diff --git a/core/modules/menu_ui/src/Tests/MenuLanguageTest.php b/core/modules/menu_ui/src/Tests/MenuLanguageTest.php
deleted file mode 100644
index 4c48f05..0000000
--- a/core/modules/menu_ui/src/Tests/MenuLanguageTest.php
+++ /dev/null
@@ -1,133 +0,0 @@
-<?php
-
-namespace Drupal\menu_ui\Tests;
-
-use Drupal\Component\Utility\Unicode;
-use Drupal\language\Entity\ConfigurableLanguage;
-use Drupal\language\Entity\ContentLanguageSettings;
-
-/**
- * Tests for menu_ui language settings.
- *
- * Create menu and menu links in non-English language, and edit language
- * settings.
- *
- * @group menu_ui
- */
-class MenuLanguageTest extends MenuWebTestBase {
-
-  /**
-   * Modules to enable.
-   *
-   * @var array
-   */
-  public static $modules = ['language'];
-
-  protected function setUp() {
-    parent::setUp();
-
-    $this->drupalLogin($this->drupalCreateUser(['access administration pages', 'administer menu']));
-
-    // Add some custom languages.
-    foreach (['aa', 'bb', 'cc', 'cs'] as $language_code) {
-      ConfigurableLanguage::create([
-        'id' => $language_code,
-        'label' => $this->randomMachineName(),
-      ])->save();
-    }
-  }
-
-  /**
-   * Tests menu language settings and the defaults for menu link items.
-   */
-  public function testMenuLanguage() {
-    // Create a test menu to test the various language-related settings.
-    // Machine name has to be lowercase.
-    $menu_name = Unicode::strtolower($this->randomMachineName(16));
-    $label = $this->randomString();
-    $edit = [
-      'id' => $menu_name,
-      'description' => '',
-      'label' => $label,
-      'langcode' => 'aa',
-    ];
-    $this->drupalPostForm('admin/structure/menu/add', $edit, t('Save'));
-    ContentLanguageSettings::loadByEntityTypeBundle('menu_link_content', 'menu_link_content')
-      ->setDefaultLangcode('bb')
-      ->setLanguageAlterable(TRUE)
-      ->save();
-
-    // Check menu language.
-    $this->assertOptionSelected('edit-langcode', $edit['langcode'], 'The menu language was correctly selected.');
-
-    // Test menu link language.
-    $link_path = '/';
-
-    // Add a menu link.
-    $link_title = $this->randomString();
-    $edit = [
-      'title[0][value]' => $link_title,
-      'link[0][uri]' => $link_path,
-    ];
-    $this->drupalPostForm("admin/structure/menu/manage/$menu_name/add", $edit, t('Save'));
-    // Check the link was added with the correct menu link default language.
-    $menu_links = entity_load_multiple_by_properties('menu_link_content', ['title' => $link_title]);
-    $menu_link = reset($menu_links);
-    $this->assertMenuLink($menu_link->getPluginId(), [
-      'menu_name' => $menu_name,
-      'route_name' => '<front>',
-      'langcode' => 'bb',
-    ]);
-
-    // Edit menu link default, changing it to cc.
-    ContentLanguageSettings::loadByEntityTypeBundle('menu_link_content', 'menu_link_content')
-      ->setDefaultLangcode('cc')
-      ->setLanguageAlterable(TRUE)
-      ->save();
-
-    // Add a menu link.
-    $link_title = $this->randomString();
-    $edit = [
-      'title[0][value]' => $link_title,
-      'link[0][uri]' => $link_path,
-    ];
-    $this->drupalPostForm("admin/structure/menu/manage/$menu_name/add", $edit, t('Save'));
-    // Check the link was added with the correct new menu link default language.
-    $menu_links = entity_load_multiple_by_properties('menu_link_content', ['title' => $link_title]);
-    $menu_link = reset($menu_links);
-    $this->assertMenuLink($menu_link->getPluginId(), [
-      'menu_name' => $menu_name,
-      'route_name' => '<front>',
-      'langcode' => 'cc',
-    ]);
-
-    // Now change the language of the new link to 'bb'.
-    $edit = [
-      'langcode[0][value]' => 'bb',
-    ];
-    $this->drupalPostForm('admin/structure/menu/item/' . $menu_link->id() . '/edit', $edit, t('Save'));
-    $this->assertMenuLink($menu_link->getPluginId(), [
-      'menu_name' => $menu_name,
-      'route_name' => '<front>',
-      'langcode' => 'bb',
-    ]);
-
-    // Saving menu link items ends up on the edit menu page. To check the menu
-    // link has the correct language default on edit, go to the menu link edit
-    // page first.
-    $this->drupalGet('admin/structure/menu/item/' . $menu_link->id() . '/edit');
-    // Check that the language selector has the correct default value.
-    $this->assertOptionSelected('edit-langcode-0-value', 'bb', 'The menu link language was correctly selected.');
-
-    // Edit menu to hide the language select on menu link item add.
-    ContentLanguageSettings::loadByEntityTypeBundle('menu_link_content', 'menu_link_content')
-      ->setDefaultLangcode('cc')
-      ->setLanguageAlterable(FALSE)
-      ->save();
-
-    // Check that the language selector is not available on menu link add page.
-    $this->drupalGet("admin/structure/menu/manage/$menu_name/add");
-    $this->assertNoField('edit-langcode-0-value', 'The language selector field was hidden the page');
-  }
-
-}
diff --git a/core/modules/menu_ui/src/Tests/MenuNodeTest.php b/core/modules/menu_ui/src/Tests/MenuNodeTest.php
deleted file mode 100644
index 3f1bba0..0000000
--- a/core/modules/menu_ui/src/Tests/MenuNodeTest.php
+++ /dev/null
@@ -1,341 +0,0 @@
-<?php
-
-namespace Drupal\menu_ui\Tests;
-
-use Drupal\simpletest\WebTestBase;
-use Drupal\language\Entity\ConfigurableLanguage;
-use Drupal\menu_link_content\Entity\MenuLinkContent;
-use Drupal\node\Entity\Node;
-
-/**
- * Add, edit, and delete a node with menu link.
- *
- * @group menu_ui
- */
-class MenuNodeTest extends WebTestBase {
-
-  /**
-   * An editor user.
-   *
-   * @var \Drupal\user\UserInterface
-   */
-  protected $editor;
-
-  /**
-   * Modules to enable.
-   *
-   * @var array
-   */
-  public static $modules = ['menu_ui', 'test_page_test', 'node', 'block', 'locale', 'language', 'content_translation'];
-
-  protected function setUp() {
-    parent::setUp();
-
-    $this->drupalPlaceBlock('system_menu_block:main');
-    $this->drupalPlaceBlock('page_title_block');
-
-    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
-
-    $this->editor = $this->drupalCreateUser([
-      'access administration pages',
-      'administer content types',
-      'administer menu',
-      'create page content',
-      'edit any page content',
-      'delete any page content',
-      'create content translations',
-      'update content translations',
-      'delete content translations',
-      'translate any entity',
-    ]);
-    $this->drupalLogin($this->editor);
-  }
-
-  /**
-   * Test creating, editing, deleting menu links via node form widget.
-   */
-  public function testMenuNodeFormWidget() {
-    // Verify that cacheability metadata is bubbled from the menu link tree
-    // access checking that is performed when determining the "default parent
-    // item" options in menu_ui_form_node_type_form_alter(). The "log out" link
-    // adds the "user.roles:authenticated" cache context.
-    $this->drupalGet('admin/structure/types/manage/page');
-    $this->assertCacheContext('user.roles:authenticated');
-
-    // Verify that the menu link title has the correct maxlength.
-    $max_length = \Drupal::entityManager()->getBaseFieldDefinitions('menu_link_content')['title']->getSetting('max_length');
-    $this->drupalGet('node/add/page');
-    $this->assertPattern('/<input .* id="edit-menu-title" .* maxlength="' . $max_length . '" .* \/>/', 'Menu link title field has correct maxlength in node add form.');
-
-    // Disable the default main menu, so that no menus are enabled.
-    $edit = [
-      'menu_options[main]' => FALSE,
-    ];
-    $this->drupalPostForm('admin/structure/types/manage/page', $edit, t('Save content type'));
-
-    // Verify that no menu settings are displayed and nodes can be created.
-    $this->drupalGet('node/add/page');
-    $this->assertText(t('Create Basic page'));
-    $this->assertNoText(t('Menu settings'));
-    $node_title = $this->randomMachineName();
-    $edit = [
-      'title[0][value]' => $node_title,
-      'body[0][value]' => $this->randomString(),
-    ];
-    $this->drupalPostForm(NULL, $edit, t('Save'));
-    $node = $this->drupalGetNodeByTitle($node_title);
-    $this->assertEqual($node->getTitle(), $edit['title[0][value]']);
-
-    // Test that we cannot set a menu item from a menu that is not set as
-    // available.
-    $edit = [
-      'menu_options[tools]' => 1,
-      'menu_parent' => 'main:',
-    ];
-    $this->drupalPostForm('admin/structure/types/manage/page', $edit, t('Save content type'));
-    $this->assertText(t('The selected menu item is not under one of the selected menus.'));
-    $this->assertNoRaw(t('The content type %name has been updated.', ['%name' => 'Basic page']));
-
-    // Enable Tools menu as available menu.
-    $edit = [
-      'menu_options[main]' => 1,
-      'menu_options[tools]' => 1,
-      'menu_parent' => 'main:',
-    ];
-    $this->drupalPostForm('admin/structure/types/manage/page', $edit, t('Save content type'));
-    $this->assertRaw(t('The content type %name has been updated.', ['%name' => 'Basic page']));
-
-    // Test that we can preview a node that will create a menu item.
-    $edit = [
-      'title[0][value]' => $node_title,
-      'menu[enabled]' => 1,
-      'menu[title]' => 'Test preview',
-    ];
-    $this->drupalPostForm('node/add/page', $edit, t('Preview'));
-
-    // Create a node.
-    $node_title = $this->randomMachineName();
-    $edit = [
-      'title[0][value]' => $node_title,
-      'body[0][value]' => $this->randomString(),
-    ];
-    $this->drupalPostForm('node/add/page', $edit, t('Save'));
-    $node = $this->drupalGetNodeByTitle($node_title);
-    // Assert that there is no link for the node.
-    $this->drupalGet('test-page');
-    $this->assertNoLink($node_title);
-
-    // Edit the node, enable the menu link setting, but skip the link title.
-    $edit = [
-      'menu[enabled]' => 1,
-    ];
-    $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
-    // Assert that there is no link for the node.
-    $this->drupalGet('test-page');
-    $this->assertNoLink($node_title);
-
-    // Use not only the save button, but also the two special buttons:
-    // 'Save and publish' as well as 'Save and keep published'.
-    // These buttons just appear for 'administer nodes' users.
-    $admin_user = $this->drupalCreateUser([
-      'access administration pages',
-      'administer content types',
-      'administer nodes',
-      'administer menu',
-      'create page content',
-      'edit any page content',
-    ]);
-    $this->drupalLogin($admin_user);
-    foreach (['Save and unpublish' => FALSE, 'Save and keep unpublished' => FALSE, 'Save and publish' => TRUE, 'Save and keep published' => TRUE] as $submit => $visible) {
-      $edit = [
-        'menu[enabled]' => 1,
-        'menu[title]' => $node_title,
-      ];
-      $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, $submit);
-      // Assert that the link exists.
-      $this->drupalGet('test-page');
-      if ($visible) {
-        $this->assertLink($node_title, 0, 'Found a menu link after submitted with ' . $submit);
-      }
-      else {
-        $this->assertNoLink($node_title, 'Found no menu link after submitted with ' . $submit);
-      }
-    }
-
-    // Log back in as normal user.
-    $this->drupalLogin($this->editor);
-    // Edit the node and create a menu link.
-    $edit = [
-      'menu[enabled]' => 1,
-      'menu[title]' => $node_title,
-      'menu[weight]' => 17,
-    ];
-    $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
-    // Assert that the link exists.
-    $this->drupalGet('test-page');
-    $this->assertLink($node_title);
-
-    $this->drupalGet('node/' . $node->id() . '/edit');
-    $this->assertFieldById('edit-menu-weight', 17, 'Menu weight correct in edit form');
-    $this->assertPattern('/<input .* id="edit-menu-title" .* maxlength="' . $max_length . '" .* \/>/', 'Menu link title field has correct maxlength in node edit form.');
-
-    // Disable the menu link, then edit the node--the link should stay disabled.
-    $link_id = menu_ui_get_menu_link_defaults($node)['entity_id'];
-    /** @var \Drupal\menu_link_content\Entity\MenuLinkContent $link */
-    $link = MenuLinkContent::load($link_id);
-    $link->set('enabled', FALSE);
-    $link->save();
-    $this->drupalPostForm($node->urlInfo('edit-form'), $edit, t('Save'));
-    $link = MenuLinkContent::load($link_id);
-    $this->assertFalse($link->isEnabled(), 'Saving a node with a disabled menu link keeps the menu link disabled.');
-
-    // Edit the node and remove the menu link.
-    $edit = [
-      'menu[enabled]' => FALSE,
-    ];
-    $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
-    // Assert that there is no link for the node.
-    $this->drupalGet('test-page');
-    $this->assertNoLink($node_title);
-
-    // Add a menu link to the Administration menu.
-    $item = MenuLinkContent::create([
-      'link' => [['uri' => 'entity:node/' . $node->id()]],
-      'title' => $this->randomMachineName(16),
-      'menu_name' => 'admin',
-    ]);
-    $item->save();
-
-    // Assert that disabled Administration menu is not shown on the
-    // node/$nid/edit page.
-    $this->drupalGet('node/' . $node->id() . '/edit');
-    $this->assertText('Provide a menu link', 'Link in not allowed menu not shown in node edit form');
-    // Assert that the link is still in the Administration menu after save.
-    $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
-    $link = MenuLinkContent::load($item->id());
-    $this->assertTrue($link, 'Link in not allowed menu still exists after saving node');
-
-    // Move the menu link back to the Tools menu.
-    $item->menu_name->value = 'tools';
-    $item->save();
-    // Create a second node.
-    $child_node = $this->drupalCreateNode(['type' => 'article']);
-    // Assign a menu link to the second node, being a child of the first one.
-    $child_item = MenuLinkContent::create([
-      'link' => [['uri' => 'entity:node/' . $child_node->id()]],
-      'title' => $this->randomMachineName(16),
-      'parent' => $item->getPluginId(),
-      'menu_name' => $item->getMenuName(),
-    ]);
-    $child_item->save();
-    // Edit the first node.
-    $this->drupalGet('node/' . $node->id() . '/edit');
-    // Assert that it is not possible to set the parent of the first node to itself or the second node.
-    $this->assertNoOption('edit-menu-menu-parent', 'tools:' . $item->getPluginId());
-    $this->assertNoOption('edit-menu-menu-parent', 'tools:' . $child_item->getPluginId());
-    // Assert that unallowed Administration menu is not available in options.
-    $this->assertNoOption('edit-menu-menu-parent', 'admin:');
-  }
-
-  /**
-   * Testing correct loading and saving of menu links via node form widget in a multilingual environment.
-   */
-  public function testMultilingualMenuNodeFormWidget() {
-    // Setup languages.
-    $langcodes = ['de'];
-    foreach ($langcodes as $langcode) {
-      ConfigurableLanguage::createFromLangcode($langcode)->save();
-    }
-    array_unshift($langcodes, \Drupal::languageManager()->getDefaultLanguage()->getId());
-
-    $config = \Drupal::service('config.factory')->getEditable('language.negotiation');
-    // Ensure path prefix is used to determine the language.
-    $config->set('url.source', 'path_prefix');
-    // Ensure that there's a path prefix set for english as well.
-    $config->set('url.prefixes.' . $langcodes[0], $langcodes[0]);
-    $config->save();
-
-    $this->rebuildContainer();
-
-    $languages = [];
-    foreach ($langcodes as $langcode) {
-      $languages[$langcode] = ConfigurableLanguage::load($langcode);
-    }
-
-    // Use a UI form submission to make the node type and menu link content entity translatable.
-    $this->drupalLogout();
-    $this->drupalLogin($this->rootUser);
-    $edit = [
-      'entity_types[node]' => TRUE,
-      'entity_types[menu_link_content]' => TRUE,
-      'settings[node][page][settings][language][language_alterable]' => TRUE,
-      'settings[node][page][translatable]' => TRUE,
-      'settings[node][page][fields][title]' => TRUE,
-      'settings[menu_link_content][menu_link_content][translatable]' => TRUE,
-    ];
-    $this->drupalPostForm('admin/config/regional/content-language', $edit, t('Save configuration'));
-
-    // Log out and back in as normal user.
-    $this->drupalLogout();
-    $this->drupalLogin($this->editor);
-
-    // Create a node.
-    $node_title = $this->randomMachineName(8);
-    $node = Node::create([
-      'type' => 'page',
-      'title' => $node_title,
-      'body' => $this->randomMachineName(16),
-      'uid' => $this->editor->id(),
-      'status' => 1,
-      'langcode' => $langcodes[0],
-    ]);
-    $node->save();
-
-    // Create translation.
-    $translated_node_title = $this->randomMachineName(8);
-    $node->addTranslation($langcodes[1], ['title' => $translated_node_title, 'body' => $this->randomMachineName(16), 'status' => 1]);
-    $node->save();
-
-    // Edit the node and create a menu link.
-    $edit = [
-      'menu[enabled]' => 1,
-      'menu[title]' => $node_title,
-      'menu[weight]' => 17,
-    ];
-    $options = ['language' => $languages[$langcodes[0]]];
-    $url = $node->toUrl('edit-form', $options);
-    $this->drupalPostForm($url, $edit, t('Save') . ' ' . t('(this translation)'));
-
-    // Edit the node in a different language and translate the menu link.
-    $edit = [
-      'menu[enabled]' => 1,
-      'menu[title]' => $translated_node_title,
-      'menu[weight]' => 17,
-    ];
-    $options = ['language' => $languages[$langcodes[1]]];
-    $url = $node->toUrl('edit-form', $options);
-    $this->drupalPostForm($url, $edit, t('Save') . ' ' . t('(this translation)'));
-
-    // Assert that the original link exists in the frontend.
-    $this->drupalGet('node/' . $node->id(), ['language' => $languages[$langcodes[0]]]);
-    $this->assertLink($node_title);
-
-    // Assert that the translated link exists in the frontend.
-    $this->drupalGet('node/' . $node->id(), ['language' => $languages[$langcodes[1]]]);
-    $this->assertLink($translated_node_title);
-
-    // Revisit the edit page in original language, check the loaded menu item title and save.
-    $options = ['language' => $languages[$langcodes[0]]];
-    $url = $node->toUrl('edit-form', $options);
-    $this->drupalGet($url);
-    $this->assertFieldById('edit-menu-title', $node_title);
-    $this->drupalPostForm(NULL, [], t('Save') . ' ' . t('(this translation)'));
-
-    // Revisit the edit page of the translation and check the loaded menu item title.
