Move into nested docroot

web/core/modules/ckeditor/tests/modules/ckeditor_test.info.yml

@@ -0,0 +1,6 @@
+name: CKEditor test
+type: module
+description: Support module for the CKEditor module tests.
+core: 8.x
+package: Testing
+version: VERSION

web/core/modules/ckeditor/tests/modules/ckeditor_test.module

@@ -0,0 +1,15 @@
+<?php
+
+/**
+ * @file
+ * Helper module for the CKEditor tests.
+ */
+
+use Drupal\editor\Entity\Editor;
+
+/**
+ * Implements hook_ckeditor_css_alter().
+ */
+function ckeditor_test_ckeditor_css_alter(array &$css, Editor $editor) {
+  $css[] = drupal_get_path('module', 'ckeditor_test') . '/ckeditor_test.css';
+}

web/core/modules/ckeditor/tests/modules/config/schema/ckeditor_test.schema.yml

@@ -0,0 +1,16 @@
+ckeditor.plugin.llama_contextual_and_button:
+  type: mapping
+  label: 'Contextual Llama With Button'
+  mapping:
+    ultra_llama_mode:
+      type: boolean
+      label: 'Ultra llama mode'
+
+filter_settings.test_attribute_filter:
+  type: filter
+  label: 'Test Attribute Filter'
+  mapping:
+    tags:
+      type: sequence
+      sequence:
+        type: string

web/core/modules/ckeditor/tests/modules/src/Kernel/CKEditorPluginManagerTest.php

@@ -0,0 +1,159 @@
+<?php
+
+namespace Drupal\Tests\ckeditor\Kernel;
+
+use Drupal\editor\Entity\Editor;
+use Drupal\KernelTests\KernelTestBase;
+use Drupal\filter\Entity\FilterFormat;
+
+/**
+ * Tests different ways of enabling CKEditor plugins.
+ *
+ * @group ckeditor
+ */
+class CKEditorPluginManagerTest extends KernelTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = array('system', 'user', 'filter', 'editor', 'ckeditor');
+
+  /**
+   * The manager for "CKEditor plugin" plugins.
+   *
+   * @var \Drupal\Component\Plugin\PluginManagerInterface
+   */
+  protected $manager;
+
+  protected function setUp() {
+    parent::setUp();
+
+    // Install the Filter module.
+
+    // Create text format, associate CKEditor.
+    $filtered_html_format = FilterFormat::create(array(
+      'format' => 'filtered_html',
+      'name' => 'Filtered HTML',
+      'weight' => 0,
+      'filters' => array(),
+    ));
+    $filtered_html_format->save();
+    $editor = Editor::create([
+      'format' => 'filtered_html',
+      'editor' => 'ckeditor',
+    ]);
+    $editor->save();
+  }
+
+  /**
+   * Tests the enabling of plugins.
+   */
+  function testEnabledPlugins() {
+    $this->manager = $this->container->get('plugin.manager.ckeditor.plugin');
+    $editor = Editor::load('filtered_html');
+
+    // Case 1: no CKEditor plugins.
+    $definitions = array_keys($this->manager->getDefinitions());
+    sort($definitions);
+    $this->assertIdentical(array('drupalimage', 'drupalimagecaption', 'drupallink', 'internal', 'language', 'stylescombo'), $definitions, 'No CKEditor plugins found besides the built-in ones.');
+    $enabled_plugins = array(
+      'drupalimage' => drupal_get_path('module', 'ckeditor') . '/js/plugins/drupalimage/plugin.js',
+      'drupallink' => drupal_get_path('module', 'ckeditor') . '/js/plugins/drupallink/plugin.js',
+    );
+    $this->assertIdentical($enabled_plugins, $this->manager->getEnabledPluginFiles($editor), 'Only built-in plugins are enabled.');
+    $this->assertIdentical(array('internal' => NULL) + $enabled_plugins, $this->manager->getEnabledPluginFiles($editor, TRUE), 'Only the "internal" plugin is enabled.');
+
+    // Enable the CKEditor Test module, which has the Llama plugin (plus four
+    // variations of it, to cover all possible ways a plugin can be enabled) and
+    // clear the editor manager's cache so it is picked up.
+    $this->enableModules(array('ckeditor_test'));
+    $this->manager = $this->container->get('plugin.manager.ckeditor.plugin');
+    $this->manager->clearCachedDefinitions();
+
+    // Case 2: CKEditor plugins are available.
+    $plugin_ids = array_keys($this->manager->getDefinitions());
+    sort($plugin_ids);
+    $this->assertIdentical(array('drupalimage', 'drupalimagecaption', 'drupallink', 'internal', 'language', 'llama', 'llama_button', 'llama_contextual', 'llama_contextual_and_button', 'llama_css', 'stylescombo'), $plugin_ids, 'Additional CKEditor plugins found.');
+    $this->assertIdentical($enabled_plugins, $this->manager->getEnabledPluginFiles($editor), 'Only the internal plugins are enabled.');
+    $this->assertIdentical(array('internal' => NULL) + $enabled_plugins, $this->manager->getEnabledPluginFiles($editor, TRUE), 'Only the "internal" plugin is enabled.');
+
+    // Case 3: enable each of the newly available plugins, if possible:
+    // a. Llama: cannot be enabled, since it does not implement
+    //    CKEditorPluginContextualInterface nor CKEditorPluginButtonsInterface.
+    // b. LlamaContextual: enabled by adding the 'Strike' button, which is
+    //    part of another plugin!
+    // c. LlamaButton: automatically enabled by adding its 'Llama' button.
+    // d. LlamaContextualAndButton: enabled by either b or c.
