Update to Drupal 8.0.0 beta 14. For more information, see https://drupal.org/node/2544542

core/modules/system/src/Tests/Theme/EngineTwigTest.php

@@ -85,6 +85,7 @@ class EngineTwigTest extends WebTestBase {
       'link via the linkgenerator: ' . $link_generator->generate('register', new Url('user.register', [], ['absolute' => TRUE, 'attributes' => ['foo' => 'bar']])),
       'link via the linkgenerator: ' . $link_generator->generate('register', new Url('user.register', [], ['attributes' => ['foo' => 'bar', 'id' => 'kitten']])),
       'link via the linkgenerator: ' . $link_generator->generate('register', new Url('user.register', [], ['attributes' => ['id' => 'kitten']])),
+      'link via the linkgenerator: ' . $link_generator->generate('register', new Url('user.register', [], ['attributes' => ['class' => ['llama', 'kitten', 'panda']]])),
     ];
 
     // Verify that link() has the ability to bubble cacheability metadata:

core/modules/system/src/Tests/Theme/ThemeInfoTest.php

@@ -94,13 +94,13 @@ class ThemeInfoTest extends WebTestBase {
     $active_theme = $this->themeManager->getActiveTheme();
     // Make sure we are not testing the wrong theme.
     $this->assertEqual('test_theme', $active_theme->getName());
-    $this->assertEqual(['classy/base', 'test_theme/global-styling'], $active_theme->getLibraries());
+    $this->assertEqual(['classy/base', 'core/normalize', 'test_theme/global-styling'], $active_theme->getLibraries());
 
     // @see theme_test_system_info_alter()
     $this->state->set('theme_test.modify_info_files', TRUE);
     drupal_flush_all_caches();
     $active_theme = $this->themeManager->getActiveTheme();
-    $this->assertEqual(['classy/base', 'test_theme/global-styling', 'core/backbone'], $active_theme->getLibraries());
+    $this->assertEqual(['classy/base', 'core/normalize', 'test_theme/global-styling', 'core/backbone'], $active_theme->getLibraries());
   }
 
 }

core/modules/system/src/Tests/Theme/ThemeTokenTest.php

@@ -0,0 +1,60 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\system\Tests\Theme\ThemeTokenTest.
+ */
+
+namespace Drupal\system\Tests\Theme;
+
+use Drupal\simpletest\WebTestBase;
+
+/**
+ * Tests the generation of 'theme_token' key in Drupal settings.
+ *
+ * @group Theme
+ */
+class ThemeTokenTest extends WebTestBase {
+
+  /**
+   * We want to visit the 'admin/structure/block' page.
+   *
+   * @var array
+   */
+  static public $modules = ['block'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+    $account = $this->drupalCreateUser(['administer blocks', 'view the administration theme']);
+    $this->drupalLogin($account);
+  }
+
+  /**
+   * Tests if the 'theme_token' key of 'ajaxPageState' is computed.
+   */
+  public function testThemeToken() {
+    // Visit the block administrative page with default theme. We use that page
+    // because 'misc/ajax.js' is loaded there and we can test the token
+    // generation.
+    $this->drupalGet('admin/structure/block');
+    $settings = $this->getDrupalSettings();
+    $this->assertNull($settings['ajaxPageState']['theme_token']);
+
+    // Install 'seven' and configure it as administrative theme.
+    $this->container->get('theme_installer')->install(['seven']);
+    $this->config('system.theme')->set('admin', 'seven')->save();
+
+    // Revisit the page. This time the page is displayed using the 'seven' theme
+    // and that is different from the default theme ('classy').
+    $this->drupalGet('admin/structure/block');
+    $settings = $this->getDrupalSettings();
+    $this->assertNotNull($settings['ajaxPageState']['theme_token']);
+    // The CSRF token is a 43 length string.
+    $this->assertTrue(is_string($settings['ajaxPageState']['theme_token']));
+    $this->assertEqual(strlen($settings['ajaxPageState']['theme_token']), 43);
+  }
+
+}

core/modules/system/src/Tests/Theme/TwigEnvironmentTest.php

@@ -41,10 +41,10 @@ class TwigEnvironmentTest extends KernelTestBase {
     $unsafe_string = '<script>alert(\'Danger! High voltage!\');</script>';
     $element['test'] = array(
       '#type' => 'inline_template',
-      '#template' => 'test-with-context {{ unsafe_content }}',
+      '#template' => 'test-with-context <label>{{ unsafe_content }}</label>',
       '#context' => array('unsafe_content' => $unsafe_string),
     );
-    $this->assertEqual($renderer->renderRoot($element), 'test-with-context ' . SafeMarkup::checkPlain($unsafe_string));
+    $this->assertEqual($renderer->renderRoot($element), 'test-with-context <label>' . SafeMarkup::checkPlain($unsafe_string) . '</label>');
 
     // Enable twig_auto_reload and twig_debug.
     $settings = Settings::getAll();