ./.github/actions/setup
      - name: Restore incremental mutation state
        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
        with:
          path: ${{ matrix.incremental }}
          key: stryker-incremental-${{ matrix.lane }}-${{ github.sha }}
          restore-keys: |
            stryker-incremental-${{ matrix.lane }}-
      - name: Run mutation tests
        run: ${{ matrix.run }}
      - name: Upload mutation report
        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        if: always()
        with:
          name: mutation-report-${{ matrix.lane }}
          path: ${{ matrix.report }}
          retention-days: 30
          if-no-files-found: ignore