Fix iOS Shell Tests (still no CI <3)

src/Controls/src/Core/Compatibility/Handlers/Shell/iOS/ShellPageRendererTracker.cs

@@ -141,7 +141,14 @@ protected virtual void UpdateTabBarVisible()
 
 		void OnToolbarPropertyChanged(object sender, PropertyChangedEventArgs e)
 		{
-			UpdateTitle();
+			if (e.PropertyName == Shell.TitleViewProperty.PropertyName)
+			{
+				UpdateTitleView();
+			}
+			else if (e.PropertyName == Page.TitleProperty.PropertyName)
+			{
+				UpdateTitle();
+			}
 		}
 
 		protected virtual void UpdateTitle()
@@ -168,7 +175,7 @@ protected virtual void OnPageSet(Page oldPage, Page newPage)
 			{
 				oldPage.Appearing -= PageAppearing;
 				oldPage.PropertyChanged -= OnPagePropertyChanged;
-				newPage.Loaded -= OnPageLoaded;
+				oldPage.Loaded -= OnPageLoaded;
 				((INotifyCollectionChanged)oldPage.ToolbarItems).CollectionChanged -= OnToolbarItemsChanged;
 			}
 
@@ -207,7 +214,13 @@ protected virtual void OnRendererSet()
 
 		protected virtual void UpdateTitleView()
 		{
-			var titleView = _context.Shell.GetEffectiveValue<View>(Shell.TitleViewProperty, () => Shell.GetTitleView(_context.Shell), null, Page);
+			var titleView = _context.Shell.Toolbar.TitleView as View;
+
+			if (NavigationItem.TitleView is TitleViewContainer tvc &&
+				tvc.View == titleView)
+			{
+				return;
+			}
 
 			if (titleView == null)
 			{

src/Controls/tests/DeviceTests/Elements/Editor/EditorTests.iOS.cs

@@ -1,9 +1,11 @@
 using System.Threading.Tasks;
 using Microsoft.Maui.Handlers;
 using Microsoft.Maui.Platform;
+using Xunit;
 
 namespace Microsoft.Maui.DeviceTests
 {
+	[Collection(HandlerTestBase.RunInNewWindowCollection)]
 	public partial class EditorTests
 	{
 		MauiTextView GetPlatformControl(EditorHandler handler) =>

src/Controls/tests/DeviceTests/Elements/FlyoutPage/FlyoutPageTests.iOS.cs

@@ -0,0 +1,9 @@
+using Xunit;
+
+namespace Microsoft.Maui.DeviceTests
+{
+	[Collection(HandlerTestBase.RunInNewWindowCollection)]
+	public partial class FlyoutPageTests
+	{
+	}
+}

src/Controls/tests/DeviceTests/Elements/ListView/ListViewTests.cs

@@ -8,6 +8,7 @@
 
 namespace Microsoft.Maui.DeviceTests
 {
+	[Collection(HandlerTestBase.RunInNewWindowCollection)]
 	[Category(TestCategory.ListView)]
 	public partial class ListViewTests : HandlerTestBase
 	{

src/Controls/tests/DeviceTests/Elements/Modal/ModalTests.cs

@@ -17,7 +17,7 @@
 namespace Microsoft.Maui.DeviceTests
 {
 	[Category(TestCategory.Modal)]
-#if ANDROID
+#if ANDROID || IOS
 	[Collection(HandlerTestBase.RunInNewWindowCollection)]
 #endif
 	public partial class ModalTests : HandlerTestBase

src/Controls/tests/DeviceTests/Elements/NavigationPage/NavigationPageTests.iOS.cs

@@ -0,0 +1,9 @@
+using Xunit;
+
+namespace Microsoft.Maui.DeviceTests
+{
+	[Collection(HandlerTestBase.RunInNewWindowCollection)]
+	public partial class NavigationPageTests : HandlerTestBase
+	{
+	}
+}

src/Controls/tests/DeviceTests/Elements/PlatformBehaviorTests.cs

@@ -21,7 +21,7 @@
 namespace Microsoft.Maui.DeviceTests
 {
 	[Category(TestCategory.Behavior)]
-#if ANDROID
+#if ANDROID || IOS
 	[Collection(HandlerTestBase.RunInNewWindowCollection)]
 #endif
 	public partial class PlatformBehaviorTests : HandlerTestBase

src/Controls/tests/DeviceTests/Elements/Shell/ShellTests.cs

@@ -71,6 +71,7 @@ public async Task FlyoutContentRenderersWhenFlyoutBehaviorStartsAsLocked()
 			});
 		}
 
+#if !IOS
 		[Fact(DisplayName = "Flyout Starts as Open correctly")]
 		public async Task FlyoutIsPresented()
 		{
@@ -88,7 +89,7 @@ public async Task FlyoutIsPresented()
 				await CheckFlyoutState(handler, false);
 			});
 		}
-
+#endif
 
 		[Fact(DisplayName = "Back Button Visibility Changes with push/pop")]
 		public async Task BackButtonVisibilityChangesWithPushPop()
@@ -114,12 +115,9 @@ public async Task SetHasBackButton()
 		{
 			SetupBuilder();
 
