MDL-83881 question: Switch user ids in updated questions

Add switching of "modifiedby" and "createdby" usernames for user ids in
the "updated questions" behat creatable entity.

question/tests/generator/behat_core_question_generator.php

@@ -45,7 +45,12 @@ class behat_core_question_generator extends behat_generator_base {
                 'singular' => 'question',
                 'datagenerator' => 'updated_question',
                 'required' => ['question', 'questioncategory'],
-                'switchids' => ['question' => 'id', 'questioncategory' => 'category'],
+                'switchids' => [
+                    'question' => 'id',
+                    'questioncategory' => 'category',
+                    'modifiedbyuser' => 'modifiedby',
+                    'createdbyuser' => 'createdby',
+                ],
             ],
         ];
     }
@@ -65,6 +70,26 @@ class behat_core_question_generator extends behat_generator_base {
         return $id;
     }
 
+    /**
+     * Look up the id of the createdby user from their username
+     *
+     * @param string $username The username for the createdby user.
+     * @return int The user ID.
+     */
+    protected function get_createdbyuser_id(string $username): int {
+        return $this->get_user_id($username);
+    }
+
+    /**
+     * Look up the id of the modifiedby user from their username
+     *
+     * @param string $username The username for the modifiedby user.
+     * @return int The user ID.
+     */
+    protected function get_modifiedbyuser_id(string $username): int {
+        return $this->get_user_id($username);
+    }
+
     /**
      * Update a question
      *