Abstract. This paper presents a regression testing technique (and associated tool) for object-oriented software based on use cases. The basic models we use to describe use cases are UML statechart and collaboration diagrams. The technique combines, in fact, the analysis of these models to a simple static analysis of the code. The goal is to identify changes that may not be visible in design models (change in a method's body). The developed tool identifies modified (impacted by modifications) use cases and selects the appropriate test cases from an existing test suite. New test cases are generated when necessary. The selected test cases (including the new ones) are automatically executed. A case study is reported to provide evidence of the feasibility of the approach and its benefits (reduction of regression testing effort).
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