Commit 8e25686

@@ -9,7 +9,7 @@ namespace MyMoney.Domain.Core
     }
 
     [Serializable]
-    internal abstract class Entity<T> : IEntity where T : class, IEntity
+    public abstract class Entity<T> : IEntity where T : class, IEntity
     {
         protected Entity()
         {

@@ -1,8 +0,0 @@
-namespace MyMoney.Infrastructure.transactions
-{
-    public interface IUnitOfWorkRegistration<T>
-    {
-        T current { get; }
-        bool contains_changes();
-    }
-}
\ No newline at end of file

@@ -0,0 +1,39 @@
+using System.Reflection;
+
+namespace MyMoney.Infrastructure.transactions
+{
+    public interface IUnitOfWorkRegistration<T>
+    {
+        T current { get; }
+        bool contains_changes();
+    }
+
+    public class UnitOfWorkRegistration<T> : IUnitOfWorkRegistration<T>
+    {
+        readonly T original;
+
+        public UnitOfWorkRegistration(T original, T current)
+        {
+            this.original = original;
+            this.current = current;
+        }
+
+        public T current { get; set; }
+
+        public bool contains_changes()
+        {
+            var type = original.GetType();
+            var fields = type.GetFields(BindingFlags.NonPublic | BindingFlags.Instance);
+            foreach (var field in fields)
+            {
+                var original_value = field.GetValue(original);
+                var current_value = field.GetValue(current);
+                if (!original_value.Equals(current_value))
+                {
+                    return true;
+                }
+            }
+            return false;
+        }
+    }
+}
\ No newline at end of file

@@ -0,0 +1,35 @@
+using jpboodhoo.bdd.contexts;
+using MyMoney.Domain.Core;
+using MyMoney.Testing.spechelpers.contexts;
+using MyMoney.Testing.spechelpers.core;
+
+namespace MyMoney.Infrastructure.transactions
+{
+    public abstract class behaves_like_unit_of_work_registration : concerns_for<IUnitOfWorkRegistration<Pillow>>
+    {
+        public override IUnitOfWorkRegistration<Pillow> create_sut()
+        {
+            return new UnitOfWorkRegistration<Pillow>(new Pillow("pink"), new Pillow("yellow"));
+        }
+    }
+
+    public class when_comparing_the_current_instance_of_a_component_with_its_original_and_it_has_changes :
+        behaves_like_unit_of_work_registration
+    {
+        it should_indicate_that_there_are_changes = () => result.should_be_true();
+
+        because b = () => { result = sut.contains_changes(); };
+
+        static bool result;
+    }
+
+    public class Pillow : Entity<Pillow>
+    {
+        readonly string color;
+
+        public Pillow(string color)
+        {
+            this.color = color;
+        }
+    }
+}
\ No newline at end of file

@@ -0,0 +1,9 @@
+using MbUnit.Framework;
+
+namespace MyMoney.Testing.spechelpers.core
+{
+    [TestFixture]
+    public class empty_fixture
+    {
+    }
+}
\ No newline at end of file

@@ -236,10 +236,11 @@
     <Compile Include="Infrastructure\Threading\worker_thread.cs">
       <SubType>Component</SubType>
     </Compile>
-    <Compile Include="Infrastructure\transactions\IUnitOfWorkRegistration.cs" />
     <Compile Include="Infrastructure\transactions\IUnitOfWorkRegistrationFactory.cs" />
     <Compile Include="Infrastructure\transactions\NullUnitOfWork.cs" />
     <Compile Include="Infrastructure\transactions\UnitOfWork.cs" />
+    <Compile Include="Infrastructure\transactions\UnitOfWorkRegistration.cs" />
+    <Compile Include="Infrastructure\transactions\UnitOfWorkRegistrationSpecs.cs" />
     <Compile Include="Infrastructure\transactions\unit_of_work.cs" />
     <Compile Include="Infrastructure\transactions\unit_of_work_factory.cs" />
     <Compile Include="Infrastructure\transactions\UnitOfWorkRegistry.cs" />
@@ -457,6 +458,7 @@
     <Compile Include="Tasks\infrastructure\UpdateTasks.cs" />
     <Compile Include="Testing\spechelpers\contexts\concerns_for.cs" />
     <Compile Include="Testing\spechelpers\contexts\behaves_like_a_repository.cs" />
+    <Compile Include="Testing\spechelpers\core\empty_fixture.cs" />
     <Compile Include="Testing\spechelpers\core\IHideObjectMembers.cs" />
     <Compile Include="Testing\spechelpers\core\method_call_occurance.cs" />
     <Compile Include="Testing\MetaData\run_in_real_container.cs" />