is ther a way to fake the Uri class - nunit

Question

I ma writing unit testcases using NUnit and Fake it Easy for MVC4 Controllers.
In one of the controller, I should be getting exception.
ExceptionDetail exception = new ExceptionDetail() { Description = "Test", ErrorCode = ExceptionErrorCode.UserIsDisabled };
Exception ex = new Exception(new Uri("http://localhost//Plat/ManagementSvc/Groups?UserID=" + iD "), exception );
A.CallTo(() => Fake.GetDataAsync<IEnumerable<Group>>(fakeHttpSession, url)).Throws(ex);
My question is instead of passing localhost(new Uri("http://localhost//Plat/ManagementSvc/Groups"), is there a way to fake the url for URI

Answer 1

If the problem is that the exception isn't being thrown when your production code calls GetDataAsync, it could just be that your code is passing in a different Uri. If this is so, you can change which Uri triggers that call by using a different form of argument constraint.
Instead of matching the Uri exactly, you could choose to match any Uri:
A.CallTo(() => Fake.GetDataAsync<IEnumerable<Group>>(fakeHttpSession, A<Uri>.Ignored))
.Throws(ex);
Or you could even be more specific:
A.CallTo(() => Fake.GetDataAsync<IEnumerable<Group>>(fakeHttpSession, A<Uri>.That.Matches(uri => uri.AbsolutePath == "/Plat/ManagementSvc/Groups"))
.Throws(ex);
if that's what's needed. There are many options. Check out the documentation.
Note that there's no faking of a Uri here. You're just telling FakeItEasy what tests to apply to a received Uri in order to decide whether the faked GetDataAsync method should throw