The Jargon File (version 4.4.7, 29 Dec 2003):
bang on
 vt.
    To stress-test a piece of hardware or software: ?I banged on the new
    version of the simulator all day yesterday and it didn't crash once. I
    guess it is ready for release.? The term pound on is synonymous.
The Free On-line Dictionary of Computing (30 December 2018):
bang on
pound on
   (Or "pound on").  To stress-test a piece of hardware or
   software: "I banged on the new version of the simulator all
   day yesterday and it didn't crash once.  I guess it is ready
   for release."
   [Jargon File]