code: def testRead(self):
      temp_dir = self.get_temp_dir()
      self._CreateDeepDirectoryStructure(temp_dir)
      ckpt_path = os.path.join(temp_dir, "model.ckpt")
      ckpt_content = "asdfasdfasdffoobarbuzz"
      with open(ckpt_path, "w") as f:
          f.write(ckpt_content)
      with gfile.GFile(ckpt_path, "r") as f:
          f.buff_chunk_size = 4  # Test buffering by reducing chunk size
          ckpt_read = f.read()
          self.assertEqual(ckpt_content, ckpt_read)
  
imports: import io
  import os
  from tensorboard import test
  from tensorboard.compat.tensorflow_stub import errors
  from tensorboard.compat.tensorflow_stub.io import gfile
label_desc: Use image node_id 9 for calling the GFileTest obj's underlying member method code with example usage: obj.testRead() without return types