+    // e. LlamaCSS: automatically enabled by add its 'LlamaCSS' button.
+    // Below, we will first enable the "Llama" button, which will cause the
+    // LlamaButton and LlamaContextualAndButton plugins to be enabled. Then we
+    // will remove the "Llama" button and add the "Strike" button, which will
+    // cause the LlamaContextual and LlamaContextualAndButton plugins to be
+    // enabled. Then we will add the "Strike" button back again, which would
+    // cause LlamaButton, LlamaContextual and LlamaContextualAndButton to be
+    // enabled. Finally, we will add the "LlamaCSS" button which would cause
+    // all four plugins to be enabled.
+    $settings = $editor->getSettings();
+    $original_toolbar = $settings['toolbar'];
+    $settings['toolbar']['rows'][0][0]['items'][] = 'Llama';
+    $editor->setSettings($settings);
+    $editor->save();
+    $file = array();
+    $file['b'] = drupal_get_path('module', 'ckeditor_test') . '/js/llama_button.js';
+    $file['c'] = drupal_get_path('module', 'ckeditor_test') . '/js/llama_contextual.js';
+    $file['cb'] = drupal_get_path('module', 'ckeditor_test') . '/js/llama_contextual_and_button.js';
+    $file['css'] = drupal_get_path('module', 'ckeditor_test') . '/js/llama_css.js';
+    $expected = $enabled_plugins + array('llama_button' => $file['b'], 'llama_contextual_and_button' => $file['cb']);
+    $this->assertIdentical($expected, $this->manager->getEnabledPluginFiles($editor), 'The LlamaButton and LlamaContextualAndButton plugins are enabled.');
+    $this->assertIdentical(array('internal' => NULL) + $expected, $this->manager->getEnabledPluginFiles($editor, TRUE), 'The LlamaButton and LlamaContextualAndButton plugins are enabled.');
+    $settings['toolbar'] = $original_toolbar;
+    $settings['toolbar']['rows'][0][0]['items'][] = 'Strike';
+    $editor->setSettings($settings);
+    $editor->save();
+    $expected = $enabled_plugins + array('llama_contextual' => $file['c'], 'llama_contextual_and_button' => $file['cb']);
+    $this->assertIdentical($expected, $this->manager->getEnabledPluginFiles($editor), 'The  LLamaContextual and LlamaContextualAndButton plugins are enabled.');
+    $this->assertIdentical(array('internal' => NULL) + $expected, $this->manager->getEnabledPluginFiles($editor, TRUE), 'The LlamaContextual and LlamaContextualAndButton plugins are enabled.');
+    $settings['toolbar']['rows'][0][0]['items'][] = 'Llama';
+    $editor->setSettings($settings);
+    $editor->save();
+    $expected = $enabled_plugins + array('llama_button' => $file['b'], 'llama_contextual' => $file['c'], 'llama_contextual_and_button' => $file['cb']);
+    $this->assertIdentical($expected, $this->manager->getEnabledPluginFiles($editor), 'The LlamaButton, LlamaContextual and LlamaContextualAndButton plugins are enabled.');
+    $this->assertIdentical(array('internal' => NULL) + $expected, $this->manager->getEnabledPluginFiles($editor, TRUE), 'The LLamaButton, LlamaContextual and LlamaContextualAndButton plugins are enabled.');
+    $settings['toolbar']['rows'][0][0]['items'][] = 'LlamaCSS';
+    $editor->setSettings($settings);
+    $editor->save();
+    $expected = $enabled_plugins + array('llama_button' => $file['b'], 'llama_contextual' => $file['c'], 'llama_contextual_and_button' => $file['cb'], 'llama_css' => $file['css']);
+    $this->assertIdentical($expected, $this->manager->getEnabledPluginFiles($editor), 'The LlamaButton, LlamaContextual, LlamaContextualAndButton and LlamaCSS plugins are enabled.');
+    $this->assertIdentical(array('internal' => NULL) + $expected, $this->manager->getEnabledPluginFiles($editor, TRUE), 'The LLamaButton, LlamaContextual, LlamaContextualAndButton and LlamaCSS plugins are enabled.');
+  }
+
+  /**
+   * Tests the iframe instance CSS files of plugins.
+   */
+  function testCssFiles() {
+    $this->manager = $this->container->get('plugin.manager.ckeditor.plugin');
+    $editor = Editor::load('filtered_html');
+
+    // Case 1: no CKEditor iframe instance CSS file.
+    $this->assertIdentical(array(), $this->manager->getCssFiles($editor), 'No iframe instance CSS file found.');
+
+    // Enable the CKEditor Test module, which has the LlamaCss plugin and
+    // clear the editor manager's cache so it is picked up.
+    $this->enableModules(array('ckeditor_test'));
+    $this->manager = $this->container->get('plugin.manager.ckeditor.plugin');
+    $settings = $editor->getSettings();
+    // LlamaCss: automatically enabled by adding its 'LlamaCSS' button.
+    $settings['toolbar']['rows'][0][0]['items'][] = 'LlamaCSS';
+    $editor->setSettings($settings);
+    $editor->save();
+
+    // Case 2: CKEditor iframe instance CSS file.
+    $expected = array(
+      'llama_css' => array(drupal_get_path('module', 'ckeditor_test') . '/css/llama.css')
+    );
+    $this->assertIdentical($expected, $this->manager->getCssFiles($editor), 'Iframe instance CSS file found.');
+  }
+
+}

