Question

I’m working on a new project and I’m using the repository pattern, I have my repository that pulls the data from the database and a ‘service’ class which uses the repository and does all the business logic.

something similar to the following;

public class UserRepository : IUserRepository {     public IQueryable<User> GetUsers()     {     // do stuff     } }  public class UserService  {     public IList<User> GetUserById     {         var rep = new UserRepository();         var users = rep.GetUsers();         // do business logic         return users.ToList();     } } 

Would you test both the UserService and the UserRepository or do you think testing just the Service would suffice? I figure since the service is using the repository it should be fun, but it does kill code coverage.

Answer 1

You should test them both, because it’s possible that someday there will be other clients of UserRepository than UserService, and those clients may use UserRepository differently than UserService.