maui-linux/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue889.cs

using System.Diagnostics;

using Xamarin.Forms.CustomAttributes;
using Xamarin.Forms.Internals;

#if UITEST
using NUnit.Framework;
using Xamarin.UITest;
#endif

namespace Xamarin.Forms.Controls.Issues
{
	[Preserve (AllMembers=true)]
	[Issue (IssueTracker.Github, 889, "Assigning to MasterDetailPage.Detail after construction doesn't work", PlatformAffected.Android | PlatformAffected.iOS)]
	public class Issue889 : TestMasterDetailPage
	{
		protected override void Init ()
		{
			var cells = new [] {
				new NavPageNameObject ("Page 1"),
				new NavPageNameObject ("Page 3"),
				new NavPageNameObject ("Page 4"),
				new NavPageNameObject ("Page 5"),
				new NavPageNameObject ("Page 6"),
				new NavPageNameObject ("Page 7"),
				new NavPageNameObject ("Page 8"),
			};

			var template = new DataTemplate (typeof (TextCell));
			template.SetBinding (TextCell.TextProperty, "PageName");

			var listView = new ListView { 
				ItemTemplate = template,
				ItemsSource = cells
			};

			listView.BindingContext = cells;

			listView.ItemTapped += (sender, e) => {
				var cellName = ((NavPageNameObject)e.Item).PageName;
				Detail = new CustomNavTabDetailPage (cellName);
			};

			var master = new ContentPage {
				Title = "Master",
				IconImageSource = "bank.png",
				Content = listView
			};



			Master = master;
			Detail = new CustomNavTabDetailPage ("Initial Page");
		}

		// Issue892
		// NavigationPage nested in MasterDetail not working as expected Android

#if UITEST
		[Test]
		[Description ("Reproduce app crash - Issue #983")]
		[UiTest (typeof(MasterDetailPage), "Detail")]
		public void Issue899TestsAppCrashWhenSwitchingTabs ()
		{
			RunningApp.Tap (q => q.Marked ("Push new page"));
			RunningApp.WaitForElement (q => q.Marked ("I have been pushed"));
			RunningApp.Screenshot ("Push page");
			RunningApp.Back ();
			RunningApp.Screenshot ("Navigate back");

			RunningApp.Tap (q => q.Marked ("Tab 2 Title"));
			RunningApp.Screenshot ("Go to second tab");
		}
#endif
	}

	public class CustomNavTabDetailPage : NavigationPage
	{
		public CustomNavTabDetailPage (string pageName)
		{
			PushAsync (new NestedNavTabPageRootView (pageName));
		}
	}

	public class NestedNavTabPageRootView : TabbedPage
	{
		public NestedNavTabPageRootView (string pageTitle)
		{
			Title = pageTitle;

			var tabOne = new ContentPage {
				Title = "Tab 1 Title",
				BackgroundColor = Color.FromHex ("#666"),
				Content = new StackLayout {
					Children = {
						new Button {
							Text = "Push new page",
							Command = new Command (() => Navigation.PushAsync (new NestedNavTabPageOneLevel ()))
						}
					}
				}
			};

			var tabTwo = new ContentPage {
				Title = "Tab 2 Title",
				BackgroundColor = Color.FromHex ("#BBB"),
				Content = new StackLayout {
					Children = {
						new Button {
							Text = "Push new page",
							Command = new Command (() => Navigation.PushAsync (new NestedNavTabPageOneLevel ()))
						}
					}
				}
			};

			tabOne.SetValue (IconImageSourceProperty, "bank.png");
			tabTwo.SetValue (IconImageSourceProperty, "coffee.png");
			Children.Add (tabOne);
			Children.Add (tabTwo);
		}
	}

	public class NestedNavTabPageOneLevel : ContentPage
	{
		public NestedNavTabPageOneLevel ()
		{
			Title = "One pushed";
			BackgroundColor = Color.FromHex("#999");

			Content = new StackLayout {
				Children = {
					new Label {
						TextColor = Color.Red,
						Text = "I have been pushed"
					}
				}
			};
		}
	}
}