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: spec_auth_digest.rb
    path of file: ./repos/ferrocarril/mruby-gems/vendor/ruby/2.6.0/gems/rack-2.0.7/test
    
    the code of the file until where you have to start completion: require 'minitest/autorun'
require 'rack/auth/digest/md5'
require 'rack/lint'
require 'rack/mock'

describe Rack::Auth::Digest::MD5 do
  def realm
    'WallysWorld'
  end

  def unprotected_app
    Rack::Lint.new lambda { |env|
      friend = Rack
    
  def request_with_digest_auth(method, path, username, password, options = {}, &block)
    request_options = {}
    request_options[:input] = options.delete(:input) if options.include? :input

    response = request(method, path, request_options)

    return response unless response.status == 401

    if wait = options.delete(:wait)
      sleep wait
    end