Deprecated ShouldRenderFile.

Partial implementation of #3.

Author: AlexArchive

TestStack.FluentMvcTesting/ControllerResultTest.cs

@@ -253,6 +253,7 @@ public FileContentResult ShouldRenderFileContents(byte[] contents = null, string
             return fileResult;
         }
 
+        [Obsolete("Obsolete: Use ShouldRenderFileContents instead.")]
         public FileContentResult ShouldRenderFile(string contentType = null)
         {
             ValidateActionReturnType<FileContentResult>();