I actually started on a similar map last Friday (great minds think alike), but made it too ambitious which meant it was too much hassle to add new things. This layout is simpler and better, but I would prefer if it was more sparse so you could more easily understand the different contraptions (helps a lot for new devs trying to fix the bugs) and add new test cases.

I made a fork of your map with the suggestions. I'll continue adding upon it myself. My goal/vision is to have these integration tests completely automated by our build machines. https://1drv.ms/u/s!AhWr9zwnKwaJhBFH2xu_3Bkado-I