The TDD Tetrahedron has reached version 1.0.
As I write this, we have a course on advanced TDD with Robert C Martin as teacher. I took the opportunity to introduce the first version to the participants.
Uncle Bob and the TDD Tetrahedron.
Some of you that participated, asked me for a digital version which I mailed to you. I thought that there may be other people that are interested, so, here is the PDF for you to download. There is no read-me file but you only need scissors and tape.
The biggest change from the prototype I presented in an earlier post, is that the bottom is removed. It became easier to put it together that way.
I really tried to find some way to manufacture it in plastic or paper to a reasonable price, but failed. I also thought about doing a TDD pen, A pen with three sides where each side would be red, green or yellow in a similiar way to the tetrahedron, But that failed since the sides could not have different colors.
Anyway, if you have any clue on manufacturing any of these ideas, I will be happy to hear from you!