Issue #3489690: Add an event that triggers on chat iterator consumption

src/OperationType/Chat/StreamedChatMessageIterator.php

@@ -20,7 +20,7 @@ abstract class StreamedChatMessageIterator implements StreamedChatMessageIterato
    * The messages.
    *
    * @var array
-   *   The streamchat messages.
+   *   The stream chat messages.
    */
   protected $messages = [];
 

tests/src/Mock/MockStreamedChatIterator.php

@@ -3,12 +3,13 @@
 namespace Drupal\Tests\ai\Mock;
 
 use Drupal\ai\OperationType\Chat\StreamedChatMessage;
+use Drupal\ai\OperationType\Chat\StreamedChatMessageIterator;
 use Drupal\ai\OperationType\Chat\StreamedChatMessageIteratorInterface;
 
 /**
  * Mock chat iterator for testing.
  */
-class MockStreamedChatIterator implements StreamedChatMessageIteratorInterface {
+class MockStreamedChatIterator extends StreamedChatMessageIterator implements StreamedChatMessageIteratorInterface {
 
   /**
    * The iterator.