How to test anonymous classes?

Question

I believe you should be familiar with this idiom, which is some kind of Java excuse for closing

//In the "Resource Manager" class
public void process(Command cmd){
  //Initialize
  ExpensiveResource resource = new ExpensiveResource();
  //Use
  cmd.execute(resource);
  //Release / Close
  resource.close();
}

//In the Client class...
manager.process(new Command(){

  public void execute(ExpensiveResource res){
    //Do things with the resource
  }
});

I used this idiom / template a lot, but recently I tried to test it and it gave me a headache ...

How can you test the isolated class ResourceManager and Client? I have found that it is so closely related to them that you cannot do it easily.

Ideas appreciated.

Hello

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