Heckle is a mutation tester. It modifies your code and runs your tests to make sure they fail. The idea is that if code can be changed and your tests don't notice, either that code isn't being covered or it doesn't do anything.
Changes:
1.4.1 / 2007-06-05
3 bug fixes:
- Add zentest as a heckle dependency. Closes #10996
- Fixed heckling of call with blocks.
- Fix testunitheckler's test_pass? so it returns the result of the run rather than ARGV.clear
