class_docstr: OSS Filesystem Tests
code: def test_eof(self):
      file_path = file_io.join(self._base_dir, "temp_file")
      f = gfile.Open(file_path, mode="r+")
      content = "testing"
      f.write(content)
      f.flush()
      f.close()
      self.assertEqual(content, f.read(len(content) + 1))
  
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 41 for calling the OSSFSTest obj's underlying member method code with example usage: obj.test_eof() without return types