web/core/modules/ckeditor/tests/modules/src/Kernel/CKEditorTest.php

@@ -0,0 +1,495 @@
+<?php
+
+namespace Drupal\Tests\ckeditor\Kernel;
+
+use Drupal\KernelTests\KernelTestBase;
+use Drupal\language\Entity\ConfigurableLanguage;
+use Drupal\editor\Entity\Editor;
+use Drupal\filter\Entity\FilterFormat;
+
+/**
+ * Tests for the 'CKEditor' text editor plugin.
+ *
+ * @group ckeditor
+ */
+class CKEditorTest extends KernelTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = array('system', 'user', 'filter', 'editor', 'ckeditor', 'filter_test');
+
+  /**
+   * An instance of the "CKEditor" text editor plugin.
+   *
+   * @var \Drupal\ckeditor\Plugin\Editor\CKEditor;
+   */
+  protected $ckeditor;
+
+  /**
+   * The Editor Plugin Manager.
+   *
+   * @var \Drupal\editor\Plugin\EditorManager;
+   */
+  protected $manager;
+
+  protected function setUp() {
+    parent::setUp();
+
+    // Install the Filter module.
+
+    // Create text format, associate CKEditor.
+    $filtered_html_format = FilterFormat::create(array(
+      'format' => 'filtered_html',
+      'name' => 'Filtered HTML',
+      'weight' => 0,
+      'filters' => array(
+        'filter_html' => array(
+          'status' => 1,
+          'settings' => array(
+            'allowed_html' => '<h2 id> <h3> <h4> <h5> <h6> <p> <br> <strong> <a href hreflang>',
+          )
+        ),
+      ),
+    ));
+    $filtered_html_format->save();
+    $editor = Editor::create([
+      'format' => 'filtered_html',
+      'editor' => 'ckeditor',
+    ]);
+    $editor->save();
+
+    // Create "CKEditor" text editor plugin instance.
+    $this->ckeditor = $this->container->get('plugin.manager.editor')->createInstance('ckeditor');
+  }
+
+  /**
+   * Tests CKEditor::getJSSettings().
+   */
+  function testGetJSSettings() {
+    $editor = Editor::load('filtered_html');
+
+    // Default toolbar.
+    $expected_config = $this->getDefaultInternalConfig() + array(
+      'drupalImage_dialogTitleAdd' => 'Insert Image',
+      'drupalImage_dialogTitleEdit' => 'Edit Image',
+      'drupalLink_dialogTitleAdd' => 'Add Link',
+      'drupalLink_dialogTitleEdit' => 'Edit Link',
+      'allowedContent' => $this->getDefaultAllowedContentConfig(),
+      'disallowedContent' => $this->getDefaultDisallowedContentConfig(),
+      'toolbar' => $this->getDefaultToolbarConfig(),
+      'contentsCss' => $this->getDefaultContentsCssConfig(),
+      'extraPlugins' => 'drupalimage,drupallink',
+      'language' => 'en',
+      'stylesSet' => FALSE,
+      'drupalExternalPlugins' => array(
+        'drupalimage' => file_url_transform_relative(file_create_url('core/modules/ckeditor/js/plugins/drupalimage/plugin.js')),
+        'drupallink' => file_url_transform_relative(file_create_url('core/modules/ckeditor/js/plugins/drupallink/plugin.js')),
+      ),
+    );
+    $expected_config = $this->castSafeStrings($expected_config);
+    ksort($expected_config);
+    ksort($expected_config['allowedContent']);
+    $this->assertIdentical($expected_config, $this->castSafeStrings($this->ckeditor->getJSSettings($editor)), 'Generated JS settings are correct for default configuration.');
+
+    // Customize the configuration: add button, have two contextually enabled
+    // buttons, and configure a CKEditor plugin setting.
+    $this->enableModules(array('ckeditor_test'));
+    $this->container->get('plugin.manager.editor')->clearCachedDefinitions();
+    $this->ckeditor = $this->container->get('plugin.manager.editor')->createInstance('ckeditor');
+    $this->container->get('plugin.manager.ckeditor.plugin')->clearCachedDefinitions();
+    $settings = $editor->getSettings();
+    $settings['toolbar']['rows'][0][0]['items'][] = 'Strike';
+    $settings['toolbar']['rows'][0][0]['items'][] = 'Format';
+    $editor->setSettings($settings);
+    $editor->save();
+    $expected_config['toolbar'][0]['items'][] = 'Strike';
+    $expected_config['toolbar'][0]['items'][] = 'Format';
+    $expected_config['format_tags'] = 'p;h2;h3;h4;h5;h6';
+    $expected_config['extraPlugins'] .= ',llama_contextual,llama_contextual_and_button';
+    $expected_config['drupalExternalPlugins']['llama_contextual'] = file_url_transform_relative(file_create_url('core/modules/ckeditor/tests/modules/js/llama_contextual.js'));
+    $expected_config['drupalExternalPlugins']['llama_contextual_and_button'] = file_url_transform_relative(file_create_url('core/modules/ckeditor/tests/modules/js/llama_contextual_and_button.js'));
+    $expected_config['contentsCss'][] = file_url_transform_relative(file_create_url('core/modules/ckeditor/tests/modules/ckeditor_test.css'));
+    ksort($expected_config);
+    $this->assertIdentical($expected_config, $this->castSafeStrings($this->ckeditor->getJSSettings($editor)), 'Generated JS settings are correct for customized configuration.');
+
+    // Change the allowed HTML tags; the "allowedContent" and "format_tags"
+    // settings for CKEditor should automatically be updated as well.
+    $format = $editor->getFilterFormat();
+    $format->filters('filter_html')->settings['allowed_html'] .= '<pre class> <h1> <blockquote class="*"> <address class="foo bar-* *">';
+    $format->save();
+
+    $expected_config['allowedContent']['pre'] = array('attributes' => 'class', 'styles' => FALSE, 'classes' => TRUE);
+    $expected_config['allowedContent']['h1'] = array('attributes' => FALSE, 'styles' => FALSE, 'classes' => FALSE);
+    $expected_config['allowedContent']['blockquote'] = array('attributes' => 'class', 'styles' => FALSE, 'classes' => TRUE);
+    $expected_config['allowedContent']['address'] = array('attributes' => 'class', 'styles' => FALSE, 'classes' => 'foo,bar-*');
+    $expected_config['format_tags'] = 'p;h1;h2;h3;h4;h5;h6;pre';
+    ksort($expected_config['allowedContent']);
+    $this->assertIdentical($expected_config, $this->castSafeStrings($this->ckeditor->getJSSettings($editor)), 'Generated JS settings are correct for customized configuration.');
+
+    // Disable the filter_html filter: allow *all *tags.
+    $format->setFilterConfig('filter_html', array('status' => 0));
+    $format->save();
+
+    $expected_config['allowedContent'] = TRUE;
+    $expected_config['disallowedContent'] = FALSE;
+    $expected_config['format_tags'] = 'p;h1;h2;h3;h4;h5;h6;pre';
+    $this->assertIdentical($expected_config, $this->castSafeStrings($this->ckeditor->getJSSettings($editor)), 'Generated JS settings are correct for customized configuration.');
+
+    // Enable the filter_test_restrict_tags_and_attributes filter.
+    $format->setFilterConfig('filter_test_restrict_tags_and_attributes', array(
+      'status' => 1,
+      'settings' => array(
+        'restrictions' => array(
+          'allowed' => array(
+            'p' => TRUE,
+            'a' => array(
+              'href' => TRUE,
+              'rel' => array('nofollow' => TRUE),
+              'class' => array('external' => TRUE),
+              'target' => array('_blank' => FALSE),
+            ),
+            'span' => array(
+              'class' => array('dodo' => FALSE),
+              'property' => array('dc:*' => TRUE),
+              'rel' => array('foaf:*' => FALSE),
+              'style' => array('underline' => FALSE, 'color' => FALSE, 'font-size' => TRUE),
+            ),
+            '*' => array(
+              'style' => FALSE,
+              'on*' => FALSE,
+              'class' => array('is-a-hipster-llama' => TRUE, 'and-more' => TRUE),
+              'data-*' => TRUE,
+            ),
+            'del' => FALSE,
+          ),
+        ),
+      ),
+    ));
+    $format->save();
+
