Using code coverage and mutation testing to add tests to legacy code

Refactoring is a key skill needed when working with legacy code bases, and the easiest / safest way to do it is with good test coverage. But what if your legacy code base has no tests? This detailed demonstration will show you, using practical examples, how to use code coverage and mutation testing to add tests to your legacy code base.

Clare Sudbery is an independent technical coach with over 20 years of software engineering experience. She specialises in TDD, refactoring, continuous integration and other eXtreme Programming (XP) practices.

Clare taught the Coding Black Females’ Return to Tech programme and co-ran Made Tech’s academy – coaching inexperienced engineers to learn on the job. She has a passion for helping under-represented groups to flourish in tech.

Clare hosted Season One of the acclaimed Making Tech Better podcast and publishes content on Medium (“A Woman in Technology”) and her own site (“In Simple Terms”). She is the author of the Stupidity Manifesto, has written about trunk-based development and refactoring for O’Reilly and for Martin Fowler’s site, and regularly presents workshops and keynotes at events all over the world.