EmbeddedApplicationSupport.getServer().RatpackServerBuilder.build(LaunchConfig), using the launch config returned by LaunchConfigEmbeddedApplication.createLaunchConfig().ApplicationUnderTest requirements.Handler (for unit testing handler implementations).Handler.Handler.BaseDirBuilder implementation that uses a Jar file as the base.EmbeddedApplication that starts a server based on a subclass provided LaunchConfig.BaseDirBuilder that is based on an initial Path.