Black-box Testing Tool Of Railway
Signalling System Software With A Focus On
User Convenience
Author(s)
J.-G. Hwang, J.-H. Baek, H.-J. Jo & K.-M. Lee
Abstract
A railway signalling system is the control equipment performing vital functions,
and the validation on functional safety of its software is a very important issue.
Recently, various software testing tools have been applied to verify signalling
system software. However, these tools are unable to support black-box testing to
verify the functional safety of embedded signalling system software, and few
black-box testing tools are currently commercialized. Since most of these
commercialized black-box testing tools depend on a testing method through
direct accessing to the target memory under test, there are a lot of difficulties
when applying them to the test. In the case of using the existing tool, it is
possible to test them only if the internal memory addresses values that are
occupied by the executing embedded software. Therefore they are rarely utilized
to verify the embedded software in the actual operating environment. To
overcome these problems, this study developed a black-box testing tool using
communication interfaces which are utilized when actually operating. The real
interface channel is used as an input and monitoring channel for black-box
testing. This approach carries out the test in a manner where the test data are
input and the results are fed back to these interface channels by utilizing
interface channels with other signalling equipment already operating. Boundary
value analysis and equivalence class analysis modules were used to generate test
cases within the developed new testing tool. The pilot of the proposed testing
tool has been completed, and the feasibility study is now in progress with
railway signalling system software in Korea as its test target.
Keywords: railway signalling systems, software testing, black-box testing.
Keywords
railway signalling systems, software testing, black-box testing.
Related Book
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