That means you can install it using npm:
sudo npm install -g urchin
If you’re not hipster enough to use npm then you can still wget it from github:
chmod +x urchin
For Urchin, a test is just a program that has exit status 0 for success, and non-0 for fail. Put them all in a directory called test and run:
I’ve been using it organise and run the tests for one of my sillier recent projects.