Question

Need some guidance on how to go about unit testing a shopping cart (.net mvc, c#).

I want to use sqllite as I am using nhibernate so I can create an in-memory version of my database for integration testing.

So I have a Cart object:

public class Cart
{
      void Add(Item item);
      void Delete(Item item);

      void CalculateTotalBLah();
}

so the method Add might look like:

public void Add(Item item)
{
     ItemDAO item = new SomeFactory();

     item.Add(item);
}

So there are 2 things I have to test I guess:

1. that the in-memory representation of the Cart object adds the item to the cart.
2. the database is correctly in synch. with the in-memory object.

The database test I believe is fairly straight forward.

How do I test #1, how do I remove the dependancy of the db operations? Does nunit do this for me somehow?

Answer 1

You can use a repository pattern. Then create a Moq for the repository. The Mock should make sure the save was called. The shopping cart constructor should take an IRepository so you can either send in a Mock or the real thing.