-    $options = ['language' => $languages[$langcodes[1]]];
-    $url = $node->toUrl('edit-form', $options);
-    $this->drupalGet($url);
-    $this->assertFieldById('edit-menu-title', $translated_node_title);
-  }
-
-}
diff --git a/core/modules/menu_ui/src/Tests/MenuTest.php b/core/modules/menu_ui/src/Tests/MenuTest.php
deleted file mode 100644
index dde9502..0000000
--- a/core/modules/menu_ui/src/Tests/MenuTest.php
+++ /dev/null
@@ -1,962 +0,0 @@
-<?php
-
-namespace Drupal\menu_ui\Tests;
-
-use Drupal\block\Entity\Block;
-use Drupal\Component\Serialization\Json;
-use Drupal\Component\Utility\Unicode;
-use Drupal\Core\Menu\MenuLinkInterface;
-use Drupal\Core\Url;
-use Drupal\menu_link_content\Entity\MenuLinkContent;
-use Drupal\system\Entity\Menu;
-use Drupal\node\Entity\Node;
-use Drupal\node\NodeInterface;
-
-/**
- * Add a custom menu, add menu links to the custom menu and Tools menu, check
- * their data, and delete them using the UI.
- *
- * @group menu_ui
- */
-class MenuTest extends MenuWebTestBase {
-
-  /**
-   * Modules to enable.
-   *
-   * @var array
-   */
-  public static $modules = ['node', 'block', 'contextual', 'help', 'path', 'test_page_test'];
-
-  /**
-   * A user with administration rights.
-   *
-   * @var \Drupal\user\UserInterface
-   */
-  protected $adminUser;
-
-  /**
-   * An authenticated user.
-   *
-   * @var \Drupal\user\UserInterface
-   */
-  protected $authenticatedUser;
-
-  /**
-   * Array of placed menu blocks keyed by block ID.
-   *
-   * @var array
-   */
-  protected $blockPlacements;
-
-  /**
-   * A test menu.
-   *
-   * @var \Drupal\system\Entity\Menu
-   */
-  protected $menu;
-
-  /**
-   * An array of test menu links.
-   *
-   * @var \Drupal\menu_link_content\MenuLinkContentInterface[]
-   */
-  protected $items;
-
-  protected function setUp() {
-    parent::setUp();
-
-    $this->drupalPlaceBlock('page_title_block');
-
-    $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
-
-    // Create users.
-    $this->adminUser = $this->drupalCreateUser(['access administration pages', 'administer blocks', 'administer menu', 'create article content']);
-    $this->authenticatedUser = $this->drupalCreateUser([]);
-  }
-
-  /**
-   * Tests menu functionality using the admin and user interfaces.
-   */
-  public function testMenu() {
-    // Log in the user.
-    $this->drupalLogin($this->adminUser);
-    $this->items = [];
-
-    $this->menu = $this->addCustomMenu();
-    $this->doMenuTests();
-    $this->doTestMenuBlock();
-    $this->addInvalidMenuLink();
-    $this->addCustomMenuCRUD();
-
-    // Verify that the menu links rebuild is idempotent and leaves the same
-    // number of links in the table.
-    /** @var \Drupal\Core\Menu\MenuLinkManagerInterface $menu_link_manager */
-    $menu_link_manager = \Drupal::service('plugin.manager.menu.link');
-    $before_count = $menu_link_manager->countMenuLinks(NULL);
-    $menu_link_manager->rebuild();
-    $after_count = $menu_link_manager->countMenuLinks(NULL);
-    $this->assertIdentical($before_count, $after_count, 'MenuLinkManager::rebuild() does not add more links');
-    // Do standard user tests.
-    // Log in the user.
-    $this->drupalLogin($this->authenticatedUser);
-    $this->verifyAccess(403);
-
-    foreach ($this->items as $item) {
-      // Menu link URIs are stored as 'internal:/node/$nid'.
-      $node = Node::load(str_replace('internal:/node/', '', $item->link->uri));
-      $this->verifyMenuLink($item, $node);
-    }
-
-    // Log in the administrator.
-    $this->drupalLogin($this->adminUser);
-
-    // Verify delete link exists and reset link does not exist.
-    $this->drupalGet('admin/structure/menu/manage/' . $this->menu->id());
-    $this->assertLinkByHref(Url::fromRoute('entity.menu_link_content.delete_form', ['menu_link_content' => $this->items[0]->id()])->toString());
-    $this->assertNoLinkByHref(Url::fromRoute('menu_ui.link_reset', ['menu_link_plugin' => $this->items[0]->getPluginId()])->toString());
-    // Check delete and reset access.
-    $this->drupalGet('admin/structure/menu/item/' . $this->items[0]->id() . '/delete');
-    $this->assertResponse(200);
-    $this->drupalGet('admin/structure/menu/link/' . $this->items[0]->getPluginId() . '/reset');
-    $this->assertResponse(403);
-
-    // Delete menu links.
-    foreach ($this->items as $item) {
-      $this->deleteMenuLink($item);
-    }
-
-    // Delete custom menu.
-    $this->deleteCustomMenu();
-
-    // Modify and reset a standard menu link.
-    $instance = $this->getStandardMenuLink();
-    $old_weight = $instance->getWeight();
-    // Edit the static menu link.
-    $edit = [];
-    $edit['weight'] = 10;
-    $id = $instance->getPluginId();
-    $this->drupalPostForm("admin/structure/menu/link/$id/edit", $edit, t('Save'));
-    $this->assertResponse(200);
-    $this->assertText('The menu link has been saved.');
-    $menu_link_manager->resetDefinitions();
-
-    $instance = $menu_link_manager->createInstance($instance->getPluginId());
-    $this->assertEqual($edit['weight'], $instance->getWeight(), 'Saving an existing link updates the weight.');
-    $this->resetMenuLink($instance, $old_weight);
-  }
-
-  /**
-   * Adds a custom menu using CRUD functions.
-   */
-  public function addCustomMenuCRUD() {
-    // Add a new custom menu.
-    $menu_name = substr(hash('sha256', $this->randomMachineName(16)), 0, MENU_MAX_MENU_NAME_LENGTH_UI);
-    $label = $this->randomMachineName(16);
-
-    $menu = Menu::create([
-      'id' => $menu_name,
-      'label' => $label,
-      'description' => 'Description text',
-    ]);
-    $menu->save();
-
-    // Assert the new menu.
-    $this->drupalGet('admin/structure/menu/manage/' . $menu_name);
-    $this->assertRaw($label, 'Custom menu was added.');
-
-    // Edit the menu.
-    $new_label = $this->randomMachineName(16);
-    $menu->set('label', $new_label);
-    $menu->save();
-    $this->drupalGet('admin/structure/menu/manage/' . $menu_name);
-    $this->assertRaw($new_label, 'Custom menu was edited.');
-  }
-
-  /**
-   * Creates a custom menu.
-   *
-   * @return \Drupal\system\Entity\Menu
-   *   The custom menu that has been created.
-   */
-  public function addCustomMenu() {
-    // Try adding a menu using a menu_name that is too long.
-    $this->drupalGet('admin/structure/menu/add');
-    $menu_name = substr(hash('sha256', $this->randomMachineName(16)), 0, MENU_MAX_MENU_NAME_LENGTH_UI + 1);
-    $label = $this->randomMachineName(16);
-    $edit = [
-      'id' => $menu_name,
-      'description' => '',
-      'label' => $label,
-    ];
-    $this->drupalPostForm('admin/structure/menu/add', $edit, t('Save'));
-
-    // Verify that using a menu_name that is too long results in a validation
-    // message.
-    $this->assertRaw(t('@name cannot be longer than %max characters but is currently %length characters long.', [
-      '@name' => t('Menu name'),
-      '%max' => MENU_MAX_MENU_NAME_LENGTH_UI,
-      '%length' => Unicode::strlen($menu_name),
-    ]));
-
-    // Change the menu_name so it no longer exceeds the maximum length.
-    $menu_name = substr(hash('sha256', $this->randomMachineName(16)), 0, MENU_MAX_MENU_NAME_LENGTH_UI);
-    $edit['id'] = $menu_name;
-    $this->drupalPostForm('admin/structure/menu/add', $edit, t('Save'));
-
-    // Verify that no validation error is given for menu_name length.
-    $this->assertNoRaw(t('@name cannot be longer than %max characters but is currently %length characters long.', [
-      '@name' => t('Menu name'),
-      '%max' => MENU_MAX_MENU_NAME_LENGTH_UI,
-      '%length' => Unicode::strlen($menu_name),
-    ]));
-    // Verify that the confirmation message is displayed.
-    $this->assertRaw(t('Menu %label has been added.', ['%label' => $label]));
-    $this->drupalGet('admin/structure/menu');
-    $this->assertText($label, 'Menu created');
-
-    // Confirm that the custom menu block is available.
-    $this->drupalGet('admin/structure/block/list/' . $this->config('system.theme')->get('default'));
-    $this->clickLinkPartialName('Place block');
-    $this->assertText($label);
-
-    // Enable the block.
-    $block = $this->drupalPlaceBlock('system_menu_block:' . $menu_name);
-    $this->blockPlacements[$menu_name] = $block->id();
-    return Menu::load($menu_name);
-  }
-
-  /**
-   * Deletes the locally stored custom menu.
-   *
-   * This deletes the custom menu that is stored in $this->menu and performs
-   * tests on the menu delete user interface.
-   */
-  public function deleteCustomMenu() {
-    $menu_name = $this->menu->id();
-    $label = $this->menu->label();
-
-    // Delete custom menu.
-    $this->drupalPostForm("admin/structure/menu/manage/$menu_name/delete", [], t('Delete'));
-    $this->assertResponse(200);
-    $this->assertRaw(t('The menu %title has been deleted.', ['%title' => $label]), 'Custom menu was deleted');
-    $this->assertNull(Menu::load($menu_name), 'Custom menu was deleted');
-    // Test if all menu links associated with the menu were removed from
-    // database.
-    $result = entity_load_multiple_by_properties('menu_link_content', ['menu_name' => $menu_name]);
-    $this->assertFalse($result, 'All menu links associated with the custom menu were deleted.');
-
-    // Make sure there's no delete button on system menus.
-    $this->drupalGet('admin/structure/menu/manage/main');
-    $this->assertNoRaw('edit-delete', 'The delete button was not found');
-
-    // Try to delete the main menu.
-    $this->drupalGet('admin/structure/menu/manage/main/delete');
-    $this->assertText(t('You are not authorized to access this page.'));
-  }
-
-  /**
-   * Tests menu functionality.
-   */
-  public function doMenuTests() {
-    $menu_name = $this->menu->id();
-
-    // Test the 'Add link' local action.
-    $this->drupalGet(Url::fromRoute('entity.menu.edit_form', ['menu' => $menu_name]));
-
-    $this->clickLink(t('Add link'));
-    $link_title = $this->randomString();
-    $this->drupalPostForm(NULL, ['link[0][uri]' => '/', 'title[0][value]' => $link_title], t('Save'));
-    $this->assertUrl(Url::fromRoute('entity.menu.edit_form', ['menu' => $menu_name]));
-    // Test the 'Edit' operation.
-    $this->clickLink(t('Edit'));
-    $this->assertFieldByName('title[0][value]', $link_title);
-    $link_title = $this->randomString();
-    $this->drupalPostForm(NULL, ['title[0][value]' => $link_title], t('Save'));
-    $this->assertUrl(Url::fromRoute('entity.menu.edit_form', ['menu' => $menu_name]));
-    // Test the 'Delete' operation.
-    $this->clickLink(t('Delete'));
-    $this->assertRaw(t('Are you sure you want to delete the custom menu link %item?', ['%item' => $link_title]));
-    $this->drupalPostForm(NULL, [], t('Delete'));
-    $this->assertUrl(Url::fromRoute('entity.menu.edit_form', ['menu' => $menu_name]));
-
-    // Add nodes to use as links for menu links.
-    $node1 = $this->drupalCreateNode(['type' => 'article']);
-    $node2 = $this->drupalCreateNode(['type' => 'article']);
-    $node3 = $this->drupalCreateNode(['type' => 'article']);
-    $node4 = $this->drupalCreateNode(['type' => 'article']);
-    // Create a node with an alias.
-    $node5 = $this->drupalCreateNode([
-      'type' => 'article',
-      'path' => [
-        'alias' => '/node5',
-      ],
-    ]);
-
-    // Verify add link button.
-    $this->drupalGet('admin/structure/menu');
-    $this->assertLinkByHref('admin/structure/menu/manage/' . $menu_name . '/add', 0, "The add menu link button URL is correct");
-
-    // Verify form defaults.
-    $this->doMenuLinkFormDefaultsTest();
-
-    // Add menu links.
-    $item1 = $this->addMenuLink('', '/node/' . $node1->id(), $menu_name, TRUE);
-    $item2 = $this->addMenuLink($item1->getPluginId(), '/node/' . $node2->id(), $menu_name, FALSE);
-    $item3 = $this->addMenuLink($item2->getPluginId(), '/node/' . $node3->id(), $menu_name);
-
-    // Hierarchy
-    // <$menu_name>
-    // - item1
-    // -- item2
-    // --- item3
-
-    $this->assertMenuLink($item1->getPluginId(), [
-      'children' => [$item2->getPluginId(), $item3->getPluginId()],
-      'parents' => [$item1->getPluginId()],
-      // We assert the language code here to make sure that the language
-      // selection element degrades gracefully without the Language module.
-      'langcode' => 'en',
-    ]);
-    $this->assertMenuLink($item2->getPluginId(), [
-      'children' => [$item3->getPluginId()],
-      'parents' => [$item2->getPluginId(), $item1->getPluginId()],
-      // See above.
-      'langcode' => 'en',
-    ]);
-    $this->assertMenuLink($item3->getPluginId(), [
-      'children' => [],
-      'parents' => [$item3->getPluginId(), $item2->getPluginId(), $item1->getPluginId()],
-      // See above.
-      'langcode' => 'en',
-    ]);
-
-    // Verify menu links.
-    $this->verifyMenuLink($item1, $node1);
-    $this->verifyMenuLink($item2, $node2, $item1, $node1);
-    $this->verifyMenuLink($item3, $node3, $item2, $node2);
-
-    // Add more menu links.
-    $item4 = $this->addMenuLink('', '/node/' . $node4->id(), $menu_name);
-    $item5 = $this->addMenuLink($item4->getPluginId(), '/node/' . $node5->id(), $menu_name);
-    // Create a menu link pointing to an alias.
-    $item6 = $this->addMenuLink($item4->getPluginId(), '/node5', $menu_name, TRUE, '0');
-
-    // Hierarchy
-    // <$menu_name>
-    // - item1
-    // -- item2
-    // --- item3
-    // - item4
-    // -- item5
-    // -- item6
-
-    $this->assertMenuLink($item4->getPluginId(), [
-      'children' => [$item5->getPluginId(), $item6->getPluginId()],
-      'parents' => [$item4->getPluginId()],
-      // See above.
-      'langcode' => 'en',
-    ]);
-    $this->assertMenuLink($item5->getPluginId(), [
-      'children' => [],
-      'parents' => [$item5->getPluginId(), $item4->getPluginId()],
-      'langcode' => 'en',
-    ]);
-    $this->assertMenuLink($item6->getPluginId(), [
-      'children' => [],
-      'parents' => [$item6->getPluginId(), $item4->getPluginId()],
-      'route_name' => 'entity.node.canonical',
-      'route_parameters' => ['node' => $node5->id()],
-      'url' => '',
-      // See above.
-      'langcode' => 'en',
-    ]);
-
-    // Modify menu links.
-    $this->modifyMenuLink($item1);
-    $this->modifyMenuLink($item2);
-
-    // Toggle menu links.
-    $this->toggleMenuLink($item1);
-    $this->toggleMenuLink($item2);
-
-    // Move link and verify that descendants are updated.
-    $this->moveMenuLink($item2, $item5->getPluginId(), $menu_name);
-    // Hierarchy
-    // <$menu_name>
-    // - item1
-    // - item4
-    // -- item5
-    // --- item2
-    // ---- item3
-    // -- item6
-
-    $this->assertMenuLink($item1->getPluginId(), [
-      'children' => [],
-      'parents' => [$item1->getPluginId()],
-      // See above.
-      'langcode' => 'en',
-    ]);
-    $this->assertMenuLink($item4->getPluginId(), [
-      'children' => [$item5->getPluginId(), $item6->getPluginId(), $item2->getPluginId(), $item3->getPluginId()],
-      'parents' => [$item4->getPluginId()],
-      // See above.
-      'langcode' => 'en',
-    ]);
-
-    $this->assertMenuLink($item5->getPluginId(), [
-      'children' => [$item2->getPluginId(), $item3->getPluginId()],
-      'parents' => [$item5->getPluginId(), $item4->getPluginId()],
-      // See above.
-      'langcode' => 'en',
-    ]);
-    $this->assertMenuLink($item2->getPluginId(), [
-      'children' => [$item3->getPluginId()],
-      'parents' => [$item2->getPluginId(), $item5->getPluginId(), $item4->getPluginId()],
-      // See above.
-      'langcode' => 'en',
-    ]);
-    $this->assertMenuLink($item3->getPluginId(), [
-      'children' => [],
-      'parents' => [$item3->getPluginId(), $item2->getPluginId(), $item5->getPluginId(), $item4->getPluginId()],
-      // See above.
-      'langcode' => 'en',
-    ]);
-
-    // Add 102 menu links with increasing weights, then make sure the last-added
-    // item's weight doesn't get changed because of the old hardcoded delta=50.
-    $items = [];
-    for ($i = -50; $i <= 51; $i++) {
-      $items[$i] = $this->addMenuLink('', '/node/' . $node1->id(), $menu_name, TRUE, strval($i));
-    }
-    $this->assertMenuLink($items[51]->getPluginId(), ['weight' => '51']);
-
-    // Disable a link and then re-enable the link via the overview form.
-    $this->disableMenuLink($item1);
-    $edit = [];
-    $edit['links[menu_plugin_id:' . $item1->getPluginId() . '][enabled]'] = TRUE;
-    $this->drupalPostForm('admin/structure/menu/manage/' . $item1->getMenuName(), $edit, t('Save'));
-
-    // Mark item2, item4 and item5 as expanded.
-    // This is done in order to show them on the frontpage.
-    $item2->expanded->value = 1;
-    $item2->save();
-    $item4->expanded->value = 1;
-    $item4->save();
-    $item5->expanded->value = 1;
-    $item5->save();
-
-    // Verify in the database.
-    $this->assertMenuLink($item1->getPluginId(), ['enabled' => 1]);
-
-    // Add an external link.
-    $item7 = $this->addMenuLink('', 'https://www.drupal.org', $menu_name);
-    $this->assertMenuLink($item7->getPluginId(), ['url' => 'https://www.drupal.org']);
-
-    // Add <front> menu item.
