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//
// TaskCompletionSourceTests.cs
//
// Author:
// Jérémie "Garuma" Laval <jeremie.laval@gmail.com>
//
// Copyright (c) 2009 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.Threading;
using System.Threading.Tasks;
using NUnit.Framework;
namespace MonoTests.System.Threading.Tasks
{
[TestFixture]
public class TaskCompletionSourceTests
{
TaskCompletionSource<int> completionSource;
object state;
[SetUp]
public void Setup ()
{
state = new object ();
completionSource = new TaskCompletionSource<int> (state, TaskCreationOptions.None);
}
[Test]
public void CreationCheckTest ()
{
Assert.IsNotNull (completionSource.Task, "#1");
Assert.AreEqual (TaskCreationOptions.None, completionSource.Task.CreationOptions, "#2");
}
[Test]
public void CtorInvalidOptions ()
{
try {
new TaskCompletionSource<long> (TaskCreationOptions.LongRunning);
Assert.Fail ("#1");
} catch (ArgumentOutOfRangeException) {
}
try {
new TaskCompletionSource<long> (TaskCreationOptions.PreferFairness);
Assert.Fail ("#2");
} catch (ArgumentOutOfRangeException) {
}
}
[Test]
public void SetResultTest ()
{
Assert.IsNotNull (completionSource.Task, "#1");
Assert.IsTrue (completionSource.TrySetResult (42), "#2");
Assert.AreEqual (TaskStatus.RanToCompletion, completionSource.Task.Status, "#3");
Assert.AreEqual (42, completionSource.Task.Result, "#4");
Assert.IsFalse (completionSource.TrySetResult (43), "#5");
Assert.AreEqual (TaskStatus.RanToCompletion, completionSource.Task.Status, "#6");
Assert.AreEqual (42, completionSource.Task.Result, "#7");
Assert.IsFalse (completionSource.TrySetCanceled (), "#8");
Assert.AreEqual (TaskStatus.RanToCompletion, completionSource.Task.Status, "#9");
}
[Test]
public void SetCanceledTest ()
{
Assert.IsNotNull (completionSource.Task, "#1");
Assert.IsTrue (completionSource.TrySetCanceled (), "#2");
Assert.AreEqual (TaskStatus.Canceled, completionSource.Task.Status, "#3");
Assert.IsFalse (completionSource.TrySetResult (42), "#4");
Assert.AreEqual (TaskStatus.Canceled, completionSource.Task.Status, "#5");
try {
Console.WriteLine (completionSource.Task.Result);
Assert.Fail ("#6");
} catch (AggregateException e) {
var details = (TaskCanceledException) e.InnerException;
Assert.AreEqual (completionSource.Task, details.Task, "#6e");
Assert.IsNull (details.Task.Exception, "#6e2");
}
}
[Test]
public void SetExceptionTest ()
{
Exception e = new Exception ("foo");
Assert.IsNotNull (completionSource.Task, "#1");
Assert.IsTrue (completionSource.TrySetException (e), "#2");
Assert.AreEqual (TaskStatus.Faulted, completionSource.Task.Status, "#3");
Assert.That (completionSource.Task.Exception, Is.TypeOf(typeof (AggregateException)), "#4.1");
AggregateException aggr = (AggregateException)completionSource.Task.Exception;
Assert.AreEqual (1, aggr.InnerExceptions.Count, "#4.2");
Assert.AreEqual (e, aggr.InnerExceptions[0], "#4.3");
Assert.IsFalse (completionSource.TrySetResult (42), "#5");
Assert.AreEqual (TaskStatus.Faulted, completionSource.Task.Status, "#6");
Assert.IsFalse (completionSource.TrySetCanceled (), "#8");
Assert.AreEqual (TaskStatus.Faulted, completionSource.Task.Status, "#9");
}
[Test]
public void SetExceptionInvalid ()
{
try {
completionSource.TrySetException (new ApplicationException[0]);
Assert.Fail ("#1");
} catch (ArgumentException) {
}
try {
completionSource.TrySetException (new [] { new ApplicationException (), null });
Assert.Fail ("#2");
} catch (ArgumentException) {
}
Assert.AreEqual (TaskStatus.WaitingForActivation, completionSource.Task.Status, "r1");
}
[Test, ExpectedException (typeof (InvalidOperationException))]
public void SetResultExceptionTest ()
{
Assert.IsNotNull (completionSource.Task, "#1");
Assert.IsTrue (completionSource.TrySetResult (42), "#2");
Assert.AreEqual (TaskStatus.RanToCompletion, completionSource.Task.Status, "#3");
Assert.AreEqual (42, completionSource.Task.Result, "#4");
completionSource.SetResult (43);
}
[Test]
[Category ("MultiThreaded")]
public void ContinuationTest ()
{
bool result = false;
var t = completionSource.Task.ContinueWith ((p) => { if (p.Result == 2) result = true; });
Assert.AreEqual (TaskStatus.WaitingForActivation, completionSource.Task.Status, "#A");
completionSource.SetResult (2);
t.Wait ();
Assert.AreEqual (TaskStatus.RanToCompletion, completionSource.Task.Status, "#1");
Assert.AreEqual (TaskStatus.RanToCompletion, t.Status, "#2");
Assert.IsTrue (result);
}
[Test]
public void FaultedFutureTest ()
{
var thrown = new ApplicationException ();
var source = new TaskCompletionSource<int> ();
source.TrySetException (thrown);
var f = source.Task;
AggregateException ex = null;
try {
f.Wait ();
} catch (AggregateException e) {
ex = e;
}
Assert.IsNotNull (ex);
Assert.AreEqual (thrown, ex.InnerException);
Assert.AreEqual (thrown, f.Exception.InnerException);
Assert.AreEqual (TaskStatus.Faulted, f.Status);
ex = null;
try {
var result = f.Result;
} catch (AggregateException e) {
ex = e;
}
Assert.IsNotNull (ex);
Assert.AreEqual (TaskStatus.Faulted, f.Status);
Assert.AreEqual (thrown, f.Exception.InnerException);
Assert.AreEqual (thrown, ex.InnerException);
}
[Test]
[Ignore ("#4550, Mono GC is lame")]
[Category ("MultiThreaded")]
public void SetExceptionAndUnobservedEvent ()
{
bool notFromMainThread = false;
var mre = new ManualResetEvent (false);
int mainThreadId = Thread.CurrentThread.ManagedThreadId;
TaskScheduler.UnobservedTaskException += (o, args) => {
notFromMainThread = Thread.CurrentThread.ManagedThreadId != mainThreadId;
args.SetObserved ();
mre.Set ();
};
var inner = new ApplicationException ();
CreateFaultedTaskCompletionSource (inner);
GC.Collect ();
GC.WaitForPendingFinalizers ();
Assert.IsTrue (mre.WaitOne (5000), "#1");
Assert.IsTrue (notFromMainThread, "#2");
}
void CreateFaultedTaskCompletionSource (Exception inner)
{
var tcs = new TaskCompletionSource<int> ();
tcs.SetException (inner);
tcs = null;
}
[Test]
[Category ("MultiThreaded")]
public void WaitingTest ()
{
var tcs = new TaskCompletionSource<int> ();
var task = tcs.Task;
bool result = task.Wait (50);
Assert.IsFalse (result);
}
}
}
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