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    Implementation relations and testing for cyclic systems with refusals and discrete time

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    JSS_Lefticaru_2020.pdf (353.5Kb)
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    Publication date
    2020-12
    Author
    Lefticaru, Raluca
    Hierons, R.M.
    Núñez, M.
    Keyword
    Model-based testing
    Implementation relations
    Cyclic systems
    Rights
    © 2020 Elsevier. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
    Peer-Reviewed
    Yes
    
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    Abstract
    We present a formalism to represent cyclic models and study di erent semantic frameworks that support testing. These models combine sequences of observable actions and the passing of (discrete) time and can be used to specify a number of classes of reactive systems, an example being robotic systems. We use implementation relations in order to formally define a notion of correctness of a system under test (SUT) with respect to a specification. As usual, the aim is to devise an extension of the classical ioco implementation relation but available timed variants of ioco are not suitable for cyclic models. This paper thus defines new implementation relations that encapsulate the discrete nature of time and take into account not only the actions that models can perform but also the ones that they can refuse. In addition to defining these relations, we study a number of their properties and provide alternative characterisations, showing that the relations are appropriate conservative extensions of trace containment. Finally, we give test derivation algorithms and prove that they are sound and also are complete in the limit.
    URI
    http://hdl.handle.net/10454/17953
    Version
    Accepted manuscript
    Citation
    Lefticaru R, Hierons RM and Núñez M (2020) Implementation relations and testing for cyclic systems with refusals and discrete time. The Journal of Systems & Software. 170: 110738.
    Link to publisher’s version
    https://doi.org/10.1016/j.jss.2020.110738
    Type
    Article
    Collections
    Engineering and Informatics Publications

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