MVCContrib TestHelper and User.Identity.Name, Server.MapPath and Form Collection - unit-testing

Question

I am new to MVCContrib Testhelper and mocking with Rhino.
I am needing assistance with unit testing a controller which relies on User.Identity.Name, Server.MapPath and Form Collection.
I started off with
var controller = new SubmitController();
var builder = new TestControllerBuilder();
builder.InitializeController(controller);
I found this post for setting User.Identity.Name
controller.ControllerContext = TestHelper.MockControllerContext(controller).WithAuthenticatedUser("domain\\username");
At this point, in my controller i am now able to get to the User.Identity. The problem then became how to i set Form Collection variables. Setting
builder.Form.Add("testvar","1");
no longer worked. It seemed that now I had to access via
controller.HttpContext.Request.Form.Add("testvar","1)
This seemed to work, but at this point, i was no longer using builder(TestControllerBuilder) above.
I then had to mock Server which raised up more issues. How can I continue to use builder but use mocks or stubs for httpContext, HttpRequest, Server etc. I was sort of expecting that builder would have methods for setting expected values for HttpRequest, Server etc.
Thanks

Answer 1

When you replaced the controller's ControllerContext that removed the MVCContrib context. Try something like this:
using MvcContrib.TestHelper;
using MvcContrib.TestHelper.Fakes;
using Rhino.Mocks;
...
var builder = new TestControllerBuilder();
builder.Form.Add("testvar", "1");
builder.HttpContext.User = new FakePrincipal(new FakeIdentity("UserName"), new string[] { "Role" });
builder.HttpContext.Server.Stub(x => x.MapPath(Arg<string>.Is.Anything)).Return("Value");
builder.InitializeController(controller);