Remote Testing of Timed Specifications

We present a study and a testing framework on black box remote testing of real-time systems using UPPAAL TIGA. One of the essential challenges of remote testing is the communication latency between the Tester and the System Under Test (IUT) that may lead to interleaving of inputs and outputs. This affects the generation of inputs for the IUT and the observation of outputs that may trigger a wrong test verdict. We model the overall test setup using Timed Input-Output Automata (TIOA) and present an adapted asynchronous semantics with explicit communication delays. We propose the Delta-testability criterion for the requirement model where Delta describes the communication latency. The test case generation problem is then reduced into a controller synthesis problem. We use UPPAAL TIGA for this purpose to solve a timed game with partial observability between the tester and the communication media together with the IUT. The objective of the game corresponds to a test purpose.