Using status messages in the distributed test architecture |
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| Authors: | RM Hierons |
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| Affiliation: | 1. Vincit Ltd, Tampere, Finland;2. Department of Pervasive Computing, Tampere University of Technology, Tampere, Finland;1. Brazilian Federal Court of Accounts, Brazil;2. Federal University of Pará, Brazil;3. University of Brasília, Brazil;1. University of Central Lancashire, Preston PR1 2HE, UK;2. The Open University, Walton Hall, Milton Keynes MK7 6AA, UK;1. Blekinge Institute of Technology, Karlskrona, Sweden;2. SINTEF ICT, Trondheim, Norway |
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| Abstract: | If the system under test has multiple interfaces/ports and these are physically distributed then in testing we place a tester at each port. If these testers cannot directly communicate with one another and there is no global clock then we are testing in the distributed test architecture. If the distributed test architecture is used then there may be input sequences that cannot be applied in testing without introducing controllability problems. Additionally, observability problems can allow fault masking. In this paper we consider the situation in which the testers can apply a status message: an input that causes the system under test to identify its current state. We show how such a status message can be used in order to overcome controllability and observability problems. |
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