This is a big question. You will need to measure pressure in the intake and delivery lines and flow through the system. You may need to record torque on the pump shaft and power consumption by the motor.Any changes in level of the pumped liquid should also be recorded.If you need to check for cavitation you will need to vary the height of the intake. Cavitation damages the puimp rotor.
You are right Praveen is not designing a pump, but he is testing a pump and for this he needs to consider the points I raise. The rig must allow or provide these measurements.
Thank you very much dear sir, for your great help in designing the pump testing rig, the pdf links were very helpful while designing the testing rig, finally im done with the designing part now im concentrating on different measurING ins to be used for the testing as per IS code specification.