GUI regression testing based on function-diagram

Regression testing which is part of the software life cycle costs much time in the whole process of testing, especially in GUI (Graphical User Interface) testing. Thus aiming at the object-oriented software, we propose a method called function-diagram based regression testing. GUI is described by function-diagram; regression testing cases are selected by the comparison between the previous function-diagram and the later one. It proves both in theory and practice that this kind of regression testing strategy of test case selection can promote the efficiency of regression testing and reduce the testing costs.