code: def testReadWithOffset(self):
      temp_dir = self.get_temp_dir()
      self._CreateDeepDirectoryStructure(temp_dir)
      ckpt_path = os.path.join(temp_dir, "model.ckpt")
      ckpt_content = "asdfasdfasdffoobarbuzz"
      ckpt_b_content = b"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(12)
          self.assertEqual("asdfasdfasdf", ckpt_read)
          ckpt_read = f.read(6)
          self.assertEqual("foobar", ckpt_read)
          ckpt_read = f.read(1)
          self.assertEqual("b", ckpt_read)
          ckpt_read = f.read()
          self.assertEqual("uzz", ckpt_read)
          ckpt_read = f.read(1000)
          self.assertEqual("", ckpt_read)
      with gfile.GFile(ckpt_path, "rb") as f:
          ckpt_read = f.read()
          self.assertEqual(ckpt_b_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 11 for calling the GFileTest obj's underlying member method code with example usage: obj.testReadWithOffset() without return types