Issue #2888723 by fenstrat, Petr Illek, kim.pepper, johnennew, Wim Leers,...

Issue #2888723 by fenstrat, Petr Illek, kim.pepper, johnennew, Wim Leers, alexpott: ckeditor_stylesheets cache busting: use system.css_js_query_string

Closes #3365251

tests/modules/src/Form/AjaxCssForm.php

@@ -8,6 +8,7 @@ use Drupal\Core\File\FileUrlGeneratorInterface;
 use Drupal\Core\Form\FormBase;
 use Drupal\Core\Form\FormStateInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
+use Drupal\Core\Extension\ModuleExtensionList;
 
 /**
  * A form for testing delivery of CSS to CKEditor via AJAX.
@@ -23,21 +24,35 @@ class AjaxCssForm extends FormBase {
    */
   protected $fileUrlGenerator;
 
+  /**
+   * The module extension list service.
+   *
+   * @var \Drupal\Core\Extension\ModuleExtensionList
+   */
+  protected $moduleExtensionList;
+
   /**
    * Constructs an AjaxCssForm.
    *
    * @param \Drupal\Core\File\FileUrlGeneratorInterface $file_url_generator
    *   The file URL generator.
+   * 
+   * @param \Drupal\Core\Extension\ModuleExtensionList $moduleExtensionList
+   *   The module extension list service.
    */
-  public function __construct(FileUrlGeneratorInterface $file_url_generator) {
+  public function __construct(FileUrlGeneratorInterface $file_url_generator, ModuleExtensionList $moduleExtensionList) {
     $this->fileUrlGenerator = $file_url_generator;
+    $this->moduleExtensionList = $moduleExtensionList;
   }
 
   /**
    * @inheritDoc
    */
   public static function create(ContainerInterface $container) {
-    return new static($container->get('file_url_generator'));
+    return new static(
+      $container->get('file_url_generator'),
+      $container->get('extension.list.module')
+    );
   }
 
   /**
@@ -107,7 +122,7 @@ class AjaxCssForm extends FormBase {
    */
   protected function generateResponse($editor_id) {
     // Build a URL to the style sheet that will be added.
-    $url = \Drupal::service('extension.list.module')->getPath('ckeditor_test') . '/css/test.css';
+    $url = $this->moduleExtensionList->getPath('ckeditor_test') . '/css/test.css';
     $url = $this->fileUrlGenerator->generateString($url);
 
     $response = new AjaxResponse();