But I know a lot of people in the early days of XP went to extremes, 100% code coverage, mutation tools for every condition to ensure unit tests broke in expected ways, etc. But they were more experiments in pushing the limits rather than things that gave productivity gains.
Which he also gave as an answer here:
http://stackoverflow.com/questions/153234/how-deep-are-your-...
But I know a lot of people in the early days of XP went to extremes, 100% code coverage, mutation tools for every condition to ensure unit tests broke in expected ways, etc. But they were more experiments in pushing the limits rather than things that gave productivity gains.