code: def test_eof_handling_after_process_killed(
      self, lastline: str
  ) -> None:
      cmd = mkcmd(
          r"""
              import sys
              import time
              print(%s, end="", flush=True)
              # message test to kill us, then wait
              print(".", file=sys.stderr, flush=True)
              time.sleep(10)
              """
          % lastline
      )
      start = time.time()
      p = subprocess.Popen(
          cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, bufsize=0
      )
      assert p.stdout and p.stderr
      reader = ship_logs.read_newlines_or_carriage_returns(p.stdout)
      # wait for message on stderr
      _ = p.stderr.read(1)
      p.kill()
      p.wait()
      line = next(reader)
      end = time.time()
      assert line == "hi\n", line
      # Make sure the test didn't wait for that sleep(10) to finish.
      assert end - start < 1, end - start
  
imports: import io
  import json
  import logging
  import os
  import shutil
  import signal
  import socket
  import ssl
  import subprocess
  import sys
  import tempfile
  import textwrap
  import threading
  import time
  from typing import Any, List, Optional
  import pytest
label_desc: Use image node_id 1 for calling the TestReadNewlinesOrCarriageReturns obj's underlying member method code with example usage: obj.test_eof_handling_after_process_killed(lastline) without return types