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_io_wait.rb
    path of file: ./repos/ruby-packer/ruby/test/io/wait
    
    the code of the file until where you have to start completion: # -*- coding: us-ascii -*-
# frozen_string_literal: false
require 'test/unit'
require 'timeout'
require 'socket'
begin
  require 'io/wait'
rescue LoadError
end

class TestIOWait < Test::Unit::TestCase

  def setup
   
    
  def test_wait_eof
    q = Thread::Queue.new
    th = Thread.new { q.pop; @w.close }
    ret = nil
    assert_nothing_raised(Timeout::Error) do
      q.push(true)
      Timeout.timeout(0.1) { ret = @r.wait }
    end
    assert_equal @r, ret
  ensure
    th.join
  end