code: def test_subprocess_with_pipe(self):
      reader, writer = Pipe()
      p = fiber.Process(target=write_pipe, args=(writer, b"fiber pipe"))
      p.start()
      msg = reader.recv()
      p.join()
      assert msg == b"fiber pipe"
  
imports: import fiber
  import pickle
  import time
  import pytest
  import docker
  import collections
  import multiprocessing
  from fiber.queues import Pipe, SimpleQueue
  from fiber.socket import Socket
label_desc: Use image node_id 4 for calling the TestQueue obj's underlying member method code with example usage: obj.test_subprocess_with_pipe() without return types