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// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
#if !NO_THREAD
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reactive.Concurrency;
using System.Reactive.Disposables;
using System.Threading;
using Microsoft.Reactive.Testing;
#if NUNIT
using NUnit.Framework;
using TestClassAttribute = NUnit.Framework.TestFixtureAttribute;
using TestMethodAttribute = NUnit.Framework.TestAttribute;
using TestInitializeAttribute = NUnit.Framework.SetUpAttribute;
#else
using Microsoft.VisualStudio.TestTools.UnitTesting;
#endif
namespace ReactiveTests.Tests
{
[TestClass]
public class ThreadPoolSchedulerTest
{
[TestMethod]
public void Schedule_ArgumentChecking()
{
ReactiveAssert.Throws<ArgumentNullException>(() => ThreadPoolScheduler.Instance.Schedule<int>(42, default(Func<IScheduler, int, IDisposable>)));
ReactiveAssert.Throws<ArgumentNullException>(() => ThreadPoolScheduler.Instance.Schedule<int>(42, DateTimeOffset.Now, default(Func<IScheduler, int, IDisposable>)));
ReactiveAssert.Throws<ArgumentNullException>(() => ThreadPoolScheduler.Instance.Schedule<int>(42, TimeSpan.Zero, default(Func<IScheduler, int, IDisposable>)));
}
[TestMethod]
public void Get_Now()
{
var res = ThreadPoolScheduler.Instance.Now - DateTime.Now;
Assert.IsTrue(res.Seconds < 1);
}
[TestMethod]
public void ScheduleAction()
{
var id = Thread.CurrentThread.ManagedThreadId;
var nt = ThreadPoolScheduler.Instance;
var evt = new ManualResetEvent(false);
nt.Schedule(() => { Assert.AreNotEqual(id, Thread.CurrentThread.ManagedThreadId); evt.Set(); });
evt.WaitOne();
}
#if !NO_CDS
[TestMethod]
public void ProperRooting_NoGC_SingleShot()
{
var cts = new CancellationTokenSource();
new Thread(() =>
{
while (!cts.IsCancellationRequested)
{
Thread.Sleep(50);
GC.Collect();
GC.WaitForPendingFinalizers();
}
}).Start();
var tp = ThreadPoolScheduler.Instance;
var N = 100;
var cd = new CountdownEvent(N);
for (int i = 0; i < N; i++)
{
tp.Schedule(TimeSpan.FromMilliseconds(100 + i), () => { cd.Signal(); });
}
Assert.IsTrue(cd.Wait(TimeSpan.FromMinutes(1)));
cts.Cancel();
}
[TestMethod]
public void ProperRooting_NoGC_Periodic()
{
var cts = new CancellationTokenSource();
new Thread(() =>
{
while (!cts.IsCancellationRequested)
{
Thread.Sleep(50);
GC.Collect();
GC.WaitForPendingFinalizers();
}
}).Start();
var tp = ThreadPoolScheduler.Instance;
var N = 5;
var e = new ManualResetEvent(false);
var n = 0;
var d = tp.SchedulePeriodic(TimeSpan.FromMilliseconds(80), () => { if (Interlocked.Increment(ref n) == N) e.Set(); });
Assert.IsTrue(e.WaitOne(TimeSpan.FromMinutes(1)));
d.Dispose();
cts.Cancel();
}
#endif
#if !SILVERLIGHT
[TestMethod]
public void ScheduleActionDueRelative()
{
var id = Thread.CurrentThread.ManagedThreadId;
var nt = ThreadPoolScheduler.Instance;
var evt = new ManualResetEvent(false);
nt.Schedule(TimeSpan.FromSeconds(0.2), () => { Assert.AreNotEqual(id, Thread.CurrentThread.ManagedThreadId); evt.Set(); });
evt.WaitOne();
}
[TestMethod]
public void ScheduleActionDue0()
{
var id = Thread.CurrentThread.ManagedThreadId;
var nt = ThreadPoolScheduler.Instance;
var evt = new ManualResetEvent(false);
nt.Schedule(TimeSpan.FromTicks(0), () => { Assert.AreNotEqual(id, Thread.CurrentThread.ManagedThreadId); evt.Set(); });
evt.WaitOne();
}
[TestMethod]
public void ScheduleActionDueAbsolute()
{
var id = Thread.CurrentThread.ManagedThreadId;
var nt = ThreadPoolScheduler.Instance;
var evt = new ManualResetEvent(false);
nt.Schedule(DateTimeOffset.UtcNow + TimeSpan.FromSeconds(0.2), () => { Assert.AreNotEqual(id, Thread.CurrentThread.ManagedThreadId); evt.Set(); });
evt.WaitOne();
}
#endif
[TestMethod]
public void ScheduleActionCancel()
{
