DrupalComponentTestListenerTrait.php

<?php

namespace Drupal\Tests\Listeners;

use Drupal\KernelTests\KernelTestBase;
use Drupal\Tests\BrowserTestBase;
use Drupal\Tests\UnitTestCase;
use PHPUnit\Framework\AssertionFailedError;

/**
 * Ensures that no component tests are extending a core test base class.
 *
 * @internal
 */
trait DrupalComponentTestListenerTrait {
    
    /**
     * Reacts to the end of a test.
     *
     * @param \PHPUnit\Framework\Test $test
     *   The test object that has ended its test run.
     * @param float $time
     *   The time the test took.
     */
    protected function componentEndTest($test, $time) {
        
        /** @var \PHPUnit\Framework\Test $test */
        if (substr($test->toString(), 0, 22) == 'Drupal\\Tests\\Component') {
            if ($test instanceof BrowserTestBase || $test instanceof KernelTestBase || $test instanceof UnitTestCase) {
                $error = new AssertionFailedError('Component tests should not extend a core test base class.');
                $test->getTestResultObject()
                    ->addFailure($test, $error, $time);
            }
        }
    }

}