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Web service composition is most mature and effective way to realize the rapidly changing requirements of business in service-oriented solutions. Testing the compositions of web services is complex, due to their distributed nature and asynchronous behaviour. Colored Petri Nets (CPNs) provide a framework for the design, specification, validation and verification of systems. In this paper the CPN model used for composition design verification is reused for test design purpose. The authors propose an on-the-fly algorithm that generates a test suite that covers all possible paths without redundancy. The prioritization of test sequences, test suite size and redundancy reduction are also focused.
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