Developing a TTCN-3 test harness for legacy software

Authors:
Joseph C. Okika;Anders P. Ravn;Zhiming Liu;Lokesh Siddalingaiah
Affiliations:
The United Nations University, Macao;Aalborg University, Denmark;The United Nations University, Macao;Aalborg University, Denmark
Venue:
Proceedings of the 2006 international workshop on Automation of software test
Year:
2006

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Abstract

We describe a prototype test harness for an embedded system which is the control software for a modern marine diesel engine. The operations of such control software requires complete certification. We adopt Testing and Test Control Notation (TTCN-3) to define test cases for this purpose. The main challenge in developing the test harness is to interface a generic test driver to the legacy software and provide a suitable interface for test engineers. The main contribution of this paper is a demonstration of a suitable design for such a test harness. It includes: a TTCN-3 test driver in C++, the legacy control software in C, a Graphical User Interface (GUI)and the connectors in Java. Our experience shows that it is feasible to use TTCN-3 in developing a test harness for a legacy software for an embedded system, even when it involves different heterogeneous components.