Hi Ganesh,
You can do two type of testings:
First you should check if the BAPI WRAPPER is retrieving some data from the SAP Backend.
Go to SE37 t-code in SAP, and put the name of the BAPI WRAPPER. Then complete the following parametes: your User ID, your USER GUID, and some filters you may have. Press F8 and check if some data is retrieved.
For further debugging, you can put a breakpoint in the GET method of the Class handler related with the MDO.
Second, in case the BAPI WRAPPER is retirieving some information, you can go to the ATE to check it.
In the ATE, go to: Inspect>Objects.
Then look for the Objects Collection you have created and check if there are some objects in the Collection you have created.
Hope this helps.
Best Regards,
Emanuel