code: def test_async_writer_without_write(self):
      logdir = self.get_temp_dir()
      w = EventFileWriter(logdir)
      w.close()
      event_files = sorted(glob.glob(os.path.join(logdir, "*")))
      r = PyRecordReader_New(event_files[0])
      r.GetNext()
      s = event_pb2.Event.FromString(r.record())
      self.assertEqual(s.file_version, "brain.Event:2")
      self.assertEqual(
          s.source_metadata.writer,
          "tensorboard.summary.writer.event_file_writer",
      )
  
imports: import glob
  import os
  import threading
  import time
  from typing import Optional
  from unittest.mock import MagicMock
  from tensorboard.summary.writer.event_file_writer import EventFileWriter
  from tensorboard.summary.writer.event_file_writer import _AsyncWriter
  from tensorboard.compat.proto import event_pb2
  from tensorboard.compat.proto.summary_pb2 import Summary
  from tensorboard.compat.tensorflow_stub.pywrap_tensorflow import PyRecordReader_New
  from tensorboard import test
label_desc: Use image node_id 3 for calling the EventFileWriterTest obj's underlying member method code with example usage: obj.test_async_writer_without_write() without return types