-    $item8 = $this->addMenuLink('', '/', $menu_name);
-    $this->assertMenuLink($item8->getPluginId(), ['route_name' => '<front>']);
-    $this->drupalGet('');
-    $this->assertResponse(200);
-    // Make sure we get routed correctly.
-    $this->clickLink($item8->getTitle());
-    $this->assertResponse(200);
-
-    // Check invalid menu link parents.
-    $this->checkInvalidParentMenuLinks();
-
-    // Save menu links for later tests.
-    $this->items[] = $item1;
-    $this->items[] = $item2;
-  }
-
-  /**
-   * Ensures that the proper default values are set when adding a menu link
-   */
-  protected function doMenuLinkFormDefaultsTest() {
-    $this->drupalGet("admin/structure/menu/manage/tools/add");
-    $this->assertResponse(200);
-
-    $this->assertFieldByName('title[0][value]', '');
-    $this->assertFieldByName('link[0][uri]', '');
-
-    $this->assertNoFieldChecked('edit-expanded-value');
-    $this->assertFieldChecked('edit-enabled-value');
-
-    $this->assertFieldByName('description[0][value]', '');
-    $this->assertFieldByName('weight[0][value]', 0);
-  }
-
-  /**
-   * Adds and removes a menu link with a query string and fragment.
-   */
-  public function testMenuQueryAndFragment() {
-    $this->drupalLogin($this->adminUser);
-
-    // Make a path with query and fragment on.
-    $path = '/test-page?arg1=value1&arg2=value2';
-    $item = $this->addMenuLink('', $path);
-
-    $this->drupalGet('admin/structure/menu/item/' . $item->id() . '/edit');
-    $this->assertFieldByName('link[0][uri]', $path, 'Path is found with both query and fragment.');
-
-    // Now change the path to something without query and fragment.
-    $path = '/test-page';
-    $this->drupalPostForm('admin/structure/menu/item/' . $item->id() . '/edit', ['link[0][uri]' => $path], t('Save'));
-    $this->drupalGet('admin/structure/menu/item/' . $item->id() . '/edit');
-    $this->assertFieldByName('link[0][uri]', $path, 'Path no longer has query or fragment.');
-
-    // Use <front>#fragment and ensure that saving it does not lose its content.
-    $path = '<front>?arg1=value#fragment';
-    $item = $this->addMenuLink('', $path);
-
-    $this->drupalGet('admin/structure/menu/item/' . $item->id() . '/edit');
-    $this->assertFieldByName('link[0][uri]', $path, 'Path is found with both query and fragment.');
-
-    $this->drupalPostForm('admin/structure/menu/item/' . $item->id() . '/edit', [], t('Save'));
-
-    $this->drupalGet('admin/structure/menu/item/' . $item->id() . '/edit');
-    $this->assertFieldByName('link[0][uri]', $path, 'Path is found with both query and fragment.');
-  }
-
-  /**
-   * Tests renaming the built-in menu.
-   */
-  public function testSystemMenuRename() {
-    $this->drupalLogin($this->adminUser);
-    $edit = [
-      'label' => $this->randomMachineName(16),
-    ];
-    $this->drupalPostForm('admin/structure/menu/manage/main', $edit, t('Save'));
-
-    // Make sure menu shows up with new name in block addition.
-    $default_theme = $this->config('system.theme')->get('default');
-    $this->drupalget('admin/structure/block/list/' . $default_theme);
-    $this->clickLinkPartialName('Place block');
-    $this->assertText($edit['label']);
-  }
-
-  /**
-   * Tests that menu items pointing to unpublished nodes are editable.
-   */
-  public function testUnpublishedNodeMenuItem() {
-    $this->drupalLogin($this->drupalCreateUser(['access administration pages', 'administer blocks', 'administer menu', 'create article content', 'bypass node access']));
-    // Create an unpublished node.
-    $node = $this->drupalCreateNode([
-      'type' => 'article',
-      'status' => NodeInterface::NOT_PUBLISHED,
-    ]);
-
-    $item = $this->addMenuLink('', '/node/' . $node->id());
-    $this->modifyMenuLink($item);
-
-    // Test that a user with 'administer menu' but without 'bypass node access'
-    // cannot see the menu item.
-    $this->drupalLogout();
-    $this->drupalLogin($this->adminUser);
-    $this->drupalGet('admin/structure/menu/manage/' . $item->getMenuName());
-    $this->assertNoText($item->getTitle(), "Menu link pointing to unpublished node is only visible to users with 'bypass node access' permission");
-    // The cache contexts associated with the (in)accessible menu links are
-    // bubbled. See DefaultMenuLinkTreeManipulators::menuLinkCheckAccess().
-    $this->assertCacheContext('user.permissions');
-  }
-
-  /**
-   * Tests the contextual links on a menu block.
-   */
-  public function testBlockContextualLinks() {
-    $this->drupalLogin($this->drupalCreateUser(['administer menu', 'access contextual links', 'administer blocks']));
-    $custom_menu = $this->addCustomMenu();
-    $this->addMenuLink('', '/', $custom_menu->id());
-    $block = $this->drupalPlaceBlock('system_menu_block:' . $custom_menu->id(), ['label' => 'Custom menu', 'provider' => 'system']);
-    $this->drupalGet('test-page');
-
-    $id = 'block:block=' . $block->id() . ':langcode=en|menu:menu=' . $custom_menu->id() . ':langcode=en';
-    // @see \Drupal\contextual\Tests\ContextualDynamicContextTest:assertContextualLinkPlaceHolder()
-    $this->assertRaw('<div data-contextual-id="' . $id . '"></div>', format_string('Contextual link placeholder with id @id exists.', ['@id' => $id]));
-
-    // Get server-rendered contextual links.
-    // @see \Drupal\contextual\Tests\ContextualDynamicContextTest:renderContextualLinks()
-    $post = ['ids[0]' => $id];
-    $response = $this->drupalPost('contextual/render', 'application/json', $post, ['query' => ['destination' => 'test-page']]);
-    $this->assertResponse(200);
-    $json = Json::decode($response);
-    $this->assertIdentical($json[$id], '<ul class="contextual-links"><li class="block-configure"><a href="' . base_path() . 'admin/structure/block/manage/' . $block->id() . '">Configure block</a></li><li class="entitymenuedit-form"><a href="' . base_path() . 'admin/structure/menu/manage/' . $custom_menu->id() . '">Edit menu</a></li></ul>');
-  }
-
-  /**
-   * Adds a menu link using the UI.
-   *
-   * @param string $parent
-   *   Optional parent menu link id.
-   * @param string $path
-   *   The path to enter on the form. Defaults to the front page.
-   * @param string $menu_name
-   *   Menu name. Defaults to 'tools'.
-   * @param bool $expanded
-   *   Whether or not this menu link is expanded. Setting this to TRUE should
-   *   test whether it works when we do the authenticatedUser tests. Defaults
-   *   to FALSE.
-   * @param string $weight
-   *   Menu weight. Defaults to 0.
-   *
-   * @return \Drupal\menu_link_content\Entity\MenuLinkContent
-   *   A menu link entity.
-   */
-  public function addMenuLink($parent = '', $path = '/', $menu_name = 'tools', $expanded = FALSE, $weight = '0') {
-    // View add menu link page.
-    $this->drupalGet("admin/structure/menu/manage/$menu_name/add");
-    $this->assertResponse(200);
-
-    $title = '!link_' . $this->randomMachineName(16);
-    $edit = [
-      'link[0][uri]' => $path,
-      'title[0][value]' => $title,
-      'description[0][value]' => '',
-      'enabled[value]' => 1,
-      'expanded[value]' => $expanded,
-      'menu_parent' => $menu_name . ':' . $parent,
-      'weight[0][value]' => $weight,
-    ];
-
-    // Add menu link.
-    $this->drupalPostForm(NULL, $edit, t('Save'));
-    $this->assertResponse(200);
-    $this->assertText('The menu link has been saved.');
-
-    $menu_links = entity_load_multiple_by_properties('menu_link_content', ['title' => $title]);
-
-    $menu_link = reset($menu_links);
-    $this->assertTrue($menu_link, 'Menu link was found in database.');
-    $this->assertMenuLink($menu_link->getPluginId(), ['menu_name' => $menu_name, 'children' => [], 'parent' => $parent]);
-
-    return $menu_link;
-  }
-
-  /**
-   * Attempts to add menu link with invalid path or no access permission.
-   */
-  public function addInvalidMenuLink() {
-    foreach (['access' => '/admin/people/permissions'] as $type => $link_path) {
-      $edit = [
-        'link[0][uri]' => $link_path,
-        'title[0][value]' => 'title',
-      ];
-      $this->drupalPostForm("admin/structure/menu/manage/{$this->menu->id()}/add", $edit, t('Save'));
-      $this->assertRaw(t("The path '@link_path' is inaccessible.", ['@link_path' => $link_path]), 'Menu link was not created');
-    }
-  }
-
-  /**
-   * Tests that parent options are limited by depth when adding menu links.
-   */
-  public function checkInvalidParentMenuLinks() {
-    $last_link = NULL;
-    $created_links = [];
-
-    // Get the max depth of the tree.
-    $menu_link_tree = \Drupal::service('menu.link_tree');
-    $max_depth = $menu_link_tree->maxDepth();
-
-    // Create a maximum number of menu links, each a child of the previous.
-    for ($i = 0; $i <= $max_depth - 1; $i++) {
-      $parent = $last_link ? 'tools:' . $last_link->getPluginId() : 'tools:';
-      $title = 'title' . $i;
-      $edit = [
-        'link[0][uri]' => '/',
-        'title[0][value]' => $title,
-        'menu_parent' => $parent,
-        'description[0][value]' => '',
-        'enabled[value]' => 1,
-        'expanded[value]' => FALSE,
-        'weight[0][value]' => '0',
-      ];
-      $this->drupalPostForm("admin/structure/menu/manage/{$this->menu->id()}/add", $edit, t('Save'));
-      $menu_links = entity_load_multiple_by_properties('menu_link_content', ['title' => $title]);
-      $last_link = reset($menu_links);
-      $created_links[]  = 'tools:' . $last_link->getPluginId();
-    }
-
-    // The last link cannot be a parent in the new menu link form.
-    $this->drupalGet('admin/structure/menu/manage/admin/add');
-    $value = 'tools:' . $last_link->getPluginId();
-    $this->assertNoOption('edit-menu-parent', $value, 'The invalid option is not there.');
-
-    // All but the last link can be parents in the new menu link form.
-    array_pop($created_links);
-    foreach ($created_links as $key => $link) {
-      $this->assertOption('edit-menu-parent', $link, 'The valid option number ' . ($key + 1) . ' is there.');
-    }
-  }
-
-  /**
-   * Verifies a menu link using the UI.
-   *
-   * @param \Drupal\menu_link_content\Entity\MenuLinkContent $item
-   *   Menu link.
-   * @param object $item_node
-   *   Menu link content node.
-   * @param \Drupal\menu_link_content\Entity\MenuLinkContent $parent
-   *   Parent menu link.
-   * @param object $parent_node
-   *   Parent menu link content node.
-   */
-  public function verifyMenuLink(MenuLinkContent $item, $item_node, MenuLinkContent $parent = NULL, $parent_node = NULL) {
-    // View home page.
-    $this->drupalGet('');
-    $this->assertResponse(200);
-
-    // Verify parent menu link.
-    if (isset($parent)) {
-      // Verify menu link.
-      $title = $parent->getTitle();
-      $this->assertLink($title, 0, 'Parent menu link was displayed');
-
-      // Verify menu link link.
-      $this->clickLink($title);
-      $title = $parent_node->label();
-      $this->assertTitle(t("@title | Drupal", ['@title' => $title]), 'Parent menu link link target was correct');
-    }
-
-    // Verify menu link.
-    $title = $item->getTitle();
-    $this->assertLink($title, 0, 'Menu link was displayed');
-
-    // Verify menu link link.
-    $this->clickLink($title);
-    $title = $item_node->label();
-    $this->assertTitle(t("@title | Drupal", ['@title' => $title]), 'Menu link link target was correct');
-  }
-
-  /**
-   * Changes the parent of a menu link using the UI.
-   *
-   * @param \Drupal\menu_link_content\MenuLinkContentInterface $item
-   *   The menu link item to move.
-   * @param int $parent
-   *   The id of the new parent.
-   * @param string $menu_name
-   *   The menu the menu link will be moved to.
-   */
-  public function moveMenuLink(MenuLinkContent $item, $parent, $menu_name) {
-    $mlid = $item->id();
-
-    $edit = [
-      'menu_parent' => $menu_name . ':' . $parent,
-    ];
-    $this->drupalPostForm("admin/structure/menu/item/$mlid/edit", $edit, t('Save'));
-    $this->assertResponse(200);
-  }
-
-  /**
-   * Modifies a menu link using the UI.
-   *
-   * @param \Drupal\menu_link_content\Entity\MenuLinkContent $item
-   *   Menu link entity.
-   */
-  public function modifyMenuLink(MenuLinkContent $item) {
-    $item->title->value = $this->randomMachineName(16);
-
-    $mlid = $item->id();
-    $title = $item->getTitle();
-
-    // Edit menu link.
-    $edit = [];
-    $edit['title[0][value]'] = $title;
-    $this->drupalPostForm("admin/structure/menu/item/$mlid/edit", $edit, t('Save'));
-    $this->assertResponse(200);
-    $this->assertText('The menu link has been saved.');
-    // Verify menu link.
-    $this->drupalGet('admin/structure/menu/manage/' . $item->getMenuName());
-    $this->assertText($title, 'Menu link was edited');
-  }
-
-  /**
-   * Resets a standard menu link using the UI.
-   *
-   * @param \Drupal\Core\Menu\MenuLinkInterface $menu_link
-   *   The Menu link.
-   * @param int $old_weight
-   *   Original title for menu link.
-   */
-  public function resetMenuLink(MenuLinkInterface $menu_link, $old_weight) {
-    // Reset menu link.
-    $this->drupalPostForm("admin/structure/menu/link/{$menu_link->getPluginId()}/reset", [], t('Reset'));
-    $this->assertResponse(200);
-    $this->assertRaw(t('The menu link was reset to its default settings.'), 'Menu link was reset');
-
-    // Verify menu link.
-    $instance = \Drupal::service('plugin.manager.menu.link')->createInstance($menu_link->getPluginId());
-    $this->assertEqual($old_weight, $instance->getWeight(), 'Resets to the old weight.');
-  }
-
-  /**
-   * Deletes a menu link using the UI.
-   *
-   * @param \Drupal\menu_link_content\Entity\MenuLinkContent $item
-   *   Menu link.
-   */
-  public function deleteMenuLink(MenuLinkContent $item) {
-    $mlid = $item->id();
-    $title = $item->getTitle();
-
-    // Delete menu link.
-    $this->drupalPostForm("admin/structure/menu/item/$mlid/delete", [], t('Delete'));
-    $this->assertResponse(200);
-    $this->assertRaw(t('The menu link %title has been deleted.', ['%title' => $title]), 'Menu link was deleted');
-
-    // Verify deletion.
-    $this->drupalGet('');
-    $this->assertNoText($title, 'Menu link was deleted');
-  }
-
-  /**
-   * Alternately disables and enables a menu link.
-   *
-   * @param \Drupal\menu_link_content\Entity\MenuLinkContent $item
-   *   Menu link.
-   */
-  public function toggleMenuLink(MenuLinkContent $item) {
-    $this->disableMenuLink($item);
-
-    // Verify menu link is absent.
-    $this->drupalGet('');
-    $this->assertNoText($item->getTitle(), 'Menu link was not displayed');
-    $this->enableMenuLink($item);
-
-    // Verify menu link is displayed.
-    $this->drupalGet('');
-    $this->assertText($item->getTitle(), 'Menu link was displayed');
-  }
-
-  /**
-   * Disables a menu link.
-   *
-   * @param \Drupal\menu_link_content\Entity\MenuLinkContent $item
-   *   Menu link.
-   */
-  public function disableMenuLink(MenuLinkContent $item) {
-    $mlid = $item->id();
-    $edit['enabled[value]'] = FALSE;
-    $this->drupalPostForm("admin/structure/menu/item/$mlid/edit", $edit, t('Save'));
-
-    // Unlike most other modules, there is no confirmation message displayed.
-    // Verify in the database.
-    $this->assertMenuLink($item->getPluginId(), ['enabled' => 0]);
-  }
-
-  /**
-   * Enables a menu link.
-   *
-   * @param \Drupal\menu_link_content\Entity\MenuLinkContent $item
-   *   Menu link.
-   */
-  public function enableMenuLink(MenuLinkContent $item) {
-    $mlid = $item->id();
-    $edit['enabled[value]'] = TRUE;
-    $this->drupalPostForm("admin/structure/menu/item/$mlid/edit", $edit, t('Save'));
-
-    // Verify in the database.
-    $this->assertMenuLink($item->getPluginId(), ['enabled' => 1]);
-  }
-
-  /**
-   * Tests if administrative users other than user 1 can access the menu parents
-   * AJAX callback.
-   */
-  public function testMenuParentsJsAccess() {
-    $admin = $this->drupalCreateUser(['administer menu']);
-    $this->drupalLogin($admin);
-    // Just check access to the callback overall, the POST data is irrelevant.
-    $this->drupalGetAjax('admin/structure/menu/parents');
-    $this->assertResponse(200);
-
-    // Do standard user tests.
-    // Log in the user.
-    $this->drupalLogin($this->authenticatedUser);
-    $this->drupalGetAjax('admin/structure/menu/parents');
-    $this->assertResponse(403);
-  }
-
-  /**
-   * Returns standard menu link.
-   *
-   * @return \Drupal\Core\Menu\MenuLinkInterface
-   *   A menu link plugin.
-   */
-  private function getStandardMenuLink() {
-    // Retrieve menu link id of the Log out menu link, which will always be on
-    // the front page.
-    /** @var \Drupal\Core\Menu\MenuLinkManagerInterface $menu_link_manager */
-    $menu_link_manager = \Drupal::service('plugin.manager.menu.link');
-    $instance = $menu_link_manager->getInstance(['id' => 'user.logout']);
-
-    $this->assertTrue((bool) $instance, 'Standard menu link was loaded');
-    return $instance;
-  }
-
-  /**
-   * Verifies the logged in user has the desired access to various menu pages.
-   *
-   * @param int $response
-   *   (optional) The expected HTTP response code. Defaults to 200.
-   */
-  private function verifyAccess($response = 200) {
-    // View menu help page.
-    $this->drupalGet('admin/help/menu');
-    $this->assertResponse($response);
-    if ($response == 200) {
-      $this->assertText(t('Menu'), 'Menu help was displayed');
-    }
-
-    // View menu build overview page.
-    $this->drupalGet('admin/structure/menu');
-    $this->assertResponse($response);
-    if ($response == 200) {
-      $this->assertText(t('Menus'), 'Menu build overview page was displayed');
-    }
-
-    // View tools menu customization page.
-    $this->drupalGet('admin/structure/menu/manage/' . $this->menu->id());
-    $this->assertResponse($response);
-    if ($response == 200) {
-      $this->assertText(t('Tools'), 'Tools menu page was displayed');
-    }
-
-    // View menu edit page for a static link.
