gistfile1.rb

# comparing xml is always a b-i-a-t-c-h in any testing environment.  here is a
# little snippet for ruby that, i think, it a good first pass at making it
# easier.  comment with your improvements please!
#
#
  require 'rubygems'
  require 'xmlsimple'

  def xml_cmp a, b
    eq_all_but_zero = Object.new.instance_eval do
      def ==(other)
        Integer(other) == 0 ? false : true
      end
      self
    end
    a = XmlSimple.xml_in(a.to_s, 'normalisespace' => eq_all_but_zero) 
    b = XmlSimple.xml_in(b.to_s, 'normalisespace' => eq_all_but_zero) 
    a == b
  end


  def random_attributes
    attributes = ('a'..'z').to_a.inject({}){|h,k| h.update k => k.upcase}
    pairs = attributes.to_a.map{|k,v| "#{ k }=#{ v.inspect }"}.sort_by{ rand }
    string = ''
    pairs.each{|pair| string << pair << (' '*(rand(4)+1))}
    string.strip
  end

  a = <<-__
  <root>


    <foo  >

      <bar key='val' #{ random_attributes }> content</bar>   

            </foo>

    <values>
      <a>a</a>
      <b>b</b>
    </values>

  </root>
  __

  b = <<-__
                      <root>
    <foo>  <bar

      #{ random_attributes }

      key 
  = 'val'    >content \n</bar></foo>

    <values> <a>a</a>
            <b>b</b>
    </values>
    </root>
  __

  p xml_cmp(a, b) #=> true