Generating tests from B specifications and dynamic selection criteria

This paper is about generating tests from dynamic selection criteria called test purposes, in addition to structural tests, obtained from static selection criteria. We present a method that re-uses a behavioral model and an abstract test concretization layer developed for structural testing, and relies on additional test purposes. We propose, in the B framework, a process of test generation that uses the symbolic animation mechanisms of Leirios Test Generator (LTG) based on constraint solving, and guided by the test purposes. We build for that a B model that is the synchronized product of a behavioral B abstract model and a test purpose described as a labeled transition system. We prove the correctness of this method, and show some experimental results obtained on the IAS case study. IAS is an industrial smart-card platform dedicated to the operations of Identification, Authentication and electronic Signature. Our experiments show that the tests obtained from test purposes are complementary to the structural tests.