I'm finding that in my unit-tests with pFUnit if I update the error message that aborts I also have to update the unit-tester. This is for example annoying when you add something that gives the filename and line number in the error message as well.
In python unittest there is an assertRaisesRegEx function that helps with this. Could something similar be added to pFUnit? It seems like this should be fairly easy to add, albeit the complexity of Regular expressions might be difficult. But, maybe it just does a simpler pattern match at first? Does the error message contain the given substring for example?