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    A verified and optimized Stream X-Machine testing method, with application to cloud service certification

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    Lefticaru_JSTVR.pdf (1.661Mb)
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    Publication date
    2020-05
    Author
    Simons, A.J.H.
    Lefticaru, Raluca
    Keyword
    State-based testing
    X-machines
    Specification
    Verification
    Functional testing
    Cloud computing
    Cloud service broker
    Service certification
    Test grounding
    Rights
    ©2020 The Authors. Software Testing, Verification & Reliability published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
    Peer-Reviewed
    Yes
    
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    Abstract
    The Stream X-Machine (SXM) testing method provides strong and repeatable guarantees of functional correctness, up to a specification. These qualities make the method attractive for software certification, especially in the domain of brokered cloud services, where arbitrage seeks to substitute functionally equivalent services from alternative providers. However, practical obstacles include: the difficulty in providing a correct specification, the translation of abstract paths into feasible concrete tests, and the large size of generated test suites. We describe a novel SXM verification and testing method, which automatically checks specifications for completeness and determinism, prior to generating complete test suites with full grounding information. Three optimisation steps achieve up to a ten-fold reduction in the size of the test suite, removing infeasible and redundant tests. The method is backed by a set of tools to validate and verify the SXM specification, generate technology-agnostic test suites and ground these in SOAP, REST or rich-client service implementations. The method was initially validated using seven specifications, three cloud platforms and five grounding strategies.
    URI
    http://hdl.handle.net/10454/17608
    Version
    Published version
    Citation
    Simons AJH and Lefticaru R (2020) A verified and optimized Stream X-Machine testing method, with application to cloud service certification. Software Testing, Verification and Reliability. 30(3): e1729.
    Link to publisher’s version
    https://doi.org/10.1002/stvr.1729
    Type
    Article
    Collections
    Engineering and Digital Technology Publications

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