Nathalie Bertrand ; Thierry Jéron ; Amélie Stainer ; Moez Krichen - Off-line test selection with test purposes for non-deterministic timed automata

lmcs:1037 - Logical Methods in Computer Science, October 17, 2012, Volume 8, Issue 4 - https://doi.org/10.2168/LMCS-8(4:8)2012
Off-line test selection with test purposes for non-deterministic timed automataArticle

Authors: Nathalie Bertrand ORCID; Thierry Jéron ORCID; Amélie Stainer ; Moez Krichen

    This article proposes novel off-line test generation techniques from non-deterministic timed automata with inputs and outputs (TAIOs) in the formal framework of the tioco conformance theory. In this context, a fi?rst problem is the determinization of TAIOs, which is necessary to foresee next enabled actions after an observable trace, but is in general impossible because not all timed automata are determinizable. This problem is solved thanks to an approximate determinization using a game approach. The algorithm performs an io-abstraction which preserves the tioco conformance relation and thus guarantees the soundness of generated test cases. A second problem is the selection of test cases from a TAIO speci?fication. The selection here relies on a precise description of timed behaviors to be tested which is carried out by expressive test purposes modeled by a generalization of TAIOs. Finally, an algorithm is described which generates test cases in the form of TAIOs equipped with verdicts, using a symbolic co-reachability analysis guided by the test purpose. Properties of test cases are then analyzed with respect to the precision of the approximate determinization: when determinization is exact, which is the case on known determinizable classes, in addition to soundness, properties characterizing the adequacy of test cases verdicts are also guaranteed.


    Volume: Volume 8, Issue 4
    Published on: October 17, 2012
    Imported on: October 14, 2011
    Keywords: Computer Science - Formal Languages and Automata Theory,D.2.4,D.2.5,D.4.7,F.1.1

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