unit-tests.yml

name: Unit Tests

on:
  # Run on all pushes and on all pull requests.
  # Prevent the build from running when there are only irrelevant changes.
  push:
    paths-ignore:
      - '**.md'
      - '**.txt'
  pull_request:
    paths-ignore:
      - '**.md'
      - '**.txt'
  # Allow manually triggering the workflow.
  workflow_dispatch:

jobs:
  test:
    runs-on: ubuntu-latest

    strategy:
      fail-fast: false
      matrix:
        # Notes regarding supported versions in WP:
        # The base matrix only contains the PHP versions which are supported on all supported WP versions.
        php: ['7.1', '7.2', '7.3', '7.4']
        wp: ['latest']
        experimental: [false]

        include:
          # Complement the builds run via the matrix with high/low WP builds for PHP 7.4 and 8.0.
          # PHP 8.0 is sort of supported since WP 5.6.
          # PHP 7.4 is supported since WP 5.3.
          - php: '8.0'
            wp: 'latest'
            experimental: true
          - php: '8.0'
            wp: '5.6'
            experimental: true
          - php: '7.4'
            wp: '5.3'
            experimental: true
          - php: '7.1'
            wp: '5.1'
            experimental: true
          - php: '7.4'
            wp: 'nightly'
            experimental: true

    name: "PHP ${{ matrix.php }} - WP ${{ matrix.wp }}"

    continue-on-error: ${{ matrix.experimental }}

    services:
      mysql:
        # WP 5.4 is the first WP version which largely supports MySQL 8.0.
        # See: https://core.trac.wordpress.org/ticket/49344
        # During the setting up of these tests, it became clear that MySQL 8.0
        # in combination with PHP < 7.4 is not properly/sufficiently supported
        # within WP Core.
        # See: https://core.trac.wordpress.org/ticket/52496
        image: mysql:${{ ( matrix.wp == 5.3 && '5.6' ) || ( (matrix.wp < 5.4 || matrix.php < 7.4) && '5.7' ) || '8.0' }}
        env:
          MYSQL_ALLOW_EMPTY_PASSWORD: false
        ports:
          - 3306:3306
        options: --health-cmd="mysqladmin ping" --health-interval=10s --health-timeout=10s --health-retries=10

    steps:
      - name: Checkout code
        uses: actions/checkout@v2

      - name: Install PHP
        uses: shivammathur/setup-php@v2
        with:
          php-version: ${{ matrix.php }}
          tools: phpunit-polyfills
          coverage: none
          # The PHP 5.6 and 7.0 images don't include mysql[i] by default.
          extensions: mysqli

      - name: Set up WordPress
        run: phpunit/install.sh wordpress_test root '' 127.0.0.1:3306 ${{ matrix.wp }}

      # On WP 5.2, PHPUnit 5.x, 6.x and 7.x are supported.
      # On PHP >= 8.0, PHPUnit 7.5+ is needed, no matter what.
      - name: Determine supported PHPUnit version
        id: set_phpunit
        run: |
          if [[ "${{ matrix.php }}" > "7.4" ]]; then
            echo '::set-output name=PHPUNIT::7.5.*'
          else
            echo '::set-output name=PHPUNIT::5.7.*||6.*||7.5.*'
          fi

      - name: 'Composer: set up PHPUnit'
        run: composer require --no-update phpunit/phpunit:"${{ steps.set_phpunit.outputs.PHPUNIT }}"

      # Install dependencies and handle caching in one go.
      # @link https://github.com/marketplace/actions/install-composer-dependencies
      - name: Install Composer dependencies for PHP < 8.0
        if: ${{ matrix.php < 8.0 }}
        uses: "ramsey/composer-install@v2"

      # For the PHP 8.0 and above, we need to install with ignore platform reqs as not all dependencies allow it yet.
      - name: Install Composer dependencies for PHP >= 8.0
        if: ${{ matrix.php >= 8.0 }}
        uses: "ramsey/composer-install@v2"
        with:
          composer-options: --ignore-platform-reqs

      - name: 'Run Composer Update'
        run: |
          composer update --ignore-platform-reqs

      - name: Tool versions
        run: |
          php --version
          composer --version
          phpunit --version
          which phpunit

      - name: Run the unit tests - single site
        run: vendor/bin/phpunit

      - name: Run the unit tests - multisite
        run: vendor/bin/phpunit
        env:
          WP_MULTISITE: 1