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_service.rb
    path of file: ./repos/jruby/test/jruby
    
    the code of the file until where you have to start completion: require 'test/unit'
require 'jruby'

class TestThreadService < Test::Unit::TestCase
  GC_COUNT = 10
  
  def setup
    @service = JRuby.runtime.thread_service
  end
  
  def wait_for_list_size(start_rt)
    start_time = Time.now
    until @service.ruby_thread_map.size == start_rt || (Time.now - start_time > 30)
      JRuby.gc
    end
  end
  
  def test_ruby_thread_leaks
    start_rt = @service.ruby_thread_map.size
    
    # spin up 100 threads and join them
    (1..10).to_a.map {Thread.new {}}.map(&:join)
    
    # access map and GC repeatedly for a while to flush things out
    wait_for_list_size(start_rt)
    
    # confirm the size goes back to the same
    assert_equal start_rt, @service.ruby_thread_map.size
  end

  def join_java_threads
    # spin up Java threads and join them
    #
    # In the IR interpreter, placing this loop in a separate method ensure
    
  def test_java_threads_in_thread_list
    svc = JRuby.runtime.thread_service
    start_list = Thread.list
    start_rt = @service.ruby_thread_map.size
    
    # spin up 100 Java threads and wait for them all to be ready
    state_ary = [false] * 10
    threads = (0..9).to_a.map do |i|
      t = java.lang.Thread.new do
        state_ary[i] = true
        Thread.pass while state_ary[i]
      end
      t.start
      t
    end
    
    # wait for them all to be running
    Thread.pass until state_ary.all?
    
    # check that Thread.list contains 100 more threads
    assert_equal start_list.size + 10, Thread.list.size
    
    # shut down all threads and wait for them to terminate
    0.upto(9) {|i| state_ary[i] = false}
    threads.map(&:join)
    threads = nil
    
    # access map and GC repeatedly for a while to flush things out
    wait_for_list_size(start_rt)
    
    # confirm the thread list is back to what it was
    assert_equal start_list, Thread.list
  end
end