-    $item = $this->getStandardMenuLink();
-    $this->drupalGet('admin/structure/menu/link/' . $item->getPluginId() . '/edit');
-    $this->assertResponse($response);
-    if ($response == 200) {
-      $this->assertText(t('Edit menu item'), 'Menu edit page was displayed');
-    }
-
-    // View add menu page.
-    $this->drupalGet('admin/structure/menu/add');
-    $this->assertResponse($response);
-    if ($response == 200) {
-      $this->assertText(t('Menus'), 'Add menu page was displayed');
-    }
-  }
-
-  /**
-   * Tests menu block settings.
-   */
-  protected function doTestMenuBlock() {
-    $menu_id = $this->menu->id();
-    $block_id = $this->blockPlacements[$menu_id];
-    $this->drupalGet('admin/structure/block/manage/' . $block_id);
-    $this->drupalPostForm(NULL, [
-      'settings[depth]' => 3,
-      'settings[level]' => 2,
-    ], t('Save block'));
-    $block = Block::load($block_id);
-    $settings = $block->getPlugin()->getConfiguration();
-    $this->assertEqual($settings['depth'], 3);
-    $this->assertEqual($settings['level'], 2);
-    // Reset settings.
-    $block->getPlugin()->setConfigurationValue('depth', 0);
-    $block->getPlugin()->setConfigurationValue('level', 1);
-    $block->save();
-  }
-
-}
diff --git a/core/modules/menu_ui/src/Tests/MenuWebTestBase.php b/core/modules/menu_ui/src/Tests/MenuWebTestBase.php
deleted file mode 100644
index e0ee98f..0000000
--- a/core/modules/menu_ui/src/Tests/MenuWebTestBase.php
+++ /dev/null
@@ -1,77 +0,0 @@
-<?php
-
-namespace Drupal\menu_ui\Tests;
-
-use Drupal\simpletest\WebTestBase;
-
-/**
- * Base class for menu web tests.
- */
-abstract class MenuWebTestBase extends WebTestBase {
-
-  /**
-   * Modules to enable.
-   *
-   * @var array
-   */
-  public static $modules = ['menu_ui', 'menu_link_content'];
-
-  /**
-   * Fetches the menu item from the database and compares it to expected item.
-   *
-   * @param int $menu_plugin_id
-   *   Menu item id.
-   * @param array $expected_item
-   *   Array containing properties to verify.
-   */
-  public function assertMenuLink($menu_plugin_id, array $expected_item) {
-    // Retrieve menu link.
-    /** @var \Drupal\Core\Menu\MenuLinkManagerInterface $menu_link_manager */
-    $menu_link_manager = \Drupal::service('plugin.manager.menu.link');
-    $menu_link_manager->resetDefinitions();
-    // Reset the static load cache.
-    \Drupal::entityManager()->getStorage('menu_link_content')->resetCache();
-    $definition = $menu_link_manager->getDefinition($menu_plugin_id);
-
-    $entity = NULL;
-
-    // Pull the path from the menu link content.
-    if (strpos($menu_plugin_id, 'menu_link_content') === 0) {
-      list(, $uuid) = explode(':', $menu_plugin_id, 2);
-      /** @var \Drupal\menu_link_content\Entity\MenuLinkContent $entity */
-      $entity = \Drupal::entityManager()->loadEntityByUuid('menu_link_content', $uuid);
-    }
-
-    if (isset($expected_item['children'])) {
-      $child_ids = array_values($menu_link_manager->getChildIds($menu_plugin_id));
-      sort($expected_item['children']);
-      if ($child_ids) {
-        sort($child_ids);
-      }
-      $this->assertEqual($expected_item['children'], $child_ids);
-      unset($expected_item['children']);
-    }
-
-    if (isset($expected_item['parents'])) {
-      $parent_ids = array_values($menu_link_manager->getParentIds($menu_plugin_id));
-      $this->assertEqual($expected_item['parents'], $parent_ids);
-      unset($expected_item['parents']);
-    }
-
-    if (isset($expected_item['langcode']) && $entity) {
-      $this->assertEqual($entity->langcode->value, $expected_item['langcode']);
-      unset($expected_item['langcode']);
-    }
-
-    if (isset($expected_item['enabled']) && $entity) {
-      $this->assertEqual($entity->enabled->value, $expected_item['enabled']);
-      unset($expected_item['enabled']);
-    }
-
-    foreach ($expected_item as $key => $value) {
-      $this->assertTrue(isset($definition[$key]));
-      $this->assertEqual($definition[$key], $value);
-    }
-  }
-
-}
diff --git a/core/modules/menu_ui/tests/src/Functional/MenuLanguageTest.php b/core/modules/menu_ui/tests/src/Functional/MenuLanguageTest.php
new file mode 100644
index 0000000..eb6ceb5
--- /dev/null
+++ b/core/modules/menu_ui/tests/src/Functional/MenuLanguageTest.php
@@ -0,0 +1,134 @@
+<?php
+
+
+namespace Drupal\Tests\menu_ui\Functional;
+
+use Drupal\Component\Utility\Unicode;
+use Drupal\language\Entity\ConfigurableLanguage;
+use Drupal\language\Entity\ContentLanguageSettings;
+
+/**
+ * Tests for menu_ui language settings.
+ *
+ * Create menu and menu links in non-English language, and edit language
+ * settings.
+ *
+ * @group menu_ui
+ */
+class MenuLanguageTest extends MenuWebTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = ['language'];
+
+  protected function setUp() {
+    parent::setUp();
+
+    $this->drupalLogin($this->drupalCreateUser(['access administration pages', 'administer menu']));
+
+    // Add some custom languages.
+    foreach (['aa', 'bb', 'cc', 'cs'] as $language_code) {
+      ConfigurableLanguage::create([
+        'id' => $language_code,
+        'label' => $this->randomMachineName(),
+      ])->save();
+    }
+  }
+
+  /**
+   * Tests menu language settings and the defaults for menu link items.
+   */
+  public function testMenuLanguage() {
+    // Create a test menu to test the various language-related settings.
+    // Machine name has to be lowercase.
+    $menu_name = Unicode::strtolower($this->randomMachineName(16));
+    $label = $this->randomString();
+    $edit = [
+      'id' => $menu_name,
+      'description' => '',
+      'label' => $label,
+      'langcode' => 'aa',
+    ];
+    $this->drupalPostForm('admin/structure/menu/add', $edit, t('Save'));
+    ContentLanguageSettings::loadByEntityTypeBundle('menu_link_content', 'menu_link_content')
+      ->setDefaultLangcode('bb')
+      ->setLanguageAlterable(TRUE)
+      ->save();
+
+    // Check menu language.
+    $this->assertOptionSelected('edit-langcode', $edit['langcode'], 'The menu language was correctly selected.');
+
+    // Test menu link language.
+    $link_path = '/';
+
+    // Add a menu link.
+    $link_title = $this->randomString();
+    $edit = [
+      'title[0][value]' => $link_title,
+      'link[0][uri]' => $link_path,
+    ];
+    $this->drupalPostForm("admin/structure/menu/manage/$menu_name/add", $edit, t('Save'));
+    // Check the link was added with the correct menu link default language.
+    $menu_links = entity_load_multiple_by_properties('menu_link_content', ['title' => $link_title]);
+    $menu_link = reset($menu_links);
+    $this->assertMenuLink($menu_link->getPluginId(), [
+      'menu_name' => $menu_name,
+      'route_name' => '<front>',
+      'langcode' => 'bb',
+    ]);
+
+    // Edit menu link default, changing it to cc.
+    ContentLanguageSettings::loadByEntityTypeBundle('menu_link_content', 'menu_link_content')
+      ->setDefaultLangcode('cc')
+      ->setLanguageAlterable(TRUE)
+      ->save();
+
+    // Add a menu link.
+    $link_title = $this->randomString();
+    $edit = [
+      'title[0][value]' => $link_title,
+      'link[0][uri]' => $link_path,
+    ];
+    $this->drupalPostForm("admin/structure/menu/manage/$menu_name/add", $edit, t('Save'));
+    // Check the link was added with the correct new menu link default language.
+    $menu_links = entity_load_multiple_by_properties('menu_link_content', ['title' => $link_title]);
+    $menu_link = reset($menu_links);
+    $this->assertMenuLink($menu_link->getPluginId(), [
+      'menu_name' => $menu_name,
+      'route_name' => '<front>',
+      'langcode' => 'cc',
+    ]);
+
+    // Now change the language of the new link to 'bb'.
+    $edit = [
+      'langcode[0][value]' => 'bb',
+    ];
+    $this->drupalPostForm('admin/structure/menu/item/' . $menu_link->id() . '/edit', $edit, t('Save'));
+    $this->assertMenuLink($menu_link->getPluginId(), [
+      'menu_name' => $menu_name,
+      'route_name' => '<front>',
+      'langcode' => 'bb',
+    ]);
+
+    // Saving menu link items ends up on the edit menu page. To check the menu
+    // link has the correct language default on edit, go to the menu link edit
+    // page first.
+    $this->drupalGet('admin/structure/menu/item/' . $menu_link->id() . '/edit');
+    // Check that the language selector has the correct default value.
+    $this->assertOptionSelected('edit-langcode-0-value', 'bb', 'The menu link language was correctly selected.');
+
+    // Edit menu to hide the language select on menu link item add.
+    ContentLanguageSettings::loadByEntityTypeBundle('menu_link_content', 'menu_link_content')
+      ->setDefaultLangcode('cc')
+      ->setLanguageAlterable(FALSE)
+      ->save();
+
+    // Check that the language selector is not available on menu link add page.
+    $this->drupalGet("admin/structure/menu/manage/$menu_name/add");
+    $this->assertNoField('edit-langcode-0-value', 'The language selector field was hidden the page');
+  }
+
+}
diff --git a/core/modules/menu_ui/tests/src/Functional/MenuNodeTest.php b/core/modules/menu_ui/tests/src/Functional/MenuNodeTest.php
new file mode 100644
index 0000000..6c9a012
--- /dev/null
+++ b/core/modules/menu_ui/tests/src/Functional/MenuNodeTest.php
@@ -0,0 +1,338 @@
+<?php
+
+namespace Drupal\Tests\menu_ui\Functional;
+
+use Drupal\Tests\BrowserTestBase;
+
+/**
+ * Add, edit, and delete a node with menu link.
+ *
+ * @group menu_ui
+ */
+class MenuNodeTest extends BrowserTestBase {
+
+  /**
+   * An editor user.
+   *
+   * @var \Drupal\user\UserInterface
+   */
+  protected $editor;
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = ['menu_ui', 'test_page_test', 'node', 'block', 'locale', 'language', 'content_translation'];
+
+  protected function setUp() {
+    parent::setUp();
+
+    $this->drupalPlaceBlock('system_menu_block:main');
+    $this->drupalPlaceBlock('page_title_block');
+
+    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
+
+    $this->editor = $this->drupalCreateUser([
+      'access administration pages',
+      'administer content types',
+      'administer menu',
+      'create page content',
+      'edit any page content',
+      'delete any page content',
+      'create content translations',
+      'update content translations',
+      'delete content translations',
+      'translate any entity',
+    ]);
+    $this->drupalLogin($this->editor);
+  }
+
+  /**
+   * Test creating, editing, deleting menu links via node form widget.
+   */
+  public function testMenuNodeFormWidget() {
+    // Verify that cacheability metadata is bubbled from the menu link tree
+    // access checking that is performed when determining the "default parent
+    // item" options in menu_ui_form_node_type_form_alter(). The "log out" link
+    // adds the "user.roles:authenticated" cache context.
+    $this->drupalGet('admin/structure/types/manage/page');
+    $this->assertCacheContext('user.roles:authenticated');
+
+    // Verify that the menu link title has the correct maxlength.
+    $max_length = \Drupal::entityManager()->getBaseFieldDefinitions('menu_link_content')['title']->getSetting('max_length');
+    $this->drupalGet('node/add/page');
+    $this->assertPattern('/<input .* id="edit-menu-title" .* maxlength="' . $max_length . '" .* \/>/', 'Menu link title field has correct maxlength in node add form.');
+
+    // Disable the default main menu, so that no menus are enabled.
+    $edit = [
+      'menu_options[main]' => FALSE,
+    ];
+    $this->drupalPostForm('admin/structure/types/manage/page', $edit, t('Save content type'));
+
+    // Verify that no menu settings are displayed and nodes can be created.
+    $this->drupalGet('node/add/page');
+    $this->assertText(t('Create Basic page'));
+    $this->assertNoText(t('Menu settings'));
+    $node_title = $this->randomMachineName();
+    $edit = [
+      'title[0][value]' => $node_title,
+      'body[0][value]' => $this->randomString(),
+    ];
+    $this->drupalPostForm(NULL, $edit, t('Save'));
+    $node = $this->drupalGetNodeByTitle($node_title);
+    $this->assertEqual($node->getTitle(), $edit['title[0][value]']);
+
+    // Test that we cannot set a menu item from a menu that is not set as
+    // available.
+    $edit = [
+      'menu_options[tools]' => 1,
+      'menu_parent' => 'main:',
+    ];
+    $this->drupalPostForm('admin/structure/types/manage/page', $edit, t('Save content type'));
+    $this->assertText(t('The selected menu item is not under one of the selected menus.'));
+    $this->assertNoRaw(t('The content type %name has been updated.', ['%name' => 'Basic page']));
+
+    // Enable Tools menu as available menu.
+    $edit = [
+      'menu_options[main]' => 1,
+      'menu_options[tools]' => 1,
+      'menu_parent' => 'main:',
+    ];
+    $this->drupalPostForm('admin/structure/types/manage/page', $edit, t('Save content type'));
+    $this->assertRaw(t('The content type %name has been updated.', ['%name' => 'Basic page']));
+
+    // Test that we can preview a node that will create a menu item.
+    $edit = [
+      'title[0][value]' => $node_title,
+      'menu[enabled]' => 1,
+      'menu[title]' => 'Test preview',
+    ];
+    $this->drupalPostForm('node/add/page', $edit, t('Preview'));
+
+    // Create a node.
+    $node_title = $this->randomMachineName();
+    $edit = [
+      'title[0][value]' => $node_title,
+      'body[0][value]' => $this->randomString(),
+    ];
+    $this->drupalPostForm('node/add/page', $edit, t('Save'));
+    $node = $this->drupalGetNodeByTitle($node_title);
+    // Assert that there is no link for the node.
+    $this->drupalGet('test-page');
+    $this->assertNoLink($node_title);
+
+    // Edit the node, enable the menu link setting, but skip the link title.
+    $edit = [
+      'menu[enabled]' => 1,
+    ];
+    $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
+    // Assert that there is no link for the node.
+    $this->drupalGet('test-page');
+    $this->assertNoLink($node_title);
+
+    // Use not only the save button, but also the two special buttons:
+    // 'Save and publish' as well as 'Save and keep published'.
+    // These buttons just appear for 'administer nodes' users.
+    $admin_user = $this->drupalCreateUser([
+      'access administration pages',
+      'administer content types',
+      'administer nodes',
+      'administer menu',
+      'create page content',
+      'edit any page content',
+    ]);
+    $this->drupalLogin($admin_user);
+    foreach (['Save and unpublish' => FALSE, 'Save and keep unpublished' => FALSE, 'Save and publish' => TRUE, 'Save and keep published' => TRUE] as $submit => $visible) {
+      $edit = [
+        'menu[enabled]' => 1,
+        'menu[title]' => $node_title,
+      ];
+      $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, $submit);
+      // Assert that the link exists.
+      $this->drupalGet('test-page');
+      if ($visible) {
+        $this->assertLink($node_title, 0, 'Found a menu link after submitted with ' . $submit);
+      }
+      else {
+        $this->assertNoLink($node_title, 'Found no menu link after submitted with ' . $submit);
+      }
+    }
+
+    // Log back in as normal user.
+    $this->drupalLogin($this->editor);
+    // Edit the node and create a menu link.
+    $edit = [
+      'menu[enabled]' => 1,
+      'menu[title]' => $node_title,
+      'menu[weight]' => 17,
+    ];
+    $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
+    // Assert that the link exists.
+    $this->drupalGet('test-page');
+    $this->assertLink($node_title);
+
+    $this->drupalGet('node/' . $node->id() . '/edit');
+    $this->assertFieldById('edit-menu-weight', 17, 'Menu weight correct in edit form');
+    $this->assertPattern('/<input .* id="edit-menu-title" .* maxlength="' . $max_length . '" .* \/>/', 'Menu link title field has correct maxlength in node edit form.');
+
+    // Disable the menu link, then edit the node--the link should stay disabled.
+    $link_id = menu_ui_get_menu_link_defaults($node)['entity_id'];
+    /** @var \Drupal\menu_link_content\Entity\MenuLinkContent $link */
+    $link = MenuLinkContent::load($link_id);
+    $link->set('enabled', FALSE);
+    $link->save();
+    $this->drupalPostForm($node->urlInfo('edit-form'), $edit, t('Save'));
+    $link = MenuLinkContent::load($link_id);
+    $this->assertFalse($link->isEnabled(), 'Saving a node with a disabled menu link keeps the menu link disabled.');
+
+    // Edit the node and remove the menu link.
+    $edit = [
+      'menu[enabled]' => FALSE,
+    ];
+    $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
+    // Assert that there is no link for the node.
+    $this->drupalGet('test-page');
+    $this->assertNoLink($node_title);
+
+    // Add a menu link to the Administration menu.
+    $item = MenuLinkContent::create([
+      'link' => [['uri' => 'entity:node/' . $node->id()]],
+      'title' => $this->randomMachineName(16),
+      'menu_name' => 'admin',
+    ]);
+    $item->save();
+
+    // Assert that disabled Administration menu is not shown on the
+    // node/$nid/edit page.
+    $this->drupalGet('node/' . $node->id() . '/edit');
+    $this->assertText('Provide a menu link', 'Link in not allowed menu not shown in node edit form');
+    // Assert that the link is still in the Administration menu after save.
+    $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
+    $link = MenuLinkContent::load($item->id());
+    $this->assertTrue($link, 'Link in not allowed menu still exists after saving node');
+
+    // Move the menu link back to the Tools menu.
+    $item->menu_name->value = 'tools';
+    $item->save();
+    // Create a second node.
+    $child_node = $this->drupalCreateNode(['type' => 'article']);
+    // Assign a menu link to the second node, being a child of the first one.
+    $child_item = MenuLinkContent::create([
+      'link' => [['uri' => 'entity:node/' . $child_node->id()]],
+      'title' => $this->randomMachineName(16),
+      'parent' => $item->getPluginId(),
+      'menu_name' => $item->getMenuName(),
+    ]);
+    $child_item->save();
+    // Edit the first node.
+    $this->drupalGet('node/' . $node->id() . '/edit');
+    // Assert that it is not possible to set the parent of the first node to itself or the second node.
