Currently in my tests I do something like this to test if an email is queued to be sent

    assert_difference('ActionMailer::Base.deliveries.size', 1) do       
        get :create_from_spreedly, {:user_id => @logged_in_user.id}
    end

but if i a controller action can send two different emails i.e. one to the user if sign up goes fine or a notification to admin if something went wrong - how can i test which one actually got sent. The code above would pass regardless.