Fix has color to use maui context on passed in view

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

@@ -118,30 +118,25 @@ public async Task ShellFlyoutBackgroundInitializesCorrectly(string colorHex)
 				shell.Items.Add(shellItem);
 			});
 
-			await InvokeOnMainThreadAsync(async () =>
+			await CreateHandlerAndAddToWindow<ShellHandler>(shell, async (handler) =>
 			{
-				await CreateHandlerAndAddToWindow<ShellHandler>(shell, (handler) =>
-				{
-					var rootNavView = handler.PlatformView;
-					var shellItemView = shell.CurrentItem.Handler.PlatformView as MauiNavigationView;
-					var expectedRoot = UI.Xaml.Controls.NavigationViewPaneDisplayMode.Left;
-					var expectedShellItems = UI.Xaml.Controls.NavigationViewPaneDisplayMode.LeftMinimal;
-
-					Assert.Equal(expectedRoot, rootNavView.PaneDisplayMode);
-					Assert.NotNull(shellItemView);
-					Assert.Equal(expectedShellItems, shellItemView.PaneDisplayMode);
+				var rootNavView = handler.PlatformView;
+				var shellItemView = shell.CurrentItem.Handler.PlatformView as MauiNavigationView;
+				var expectedRoot = UI.Xaml.Controls.NavigationViewPaneDisplayMode.Left;
+				var expectedShellItems = UI.Xaml.Controls.NavigationViewPaneDisplayMode.LeftMinimal;
 
-					return Task.CompletedTask;
-				});
+				Assert.Equal(expectedRoot, rootNavView.PaneDisplayMode);
+				Assert.NotNull(shellItemView);
+				Assert.Equal(expectedShellItems, shellItemView.PaneDisplayMode);
 
-				await AssertionExtensions.Wait(() =>
+				await AssertionExtensions.AssertEventually(() =>
 				{
-					var platformView = shell.Handler.PlatformView as FrameworkElement;
-					return platformView is not null && (platformView.Height > 0 || platformView.Width > 0);
+					var platformView = shell.CurrentPage.Handler.PlatformView as FrameworkElement;
+					return platformView is not null && (platformView.ActualHeight > 0 || platformView.ActualWidth > 0);
 				});
-			});
 
-			await ValidateHasColor(shell, expectedColor, typeof(ShellHandler));
+				await ValidateHasColor(shell, expectedColor, typeof(ShellHandler));
+			});
 		}
 
 		[Fact(DisplayName = "Back Button Enabled/Disabled")]

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

@@ -1025,7 +1025,9 @@ await CreateHandlerAndAddToWindow<ShellHandler>(shell, async (handler) =>
 			Assert.False(pageReference.IsAlive, "Page should not be alive!");
 		}
 
-		[Fact(DisplayName = "HideSoftInputOnTapped Doesnt Crash If Entry Is Still Focused After Window Is Null")]
+		//HideSoftInputOnTapped doesn't currently do anything on windows
+#if !WINDOWS
+		[Fact(DisplayName = "HideSoftInputOnTapped Doesn't Crash If Entry Is Still Focused After Window Is Null")]
 		public async Task HideSoftInputOnTappedDoesntCrashIfEntryIsStillFocusedAfterWindowIsNull()
 		{
 			SetupBuilder();
@@ -1067,6 +1069,7 @@ ContentPage CreatePage(out Entry entry)
 				};
 			}
 		}
+#endif
 
 		[Fact(DisplayName = "Can Reuse Pages")]
 		public async Task CanReusePages()

src/Core/tests/DeviceTests.Shared/HandlerTests/HandlerTestBasement.cs

@@ -166,30 +166,40 @@ protected TCustomHandler CreateHandler<THandler, TCustomHandler>(IElement elemen
 			return handler;
 		}
 
-		protected IPlatformViewHandler CreateHandler(IElement view, Type handlerType)
+		protected IPlatformViewHandler CreateHandler(IElement view, Type handlerType) =>
+			CreateHandler(view, handlerType, MauiContext);
+
+		protected IPlatformViewHandler CreateHandler(IElement view, Type handlerType, IMauiContext mauiContext)
 		{
 			if (view.Handler is IPlatformViewHandler t)
 				return t;
 
 			var handler = (IPlatformViewHandler)Activator.CreateInstance(handlerType);
-			InitializeViewHandler(view, handler, MauiContext);
+			InitializeViewHandler(view, handler, mauiContext);
 			return handler;
 
 		}
 
-		protected Task ValidateHasColor(IView view, Color color, Type handlerType, Action action = null, string updatePropertyValue = null, double? tolerance = null)
+		protected Task ValidateHasColor(
+			IView view, 
+			Color color, 
+			Type handlerType, 
+			Action action = null, 
+			string updatePropertyValue = null,
+			double? tolerance = null)
 		{
 			return InvokeOnMainThreadAsync(async () =>
 			{
-				var handler = CreateHandler(view, handlerType);
+				var mauiContext = view?.Handler?.MauiContext ?? MauiContext;
+				var handler = CreateHandler(view, handlerType, mauiContext);
 				var plaformView = handler.ToPlatform();
 				action?.Invoke();
 				if (!string.IsNullOrEmpty(updatePropertyValue))
 				{
 					handler.UpdateValue(updatePropertyValue);
 				}
 
-				await plaformView.AssertContainsColor(color, MauiContext, tolerance: tolerance);
+				await plaformView.AssertContainsColor(color, mauiContext, tolerance: tolerance);
 			});
 		}
 

src/TestUtils/src/DeviceTests/AssertionExtensions.Windows.cs

@@ -171,6 +171,9 @@ public static async Task<T> AttachAndRun<T>(this FrameworkElement view, Func<Win
 				// Window is not a XAML type so is never on the hierarchy
 				var window = (Window)mauiContext!.Services!.GetService(typeof(Window))!;
 
+				Assert.True(window?.Content is not null, 
+					"Content on Window has not been set. Most likely the window under test isn't being registered against the test service being used. Check if you're passing the right MauiContext in");
+
 				if (window.Content.XamlRoot != view.XamlRoot)
 					throw new Exception("The window retrieved from the service is different than the window this view is attached to");