+    $this->assertNoOption('edit-menu-menu-parent', 'tools:' . $item->getPluginId());
+    $this->assertNoOption('edit-menu-menu-parent', 'tools:' . $child_item->getPluginId());
+    // Assert that unallowed Administration menu is not available in options.
+    $this->assertNoOption('edit-menu-menu-parent', 'admin:');
+  }
+
+  /**
+   * Testing correct loading and saving of menu links via node form widget in a multilingual environment.
+   */
+  public function testMultilingualMenuNodeFormWidget() {
+    // Setup languages.
+    $langcodes = ['de'];
+    foreach ($langcodes as $langcode) {
+      ConfigurableLanguage::createFromLangcode($langcode)->save();
+    }
+    array_unshift($langcodes, \Drupal::languageManager()->getDefaultLanguage()->getId());
+
+    $config = \Drupal::service('config.factory')->getEditable('language.negotiation');
+    // Ensure path prefix is used to determine the language.
+    $config->set('url.source', 'path_prefix');
+    // Ensure that there's a path prefix set for english as well.
+    $config->set('url.prefixes.' . $langcodes[0], $langcodes[0]);
+    $config->save();
+
+    $this->rebuildContainer();
+
+    $languages = [];
+    foreach ($langcodes as $langcode) {
+      $languages[$langcode] = ConfigurableLanguage::load($langcode);
+    }
+
+    // Use a UI form submission to make the node type and menu link content entity translatable.
+    $this->drupalLogout();
+    $this->drupalLogin($this->rootUser);
+    $edit = [
+      'entity_types[node]' => TRUE,
+      'entity_types[menu_link_content]' => TRUE,
+      'settings[node][page][settings][language][language_alterable]' => TRUE,
+      'settings[node][page][translatable]' => TRUE,
+      'settings[node][page][fields][title]' => TRUE,
+      'settings[menu_link_content][menu_link_content][translatable]' => TRUE,
+    ];
+    $this->drupalPostForm('admin/config/regional/content-language', $edit, t('Save configuration'));
+
+    // Log out and back in as normal user.
+    $this->drupalLogout();
+    $this->drupalLogin($this->editor);
+
+    // Create a node.
+    $node_title = $this->randomMachineName(8);
+    $node = Node::create([
+      'type' => 'page',
+      'title' => $node_title,
+      'body' => $this->randomMachineName(16),
+      'uid' => $this->editor->id(),
+      'status' => 1,
+      'langcode' => $langcodes[0],
+    ]);
+    $node->save();
+
+    // Create translation.
+    $translated_node_title = $this->randomMachineName(8);
+    $node->addTranslation($langcodes[1], ['title' => $translated_node_title, 'body' => $this->randomMachineName(16), 'status' => 1]);
+    $node->save();
+
+    // Edit the node and create a menu link.
+    $edit = [
+      'menu[enabled]' => 1,
+      'menu[title]' => $node_title,
+      'menu[weight]' => 17,
+    ];
+    $options = ['language' => $languages[$langcodes[0]]];
+    $url = $node->toUrl('edit-form', $options);
+    $this->drupalPostForm($url, $edit, t('Save') . ' ' . t('(this translation)'));
+
+    // Edit the node in a different language and translate the menu link.
+    $edit = [
+      'menu[enabled]' => 1,
+      'menu[title]' => $translated_node_title,
+      'menu[weight]' => 17,
+    ];
+    $options = ['language' => $languages[$langcodes[1]]];
+    $url = $node->toUrl('edit-form', $options);
+    $this->drupalPostForm($url, $edit, t('Save') . ' ' . t('(this translation)'));
+
+    // Assert that the original link exists in the frontend.
+    $this->drupalGet('node/' . $node->id(), ['language' => $languages[$langcodes[0]]]);
+    $this->assertLink($node_title);
+
+    // Assert that the translated link exists in the frontend.
+    $this->drupalGet('node/' . $node->id(), ['language' => $languages[$langcodes[1]]]);
+    $this->assertLink($translated_node_title);
+
+    // Revisit the edit page in original language, check the loaded menu item title and save.
+    $options = ['language' => $languages[$langcodes[0]]];
+    $url = $node->toUrl('edit-form', $options);
+    $this->drupalGet($url);
+    $this->assertFieldById('edit-menu-title', $node_title);
+    $this->drupalPostForm(NULL, [], t('Save') . ' ' . t('(this translation)'));
+
+    // Revisit the edit page of the translation and check the loaded menu item title.
+    $options = ['language' => $languages[$langcodes[1]]];
+    $url = $node->toUrl('edit-form', $options);
+    $this->drupalGet($url);
+    $this->assertFieldById('edit-menu-title', $translated_node_title);
+  }
+
+}
diff --git a/core/modules/menu_ui/tests/src/Functional/MenuTest.php b/core/modules/menu_ui/tests/src/Functional/MenuTest.php
new file mode 100644
index 0000000..24a218b
--- /dev/null
+++ b/core/modules/menu_ui/tests/src/Functional/MenuTest.php
@@ -0,0 +1,962 @@
+<?php
+
+namespace Drupal\Tests\menu_ui\Functional;
+
+use Drupal\block\Entity\Block;
+use Drupal\Component\Serialization\Json;
+use Drupal\Component\Utility\Unicode;
+use Drupal\Core\Menu\MenuLinkInterface;
+use Drupal\Core\Url;
+use Drupal\menu_link_content\Entity\MenuLinkContent;
+use Drupal\system\Entity\Menu;
+use Drupal\node\Entity\Node;
+use Drupal\node\NodeInterface;
+
+/**
+ * Add a custom menu, add menu links to the custom menu and Tools menu, check
+ * their data, and delete them using the UI.
+ *
+ * @group menu_ui
+ */
+class MenuTest extends MenuWebTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = ['node', 'block', 'contextual', 'help', 'path', 'test_page_test'];
+
+  /**
+   * A user with administration rights.
+   *
+   * @var \Drupal\user\UserInterface
+   */
+  protected $adminUser;
+
+  /**
+   * An authenticated user.
+   *
+   * @var \Drupal\user\UserInterface
+   */
+  protected $authenticatedUser;
+
+  /**
+   * Array of placed menu blocks keyed by block ID.
+   *
+   * @var array
+   */
+  protected $blockPlacements;
+
+  /**
+   * A test menu.
+   *
+   * @var \Drupal\system\Entity\Menu
+   */
+  protected $menu;
+
+  /**
+   * An array of test menu links.
+   *
+   * @var \Drupal\menu_link_content\MenuLinkContentInterface[]
+   */
+  protected $items;
+
+  protected function setUp() {
+    parent::setUp();
+
+    $this->drupalPlaceBlock('page_title_block');
+
+    $this->drupalCreateContentType(['type' => 'article', 'name' => 'Article']);
+
+    // Create users.
+    $this->adminUser = $this->drupalCreateUser(['access administration pages', 'administer blocks', 'administer menu', 'create article content']);
+    $this->authenticatedUser = $this->drupalCreateUser([]);
+  }
+
+  /**
+   * Tests menu functionality using the admin and user interfaces.
+   */
+  public function testMenu() {
+    // Log in the user.
+    $this->drupalLogin($this->adminUser);
+    $this->items = [];
+
+    $this->menu = $this->addCustomMenu();
+    $this->doMenuTests();
+    $this->doTestMenuBlock();
+    $this->addInvalidMenuLink();
+    $this->addCustomMenuCRUD();
+
+    // Verify that the menu links rebuild is idempotent and leaves the same
+    // number of links in the table.
+    /** @var \Drupal\Core\Menu\MenuLinkManagerInterface $menu_link_manager */
+    $menu_link_manager = \Drupal::service('plugin.manager.menu.link');
+    $before_count = $menu_link_manager->countMenuLinks(NULL);
+    $menu_link_manager->rebuild();
+    $after_count = $menu_link_manager->countMenuLinks(NULL);
+    $this->assertIdentical($before_count, $after_count, 'MenuLinkManager::rebuild() does not add more links');
+    // Do standard user tests.
+    // Log in the user.
+    $this->drupalLogin($this->authenticatedUser);
+    $this->verifyAccess(403);
+
+    foreach ($this->items as $item) {
+      // Menu link URIs are stored as 'internal:/node/$nid'.
+      $node = Node::load(str_replace('internal:/node/', '', $item->link->uri));
+      $this->verifyMenuLink($item, $node);
+    }
+
+    // Log in the administrator.
+    $this->drupalLogin($this->adminUser);
+
+    // Verify delete link exists and reset link does not exist.
+    $this->drupalGet('admin/structure/menu/manage/' . $this->menu->id());
+    $this->assertLinkByHref(Url::fromRoute('entity.menu_link_content.delete_form', ['menu_link_content' => $this->items[0]->id()])->toString());
+    $this->assertNoLinkByHref(Url::fromRoute('menu_ui.link_reset', ['menu_link_plugin' => $this->items[0]->getPluginId()])->toString());
+    // Check delete and reset access.
+    $this->drupalGet('admin/structure/menu/item/' . $this->items[0]->id() . '/delete');
+    $this->assertResponse(200);
+    $this->drupalGet('admin/structure/menu/link/' . $this->items[0]->getPluginId() . '/reset');
+    $this->assertResponse(403);
+
+    // Delete menu links.
+    foreach ($this->items as $item) {
+      $this->deleteMenuLink($item);
+    }
+
+    // Delete custom menu.
+    $this->deleteCustomMenu();
+
+    // Modify and reset a standard menu link.
+    $instance = $this->getStandardMenuLink();
+    $old_weight = $instance->getWeight();
+    // Edit the static menu link.
+    $edit = [];
+    $edit['weight'] = 10;
+    $id = $instance->getPluginId();
+    $this->drupalPostForm("admin/structure/menu/link/$id/edit", $edit, t('Save'));
+    $this->assertResponse(200);
+    $this->assertText('The menu link has been saved.');
+    $menu_link_manager->resetDefinitions();
+
+    $instance = $menu_link_manager->createInstance($instance->getPluginId());
+    $this->assertEqual($edit['weight'], $instance->getWeight(), 'Saving an existing link updates the weight.');
+    $this->resetMenuLink($instance, $old_weight);
+  }
+
+  /**
+   * Adds a custom menu using CRUD functions.
+   */
+  public function addCustomMenuCRUD() {
+    // Add a new custom menu.
+    $menu_name = substr(hash('sha256', $this->randomMachineName(16)), 0, MENU_MAX_MENU_NAME_LENGTH_UI);
+    $label = $this->randomMachineName(16);
+
+    $menu = Menu::create([
+      'id' => $menu_name,
+      'label' => $label,
+      'description' => 'Description text',
+    ]);
+    $menu->save();
+
+    // Assert the new menu.
+    $this->drupalGet('admin/structure/menu/manage/' . $menu_name);
+    $this->assertRaw($label, 'Custom menu was added.');
+
+    // Edit the menu.
+    $new_label = $this->randomMachineName(16);
+    $menu->set('label', $new_label);
+    $menu->save();
+    $this->drupalGet('admin/structure/menu/manage/' . $menu_name);
+    $this->assertRaw($new_label, 'Custom menu was edited.');
+  }
+
+  /**
+   * Creates a custom menu.
+   *
+   * @return \Drupal\system\Entity\Menu
+   *   The custom menu that has been created.
+   */
+  public function addCustomMenu() {
+    // Try adding a menu using a menu_name that is too long.
+    $this->drupalGet('admin/structure/menu/add');
+    $menu_name = substr(hash('sha256', $this->randomMachineName(16)), 0, MENU_MAX_MENU_NAME_LENGTH_UI + 1);
+    $label = $this->randomMachineName(16);
+    $edit = [
+      'id' => $menu_name,
+      'description' => '',
+      'label' => $label,
+    ];
+    $this->drupalPostForm('admin/structure/menu/add', $edit, t('Save'));
+
+    // Verify that using a menu_name that is too long results in a validation
+    // message.
+    $this->assertRaw(t('@name cannot be longer than %max characters but is currently %length characters long.', [
+      '@name' => t('Menu name'),
+      '%max' => MENU_MAX_MENU_NAME_LENGTH_UI,
+      '%length' => Unicode::strlen($menu_name),
+    ]));
+
+    // Change the menu_name so it no longer exceeds the maximum length.
+    $menu_name = substr(hash('sha256', $this->randomMachineName(16)), 0, MENU_MAX_MENU_NAME_LENGTH_UI);
+    $edit['id'] = $menu_name;
+    $this->drupalPostForm('admin/structure/menu/add', $edit, t('Save'));
+
+    // Verify that no validation error is given for menu_name length.
+    $this->assertNoRaw(t('@name cannot be longer than %max characters but is currently %length characters long.', [
+      '@name' => t('Menu name'),
+      '%max' => MENU_MAX_MENU_NAME_LENGTH_UI,
+      '%length' => Unicode::strlen($menu_name),
+    ]));
+    // Verify that the confirmation message is displayed.
+    $this->assertRaw(t('Menu %label has been added.', ['%label' => $label]));
+    $this->drupalGet('admin/structure/menu');
+    $this->assertText($label, 'Menu created');
+
+    // Confirm that the custom menu block is available.
+    $this->drupalGet('admin/structure/block/list/' . $this->config('system.theme')->get('default'));
+    $this->clickLinkPartialName('Place block');
+    $this->assertText($label);
+
+    // Enable the block.
+    $block = $this->drupalPlaceBlock('system_menu_block:' . $menu_name);
+    $this->blockPlacements[$menu_name] = $block->id();
+    return Menu::load($menu_name);
+  }
+
+  /**
+   * Deletes the locally stored custom menu.
+   *
+   * This deletes the custom menu that is stored in $this->menu and performs
+   * tests on the menu delete user interface.
+   */
+  public function deleteCustomMenu() {
+    $menu_name = $this->menu->id();
+    $label = $this->menu->label();
+
+    // Delete custom menu.
+    $this->drupalPostForm("admin/structure/menu/manage/$menu_name/delete", [], t('Delete'));
+    $this->assertResponse(200);
+    $this->assertRaw(t('The menu %title has been deleted.', ['%title' => $label]), 'Custom menu was deleted');
+    $this->assertNull(Menu::load($menu_name), 'Custom menu was deleted');
+    // Test if all menu links associated with the menu were removed from
+    // database.
+    $result = entity_load_multiple_by_properties('menu_link_content', ['menu_name' => $menu_name]);
+    $this->assertFalse($result, 'All menu links associated with the custom menu were deleted.');
+
+    // Make sure there's no delete button on system menus.
+    $this->drupalGet('admin/structure/menu/manage/main');
+    $this->assertNoRaw('edit-delete', 'The delete button was not found');
+
+    // Try to delete the main menu.
+    $this->drupalGet('admin/structure/menu/manage/main/delete');
+    $this->assertText(t('You are not authorized to access this page.'));
+  }
+
+  /**
+   * Tests menu functionality.
+   */
+  public function doMenuTests() {
+    $menu_name = $this->menu->id();
+
+    // Test the 'Add link' local action.
+    $this->drupalGet(Url::fromRoute('entity.menu.edit_form', ['menu' => $menu_name]));
+
+    $this->clickLink(t('Add link'));
+    $link_title = $this->randomString();
+    $this->drupalPostForm(NULL, ['link[0][uri]' => '/', 'title[0][value]' => $link_title], t('Save'));
+    $this->assertUrl(Url::fromRoute('entity.menu.edit_form', ['menu' => $menu_name]));
+    // Test the 'Edit' operation.
+    $this->clickLink(t('Edit'));
+    $this->assertFieldByName('title[0][value]', $link_title);
+    $link_title = $this->randomString();
+    $this->drupalPostForm(NULL, ['title[0][value]' => $link_title], t('Save'));
+    $this->assertUrl(Url::fromRoute('entity.menu.edit_form', ['menu' => $menu_name]));
+    // Test the 'Delete' operation.
+    $this->clickLink(t('Delete'));
+    $this->assertRaw(t('Are you sure you want to delete the custom menu link %item?', ['%item' => $link_title]));
+    $this->drupalPostForm(NULL, [], t('Delete'));
+    $this->assertUrl(Url::fromRoute('entity.menu.edit_form', ['menu' => $menu_name]));
+
+    // Add nodes to use as links for menu links.
+    $node1 = $this->drupalCreateNode(['type' => 'article']);
+    $node2 = $this->drupalCreateNode(['type' => 'article']);
+    $node3 = $this->drupalCreateNode(['type' => 'article']);
+    $node4 = $this->drupalCreateNode(['type' => 'article']);
+    // Create a node with an alias.
+    $node5 = $this->drupalCreateNode([
+      'type' => 'article',
+      'path' => [
+        'alias' => '/node5',
+      ],
+    ]);
+
+    // Verify add link button.
+    $this->drupalGet('admin/structure/menu');
+    $this->assertLinkByHref('admin/structure/menu/manage/' . $menu_name . '/add', 0, "The add menu link button URL is correct");
+
+    // Verify form defaults.
+    $this->doMenuLinkFormDefaultsTest();
+
+    // Add menu links.
+    $item1 = $this->addMenuLink('', '/node/' . $node1->id(), $menu_name, TRUE);
+    $item2 = $this->addMenuLink($item1->getPluginId(), '/node/' . $node2->id(), $menu_name, FALSE);
+    $item3 = $this->addMenuLink($item2->getPluginId(), '/node/' . $node3->id(), $menu_name);
+
+    // Hierarchy
+    // <$menu_name>
+    // - item1
+    // -- item2
+    // --- item3
+
+    $this->assertMenuLink($item1->getPluginId(), [
+      'children' => [$item2->getPluginId(), $item3->getPluginId()],
+      'parents' => [$item1->getPluginId()],
+      // We assert the language code here to make sure that the language
+      // selection element degrades gracefully without the Language module.
+      'langcode' => 'en',
+    ]);
+    $this->assertMenuLink($item2->getPluginId(), [
+      'children' => [$item3->getPluginId()],
+      'parents' => [$item2->getPluginId(), $item1->getPluginId()],
+      // See above.
+      'langcode' => 'en',
+    ]);
+    $this->assertMenuLink($item3->getPluginId(), [
+      'children' => [],
+      'parents' => [$item3->getPluginId(), $item2->getPluginId(), $item1->getPluginId()],
+      // See above.
+      'langcode' => 'en',
+    ]);
+
+    // Verify menu links.
+    $this->verifyMenuLink($item1, $node1);
+    $this->verifyMenuLink($item2, $node2, $item1, $node1);
+    $this->verifyMenuLink($item3, $node3, $item2, $node2);
+
+    // Add more menu links.
+    $item4 = $this->addMenuLink('', '/node/' . $node4->id(), $menu_name);
+    $item5 = $this->addMenuLink($item4->getPluginId(), '/node/' . $node5->id(), $menu_name);
+    // Create a menu link pointing to an alias.
+    $item6 = $this->addMenuLink($item4->getPluginId(), '/node5', $menu_name, TRUE, '0');
+
+    // Hierarchy
+    // <$menu_name>
+    // - item1
+    // -- item2
+    // --- item3
+    // - item4
+    // -- item5
+    // -- item6
+
+    $this->assertMenuLink($item4->getPluginId(), [
+      'children' => [$item5->getPluginId(), $item6->getPluginId()],
+      'parents' => [$item4->getPluginId()],
+      // See above.