+    $expected_config['allowedContent'] = array(
+      'p' => array(
+        'attributes' => TRUE,
+        'styles' => FALSE,
+        'classes' => 'is-a-hipster-llama,and-more',
+      ),
+      'a' => array(
+        'attributes' => 'href,rel,class,target',
+        'styles' => FALSE,
+        'classes' => 'external',
+      ),
+      'span' => array(
+        'attributes' => 'class,property,rel,style',
+        'styles' => 'font-size',
+        'classes' => FALSE,
+      ),
+      '*' => array(
+        'attributes' => 'class,data-*',
+        'styles' => FALSE,
+        'classes' => 'is-a-hipster-llama,and-more',
+      ),
+      'del' => array(
+        'attributes' => FALSE,
+        'styles' => FALSE,
+        'classes' => FALSE,
+      ),
+    );
+    $expected_config['disallowedContent'] = array(
+      'span' => array(
+        'styles' => 'underline,color',
+        'classes' => 'dodo',
+      ),
+      '*' => array(
+        'attributes' => 'on*',
+      ),
+    );
+    $expected_config['format_tags'] = 'p';
+    ksort($expected_config);
+    ksort($expected_config['allowedContent']);
+    ksort($expected_config['disallowedContent']);
+    $this->assertIdentical($expected_config, $this->castSafeStrings($this->ckeditor->getJSSettings($editor)), 'Generated JS settings are correct for customized configuration.');
+  }
+
+  /**
+   * Tests CKEditor::buildToolbarJSSetting().
+   */
+  function testBuildToolbarJSSetting() {
+    $editor = Editor::load('filtered_html');
+
+    // Default toolbar.
+    $expected = $this->getDefaultToolbarConfig();
+    $this->assertIdentical($expected, $this->castSafeStrings($this->ckeditor->buildToolbarJSSetting($editor)), '"toolbar" configuration part of JS settings built correctly for default toolbar.');
+
+    // Customize the configuration.
+    $settings = $editor->getSettings();
+    $settings['toolbar']['rows'][0][0]['items'][] = 'Strike';
+    $editor->setSettings($settings);
+    $editor->save();
+    $expected[0]['items'][] = 'Strike';
+    $this->assertIdentical($expected, $this->castSafeStrings($this->ckeditor->buildToolbarJSSetting($editor)), '"toolbar" configuration part of JS settings built correctly for customized toolbar.');
+
+    // Enable the editor_test module, customize further.
+    $this->enableModules(array('ckeditor_test'));
+    $this->container->get('plugin.manager.ckeditor.plugin')->clearCachedDefinitions();
+    // Override the label of a toolbar component.
+    $settings['toolbar']['rows'][0][0]['name'] = 'JunkScience';
+    $settings['toolbar']['rows'][0][0]['items'][] = 'Llama';
+    $editor->setSettings($settings);
+    $editor->save();
+    $expected[0]['name'] = 'JunkScience';
+    $expected[0]['items'][] = 'Llama';
+    $this->assertIdentical($expected, $this->castSafeStrings($this->ckeditor->buildToolbarJSSetting($editor)), '"toolbar" configuration part of JS settings built correctly for customized toolbar with contrib module-provided CKEditor plugin.');
+  }
+
+  /**
+   * Tests CKEditor::buildContentsCssJSSetting().
+   */
+  function testBuildContentsCssJSSetting() {
+    $editor = Editor::load('filtered_html');
+
+    // Default toolbar.
+    $expected = $this->getDefaultContentsCssConfig();
+    $this->assertIdentical($expected, $this->ckeditor->buildContentsCssJSSetting($editor), '"contentsCss" configuration part of JS settings built correctly for default toolbar.');
+
+    // Enable the editor_test module, which implements hook_ckeditor_css_alter().
+    $this->enableModules(array('ckeditor_test'));
+    $expected[] = file_url_transform_relative(file_create_url(drupal_get_path('module', 'ckeditor_test') . '/ckeditor_test.css'));
+    $this->assertIdentical($expected, $this->ckeditor->buildContentsCssJSSetting($editor), '"contentsCss" configuration part of JS settings built correctly while a hook_ckeditor_css_alter() implementation exists.');
+
+    // Enable LlamaCss plugin, which adds an additional CKEditor stylesheet.
+    $this->container->get('plugin.manager.editor')->clearCachedDefinitions();
+    $this->ckeditor = $this->container->get('plugin.manager.editor')->createInstance('ckeditor');
+    $this->container->get('plugin.manager.ckeditor.plugin')->clearCachedDefinitions();
+    $settings = $editor->getSettings();
+    // LlamaCss: automatically enabled by adding its 'LlamaCSS' button.
+    $settings['toolbar']['rows'][0][0]['items'][] = 'LlamaCSS';
+    $editor->setSettings($settings);
+    $editor->save();
+    $expected[] = file_url_transform_relative(file_create_url(drupal_get_path('module', 'ckeditor_test') . '/css/llama.css'));
+    $this->assertIdentical($expected, $this->ckeditor->buildContentsCssJSSetting($editor), '"contentsCss" configuration part of JS settings built correctly while a CKEditorPluginInterface implementation exists.');
+
+    // Enable the Bartik theme, which specifies a CKEditor stylesheet.
+    \Drupal::service('theme_handler')->install(['bartik']);
+    \Drupal::service('theme_handler')->setDefault('bartik');
+    $expected[] = file_url_transform_relative(file_create_url('core/themes/bartik/css/base/elements.css'));
+    $expected[] = file_url_transform_relative(file_create_url('core/themes/bartik/css/components/captions.css'));
+    $expected[] = file_url_transform_relative(file_create_url('core/themes/bartik/css/components/table.css'));
+    $expected[] = file_url_transform_relative(file_create_url('core/themes/bartik/css/components/text-formatted.css'));
+    $this->assertIdentical($expected, $this->ckeditor->buildContentsCssJSSetting($editor), '"contentsCss" configuration part of JS settings built correctly while a theme providing a CKEditor stylesheet exists.');
+  }
+
+  /**
+   * Tests Internal::getConfig().
+   */
+  function testInternalGetConfig() {
+    $editor = Editor::load('filtered_html');
+    $internal_plugin = $this->container->get('plugin.manager.ckeditor.plugin')->createInstance('internal');
+
+    // Default toolbar.
+    $expected = $this->getDefaultInternalConfig();
+    $expected['disallowedContent'] = $this->getDefaultDisallowedContentConfig();
+    $expected['allowedContent'] = $this->getDefaultAllowedContentConfig();
+    $this->assertEqual($expected, $internal_plugin->getConfig($editor), '"Internal" plugin configuration built correctly for default toolbar.');
+
+    // Format dropdown/button enabled: new setting should be present.
+    $settings = $editor->getSettings();
+    $settings['toolbar']['rows'][0][0]['items'][] = 'Format';
+    $editor->setSettings($settings);
+    $expected['format_tags'] = 'p;h2;h3;h4;h5;h6';
+    $this->assertEqual($expected, $internal_plugin->getConfig($editor), '"Internal" plugin configuration built correctly for customized toolbar.');
+  }
+
+  /**
+   * Tests StylesCombo::getConfig().
+   */
+  function testStylesComboGetConfig() {
+    $editor = Editor::load('filtered_html');
+    $stylescombo_plugin = $this->container->get('plugin.manager.ckeditor.plugin')->createInstance('stylescombo');
+
+    // Styles dropdown/button enabled: new setting should be present.
+    $settings = $editor->getSettings();
+    $settings['toolbar']['rows'][0][0]['items'][] = 'Styles';
+    $settings['plugins']['stylescombo']['styles'] = '';
+    $editor->setSettings($settings);
+    $editor->save();
+    $expected['stylesSet'] = array();
+    $this->assertIdentical($expected, $stylescombo_plugin->getConfig($editor), '"StylesCombo" plugin configuration built correctly for customized toolbar.');
+
+    // Configure the optional "styles" setting in odd ways that shouldn't affect
+    // the end result.
