Evaluation of Test Code Quality with Aspect-Oriented Mutations

Along with growing popularity of agile methodologies and open source movement, unit testing has become one of the core practices in modern software engineering. It is particularly important in eXtreme Programming [1], which explicitly diminish the importance of other artifacts than source code and tests cases. In XP unit test cases not only verify if software meets functional requirements, but also enable refactoring, alleviate comprehension and provide guidance on how the production code should be used. Therefore, they contribute to many other important practices of XP, which explicitly or implicitly rely on their ability to effectively discover bugs.