Abstract
In this paper, an automatic protocol test case generator that generates both test sequence and test data is presented. The underlying model is an extended finite state machine (EFSM) and Estelle is used as the formal description language. First, test sequences are generated using a combined control and data flow testing method. A set of path conditions associated with each test sequence is obtained using symbolic execution techniques. By solving the path conditions as a group of constraints, test data are then automatically generated. A prototype system implementing the above procedures has been built. The system has been used to generate test cases for real protocols such as TP0, FDDI and LAPB, and has been integrated in the UBC protocol testing environment. >
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