Issue #3025394 by eyilmaz, vsujeetkumar, Kristen Pol, priyanka.sahni,...

    if (!isset($this->cid)) {

      $route_parameters = $this->routeMatch->getRawParameters()->all();

      ksort($route_parameters);

      return 'active-trail:route:' . $this->routeMatch->getRouteName() . ':route_parameters:' . serialize($route_parameters);

      $this->cid = 'active-trail:route:' . $this->routeMatch->getRouteName() . ':route_parameters:' . serialize($route_parameters);

    }

    return $this->cid;

<?php

namespace Drupal\FunctionalTests\Menu;

use Drupal\Core\Url;

use Drupal\menu_link_content\Entity\MenuLinkContent;

use Drupal\Tests\BrowserTestBase;

/**

 * Tests that 403 active trail behavior does not overwrite original entry.

 *

 * @group menu

 */

class MenuActiveTrail403Test extends BrowserTestBase {

  /**

   * {@inheritdoc}

   */

  protected $defaultTheme = 'stark';

  /**

   * A user who can access both routes in our menu.

   *

   * @var \Drupal\user\UserInterface

   */

  protected $privilegedUser;

  /**

   * The menu which active trail is tested.

   *

   * @var string

   */

  protected $menu = 'footer';

  /**

   * {@inheritdoc}

   */

  public static $modules = ['system', 'block', 'menu_link_content'];

  /**

   * {@inheritdoc}

   */

  protected function setUp(): void {

    parent::setUp();

    // Place the menu block, so menu trail gets built and cached. Showing the

    // menu starting from the second level, so it is only shown when the active

    // trail matches.

    $this->drupalPlaceBlock(

      'system_menu_block:' . $this->menu,

      [

       'level' => 2,

      ]

    );

    // Menu content, where the privileged user has access and the anonymous does

    // not have access. This route will be visited by both users. The privileged

    // user should see the menu with the menu content item created below.

    $parent_menu_link_content = MenuLinkContent::create([

      'title' => 'Admin overview',

      'menu_name' => 'footer',

      'link' => ['uri' => 'route:system.admin'],

    ]);

    $parent_menu_link_content->save();

    // Menu content for the second level, which should be shown in the menu for

    // the privileged user.

    $menu_link_content = MenuLinkContent::create([

      'title' => 'Link to Status page',

      'menu_name' => 'footer',

      'link' => ['uri' => 'route:system.status'],

      'parent' => 'menu_link_content:' . $parent_menu_link_content->uuid(),

    ]);

    $menu_link_content->save();

    $privileged_permissions = [

      'access administration pages',

      'administer site configuration',

    ];

    // Create a user who can access system.status and system.admin.

    $this->privilegedUser = $this->drupalCreateUser($privileged_permissions);

  }

  /**

   * Tests that visiting 403 page does not override original active trail.

   */

  public function testMenuActiveTrail403Cache() {

    $this->drupalLogin($this->privilegedUser);

    $system_status_url = Url::fromRoute('system.status');

    $this->drupalGet($system_status_url);

    // Check status code.

    $this->assertSession()->statusCodeEquals(200);

    // Check that our menu item to the status page is there.

    $this->assertSession()->pageTextContains('Link to Status page');

    $this->drupalLogout();

    // Visit the same page as anonymous.

    $this->drupalGet($system_status_url);

    // Check that the anonymous user gets a 403 page.

    $this->assertSession()->statusCodeEquals(403);

    // Visit the page again as privileged user. And check that the menu is still

    // printed.

    $this->drupalLogin($this->privilegedUser);

    $system_status_url = Url::fromRoute('system.status');

    $this->drupalGet($system_status_url);

    // Check status code.

    $this->assertSession()->statusCodeEquals(200);

    $this->assertSession()->pageTextContains('Link to Status page');

  }

}