# File test/contrib_test.rb, line 216
  def test_xpath_03_TobiasReif
    doc = Document.new XML_STRING_02.dup
    desired_result_string =
"<entry type='Book'>
    <language>english</language>
    <publisher>Addison-Wesley</publisher>
    <title>Programming Ruby. The Pragmatic Programmer's Guide</title>
    <type>Book</type>
    <year>2000</year>
  </entry>"
    desired_result_tree = Document.new desired_result_string
    xpath = "/biblio/entry[not(author)]"
    result = XPath.first(doc, xpath)
    assert_equal desired_result_string, result.to_s
  end