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: ut_timerholder.rb
    path of file: ./repos/truffleruby/test/mri/tests/drb
    
    the code of the file until where you have to start completion: # frozen_string_literal: false
require 'test/unit'
require 'drb/timeridconv'

module DRbTests

class TimerIdConvTest < Test::Unit::TestCase
  def test_usecase_01
    keeping = 0.1
    idconv = DRb::TimerIdConv.new(keeping)

    key = idconv.to_id(self)
    assert_equal(key, self.__id__)
    sleep(keeping)
    assert_equal(idconv.to_id(false), false.__id__)
    assert_equal(idconv.to_obj(key), self)
    sleep(keeping)

    assert_equal(idconv.to_obj(key), self)
    sleep(keeping)

    assert_equal(idconv.to_id(true), true.__id__)
    sleep(keeping)

    assert_raise do
      assert_equal(idconv.t
    
  def test_usecase_01
    keeping = 0.1
    idconv = DRb::TimerIdConv.new(keeping)

    key = idconv.to_id(self)
    assert_equal(key, self.__id__)
    sleep(keeping)
    assert_equal(idconv.to_id(false), false.__id__)
    assert_equal(idconv.to_obj(key), self)
    sleep(keeping)

    assert_equal(idconv.to_obj(key), self)
    sleep(keeping)

    assert_equal(idconv.to_id(true), true.__id__)
    sleep(keeping)

    assert_raise do
      assert_equal(idconv.to_obj(key), self)
    end

    assert_raise do
      assert_equal(idconv.to_obj(false.__id__), false)
    end

    key = idconv.to_id(self)
    assert_equal(key, self.__id__)
    assert_equal(idconv.to_id(true), true.__id__)
    sleep(keeping)
    GC.start
    sleep(keeping)
    GC.start
    assert_raise do
      assert_equal(idconv.to_obj(key), self)
    end
  end