Awesome @Sady_Rifat .Thanks a lot!

The error is coming due to the https://github.com/adobe/aem-core-wcm-components/blob/main/testing/aem-mock-plugin/src/main/java/com/adobe/cq/wcm/core/components/testing/mock/ContextPlugins.java

Hi @Sady_Rifat,Thanks for the details documentation. I am trying to extend the title component here and still getting Error :Caused by: org.apache.sling.testing.mock.osgi.ReferenceViolationException: Unable to inject mandatory reference 'externalizer' for class com.adobe.cq.wcm.core.components.inter...