code: def testReadConfigFileMissingDocumentRoot(
      self, findConfigFile, environ
  ):
      environ.get.return_value = None
      findConfigFile.side_effect = self.files.get
      configuration.Configuration.clear()
  
      with open(self.files["nupic-default.xml"], "w") as fp:
          fp.write(
              "\n".join(
                  (
                      '<?xml version="1.0"?>',
                      '<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>',
                  )
              )
          )
  
      with patch("sys.stderr", new_callable=StringIO):
          self.assertRaises(
              (ExpatError, ParseError),
              configuration.Configuration.get,
              "foo",
          )
  
imports: from copy import copy
  import os
  import shutil
  from StringIO import StringIO
  import sys
  import tempfile
  import unittest2
  import uuid
  from pkg_resources import resource_filename
  from mock import Mock, patch
  from pkg_resources import resource_filename
  from xml.parsers.expat import ExpatError
  import nupic
  import nupic.support.configuration_custom
  import configuration_test
label_desc: Use image node_id 31 for calling the ConfigurationCustomTest obj's underlying member method code with example usage: obj.testReadConfigFileMissingDocumentRoot(findConfigFile, environ) without return types