>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #3538818. --> Reported by: [d34dman](https://www.drupal.org/user/751698) >>> <ul> <li>Write kernel tests for: <ul> <li>Plugin discovery and instantiation.</li> <li>Execution of sample processors with mocked input/output.</li> <li>NodeType to plugin mapping validation.</li> </ul> </li> </ul>