+    $settings['plugins']['stylescombo']['styles'] = "   \n";
+    $editor->setSettings($settings);
+    $editor->save();
+    $this->assertIdentical($expected, $stylescombo_plugin->getConfig($editor));
+    $settings['plugins']['stylescombo']['styles'] = "\r\n  \n  \r  \n ";
+    $editor->setSettings($settings);
+    $editor->save();
+    $this->assertIdentical($expected, $stylescombo_plugin->getConfig($editor), '"StylesCombo" plugin configuration built correctly for customized toolbar.');
+
+    // Now configure it properly, the end result should change.
+    $settings['plugins']['stylescombo']['styles'] = "h1.title|Title\np.mAgical.Callout|Callout";
+    $editor->setSettings($settings);
+    $editor->save();
+    $expected['stylesSet'] = array(
+      array('name' => 'Title', 'element' => 'h1', 'attributes' => array('class' => 'title')),
+      array('name' => 'Callout', 'element' => 'p', 'attributes' => array('class' => 'mAgical Callout')),
+    );
+    $this->assertIdentical($expected, $stylescombo_plugin->getConfig($editor), '"StylesCombo" plugin configuration built correctly for customized toolbar.');
+
+    // Same configuration, but now interspersed with nonsense. Should yield the
+    // same result.
+    $settings['plugins']['stylescombo']['styles'] = "  h1 .title   |  Title \r \n\r  \np.mAgical  .Callout|Callout\r";
+    $editor->setSettings($settings);
+    $editor->save();
+    $this->assertIdentical($expected, $stylescombo_plugin->getConfig($editor), '"StylesCombo" plugin configuration built correctly for customized toolbar.');
+
+    // Slightly different configuration: class names are optional.
+    $settings['plugins']['stylescombo']['styles'] = "      h1 |  Title ";
+    $editor->setSettings($settings);
+    $editor->save();
+    $expected['stylesSet'] = array(array('name' => 'Title', 'element' => 'h1'));
+    $this->assertIdentical($expected, $stylescombo_plugin->getConfig($editor), '"StylesCombo" plugin configuration built correctly for customized toolbar.');
+
+    // Invalid syntax should cause stylesSet to be set to FALSE.
+    $settings['plugins']['stylescombo']['styles'] = "h1";
+    $editor->setSettings($settings);
+    $editor->save();
+    $expected['stylesSet'] = FALSE;
+    $this->assertIdentical($expected, $stylescombo_plugin->getConfig($editor), '"StylesCombo" plugin configuration built correctly for customized toolbar.');
+  }
+
+  /**
+   * Tests language list availability in CKEditor.
+   */
+  function testLanguages() {
+    // Get CKEditor supported language codes and spot-check.
+    $this->enableModules(array('language'));
+    $this->installConfig(array('language'));
+    $langcodes = $this->ckeditor->getLangcodes();
+
+    // Language codes transformed with browser mappings.
+    $this->assertTrue($langcodes['pt-pt'] == 'pt', '"pt" properly resolved');
+    $this->assertTrue($langcodes['zh-hans'] == 'zh-cn', '"zh-hans" properly resolved');
+
+    // Language code both in Drupal and CKEditor.
+    $this->assertTrue($langcodes['gl'] == 'gl', '"gl" properly resolved');
+
+    // Language codes only in CKEditor.
+    $this->assertTrue($langcodes['en-au'] == 'en-au', '"en-au" properly resolved');
+    $this->assertTrue($langcodes['sr-latn'] == 'sr-latn', '"sr-latn" properly resolved');
+
+    // No locale module, so even though languages are enabled, CKEditor should
+    // still be in English.
+    $this->assertCKEditorLanguage('en');
+  }
+
+  /**
+   * Tests that CKEditor plugins participate in JS translation.
+   */
+  function testJSTranslation() {
+    $this->enableModules(array('language', 'locale'));
+    $this->installSchema('locale', 'locales_source');
+    $this->installSchema('locale', 'locales_location');
+    $this->installSchema('locale', 'locales_target');
+    $editor = Editor::load('filtered_html');
+    $this->ckeditor->getJSSettings($editor);
+    $localeStorage = $this->container->get('locale.storage');
+    $string = $localeStorage->findString(array('source' => 'Edit Link', 'context' => ''));
+    $this->assertTrue(!empty($string), 'String from JavaScript file saved.');
+
+    // With locale module, CKEditor should not adhere to the language selected.
+    $this->assertCKEditorLanguage();
+  }
+
+  /**
+   * Assert that CKEditor picks the expected language when French is default.
+   *
+   * @param string $langcode
+   *   Language code to assert for. Defaults to French. That is the default
+   *   language set in this assertion.
+   */
+  protected function assertCKEditorLanguage($langcode = 'fr') {
+    // Set French as the site default language.
+    ConfigurableLanguage::createFromLangcode('fr')->save();
+    $this->config('system.site')->set('default_langcode', 'fr')->save();
+
+    // Reset the language manager so new negotiations attempts will fall back on
+    // French. Reinject the language manager CKEditor to use the current one.
+    $this->container->get('language_manager')->reset();
+    $this->ckeditor = $this->container->get('plugin.manager.editor')->createInstance('ckeditor');
+
+    // Test that we now get the expected language.
+    $editor = Editor::load('filtered_html');
+    $settings = $this->ckeditor->getJSSettings($editor);
+    $this->assertEqual($settings['language'], $langcode);
+  }
+
+  protected function getDefaultInternalConfig() {
+    return array(
+      'customConfig' => '',
+      'pasteFromWordPromptCleanup' => TRUE,
+      'resize_dir' => 'vertical',
+      'justifyClasses' => array('text-align-left', 'text-align-center', 'text-align-right', 'text-align-justify'),
+      'entities' => FALSE,
+      'disableNativeSpellChecker' => FALSE,
+    );
+  }
+
+  protected function getDefaultAllowedContentConfig() {
+    return [
+      'h2' => ['attributes' => 'id', 'styles' => FALSE, 'classes' => FALSE],
+      'h3' => ['attributes' => FALSE, 'styles' => FALSE, 'classes' => FALSE],
+      'h4' => ['attributes' => FALSE, 'styles' => FALSE, 'classes' => FALSE],
+      'h5' => ['attributes' => FALSE, 'styles' => FALSE, 'classes' => FALSE],
+      'h6' => ['attributes' => FALSE, 'styles' => FALSE, 'classes' => FALSE],
+      'p' => ['attributes' => FALSE, 'styles' => FALSE, 'classes' => FALSE],
+      'br' => ['attributes' => FALSE, 'styles' => FALSE, 'classes' => FALSE],
+      'strong' => ['attributes' => FALSE, 'styles' => FALSE, 'classes' => FALSE],
+      'a' => ['attributes' => 'href,hreflang', 'styles' => FALSE, 'classes' => FALSE],
+      '*' => ['attributes' => 'lang,dir', 'styles' => FALSE, 'classes' => FALSE],
+    ];
+  }
+
+  protected function getDefaultDisallowedContentConfig() {
+    return array(
+      '*' => array('attributes' => 'on*'),
+    );
+  }
+
+  protected function getDefaultToolbarConfig() {
+    return array(
+      array(
+        'name' => 'Formatting',
+        'items' => array('Bold', 'Italic',),
+      ),
+      array(
+        'name' => 'Links',
+        'items' => array('DrupalLink', 'DrupalUnlink',),
+      ),
+      array(
+        'name' => 'Lists',
+        'items' => array('BulletedList', 'NumberedList',),
+      ),
+      array(
+        'name' => 'Media',
+        'items' => array('Blockquote', 'DrupalImage',),
+      ),
+      array(
+        'name' => 'Tools',
+        'items' => array('Source',),
+      ),
+      '/',
+    );
+  }
+
+  protected function getDefaultContentsCssConfig() {
+    return array(
+      file_url_transform_relative(file_create_url('core/modules/ckeditor/css/ckeditor-iframe.css')),
+      file_url_transform_relative(file_create_url('core/modules/system/css/components/align.module.css')),
+    );
+  }
+
+}

