You should be familiar with JUnit as it is what OpenMRS uses for unit testing. For my test, I used JUnit4. Please see The unit testing tutorial and The module unit testing tutorial for more information. It is assumed for the sake of this tutorial that you have read and understand those.
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Hop onto IRC; my nick is r0bby, and I'll be happy to answer any questions, my contact info is also available on my User page Unlicensed user, feel free to contact me with questions.
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