[Windows] Implemented the AutomationPeers to the Border control

src/Controls/tests/TestCases.HostApp/Issues/Issue27627.cs

@@ -0,0 +1,30 @@
+namespace Maui.Controls.Sample.Issues;
+
+[Issue(IssueTracker.Github, 27627, "[Windows] Border Automation Peer", PlatformAffected.UWP)]
+public partial class Issue27627 : ContentPage
+{
+	public Issue27627()
+	{
+		var grid = new Grid();
+
+		var border = new Border
+		{
+			AutomationId = "TestBorder",
+			VerticalOptions = LayoutOptions.Center,
+			HeightRequest = 100,
+			Stroke = Colors.Red
+		};
+
+		var label = new Label
+		{
+			Text = "Test Label",
+			HorizontalOptions = LayoutOptions.Center,
+			VerticalOptions = LayoutOptions.Center
+		};
+
+		border.Content = label;
+
+		grid.Children.Add(border);
+		Content = grid;
+	}
+}

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue27627.cs

@@ -0,0 +1,22 @@
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues
+{
+	public class Issue27627 : _IssuesUITest
+	{
+		public override string Issue => "[Windows] Border Automation Peer";
+
+		public Issue27627(TestDevice device)
+		: base(device)
+		{ }
+
+		[Test]
+		[Category(UITestCategories.Border)]
+		public void VerifyBorderAutomationPeer()
+		{
+			App.WaitForElement("TestBorder");
+		}
+	}
+}

src/Core/src/Platform/Windows/ContentPanel.cs

@@ -11,6 +11,7 @@
 using Microsoft.UI.Xaml;
 using Microsoft.UI.Xaml.Hosting;
 using Microsoft.UI.Xaml.Shapes;
+using Microsoft.UI.Xaml.Automation.Peers;
 
 namespace Microsoft.Maui.Platform
 {
@@ -65,6 +66,16 @@ internal FrameworkElement? Content
 			return size;
 		}
 
+		protected override AutomationPeer OnCreateAutomationPeer()
+		{
+			if (CrossPlatformLayout is IBorderView)
+			{
+				return new MauiBorderAutomationPeer(this);
+			}
+
+			return base.OnCreateAutomationPeer();
+		}
+
 		public ContentPanel()
 		{
 			_borderPath = new Path();

src/Core/src/Platform/Windows/MauiBorderAutomationPeer.cs

@@ -0,0 +1,25 @@
+using Microsoft.UI.Xaml.Automation.Peers;
+using Microsoft.UI.Xaml.Controls;
+
+namespace Microsoft.Maui.Platform
+{
+	// TODO: Make this class public in .NET 10.0. Issue Link: https://github.com/dotnet/maui/issues/30205
+	internal class MauiBorderAutomationPeer : FrameworkElementAutomationPeer
+	{
+		internal MauiBorderAutomationPeer(Panel owner) : base(owner) { }
+
+		protected override AutomationControlType GetAutomationControlTypeCore()
+		{
+			return AutomationControlType.Pane;
+		}
+
+		protected override string GetClassNameCore()
+		{
+			return nameof(Panel);
+		}
+
+		protected override bool IsControlElementCore() => true;
+
+		protected override bool IsContentElementCore() => true;
+	}
+}

src/Core/src/PublicAPI/net-windows/PublicAPI.Unshipped.txt

@@ -1 +1,2 @@
 #nullable enable
+override Microsoft.Maui.Platform.ContentPanel.OnCreateAutomationPeer() -> Microsoft.UI.Xaml.Automation.Peers.AutomationPeer!