Testing your processes is an important tasks to ensure and validate your expected behaviour of your application. An introduction how to do a proper test automation in process applications can be found the following camunda webinar: https://network.camunda.org/webinars/24
A normal approach for testing your processes is to have your actual service implementation mocked or swapped completely to your own implementation for testing purposes. For CDI based java delegates this is an easy task to do within the camunda BPM test environment.
But if your project does not allow you to rely on your favourite CDI or Spring based environment you have to configure your java delegates for service tasks via class name binding. Unfortunately there seems not to be an out of the box approach to test that kind of configuration easily.
Will will show you how to get use of the great extensibility of the camunda BPM engine to have plain java delegates mocked as easy as their CDI/Spring counterparts.