TestUnitOfWork and SaveChanges

I am just trying to setup a TestUnitOfWork and have come across a few issues:

I have a Service that I pass IUnitOfWork into and it has a very simple method:

public void Add(LocalisationItem localisationItem)
{
 UnitOfWork.Add(localisationItem);
 UnitOfWork.SaveChanges(true);
}

The test method that calls this is as follows:

// Arrange
var item1 = EntityFactory.Create<LocalisationItem>(EntityState.Default);
item1.Key = "Test Key";
item1.Value = "Test Value";

var expectedItems = new List<Entity> { item1 };

_unitOfWork.SetExpectedCollectionResult(expectedItems);
_unitOfWork.SetExpectedCountResult(1);

// Act
var newItem = new LocalisationItem {Key = "New Item Key", Value = "New Item Value"};
_localisationService.Add(newItem);   

// Assert
var count = _unitOfWork.Count<LocalisationItem>();
Assert.AreEqual(count, 2);

var value = _localisationService.Localise("New Item Key");
Assert.AreEqual(value, "New Item Value");

1. How do I define in the TestUnitOfWork the identity generation if KeyTable is used.  I don't want to connect the TestUnitOfWork context to a physical db as it sort of misses the point of using the TestUnitOfWork fake really.

2. As I seed the TestUnitOfWork with 1 dummy LocalisationItem entity and add a new one I expect the Count method to return 2 but I only get 1.

This to me suggests the TestUnitOfWork is really only useful for query based tests and not suited to methods that add or update entities.

Thanks,

Jim

Hi Jim,

Thanks for your feedback! We're always happy to get requests for enhancements and to hear how folks want to work with the TestUnitOfWork.

Specifically to your two points:

• It's unlikely we can get the TestUnitOfWork to use the KeyTable identity method. Do you actually need them to get identitity? From the example shown I can't see why they would need to have a valid Id -- but perhaps I'm not following completely? If you absolutely need to have fixed Id, you could add one explicitly from the output of the EntityFactory in the testing namespace.
• I will investiagate having Add actually add the entity to the unit of work, it could add to the internal identity map (not sure why I didn't do this, but I'll post an update if it looks like there was a sane reason!)

Again, thanks for the feedback, I'll update once I have an answer on point 2.

John-Daniel Trask