This is a blinking led example using artoo and minitest.
The equivalent C++ version is in blinking.ino. You can upload the
program by running make upload if you have arduino-mk installed or
simply use the arduino IDE.
The ruby version is in blinking.rb, using artoo requires installing
firmata on your arduino. Run ./install.sh to run bundle install,
download gort and upload the firmware to your arduino. Note, you may
have to update the shell script to work for other OS and/or raspberry
pi.
Once you installed firmata on your arduino, ruby blinking.rb should
run your app.
Run ruby -I.:spec spec/blinking_spec.rb to run the specs. The specs
don't require the arduino to be connected (it is mocked out).