5a: Create the ArticleWrapper class

Add the contents for the article wrapper class.

This fails as there’s no article to wrap yet within the test.

web/modules/custom/my_module/src/Wrapper/ArticleWrapper.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace Drupal\my_module\Wrapper;
+
+use Drupal\node\NodeInterface;
+
+class ArticleWrapper {
+
+  private $article;
+
+  public function __construct(NodeInterface $node) {
+    $this->article = $node;
+  }
+
+  public function getOriginal(): NodeInterface {
+    return $this->article;
+  }
+
+}

web/modules/custom/my_module/tests/src/Unit/Wrapper/ArticleWrapperTest.php

@@ -2,6 +2,7 @@
 
 namespace Drupal\Tests\my_module\Unit\Wrapper;
 
+use Drupal\my_module\Wrapper\ArticleWrapper;
 use Drupal\node\NodeInterface;
 use Drupal\Tests\UnitTestCase;