Add unit test for PropertyGridCommands.cs file (#13495)

* Add unit test for PropertyGridCommands.cs file

Author: Philip-Wang01

src/test/unit/System.Windows.Forms/System/Windows/Forms/PropertyGridCommandsTests.cs

@@ -0,0 +1,45 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Windows.Forms.PropertyGridInternal;
+
+namespace System.Windows.Forms.Tests;
+
+public class PropertyGridCommandsTests
+{
+    [Fact]
+    public void PropertyGridCommand_CommandID_HasExpectedValues()
+    {
+        Guid expectedGuid = new("5a51cf82-7619-4a5d-b054-47f438425aa7");
+
+        PropertyGridCommands.Reset.Guid.Should().Be(expectedGuid);
+        PropertyGridCommands.Reset.ID.Should().Be(0x3000);
+
+        PropertyGridCommands.Description.Guid.Should().Be(expectedGuid);
+        PropertyGridCommands.Description.ID.Should().Be(0x3001);
+
+        PropertyGridCommands.Hide.Guid.Should().Be(expectedGuid);
+        PropertyGridCommands.Hide.ID.Should().Be(0x3002);
+
+        PropertyGridCommands.Commands.Guid.Should().Be(expectedGuid);
+        PropertyGridCommands.Commands.ID.Should().Be(0x3010);
+    }
+
+    [Fact]
+    public void WfcMenuGroup_HasExpectedGuid()
+    {
+        PropertyGridCommands propertyGridCommands = new();
+        Guid tests = propertyGridCommands.TestAccessor().Dynamic.wfcMenuGroup;
+
+        tests.Should().Be(new Guid("a72bd644-1979-4cbc-a620-ea4112198a66"));
+    }
+
+    [Fact]
+    public void WfcMenuCommand_HasExpectedGuid()
+    {
+        PropertyGridCommands propertyGridCommands = new();
+        Guid tests = propertyGridCommands.TestAccessor().Dynamic.wfcMenuCommand;
+
+        tests.Should().Be(new Guid("5a51cf82-7619-4a5d-b054-47f438425aa7"));
+    }
+}