Towards Testing Concurrent Objects in CLP

Testing is a vital part of the software development process. It is even more so in the context of concurrent languages, since due to undesired task interleavings and to unexpected behaviours of the underlying task scheduler, errors can go easily undetected. This paper studies the extension of the CLP-based framework for glass-box test data generation of sequential programs to the context of concurrent objects, a concurrency model which constitutes a promising solution to concurrency in OO languages. Our framework combines standard termination and coverage criteria used for testing sequential programs with specific criteria which control termination and coverage from the concurrency point of view, e.g., we can limit the number of task interleavings allowed and the number of loop unrollings performed in each parallel component, etc. 1998 ACM Subject Classification D.2.5 Testing and Debugging, D.1.3 Concurrent Programming, D.1.6 Logic Programming, D.1.5 Object-oriented Programming