Modelling And Design Of The Formal Approach
For Generating Test Sequences Of ETCS Level 2
Based On The CPN
Author(s)
X. Zhao, Y. Zhang, W. Zheng, T. Tang & R. Mu
Abstract
ETCS Level 2 (European Train Control System Level 2, ETCS-2) has drawn
particularly attention from researchers and industries. A new CPN model-based
formal approach for test cases and sequences generation is proposed in this paper
to increase the test automation degree of the ETCS-2 system and subsystems.
In this paper, a set of modelling rules is presented firstly to make the
Coloured Petri Net (CPN) model more suitable for test generation. Then, an
automated test approach is described in detail, which includes an automatic test
case generating algorithm and a type of automatic test sequence searching
algorithm. The generated set of test cases satisfies specified coverage. The test
sequence searching algorithm guarantees the results satisfying the minimum
number of test sequences covering all test cases. The output of this approach is a
set of well-formed XML (Extensible Markup Language) file to increase the
automation degree of the test executing process. Finally, a partial model of
ETCS-2 On-Board subsystem is built and analysed using the CPN Tools as a
case study. The model-based formal approach is implemented on this model and
the test cases and test sequences are all generated in a form of XML. The
conclusion show that the CPN-model based testing approach can be used to
improve the automation of the testing procedure and the generated test cases can
meet the relative requirement.
Keywords: ETCS-2, CPN, test generation, formal method.
Keywords
ETCS-2, CPN, test generation, formal method
Related Book
Other papers in this volume
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