Tested exception handling (#7)

SieveUnitTests/Entities/Comment.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Sieve.Attributes;
+
+namespace SieveUnitTests.Entities
+{
+    public class Comment
+    {
+        public int Id { get; set; }
+
+        public string Text { get; set; }
+    }
+}