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Colloquium - Orso

Regression Test Selection for Java Software
Georgia Tech
10/31/2002
3:30pm-4:30pm

As software evolves during development and maintenance, regression testing is applied to modified versions of the software to provide confidence that the changed parts behave as intended and that the unchanged parts have not been adversely affected by the modifications. To reduce the cost of regression testing, test cases are selected from the test suite that was used to test the original version of the software -- this process is called Regression Test Selection (RTS). A safe RTS algorithm selects every test case in the test suite that may reveal a fault in the modified software. Safe RTS techniques can help to reduce the time required to perform regression testing because they select only a portion of the test suite for use in the testing but guarantee that the faults revealed by this subset will be the same as those revealed by running the entire test suite.

This presentation discusses the first safe RTS technique that, based on the use of a suitable representation, handles the features of the Java language. Furthermore, unlike other safe regression test selection techniques, the presented technique also handles incomplete programs. The technique can thus be safely applied in the (very common) case of Java software that uses external libraries or components; the analysis of the external code is not required for the technique to select test cases for this kind of software.

The presentation also describes DejaVOO, an RTS system that implements our technique and a set of empirical studies that demonstrate the potential savings that can be achieved using our technique on real subjects. These studies show that, for the considered subjects, our RTS technique can be effective in reducing the size of the test suite.

Alessandro Orso received his PhD in Computer Science from Politecnico di Milano, Italy, in 1999. He is now a research faculty in the College of Computing at the Georgia Institute of Technology. His research interests are in software engineering, with particular emphasis on software testing and analysis.

Hosted by Antonio Carzaniga.
Refreshments will be served immediately following the talk in ECOT 831.

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