name: Test and lint

on:
  push:
  pull_request:

permissions:
  contents: read

jobs:
  tests:
    name: Run tests

    strategy:
      fail-fast: false
      matrix:
        # Python 3.4 disabled, due to problems with GitHub Actions.
        python-version: [3.10-dev, 3.9, 3.8, 3.7, 3.6, 3.5, 2.7]

    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v2

      - name: Set up Python
        uses: actions/setup-python@v2
        with:
          python-version: ${{ matrix.python-version }}

      - name: Load pip cache
        uses: actions/cache@v2
        with:
          path: ~/.cache/pip
          key: ${{ runner.os }}-pip-${{ hashFiles('**/test-requirements.txt') }}
          restore-keys: |
            ${{ runner.os }}-pip-

      - name: Install dependencies
        run: |
          pip install --upgrade pip
          pip install -r test-requirements.txt

      - name: Run tests
        env:
          PYTHON_VERSION: ${{ matrix.python-version }}
        run: |
          export PYTHONPATH=`python -c "import sys; print('python2' if sys.version.startswith('2') else 'src')"`
          if [[ $PYTHON_VERSION < '3.7' ]]; then pytest $PYTHONPATH; fi

          if [[ $PYTHON_VERSION < '3.5' ]]; then pip install -U .; fi
          export PYTHONPATH=`python -c "import sys; print('typing_extensions/src_py2' if sys.version.startswith('2') else 'typing_extensions/src_py3')"`
          pytest $PYTHONPATH

  linting:
    name: Lint

    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v2

      - name: Set up Python
        uses: actions/setup-python@v2
        with:
          python-version: 3.9

      - name: Load pip cache
        uses: actions/cache@v2
        with:
          path: ~/.cache/pip
          key: ${{ runner.os }}-pip-${{ hashFiles('**/test-requirements.txt') }}
          restore-keys: |
            ${{ runner.os }}-pip-

      - name: Install dependencies
        run: |
          pip install --upgrade pip
          pip install -r test-requirements.txt

      - name: Lint implementation
        run: flake8

      - name: Lint tests
        run: flake8 --config=.flake8-tests src/test_typing.py python2/test_typing.py typing_extensions/src_py2/test_typing_extensions.py typing_extensions/src_py3/test_typing_extensions.py