1 files changed, 140 insertions, 0 deletions
diff --git a/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue2951.xaml.cs b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue2951.xaml.cs
new file mode 100644
index 00000000..fb4b75ea
--- /dev/null
+++ b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue2951.xaml.cs
@@ -0,0 +1,140 @@
+using System;
+using System.Collections.Generic;
+using Xamarin.Forms;
+using Xamarin.Forms.CustomAttributes;
+using System.Collections.ObjectModel;
+using System.ComponentModel;
+#if UITEST
+using Xamarin.UITest.Queries;
+using NUnit.Framework;
+#endif
+
+
+namespace Xamarin.Forms.Controls
+{
+	[Preserve (AllMembers = true)]
+	[Issue (IssueTracker.Github, 2951, "On Android, button background is not updated when color changes ")]
+	public partial class Issue2951 : TestContentPage
+	{
+		public Issue2951 ()
+		{
+			#if APP
+			InitializeComponent ();
+			#endif
+		}
+
+		protected override void Init ()
+		{
+			BindingContext = new MyViewModel ();
+		}
+
+		[Preserve (AllMembers = true)]
+		public class MyViewModel
+		{
+			public ObservableCollection<MyItemViewModel> Items { get; private set; }
+
+			public Command<MyItemViewModel> ButtonTapped { get; private set; }
+
+			public MyViewModel ()
+			{
+				ButtonTapped = new Command<MyItemViewModel> (OnItemTapped);
+
+				Items = new ObservableCollection<MyItemViewModel> ();
+
+				Items.Add (new MyItemViewModel { Name = "A", IsStarted = false });
+				Items.Add (new MyItemViewModel { Name = "B", IsStarted = false });
+				Items.Add (new MyItemViewModel { Name = "C", IsStarted = false });
+			}
+
+			void OnItemTapped (MyItemViewModel model)
+			{
+				if (model.IsStarted) {
+					Items.Remove (model);
+				} else {
+					model.IsStarted = true;
+				}
+			}
+		}
+
+		[Preserve (AllMembers = true)]
+		public class MyItemViewModel : INotifyPropertyChanged
+		{
+			public event PropertyChangedEventHandler PropertyChanged;
+
+			string _name;
+
+			public string Name {
+				get { return _name; } 
+				set {
+					_name = value;
+					OnPropertyChanged ("Name");
+				}
+			}
+
+			bool _isStarted;
+
+			public bool IsStarted {
+				get { return _isStarted; } 
+				set {
+					_isStarted = value;
+					OnPropertyChanged ("IsStarted");
+				}
+			}
+
+			void OnPropertyChanged (string propertyName)
+			{
+				if (PropertyChanged != null) {
+					PropertyChanged (this, new PropertyChangedEventArgs (propertyName));
+				}
+			}
+		}
+	
+		#if UITEST
+		[Test]
+		public void Issue2951Test ()
+		{
+			var bt = RunningApp.WaitForElement (c => c.Marked ("btnChangeStatus"));
+			var buttons = RunningApp.Query (c => c.Marked ("btnChangeStatus"));
+			Assert.That (buttons.Length, Is.EqualTo (3));
+			RunningApp.Tap(c => c.Marked ("btnChangeStatus").Index(1));
+			buttons = RunningApp.Query (c => c.Marked ("btnChangeStatus"));
+			var text = buttons [1].Text ?? buttons [1].Label;
+			Assert.That (text, Is.EqualTo ("B"));
+			RunningApp.Tap(c => c.Marked ("btnChangeStatus").Index(1));
+			buttons = RunningApp.Query (c => c.Marked ("btnChangeStatus"));
+			Assert.That (buttons.Length, Is.EqualTo (2));
+			//TODO: we should check the color of the button
+			//var buttonTextColor = GetProperty<Color> ("btnChangeStatus", Button.BackgroundColorProperty);
+			//Assert.AreEqual (Color.Pink, buttonTextColor);
+		}
+
+	
+		#endif
+	}
+
+
+	
+
+	[Preserve (AllMembers = true)]
+	public class ButtonExtensions
+	{
+		public static readonly BindableProperty IsPrimaryProperty = BindableProperty.CreateAttached<ButtonExtensions, bool> (
+			                                                            bindable => GetIsPrimary (bindable),
+			                                                            false,
+			                                                            BindingMode.TwoWay,
+			                                                            null,
+			                                                            null,
+			                                                            null,
+			                                                            null);
+
+		public static bool GetIsPrimary (BindableObject bo)
+		{
+			return (bool)bo.GetValue (IsPrimaryProperty);
+		}
+
+		public static void SetIsPrimary (BindableObject bo, bool value)
+		{
+			bo.SetValue (IsPrimaryProperty, value);
+		}
+	}
+}