code: public static void assertXpathsNotEqual(String controlXpath,
                                              InputSource controlDocument,
                                              String testXpath,
                                              InputSource testDocument)
          throws SAXException, IOException, XpathException {
          assertXpathsNotEqual(controlXpath,
                               XMLUnit.buildControlDocument(controlDocument),
                               testXpath,
                               XMLUnit.buildTestDocument(testDocument));
      }
docs: Assert that the node lists of two Xpaths in two XML strings are
  NOT equal
  @param controlXpath
  @param controlDocument
  @param testXpath
  @param testDocument
  @throws SAXException
  @throws IOException