This might help (a bit):
http://zone.ni.com/devzone/conceptd.nsf/webmain/37E49997EA3A6590862568740052899E?opendocument
It would seem that there are no commercially available tools to
perform automated testing of LabVIEW apps. What ways do others use to
prove there software works?
Depends on you application and each company quality test procedure.
With simulation or actual hardware you can test out your code by
yourself or by other engineers.
Even i cannot think of any commerically available tool to test LabVIEW
applications.
You do simulation to verify you code.
Any way