code: def test_get_protocol(self):
      self.assertEqual(fu.get_protocol(self.local_path), "")
      self.assertEqual(fu.get_protocol(self.s3_path), "s3")
      self.assertEqual(fu.get_protocol(self.http_path), "http")
  
file_path: turicreate/src/python/turicreate/test/test_file_util.py
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import os
  import unittest
  from ..util import _file_util
  import pytest
label_desc: Use image node_id 3 for calling the FileUtilTests obj's underlying member method code with example usage: obj.test_get_protocol() without return types