Following situation: you have written some generic stub to use in your projects that creates a client for a service. Your client is smart and does some magic for connections (proxy, cache or other kind of magic). Or maybe you just have written a service for that matter. Anyway, you now want to test it. Unit testing the functionality of your methods is a must. But you still want to reach 100% coverage and need to test the service as it would run in real life. Then you can use the javax.xml.ws.Endpoint class. If you prefer figuring it out yourself, you can find the code (as a project for netbeans) -- here -- To follow the code examples as html click --here-- So here is how you do it: If you've coded nothing fancy, then you probably have a class like this: This is a generic client for opening connections to services. It gives you back a port of the type of your service where you can call your operation as a method of the port. It is very convenient if you h