gistfile1.rbx

      def test_namespace_as_hash
        xml = Nokogiri::XML.parse(<<-eoxml)
<root>
 <car xmlns:part="http://general-motors.com/">
  <part:tire>Michelin Model XGV</part:tire>
 </car>
 <bicycle xmlns:part="http://schwinn.com/">
  <part:tire>I'm a bicycle tire!</part:tire>
 </bicycle>
</root>
        eoxml

        tires = xml.xpath('//bike:tire', {'bike' => 'http://schwinn.com/'})
        assert_equal 1, tires.length
      end