+      'langcode' => 'en',
+    ]);
+    $this->assertMenuLink($item5->getPluginId(), [
+      'children' => [],
+      'parents' => [$item5->getPluginId(), $item4->getPluginId()],
+      'langcode' => 'en',
+    ]);
+    $this->assertMenuLink($item6->getPluginId(), [
+      'children' => [],
+      'parents' => [$item6->getPluginId(), $item4->getPluginId()],
+      'route_name' => 'entity.node.canonical',
+      'route_parameters' => ['node' => $node5->id()],
+      'url' => '',
+      // See above.
+      'langcode' => 'en',
+    ]);
+
+    // Modify menu links.
+    $this->modifyMenuLink($item1);
+    $this->modifyMenuLink($item2);
+
+    // Toggle menu links.
+    $this->toggleMenuLink($item1);
+    $this->toggleMenuLink($item2);
+
+    // Move link and verify that descendants are updated.
+    $this->moveMenuLink($item2, $item5->getPluginId(), $menu_name);
+    // Hierarchy
+    // <$menu_name>
+    // - item1
+    // - item4
+    // -- item5
+    // --- item2
+    // ---- item3
+    // -- item6
+
+    $this->assertMenuLink($item1->getPluginId(), [
+      'children' => [],
+      'parents' => [$item1->getPluginId()],
+      // See above.
+      'langcode' => 'en',
+    ]);
+    $this->assertMenuLink($item4->getPluginId(), [
+      'children' => [$item5->getPluginId(), $item6->getPluginId(), $item2->getPluginId(), $item3->getPluginId()],
+      'parents' => [$item4->getPluginId()],
+      // See above.
+      'langcode' => 'en',
+    ]);
+
+    $this->assertMenuLink($item5->getPluginId(), [
+      'children' => [$item2->getPluginId(), $item3->getPluginId()],
+      'parents' => [$item5->getPluginId(), $item4->getPluginId()],
+      // See above.
+      'langcode' => 'en',
+    ]);
+    $this->assertMenuLink($item2->getPluginId(), [
+      'children' => [$item3->getPluginId()],
+      'parents' => [$item2->getPluginId(), $item5->getPluginId(), $item4->getPluginId()],
+      // See above.
+      'langcode' => 'en',
+    ]);
+    $this->assertMenuLink($item3->getPluginId(), [
+      'children' => [],
+      'parents' => [$item3->getPluginId(), $item2->getPluginId(), $item5->getPluginId(), $item4->getPluginId()],
+      // See above.
+      'langcode' => 'en',
+    ]);
+
+    // Add 102 menu links with increasing weights, then make sure the last-added
+    // item's weight doesn't get changed because of the old hardcoded delta=50.
+    $items = [];
+    for ($i = -50; $i <= 51; $i++) {
+      $items[$i] = $this->addMenuLink('', '/node/' . $node1->id(), $menu_name, TRUE, strval($i));
+    }
+    $this->assertMenuLink($items[51]->getPluginId(), ['weight' => '51']);
+
+    // Disable a link and then re-enable the link via the overview form.
+    $this->disableMenuLink($item1);
+    $edit = [];
+    $edit['links[menu_plugin_id:' . $item1->getPluginId() . '][enabled]'] = TRUE;
+    $this->drupalPostForm('admin/structure/menu/manage/' . $item1->getMenuName(), $edit, t('Save'));
+
+    // Mark item2, item4 and item5 as expanded.
+    // This is done in order to show them on the frontpage.
+    $item2->expanded->value = 1;
+    $item2->save();
+    $item4->expanded->value = 1;
+    $item4->save();
+    $item5->expanded->value = 1;
+    $item5->save();
+
+    // Verify in the database.
+    $this->assertMenuLink($item1->getPluginId(), ['enabled' => 1]);
+
+    // Add an external link.
+    $item7 = $this->addMenuLink('', 'https://www.drupal.org', $menu_name);
+    $this->assertMenuLink($item7->getPluginId(), ['url' => 'https://www.drupal.org']);
+
+    // Add <front> menu item.
+    $item8 = $this->addMenuLink('', '/', $menu_name);
+    $this->assertMenuLink($item8->getPluginId(), ['route_name' => '<front>']);
+    $this->drupalGet('');
+    $this->assertResponse(200);
+    // Make sure we get routed correctly.
+    $this->clickLink($item8->getTitle());
+    $this->assertResponse(200);
+
+    // Check invalid menu link parents.
+    $this->checkInvalidParentMenuLinks();
+
+    // Save menu links for later tests.
+    $this->items[] = $item1;
+    $this->items[] = $item2;
+  }
+
+  /**
+   * Ensures that the proper default values are set when adding a menu link
+   */
+  protected function doMenuLinkFormDefaultsTest() {
+    $this->drupalGet("admin/structure/menu/manage/tools/add");
+    $this->assertResponse(200);
+
+    $this->assertFieldByName('title[0][value]', '');
+    $this->assertFieldByName('link[0][uri]', '');
+
+    $this->assertNoFieldChecked('edit-expanded-value');
+    $this->assertFieldChecked('edit-enabled-value');
+
+    $this->assertFieldByName('description[0][value]', '');
+    $this->assertFieldByName('weight[0][value]', 0);
+  }
+
+  /**
+   * Adds and removes a menu link with a query string and fragment.
+   */
+  public function testMenuQueryAndFragment() {
+    $this->drupalLogin($this->adminUser);
+
+    // Make a path with query and fragment on.
+    $path = '/test-page?arg1=value1&arg2=value2';
+    $item = $this->addMenuLink('', $path);
+
+    $this->drupalGet('admin/structure/menu/item/' . $item->id() . '/edit');
+    $this->assertFieldByName('link[0][uri]', $path, 'Path is found with both query and fragment.');
+
+    // Now change the path to something without query and fragment.
+    $path = '/test-page';
+    $this->drupalPostForm('admin/structure/menu/item/' . $item->id() . '/edit', ['link[0][uri]' => $path], t('Save'));
+    $this->drupalGet('admin/structure/menu/item/' . $item->id() . '/edit');
+    $this->assertFieldByName('link[0][uri]', $path, 'Path no longer has query or fragment.');
+
+    // Use <front>#fragment and ensure that saving it does not lose its content.
+    $path = '<front>?arg1=value#fragment';
+    $item = $this->addMenuLink('', $path);
+
+    $this->drupalGet('admin/structure/menu/item/' . $item->id() . '/edit');
+    $this->assertFieldByName('link[0][uri]', $path, 'Path is found with both query and fragment.');
+
+    $this->drupalPostForm('admin/structure/menu/item/' . $item->id() . '/edit', [], t('Save'));
+
+    $this->drupalGet('admin/structure/menu/item/' . $item->id() . '/edit');
+    $this->assertFieldByName('link[0][uri]', $path, 'Path is found with both query and fragment.');
+  }
+
+  /**
+   * Tests renaming the built-in menu.
+   */
+  public function testSystemMenuRename() {
+    $this->drupalLogin($this->adminUser);
+    $edit = [
+      'label' => $this->randomMachineName(16),
+    ];
+    $this->drupalPostForm('admin/structure/menu/manage/main', $edit, t('Save'));
+
+    // Make sure menu shows up with new name in block addition.
+    $default_theme = $this->config('system.theme')->get('default');
+    $this->drupalget('admin/structure/block/list/' . $default_theme);
+    $this->clickLinkPartialName('Place block');
+    $this->assertText($edit['label']);
+  }
+
+  /**
+   * Tests that menu items pointing to unpublished nodes are editable.
+   */
+  public function testUnpublishedNodeMenuItem() {
+    $this->drupalLogin($this->drupalCreateUser(['access administration pages', 'administer blocks', 'administer menu', 'create article content', 'bypass node access']));
+    // Create an unpublished node.
+    $node = $this->drupalCreateNode([
+      'type' => 'article',
+      'status' => NodeInterface::NOT_PUBLISHED,
+    ]);
+
+    $item = $this->addMenuLink('', '/node/' . $node->id());
+    $this->modifyMenuLink($item);
+
+    // Test that a user with 'administer menu' but without 'bypass node access'
+    // cannot see the menu item.
+    $this->drupalLogout();
+    $this->drupalLogin($this->adminUser);
+    $this->drupalGet('admin/structure/menu/manage/' . $item->getMenuName());
+    $this->assertNoText($item->getTitle(), "Menu link pointing to unpublished node is only visible to users with 'bypass node access' permission");
+    // The cache contexts associated with the (in)accessible menu links are
+    // bubbled. See DefaultMenuLinkTreeManipulators::menuLinkCheckAccess().
+    $this->assertCacheContext('user.permissions');
+  }
+
+  /**
+   * Tests the contextual links on a menu block.
+   */
+  public function testBlockContextualLinks() {
+    $this->drupalLogin($this->drupalCreateUser(['administer menu', 'access contextual links', 'administer blocks']));
+    $custom_menu = $this->addCustomMenu();
+    $this->addMenuLink('', '/', $custom_menu->id());
+    $block = $this->drupalPlaceBlock('system_menu_block:' . $custom_menu->id(), ['label' => 'Custom menu', 'provider' => 'system']);
+    $this->drupalGet('test-page');
+
+    $id = 'block:block=' . $block->id() . ':langcode=en|menu:menu=' . $custom_menu->id() . ':langcode=en';
+    // @see \Drupal\contextual\Tests\ContextualDynamicContextTest:assertContextualLinkPlaceHolder()
+    $this->assertRaw('<div data-contextual-id="' . $id . '"></div>', format_string('Contextual link placeholder with id @id exists.', ['@id' => $id]));
+
+    // Get server-rendered contextual links.
+    // @see \Drupal\contextual\Tests\ContextualDynamicContextTest:renderContextualLinks()
+    $post = ['ids[0]' => $id];
+    $response = $this->drupalPost('contextual/render', 'application/json', $post, ['query' => ['destination' => 'test-page']]);
+    $this->assertResponse(200);
+    $json = Json::decode($response);
+    $this->assertIdentical($json[$id], '<ul class="contextual-links"><li class="block-configure"><a href="' . base_path() . 'admin/structure/block/manage/' . $block->id() . '">Configure block</a></li><li class="entitymenuedit-form"><a href="' . base_path() . 'admin/structure/menu/manage/' . $custom_menu->id() . '">Edit menu</a></li></ul>');
+  }
+
+  /**
+   * Adds a menu link using the UI.
+   *
+   * @param string $parent
+   *   Optional parent menu link id.
+   * @param string $path
+   *   The path to enter on the form. Defaults to the front page.
+   * @param string $menu_name
+   *   Menu name. Defaults to 'tools'.
+   * @param bool $expanded
+   *   Whether or not this menu link is expanded. Setting this to TRUE should
+   *   test whether it works when we do the authenticatedUser tests. Defaults
+   *   to FALSE.
+   * @param string $weight
+   *   Menu weight. Defaults to 0.
+   *
+   * @return \Drupal\menu_link_content\Entity\MenuLinkContent
+   *   A menu link entity.
+   */
+  public function addMenuLink($parent = '', $path = '/', $menu_name = 'tools', $expanded = FALSE, $weight = '0') {
+    // View add menu link page.
+    $this->drupalGet("admin/structure/menu/manage/$menu_name/add");
+    $this->assertResponse(200);
+
+    $title = '!link_' . $this->randomMachineName(16);
+    $edit = [
+      'link[0][uri]' => $path,
+      'title[0][value]' => $title,
+      'description[0][value]' => '',
+      'enabled[value]' => 1,
+      'expanded[value]' => $expanded,
+      'menu_parent' => $menu_name . ':' . $parent,
+      'weight[0][value]' => $weight,
+    ];
+
+    // Add menu link.
+    $this->drupalPostForm(NULL, $edit, t('Save'));
+    $this->assertResponse(200);
+    $this->assertText('The menu link has been saved.');
+
+    $menu_links = entity_load_multiple_by_properties('menu_link_content', ['title' => $title]);
+
+    $menu_link = reset($menu_links);
+    $this->assertTrue($menu_link, 'Menu link was found in database.');
+    $this->assertMenuLink($menu_link->getPluginId(), ['menu_name' => $menu_name, 'children' => [], 'parent' => $parent]);
+
+    return $menu_link;
+  }
+
+  /**
+   * Attempts to add menu link with invalid path or no access permission.
+   */
+  public function addInvalidMenuLink() {
+    foreach (['access' => '/admin/people/permissions'] as $type => $link_path) {
+      $edit = [
+        'link[0][uri]' => $link_path,
+        'title[0][value]' => 'title',
+      ];
+      $this->drupalPostForm("admin/structure/menu/manage/{$this->menu->id()}/add", $edit, t('Save'));
+      $this->assertRaw(t("The path '@link_path' is inaccessible.", ['@link_path' => $link_path]), 'Menu link was not created');
+    }
+  }
+
+  /**
+   * Tests that parent options are limited by depth when adding menu links.
+   */
+  public function checkInvalidParentMenuLinks() {
+    $last_link = NULL;
+    $created_links = [];
+
+    // Get the max depth of the tree.
+    $menu_link_tree = \Drupal::service('menu.link_tree');
+    $max_depth = $menu_link_tree->maxDepth();
+
+    // Create a maximum number of menu links, each a child of the previous.
+    for ($i = 0; $i <= $max_depth - 1; $i++) {
+      $parent = $last_link ? 'tools:' . $last_link->getPluginId() : 'tools:';
+      $title = 'title' . $i;
+      $edit = [
+        'link[0][uri]' => '/',
+        'title[0][value]' => $title,
+        'menu_parent' => $parent,
+        'description[0][value]' => '',
+        'enabled[value]' => 1,
+        'expanded[value]' => FALSE,
+        'weight[0][value]' => '0',
+      ];
+      $this->drupalPostForm("admin/structure/menu/manage/{$this->menu->id()}/add", $edit, t('Save'));
+      $menu_links = entity_load_multiple_by_properties('menu_link_content', ['title' => $title]);
+      $last_link = reset($menu_links);
+      $created_links[]  = 'tools:' . $last_link->getPluginId();
+    }
+
+    // The last link cannot be a parent in the new menu link form.
+    $this->drupalGet('admin/structure/menu/manage/admin/add');
+    $value = 'tools:' . $last_link->getPluginId();
+    $this->assertNoOption('edit-menu-parent', $value, 'The invalid option is not there.');
+
+    // All but the last link can be parents in the new menu link form.
+    array_pop($created_links);
+    foreach ($created_links as $key => $link) {
+      $this->assertOption('edit-menu-parent', $link, 'The valid option number ' . ($key + 1) . ' is there.');
+    }
+  }
+
+  /**
+   * Verifies a menu link using the UI.
+   *
+   * @param \Drupal\menu_link_content\Entity\MenuLinkContent $item
+   *   Menu link.
+   * @param object $item_node
+   *   Menu link content node.
+   * @param \Drupal\menu_link_content\Entity\MenuLinkContent $parent
+   *   Parent menu link.
+   * @param object $parent_node
+   *   Parent menu link content node.
+   */
+  public function verifyMenuLink(MenuLinkContent $item, $item_node, MenuLinkContent $parent = NULL, $parent_node = NULL) {
+    // View home page.
+    $this->drupalGet('');
+    $this->assertResponse(200);
+
+    // Verify parent menu link.
+    if (isset($parent)) {
+      // Verify menu link.
+      $title = $parent->getTitle();
+      $this->assertLink($title, 0, 'Parent menu link was displayed');
+
+      // Verify menu link link.
+      $this->clickLink($title);
+      $title = $parent_node->label();
+      $this->assertTitle(t("@title | Drupal", ['@title' => $title]), 'Parent menu link link target was correct');
+    }
+
+    // Verify menu link.
+    $title = $item->getTitle();
+    $this->assertLink($title, 0, 'Menu link was displayed');
+
+    // Verify menu link link.
+    $this->clickLink($title);
+    $title = $item_node->label();
+    $this->assertTitle(t("@title | Drupal", ['@title' => $title]), 'Menu link link target was correct');
+  }
+
+  /**
+   * Changes the parent of a menu link using the UI.
+   *
+   * @param \Drupal\menu_link_content\MenuLinkContentInterface $item
+   *   The menu link item to move.
+   * @param int $parent
+   *   The id of the new parent.
+   * @param string $menu_name
+   *   The menu the menu link will be moved to.
+   */
+  public function moveMenuLink(MenuLinkContent $item, $parent, $menu_name) {
+    $mlid = $item->id();
+
+    $edit = [
+      'menu_parent' => $menu_name . ':' . $parent,
+    ];
+    $this->drupalPostForm("admin/structure/menu/item/$mlid/edit", $edit, t('Save'));
+    $this->assertResponse(200);
+  }
+
+  /**
+   * Modifies a menu link using the UI.
+   *
+   * @param \Drupal\menu_link_content\Entity\MenuLinkContent $item
+   *   Menu link entity.
+   */
+  public function modifyMenuLink(MenuLinkContent $item) {
+    $item->title->value = $this->randomMachineName(16);
+
+    $mlid = $item->id();
+    $title = $item->getTitle();
+
+    // Edit menu link.
+    $edit = [];
+    $edit['title[0][value]'] = $title;
+    $this->drupalPostForm("admin/structure/menu/item/$mlid/edit", $edit, t('Save'));
+    $this->assertResponse(200);
+    $this->assertText('The menu link has been saved.');
+    // Verify menu link.
+    $this->drupalGet('admin/structure/menu/manage/' . $item->getMenuName());
+    $this->assertText($title, 'Menu link was edited');
+  }
+
+  /**
+   * Resets a standard menu link using the UI.
+   *
+   * @param \Drupal\Core\Menu\MenuLinkInterface $menu_link
+   *   The Menu link.
+   * @param int $old_weight
+   *   Original title for menu link.
+   */
+  public function resetMenuLink(MenuLinkInterface $menu_link, $old_weight) {
+    // Reset menu link.
+    $this->drupalPostForm("admin/structure/menu/link/{$menu_link->getPluginId()}/reset", [], t('Reset'));
+    $this->assertResponse(200);
+    $this->assertRaw(t('The menu link was reset to its default settings.'), 'Menu link was reset');
+
+    // Verify menu link.
+    $instance = \Drupal::service('plugin.manager.menu.link')->createInstance($menu_link->getPluginId());
+    $this->assertEqual($old_weight, $instance->getWeight(), 'Resets to the old weight.');
+  }
+
+  /**
+   * Deletes a menu link using the UI.
+   *
+   * @param \Drupal\menu_link_content\Entity\MenuLinkContent $item
+   *   Menu link.
+   */
+  public function deleteMenuLink(MenuLinkContent $item) {
+    $mlid = $item->id();
+    $title = $item->getTitle();
+
+    // Delete menu link.
