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_readline.rb
    path of file: ./repos/ruby-packer/ruby/test/readline
    
    the code of the file until where you have to start completion: # frozen_string_literal: false
require_relative "helper"
require "test/unit"
require "tempfile"
require "timeout"

module BasetestReadline
  INPUTRC = "INPUTRC"
  SAVED_ENV = %w[COLUMNS LINES]

  def setup
    @saved_env = ENV.values_at(*SAVED_ENV)
    @inputrc, ENV[INPUTRC] = ENV[INPUTRC], IO::NULL
  end

  def teardown
    ENV[INPUTRC] = @inputrc
    Readline.instance_variable_set("@completion_proc", nil)
    begin
      Readline.delete_text
      Readline.point = 0
    rescue NotImplementedError
    end
    Readline.special_prefixes = ""
    Readli
    
  def test_input_metachar
    omit "Skip Editline" if /EditLine/n.match(Readline::VERSION)
    # test will pass on Windows reline, but not readline
    omit "Won't pass on mingw readline.so using 8.0.001" if /mingw/ =~ RUBY_PLATFORM and defined?(TestReadline) and kind_of?(TestReadline)
    omit 'Needs GNU Readline 6 or later' if /mswin|mingw/ =~ RUBY_PLATFORM and defined?(TestReadline) and kind_of?(TestReadline) and Readline::VERSION < '6.0'
    bug6601 = '[ruby-core:45682]'
    Readline::HISTORY << "hello"
    wo = nil
    line = with_pipe do |r, w|
      wo = w.dup
      wo.write("\C-re\ef\n")
    end
    assert_equal("hello", line, bug6601)
  ensure
    wo&.close
    return if /EditLine/n.match(Readline::VERSION)
    Readline.delete_text
    Readline::HISTORY.clear
  end