Unit Test with .NET MVC and Moq for JsonResult object

Patient.cs

using System;
using System.ComponentModel.DataAnnotations;

using System.Collections.Generic;
using System.Web.Mvc;

namespace MoqTest {
	public class Patient {
		public string FirstName;
		public string LastName;
		[Required]
		public string MRN;
	}
}

PatientController.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace MoqTest.Controllers{
	// Interface for dependency injection
	public interface IPatientRepository{
		JsonResult Index ();
	}

	public class PatientController : Controller{
		private readonly IPatientRepository mPatientRepository;

		public PatientController(IPatientRepository patientRepository) {			
			mPatientRepository = patientRepository;
		}

		public JsonResult Index(){
			// This is demo for Moq. 
			// Test say, this data is from database
			var dbData = new Patient[]{
				new Patient{
					FirstName = "Kiichi",
					LastName = "Takeuchi",
					MRN = "1234"
				},
				new Patient{
					FirstName = "John",
					LastName = "Smith",
					MRN = "4254"
				}
			};

			return Json(new { 
				Status = "ok", 
				Patients = dbData
			},JsonRequestBehavior.AllowGet);		
		}
	}
}

PatientControllerTest.cs

using System;
using NUnit.Framework;
using System.Collections.Generic;
using System.Web;
using System.Web.Mvc;
using System.Linq;
using System.Text;
using MoqTest;
using MoqTest.Controllers;
using Moq;

namespace MoqTest.Tests {
	[TestFixture]
	public class PatientControllerTest {	
		private Mock<IPatientRepository> patientRepoMock;
		private PatientController target;

		[TestFixtureSetUp]
		public void Init(){
			patientRepoMock = new Mock<IPatientRepository>();
			target = new PatientController(patientRepoMock.Object);
		}

		[Test]
		public void IndexTest () {			

			var data =new JsonResult{Data = 
				new {Status="ok", 
					Patients= new Patient[] {
						new Patient {
							FirstName = "Kiichi",
							LastName = "Takeuchi",
							MRN = "1234"
						},
						new Patient {
							FirstName = "John",
							LastName = "Smith",
							MRN = "4254"
						}
					}
				}
			};
		
			patientRepoMock.Setup(r => r.Index()).Returns(data);
			var result = target.Index();

			//--------------------------------------------------------------
			// Asserting Method 1 - use support function to evaluate the dynamic type
			Assert.AreSame ("ok", GetVal<string> (result, "Status"));
			Assert.AreEqual(2, GetVal<Patient[]>(result, "Patients").Length);	

			//--------------------------------------------------------------
			// Asserting Method 2 - using dymanic but you have to remove the security
			// Add 
			// [assembly: InternalsVisibleTo("MyProject.Tests")] 
			// in AssemblyInfo.cs
			//dynamic jsonObject = result.Data;
			//Assert.AreSame("ok",(string)jsonObject.Status);
			//Assert.AreEqual(2, jsonObject.Patients.Length);		
		}

		// Support Function to evaluate JsonResult
		private T GetVal<T>(JsonResult jsonResult, string propertyName){
			var property = jsonResult.Data.GetType().GetProperties()
					.Where(p => string.Compare(p.Name, propertyName) == 0)
					.FirstOrDefault();
			if (null == property)
				throw new ArgumentException("propertyName not found", "propertyName");
			return (T)property.GetValue(jsonResult.Data, null);
		}
	}
}