+    $this->drupalPostForm("admin/structure/menu/item/$mlid/delete", [], t('Delete'));
+    $this->assertResponse(200);
+    $this->assertRaw(t('The menu link %title has been deleted.', ['%title' => $title]), 'Menu link was deleted');
+
+    // Verify deletion.
+    $this->drupalGet('');
+    $this->assertNoText($title, 'Menu link was deleted');
+  }
+
+  /**
+   * Alternately disables and enables a menu link.
+   *
+   * @param \Drupal\menu_link_content\Entity\MenuLinkContent $item
+   *   Menu link.
+   */
+  public function toggleMenuLink(MenuLinkContent $item) {
+    $this->disableMenuLink($item);
+
+    // Verify menu link is absent.
+    $this->drupalGet('');
+    $this->assertNoText($item->getTitle(), 'Menu link was not displayed');
+    $this->enableMenuLink($item);
+
+    // Verify menu link is displayed.
+    $this->drupalGet('');
+    $this->assertText($item->getTitle(), 'Menu link was displayed');
+  }
+
+  /**
+   * Disables a menu link.
+   *
+   * @param \Drupal\menu_link_content\Entity\MenuLinkContent $item
+   *   Menu link.
+   */
+  public function disableMenuLink(MenuLinkContent $item) {
+    $mlid = $item->id();
+    $edit['enabled[value]'] = FALSE;
+    $this->drupalPostForm("admin/structure/menu/item/$mlid/edit", $edit, t('Save'));
+
+    // Unlike most other modules, there is no confirmation message displayed.
+    // Verify in the database.
+    $this->assertMenuLink($item->getPluginId(), ['enabled' => 0]);
+  }
+
+  /**
+   * Enables a menu link.
+   *
+   * @param \Drupal\menu_link_content\Entity\MenuLinkContent $item
+   *   Menu link.
+   */
+  public function enableMenuLink(MenuLinkContent $item) {
+    $mlid = $item->id();
+    $edit['enabled[value]'] = TRUE;
+    $this->drupalPostForm("admin/structure/menu/item/$mlid/edit", $edit, t('Save'));
+
+    // Verify in the database.
+    $this->assertMenuLink($item->getPluginId(), ['enabled' => 1]);
+  }
+
+  /**
+   * Tests if administrative users other than user 1 can access the menu parents
+   * AJAX callback.
+   */
+  public function testMenuParentsJsAccess() {
+    $admin = $this->drupalCreateUser(['administer menu']);
+    $this->drupalLogin($admin);
+    // Just check access to the callback overall, the POST data is irrelevant.
+    $this->drupalGetAjax('admin/structure/menu/parents');
+    $this->assertResponse(200);
+
+    // Do standard user tests.
+    // Log in the user.
+    $this->drupalLogin($this->authenticatedUser);
+    $this->drupalGetAjax('admin/structure/menu/parents');
+    $this->assertResponse(403);
+  }
+
+  /**
+   * Returns standard menu link.
+   *
+   * @return \Drupal\Core\Menu\MenuLinkInterface
+   *   A menu link plugin.
+   */
+  private function getStandardMenuLink() {
+    // Retrieve menu link id of the Log out menu link, which will always be on
+    // the front page.
+    /** @var \Drupal\Core\Menu\MenuLinkManagerInterface $menu_link_manager */
+    $menu_link_manager = \Drupal::service('plugin.manager.menu.link');
+    $instance = $menu_link_manager->getInstance(['id' => 'user.logout']);
+
+    $this->assertTrue((bool) $instance, 'Standard menu link was loaded');
+    return $instance;
+  }
+
+  /**
+   * Verifies the logged in user has the desired access to various menu pages.
+   *
+   * @param int $response
+   *   (optional) The expected HTTP response code. Defaults to 200.
+   */
+  private function verifyAccess($response = 200) {
+    // View menu help page.
+    $this->drupalGet('admin/help/menu');
+    $this->assertResponse($response);
+    if ($response == 200) {
+      $this->assertText(t('Menu'), 'Menu help was displayed');
+    }
+
+    // View menu build overview page.
+    $this->drupalGet('admin/structure/menu');
+    $this->assertResponse($response);
+    if ($response == 200) {
+      $this->assertText(t('Menus'), 'Menu build overview page was displayed');
+    }
+
+    // View tools menu customization page.
+    $this->drupalGet('admin/structure/menu/manage/' . $this->menu->id());
+    $this->assertResponse($response);
+    if ($response == 200) {
+      $this->assertText(t('Tools'), 'Tools menu page was displayed');
+    }
+
+    // View menu edit page for a static link.
+    $item = $this->getStandardMenuLink();
+    $this->drupalGet('admin/structure/menu/link/' . $item->getPluginId() . '/edit');
+    $this->assertResponse($response);
+    if ($response == 200) {
+      $this->assertText(t('Edit menu item'), 'Menu edit page was displayed');
+    }
+
+    // View add menu page.
+    $this->drupalGet('admin/structure/menu/add');
+    $this->assertResponse($response);
+    if ($response == 200) {
+      $this->assertText(t('Menus'), 'Add menu page was displayed');
+    }
+  }
+
+  /**
+   * Tests menu block settings.
+   */
+  protected function doTestMenuBlock() {
+    $menu_id = $this->menu->id();
+    $block_id = $this->blockPlacements[$menu_id];
+    $this->drupalGet('admin/structure/block/manage/' . $block_id);
+    $this->drupalPostForm(NULL, [
+      'settings[depth]' => 3,
+      'settings[level]' => 2,
+    ], t('Save block'));
+    $block = Block::load($block_id);
+    $settings = $block->getPlugin()->getConfiguration();
+    $this->assertEqual($settings['depth'], 3);
+    $this->assertEqual($settings['level'], 2);
+    // Reset settings.
+    $block->getPlugin()->setConfigurationValue('depth', 0);
+    $block->getPlugin()->setConfigurationValue('level', 1);
+    $block->save();
+  }
+
+}
diff --git a/core/modules/menu_ui/tests/src/Functional/MenuWebTestBase.php b/core/modules/menu_ui/tests/src/Functional/MenuWebTestBase.php
new file mode 100644
index 0000000..f78f66a
--- /dev/null
+++ b/core/modules/menu_ui/tests/src/Functional/MenuWebTestBase.php
@@ -0,0 +1,77 @@
+<?php
+
+namespace Drupal\Tests\menu_ui\Functional;
+
+use Drupal\simpletest\WebTestBase;
+
+/**
+ * Base class for menu web tests.
+ */
+abstract class MenuWebTestBase extends BrowserTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = ['menu_ui', 'menu_link_content'];
+
+  /**
+   * Fetches the menu item from the database and compares it to expected item.
+   *
+   * @param int $menu_plugin_id
+   *   Menu item id.
+   * @param array $expected_item
+   *   Array containing properties to verify.
+   */
+  public function assertMenuLink($menu_plugin_id, array $expected_item) {
+    // Retrieve menu link.
+    /** @var \Drupal\Core\Menu\MenuLinkManagerInterface $menu_link_manager */
+    $menu_link_manager = \Drupal::service('plugin.manager.menu.link');
+    $menu_link_manager->resetDefinitions();
+    // Reset the static load cache.
+    \Drupal::entityManager()->getStorage('menu_link_content')->resetCache();
+    $definition = $menu_link_manager->getDefinition($menu_plugin_id);
+
+    $entity = NULL;
+
+    // Pull the path from the menu link content.
+    if (strpos($menu_plugin_id, 'menu_link_content') === 0) {
+      list(, $uuid) = explode(':', $menu_plugin_id, 2);
+      /** @var \Drupal\menu_link_content\Entity\MenuLinkContent $entity */
+      $entity = \Drupal::entityManager()->loadEntityByUuid('menu_link_content', $uuid);
+    }
+
+    if (isset($expected_item['children'])) {
+      $child_ids = array_values($menu_link_manager->getChildIds($menu_plugin_id));
+      sort($expected_item['children']);
+      if ($child_ids) {
+        sort($child_ids);
+      }
+      $this->assertEqual($expected_item['children'], $child_ids);
+      unset($expected_item['children']);
+    }
+
+    if (isset($expected_item['parents'])) {
+      $parent_ids = array_values($menu_link_manager->getParentIds($menu_plugin_id));
+      $this->assertEqual($expected_item['parents'], $parent_ids);
+      unset($expected_item['parents']);
+    }
+
+    if (isset($expected_item['langcode']) && $entity) {
+      $this->assertEqual($entity->langcode->value, $expected_item['langcode']);
+      unset($expected_item['langcode']);
+    }
+
+    if (isset($expected_item['enabled']) && $entity) {
+      $this->assertEqual($entity->enabled->value, $expected_item['enabled']);
+      unset($expected_item['enabled']);
+    }
+
+    foreach ($expected_item as $key => $value) {
+      $this->assertTrue(isset($definition[$key]));
+      $this->assertEqual($definition[$key], $value);
+    }
+  }
+
+}
diff --git a/core/modules/menu_ui/tests/src/Functional/browsertest-menu_ui-2870452-1.patch b/core/modules/menu_ui/tests/src/Functional/browsertest-menu_ui-2870452-1.patch
new file mode 100644
index 0000000..18b97df
--- /dev/null
+++ b/core/modules/menu_ui/tests/src/Functional/browsertest-menu_ui-2870452-1.patch
@@ -0,0 +1,691 @@
+diff --git a/core/modules/menu_ui/src/Tests/MenuNodeTest.php b/core/modules/menu_ui/src/Tests/MenuNodeTest.php
+deleted file mode 100644
+index 3f1bba0..0000000
+--- a/core/modules/menu_ui/src/Tests/MenuNodeTest.php
++++ /dev/null
+@@ -1,341 +0,0 @@
+-<?php
+-
+-namespace Drupal\menu_ui\Tests;
+-
+-use Drupal\simpletest\WebTestBase;
+-use Drupal\language\Entity\ConfigurableLanguage;
+-use Drupal\menu_link_content\Entity\MenuLinkContent;
+-use Drupal\node\Entity\Node;
+-
+-/**
+- * Add, edit, and delete a node with menu link.
+- *
+- * @group menu_ui
+- */
+-class MenuNodeTest extends WebTestBase {
+-
+-  /**
+-   * An editor user.
+-   *
+-   * @var \Drupal\user\UserInterface
+-   */
+-  protected $editor;
+-
+-  /**
+-   * Modules to enable.
+-   *
+-   * @var array
+-   */
+-  public static $modules = ['menu_ui', 'test_page_test', 'node', 'block', 'locale', 'language', 'content_translation'];
+-
+-  protected function setUp() {
+-    parent::setUp();
+-
+-    $this->drupalPlaceBlock('system_menu_block:main');
+-    $this->drupalPlaceBlock('page_title_block');
+-
+-    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
+-
+-    $this->editor = $this->drupalCreateUser([
+-      'access administration pages',
+-      'administer content types',
+-      'administer menu',
+-      'create page content',
+-      'edit any page content',
+-      'delete any page content',
+-      'create content translations',
+-      'update content translations',
+-      'delete content translations',
+-      'translate any entity',
+-    ]);
+-    $this->drupalLogin($this->editor);
+-  }
+-
+-  /**
+-   * Test creating, editing, deleting menu links via node form widget.
+-   */
+-  public function testMenuNodeFormWidget() {
+-    // Verify that cacheability metadata is bubbled from the menu link tree
+-    // access checking that is performed when determining the "default parent
+-    // item" options in menu_ui_form_node_type_form_alter(). The "log out" link
+-    // adds the "user.roles:authenticated" cache context.
+-    $this->drupalGet('admin/structure/types/manage/page');
+-    $this->assertCacheContext('user.roles:authenticated');
+-
+-    // Verify that the menu link title has the correct maxlength.
+-    $max_length = \Drupal::entityManager()->getBaseFieldDefinitions('menu_link_content')['title']->getSetting('max_length');
+-    $this->drupalGet('node/add/page');
+-    $this->assertPattern('/<input .* id="edit-menu-title" .* maxlength="' . $max_length . '" .* \/>/', 'Menu link title field has correct maxlength in node add form.');
+-
+-    // Disable the default main menu, so that no menus are enabled.
+-    $edit = [
+-      'menu_options[main]' => FALSE,
+-    ];
+-    $this->drupalPostForm('admin/structure/types/manage/page', $edit, t('Save content type'));
+-
+-    // Verify that no menu settings are displayed and nodes can be created.
+-    $this->drupalGet('node/add/page');
+-    $this->assertText(t('Create Basic page'));
+-    $this->assertNoText(t('Menu settings'));
+-    $node_title = $this->randomMachineName();
+-    $edit = [
+-      'title[0][value]' => $node_title,
+-      'body[0][value]' => $this->randomString(),
+-    ];
+-    $this->drupalPostForm(NULL, $edit, t('Save'));
+-    $node = $this->drupalGetNodeByTitle($node_title);
+-    $this->assertEqual($node->getTitle(), $edit['title[0][value]']);
+-
+-    // Test that we cannot set a menu item from a menu that is not set as
+-    // available.
+-    $edit = [
+-      'menu_options[tools]' => 1,
+-      'menu_parent' => 'main:',
+-    ];
+-    $this->drupalPostForm('admin/structure/types/manage/page', $edit, t('Save content type'));
+-    $this->assertText(t('The selected menu item is not under one of the selected menus.'));
+-    $this->assertNoRaw(t('The content type %name has been updated.', ['%name' => 'Basic page']));
+-
+-    // Enable Tools menu as available menu.
+-    $edit = [
+-      'menu_options[main]' => 1,
+-      'menu_options[tools]' => 1,
+-      'menu_parent' => 'main:',
+-    ];
+-    $this->drupalPostForm('admin/structure/types/manage/page', $edit, t('Save content type'));
+-    $this->assertRaw(t('The content type %name has been updated.', ['%name' => 'Basic page']));
+-
+-    // Test that we can preview a node that will create a menu item.
+-    $edit = [
+-      'title[0][value]' => $node_title,
+-      'menu[enabled]' => 1,
+-      'menu[title]' => 'Test preview',
+-    ];
+-    $this->drupalPostForm('node/add/page', $edit, t('Preview'));
+-
+-    // Create a node.
+-    $node_title = $this->randomMachineName();
+-    $edit = [
+-      'title[0][value]' => $node_title,
+-      'body[0][value]' => $this->randomString(),
+-    ];
+-    $this->drupalPostForm('node/add/page', $edit, t('Save'));
+-    $node = $this->drupalGetNodeByTitle($node_title);
+-    // Assert that there is no link for the node.
+-    $this->drupalGet('test-page');
+-    $this->assertNoLink($node_title);
+-
+-    // Edit the node, enable the menu link setting, but skip the link title.
+-    $edit = [
+-      'menu[enabled]' => 1,
+-    ];
+-    $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
+-    // Assert that there is no link for the node.
+-    $this->drupalGet('test-page');
+-    $this->assertNoLink($node_title);
+-
+-    // Use not only the save button, but also the two special buttons:
+-    // 'Save and publish' as well as 'Save and keep published'.
+-    // These buttons just appear for 'administer nodes' users.
+-    $admin_user = $this->drupalCreateUser([
+-      'access administration pages',
+-      'administer content types',
+-      'administer nodes',
+-      'administer menu',
+-      'create page content',
+-      'edit any page content',
+-    ]);
+-    $this->drupalLogin($admin_user);
+-    foreach (['Save and unpublish' => FALSE, 'Save and keep unpublished' => FALSE, 'Save and publish' => TRUE, 'Save and keep published' => TRUE] as $submit => $visible) {
+-      $edit = [
+-        'menu[enabled]' => 1,
+-        'menu[title]' => $node_title,
+-      ];
+-      $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, $submit);
+-      // Assert that the link exists.
+-      $this->drupalGet('test-page');
+-      if ($visible) {
+-        $this->assertLink($node_title, 0, 'Found a menu link after submitted with ' . $submit);
+-      }
+-      else {
+-        $this->assertNoLink($node_title, 'Found no menu link after submitted with ' . $submit);
+-      }
+-    }
+-
+-    // Log back in as normal user.
+-    $this->drupalLogin($this->editor);
+-    // Edit the node and create a menu link.
+-    $edit = [
+-      'menu[enabled]' => 1,
+-      'menu[title]' => $node_title,
+-      'menu[weight]' => 17,
+-    ];
+-    $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
+-    // Assert that the link exists.
+-    $this->drupalGet('test-page');
+-    $this->assertLink($node_title);
+-
+-    $this->drupalGet('node/' . $node->id() . '/edit');
+-    $this->assertFieldById('edit-menu-weight', 17, 'Menu weight correct in edit form');
+-    $this->assertPattern('/<input .* id="edit-menu-title" .* maxlength="' . $max_length . '" .* \/>/', 'Menu link title field has correct maxlength in node edit form.');
+-
+-    // Disable the menu link, then edit the node--the link should stay disabled.
+-    $link_id = menu_ui_get_menu_link_defaults($node)['entity_id'];
+-    /** @var \Drupal\menu_link_content\Entity\MenuLinkContent $link */
+-    $link = MenuLinkContent::load($link_id);
+-    $link->set('enabled', FALSE);
+-    $link->save();
+-    $this->drupalPostForm($node->urlInfo('edit-form'), $edit, t('Save'));
+-    $link = MenuLinkContent::load($link_id);
+-    $this->assertFalse($link->isEnabled(), 'Saving a node with a disabled menu link keeps the menu link disabled.');
+-
+-    // Edit the node and remove the menu link.
+-    $edit = [
+-      'menu[enabled]' => FALSE,
+-    ];
+-    $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
+-    // Assert that there is no link for the node.
+-    $this->drupalGet('test-page');
+-    $this->assertNoLink($node_title);
+-
+-    // Add a menu link to the Administration menu.
+-    $item = MenuLinkContent::create([
+-      'link' => [['uri' => 'entity:node/' . $node->id()]],
+-      'title' => $this->randomMachineName(16),
+-      'menu_name' => 'admin',
+-    ]);
+-    $item->save();
+-
+-    // Assert that disabled Administration menu is not shown on the
+-    // node/$nid/edit page.
+-    $this->drupalGet('node/' . $node->id() . '/edit');
+-    $this->assertText('Provide a menu link', 'Link in not allowed menu not shown in node edit form');
+-    // Assert that the link is still in the Administration menu after save.
+-    $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
+-    $link = MenuLinkContent::load($item->id());
+-    $this->assertTrue($link, 'Link in not allowed menu still exists after saving node');
+-
+-    // Move the menu link back to the Tools menu.
+-    $item->menu_name->value = 'tools';
+-    $item->save();
+-    // Create a second node.
+-    $child_node = $this->drupalCreateNode(['type' => 'article']);
+-    // Assign a menu link to the second node, being a child of the first one.
+-    $child_item = MenuLinkContent::create([
+-      'link' => [['uri' => 'entity:node/' . $child_node->id()]],
+-      'title' => $this->randomMachineName(16),
+-      'parent' => $item->getPluginId(),
+-      'menu_name' => $item->getMenuName(),
+-    ]);
+-    $child_item->save();
+-    // Edit the first node.
