How to test an MVC route with optional querystring parameters

Question

I have this controller method:

[GET("/whatever/list")]
public ActionResult Index(string sortby, string order)

I'm trying to test it with MvcContrib route testing:

"~/whatever/list".ShouldMapTo<MyController>(c => c.Index(string.Empty, string.Empty));
"~/whatever/list?sortby=type&order=desc".ShouldMapTo<MyController>(c => c.Index("type", "desc"));

However, it returns this error.

Failure: MvcContrib.TestHelper.AssertionException : Value for parameter 'sortby' did not match: expected '' but was ''; no value found in the route context action parameter named 'sortby' - does your matching route contain a token called 'sortby'?

What am I missing?

Answer 1

Based on the assert message (expected '' but was ''; so one of the values is null or string.Empty in the assertation) your first test is failing, because you used string.Empty but the default value for string is null

Change your assert to use null and it should wotk:

"~/whatever/list".ShouldMapTo<MyController>(c => c.Index(null, null));

Answer 2

I used like

var route = "~/whatever/list".WithMethod(HttpVerbs.Get);
route.Values.Add("sortby", "type");
route.Values.Add("order", "desc");
route.ShouldMapTo<MyController>(c => c.Index("type", "desc"));