-			var shell = await InvokeOnMainThreadAsync<Shell>(() =>
+			var shell = await CreateShellAsync(shell =>
 			{
-				return new Shell()
-				{
-					Items = { new ContentPage() }
-				};
+				shell.CurrentItem = new ContentPage();
 			});
 
 			await CreateHandlerAndAddToWindow<ShellHandler>(shell, async (handler) =>

src/Controls/tests/DeviceTests/Elements/VisualElementTests.cs

@@ -10,7 +10,7 @@
 namespace Microsoft.Maui.DeviceTests
 {
 	[Category(TestCategory.VisualElement)]
-#if ANDROID
+#if ANDROID || IOS
 	[Collection(HandlerTestBase.RunInNewWindowCollection)]
 #endif
 	public partial class VisualElementTests : HandlerTestBase

src/Controls/tests/DeviceTests/HandlerTestBase.iOS.cs

@@ -59,7 +59,14 @@ Task RunWindowTest<THandler>(IWindow window, Func<THandler, Task> action)
 								await controlsWindow.Navigation.PopModalAsync();
 						}
 
-						window.Handler.DisconnectHandler();
+						if (window.Handler is WindowHandlerStub whs)
+						{
+							window.Handler.DisconnectHandler();
+							await whs.FinishedDisconnecting;
+						}
+						else
+							window.Handler.DisconnectHandler();
+
 					}
 				}
 			});
@@ -72,31 +79,47 @@ internal ModalWrapper GetModalWrapper(Page modalPage)
 		}
 
 		protected bool IsBackButtonVisible(IElementHandler handler)
+		{
+			var vcs = GetActiveChildViewControllers(handler);
+
+			if (vcs.Length <= 1)
+				return false;
+
+			return !vcs[vcs.Length - 1].NavigationItem.HidesBackButton;
+		}
+
+		protected object GetTitleView(IElementHandler handler)
+		{
+			var activeVC = GetVisibleViewController(handler);
+			if ( activeVC.NavigationItem.TitleView is
+				ShellPageRendererTracker.TitleViewContainer tvc)
+			{
+				return tvc.View.Handler.PlatformView;
+			}
+
+			return null;
+		}
+
+		UIViewController[] GetActiveChildViewControllers(IElementHandler handler)
 		{
 			if (handler is ShellRenderer renderer)
 			{
 				if (renderer.ChildViewControllers[0] is ShellItemRenderer sir)
 				{
 					if (sir.ChildViewControllers[0] is ShellSectionRenderer ssr)
 					{
-						// Nothing has been pushed to the stack
-						if (ssr.ChildViewControllers.Length == 1)
-							return false;
-
-						var activeVC =
-							ssr.ChildViewControllers[ssr.ChildViewControllers.Length - 1];
-
-						return !activeVC.NavigationItem.HidesBackButton;
+						return ssr.ChildViewControllers;
 					}
 				}
 			}
 
 			throw new NotImplementedException();
 		}
 
-		protected object GetTitleView(IElementHandler handler)
+		UIViewController GetVisibleViewController(IElementHandler handler)
 		{
-			throw new NotImplementedException();
+			var vcs = GetActiveChildViewControllers(handler);
+			return vcs[vcs.Length - 1];
 		}
 	}
 }

src/Controls/tests/DeviceTests/Stubs/WindowHandlerStub.iOS.cs

@@ -1,5 +1,7 @@
 using System;
+using System.Threading.Tasks;
 using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Maui.Controls;
 using Microsoft.Maui.Handlers;
 using Microsoft.Maui.Platform;
 using UIKit;
@@ -8,6 +10,9 @@ namespace Microsoft.Maui.DeviceTests
 {
 	public class WindowHandlerStub : ElementHandler<IWindow, UIWindow>, IWindowHandler
 	{
+		TaskCompletionSource<bool> _finishedDisconnecting = new TaskCompletionSource<bool>();
+		public Task FinishedDisconnecting => _finishedDisconnecting.Task;
+
 		public static IPropertyMapper<IWindow, WindowHandlerStub> WindowMapper = new PropertyMapper<IWindow, WindowHandlerStub>(WindowHandler.Mapper)
 		{
 			[nameof(IWindow.Content)] = MapContent
@@ -16,15 +21,45 @@ public class WindowHandlerStub : ElementHandler<IWindow, UIWindow>, IWindowHandl
 		private static void MapContent(WindowHandlerStub handler, IWindow window)
 		{
 			var view = window.Content.ToPlatform(handler.MauiContext);
-			handler.PlatformView.RootViewController.View.AddSubview(view);
+
+			if (window.Content is Shell)
+			{
+				var vc =
+					(window.Content.Handler as IPlatformViewHandler)
+						.ViewController;
+
+				handler.PlatformView.RootViewController.PresentViewController(vc, false, null);
+			}
+			else
+			{
+				handler.PlatformView.RootViewController.View.AddSubview(view);
+			}
 		}
 
 		protected override void DisconnectHandler(UIWindow platformView)
 		{
-			VirtualView
-				.Content
-				.ToPlatform()
-				.RemoveFromSuperview();
+			var vc = (VirtualView.Content.Handler as IPlatformViewHandler)
+							.ViewController;
+
+			if (VirtualView.Content is Shell)
+			{
+				platformView.RootViewController
+					.PresentedViewController.
+					DismissViewController(false,
+					() =>
+					{
+						_finishedDisconnecting.SetResult(true);
+					});
+			}
+			else
+			{
+				VirtualView
+					.Content
+					.ToPlatform()
+					.RemoveFromSuperview();
+
+				_finishedDisconnecting.SetResult(true);
+			}
 
 			base.DisconnectHandler(platformView);
 		}