AdminMetaTagTest.php

<?php

namespace Drupal\Tests\system\Functional\System;

use Drupal\Tests\BrowserTestBase;

/**
 * Confirm that the fingerprinting meta tag appears as expected.
 *
 * @group system
 */
class AdminMetaTagTest extends BrowserTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Verify that the meta tag HTML is generated correctly.
     */
    public function testMetaTag() {
        list($version, ) = explode('.', \Drupal::VERSION);
        $string = '<meta name="Generator" content="Drupal ' . $version . ' (https://www.drupal.org)" />';
        $this->drupalGet('node');
        $this->assertRaw($string, 'Fingerprinting meta tag generated correctly.', 'System');
    }

}