DLUnit: A Unit Testing Framework for Simulated Digital Logic Circuits

We present DLUnit, a unit test framework for simulated digital logic circuits. DLUnit provides a quick and easy way to verify that a simulated digital logic circuit works as expected. It is based on JUnit in order to present a low learning curve to students. This testing ability benefits both instructors and students. It benefits instructors by automating the process of verifying the correctness of student submissions, thereby saving time. It benefits students by providing an easy (and familiar) way to test their assignments before submitting them, thereby helping them correct mistakes and misconceptions in a more timely manner. Furthermore, DLUnit can be used to provide students additional testing experience; therefore, it can serve as one component of a curriculum-wide emphasis on testing. DLUnit currently supports JLS and Logisim; but, is designed to be readily extended to work with other digital logic simulators.