test: Adjust all tests to use GetOpenPopupsForXamlRoot

src/SamplesApp/UITests.Shared/Microsoft_UI_Xaml_Controls/NavigationViewTests/Common/NavigationViewPage.xaml.cs

@@ -537,7 +537,7 @@ namespace MUXControlsTestApp
 
 		private void CopyGamesLabelButton_Click(object sender, RoutedEventArgs e)
 		{
-			var popups = VisualTreeHelper.GetOpenPopups(Windows.UI.Xaml.Window.Current);
+			var popups = VisualTreeHelper.GetOpenPopupsForXamlRoot(XamlRoot);
 			if (popups != null && popups.Count > 0)
 			{
 				var popup = popups[0];

src/SamplesApp/UITests.Shared/Microsoft_UI_Xaml_Controls/NavigationViewTests/Regression/NavigationViewRS4Page.xaml.cs

@@ -366,7 +366,7 @@ namespace MUXControlsTestApp
 
 		private void CopyGamesLabelButton_Click(object sender, RoutedEventArgs e)
 		{
-			var popups = VisualTreeHelper.GetOpenPopups(Windows.UI.Xaml.Window.Current);
+			var popups = VisualTreeHelper.GetOpenPopupsForXamlRoot(XamlRoot);
 			if (popups != null && popups.Count > 0)
 			{
 				var popup = popups[0];

src/SamplesApp/UITests.Shared/Microsoft_UI_Xaml_Controls/NavigationViewTests/TopMode/NavigationViewTopNavPage.xaml.cs

@@ -392,7 +392,7 @@ namespace MUXControlsTestApp
 
 		private void CopyGamesLabelButton_Click(object sender, RoutedEventArgs e)
 		{
-			var popups = VisualTreeHelper.GetOpenPopups(Windows.UI.Xaml.Window.Current);
+			var popups = VisualTreeHelper.GetOpenPopupsForXamlRoot(XamlRoot);
 			if (popups != null && popups.Count > 0)
 			{
 				var popup = popups[0];

src/Uno.UI.RuntimeTests/MUX/Microsoft_UI_Xaml_Controls/Breadcrumb/BreadcrumbTests.cs

@@ -307,7 +307,7 @@ namespace Windows.UI.Xaml.Tests.MUXControls.ApiTests
 
 					await RunOnUIThread.ExecuteAsync(() =>
 					{
-						var openPopups = VisualTreeHelper.GetOpenPopups(Window.Current);
+						var openPopups = VisualTreeHelper.GetOpenPopupsForXamlRoot(TestServices.WindowHelper.XamlRoot);
 						var flyout = openPopups[openPopups.Count - 1];
 						Verify.IsNotNull(flyout, "Flyout could not be retrieved");
 						var ellipsisItemsRepeater = TestUtilities.FindDescendents<ItemsRepeater>(flyout).Single();
@@ -389,7 +389,7 @@ namespace Windows.UI.Xaml.Tests.MUXControls.ApiTests
 
 					await RunOnUIThread.ExecuteAsync(() =>
 					{
-						var openPopups = VisualTreeHelper.GetOpenPopups(Window.Current);
+						var openPopups = VisualTreeHelper.GetOpenPopupsForXamlRoot(TestServices.WindowHelper.XamlRoot);
 						var flyout = openPopups[openPopups.Count - 1];
 						Verify.IsNotNull(flyout, "Flyout could not be retrieved");
 						var ellipsisItemsRepeater = TestUtilities.FindDescendents<ItemsRepeater>(flyout).Single();

src/Uno.UI.RuntimeTests/Tests/Windows_UI_Popups/Given_MessageDialog.cs

@@ -11,6 +11,7 @@ using Windows.UI.Xaml.Controls.Primitives;
 using Windows.UI.Xaml.Media;
 using static Private.Infrastructure.TestServices;
 using System.Linq;
+using Private.Infrastructure;
 #if HAS_UNO
 using Uno.UI.WinRT.Extensions.UI.Popups;
 #endif
@@ -87,7 +88,7 @@ namespace Uno.UI.RuntimeTests.Tests.Windows_UI_Popups
 
