PhpUnitCliTest.php

<?php

namespace Drupal\Tests\Core\Test;

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

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

}