Is there a replacement for Fest, such that the replacement could drive a Java Swing UI in a blackbox manner (not JUnit) and enable BDD? Fest (https://code.google.com/p/fest/, http://fest.easytesting.org) has been abandoned since 2013 (https://github.com/alexruiz/fest-swing-1.x) as given by its GitHub project.
Java BDD tools such as cucumber (https://cucumber.io) and jbehave (http://jbehave.org) allow JUnit whitebox style, high-level integration testing, but do not drive the Swing UI from the outside in a blackbox manner.
Switching the UI from Swing to JavaFX is not an option due to human resource constraints.
The current related question is behind the times