You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: devise_generator_test.rb
    path of file: ./repos/devise/test/generators
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require 'test_helper'

require "generators/devise/devise_genera
    
  def copy_routes
    routes = File.expand_path("../../rails_app/config/routes.rb", __FILE__)
    destination = File.join(destination_root, "config")

    FileUtils.mkdir_p(destination)
    FileUtils.cp routes, destination
  end