web/core/modules/ckeditor/tests/modules/src/Plugin/CKEditorPlugin/Llama.php

@@ -0,0 +1,64 @@
+<?php
+
+namespace Drupal\ckeditor_test\Plugin\CKEditorPlugin;
+
+use Drupal\ckeditor\CKEditorPluginInterface;
+use Drupal\Component\Plugin\PluginBase;
+use Drupal\editor\Entity\Editor;
+
+/**
+ * Defines the "Llama" plugin, with a CKEditor "llama" feature.
+ *
+ * This feature does not correspond to a toolbar button. Because this plugin
+ * does not implement the CKEditorPluginContextualInterface nor the
+ * CKEditorPluginButtonsInterface interface, there is no way of actually loading
+ * this plugin.
+ *
+ * @see \Drupal\ckeditor_test\Plugin\CKEditorPlugin\LlamaContextual
+ * @see \Drupal\ckeditor_test\Plugin\CKEditorPlugin\LlamaButton
+ * @see \Drupal\ckeditor_test\Plugin\CKEditorPlugin\LlamaContextualAndButton
+ * @see \Drupal\ckeditor_test\Plugin\CKEditorPlugin\LlamaCss
+ *
+ * @CKEditorPlugin(
+ *   id = "llama",
+ *   label = @Translation("Llama")
+ * )
+ */
+class Llama extends PluginBase implements CKEditorPluginInterface {
+
+  /**
+   * {@inheritdoc}
+   */
+  function getDependencies(Editor $editor) {
+    return array();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  function getLibraries(Editor $editor) {
+    return array();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  function isInternal() {
+    return FALSE;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  function getFile() {
+    return drupal_get_path('module', 'ckeditor_test') . '/js/llama.js';
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getConfig(Editor $editor) {
+    return array();
+  }
+
+}

web/core/modules/ckeditor/tests/modules/src/Plugin/CKEditorPlugin/LlamaButton.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace Drupal\ckeditor_test\Plugin\CKEditorPlugin;
+
+use Drupal\ckeditor\CKEditorPluginButtonsInterface;
+
+/**
+ * Defines a "LlamaButton" plugin, with a toolbar builder-enabled "llama" feature.
+ *
+ * @CKEditorPlugin(
+ *   id = "llama_button",
+ *   label = @Translation("Llama Button")
+ * )
+ */
+class LlamaButton extends Llama implements CKEditorPluginButtonsInterface {
+
+  /**
+   * {@inheritdoc}
+   */
+  function getButtons() {
+    return array(
+      'Llama' => array(
+        'label' => t('Insert Llama'),
+      ),
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  function getFile() {
+    return drupal_get_path('module', 'ckeditor_test') . '/js/llama_button.js';
+  }
+
+}

web/core/modules/ckeditor/tests/modules/src/Plugin/CKEditorPlugin/LlamaContextual.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace Drupal\ckeditor_test\Plugin\CKEditorPlugin;
+
+use Drupal\ckeditor\CKEditorPluginContextualInterface;
+use Drupal\editor\Entity\Editor;
+
+/**
+ * Defines a "Llama" plugin, with a contextually enabled "llama" feature.
+ *
+ * @CKEditorPlugin(
+ *   id = "llama_contextual",
+ *   label = @Translation("Contextual Llama")
+ * )
+ */
+class LlamaContextual extends Llama implements CKEditorPluginContextualInterface {
+
+  /**
+   * {@inheritdoc}
+   */
+  function isEnabled(Editor $editor) {
+    // Automatically enable this plugin if the Underline button is enabled.
+    $settings = $editor->getSettings();
+    foreach ($settings['toolbar']['rows'] as $row) {
+      foreach ($row as $group) {
+        if (in_array('Strike', $group['items'])) {
+          return TRUE;
+        }
+      }
+    }
+    return FALSE;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  function getFile() {
+    return drupal_get_path('module', 'ckeditor_test') . '/js/llama_contextual.js';
+  }
+
+}

web/core/modules/ckeditor/tests/modules/src/Plugin/CKEditorPlugin/LlamaContextualAndButton.php

@@ -0,0 +1,76 @@
+<?php
+
+namespace Drupal\ckeditor_test\Plugin\CKEditorPlugin;
+
+use Drupal\ckeditor\CKEditorPluginButtonsInterface;
+use Drupal\ckeditor\CKEditorPluginContextualInterface;
+use Drupal\ckeditor\CKEditorPluginConfigurableInterface;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\editor\Entity\Editor;
+
+/**
+ * Defines a "LlamaContextualAndbutton" plugin, with a contextually OR toolbar
+ * builder-enabled "llama" feature.
+ *
+ * @CKEditorPlugin(
+ *   id = "llama_contextual_and_button",
+ *   label = @Translation("Contextual Llama With Button")
+ * )
+ */
+class LlamaContextualAndButton extends Llama implements CKEditorPluginContextualInterface, CKEditorPluginButtonsInterface, CKEditorPluginConfigurableInterface {
+
+  /**
+   * {@inheritdoc}
+   */
+  function isEnabled(Editor $editor) {
+    // Automatically enable this plugin if the Strike button is enabled.
+    $settings = $editor->getSettings();
+    foreach ($settings['toolbar']['rows'] as $row) {
+      foreach ($row as $group) {
+        if (in_array('Strike', $group['items'])) {
+          return TRUE;
+        }
+      }
+    }
+    return FALSE;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  function getButtons() {
+    return array(
+      'Llama' => array(
+        'label' => t('Insert Llama'),
+      ),
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  function getFile() {
+    return drupal_get_path('module', 'ckeditor_test') . '/js/llama_contextual_and_button.js';
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  function settingsForm(array $form, FormStateInterface $form_state, Editor $editor) {
+    // Defaults.
+    $config = array('ultra_llama_mode' => FALSE);
+    $settings = $editor->getSettings();
+    if (isset($settings['plugins']['llama_contextual_and_button'])) {
+      $config = $settings['plugins']['llama_contextual_and_button'];
+    }
+
+    $form['ultra_llama_mode'] = array(
+      '#title' => t('Ultra llama mode'),
+      '#type' => 'checkbox',
+      '#default_value' => $config['ultra_llama_mode'],
+    );
+
+    return $form;
+  }
+
+}

web/core/modules/ckeditor/tests/modules/src/Plugin/CKEditorPlugin/LlamaCss.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace Drupal\ckeditor_test\Plugin\CKEditorPlugin;
+
+use Drupal\ckeditor\CKEditorPluginButtonsInterface;
+use Drupal\ckeditor\CKEditorPluginCssInterface;
+use Drupal\editor\Entity\Editor;
+
+/**
+ * Defines a "LlamaCss" plugin, with an associated "llama" CSS.
+ *
+ * @CKEditorPlugin(
+ *   id = "llama_css",
+ *   label = @Translation("Llama CSS")
+ * )
+ */
+class LlamaCss extends Llama implements CKEditorPluginButtonsInterface, CKEditorPluginCssInterface {
+
+  /**
+   * {@inheritdoc}
+   */
+  function getButtons() {
+    return array(
+      'LlamaCSS' => array(
+        'label' => t('Insert Llama CSS'),
+      ),
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  function getCssFiles(Editor $editor) {
+    return array(
+      drupal_get_path('module', 'ckeditor_test') . '/css/llama.css'
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  function getFile() {
+    return drupal_get_path('module', 'ckeditor_test') . '/js/llama_css.js';
+  }
+
+}

