webrat_extension.rb

module Webrat
  module Matchers
    class HaveXpath #:nodoc:
      def initialize(expected, options = {}, &block)
        @expected = expected
        @options  = options
        @handler  = options.delete(:handler)
        @block    = block
      end

      def nokogiri_matches(stringlike)
        if Nokogiri::XML::NodeSet === stringlike
          @query = query.gsub(%r'^//', './/')
        else
          @query = query
        end

        add_options_conditions_to(@query)

        @document = Webrat::XML.document(stringlike)
        @document.xpath(@query, @handler)
      end
    end
  end
end

module CustomHandler
  class MatchHref
    def match_href(list, expression)
      list.find_all { |node| node['href'] =~ /#{expression}/ }
    end 
  end
end