I am trying to understand unit testing in Pega. I created a simple activity "Id" that I would like to test. Id has one required in parameter X, one out parameter Y, and does Property-Set(Param.Y, Param.X).
I tried testing from "menu Actions > Run" and from "tab Test Cases > Record new test case". I chose various parameters and tried entering various values (including no value) for X and Y, but I can't get anything other than an "ActivityStatusSuccess" window that shows a green checkmark and says: Status: good; Message: The Operation completed successfully, but returned no content; [...].
How can I get something meaningful, e.g. a test failing if I enter different values for X and Y?
Also maybe the help  should be updated; what it describes doesn't seem to match the existing interface.