maui-linux/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Bugzilla40333.cs

using System;
using Xamarin.Forms.CustomAttributes;
using Xamarin.Forms.Internals;
#if UITEST
using NUnit.Framework;
#endif

namespace Xamarin.Forms.Controls.Issues
{
	[Preserve(AllMembers = true)]
	[Issue(IssueTracker.Bugzilla, 40333, "[Android] IllegalStateException: Recursive entry to executePendingTransactions", PlatformAffected.Android)]
	public class Bugzilla40333 : TestNavigationPage
	{
		const string StartNavPageTestId = "StartNavPageTest";
		const string OpenMasterId = "OpenMaster";
		const string StartTabPageTestId = "StartTabPageTest";
		const string StillHereId = "3 Still Here";
		const string ClickThisId = "2 Click This";

		protected override void Init()
		{
			var navButton = new Button { Text = "Test With NavigationPage", AutomationId = StartNavPageTestId };
			navButton.Clicked += (sender, args) => { PushAsync(new _40333MDP(false)); };

			var tabButton = new Button { Text = "Test With TabbedPage", AutomationId = StartTabPageTestId };
			tabButton.Clicked += (sender, args) => { PushAsync(new _40333MDP(true)); };

			var content = new ContentPage {
				Content = new StackLayout {
					Children = { navButton, tabButton }
				}
			};

			PushAsync(content);
		}

		[Preserve(AllMembers = true)]
		public class _40333MDP : TestMasterDetailPage
		{
			readonly bool _showTabVersion;

			public _40333MDP(bool showTabVersion)
			{
				_showTabVersion = showTabVersion;
			}

			protected override void Init()
			{
				if (_showTabVersion)
				{
					Master = new NavigationPage(new _40333TabPusher("Root")) { Title = "MasterNav" };
					Detail = new TabbedPage() { Title = "DetailNav", Children = { new _40333DetailPage("T1") } };
				}
				else
				{
					Master = new NavigationPage(new _40333NavPusher("Root")) { Title = "MasterNav" };
					Detail = new NavigationPage(new _40333DetailPage("Detail") { Title = "DetailPage" }) { Title = "DetailNav" };
				}
			}

			[Preserve(AllMembers = true)]
			public class _40333DetailPage : ContentPage
			{
				public _40333DetailPage(string title)
				{
					Title = title;

					var openMaster = new Button {
						Text = "Open Master",
						AutomationId = OpenMasterId
					};

					openMaster.Clicked += (sender, args) => ((MasterDetailPage)Parent.Parent).IsPresented = true;

					Content = new StackLayout() {
						Children = { new Label { Text = "Detail Text" }, openMaster }
					};
				}
			}

			[Preserve(AllMembers = true)]
			public class _40333NavPusher : ContentPage
			{
				readonly ListView _listView = new ListView();

				public _40333NavPusher(string title)
				{
					Title = title;

					_listView.ItemTemplate = new DataTemplate(() =>
					{
						var lbl = new Label();
						lbl.SetBinding(Label.TextProperty, ".");
						lbl.AutomationId = lbl.Text;

						var result = new ViewCell
						{
							View = new StackLayout
							{
								Orientation = StackOrientation.Horizontal,
								Children =
								{
									lbl
								}
							}
						};

						return result;
					});

					_listView.ItemsSource = new[] { "1", ClickThisId, StillHereId };
					_listView.ItemTapped += OnItemTapped;

					Content = new StackLayout {
						Children = { _listView }
					};
				}

				async void OnItemTapped(object sender, EventArgs e)
				{
					var masterNav = ((MasterDetailPage)this.Parent.Parent).Master.Navigation;

					var newTitle = $"{Title}.{_listView.SelectedItem}";
					await masterNav.PushAsync(new _40333NavPusher(newTitle));
				}

				protected override async void OnAppearing()
				{
					base.OnAppearing();

					var newPage = new _40333DetailPage(Title);

					var detailNav = ((MasterDetailPage)this.Parent.Parent).Detail.Navigation;
					var currentRoot = detailNav.NavigationStack[0];
					detailNav.InsertPageBefore(newPage, currentRoot);
					await detailNav.PopToRootAsync();
				}
			}

			[Preserve(AllMembers = true)]
			public class _40333TabPusher : ContentPage
			{
				readonly ListView _listView = new ListView();

				public _40333TabPusher(string title)
				{
					Title = title;

					_listView.ItemTemplate = new DataTemplate(() => {
						var lbl = new Label();
						lbl.SetBinding(Label.TextProperty, ".");
						lbl.AutomationId = lbl.Text;

						var result = new ViewCell {
							View = new StackLayout {
								Orientation = StackOrientation.Horizontal,
								Children =
								{
									lbl
								}
							}
						};

						return result;
					});

					_listView.ItemsSource = new[] { "1", ClickThisId, StillHereId };
					_listView.ItemTapped += OnItemTapped;

					Content = new StackLayout {
						Children = { _listView }
					};
				}

				async void OnItemTapped(object sender, EventArgs e)
				{
					var masterNav = ((MasterDetailPage)this.Parent.Parent).Master.Navigation;

					var newTitle = $"{Title}.{_listView.SelectedItem}";
					await masterNav.PushAsync(new _40333TabPusher(newTitle));
				}

				protected override void OnAppearing()
				{
					base.OnAppearing();

					var newPage = new _40333DetailPage(Title);

					var detailTab = (TabbedPage)((MasterDetailPage)this.Parent.Parent).Detail;

					detailTab.Children.Add(newPage);
					detailTab.CurrentPage = newPage;
				}
			}
		}

#if UITEST

#if __ANDROID__ // These tests don't work in iOS for unrelated reasons (see https://bugzilla.xamarin.com/show_bug.cgi?id=41085)

		static void IgnoreFormsApplicationActivity()
		{
			if (AppSetup.IsFormsApplicationActivity)
			{
				Assert.Ignore("This test only applies to FormsAppCompatActivity.");
			}
		}

		[Test]
		public void ClickingOnMenuItemInMasterDoesNotCrash_NavPageVersion()
		{
			IgnoreFormsApplicationActivity();

			RunningApp.Tap(q => q.Marked(StartNavPageTestId));
			RunningApp.WaitForElement(q => q.Marked(OpenMasterId));

			RunningApp.Tap(q => q.Marked(OpenMasterId));
			RunningApp.WaitForElement(q => q.Marked(ClickThisId));

			RunningApp.Tap(q => q.Marked(ClickThisId));
			RunningApp.WaitForElement(q => q.Marked(StillHereId)); // If the bug isn't fixed, the app will have crashed by now
		}

		[Test]
		public void ClickingOnMenuItemInMasterDoesNotCrash_TabPageVersion()
		{
			IgnoreFormsApplicationActivity();

			RunningApp.Tap(q => q.Marked(StartTabPageTestId));
			RunningApp.WaitForElement(q => q.Marked(OpenMasterId));

			RunningApp.Tap(q => q.Marked(OpenMasterId));
			RunningApp.WaitForElement(q => q.Marked(ClickThisId));

			RunningApp.Tap(q => q.Marked(ClickThisId));
			RunningApp.WaitForElement(q => q.Marked(StillHereId)); // If the bug isn't fixed, the app will have crashed by now
		}
#endif
#endif
	}
}