How to test json output from json plugin?

[Jim Talbut]

Hi,

I've got an action declared as:
@Results( {
    @Result( name="success", type="json", params={ "root", "schools" } )
})
@Namespace("/json")
@ParentPackage("json-default")
public class SchoolSearchAction extends ActionSupport {


and I have a test class that is able to get hold of the actionProxy, the 
actionInvocation, etc.

The question is, how, from the test class can I get hold of the json produced 
by the JSON result?

Thanks

Jim