Error message while working with mocking in unit test

Question

I'm trying to do some Unit Test. I have the following controller:

using SportsStore.domain.Abstract;
using SportsStore.domain.Entities;

namespace SportsStore.WebUI.Controllers
{
    public class ProductController : Controller
    {
        private IProductRepository repository;
        public int PageSize = 4;
        //Declar the dependency on IProductRepository
        public ProductController(IProductRepository productRepository)
        {
            this.repository = productRepository;
        }
        // GET: Product

        public ViewResult List(int page = 1)
        {
            return View(repository.Products.OrderBy(p => p.ProductID).Skip((page-1) * PageSize).Take(PageSize));
        }
   
    }
}

I'm going to unit test the page pagination.

Here is my Unit test:

using SportsStore.domain.Abstract;
using SportsStore.domain.Entities;
using SportsStore.WebUI.Controllers;
using System.Collections.Generic;
using System.Web.Mvc;

namespace SportsStore.UnitTests
{
    [TestClass]
    public class UnitTest1
    {
        [TestMethod]
        public void TestMethod1()
        {
        }

        [TestMethod]
        public void Can_Paginate()
        {
            //Arrange
            Mock<IProductRepository> mock = new Mock<IProductRepository>();
            mock.Setup(m => m.Products).Returns(new Product[]
            {
                new Product {ProductID = 1, Name = "P1" },
                new Product {ProductID = 2, Name = "P2" },
                new Product {ProductID = 3, Name = "P3" },
                new Product {ProductID = 4, Name = "P4" },
                new Product {ProductID = 5, Name = "P5" }
            });

            ProductController controller = new ProductController(mock.Object);
            controller.PageSize = 3;

            //Act
            IEnumerable<Product> result = (IEnumerable<Product>)controller.List(2).Model;

            //Assert
            Product[] prodArray = result.ToArray();
            Assert.IsTrue(prodArray.Length == 2);
            Assert.AreEqual(prodArray[0].Name, "P4");
            Assert.AreEqual(prodArray[1].Name, "P5");
        }
    }
}

I get the following error message in my test file:

What does this mean?

Answer 1

Your project dll use newer dll than the dll you referenced in your test project. just remove the dll from your test project and than add the correct one:

Select the test project in Solution explorer -> References -> right click on System.Web.Mvc -> remove (How to: Add or Remove References)

Than add the correct version of System.Web.Mvc which is 5.2.3.0

Edit

The ASP.NET MVC has a nuget package. This is correct way to add the assembly