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.
I'm not sure what the focus option does based on "Apply the eye of sauron". I don't detect a difference in the output and looking at the source code I'm still unsure what it's useful for. It would be nice to have a clearer explanation.
I'm not sure what the focus option does based on "Apply the eye of sauron". I don't detect a difference in the output and looking at the source code I'm still unsure what it's useful for. It would be nice to have a clearer explanation.