Ignore the order of attributes (closes #5).

lib/nokogiri/diff/xml/node.rb

@@ -48,7 +48,7 @@ def tdiff_equal(node)
   #
   def tdiff_each_child(node,&block)
     if node.kind_of?(Nokogiri::XML::Element)
-      node.attribute_nodes.each(&block)
+      node.attribute_nodes.sort_by(&:name).each(&block)
     end
 
     node.children.each(&block)

spec/diff_spec.rb

@@ -3,20 +3,22 @@
 
 describe "nokogiri/diff" do
   let(:contents) { '<div><p>one</p></div>' }
-  let(:doc) { Nokogiri::XML(contents) }
+  let(:doc)      { Nokogiri::XML(contents) }
 
-  let(:added_text) { Nokogiri::XML('<div><p>one</p>two</div>') }
+  let(:added_text)    { Nokogiri::XML('<div><p>one</p>two</div>') }
   let(:added_element) { Nokogiri::XML('<div><p>one</p><p>two</p></div>') }
-  let(:added_attr) { Nokogiri::XML('<div><p id="1">one</p></div>') }
+  let(:added_attr)    { Nokogiri::XML('<div><p id="1">one</p></div>') }
+  let(:added_attrs)   { Nokogiri::XML('<div><p id="1" class="2">one</p></div>') }
 
-  let(:changed_text) { Nokogiri::XML('<div><p>two</p></div>') }
-  let(:changed_element) { Nokogiri::XML('<div><span>one</span></div>') }
-  let(:changed_attr_name) { Nokogiri::XML('<div><p i="1">one</p></div>') }
+  let(:changed_text)       { Nokogiri::XML('<div><p>two</p></div>') }
+  let(:changed_element)    { Nokogiri::XML('<div><span>one</span></div>') }
+  let(:changed_attr_name)  { Nokogiri::XML('<div><p i="1">one</p></div>') }
   let(:changed_attr_value) { Nokogiri::XML('<div><p id="2">one</p></div>') }
+  let(:changed_attr_order) { Nokogiri::XML('<div><p class="2" id="1">one</p></div>') }
 
-  let(:removed_text) { Nokogiri::XML('<div><p></p>two</div>') }
+  let(:removed_text)    { Nokogiri::XML('<div><p></p>two</div>') }
   let(:removed_element) { Nokogiri::XML('<div></div>') }
-  let(:removed_attr) { Nokogiri::XML('<div><p>one</p></div>') }
+  let(:removed_attr)    { Nokogiri::XML('<div><p>one</p></div>') }
 
   it "should add #diff to Nokogiri::XML::Docuemnt" do
     doc.should respond_to(:diff)
@@ -92,6 +94,12 @@
     changes[4][1].should == added_element.at('//p[2]/text()')
   end
 
+  it "should ignore when attribute order changes" do
+    changes = added_attrs.at('p').diff(changed_attr_order.at('p')).to_a
+
+    changes.all? { |change| change[0] == ' ' }.should be_true
+  end
+
   it "should determine when attributes are added" do
     changes = doc.at('p').diff(added_attr.at('p')).to_a
 
@@ -206,6 +214,9 @@
     changes[2][1].should == added_element.at('//p[2]')
   end
 
+  it "should ignore when attributes change order" do
+  end
+
   it "should determine when attributes are removed" do
     changes = added_attr.at('div').diff(removed_attr.at('div')).to_a