web/core/modules/ckeditor/tests/modules/src/Plugin/Filter/TestAttributeFilter.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace Drupal\ckeditor_test\Plugin\Filter;
+
+use Drupal\Component\Utility\Html;
+use Drupal\filter\FilterProcessResult;
+use Drupal\filter\Plugin\FilterBase;
+
+/**
+ * A filter that adds a test attribute to any configured HTML tags.
+ *
+ * @Filter(
+ *   id = "test_attribute_filter",
+ *   title = @Translation("Test Attribute Filter"),
+ *   type = Drupal\filter\Plugin\FilterInterface::TYPE_TRANSFORM_REVERSIBLE,
+ *   settings = {
+ *     "tags" = {},
+ *   },
+ *   weight = -10
+ * )
+ */
+class TestAttributeFilter extends FilterBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function process($text, $langcode) {
+    $document = Html::load($text);
+    foreach ($this->settings['tags'] as $tag) {
+      $tag_elements = $document->getElementsByTagName($tag);
+      foreach ($tag_elements as $tag_element) {
+        $tag_element->setAttribute('test_attribute', 'test attribute value');
+      }
+    }
+    return new FilterProcessResult(Html::serialize($document));
+  }
+
+}

web/core/modules/ckeditor/tests/src/FunctionalJavascript/CKEditorIntegrationTest.php

@@ -0,0 +1,121 @@
+<?php
+
+namespace Drupal\Tests\ckeditor\FunctionalJavascript;
+
+use Drupal\Core\Entity\Entity\EntityFormDisplay;
+use Drupal\editor\Entity\Editor;
+use Drupal\field\Entity\FieldConfig;
+use Drupal\field\Entity\FieldStorageConfig;
+use Drupal\filter\Entity\FilterFormat;
+use Drupal\FunctionalJavascriptTests\JavascriptTestBase;
+use Drupal\node\Entity\NodeType;
+
+/**
+ * Tests the integration of CKEditor.
+ *
+ * @group ckeditor
+ */
+class CKEditorIntegrationTest extends JavascriptTestBase {
+
+  /**
+   * The account.
+   *
+   * @var \Drupal\user\UserInterface
+   */
+  protected $account;
+
+  /**
+   * {@inheritdoc}
+   */
+  public static $modules = ['node', 'ckeditor', 'filter'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+
+    // Create a text format and associate CKEditor.
+    $filtered_html_format = FilterFormat::create([
+      'format' => 'filtered_html',
+      'name' => 'Filtered HTML',
+      'weight' => 0,
+    ]);
+    $filtered_html_format->save();
+
+    Editor::create([
+      'format' => 'filtered_html',
+      'editor' => 'ckeditor',
+    ])->save();
+
+    // Create a node type for testing.
+    NodeType::create(['type' => 'page', 'name' => 'page'])->save();
+
+    $field_storage = FieldStorageConfig::loadByName('node', 'body');
+
+    // Create a body field instance for the 'page' node type.
+    FieldConfig::create([
+      'field_storage' => $field_storage,
+      'bundle' => 'page',
+      'label' => 'Body',
+      'settings' => ['display_summary' => TRUE],
+      'required' => TRUE,
+    ])->save();
+
+    // Assign widget settings for the 'default' form mode.
+    EntityFormDisplay::create([
+      'targetEntityType' => 'node',
+      'bundle' => 'page',
+      'mode' => 'default',
+      'status' => TRUE,
+    ])->setComponent('body', ['type' => 'text_textarea_with_summary'])
+      ->save();
+
+    $this->account = $this->drupalCreateUser([
+      'administer nodes',
+      'create page content',
+      'use text format filtered_html',
+    ]);
+    $this->drupalLogin($this->account);
+  }
+
+  /**
+   * Tests if the fragment link to a textarea works with CKEditor enabled.
+   */
+  public function testFragmentLink() {
+    $session = $this->getSession();
+    $web_assert = $this->assertSession();
+    $ckeditor_id = '#cke_edit-body-0-value';
+
+    $this->drupalGet('node/add/page');
+
+    $session->getPage();
+
+    // Add a bottom margin to the title field to be sure the body field is not
+    // visible. PhantomJS runs with a resolution of 1024x768px.
+    $session->executeScript("document.getElementById('edit-title-0-value').style.marginBottom = '800px';");
+
+    // Check that the CKEditor-enabled body field is currently not visible in
+    // the viewport.
+    $web_assert->assertNotVisibleInViewport('css', $ckeditor_id, 'topLeft', 'CKEditor-enabled body field is visible.');
+
+    $before_url = $session->getCurrentUrl();
+
+    // Trigger a hash change with as target the hidden textarea.
+    $session->executeScript("location.hash = '#edit-body-0-value';");
+
+    // Check that the CKEditor-enabled body field is visible in the viewport.
+    $web_assert->assertVisibleInViewport('css', $ckeditor_id, 'topLeft', 'CKEditor-enabled body field is not visible.');
+
+    // Use JavaScript to go back in the history instead of
+    // \Behat\Mink\Session::back() because that function doesn't work after a
+    // hash change.
+    $session->executeScript("history.back();");
+
+    $after_url = $session->getCurrentUrl();
+
+    // Check that going back in the history worked.
+    self::assertEquals($before_url, $after_url, 'History back works.');
+  }
+
+}

web/core/modules/ckeditor/tests/src/Kernel/Plugin/CKEditorPlugin/InternalTest.php

@@ -0,0 +1,140 @@
+<?php
+
+namespace Drupal\Tests\ckeditor\Kernel\Plugin\CKEditorPlugin;
+
+use Drupal\editor\Entity\Editor;
+use Drupal\filter\Entity\FilterFormat;
+use Drupal\KernelTests\KernelTestBase;
+
+/**
+ * @coversDefaultClass \Drupal\ckeditor\Plugin\CKEditorPlugin\Internal
+ *
+ * @group ckeditor
+ */
+class InternalTest extends KernelTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = [
+    'ckeditor',
+    'ckeditor_test',
+    'filter',
+    'editor',
+  ];
+
+  /**
+   * A testing text format.
+   *
+   * @var \Drupal\filter\Entity\FilterFormat
+   */
+  protected $format;
+
+  /**
+   * A testing text editor.
+   *
+   * @var \Drupal\editor\Entity\Editor
+   */
+  protected $editor;
+
+  /**
+   * The CKEditor plugin manager.
+   *
+   * @var \Drupal\Component\Plugin\PluginManagerInterface
+   */
+  protected $ckeditorPluginManager;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+    $this->installEntitySchema('editor');
+    $this->installEntitySchema('filter_format');
+
+    $this->format = FilterFormat::create([
+      'format' => 'test_format',
+      'name' => $this->randomMachineName(),
+    ]);
+    $this->format->save();
+
+    $this->editor = Editor::create([
+      'editor' => 'ckeditor',
+      'format' => 'test_format',
+      'settings' => [
+        'toolbar' => [
+          'rows' => [
+            [
+              [
+                'name' => 'Enabled Buttons',
+                'items' => [
+                  'Format',
+                ],
+              ],
+            ],
+          ],
+        ],
+      ],
+    ]);
+    $this->editor->save();
+
+    $this->ckeditorPluginManager = $this->container->get('plugin.manager.ckeditor.plugin');
+  }
+
+  /**
+   * Test the format tags settings.
+   *
+   * @dataProvider formatTagsSettingsTestCases
+   */
+  public function testFormatTagsSettings($filter_plugins, $expected_format_tags) {
+    foreach ($filter_plugins as $filter_plugin_id => $filter_plugin_settings) {
+      $this->format->setFilterConfig($filter_plugin_id, $filter_plugin_settings);
+    }
+    $this->format->save();
+
+    $internal_plugin = $this->ckeditorPluginManager->createInstance('internal', []);
+    $plugin_config = $internal_plugin->getConfig($this->editor);
+    $this->assertEquals($expected_format_tags, explode(';', $plugin_config['format_tags']));
+  }
+
+  /**
+   * A data provider for testFormatTagsSettings.
+   */
+  public function formatTagsSettingsTestCases() {
+    $all_tags = ['p', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'pre'];
+
+    return [
+      'No filter plugins enabled (all tags allowed)' => [
+        [],
+        $all_tags,
+      ],
+      'HTML filter plugin enabled (some tags filtered out)' => [
+        [
+          'filter_html' => [
+            'status' => 1,
+            'settings' => [
+              'allowed_html' => '<h1> <h2>',
+              'filter_html_help' => 1,
+              'filter_html_nofollow' => 0,
+            ],
+          ],
+        ],
+        ['p', 'h1', 'h2'],
+      ],
+      'Test attribute filter enabled (all tags allowed)' => [
+        [
+          'test_attribute_filter' => [
+            'status' => 1,
+            'settings' => [
+              'tags' => ['h1', 'h2'],
+            ],
+          ],
+        ],
+        $all_tags,
+      ],
+    ];
+  }
+
+}

