test-working-directory.yml

---
name: "GH Action `working-directory:` test"

on: push  # yamllint disable-line rule:truthy

jobs:
  setup:
    runs-on: ubuntu-latest
    steps:
      - name: Set up initial test repository
        run: |
          mkdir -p test-repo
          cd test-repo
          git init
          git config user.email "test@example.com"
          git config user.name "Test User"
          git commit --allow-empty -m "Initial empty commit"
          echo 'def hello(): return "Hello, World!"' > test.py
          git add test.py
          git commit -m "Add test.py file"
          echo 'def  hello():    return  "Hello, World!"' > test.py

      - name: Upload test repository
        uses: actions/upload-artifact@v3
        with:
          name: test-repo
          path: test-repo

  test:
    needs: setup
    runs-on: ubuntu-latest
    strategy:
      matrix:
        scenario:
          - name: no-work-dir
            working_directory: null  # Consider it omitted
            src: test.py
            options: --check --diff
            expected_exitcode: 2
          - name: right-workdir
            working_directory: test-repo
            src: test.py
            options: --check --diff
            expected_exitcode: 1
          - name: wrong-work-dir
            working_directory: non-existent-dir
            src: test.py
            options: --check --diff
            expected_exitcode: 21
          - name: file-not-found
            working_directory: test-repo
            src: non_existent_file.py
            options: --check --diff
            expected_exitcode: 2
          - name: invalid-arguments
            working_directory: test-repo
            src: test.py
            options: --invalid-option
            expected_exitcode: 3
          - name: missing-deps
            working_directory: test-repo
            src: test.py
            options: --flynt  # not yet supported by the action
            expected_exitcode: 4

    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 10

      - name: Download test repository
        uses: actions/download-artifact@v3
        with:
          name: test-repo
          path: ${{ runner.temp }}/test-repo

      - name: "Run Darker - ${{ matrix.scenario.name }}"
        uses: ./
        continue-on-error: true
        id: darker-run
        with:
          version: "@gh-action-working-directory"
          options: ${{ matrix.scenario.options }}
          # In the action, '.' is the default value used if `working-directory` omitted
          working-directory: >-
            ${{
              matrix.scenario.working_directory == null && '.'
              || format('{0}/{1}', runner.temp, matrix.scenario.working_directory)
            }}
          src: ${{ matrix.scenario.src }}
          revision: HEAD

      - name: Check exit code
        if: >-
          steps.darker-run.outputs.exitcode != matrix.scenario.expected_exitcode
        run: |
          echo "::error::Expected exit code ${{ matrix.scenario.expected_exitcode }}"
          echo "::error::Darker exited with ${{ steps.darker-run.outputs.exitcode }}"
          exit 1

      - name: Verify diff output for right-workdir scenario
        if: >
          matrix.scenario.name == 'right-workdir' &&
          !contains(steps.darker-run.outputs.stdout, '@@')
        run: |
          echo "::error::Darker did not output a diff as expected"
          exit 1