From ae5b27fd2f3b6c538d2632830bb03165f4d60b60 Mon Sep 17 00:00:00 2001
From: "jason.zhu" <jason.zhu@xero.com>
Date: Mon, 22 Feb 2021 10:11:30 +0000
Subject: [PATCH] Finished Defining a Delegate

---
 gradebook/test/GradeBook.Tests/TypeTests.cs | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/gradebook/test/GradeBook.Tests/TypeTests.cs b/gradebook/test/GradeBook.Tests/TypeTests.cs
index 7b63549..db76876 100644
--- a/gradebook/test/GradeBook.Tests/TypeTests.cs
+++ b/gradebook/test/GradeBook.Tests/TypeTests.cs
@@ -4,8 +4,26 @@ using Xunit;
 namespace GradeBook.Tests
 {
     using GradeBook;
+ 
+    public delegate string WriteLogDelegate(string logMessage);
+
     public class TypeTests
     {
+        [Fact]
+        public void WriteLogDelegateCanPointToMethod()
+        {
+            string msg = "test";
+
+            WriteLogDelegate log = new WriteLogDelegate(ReturnMessage); // Instantiate a delegate
+            var result = log(msg); // Invoking a delegate
+            Assert.Equal(result, msg);
+        }
+
+        string ReturnMessage(string message)
+        {
+            return message;
+        }
+
         [Fact]
         public void ValueTypesAlsoPassByValue()
         {