Issue #3371937 by yash.rode, Abhijith S, smustgrave, fgm: Theme declaration...

Issue #3371937 by yash.rode, Abhijith S, smustgrave, fgm: Theme declaration and templates mismatch for feed_icon

core/includes/theme.inc

@@ -1890,7 +1890,7 @@ function drupal_common_theme() {
       'variables' => ['items' => [], 'title' => '', 'list_type' => 'ul', 'wrapper_attributes' => [], 'attributes' => [], 'empty' => NULL, 'context' => []],
     ],
     'feed_icon' => [
-      'variables' => ['url' => NULL, 'title' => NULL],
+      'variables' => ['url' => NULL, 'title' => NULL, 'attributes' => []],
     ],
     'progress_bar' => [
       'variables' => ['label' => NULL, 'percent' => NULL, 'message' => NULL],

core/modules/system/tests/src/Kernel/Common/AddFeedTest.php

@@ -99,4 +99,20 @@ public function testFeedIconEscaping() {
     $this->assertEquals('Subscribe to <>&"'', trim(strip_tags($text)), 'feed_icon template escapes reserved HTML characters.');
   }
 
+  /**
+   * Tests that the rendered output contains specific attributes.
+   */
+  public function testAttributeAdded(): void {
+    $variables = [
+      '#theme' => 'feed_icon',
+      '#url' => 'node/add/',
+      '#title' => 'testing title',
+      '#attributes' => ['title' => 'some title', 'class' => ['some-class']],
+    ];
+    $rendered_output = (string) \Drupal::service('renderer')->renderRoot($variables);
+
+    // Check if the class 'some-class' is present in the rendered output.
+    $this->assertStringContainsString('some-class', $rendered_output, "The class 'some-class' should be present in the rendered output.");
+  }
+
 }