Unmaintained notice: As of December 22nd 2017 this project will no longer be maintained. What started out as a creative experiment four years ago became a significant tool in Huddle's Web development workflow, as well as the workflows of external Web engineers. But like PhantomCSS, its time to move on. UI testing with decision trees. An experimental approach to UI testing, based on Decision Trees. A NodeJS wrapper for PhantomJS, CasperJS and PhantomCSS, PhantomFlow enables a fluent way of describing user flows in code whilst generating structured tree data for visualisation.