+-    $this->drupalGet('node/' . $node->id() . '/edit');
+-    // Assert that it is not possible to set the parent of the first node to itself or the second node.
+-    $this->assertNoOption('edit-menu-menu-parent', 'tools:' . $item->getPluginId());
+-    $this->assertNoOption('edit-menu-menu-parent', 'tools:' . $child_item->getPluginId());
+-    // Assert that unallowed Administration menu is not available in options.
+-    $this->assertNoOption('edit-menu-menu-parent', 'admin:');
+-  }
+-
+-  /**
+-   * Testing correct loading and saving of menu links via node form widget in a multilingual environment.
+-   */
+-  public function testMultilingualMenuNodeFormWidget() {
+-    // Setup languages.
+-    $langcodes = ['de'];
+-    foreach ($langcodes as $langcode) {
+-      ConfigurableLanguage::createFromLangcode($langcode)->save();
+-    }
+-    array_unshift($langcodes, \Drupal::languageManager()->getDefaultLanguage()->getId());
+-
+-    $config = \Drupal::service('config.factory')->getEditable('language.negotiation');
+-    // Ensure path prefix is used to determine the language.
+-    $config->set('url.source', 'path_prefix');
+-    // Ensure that there's a path prefix set for english as well.
+-    $config->set('url.prefixes.' . $langcodes[0], $langcodes[0]);
+-    $config->save();
+-
+-    $this->rebuildContainer();
+-
+-    $languages = [];
+-    foreach ($langcodes as $langcode) {
+-      $languages[$langcode] = ConfigurableLanguage::load($langcode);
+-    }
+-
+-    // Use a UI form submission to make the node type and menu link content entity translatable.
+-    $this->drupalLogout();
+-    $this->drupalLogin($this->rootUser);
+-    $edit = [
+-      'entity_types[node]' => TRUE,
+-      'entity_types[menu_link_content]' => TRUE,
+-      'settings[node][page][settings][language][language_alterable]' => TRUE,
+-      'settings[node][page][translatable]' => TRUE,
+-      'settings[node][page][fields][title]' => TRUE,
+-      'settings[menu_link_content][menu_link_content][translatable]' => TRUE,
+-    ];
+-    $this->drupalPostForm('admin/config/regional/content-language', $edit, t('Save configuration'));
+-
+-    // Log out and back in as normal user.
+-    $this->drupalLogout();
+-    $this->drupalLogin($this->editor);
+-
+-    // Create a node.
+-    $node_title = $this->randomMachineName(8);
+-    $node = Node::create([
+-      'type' => 'page',
+-      'title' => $node_title,
+-      'body' => $this->randomMachineName(16),
+-      'uid' => $this->editor->id(),
+-      'status' => 1,
+-      'langcode' => $langcodes[0],
+-    ]);
+-    $node->save();
+-
+-    // Create translation.
+-    $translated_node_title = $this->randomMachineName(8);
+-    $node->addTranslation($langcodes[1], ['title' => $translated_node_title, 'body' => $this->randomMachineName(16), 'status' => 1]);
+-    $node->save();
+-
+-    // Edit the node and create a menu link.
+-    $edit = [
+-      'menu[enabled]' => 1,
+-      'menu[title]' => $node_title,
+-      'menu[weight]' => 17,
+-    ];
+-    $options = ['language' => $languages[$langcodes[0]]];
+-    $url = $node->toUrl('edit-form', $options);
+-    $this->drupalPostForm($url, $edit, t('Save') . ' ' . t('(this translation)'));
+-
+-    // Edit the node in a different language and translate the menu link.
+-    $edit = [
+-      'menu[enabled]' => 1,
+-      'menu[title]' => $translated_node_title,
+-      'menu[weight]' => 17,
+-    ];
+-    $options = ['language' => $languages[$langcodes[1]]];
+-    $url = $node->toUrl('edit-form', $options);
+-    $this->drupalPostForm($url, $edit, t('Save') . ' ' . t('(this translation)'));
+-
+-    // Assert that the original link exists in the frontend.
+-    $this->drupalGet('node/' . $node->id(), ['language' => $languages[$langcodes[0]]]);
+-    $this->assertLink($node_title);
+-
+-    // Assert that the translated link exists in the frontend.
+-    $this->drupalGet('node/' . $node->id(), ['language' => $languages[$langcodes[1]]]);
+-    $this->assertLink($translated_node_title);
+-
+-    // Revisit the edit page in original language, check the loaded menu item title and save.
+-    $options = ['language' => $languages[$langcodes[0]]];
+-    $url = $node->toUrl('edit-form', $options);
+-    $this->drupalGet($url);
+-    $this->assertFieldById('edit-menu-title', $node_title);
+-    $this->drupalPostForm(NULL, [], t('Save') . ' ' . t('(this translation)'));
+-
+-    // Revisit the edit page of the translation and check the loaded menu item title.
+-    $options = ['language' => $languages[$langcodes[1]]];
+-    $url = $node->toUrl('edit-form', $options);
+-    $this->drupalGet($url);
+-    $this->assertFieldById('edit-menu-title', $translated_node_title);
+-  }
+-
+-}
+diff --git a/core/modules/menu_ui/tests/src/Functional/MenuNodeTest.php b/core/modules/menu_ui/tests/src/Functional/MenuNodeTest.php
+new file mode 100644
+index 0000000..6c9a012
+--- /dev/null
++++ b/core/modules/menu_ui/tests/src/Functional/MenuNodeTest.php
+@@ -0,0 +1,338 @@
++<?php
++
++namespace Drupal\Tests\menu_ui\Functional;
++
++use Drupal\Tests\BrowserTestBase;
++
++/**
++ * Add, edit, and delete a node with menu link.
++ *
++ * @group menu_ui
++ */
++class MenuNodeTest extends BrowserTestBase {
++
++  /**
++   * An editor user.
++   *
++   * @var \Drupal\user\UserInterface
++   */
++  protected $editor;
++
++  /**
++   * Modules to enable.
++   *
++   * @var array
++   */
++  public static $modules = ['menu_ui', 'test_page_test', 'node', 'block', 'locale', 'language', 'content_translation'];
++
++  protected function setUp() {
++    parent::setUp();
++
++    $this->drupalPlaceBlock('system_menu_block:main');
++    $this->drupalPlaceBlock('page_title_block');
++
++    $this->drupalCreateContentType(['type' => 'page', 'name' => 'Basic page']);
++
++    $this->editor = $this->drupalCreateUser([
++      'access administration pages',
++      'administer content types',
++      'administer menu',
++      'create page content',
++      'edit any page content',
++      'delete any page content',
++      'create content translations',
++      'update content translations',
++      'delete content translations',
++      'translate any entity',
++    ]);
++    $this->drupalLogin($this->editor);
++  }
++
++  /**
++   * Test creating, editing, deleting menu links via node form widget.
++   */
++  public function testMenuNodeFormWidget() {
++    // Verify that cacheability metadata is bubbled from the menu link tree
++    // access checking that is performed when determining the "default parent
++    // item" options in menu_ui_form_node_type_form_alter(). The "log out" link
++    // adds the "user.roles:authenticated" cache context.
++    $this->drupalGet('admin/structure/types/manage/page');
++    $this->assertCacheContext('user.roles:authenticated');
++
++    // Verify that the menu link title has the correct maxlength.
++    $max_length = \Drupal::entityManager()->getBaseFieldDefinitions('menu_link_content')['title']->getSetting('max_length');
++    $this->drupalGet('node/add/page');
++    $this->assertPattern('/<input .* id="edit-menu-title" .* maxlength="' . $max_length . '" .* \/>/', 'Menu link title field has correct maxlength in node add form.');
++
++    // Disable the default main menu, so that no menus are enabled.
++    $edit = [
++      'menu_options[main]' => FALSE,
++    ];
++    $this->drupalPostForm('admin/structure/types/manage/page', $edit, t('Save content type'));
++
++    // Verify that no menu settings are displayed and nodes can be created.
++    $this->drupalGet('node/add/page');
++    $this->assertText(t('Create Basic page'));
++    $this->assertNoText(t('Menu settings'));
++    $node_title = $this->randomMachineName();
++    $edit = [
++      'title[0][value]' => $node_title,
++      'body[0][value]' => $this->randomString(),
++    ];
++    $this->drupalPostForm(NULL, $edit, t('Save'));
++    $node = $this->drupalGetNodeByTitle($node_title);
++    $this->assertEqual($node->getTitle(), $edit['title[0][value]']);
++
++    // Test that we cannot set a menu item from a menu that is not set as
++    // available.
++    $edit = [
++      'menu_options[tools]' => 1,
++      'menu_parent' => 'main:',
++    ];
++    $this->drupalPostForm('admin/structure/types/manage/page', $edit, t('Save content type'));
++    $this->assertText(t('The selected menu item is not under one of the selected menus.'));
++    $this->assertNoRaw(t('The content type %name has been updated.', ['%name' => 'Basic page']));
++
++    // Enable Tools menu as available menu.
++    $edit = [
++      'menu_options[main]' => 1,
++      'menu_options[tools]' => 1,
++      'menu_parent' => 'main:',
++    ];
++    $this->drupalPostForm('admin/structure/types/manage/page', $edit, t('Save content type'));
++    $this->assertRaw(t('The content type %name has been updated.', ['%name' => 'Basic page']));
++
++    // Test that we can preview a node that will create a menu item.
++    $edit = [
++      'title[0][value]' => $node_title,
++      'menu[enabled]' => 1,
++      'menu[title]' => 'Test preview',
++    ];
++    $this->drupalPostForm('node/add/page', $edit, t('Preview'));
++
++    // Create a node.
++    $node_title = $this->randomMachineName();
++    $edit = [
++      'title[0][value]' => $node_title,
++      'body[0][value]' => $this->randomString(),
++    ];
++    $this->drupalPostForm('node/add/page', $edit, t('Save'));
++    $node = $this->drupalGetNodeByTitle($node_title);
++    // Assert that there is no link for the node.
++    $this->drupalGet('test-page');
++    $this->assertNoLink($node_title);
++
++    // Edit the node, enable the menu link setting, but skip the link title.
++    $edit = [
++      'menu[enabled]' => 1,
++    ];
++    $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
++    // Assert that there is no link for the node.
++    $this->drupalGet('test-page');
++    $this->assertNoLink($node_title);
++
++    // Use not only the save button, but also the two special buttons:
++    // 'Save and publish' as well as 'Save and keep published'.
++    // These buttons just appear for 'administer nodes' users.
++    $admin_user = $this->drupalCreateUser([
++      'access administration pages',
++      'administer content types',
++      'administer nodes',
++      'administer menu',
++      'create page content',
++      'edit any page content',
++    ]);
++    $this->drupalLogin($admin_user);
++    foreach (['Save and unpublish' => FALSE, 'Save and keep unpublished' => FALSE, 'Save and publish' => TRUE, 'Save and keep published' => TRUE] as $submit => $visible) {
++      $edit = [
++        'menu[enabled]' => 1,
++        'menu[title]' => $node_title,
++      ];
++      $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, $submit);
++      // Assert that the link exists.
++      $this->drupalGet('test-page');
++      if ($visible) {
++        $this->assertLink($node_title, 0, 'Found a menu link after submitted with ' . $submit);
++      }
++      else {
++        $this->assertNoLink($node_title, 'Found no menu link after submitted with ' . $submit);
++      }
++    }
++
++    // Log back in as normal user.
++    $this->drupalLogin($this->editor);
++    // Edit the node and create a menu link.
++    $edit = [
++      'menu[enabled]' => 1,
++      'menu[title]' => $node_title,
++      'menu[weight]' => 17,
++    ];
++    $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
++    // Assert that the link exists.
++    $this->drupalGet('test-page');
++    $this->assertLink($node_title);
++
++    $this->drupalGet('node/' . $node->id() . '/edit');
++    $this->assertFieldById('edit-menu-weight', 17, 'Menu weight correct in edit form');
++    $this->assertPattern('/<input .* id="edit-menu-title" .* maxlength="' . $max_length . '" .* \/>/', 'Menu link title field has correct maxlength in node edit form.');
++
++    // Disable the menu link, then edit the node--the link should stay disabled.
++    $link_id = menu_ui_get_menu_link_defaults($node)['entity_id'];
++    /** @var \Drupal\menu_link_content\Entity\MenuLinkContent $link */
++    $link = MenuLinkContent::load($link_id);
++    $link->set('enabled', FALSE);
++    $link->save();
++    $this->drupalPostForm($node->urlInfo('edit-form'), $edit, t('Save'));
++    $link = MenuLinkContent::load($link_id);
++    $this->assertFalse($link->isEnabled(), 'Saving a node with a disabled menu link keeps the menu link disabled.');
++
++    // Edit the node and remove the menu link.
++    $edit = [
++      'menu[enabled]' => FALSE,
++    ];
++    $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
++    // Assert that there is no link for the node.
++    $this->drupalGet('test-page');
++    $this->assertNoLink($node_title);
++
++    // Add a menu link to the Administration menu.
++    $item = MenuLinkContent::create([
++      'link' => [['uri' => 'entity:node/' . $node->id()]],
++      'title' => $this->randomMachineName(16),
++      'menu_name' => 'admin',
++    ]);
++    $item->save();
++
++    // Assert that disabled Administration menu is not shown on the
++    // node/$nid/edit page.
++    $this->drupalGet('node/' . $node->id() . '/edit');
++    $this->assertText('Provide a menu link', 'Link in not allowed menu not shown in node edit form');
++    // Assert that the link is still in the Administration menu after save.
++    $this->drupalPostForm('node/' . $node->id() . '/edit', $edit, t('Save'));
++    $link = MenuLinkContent::load($item->id());
++    $this->assertTrue($link, 'Link in not allowed menu still exists after saving node');
++
++    // Move the menu link back to the Tools menu.
++    $item->menu_name->value = 'tools';
++    $item->save();
++    // Create a second node.
++    $child_node = $this->drupalCreateNode(['type' => 'article']);
++    // Assign a menu link to the second node, being a child of the first one.
++    $child_item = MenuLinkContent::create([
++      'link' => [['uri' => 'entity:node/' . $child_node->id()]],
++      'title' => $this->randomMachineName(16),
++      'parent' => $item->getPluginId(),
++      'menu_name' => $item->getMenuName(),
++    ]);
++    $child_item->save();
++    // Edit the first node.
++    $this->drupalGet('node/' . $node->id() . '/edit');
++    // Assert that it is not possible to set the parent of the first node to itself or the second node.
++    $this->assertNoOption('edit-menu-menu-parent', 'tools:' . $item->getPluginId());
++    $this->assertNoOption('edit-menu-menu-parent', 'tools:' . $child_item->getPluginId());
++    // Assert that unallowed Administration menu is not available in options.
++    $this->assertNoOption('edit-menu-menu-parent', 'admin:');
++  }
++
++  /**
++   * Testing correct loading and saving of menu links via node form widget in a multilingual environment.
++   */
++  public function testMultilingualMenuNodeFormWidget() {
++    // Setup languages.
++    $langcodes = ['de'];
++    foreach ($langcodes as $langcode) {
++      ConfigurableLanguage::createFromLangcode($langcode)->save();
++    }
++    array_unshift($langcodes, \Drupal::languageManager()->getDefaultLanguage()->getId());
++
++    $config = \Drupal::service('config.factory')->getEditable('language.negotiation');
++    // Ensure path prefix is used to determine the language.
++    $config->set('url.source', 'path_prefix');
++    // Ensure that there's a path prefix set for english as well.
++    $config->set('url.prefixes.' . $langcodes[0], $langcodes[0]);
++    $config->save();
++
++    $this->rebuildContainer();
++
++    $languages = [];
++    foreach ($langcodes as $langcode) {
++      $languages[$langcode] = ConfigurableLanguage::load($langcode);
++    }
++
++    // Use a UI form submission to make the node type and menu link content entity translatable.
++    $this->drupalLogout();
++    $this->drupalLogin($this->rootUser);
++    $edit = [
++      'entity_types[node]' => TRUE,
++      'entity_types[menu_link_content]' => TRUE,
++      'settings[node][page][settings][language][language_alterable]' => TRUE,
++      'settings[node][page][translatable]' => TRUE,
++      'settings[node][page][fields][title]' => TRUE,
++      'settings[menu_link_content][menu_link_content][translatable]' => TRUE,
++    ];
++    $this->drupalPostForm('admin/config/regional/content-language', $edit, t('Save configuration'));
++
++    // Log out and back in as normal user.
++    $this->drupalLogout();
++    $this->drupalLogin($this->editor);
++
++    // Create a node.
++    $node_title = $this->randomMachineName(8);
++    $node = Node::create([
++      'type' => 'page',
++      'title' => $node_title,
++      'body' => $this->randomMachineName(16),
++      'uid' => $this->editor->id(),
++      'status' => 1,
++      'langcode' => $langcodes[0],
++    ]);
++    $node->save();
++
++    // Create translation.
++    $translated_node_title = $this->randomMachineName(8);
++    $node->addTranslation($langcodes[1], ['title' => $translated_node_title, 'body' => $this->randomMachineName(16), 'status' => 1]);
++    $node->save();
++
++    // Edit the node and create a menu link.
++    $edit = [
++      'menu[enabled]' => 1,
++      'menu[title]' => $node_title,
++      'menu[weight]' => 17,
++    ];
++    $options = ['language' => $languages[$langcodes[0]]];
++    $url = $node->toUrl('edit-form', $options);
++    $this->drupalPostForm($url, $edit, t('Save') . ' ' . t('(this translation)'));
++
++    // Edit the node in a different language and translate the menu link.
++    $edit = [
++      'menu[enabled]' => 1,
++      'menu[title]' => $translated_node_title,
++      'menu[weight]' => 17,
++    ];
++    $options = ['language' => $languages[$langcodes[1]]];
++    $url = $node->toUrl('edit-form', $options);
++    $this->drupalPostForm($url, $edit, t('Save') . ' ' . t('(this translation)'));
++
++    // Assert that the original link exists in the frontend.
++    $this->drupalGet('node/' . $node->id(), ['language' => $languages[$langcodes[0]]]);
++    $this->assertLink($node_title);
++
++    // Assert that the translated link exists in the frontend.
++    $this->drupalGet('node/' . $node->id(), ['language' => $languages[$langcodes[1]]]);
++    $this->assertLink($translated_node_title);
++
++    // Revisit the edit page in original language, check the loaded menu item title and save.
++    $options = ['language' => $languages[$langcodes[0]]];
++    $url = $node->toUrl('edit-form', $options);
++    $this->drupalGet($url);
++    $this->assertFieldById('edit-menu-title', $node_title);
++    $this->drupalPostForm(NULL, [], t('Save') . ' ' . t('(this translation)'));
++
++    // Revisit the edit page of the translation and check the loaded menu item title.
++    $options = ['language' => $languages[$langcodes[1]]];
++    $url = $node->toUrl('edit-form', $options);
++    $this->drupalGet($url);
++    $this->assertFieldById('edit-menu-title', $translated_node_title);
++  }
++
++}