code: def test_close(self):
      a, b = socket.socketpair()
      trans = self.loop._make_socket_transport(a, asyncio.Protocol())
      f = asyncio.ensure_future(
          self.loop.sock_recv(b, 100), loop=self.loop
      )
      trans.close()
      self.loop.run_until_complete(f)
      self.assertEqual(f.result(), b"")
      b.close()
  
imports: import os
  import signal
  import socket
  import sys
  import time
  import threading
  import unittest
  from unittest import mock
  import _overlapped
  import _winapi
  import asyncio
  from asyncio import windows_events
  from test.test_asyncio import utils
label_desc: Use image node_id 2 for calling the ProactorTests obj's underlying member method code with example usage: obj.test_close() without return types