class_docstr: OSS Filesystem Tests
code: def test_read_lines(self):
      file_path = file_io.join(self._base_dir, "temp_file")
      data = [
          "testing1\n",
          "testing2\n",
          "testing3\n",
          "\n",
          "testing5",
      ]
      f = gfile.Open(file_path, mode="r+")
      f.write("".join(data))
      f.flush()
      f.close()
      lines = f.readlines()
      self.assertSequenceEqual(lines, data)
  
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 39 for calling the OSSFSTest obj's underlying member method code with example usage: obj.test_read_lines() without return types