Where should I start my conversion/creation of a JUnit test suite within the JT harness?
If you have not used the JT harness before, you should first run the tutorial — Chapter 2 in the JavaTest Architect’s Guide. You will find a link to the JavaTest Architect’s Guide can find on the JT Harness Documentation page. The tutorial will familiarize you with how the harness behaves with a working test suite so you will know what the goal is when creating your JUnit suite. The JavaTest User’s Guide will also help you understand how the harness works. After you familiarize yourself with the harness, read the JUnit integration section of the JavaTest Architect’s Guide (Chapter 12). To fully understand that section, you should also read at least the introduction to Chapter 6 (Configuration Interview) and 9 (Test Finder), parts of Chapter 4 (Creating a Test Suite) all of Chapters 3 and 8. This should give you enough background to start playing with files.