Plain Old CLR Objects - Entity Framework 6 Recipes - page 284

public void SaveChanegs()
{
_context.SaveChanges();
}

public List<Schedule> GetActiveSchedulesForTrain(int trainId)
{
var schedules = from r in _context.Schedules
where r.ArrivalDate.Date >= DateTime.Today &&
r.TrainId == trainId
select r;
return schedules.ToList();
}
}

9. Right-click the solution, and select Add ➤ New Project. Add a Test Project to the solution.

Name this new project Tests . Add a reference to System.Data.Entity .

10. Create a fake object set and fake DbContext so that you can test your business rules in

isolation without interacting with the database. Use the code in Listing 8-16.

Listing 8-16. The Implementation of the Fake Object Set and Fake Object Context

public class FakeDbSet<T> : IDbSet<T>
where T : class
{
HashSet<T> _data;
IQueryable _query;

public FakeDbSet()
{
_data = new HashSet<T>();
_query = _data.AsQueryable();
}

public virtual T Find(params object[] keyValues)
{
throw new NotImplementedException("Derive from FakeDbSet<T> and override Find");
}

public void Add(T item)
{
_data.Add(item);
}

public void Remove(T item)
{
_data.Remove(item);
}