require 'test/unit'


class TestThreadGroup < Test::Unit::TestCase

  def test_00sanity
    tg = ThreadGroup::Default
    assert(tg.list.include? Thread.current)
  end

  def test_add
    tg = ThreadGroup.new
    pre_size = ThreadGroup::Default.list.length
    tg.add(Thread.current)
    assert_equal(1, tg.list.length)
    assert_equal(pre_size - 1, ThreadGroup::Default.list.length)
    ThreadGroup::Default.add(Thread.current)
    assert_equal(0, tg.list.length)
    assert_equal(pre_size, ThreadGroup::Default.list.length)
  end

  def test_list
    tg = ThreadGroup.new
    10.times do
      t = Thread.new { Thread.stop }
      tg.add(t)
    end
    assert_equal(10, tg.list.length)
    tg.list.each do |t|                                                                                                                                  
      Thread.pass while (t.status != "sleep")                                                                                                            
      t.wakeup                                                                                                                                           
      t.join                                                                                                                                             
    end                     
  end

  def test_s_new
    tg = ThreadGroup.new
    assert_equal(0, tg.list.length)
  end

end