Question

I’m trying to get my head around using Nunit, Ninject, MVC2 and the ADO.Net Entity Data Model.

Let’s say I have have a ProductsController instantiating a SqlProductsRepository class.

public class ProductsRepository : IProductsRepository
{
    public MyDbEntities _context;

    public ProductsRepository()
    {
        _context = new MyDbEntities();
    }

    public IList<Product> GetAllProducts()
    {
        return (from p in _context.Products select p).ToList();
    }
}

public class ProductsController : Controller
{
    public ActionResult ProductsList()
    {
        ProductsRepository r = new ProductsRepository();
        var products = r.GetAllProducts();

        return View(products);
    }
}

I’d like to be able to perform unit testing on ProductsRepository to ensure this is returning the correct data but i’m not sure how to write the Test Class.

Every tutorial/document I’ve read so far points me to creating a Mock object using IProductsRepository and then injecting and testing the Controller.

This seems, to me, to bypass the concrete implementation.

MyDbEntities comes from an ADO.Net Entity Data Model .edmx

Answer 1

You’re exactly right- mocking the repository does bypass the concrete implementation. That’s the point.

Unit testing is not the same thing as functional testing. Your mock object can be set up to return whatever you explicitly define, then you test to ensure that constant inputs from your mock lead to expected results.