code: def _test_read_helper(self, url, content_expected):
      url = util._make_internal_url(url)
      content_read = glconnect.get_unity().__read__(url)
      self.assertEqual(content_read, content_expected)
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import sys
  import json
  import logging
  import os
  import fnmatch
  import tempfile
  import unittest
  import pandas
  from .._connect import main
  from ..None import _sys_util
  from ..None import util
  from ..None import SGraph, SFrame, load_sgraph, load_model, load_sframe
  from turicreate.toolkits._model import Model
  from pandas.util.testing import assert_frame_equal
label_desc: Use image node_id 2 for calling the HttpConnectorTests obj's underlying member method code with example usage: obj._test_read_helper(url, content_expected) without return types