A simple example of a Maven project built on GitHub Actions (on Linux, macOS and Windows) with UI, UI Unit and Integration Tests with AssertJ Swing, and MongoDB
An example of Chapter UI tests of the book
Test-Driven Development, Build Automation, Continuous Integration (with Java, Eclipse and friends) by Lorenzo Bettini.
See https://github.com/LorenzoBettini/tdd-buildautomation-ci-book-examples for the list of all the examples.