net.onedaybeard.artemis:artemis-fluid-core-utility-sources (maven):  Provides a testing framework for support classes that are generated when using fluid entities. Since E.class and SuperMapper.class are not available at this point we resort to a bit of trickery so we can at least test the utility classes. fluid-core will pick up /src/test/java/com/artemis/ as resources (see /target/classes/fluid-entity-sources/) FluidGenerator can be made to deploy these while generating E and SuperMapper. See fluid-core pom which files are packaged as resources. Add new files to be deployed to FluidGenerator.generate manually! 
Keywords: artemis-odb|entity-component-system|framework|gamedev|gamedev-framework|gamedev-library