Attempts to get unit tests working in ServiceStack

HelloWorldService.cs

using ServiceStack.ServiceHost;
using ServiceStack.ServiceInterface;

namespace MyAPI.ServiceInterface
{
  [Route("/HelloWorld/Greeting/{FirstName}/{LastName}", "GET")]
	[Route("/HelloWorld/Greeting/{FirstName}", "GET")]
	public class HelloWorldName : IReturn<HelloWorldGreeting>
	{
		public string FirstName { get; set; }
		public string LastName { get; set; }
	}
	
	public class HelloWorldGreeting
	{
		public string Greeting { get; set; }
	}
	
	public class HelloWorldService : Service
	{
		public HelloWorldGreeting Get(HelloWorldName request)
		{
			var answer = new HelloWorldGreeting
			{
				Greeting = "Hello " + request.FirstName + " " + request.LastName
			};
			return answer;
		}
	}
}

HelloWorldTest.cs

using System;
using System.Collections.Generic;
using NUnit.Framework;

using ServiceStack.WebHost.Endpoints;
using ServiceStack.ServiceHost;
using ServiceStack.Logging;
using ServiceStack.Logging.Support.Logging;

using MyAPI.ServiceInterface;

/*
 * Most of this is copied from: https://gist.github.com/waynebrantley/4698629
 */

namespace MyAPI.Tests
{
  [TestFixture]
	public class HelloWorldTest : AppHostBase
	{
		private ILog log;
		
		public HelloWorldTest() : base("Unit Tests", typeof(HelloWorldService).Assembly)
		{
			LogManager.LogFactory = new DebugLogFactory();
			log = LogManager.GetLogger(GetType());
			Instance = null;
		}
		
		public override void Configure(Funq.Container container) { }
		
		[TestCase("John", "Smith", "Hello John Smith")]
		public void TestCase(string firstname, string lastname, string answer)
		{
			var request = new HelloWorldName { FirstName = firstname, LastName = lastname };
            
            /*
             * Here is where an exception is thrown, stating "Unable to resolve service 'HelloWorldName',
             * though HelloWorldName is actually a request DTO.
             */
			var response = ExecuteService(request, EndpointAttributes.None);
			Assert.That(response.Greeting, Is.EqualTo(answer));
		}
	}
}