Add Span<T> to test app

MetadataProcessor.Tests/TestNFApp/Program.cs

@@ -88,6 +88,10 @@ public static void Main()
             Console.WriteLine("Null attributes tests");
             _ = new ClassWithNullAttribs();
 
+            // testing Span<>
+            Console.WriteLine("Span<> tests");
+            _ = new TestingSpan();
+
             Console.WriteLine("Exiting TestNFApp");
         }
 

MetadataProcessor.Tests/TestNFApp/TestNFApp.nfproj

@@ -36,6 +36,7 @@
     <Compile Include="OneClassOverAll.cs" />
     <Compile Include="Program.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="TestingSpan.cs" />
     <Compile Include="TestingDestructors.cs" />
     <Compile Include="TestingDelegates.cs" />
   </ItemGroup>

MetadataProcessor.Tests/TestNFApp/TestingSpan.cs

@@ -0,0 +1,61 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System;
+using System.Diagnostics;
+using TestNFClassLibrary;
+
+namespace TestNFApp
+{
+    public class TestingSpan
+    {
+        public TestingSpan()
+        {
+            int length = 3;
+
+            // base type
+            Console.WriteLine("+++ Span<int> tests");
+            Console.WriteLine();
+
+            Span<int> numbers = new Span<int>(new int[length]);
+            for (int i = 0; i < length; i++)
+            {
+                numbers[i] = i;
+            }
+
+            foreach (int number in numbers)
+            {
+                Console.WriteLine($">>{number.ToString()}");
+            }
+
+            // string type
+            Console.WriteLine("+++ Span<string> tests");
+            Console.WriteLine();
+
+            Span<string> strings = new Span<string>(new string[length]);
+            for (int i = 1; i < length; i++)
+            {
+                strings[i] = $">> '{i * 10}'";
+            }
+
+            foreach (string str in strings)
+            {
+                Console.WriteLine($">> '{str}'");
+            }
+
+            // class type
+            Console.WriteLine("+++ Span<ClassOnAnotherAssembly> tests");
+            Span<ClassOnAnotherAssembly> spanOfClass = new Span<ClassOnAnotherAssembly>(new ClassOnAnotherAssembly[length]);
+
+            for (int i = 0; i < length; i++)
+            {
+                spanOfClass[i] = new ClassOnAnotherAssembly(i * 100);
+            }
+
+            foreach (ClassOnAnotherAssembly item in spanOfClass)
+            {
+                Console.WriteLine($">> '{item.DummyProperty}'");
+            }
+        }
+    }
+}