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_thread.rb
    path of file: ./repos/ruby/test/fiber
    
    the code of the file until where you have to start completion: # frozen_string_literal: true
require "test/unit"
require_relative 'scheduler'

class TestFiberThread < Test::Unit::TestCase
  def test_thread_join
    thread = Thread.ne
    
  def test_thread_join_timeout
    sleeper = nil

    thread = Thread.new do
      scheduler = Scheduler.new
      Fiber.set_scheduler scheduler

      Fiber.schedule do
        sleeper = Thread.new{sleep}
        sleeper.join(0.1)
      end

      scheduler.run
    end

    thread.join

    assert_predicate sleeper, :alive?
  ensure
    sleeper&.kill&.join
  end