PhpUnitCliTest.php

<?php

declare (strict_types=1);
namespace Drupal\Tests\Core\Test;

use Drupal\Tests\UnitTestCase;
use Symfony\Component\Process\Process;

/**
 * @group TestSuites
 * @group Test
 * @group #slow
 */
class PhpUnitCliTest extends UnitTestCase {
    
    /**
     * Ensure that the test suites are able to discover tests without incident.
     *
     * Generate the list of tests for all the tests that PHPUnit can discover.
     * The goal here is to successfully generate the list, without any
     * duplicate namespace errors, deprecation errors or so forth. This keeps
     * us from committing tests which don't break under run-tests.sh, but do
     * break under the PHPUnit CLI test runner tool.
     */
    public function testPhpUnitListTests() : void {
        $command = [
            'vendor/bin/phpunit',
            '--configuration',
            'core',
            '--list-tests',
        ];
        $process = new Process($command, $this->root);
        $process->setTimeout(300)
            ->setIdleTimeout(300)
            ->run();
        $this->assertEquals(0, $process->getExitCode(), 'COMMAND: ' . $process->getCommandLine() . "\n" . 'OUTPUT: ' . $process->getOutput() . "\n" . 'ERROR: ' . $process->getErrorOutput() . "\n");
    }

}