build the tests (see below)
create a new Cordova app using the Cordova app. This is just a standard Cordova app that uses the barcode scanner plugin.
fire up the desktop app by opening the desktop app in your desktop browser.
run the Cordova app
the Cordova app will prompt you to scan an image currently displayed in the desktop app. Presumably, it will scan, and check the scan output. Once scanned, or if you cancel, it will move to the next image to test. The final tally is displayed when all the images have been scanned.

Building the tests

Run make build in this directory. It will:

copy the desktop-app/images files to phonegap-app/images
create a .json file with the image scan results, copying it into desktop-app and phonegap-app