code: def testWriteBinary(self):
      temp_dir = self._CreateDeepS3Structure()
      ckpt_path = os.path.join(temp_dir, "model.ckpt")
      ckpt_content = b"asdfasdfasdffoobarbuzz"
      with gfile.GFile(ckpt_path, "wb") as f:
          f.write(ckpt_content)
      with gfile.GFile(ckpt_path, "rb") as f:
          ckpt_read = f.read()
          self.assertEqual(ckpt_content, ckpt_read)
  
imports: import boto3
  import os
  import unittest
  from moto import mock_s3
  from tensorboard.compat.tensorflow_stub import errors
  from tensorboard.compat.tensorflow_stub.io import gfile
label_desc: Use image node_id 16 for calling the GFileTest obj's underlying member method code with example usage: obj.testWriteBinary() without return types