 		private int GetNonMessageDialogPopupsCount()
 		{
-			var popups = VisualTreeHelper.GetOpenPopups(Window.Current);
+			var popups = VisualTreeHelper.GetOpenPopupsForXamlRoot(TestServices.WindowHelper.XamlRoot);
 #if HAS_UNO
 			return popups.Count(p => p.Child is not MessageDialogContentDialog);
 #else

src/Uno.UI.RuntimeTests/Tests/Windows_UI_Xaml_Controls/Given_Button.cs

@@ -71,7 +71,7 @@ namespace Uno.UI.RuntimeTests.Tests.Windows_UI_Xaml_Controls
 
 				await TestServices.WindowHelper.WaitForIdle();
 
-				var popups = VisualTreeHelper.GetOpenPopups(Windows.UI.Xaml.Window.Current);
+				var popups = VisualTreeHelper.GetOpenPopupsForXamlRoot(TestServices.WindowHelper.XamlRoot);
 
 				var innerFlyoutItem = popups.Select(p
 					=> ((p.Child as MenuFlyoutPresenter)?.TemplatedRoot as FrameworkElement)?.FindName("innerFlyoutItem") as MenuFlyoutItem).Trim().FirstOrDefault();

src/Uno.UI.RuntimeTests/Tests/Windows_UI_Xaml_Media/Given_VisualTreeHelper.cs

@@ -27,22 +27,22 @@ namespace Uno.UI.RuntimeTests.Tests.Windows_UI_Xaml_Media
 			var flyout = new Flyout();
 			FlyoutBase.SetAttachedFlyout(button, flyout);
 			WindowHelper.WindowContent = button;
-			Assert.AreEqual(0, VisualTreeHelper.GetOpenPopups(Window.Current).Count);
+			Assert.AreEqual(0, VisualTreeHelper.GetOpenPopupsForXamlRoot(WindowHelper.XamlRoot).Count);
 			FlyoutBase.ShowAttachedFlyout(button);
-			Assert.AreEqual(1, VisualTreeHelper.GetOpenPopups(Window.Current).Count);
+			Assert.AreEqual(1, VisualTreeHelper.GetOpenPopupsForXamlRoot(WindowHelper.XamlRoot).Count);
 			flyout.Hide();
-			Assert.AreEqual(0, VisualTreeHelper.GetOpenPopups(Window.Current).Count);
+			Assert.AreEqual(0, VisualTreeHelper.GetOpenPopupsForXamlRoot(WindowHelper.XamlRoot).Count);
 		}
 
 		[TestMethod]
 		public void OpenPopups_Popups_Unique()
 		{
 			var popup = new Popup();
-			Assert.AreEqual(0, VisualTreeHelper.GetOpenPopups(Window.Current).Count);
+			Assert.AreEqual(0, VisualTreeHelper.GetOpenPopupsForXamlRoot(WindowHelper.XamlRoot).Count);
 			popup.IsOpen = true;
-			Assert.AreEqual(1, VisualTreeHelper.GetOpenPopups(Window.Current).Count);
+			Assert.AreEqual(1, VisualTreeHelper.GetOpenPopupsForXamlRoot(WindowHelper.XamlRoot).Count);
 			popup.IsOpen = false;
-			Assert.AreEqual(0, VisualTreeHelper.GetOpenPopups(Window.Current).Count);
+			Assert.AreEqual(0, VisualTreeHelper.GetOpenPopupsForXamlRoot(WindowHelper.XamlRoot).Count);
 		}
 
 		[TestMethod]
@@ -50,7 +50,7 @@ namespace Uno.UI.RuntimeTests.Tests.Windows_UI_Xaml_Media
 		{
 			var popup = new Popup();
 			popup.IsOpen = true;
-			CollectionAssert.Contains(VisualTreeHelper.GetOpenPopups(Window.Current).ToArray(), popup);
+			CollectionAssert.Contains(VisualTreeHelper.GetOpenPopupsForXamlRoot(WindowHelper.XamlRoot).ToArray(), popup);
 			popup.IsOpen = false;
 		}