chore: Workaround test to pass on android

src/Uno.Toolkit.RuntimeTests/Tests/TabBarTests.cs

@@ -436,15 +436,20 @@ public async Task Verify_ItemTemplated_Disabled_Not_Selectable()
 				new TestRecord("False", false),
 				new TestRecord("True", true)
 			};
-			var SUT = new TabBar
-			{
-				Style = (Style)Application.Current.Resources["TopTabBarStyle"],
-				ItemsSource = source,
-				ItemTemplate = XamlHelper.LoadXaml<DataTemplate>(@"
+
+			var dt = XamlHelper.LoadXaml<DataTemplate>(@"
 					<DataTemplate>
 						<utu:TabBarItem Content=""{Binding Name}"" IsSelectable=""{Binding IsSelectable}"" />
 					</DataTemplate>
-				")
+				");
+
+			var SUT = new TabBar
+			{
+				// If `ItemTemplate` is not set first then the order of
+				// `OnItemTemplateChanged` and `GetContainerForItemOverride` are not correct and test fail on android
+				ItemTemplate = dt,
+				Style = (Style)Application.Current.Resources["TopTabBarStyle"],
+				ItemsSource = source
 			};
 
 			await UnitTestUIContentHelperEx.SetContentAndWait(SUT);

src/Uno.Toolkit.UI/Controls/TabBar/TabBar.cs

@@ -410,9 +410,9 @@ private void RaiseSelectionChangedEvent(object? prevItem, object? nextItem)
 
 		internal TabBarItem? GetInnerContainer(DependencyObject? container)
 		{
-			if (IsUsingOwnContainerAsTemplateRoot)
+			if (IsUsingOwnContainerAsTemplateRoot && container is ContentPresenter cp)
 			{
-				return (container as ContentPresenter)?.Content as TabBarItem;
+				return cp.Content as TabBarItem;
 			}
 
 			return container as TabBarItem;
@@ -421,9 +421,9 @@ private void RaiseSelectionChangedEvent(object? prevItem, object? nextItem)
 		internal DependencyObject? InnerContainerFromIndex(int index)
 		{
 			var container = ContainerFromIndex(index);
-			if (IsUsingOwnContainerAsTemplateRoot)
+			if (IsUsingOwnContainerAsTemplateRoot && container is ContentPresenter cp)
 			{
-				container = (container as ContentPresenter)?.Content as DependencyObject;
+				container = cp.Content as DependencyObject;
 			}
 
 			return container;