For large and complex composite Web services which are composed by BPEL and a set of WSDL and XSD documents, we urgently need the aid of the tools in designing and selecting test cases. However, most of mature testing tools which generate test data with the information of WSDL are used for single service while the research for composition remains in the realm of theory. So we apply the theory of data-flow testing and try to develop a testing tool for Web services composition which can automatically detects harmful data-flow anomalies and generate test paths according to all kinds of data flow coverage criteria.
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