Testing of concurrent programs based on Message Sequence Charts

Most prior work on specification-based testing of concurrent programs have postulated an equivalence relation between specifications and programs. However, the equivalence relation, which requires a specification and a program to encompass the same set of synchronization sequences, is nor well-suited for testing concurrent programs against partial and nondeterministic specifications. In this paper; we present a new specification-based approach to resting concurrent programs againist Message Sequence Charts(MSCs) with partial and nondeterministic semantics. New conformance relations, named behavioral conformance and nondeterminacy conformance, are defined and the details of the proposed testing methodology based on the conformance relations are given. The effectiveness of our testing approach is investigated using a telephone switching system example.