This class contains extra methods for the standard SAP class CL_ABAP_UNIT_ASSERT. CL_ABAP_UNIT_ASSERT is the class for ABAP Unit. ABAP Unit is the automated ABAP unit testing framework for SAP ABAP.
This method improved the failures on Standard tables.
For more information read SAP blog:
This method is for negative testing. It compares two BAPIRET2_T tables.
This method is not added yet. It function like method FAIL. The extra functionality is that it will also show the message ID, NUMBER, TYPE and VARIABLES.