Christophe Gaston

Learn More
We propose an approach to test whether a system conforms to its specification given in terms of an Input/Output Symbolic Transition System (IOSTS). IOSTSs use data types to enrich transitions with data-based messages and guards depending on state variables. We use symbolic execution techniques both to extract IOSTS behaviours to be tested in the role of(More)
In a Model Driven Design process, model refinement methodologies allow one to denote system behaviors at several levels of abstraction. In the frame of a model-based testing process, benefits can be taken from such refinement processes by extracting test cases from the different intermediate models. As a consequence, test cases extracted from abstract(More)
In a component oriented approach, components are designed, developed and validated in order to be widely used. However one cannot always foresee which specific uses will be made of components depending on the system they will constitute. In this paper we propose an approach to test each component of a system by extracting accurate behaviours using(More)
An orchestrator in a Web Service system is a locally deployed piece of software used both to allow users to interact with the system and to communicate with remote components (Web Services) in order to fulfill a goal. We propose a symbolic model based approach to test orchestrators in the context of the systems they pilot. Our approach only takes as input a(More)
We propose a model-based black-box testing approach to test conformance of Web Service Compositions (WSC). When a WSC under test makes use of implementations of Web Services, two situations may occur: either communications between the WSC and the Web Services are observable or hidden internal actions. We show by means of an example how to generate test(More)
In early design phases, system models can be characterized as intended interactions between black box components. Moreover, when dealing with embedded systems, it is usual that interactions are constrained by timing issues. We propose to represent such system models as structured scenarios by using UML sequence diagrams specialized with the MARTE profile to(More)
Model-based conformance testing of reactive systems consists in taking benefit from the model for mechanizing both test data generation and verdicts computation. On-line test case generation allows one to apply adaptive on-the-fly analyzes to generate the next inputs to be sent and to decide if observed outputs meet intended behaviors. On the other hand, in(More)