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: ["7.2", "7.3", "7.4", "8.0"]
        wp: ["latest"]
        experimental: [false]

        include:
          - php: "8.1"
            wp: "trunk"
            experimental: true
          - php: "8.2"
            wp: "trunk"
            experimental: true
          - php: "8.0"
            wp: "5.6"
            experimental: true
          - php: "7.4"
            wp: "5.5"
            experimental: true
          - php: "7.4"
            wp: "latest"
            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@v3

      - name: Install PHP
        uses: shivammathur/setup-php@v2
        with:
          php-version: ${{ matrix.php }}
          coverage: none
          extensions: mysqli

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

      # Determine the type of Composer install which is needed.
      # 1. WP 5.9 or higher - all PHPUnit versions needed are supported, use the most appropriate one.
      # 2. WP 5.9 or higher with PHP 8.2 (RC) - not all dependencies of PHPUnit have declared PHP 8.2 compatibility, so needs ignore platform.
      # 3. WP < 5.9 with PHP < 8.0 - PHPUnit 5 - 7 supported, use the most appropriate one.
      # 4. WP < 5.9 with PHP 8.0 or higher - PHPUnit 5 - 7 supported, needs ignore platform reqs to install PHPUnit 7 for PHP >= 8.0.
      - name: Determine the type of Composer install to use
        id: composer_toggle
        run: |
          if [[ "${{ matrix.wp }}" =~ ^(trunk|latest|5\.9|[6789]\.[0-9])$ ]]; then
            if [[ "${{ matrix.php }}" != "8.2" ]]; then
              echo '::set-output name=TYPE::1'
            else
              echo '::set-output name=TYPE::2'
            fi
          elif [[ "${{ matrix.php }}" > "7.4" ]]; then
            echo '::set-output name=TYPE::4'
          else
            echo '::set-output name=TYPE::3'
          fi

      # Remove the PHPUnit requirement for WP 5.9 and higher in favour of letting the Polyfills manage it.
      # The Composer command will exit with error code 2 as the package is not removed, so ignore "failure" of this step.
      - name: Conditionally remove PHPUnit requirement
        if: ${{ steps.composer_toggle.outputs.TYPE == '1' || steps.composer_toggle.outputs.TYPE == '2' }}
        continue-on-error: true
        run: composer remove --dev phpunit/phpunit --no-update --no-interaction || true

      # Install dependencies and handle caching in one go.
      # @link https://github.com/marketplace/actions/install-composer-dependencies
      - name: Install Composer dependencies - normal
        if: ${{ steps.composer_toggle.outputs.TYPE == '1' || steps.composer_toggle.outputs.TYPE == '3' }}
        uses: "ramsey/composer-install@v2"

      # For PHP 8.0 and above on WP 5.2 - 5.8, we need to install with ignore platform reqs as not all dependencies allow it.
      - name: Install Composer dependencies with ignore platform reqs
        if: ${{ steps.composer_toggle.outputs.TYPE == '2' || steps.composer_toggle.outputs.TYPE == '4' }}
        uses: "ramsey/composer-install@v2"
        with:
          composer-options: --ignore-platform-req=php

      - name: Tool versions
        continue-on-error: true
        run: |
          php --version
          composer --version
          vendor/bin/phpunit --version

      - 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