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Issue5555.cs
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Issue5555.cs
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using System;
using System.Collections.Generic;
using Xamarin.Forms.CustomAttributes;
using Xamarin.Forms.Internals;
#if UITEST
using NUnit.Framework;
using Xamarin.UITest;
using Xamarin.Forms.Core.UITests;
#endif
namespace Xamarin.Forms.Controls.Issues
{
[Preserve(AllMembers = true)]
[Issue(IssueTracker.Github, 5555, "Memory leak when SwitchCell or EntryCell", PlatformAffected.iOS)]
public class Issue5555 : TestContentPage
{
[Preserve(AllMembers = true)]
class LeakPage : ContentPage
{
public LeakPage()
{
Content = new StackLayout
{
Children = {
new TableView
{
Root = new TableRoot
{
new TableSection
{
new SwitchCell { Text = "switch cell", On = true },
new EntryCell { Text = "entry cell" }
}
}
}
}
};
}
}
protected override void Init ()
{
var result = new Label {
FontSize = 16,
Text = "Click 'Push page' twice"
};
var list = new List<WeakReference>();
var checkButton = new Button
{
Text = "Check Result",
IsEnabled = false,
Command = new Command(() =>
{
if (list.Count < 2)
{
result.Text = "Click 'Push page' again";
return;
}
GarbageCollectionHelper.Collect();
result.Text = list[list.Count - 2].IsAlive ? "Failed" : "Success";
})
};
Content = new StackLayout {
Children = {
result,
new Button
{
Text = "Push page",
Command = new Command(async() => {
var page = new LeakPage();
var wref = new WeakReference(page);
await Navigation.PushAsync(page);
await page.Navigation.PopAsync();
GarbageCollectionHelper.Collect();
list.Add(wref);
if (list.Count > 1)
{
checkButton.IsEnabled = true;
result.Text = "You can check result";
}
else
{
result.Text = "Again";
}
})
},
checkButton
}
};
}
#if UITEST
[Test]
public void Issue5555Test()
{
RunningApp.Tap(q => q.Marked("Push page"));
RunningApp.WaitForElement(q => q.Marked("Push page"));
RunningApp.Tap(q => q.Marked("Push page"));
RunningApp.WaitForElement(q => q.Marked("Push page"));
RunningApp.WaitForElement(q => q.Marked("You can check result"));
RunningApp.Tap(q => q.Marked("Check Result"));
RunningApp.WaitForElement(q => q.Marked("Success"));
}
#endif
}
}