How to stub/mock XMLBeans object for testing?
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I'm working with an application using Apache XMLBeans (interfaces for XML structure elements extending org.apache.xmlbeans.XmlObject, implementations for those interfaces extending org.apache.xmlbeans.impl.values.XmlComplexContentImpl)

I got following kind of functionality:

 - An XML object is passed to a method with some data
 - Based on this data, subcontent is generated for this XML object
    - using XML objects' addFoo() to add elements etc

Now I'd like to have a test for this functionality but I'm not sure what is the best way to have this XML object for testing (I'd like the stub/mock object to maintain the subtree state to be easily tested). Some options:

 - I tried instantiating these FooImpl implementation objects but they require reference to org.apache.xmlbeans.SchemaType sType
   - Is there some way to instantiate these?
   - Giving null / mocked SchemaType ends up with NPE when something is added
 - Generating a stub classes with the few needed methods would work but ends up with many (> 100) methods to generate
 - Using Mockito works otherwise, but to have the xml tree structure state easily tested, I need to use doAnswer() etc

Some ideas?

br, Touko