Model-Based Mutation Testing of an Industrial Measurement Device

MoMuT::UML

is a model-based mutation testing tool for UML models. It maps UML state machines to a formal semantics and performs a conformance check between an original and a set of mutated models to automatically generate test cases. The resulting test suite is able to detect whether a system under test implements one of the faulty models instead of the correct, original model. In this work, we illustrate the whole model-based mutation testing process by means of an industrial case study. We test the control logic of a device that counts the particles in exhaust gases. First, we model the system under test in UML. Then,

MoMuT::UML

is used to automatically generate three test suites from the UML test model: one mutation-based test suite, one set of random test cases, and a third test suite combining random and mutation-based test case generation. The test cases are executed on the system under test and effectively reveal several errors. Finally, we compare the fault detection capabilities of the three test suites on a set of faulty systems, which were created by intentionally injecting faults into the implementation.