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: test_httpresponses.rb
    path of file: ./repos/ruby/test/net/http
    
    the code of the file until where you have to start completion: # frozen_string_literal: false
require 'net/http'
require 'test/unit'

class HTTPResponsesTest < Test::Unit::TestCase
  def test_st
    
  def test_status_code_classes
    Net::HTTPResponse::CODE_TO_OBJ.each_pair { |code, klass|
      case code
      when /\A1\d\d\z/
        group = Net::HTTPInformation
      when /\A2\d\d\z/
        group = Net::HTTPSuccess
      when /\A3\d\d\z/
        group = Net::HTTPRedirection
      when /\A4\d\d\z/
        group = Net::HTTPClientError
      when /\A5\d\d\z/
        group = Net::HTTPServerError
      else
        flunk "Unknown HTTP status code: #{code} => #{klass.name}"
      end