Linq Fake/Mock context

Question

Let say I got the following code in my SqlUserRepository :

var user = from u in NHibernateLinqContext.Linq<User>() ...

What I would like is to have a similar context for my FakeuserRepository

var user = from u in FakeLinqContext.Linq<User>() ...

Like that, I'll be able to use the same logic in my SqlUserRespository that my FakeUserRepository. But, I don't know how Linq context work and how I can be able to create one for my FakeUserRepository.

Ideally I would like that, by example, my AnythingUserRepository take a context in constructor parameter.

Example :

SqlUserRepository() : base(NHibernateLinqcontext)
FakeUserRepository() : base(FakeLinqcontext)

Any idea how I can achieve that ?

Answer 1

You could allow the NHibernateLinqContext dependency to be injected into your SqlUserRepository by giving it an appropriate constructor, e.g.

public SqlUserRepository(NHibernateLinqContext context)
{
    // ...
}

If you want to unit test your SqlUserRepository then you could supply a mocked NHibernateLinqContext to the construction of your target.

If you want to unit test a class which uses your SqlUserRepository then you could simply mock the SqlUserRepository. I'm not sure why you would need a concrete FakeUserRepository.