simpletest_phpunit_browsertest.php

<?php

// phpcs:ignoreFile
namespace Drupal\Tests\simpletest\Functional;

use Drupal\Tests\BrowserTestBase;

/**
 * A PHPUnit-based browser test that will be run from Simpletest.
 *
 * To avoid accidentally running it is not in a normal PSR-4 directory.
 *
 * @group simpletest
 */
class SimpletestPhpunitBrowserTest extends BrowserTestBase {
    
    /**
     * Dummy test that logs the visited front page for HTML output.
     */
    public function testOutput() {
        $this->drupalGet('<front>');
        $this->assertSession()
            ->responseContains('<h2>TEST escaping</h2>');
    }

}