Fault Coverage Measurement of a Timed Test Case Generation Approach

Ensuring that a Real-Time Embedded System(RTES) is absent of major faults that may affect the way it performs is a non-trivial task. RTES behaviour is based on the interactions with its surrounding environment and on the timing characteristics of that same environment. As a result, time poses a new dimension to the complexity of the testing process. In previous research, we introduced a `priority-based´ approach which tested the logical and timing behaviour of an RTES modeled formally as Uppaal automata. The `priority-based´ approach was based on producing sets of timed test traces by achieving timing constraints coverage according to three sets of priorities, namely boundary, out-boundary and in-boundary. In this paper, we extend that work by validating the `priority-based´ approach according to a well-known timed fault model. The validation process shows promising results, notably, that the `priority-based´ approach is capable of detecting all the fault types included in the proposed fault model.