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using System;
using System.Collections.Generic;
using Xamarin.Forms.Internals;
using Xamarin.Forms.CustomAttributes;
#if UITEST
using Xamarin.UITest;
using NUnit.Framework;
using Xamarin.Forms.Core.UITests;
#endif
namespace Xamarin.Forms.Controls.Issues
{
#if UITEST
[Category(UITestCategories.ListView)]
#endif
[Preserve(AllMembers = true)]
[Issue(IssueTracker.Bugzilla, 42832, "Scrolling a ListView with active ContextAction Items causes NRE", PlatformAffected.Android)]
public class Bugzilla42832 : TestContentPage
{
ListView listview;
protected override void Init()
{
var items = new List<string>();
for(int i=0; i<20; i++)
items.Add($"Item #{i}");
var template = new DataTemplate(typeof(TestCell));
template.SetBinding(TextCell.TextProperty, ".");
listview = new ListView(ListViewCachingStrategy.RetainElement)
{
AutomationId = "mainList",
ItemsSource = items,
ItemTemplate = template
};
Content = listview;
}
[Preserve(AllMembers = true)]
public class TestCell : TextCell
{
public TestCell()
{
var menuItem = new MenuItem { Text = "Test Item" };
ContextActions.Add(menuItem);
}
}
#if UITEST && __ANDROID__
[Test]
public void ContextActionsScrollNRE()
{
RunningApp.TouchAndHold(q => q.Marked("Item #0"));
RunningApp.WaitForElement(q => q.Marked("Test Item"));
int counter = 0;
while(counter < 5)
{
RunningApp.ScrollDownTo("Item #15", "mainList", ScrollStrategy.Gesture, timeout:TimeSpan.FromMinutes(1));
RunningApp.ScrollUpTo("Item #0", "mainList", ScrollStrategy.Gesture, timeout: TimeSpan.FromMinutes(1));
counter++;
}
RunningApp.Screenshot("If the app did not crash, then the test has passed.");
}
#endif
}
}
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