var id = Thread.CurrentThread.ManagedThreadId;
var nt = ThreadPoolScheduler.Instance;
var set = false;
var d = nt.Schedule(TimeSpan.FromSeconds(0.2), () => { Assert.Fail(); set = true; });
d.Dispose();
Thread.Sleep(400);
Assert.IsFalse(set);
}
#if !NO_PERF
[TestMethod]
public void ScheduleLongRunning_ArgumentChecking()
{
ReactiveAssert.Throws<ArgumentNullException>(() => ThreadPoolScheduler.Instance.ScheduleLongRunning<int>(42, default(Action<int, ICancelable>)));
}
[TestMethod]
public void ScheduleLongRunning()
{
var id = Thread.CurrentThread.ManagedThreadId;
var nt = ThreadPoolScheduler.Instance;
var evt = new ManualResetEvent(false);
nt.ScheduleLongRunning(42, (x, cancel) => { Assert.AreNotEqual(id, Thread.CurrentThread.ManagedThreadId); evt.Set(); });
evt.WaitOne();
}
[TestMethod]
public void ScheduleLongRunningCancel()
{
var nt = ThreadPoolScheduler.Instance;
var started = new ManualResetEvent(false);
var stopped = new ManualResetEvent(false);
var n = 0;
var d = nt.ScheduleLongRunning(42, (x, cancel) =>
{
for (n = 0; !cancel.IsDisposed; n++)
{
if (n == 10)
started.Set();
}
stopped.Set();
});
started.WaitOne();
d.Dispose();
stopped.WaitOne();
Assert.IsTrue(n >= 10);
}
#if !NO_STOPWATCH
[TestMethod]
public void Stopwatch()
{
var nt = ThreadPoolScheduler.Instance;
var sw = nt.StartStopwatch();
var s0 = sw.Elapsed.Ticks;
Thread.Sleep(10);
var s1 = sw.Elapsed.Ticks;
Assert.IsTrue(s1 > s0);
}
#endif
[TestMethod]
public void Periodic_ArgumentChecking()
{
ReactiveAssert.Throws<ArgumentNullException>(() => ThreadPoolScheduler.Instance.SchedulePeriodic(0, TimeSpan.FromSeconds(1), null));
ReactiveAssert.Throws<ArgumentOutOfRangeException>(() => ThreadPoolScheduler.Instance.SchedulePeriodic(0, TimeSpan.Zero, _ => _));
ReactiveAssert.Throws<ArgumentOutOfRangeException>(() => ThreadPoolScheduler.Instance.SchedulePeriodic(0, TimeSpan.FromSeconds(-1), _ => _));
}
[TestMethod]
public void Periodic_Regular()
{
var gate = new object();
var n = 0;
var e = new ManualResetEvent(false);
var lst = new List<int>();
var d = ThreadPoolScheduler.Instance.SchedulePeriodic(0, TimeSpan.FromMilliseconds(25), x =>
{
lock (gate)
{
if (n++ == 10)
e.Set();
}
lst.Add(x);
return x + 1;
});
e.WaitOne();
d.Dispose();
var m = default(int);
var k = default(int);
var i = 0;
do
{
lock (gate)
m = n;
Thread.Sleep(50);
lock (gate)
k = n;
} while (m != k && i++ < 10); // Wait for Dispose to reach the timer; should be almost instantaneous due to nop'ing out of the action.
Assert.AreNotEqual(10, i);
var res = lst.ToArray();
Assert.IsTrue(res.Length >= 10);
Assert.IsTrue(res.Take(10).SequenceEqual(Enumerable.Range(0, 10)));
}
[TestMethod]
public void Periodic_NonReentrant()
{
var n = 0;
var fail = false;
var d = ThreadPoolScheduler.Instance.SchedulePeriodic(0, TimeSpan.FromMilliseconds(50), x =>
{
try
{
if (Interlocked.Increment(ref n) > 1) // Without an AsyncLock this would fail.
fail = true;
Thread.Sleep(100);
return x + 1;
}
finally
{
Interlocked.Decrement(ref n);
}
});
Thread.Sleep(500);
d.Dispose();
Assert.IsFalse(fail);
}
#endif
#if DESKTOPCLR
[TestMethod]
public void No_ThreadPool_Starvation_Dispose()
{
var bwt = default(int);
var bio = default(int);
ThreadPool.GetAvailableThreads(out bwt, out bio);
var N = Environment.ProcessorCount * 2;
for (int i = 0; i < N; i++)
{
var e = new ManualResetEvent(false);
var f = new ManualResetEvent(false);
var d = ThreadPoolScheduler.Instance.Schedule(TimeSpan.FromMilliseconds(1), () => { e.Set(); f.WaitOne(); });
e.WaitOne();
d.Dispose();
f.Set();
}
var ewt = default(int);
var eio = default(int);
ThreadPool.GetAvailableThreads(out ewt, out eio);
Assert.IsFalse(bwt - ewt >= N);
}
#endif
}
}
#endif
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