If a method is being tested that invokes SessionContext.setRollbackOnly(), then the commit mode doesn't work correctly, because doing a commit() after setRollbackOnly() will fail. Therefore, the method TransactionalWrapper.afterTest() should be implemented as follows:
final TransactionMode mode = metadataProvider.get().getTransactionalMode();
final UserTransaction trans = obtainTransaction();
if (TransactionMode.COMMIT.equals(mode)) {
if (Status.STATUS_MARKED_ROLLBACK.equals(trans.getStatus()))

{ trans.rollback(); }

else

{ trans.commit(); }

}
else

{ trans.rollback(); }