Novel techniques and a toolset are presented for automatically testing the conformance of software implementations against partial behavioral models constituted by a set of parameterized UML sequence diagrams (SDs), describing both external and internal interactions. Test code is automatically generated from the SDs and executed on the Java implementation under test, and test results and coverage information are presented back visually in the model. A runtime test library handles internal interaction checking, test stubs, and user interaction testing. Incremental conformance checking is achieved by first translating SDs to non-deterministic acceptance automata with parallelism.
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