Example of how to use Moq in ASP.NET MVC Unit Tests with NUnit

Moq-demo.cs

namespace MoqDemo.Tests
{
  using System;
  using System.Web;
  using System.Web.Mvc;
  using System.Web.Routing;
  using Moq;
  using NUnit.Framework;
  using HomeController = Controllers.HomeController;

  [TestFixture]
  public class HomeControllerTestClass
  {
    Mock<HttpRequestBase> request;
    Mock<HttpResponseBase> response;
    Mock<HttpContextBase> context;

    RequestContext rc;

    [SetUp]
    public void Init()
    {
      request = new Mock<HttpRequestBase>(MockBehavior.Strict);
      var cookies = new HttpCookieCollection();
      request.SetupGet(req => req.Cookies).Returns(cookies);
      var uri = new Uri("https://www.example.com/pixel?dr=https%3A%2F%2Fwww.example.com");
      request.SetupGet(req => req.Url).Returns(uri);
      var referrer = new Uri("https://www.example.com/referrer");
      request.SetupGet(req => req.UrlReferrer).Returns(referrer);
      request.SetupGet(req => req.UserAgent).Returns("my browser");


      response = new Mock<HttpResponseBase>(MockBehavior.Strict);
      response.SetupGet(resp => resp.Cookies).Returns(cookies);
      response.Setup(resp =>
        resp.SetCookie(It.IsAny<HttpCookie>()))
          .Callback<HttpCookie>((cookie) => cookies.Add(cookie));

      context = new Mock<HttpContextBase>(MockBehavior.Strict);
      context.SetupGet(ctx => ctx.Request).Returns(request.Object);
      context.SetupGet(ctx => ctx.Response).Returns(response.Object);

      rc = new RequestContext(context.Object, new RouteData());
    }

    [Test]
    public void HomeShouldReturnAFile()
    {
      var controller = new HomeController();
      controller.ControllerContext = new ControllerContext(rc, controller);
      
      var actual = controller.Index();
      Assert.IsInstanceOf<FileContentResult>(actual, "Expected a FileResult");
    }
  }
}