How do you stub all methods of a particular mock instance

Question

I have a particular mock that is being handled by a third party. I just want to check that the same mock has been returned back.

However, the third party calls array methods and save methods that my test doesnt really care about. Is there a way to tell my mock that it expects/stub all methods to do with that particular mock instance?

eg.

user = mock(User)
user.stub_all

Thanks!

EDIT

More info about the problem:

Test:

  it "creating an invitation should return invitation" do
    invitation = mock_model(Invitation)
    invitation.stub(:[]=)
    invitation.stub(:save)
    Invitation.stub(:create).and_return(invitation)
    @user.create_invitation
    @user.create_invitation.should == invitation        
  end

Code being tested:

 def create_invitation
    invitation = Invitation.create
    self.invitations.push(invitation)
    return invitation
  end

I need to mock the following which are not directly related to what I am testing:

invitation.stub(:[]=)
invitation.stub(:save)

Answer 1

The answer is

user = mock(User).as_null_object

but in general this approach means your objects are too large and your tests aren't granular enough