code: def test_read(self):
      expected = "\n".join(
          [str(unichr(i + ord("a"))) for i in range(26)]
      )
      expected = expected + "\n"
      self._test_read_helper(self.url, 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 3 for calling the HttpConnectorTests obj's underlying member method code with example usage: obj.test_read() without return types