/****************************************************************************
|
**
|
** Copyright (C) 2022 The Qt Company Ltd.
|
** Contact: https://www.qt.io/licensing/
|
**
|
** This file is part of the Qt VS Tools.
|
**
|
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
|
** Commercial License Usage
|
** Licensees holding valid commercial Qt licenses may use this file in
|
** accordance with the commercial license agreement provided with the
|
** Software or, alternatively, in accordance with the terms contained in
|
** a written agreement between you and The Qt Company. For licensing terms
|
** and conditions see https://www.qt.io/terms-conditions. For further
|
** information use the contact form at https://www.qt.io/contact-us.
|
**
|
** GNU General Public License Usage
|
** Alternatively, this file may be used under the terms of the GNU
|
** General Public License version 3 as published by the Free Software
|
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
|
** included in the packaging of this file. Please review the following
|
** information to ensure the GNU General Public License requirements will
|
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
|
**
|
** $QT_END_LICENSE$
|
**
|
****************************************************************************/
|
|
using System.Collections.Concurrent;
|
using System.Diagnostics;
|
using System.Threading;
|
using System.Threading.Tasks;
|
using Microsoft.VisualStudio.TestTools.UnitTesting;
|
|
namespace QtVsTools.Test.Core
|
{
|
using Common;
|
|
[TestClass]
|
public class Test_LazyFactory
|
{
|
class LazyClass
|
{
|
LazyFactory Lazy { get; } = new LazyFactory();
|
|
public ConcurrentBag<int> InitThread { get; } = new ConcurrentBag<int>();
|
public string LazyProperty => Lazy.Get(() =>
|
LazyProperty, () =>
|
{
|
InitThread.Add(Thread.CurrentThread.ManagedThreadId);
|
return "LAZYVALUE";
|
});
|
}
|
|
[TestMethod]
|
public void Test_ThreadSafety()
|
{
|
var lazyObject = new LazyClass();
|
var task = Task.Run(async () =>
|
{
|
var tasks = new Task[3000];
|
for (int i = 0; i < tasks.Length; i++) {
|
var n = i;
|
tasks[i] = Task.Run(() =>
|
{
|
Debug.WriteLine($"Lazy value #{n} is {lazyObject.LazyProperty}");
|
});
|
}
|
await Task.WhenAll(tasks);
|
});
|
while (!task.IsCompleted)
|
Thread.Sleep(100);
|
|
Assert.IsTrue(lazyObject.InitThread.Count == 1);
|
}
|
}
|
}
|
