[8.1/UWP] Fix PopToRootAsync functioning incorrectly (#185)

When using PopToRootAsync on 8.1/UWP, the stack was being cleared but
the actual page was not being set due to a missing event handler on the
NavigationPageRenderer.

1 files changed, 55 insertions, 0 deletions

diff --git a/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Bugzilla31806.cs b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Bugzilla31806.cs
new file mode 100644
index 00000000..60c68a03
--- /dev/null
+++ b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Bugzilla31806.cs
@@ -0,0 +1,55 @@
+using System;
+
+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, 31806, "[8.1/UWP] PopToRootAsync crashes due to not setting the current page correctly", PlatformAffected.WinRT)]
+	public class Bugzilla31806 : TestContentPage
+	{
+		protected override void Init()
+		{
+			Content = new StackLayout
+			{
+				Children =
+				{
+					new Button
+					{
+						Text = "Navigate to a new page",
+						Command = new Command(() =>
+						{
+							Navigation.PushAsync(new ContentPage
+							{
+								Content = new StackLayout
+								{
+									Children =
+									{
+										new Label
+										{
+											Text = "Pressing this button should let the navigation return to the repro list"
+										},
+										new Button
+										{
+											Text = "Call PopToRootAsync()",
+											Command = new Command(() =>
+											{
+												Navigation.PopToRootAsync();
+											})
+										}
+									}
+								}
+							});
+						})
+					}
+				}
+			};
+		}
+	}
+}