Made ShouldReturnEmptyResult return EmptyResult.

Partial implementation of #46.

Author: AlexArchive

TestStack.FluentMVCTesting.Tests/ControllerResultTestTests/ShouldReturnEmptyResultTests.cs

@@ -1,4 +1,5 @@
-using NUnit.Framework;
+using System.Web.Mvc;
+using NUnit.Framework;
 
 namespace TestStack.FluentMVCTesting.Tests
 {
@@ -9,5 +10,13 @@ public void Check_for_empty_result()
         {
             _controller.WithCallTo(c => c.EmptyResult()).ShouldReturnEmptyResult();
         }
+
+        [Test]
+        public void Return_the_empty_result()
+        {
+            EmptyResult actual = _controller.WithCallTo(c => c.EmptyResult())
+                .ShouldReturnEmptyResult();
+            Assert.NotNull(actual);
+        }
     }
 }

TestStack.FluentMVCTesting.Tests/TestControllers/ControllerResultTestController.cs

@@ -27,7 +27,7 @@ class ControllerResultTestController : Controller
         #endregion
 
         #region Empty, Null and Random Results
-        public ActionResult EmptyResult()
+        public EmptyResult EmptyResult()
         {
             return new EmptyResult();
         }

TestStack.FluentMvcTesting/ControllerResultTest/ShouldReturnEmptyResult.cs

@@ -4,9 +4,10 @@ namespace TestStack.FluentMVCTesting
 {
     public partial class ControllerResultTest<T>
     {
-        public void ShouldReturnEmptyResult()
+        public EmptyResult ShouldReturnEmptyResult()
         {
             ValidateActionReturnType<EmptyResult>();
+            return (EmptyResult) ActionResult;
         }
     }
 }