Model-based Testing from Input Output Symbolic Transition Systems Enriched by Program Calls and Contracts

Imen Boudhiba (1, 2) , Christophe Gaston (2) , Pascale Le Gall (1) , Virgile Prévosto (2)

1 MICS - Mathématiques et Informatique pour la Complexité et les Systèmes
2 DILS - Département Ingénierie Logiciels et Systèmes

An Input Output Symbolic Transition System (IOSTS) specifies all expected sequences of input and output messages of a reactive system. Symbolic execution over this IOSTS then allows to generate a set of test cases that can exercise the various possible behaviors of the system it represents. In this paper, we extend the IOSTS framework with explicit program calls, possibly equipped with contracts specifying what the program is supposed to do. This approach bridges the gap between a model-based approach in which user-defined programs are abstracted away and a code-based approach in which small pieces of code are separately considered regardless of the way they are combined. First, we extend symbolic execution techniques for IOSTS with programs, in order to re-use classical test case generation algorithms. Second, we explore how constraints coming from IOSTS symbolic execution can be used to infer contracts for programs used in the IOSTS.

Keywords: Input Output Symbolic Transition Systems; Program Con- tracts; Model-based Testing; Symbolic Execution; Feasibility

Domains: Computer Science [cs]

Imen Boudhiba, Christophe Gaston, Pascale Le Gall, Virgile Prévosto. Model-based Testing from Input Output Symbolic Transition Systems Enriched by Program Calls and Contracts. The 27th IFIP International Conference on Testing Software and Systems (ICTSS-2015) , Nov 2015, Sharjah and Dubai, United Arab Emirates. ⟨cea-01810689⟩