build.yml

# .github/workflows/build.yml
name: "build"

on: [ push, pull_request, workflow_dispatch ]

jobs:

    build:
        name:    "PHP ${{ matrix.php}} / ${{matrix.php_unit}} "
        runs-on: ubuntu-18.04

        strategy:
            matrix:
                include:
                  - php: "7.0"
                    php_unit: 6
                  - php: "7.1"
                    php_unit: 7
                  - php: "7.2"
                    php_unit: 7
                  - php: "7.3"
                    php_unit: 7
                  - php: "7.2"
                    php_unit: 8
                  - php: "7.3"
                    php_unit: 8
                  - php: "8.1"
                    php_unit: 9

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

            -   name: "Build environment"
                uses: shivammathur/setup-php@v2
                with:
                    php-version: "${{ matrix.php }}"

            -   name: "Dependencies"
                run:  |
                      php --version
                      composer --version
                      composer require phpunit/phpunit:^${{matrix.php_unit}} --update-with-dependencies
                      composer install --no-interaction
            -   name: "Tests"
                run:  ./run_tests.sh