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Heckle is unit test sadism(tm) at it's core. 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.
It's like hiring a white-hat hacker to try to break into your server and making sure you detect it. You learn the most by trying to break things and watching the outcome in an act of unit test sadism.
* Mutates booleans, numbers, strings, symbols, ranges, regexes and branches (if, while, unless, until)
* Able to mutate entire classes, or individual methods
* Can not yet mutate class methods
% heckle -v Autotest
* ruby2ruby 1.1.2 or greater
* ParseTree 1.6.1 or greater
* sudo gem install heckle
(The MIT License)
Copyright (c) 2006-2008 Ryan Davis and Kevin Clark
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