maui-linux/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Bugzilla38978.cs

using System;
using System.Linq;

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.Bugzilla, 38978, "Cell.ForceUpdateSize issues with row selection/deselection (ViewCell)", PlatformAffected.Android)]
	public class Bugzilla38978 : TestContentPage // or TestMasterDetailPage, etc ...
	{
		[Preserve (AllMembers = true)]
		public class MyViewCell : ViewCell
		{
			Image _image;
			public MyViewCell ()
			{
				_image = new Image {
					Source = ImageSource.FromFile ("oasis.jpg"),
					HeightRequest = 50
				};

				Label label = new Label { Text = "Click the image to resize", VerticalOptions = LayoutOptions.Center };

				var tapGestureRecognizer = new TapGestureRecognizer ();
				tapGestureRecognizer.Tapped += (object sender, EventArgs e) => {
					if (_image.HeightRequest < 250) {
						_image.HeightRequest = _image.Height + 100;
						ForceUpdateSize ();
						label.Text = "If the tapped image is not larger, this test has failed.";
					}
				};
				_image.GestureRecognizers.Add (tapGestureRecognizer);

				var stackLayout = new StackLayout {
					Padding = new Thickness (20, 5, 5, 5),
					Orientation = StackOrientation.Horizontal,
					Children = {
						_image,
						label
					}
				};

				View = stackLayout;
			}

			protected override void OnBindingContextChanged ()
			{
				base.OnBindingContextChanged ();
				var item = BindingContext?.ToString();
				if (string.IsNullOrWhiteSpace (item))
					return;

				_image.AutomationId = item;
			}
		}

		protected override void Init ()
		{
			var listView = new ListView {
				HasUnevenRows = true,
				ItemTemplate = new DataTemplate (typeof (MyViewCell)),
				ItemsSource = Enumerable.Range (0, 10)
			};

			Content = new StackLayout {
				Padding = new Thickness (0, 20, 0, 0),
				Children = {
					listView
				}
			};
		}

#if UITEST
		[Test]
		[Category("ManualReview")]
		public void Bugzilla38978Test ()
		{
			RunningApp.WaitForElement (q => q.Marked ("2"));
			RunningApp.Tap (q => q.Marked ("2"));
			RunningApp.Screenshot("If the tapped image is not larger, this test has failed.");
		}
#endif
	}
}