c32hedge

@Andy Well, partly, but I think a good tester should have enough intuition about how code works to come up with some good guesses at how to pass null values (e.g. leaving fields blank, removing default values, etc.)

@Andy If the tester knows the bug fix was adding a null check, they can look for similar bugs by trying to pass null in other places. Uncaught exception? Try generating other types of exceptions.