nice little unit tests for ensuring the authorization filters and order of those filters in your .NET MVC web app

FilterOrderTests.cs

using System;
using System.Linq;
using System.Reflection;
using System.Web.Mvc;
using NUnit.Framework;
using WebApplication.Filters;

namespace WebApplicationTests.Filters
{
    [TestFixture]
    public class FilterOrderTests
    {
        [Test]
        public void VerifyOrderPropertySetCorrectlyOnAllFilterAttributes()
        {
            var types = Assembly.Load(new AssemblyName("WebApplication")).GetTypes().Where(typeof(AuthorizeAttribute).IsAssignableFrom);

            var allFilters = types.Select(type => Activator.CreateInstance(type) as AuthorizeAttribute).ToList();
            Assert.AreEqual(4, allFilters.Count);

            var sortedList = allFilters.OrderBy(filter => filter.Order).ToList();
            VerifyType(typeof(AuthenticateUserData), sortedList[0]);
            VerifyType(typeof(AuthorizeUserDataRole), sortedList[1]);
            VerifyType(typeof(ProfileCheck), sortedList[2]);
            VerifyType(typeof(UserOwnsProject), sortedList[3]);
        }

        private static void VerifyType(Type type, AuthorizeAttribute element)
        {
            Assert.IsTrue(element.GetType() == type, "Expected " + type.Name + " but was " + element.GetType().Name);
        }
    }
}