Empirical evaluation of the textual differencing regression testing technique

摘要: Regression testing is a commonly used activity whose purpose to determine whether the modifications made software system have introduced new faults. Textual differencing new, safe and fairly precise, selective regression technique that works by comparing source files from old version of program. We implemented textual in tool called Pythia. Pythia has been developed primarily through integration standard, well known UNIX programs, capable analyzing large systems written C. present results case study involving approximately 11,000 lines code for European Space Agency. The provide empirical evidence very fast achieving substantial reductions size test suite.