143 строки
3.2 KiB
C#
143 строки
3.2 KiB
C#
//
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// Unit tests for WeakAttribute
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//
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// Authors:
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// Alex Soto <alexsoto@microsoft.com>
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//
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//
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// Copyright 2018 Xamarin Inc. All rights reserved.
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//
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#if !NET // WeakAttribute is not supported in .NET
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using System;
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using Foundation;
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using SpriteKit;
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using ObjCRuntime;
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using NUnit.Framework;
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using System.Threading;
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using Xamarin.Utils;
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namespace MonoTouchFixtures {
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[TestFixture]
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[Preserve (AllMembers = true)]
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public partial class WeakReferenceTest {
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#if __WATCHOS__
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const int totalTestObjects = 500;
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#else
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const int totalTestObjects = 5000;
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#endif
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[SetUp]
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public void Setup ()
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{
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TestRuntime.AssertSystemVersion (ApplePlatform.WatchOS, 3, 0, throwIfOtherPlatform: false);
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TestRuntime.AssertSystemVersion (ApplePlatform.iOS, 7, 0, throwIfOtherPlatform: false);
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TestRuntime.AssertSystemVersion (ApplePlatform.MacOSX, 10, 9, throwIfOtherPlatform: false);
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}
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[Test]
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public void NoRetainCyclesExpectedTest ()
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{
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var thread = new Thread (delegate () {
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MyParentView.weakcount = 0;
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for (int i = 0; i < totalTestObjects; i++) {
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var parent = new MyParentView (useWeak: true);
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parent.TouchButton ();
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}
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});
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thread.Start ();
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thread.Join ();
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GC.Collect (0);
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GC.Collect ();
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GC.WaitForPendingFinalizers ();
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GC.WaitForPendingFinalizers ();
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TestRuntime.RunAsync (DateTime.Now.AddSeconds (30), () => { }, () => MyParentView.weakcount < totalTestObjects);
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Assert.That (MyParentView.weakcount, Is.LessThan (totalTestObjects), "No retain cycles expected");
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}
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[Test]
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public void RetainCyclesExpectedTest ()
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{
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var cache = new IntPtr [totalTestObjects];
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MyParentView.noweakcount = 0;
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for (int i = 0; i < totalTestObjects; i++) {
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var parent = new MyParentView (useWeak: false);
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parent.TouchButton ();
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cache [i] = parent.Handle;
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}
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GC.Collect (0);
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GC.Collect ();
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GC.WaitForPendingFinalizers ();
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Assert.That (MyParentView.noweakcount, Is.EqualTo (totalTestObjects), "Retain cycles expected");
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for (int i = 0; i < totalTestObjects; i++) {
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using (var parent = Runtime.GetNSObject<MyParentView> (cache[i])) {
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var child = (MyButton) parent.Children [0];
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child.RemoveStrongRef ();
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}
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}
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}
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}
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class MyParentView : SKScene {
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public static int weakcount;
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public static int noweakcount;
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bool useWeak;
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~MyParentView ()
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{
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if (useWeak)
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weakcount--;
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else
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noweakcount--;
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}
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public MyParentView (bool useWeak)
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{
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this.useWeak = useWeak;
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var child = new MyButton (this, useWeak);
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child.TouchUpInside += Child_TouchUpInside;
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AddChild (child);
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}
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public void TouchButton ()
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{
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((MyButton) Children [0]).FireTouch ();
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}
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void Child_TouchUpInside (object sender, EventArgs e)
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{
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if (useWeak)
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weakcount++;
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else
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noweakcount++;
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((MyButton) sender).TouchUpInside -= Child_TouchUpInside;
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}
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}
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class MyButton : SKNode {
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MyParentView strong;
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[Weak] MyParentView weak;
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public MyButton (MyParentView parent, bool useWeak)
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{
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if (useWeak)
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weak = parent;
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else
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strong = parent;
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}
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public event EventHandler<EventArgs> TouchUpInside;
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public void FireTouch () => TouchUpInside?.Invoke (this, EventArgs.Empty);
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public void RemoveStrongRef () => strong = null;
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}
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}
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#endif // !NET
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