Fake JSON API in C#

Fake_Json.test.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
using System.Web.Http;
using Microsoft.Owin.Hosting;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using NUnit.Framework;
using Owin;

namespace JsonTestServer.Tests
{
    [TestFixture]
    public class Fake_Json
    {
        [Test]
        public void From_Root()
        {
            var client = new HttpClient();
            var response = client.GetAsync("http://localhost:9000/api/").Result.Content.ReadAsAsync<JObject>().Result;
            var json = JsonConvert.SerializeObject(response);
            Console.WriteLine(json);
            Assert.That(json, Is.EqualTo(@"{""items"":{""a"":{""title"":""The A"",""story"":""The A took a stroll""},""b"":{""title"":""The B"",""story"":""The B took a roll""}},""authors"":{""bob"":{""fullName"":""Bob Bobson""},""mike"":{""fullName"":""Mike Mikeson""}}}"));
        }

        [Test]
        public void From_Items()
        {
            var client = new HttpClient();
            var response = client.GetAsync("http://localhost:9000/api/items").Result.Content.ReadAsAsync<JObject>().Result;
            var json = JsonConvert.SerializeObject(response);
            Console.WriteLine(json);
            Assert.That(json, Is.EqualTo(@"{""a"":{""title"":""The A"",""story"":""The A took a stroll""},""b"":{""title"":""The B"",""story"":""The B took a roll""}}"));
        }

        [Test]
        public void From_Item()
        {
            var client = new HttpClient();
            var response = client.GetAsync("http://localhost:9000/api/items/a").Result.Content.ReadAsAsync<JObject>().Result;
            var json = JsonConvert.SerializeObject(response);
            Console.WriteLine(json);
            Assert.That(json, Is.EqualTo(@"{""title"":""The A"",""story"":""The A took a stroll""}"));
        }

        [Test]
        public void From_Authors()
        {
            var client = new HttpClient();
            var response = client.GetAsync("http://localhost:9000/api/authors").Result.Content.ReadAsAsync<JObject>().Result;
            var json = JsonConvert.SerializeObject(response);
            Console.WriteLine(json);
            Assert.That(json, Is.EqualTo(@"{""bob"":{""fullName"":""Bob Bobson""},""mike"":{""fullName"":""Mike Mikeson""}}"));
        }

        private ApiTestHost host;

        [SetUp]
        public void Setup()
        {
            host = new ApiTestHost();
            host.Start();
        }

        [TearDown]
        public void TearDown()
        {
            host.Stop();
        }
    }

    public class CatchAllController : ApiController
    {
        private static string json = @"{
            ""items"": {
                ""a"": {""title"":""The A"", ""story"": ""The A took a stroll""},
                ""b"": {""title"":""The B"", ""story"": ""The B took a roll""}
            }, 
            ""authors"": {
                ""bob"": {""fullName"": ""Bob Bobson""},
                ""mike"": {""fullName"": ""Mike Mikeson""}
            }
        }";

        private readonly JObject data = JObject.Parse(json);

        [HttpGet]
        public object Catch(string catchAll)
        {
            if (catchAll == null) return data;
            var path = catchAll.Split(new []{'/'}, StringSplitOptions.RemoveEmptyEntries);
            if (path.Length == 0) return data;

            JToken current = data;
            for (var index = 0; index < path.Length; index++)
            {
                current = current[path[index]];
            }
            
            return current;
        }
    }

    public class ApiTestHost
    {
        private IDisposable host;
        private string baseAddress;

        public string BaseAddress => baseAddress;

        public void Start()
        {
            baseAddress = "http://localhost:9000/";
            host = WebApp.Start<Startup>(url: baseAddress);
        }

        public void Stop()
        {
            host.Dispose();
        }
    }

    public class Startup
    {
        public void Configuration(IAppBuilder appBuilder)
        {
            var config = new HttpConfiguration();
            config.Routes.MapHttpRoute(
                "fakeApi",
                "api/{*catchAll}",
                new { controller = "CatchAll", Action = "Catch" }
            );

            appBuilder.UseWebApi(config);
        }
    }
}

packages.config

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="Microsoft.AspNet.WebApi" version="5.2.6" targetFramework="net471" />
  <package id="Microsoft.AspNet.WebApi.Client" version="5.2.6" targetFramework="net471" />
  <package id="Microsoft.AspNet.WebApi.Core" version="5.2.6" targetFramework="net471" />
  <package id="Microsoft.AspNet.WebApi.Owin" version="5.2.6" targetFramework="net471" />
  <package id="Microsoft.AspNet.WebApi.OwinSelfHost" version="5.2.6" targetFramework="net471" />
  <package id="Microsoft.AspNet.WebApi.WebHost" version="5.2.6" targetFramework="net471" />
  <package id="Microsoft.Owin" version="2.0.2" targetFramework="net471" />
  <package id="Microsoft.Owin.Host.HttpListener" version="2.0.2" targetFramework="net471" />
  <package id="Microsoft.Owin.Hosting" version="2.0.2" targetFramework="net471" />
  <package id="Newtonsoft.Json" version="11.0.2" targetFramework="net471" />
  <package id="NUnit" version="3.10.1" targetFramework="net471" />
  <package id="Owin" version="1.0" targetFramework="net471" />
</packages>