class_docstr: OSS Filesystem Tests
code: def test_rename_overwrite(self):
      file_path = file_io.join(self._base_dir, "temp_file")
      with gfile.Open(file_path, mode="w") as f:
          f.write("testing")
      rename_path = file_io.join(self._base_dir, "rename_file")
      with gfile.Open(rename_path, mode="w") as f:
          f.write("rename")
      gfile.Rename(file_path, rename_path, overwrite=True)
      self.assertTrue(gfile.Exists(rename_path))
      self.assertFalse(gfile.Exists(file_path))
  
imports: import os
  import unittest
  from tensorflow.python.framework import errors
  from tensorflow.python.lib.io import file_io
  from tensorflow.python.platform import test
  from tensorflow.python.platform import gfile
  import tensorflow
  import tensorflow_io
label_desc: Use image node_id 21 for calling the OSSFSTest obj's underlying member method code with example usage: obj.test_rename_overwrite() without return types