UnsupportedOperationException: EnterpriseArchive does not support classes

EnterpriseArchiveImpl extends EnterpriseContainerBase which extends ContainerBase which implements ClassContainer.

However addClass from ClassContainer interface throws UnsupportedOperationException.

This is not nice. MockContexts extension for Arquillian does this:

if (appArchive instanceof ClassContainer) {
            ((ClassContainer) appArchive).addClass(MockViewScopedContext.class);
            ((ClassContainer) appArchive).addClass(MockConversationScopedContext.class);
        }

To avoid such problems, and for EAR it hits UnsupportedOperationException. Very not nice.