How to unit-test an action, when return type is ActionResult?

Question

I have written unit test for following action.

[HttpPost]
public ActionResult/*ViewResult*/ Create(MyViewModel vm)
{
    if (ModelState.IsValid)
    {
               


        

Answer 1

Please note that

Assert.IsInstanceOfType(result,typeof(RedirectToRouteResult)); 

has been deprecated.

The new syntax is

Assert.That(result, Is.InstanceOf());