add NoteAttribute class and tests with usage

lib/shopify_api.rb

@@ -182,7 +182,11 @@ module ShopifyAPI
   class ShippingLine < ActiveResource::Base
   end  
 
-  class Order < ActiveResource::Base  
+  class NoteAttribute < ActiveResource::Base
+  end
+
+  class Order < ActiveResource::Base
+    
 
     def close; load_attributes_from_response(post(:close)); end
 

test/order_test.rb

@@ -0,0 +1,48 @@
+require 'test_helper'
+
+class OrderTest < Test::Unit::TestCase
+  def setup
+    ActiveResource::Base.site = "http://localhost"
+  end
+
+  context "Order" do
+    context "#note_attributes" do
+
+      should "be loaded correctly from order xml" do
+        order_xml = <<-XML
+          <?xml version="1.0" encoding="UTF-8"?>
+          <order>
+            <note-attributes type="array">
+              <note-attribute>
+                <name>size</name>
+                <value>large</value>
+              </note-attribute>
+            </note-attributes>
+          </order>
+        XML
+
+        order = ShopifyAPI::Order.new(Hash.from_xml(order_xml)["order"])
+
+        assert_equal 1, order.note_attributes.size
+
+        note_attribute = order.note_attributes.first
+        assert_equal "size", note_attribute.name
+        assert_equal "large", note_attribute.value
+      end
+      
+      should "be able to add note attributes to an order" do
+        order = ShopifyAPI::Order.new
+        order.note_attributes = []
+        order.note_attributes << ShopifyAPI::NoteAttribute.new(:name => "color", :value => "blue")
+        
+        order_xml = Hash.from_xml(order.to_xml)
+        assert note_attributes = order_xml["order"]["note_attributes"]
+        assert_instance_of Array, note_attributes
+        
+        attribute = note_attributes.first
+        assert_equal "color", attribute["name"]
+        assert_equal "blue", attribute["value"]
+      end
+    end
+  end
+end