Regression Testing of Composite Service: An XBFG-Based Approach

During the evolution and maintenance of service composition, regression testing is inevitable and significant. Process alteration, static binding alteration and dynamic binding alteration are three main evolution styles. In order to guarantee the functional availability during evolution of these three types, this paper proposes a service-composition oriented regression testing approach toward services composed using BPEL. Change detection, change impact analysis and test case generation are integrated in this solution. For the sake of selecting and generating test cases for regression testing, which is the key issue discussed here, this approach uses eXtensible BPEL Flow Graph (XBFG for short) with additive information in each kind of element to identify the changes of composite service and operate change impact analysis. Case study shows that this approach could achieve the given goal. In general, this solution covers main aspects of functional regression testing on composite service.