TypeMock and Stunt Doubles?

Hello everyone,

Wanted to get your thoughts on this:

I have an asp.net web forms assembly with a number of classes, most of which access data access objects that thus require a database. What I'd like to be able to do is something like what NCover does, but take a step further to combine it with mock objects from a mocking framework.

Code story:

Given a class named WebApp.BrowseView, a method named Page_Load, and a local variable named objService, I want to place a "stand in" object for objService at runtime by shipping a mock object compiled using a mocking framework to the remote server.

Original WebApp.BrowseView.Page_Load assembly code:

// this hits a DB, taking time and not returning enough real data to test the UI fully
ItemService objService= new ItemService();
List<Item> items = objService.GetItems();
foreach (Item item in items)
{
...
}

NUnit test running on the test machine:

My fictional library that does all this is called "StuntMan"

[Test]
public void Grid_Shows_All_Possible_Options()
{

StuntMan.RemoteServer = "http://localhost/MyWebApp";
StuntMan.Connected = true; // attempts to connect, throws an exception if it fails.

...Imagine Selenium code or something else here to navigate to the web page...

Mock<ItemService> mockService = new Mock<ItemService>();
mockService .Expect(m => m.GetItems()).Callback() =>
return ... ));

StuntMan.PushStandIn("WebApp.BrowseView.Page_Load.objService", mockService);

Run Selenium assertions here...

StuntMan.PopStandIn();

}

This would then throw the StandIn off the stage and replace the original assembly. This is important because subsequent tests will need to direct their own stuntmen to replace the same service.

This would allow the stand in object to return whatever data I want in order to test the UI properly. I know that this is not a great practice to fake out running code, but it could solve a very real issue that people have for testing against unstable or hard to replicate data sources.

Of course, ASP.NET MVC is a great solution for this, but that is nice for new projects, but this is something many people need to do in legacy projects.

Is this something that TypeMock can help me with? Or, is there an Add-On or extension I would need to get or make?

Thank you,
Josh