Ticket #103: rexml_xpath_attribute_query.rb

# rexml_xpath_attribute_query.rb
# May 16, 2007
#

$:.unshift File.join(File.dirname(__FILE__),'..','lib')

require 'test/unit'
require 'rexml/document'

class TestRexml_xpath_attribute_query < Test::Unit::TestCase
  
  # xmlstr1 and xmlstr2 only differ in the second line - namespaces in the root element
  @@xmlstr1 = '<?xml version="1.0" encoding="UTF-8"?>
<feed xmlns="http://www.w3.org/2005/Atom" xmlns:openSearch="http://a9.com/-/spec/opensearchrss/1.0/" xmlns:gd="http://schemas.google.com/g/2005" xmlns:gCal="http://schemas.google.com/gCal/2005">
        <id>http://www.google.com/calendar/feeds/me%40gmail.com</id>
        <entry>
                <id>http://www.google.com/calendar/feeds/me%40gmail.com/me%40gmail.com</id>
                <published>2007-05-16T13:42:27.942Z</published>
                <updated>2007-05-15T03:29:28.000Z</updated>
                <title type="text">My Calendar</title>
                <link rel="alternate" type="application/atom+xml" href="http://www.google.com/calendar/feeds/me%40gmail.com/private/full"/>
                <link rel="http://schemas.google.com/acl/2007#accessControlList" type="application/atom+xml" href="http://www.google.com/calendar/feeds/me%40gmail.com/acl/full"/>
                <link rel="self" type="application/atom+xml" href="http://www.google.com/calendar/feeds/me%40gmail.com/me%40gmail.com"/>
                <author>
                        <name>Me</name>
                        <email>me@gmail.com</email>
                </author>
        </entry>
</feed>'

  
  @@xmlstr2 = '<?xml version="1.0" encoding="UTF-8"?>
<feed>
        <id>http://www.google.com/calendar/feeds/me%40gmail.com</id>
        <entry>
                <id>http://www.google.com/calendar/feeds/me%40gmail.com/me%40gmail.com</id>
                <published>2007-05-16T13:42:27.942Z</published>
                <updated>2007-05-15T03:29:28.000Z</updated>
                <title type="text">My Calendar</title>
                <link rel="alternate" type="application/atom+xml" href="http://www.google.com/calendar/feeds/me%40gmail.com/private/full"/>
                <link rel="http://schemas.google.com/acl/2007#accessControlList" type="application/atom+xml" href="http://www.google.com/calendar/feeds/me%40gmail.com/acl/full"/>
                <link rel="self" type="application/atom+xml" href="http://www.google.com/calendar/feeds/me%40gmail.com/me%40gmail.com"/>
                <author>
                        <name>Me</name>
                        <email>me@gmail.com</email>
                </author>
        </entry>
</feed>'
  
  # Fails
  def test_xpath_query
    do_test @@xmlstr1
  end
  
  # Passes
  def test_xpath_query_no_namespace
    do_test @@xmlstr2
  end
  
  def do_test(xmlString)
    REXML::Document.new(xmlString).elements.each("feed/entry") do |element|
      @alternate_link = element.elements["link[@rel='alternate']"]
    end
    
    assert_not_nil @alternate_link
    puts @alternate_link.attributes['href']
  end

  
  def test_another_way
    doc = REXML::Document.new(@@xmlstr1)
    REXML::XPath.each(doc, "//link[@rel='alternate']") do |element|
      @alternate_link = element
    end
    assert_not_nil @alternate_link
  end
end