return require('lib/tap')(function (test)

  test("test threadpool with return none", function(print,p,expect,_uv)
    local work_fn = function() end
    local after_work_fn = function() end
    local work_ctx = _uv.new_work(work_fn, after_work_fn)

    work_ctx:queue()
  end)

  test("test threadpool", function(print,p,expect,_uv)
    p('Please be patient, the test cost a lots of time')
    local count = 1000 --for memleaks dected
    local step = 0
    local ctx
    ctx = _uv.new_work(
        function(n,s) --work,in threadpool
            local uv = require('luv')
            local t = uv.thread_self()
            uv.sleep(10)
            return n, n*n, t, s
        end,
        function(n,r,id, s)
            assert(n*n==r)
            assert(#s==4096)
            if step < count then
                _uv.queue_work(ctx,n,s)
                step = step + 1
                if (step % 100==0) then
                    p(string.format('run %d%%', math.floor(step*100/count)))
                end
            else
              ctx = nil
            end
        end    --after work, in loop thread
    )
    local ls = string.rep('-',4096)

    _uv.queue_work(ctx,2,ls)
    _uv.queue_work(ctx,4,ls)
    _uv.queue_work(ctx,6,ls)
    _uv.queue_work(ctx,-2,ls)
    _uv.queue_work(ctx,-11,ls)
    _uv.queue_work(ctx,2,ls)
    _uv.queue_work(ctx,4,ls)
    _uv.queue_work(ctx,6,ls)
    _uv.queue_work(ctx,-2,ls)
    _uv.queue_work(ctx,-11,ls)
    _uv.queue_work(ctx,2,ls)
    _uv.queue_work(ctx,4,ls)
    _uv.queue_work(ctx,6,ls)
    _uv.queue_work(ctx,-2,ls)
    _uv.queue_work(ctx,-11,ls)
    _uv.queue_work(ctx,2,ls)
    _uv.queue_work(ctx,4,ls)
    _uv.queue_work(ctx,6,ls)
    _uv.queue_work(ctx,-2,ls)
    _uv.queue_work(ctx,-11,ls)
  end)

  test("test threadpool with async", function(print,p,expect,_uv)
    local ctx, async
    async = _uv.new_async(expect(function (a,b,c)
      p('in async notify callback')
      p(a,b,c)
      assert(a=='a')
      assert(b==true)
      assert(c==250)
    end))

    ctx = _uv.new_work(
      function(n, s, a)         --work,in threadpool
          local uv = require('luv')
          local t = tostring(uv.thread_self())
          if a then
            assert(uv.async_send(a,'a',true,250)==0)
          end
          uv.sleep(10)
          return n, n*n, t, s
      end,
      function(n,r,id, s)       --after work, in loop thread
          p(n, r, id, s)
          assert(n*n==r)
          if async then
            _uv.close(async)
          end
          print(id, 'finish', s)
      end
    )
    _uv.queue_work(ctx,2,'hello',async)
  end)

  test("test threadpool with coro", function(_,p,expect,_uv)
    print(1)
    local co = coroutine.create(function()
      print(3)
      local c = coroutine.running()
      local work = _uv.new_work(function()
        print(6)
        return 1
      end, expect(function(val)
        assert(val==1)
        print(7)
        coroutine.resume(c)
      end))
      print(4)
      work:queue()
      print(5)
      coroutine.yield()
      print(8)
    end)
    print(2)
    coroutine.resume(co)
  end)

  test("test threadpool with invalid argument", function(print,p,expect,_uv)
    local work_fn = function() end
    local after_work_fn = function() end
    local work_ctx = _uv.new_work(work_fn, after_work_fn)

   local ok,msg = pcall(work_ctx.queue, work_ctx, {})
   assert(ok==false)
   assert(msg=="Error: thread arg not support type 'table' at 1")
  end)

  test("test threadpool with invalid return value", function(print,p,expect,_uv)
    local work_fn = function() return {} end
    local after_work_fn = function() end
    local work_ctx = _uv.new_work(work_fn, after_work_fn)

    assert(work_ctx:queue())
    assert(not _uv.run())
  end)
end)