fix: #3578193 CommentTokensHooks passes NULL to...

            break;

          case 'homepage':

            $replacements[$original] = UrlHelper::stripDangerousProtocols($comment->getHomepage());

            $homepage = $comment->getHomepage();

            $replacements[$original] = $homepage ? UrlHelper::stripDangerousProtocols($homepage) : '';

            break;

          case 'title':

<?php

declare(strict_types=1);

namespace Drupal\Tests\comment\Kernel;

use Drupal\comment\Entity\Comment;

use Drupal\comment\Tests\CommentTestTrait;

use Drupal\Component\Utility\UrlHelper;

use Drupal\entity_test\Entity\EntityTest;

use Drupal\Tests\system\Kernel\Token\TokenReplaceKernelTestBase;

use PHPUnit\Framework\Attributes\Group;

use PHPUnit\Framework\Attributes\RunTestsInSeparateProcesses;

/**

 * Tests comment token replacement.

 */

#[Group('comment')]

#[RunTestsInSeparateProcesses]

class CommentTokenReplaceTest extends TokenReplaceKernelTestBase {

  use CommentTestTrait;

  /**

   * {@inheritdoc}

   */

  protected static $modules = ['comment', 'entity_test', 'filter'];

  /**

   * {@inheritdoc}

   */

  protected function setUp(): void {

    parent::setUp();

    $this->installEntitySchema('comment');

    $this->installEntitySchema('entity_test');

    $this->installSchema('comment', ['comment_entity_statistics']);

    $this->installConfig(['comment', 'filter']);

    $this->addDefaultCommentField('entity_test', 'entity_test', 'comment');

  }

  /**

   * Tests that the homepage token handles both NULL and set values.

   */

  public function testHomepageToken(): void {

    $account = $this->createUser();

    // Create a host entity.

    $entity = EntityTest::create(['name' => 'Test entity']);

    $entity->save();

    // Create a comment without setting a homepage.

    $comment = Comment::create([

      'subject' => 'Test comment',

      'uid' => $account->id(),

      'entity_type' => 'entity_test',

      'field_name' => 'comment',

      'entity_id' => $entity->id(),

      'comment_type' => 'comment',

      'status' => 1,

      'comment_body' => [

        'value' => 'This is the comment body.',

        'format' => 'plain_text',

      ],

    ]);

    $comment->save();

    // Verify that getHomepage() returns NULL when no homepage is set.

    $this->assertNull($comment->getHomepage());

    // Replace the homepage token. This should not produce any errors and

    // should return an empty string when the homepage is NULL.

    $output = $this->tokenService->replace('[comment:homepage]', ['comment' => $comment], ['langcode' => $this->interfaceLanguage->getId()]);

    $this->assertSame('', $output, 'Homepage token with NULL value returns empty string.');

    // Now set a homepage and verify the token returns the sanitized URL.

    $comment->setHomepage('http://example.org/');

    $comment->save();

    $output = $this->tokenService->replace('[comment:homepage]', ['comment' => $comment], ['langcode' => $this->interfaceLanguage->getId()]);

    $this->assertSame(UrlHelper::stripDangerousProtocols('http://example.org/'), $output, 'Homepage token returns sanitized URL.');

  }

}