/mcs/class/corlib/Test/System.Threading/SemaphoreSlimTests.cs

#if NET_4_0
// SemaphoreSlimTests.cs
//
// Copyright (c) 2008 Jérémie "Garuma" Laval
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
//

using System;
using System.Linq;
using System.Threading;

using NUnit.Framework;

namespace ParallelFxTests
{
	[TestFixture]
	public class SemaphoreSlimTests
	{
		SemaphoreSlim sem;
		SemaphoreSlim semMax;
		
		[SetUp]
		public void Setup()
		{
			sem = new SemaphoreSlim(5);
			semMax = new SemaphoreSlim(5, 5);
		}	
		
		[Test]
		public void CurrentCountMaxTestCase()
		{
			semMax.Wait();
			semMax.Release(3);
			Assert.AreEqual(5, semMax.CurrentCount);
		}
		
		[Test]
		public void CurrentCountTestCase()
		{
			sem.Wait();
			sem.Wait();
			sem.Release();
			Assert.AreEqual(4, sem.CurrentCount);
		}
		
		[Test]
		public void WaitStressTest()
		{
			int count = -1;
			bool[] array = new bool[7];
			ParallelTestHelper.ParallelStressTest(sem, delegate (SemaphoreSlim s) {
				int index = Interlocked.Increment(ref count);
				s.Wait();
				Thread.Sleep(40);
				s.Release();
				array[index] = true;
			}, 7);
			
			bool result = array.Aggregate((acc, e) => acc && e);
			
			Assert.IsTrue(result, "#1");
			Assert.AreEqual(5, sem.CurrentCount, "#2");
		}
	}
}
#endif