Droidcon 2013 Gradle workshop is an example project. It shows how to write Unit and Integration tests.
Frodo is an android library inspired by Hugo, mainly used for logging RxJava Observables and Subscribers outputs on the logcat. It generates and weaves code based on annotations only on debug versions of the application where the plugin is applied, for instance, it is safe to persist any Frodo annotation in the codebase.