web/core/modules/ckeditor/tests/src/Unit/CKEditorPluginManagerTest.php

@@ -0,0 +1,97 @@
+<?php
+
+namespace Drupal\Tests\ckeditor\Unit;
+
+use Drupal\ckeditor\CKEditorPluginManager;
+use Drupal\editor\Entity\Editor;
+use Drupal\Tests\UnitTestCase;
+
+/**
+ * @coversDefaultClass \Drupal\ckeditor\CKEditorPluginManager
+ *
+ * @group ckeditor
+ */
+class CKEditorPluginManagerTest extends UnitTestCase {
+
+  /**
+   * Provides a list of configs to test.
+   */
+  public function providerGetEnabledButtons() {
+    return [
+      'empty' => [
+        [],
+        []
+      ],
+      '1 row, 1 group' => [
+        [
+          // Row 1.
+          [
+            // Group 1.
+            ['name' => 'Formatting', 'items' => ['Bold', 'Italic']],
+          ]
+        ],
+        ['Bold', 'Italic']
+      ],
+      '1 row, >1 groups' => [
+        [
+          // Row 1.
+          [
+            // Group 1.
+            ['name' => 'Formatting', 'items' => ['Bold', 'Italic']],
+            // Group 2.
+            ['name' => 'Linking', 'items' => ['Link']],
+          ],
+        ],
+        ['Bold', 'Italic', 'Link']
+      ],
+      '2 rows, 1 group each' => [
+        [
+          // Row 1.
+          [
+            // Group 1.
+            ['name' => 'Formatting', 'items' => ['Bold', 'Italic']],
+          ],
+          // Row 2.
+          [
+            // Group 1.
+            ['name' => 'Tools', 'items' => ['Source']],
+          ],
+        ],
+        ['Bold', 'Italic', 'Source'],
+      ],
+      '2 rows, >1 groups each' => [
+        [
+          // Row 1.
+          [
+            // Group 1.
+            ['name' => 'Formatting', 'items' => ['Bold', 'Italic']],
+            // Group 2.
+            ['name' => 'Linking', 'items' => ['Link']],
+        ],
+          // Row 2.
+          [
+            // Group 1.
+            ['name' => 'Tools', 'items' => ['Source']],
+            // Group 2.
+            ['name' => 'Advanced', 'items' => ['Llama']],
+          ],
+        ],
+        ['Bold', 'Italic', 'Link', 'Source', 'Llama']
+      ],
+    ];
+  }
+
+  /**
+   * @covers ::getEnabledButtons
+   * @dataProvider providerGetEnabledButtons
+   */
+  public function testGetEnabledButtons(array $toolbar_rows, array $expected_buttons) {
+    $editor = $this->prophesize(Editor::class);
+    $editor->getSettings()
+      ->willReturn(['toolbar' => ['rows' => $toolbar_rows]]);
+
+    $enabled_buttons = CKEditorPluginManager::getEnabledButtons($editor->reveal());
+    $this->assertEquals($expected_buttons, $enabled_buttons);
+  }
+
+}

web/core/modules/ckeditor/tests/src/Unit/Plugin/CKEditorPlugin/LanguageTest.php

@@ -0,0 +1,65 @@
+<?php
+
+namespace Drupal\Tests\ckeditor\Unit\Plugin\CKEditorPlugin;
+
+use Drupal\ckeditor\Plugin\CKEditorPlugin\Language;
+use Drupal\Core\Language\LanguageManager;
+use Drupal\Tests\UnitTestCase;
+
+/**
+ * @coversDefaultClass \Drupal\ckeditor\Plugin\CKEditorPlugin\Language
+ *
+ * @group ckeditor
+ */
+class LanguageTest extends UnitTestCase {
+
+  /**
+   * The plugin under test.
+   *
+   * @var \Drupal\ckeditor\Plugin\CKEditorPlugin\Language
+   */
+  protected $plugin;
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setUp() {
+    $this->plugin = new Language([], $this->randomMachineName(), []);
+  }
+
+  /**
+   * Provides a list of configs to test.
+   */
+  public function providerGetConfig() {
+    return [
+      ['un', count(LanguageManager::getUnitedNationsLanguageList())],
+      ['all', count(LanguageManager::getStandardLanguageList())],
+    ];
+  }
+
+  /**
+   * @covers ::getConfig
+   *
+   * @dataProvider providerGetConfig
+   */
+  public function testGetConfig($language_list, $expected_number) {
+    $editor = $this->getMockBuilder('Drupal\editor\Entity\Editor')
+      ->disableOriginalConstructor()
+      ->getMock();
+    $editor->expects($this->once())
+      ->method('getSettings')
+      ->willReturn(['plugins' => ['language' => ['language_list' => $language_list]]]);
+
+    $config = $this->plugin->getConfig($editor);
+
+    $this->assertInternalType('array', $config);
+    $this->assertTrue(in_array('ar:Arabic:rtl', $config['language_list']));
+    $this->assertTrue(in_array('zh-hans:Chinese, Simplified', $config['language_list']));
+    $this->assertTrue(in_array('en:English', $config['language_list']));
+    $this->assertTrue(in_array('fr:French', $config['language_list']));
+    $this->assertTrue(in_array('ru:Russian', $config['language_list']));
+    $this->assertTrue(in_array('ar:Arabic:rtl', $config['language_list']));
+    $this->assertEquals($expected_number, count($config['language_list']));
+  }
+
+}