code: def test_readlines(self):
      with self.open(os_helper.TESTFN, self.READMODE) as fp:
          data = fp.readlines()
      self.assertEqual(data, DATA_SPLIT)
      self.assertEqual(repr(fp.newlines), repr(self.NEWLINE))
  
imports: import io
  import _pyio
  import unittest
  import os
  import sys
  from test.support import os_helper
label_desc: Use image node_id 4 for calling the TestGenericUnivNewlines obj's underlying member method code with example usage: obj.test_readlines() without return types