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using System.Collections.Generic;
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, 37462, "Using App Compat/App Compat theme breaks Navigation.RemovePage on Android ",PlatformAffected.Android )]
public class Bugzilla37462 : TestNavigationPage
{
protected override void Init ()
{
var page1 = new ContentPage { Title = "Page 1" };
var button1 = new Button { Text = "Go To 2" };
var label1 = new Label { Text = "This is a label on page 1" };
page1.Content = new StackLayout { Children = { button1, label1 } };
page1.Appearing += (sender, args) => {
((IVisualElementController)page1).InvalidateMeasure(InvalidationTrigger.MeasureChanged);
};
var page2 = new ContentPage { Title = "Page 2" };
var button2 = new Button { Text = "Go To 3" };
var label2 = new Label { Text = "This is a label on page 2" };
page2.Content = new StackLayout { Children = { button2, label2 } };
var page3 = new ContentPage { Title = "Page 3" };
var button3 = new Button { Text = "Go To 4" };
var label3 = new Label { Text = "This is a label on page 3" };
page3.Content = new StackLayout { Children = { button3, label3 } };
var page4 = new ContentPage { Title = "Page 4" };
var button4 = new Button { Text = "Back to 1" };
var label4 = new Label { Text = "This is a label on page 4" };
page4.Content = new StackLayout { Children = { button4, label4 } };
button1.Clicked += async (sender, args) => { await Navigation.PushAsync (page2); };
button2.Clicked += async (sender, args) => { await Navigation.PushAsync (page3); };
button3.Clicked += async (sender, args) => { await Navigation.PushAsync (page4); };
button4.Clicked += async (sender, args) => {
List<Page> existingPages = Navigation.NavigationStack.ToList ();
// Clear all pages except current and home
foreach (Page page in existingPages) {
if (page.Title != "Page 1" && page.Title != "Page 4") {
Navigation.RemovePage (page);
}
}
await Navigation.PopAsync ();
};
Navigation.PushAsync (page1);
}
#if UITEST
[Test]
public void CanRemoveIntermediatePagesAndPopToFirstPage ()
{
// Start at page 1
RunningApp.WaitForElement ("Go To 2");
RunningApp.WaitForElement ("This is a label on page 1");
RunningApp.Tap ("Go To 2");
RunningApp.WaitForElement ("Go To 3");
RunningApp.Tap ("Go To 3");
RunningApp.WaitForElement ("Go To 4");
RunningApp.Tap ("Go To 4");
RunningApp.WaitForElement ("Back to 1");
RunningApp.Tap ("Back to 1");
// Clicking "Back to 1" should remove pages 2 and 3 from the stack
// Then call PopAsync, which should return to page 1
RunningApp.WaitForElement ("Go To 2");
RunningApp.WaitForElement ("This is a label on page 1");
}
#endif
}
}
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