We present a model-driven test environment called Visual ScatterUnit, which optimizes the application testing process of wireless sensor networks. Instead of having to implement the test case completely manually, the model-driven test environment allows the abstract modeling of the test process. At the same time the test case's technical implementation requirements are kept hidden from the user. In the following a code generator is able to create the necessary test case code, which complies with technical requirements from the test case model. The test case is executed with the help of Visual ScatterUnit and the test results are subsequently visualized in the test case model's diagrams. In this way the user can easily comprehend the test run and consequently understand the cause of failure. Furthermore the test case's abstract modeling allows it to be validated, which brings with it a quality assurance for the executable test case.
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