A Framework for Testing Object Oriented Software Using Formal Speci cations

In this paper we develop a framework for semi-automated generation of test cases for object oriented programs from formal speci-cations. We use Object-Z as the formal speciication language. We have designed and prototyped a test system called OZTEST. It understands the characteristics of object-oriented speciications including inheritance. OZTEST maps the speciication to a corresponding implementation. Test shells generated from the given Object-Z speciication are stored as test scripts. OZTEST chooses the test shells to be executed in a particular test-session based on user given criteria. A test class is created by inheriting from the class being tested. The child class thus has all the features of the class being tested, in addition to the routines to test the parent. The results of the test are stored in a le for veriication.