on:
  pull_request:
    branches:
      - main
  # Trigger workflow on GitHub merge queue events
  # See https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#merge_group
  merge_group:
    types: [checks_requested]
name: unittest

permissions:
  contents: read

jobs:
  unit:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        python: ['3.7', '3.8', '3.9', '3.10', "3.11", "3.12"]
    steps:
    - name: Checkout
      uses: actions/checkout@v4
      # Use a fetch-depth of 2 to avoid error `fatal: origin/main...HEAD: no merge base`
      # See https://github.com/googleapis/google-cloud-python/issues/12013
      # and https://github.com/actions/checkout#checkout-head.
      with:
        fetch-depth: 2
    - name: Setup Python
      uses: actions/setup-python@v5
      with:
        python-version: ${{ matrix.python }}
    - name: Install nox
      run: |
        python -m pip install --upgrade setuptools pip wheel
        python -m pip install nox
    - name: Run unit tests
      env:
        COVERAGE_FILE: .coverage-${{ matrix.python }}
        BUILD_TYPE: presubmit
        TEST_TYPE: unit
        PY_VERSION: ${{ matrix.python }}
      run: |
        ci/run_conditional_tests.sh
    - name: Upload coverage results
      uses: actions/upload-artifact@v4
      with:
        name: coverage-artifact-${{ '{{' }} matrix.python {{ '}}' }}
        path: .coverage-${{ matrix.python }}
  prerelease:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        python: ['3.12']
    steps:
    - name: Checkout
      uses: actions/checkout@v4
      # Use a fetch-depth of 2 to avoid error `fatal: origin/main...HEAD: no merge base`
      # See https://github.com/googleapis/google-cloud-python/issues/12013
      # and https://github.com/actions/checkout#checkout-head.
      with:
        fetch-depth: 2
    - name: Setup Python
      uses: actions/setup-python@v5
      with:
        python-version: ${{ matrix.python }}
    - name: Install nox
      run: |
        python -m pip install --upgrade setuptools pip wheel
        python -m pip install nox
    - name: Run prerelease tests
      env:
        BUILD_TYPE: presubmit
        TEST_TYPE: prerelease
        PY_VERSION: ${{ matrix.python }}
      run: |
        ci/run_conditional_tests.sh

  cover:
    runs-on: ubuntu-latest
    needs:
        - unit
    steps:
    - name: Checkout
      uses: actions/checkout@v4
      # Use a fetch-depth of 2 to avoid error `fatal: origin/main...HEAD: no merge base`
      # See https://github.com/googleapis/google-cloud-python/issues/12013
      # and https://github.com/actions/checkout#checkout-head.
      with:
        fetch-depth: 2
    - name: Setup Python
      uses: actions/setup-python@v5
      with:
        python-version: "3.10"
    - name: Set number of files changes in packages directory
      id: packages
      run: echo "::set-output name=num_files_changed::$(git diff HEAD~1 -- packages | wc -l)"
    - name: Install coverage
      if: steps.packages.num_files_changed > 0
      run: |
        python -m pip install --upgrade setuptools pip wheel
        python -m pip install coverage
    - name: Download coverage results
      if: ${{ steps.date.packages.num_files_changed > 0 }}
      uses: actions/download-artifact@v4
      with:
        path: .coverage-results/
    - name: Report coverage results
      if: ${{ steps.date.packages.num_files_changed > 0 }}
      run: |
        find .coverage-results -type f -name '*.zip' -exec unzip {} \;
        coverage combine .coverage-results/**/.coverage*
        coverage report --show-missing --fail-under=100