maui-linux/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue2927.cs

using System;
using System.ComponentModel;
using Xamarin.Forms.Controls;
using Xamarin.Forms.CustomAttributes;
using Xamarin.Forms.Internals;

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

namespace Xamarin.Forms.Controls.Issues
{
	[Preserve (AllMembers = true)]
	[Issue (IssueTracker.Github, 2927, "ListView item tapped not firing multiple times")]
	public class Issue2927 : TestContentPage // or TestMasterDetailPage, etc .
	{
		[Preserve (AllMembers = true)]
		public class Issue2927Cell : TextCell, INotifyPropertyChanged
		{
			int _numberOfTimesTapped;
			string _text;
			string _cellId;

			public Issue2927Cell (string id)
			{
				_cellId = id;
				NumberOfTimesTapped = 0;
			}

			void OnPropertyChanged (string prop)
			{
				var handler = PropertyChanged;
				if (handler != null) {
					handler(this, new PropertyChangedEventArgs(prop));
				}
			}

			public int NumberOfTimesTapped
			{
				get { return _numberOfTimesTapped; }
				set { 
					_numberOfTimesTapped = value;
					Text = _cellId + " " + _numberOfTimesTapped.ToString ();
				}
			}

			public string Text {
				get { return _text; }
				set { 
					_text = value;
					OnPropertyChanged ("Text");
				}
			}

			public event PropertyChangedEventHandler PropertyChanged;

		}

		protected override void Init ()
		{
			var cells = new[] {
				new Issue2927Cell ("Cell1"),
				new Issue2927Cell ("Cell2"),
				new Issue2927Cell ("Cell3"),
			};

			BindingContext = cells;
			var template = new DataTemplate (typeof (TextCell));
			template.SetBinding (TextCell.TextProperty, "Text");

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

			listView.ItemTapped += (s, e) => {
				var obj = (Issue2927Cell)e.Item;
				obj.NumberOfTimesTapped += 1;
			};

			Content = listView;
		}

#if UITEST
		[Test]
		public void Issue2927Test ()
		{
			RunningApp.Screenshot ("I am at Issue 2927");
			RunningApp.WaitForElement (q => q.Marked ("Cell1 0"));
			RunningApp.Tap (q => q.Marked ("Cell1 0"));
			RunningApp.WaitForElement (q => q.Marked ("Cell1 1"));
			RunningApp.Screenshot ("Tapped Once");
			RunningApp.Tap (q => q.Marked ("Cell1 1"));
			RunningApp.WaitForElement (q => q.Marked ("Cell1 2"));
			RunningApp.Screenshot ("Tapped Twice");
			RunningApp.Tap (q => q.Marked ("Cell3 0"));
			RunningApp.WaitForElement (q => q.Marked ("Cell3 1"));
			RunningApp.Screenshot ("Click other cell");
			RunningApp.Tap (q => q.Marked ("Cell1 2"));
			RunningApp.WaitForElement (q => q.Marked ("Cell1 3"));
			RunningApp.Screenshot ("Click first cell again");
		}
#endif
	}
}