Making progress on the main project

A while back, I finished the reference solution to the assignment I'm preparing for a CS class. This week I started in earnest on writing the test suites, which automatically test and grade student submissions. The assignment is broken up into six segments. Two segments now have test suites, including a very significant one that wraps up a lot of work. (I'm working backwards starting from the completed assignment so that I can produce "starter" code for each step as I go along.) That leaves four segments to go, but they're smaller and (hopefully) easier to test.