배경

결론

name: PHPUnit
on:
.
.
.
#略


jobs:
  test-php:
    name: Test PHP
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        parallelism: [5]
        id: [0,1,2,3,4]
.
.
.
#略
    services:
      mysql:
        image: mysql:5.7
.
.
.
#略
    steps:
      - uses: actions/checkout@v2
      - name: Setup PHP
.
.
.
#略
      - name: Run Tests
        run: |
          find tests/ -name '*Test.php' | sort | awk "NR % ${{ matrix.parallelism }} == ${{ matrix.id }}" | xargs php ./create_multithread_phpunit_xml.php
          ./vendor/bin/phpunit --configuration ./ci_phpunit.xml

<?php

$baseDir = realpath('./');
$files   = array_slice($argv, 1);
$xmlFileStringData = [];
foreach ($files as $file) {
    $xmlFileStringData[] = "<file>{$baseDir}/{$file}</file>";
}
$testFileString = implode("\n", $xmlFileStringData);
$template = <<<XML
<?xml version="1.0" encoding="UTF-8"?>
<phpunit backupGlobals="false"
         backupStaticAttributes="false"
         bootstrap="vendor/autoload.php"
         colors="true"
         convertErrorsToExceptions="true"
         convertNoticesToExceptions="true"
         convertWarningsToExceptions="true"
         processIsolation="false"
         stopOnFailure="false">
        <testsuite name="Test Case">
            {$testFileString}
        </testsuite>
    <php>
        <env name="APP_ENV" value="testing"/>
        <env name="CACHE_DRIVER" value="array"/>
        <env name="SESSION_DRIVER" value="array"/>
        <env name="QUEUE_DRIVER" value="sync"/>
        <env name="DB_DATABASE" value="test_db"/>
        <env name="DB_USERNAME" value="root"/>
        <env name="DB_PASSWORD" value="root"/>
    </php>
</phpunit>
XML;

file_put_contents("ci_phpunit.xml", $template);

결과

참고 기사