mcs/class/corlib/Test/System.Threading.Tasks/TaskTest.cs

   1 //
   2 // TaskTest.cs
   3 //
   4 // Authors:
   5 //      Marek Safar  <marek.safar@gmail.com>
   6 //
   7 // Copyright (c) 2008 Jérémie "Garuma" Laval
   8 // Copyright (C) 2011 Xamarin Inc (http://www.xamarin.com)
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining a copy
  11 // of this software and associated documentation files (the "Software"), to deal
  12 // in the Software without restriction, including without limitation the rights
  13 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  14 // copies of the Software, and to permit persons to whom the Software is
  15 // furnished to do so, subject to the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be included in
  18 // all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  23 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  24 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  25 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  26 // THE SOFTWARE.
  27 //
  28 //
  29
  30 #if NET_4_0
  31
  32 using System;
  33 using System.Threading;
  34 using System.Threading.Tasks;
  35 using System.Collections.Generic;
  36 using NUnit.Framework;
  37
  38 #if !MOBILE
  39 using NUnit.Framework.SyntaxHelpers;
  40 #endif
  41
  42 namespace MonoTests.System.Threading.Tasks
  43 {
  44         [TestFixture]
  45         public class TaskTests
  46         {
  47                 class MockScheduler : TaskScheduler
  48                 {
  49                         public event Action<Task, bool> TryExecuteTaskInlineHandler;
  50
  51                         protected override IEnumerable<Task> GetScheduledTasks ()
  52                         {
  53                                 throw new NotImplementedException ();
  54                         }
  55
  56                         protected override void QueueTask (Task task)
  57                         {
  58                                 return;
  59                         }
  60
  61                         protected override bool TryExecuteTaskInline (Task task, bool taskWasPreviouslyQueued)
  62                         {
  63                                 if (TryExecuteTaskInlineHandler != null)
  64                                         TryExecuteTaskInlineHandler (task, taskWasPreviouslyQueued);
  65
  66                                 return base.TryExecuteTask (task);
  67                         }
  68                 }
  69
  70                 class NonInlineableScheduler : TaskScheduler
  71                 {
  72                         protected override IEnumerable<Task> GetScheduledTasks ()
  73                         {
  74                                 throw new NotImplementedException ();
  75                         }
  76
  77                         protected override void QueueTask (Task task)
  78                         {
  79                                 if (!base.TryExecuteTask (task))
  80                                         throw new ApplicationException ();
  81                         }
  82
  83                         protected override bool TryExecuteTaskInline (Task task, bool taskWasPreviouslyQueued)
  84                         {
  85                                 return false;
  86                         }
  87                 }
  88
  89
  90                 Task[] tasks;
  91                 const int max = 6;
  92
  93                 [SetUp]
  94                 public void Setup()
  95                 {
  96                         tasks = new Task[max];
  97                 }
  98
  99                 void InitWithDelegate(Action action)
 100                 {
 101                         for (int i = 0; i < max; i++) {
 102                                 tasks[i] = Task.Factory.StartNew(action);
 103                         }
 104                 }
 105
 106                 [Test]
 107                 public void WaitAnyTest()
 108                 {
 109                         ParallelTestHelper.Repeat (delegate {
 110                                 int flag = 0;
 111                                 int finished = 0;
 112
 113                                 InitWithDelegate(delegate {
 114                                         int times = Interlocked.Exchange (ref flag, 1);
 115                                         if (times == 1) {
 116                                                 SpinWait sw = new SpinWait ();
 117                                                 while (finished == 0) sw.SpinOnce ();
 118                                         } else {
 119                                                 Interlocked.Increment (ref finished);
 120                                         }
 121                                 });
 122
 123                                 int index = Task.WaitAny(tasks, 1000);
 124
 125                                 Assert.AreNotEqual (-1, index, "#3");
 126                                 Assert.AreEqual (1, flag, "#1");
 127                                 Assert.AreEqual (1, finished, "#2");
 128                         });
 129                 }
 130
 131                 [Test]
 132                 public void WaitAny_Empty ()
 133                 {
 134                         Assert.AreEqual (-1, Task.WaitAny (new Task[0]));
 135                 }
 136
 137                 [Test]
 138                 public void WaitAny_Zero ()
 139                 {
 140                         Assert.AreEqual (-1, Task.WaitAny (new[] { new Task (delegate { })}, 0), "#1");
 141                         Assert.AreEqual (-1, Task.WaitAny (new[] { new Task (delegate { }) }, 20), "#1");
 142                 }
 143
 144                 [Test]
 145                 public void WaitAny_Cancelled ()
 146                 {
 147                         var cancelation = new CancellationTokenSource ();
 148                         var tasks = new Task[] {
 149                                 new Task (delegate { }),
 150                                 new Task (delegate { }, cancelation.Token)
 151                         };
 152
 153                         cancelation.Cancel ();
 154
 155                         Assert.AreEqual (1, Task.WaitAny (tasks, 1000), "#1");
 156                         Assert.IsTrue (tasks[1].IsCompleted, "#2");
 157                         Assert.IsTrue (tasks[1].IsCanceled, "#3");
 158                 }
 159
 160                 [Test]
 161                 public void WaitAny_CancelledWithoutExecution ()
 162                 {
 163                         var cancelation = new CancellationTokenSource ();
 164                         var tasks = new Task[] {
 165                                 new Task (delegate { }),
 166                                 new Task (delegate { })
 167                         };
 168
 169                         int res = 0;
 170                         var mre = new ManualResetEventSlim (false);
 171                         ThreadPool.QueueUserWorkItem (delegate {
 172                                 res = Task.WaitAny (tasks, 20);
 173                                 mre.Set ();
 174                         });
 175
 176                         cancelation.Cancel ();
 177                         Assert.IsTrue (mre.Wait (1000), "#1");
 178                         Assert.AreEqual (-1, res);
 179                 }
 180
 181                 [Test]
 182                 public void WaitAny_OneException ()
 183                 {
 184                         var mre = new ManualResetEventSlim (false);
 185                         var tasks = new Task[] {
 186                                 Task.Factory.StartNew (delegate { mre.Wait (1000); }),
 187                                 Task.Factory.StartNew (delegate { throw new ApplicationException (); })
 188                         };
 189
 190                         Assert.AreEqual (1, Task.WaitAny (tasks, 1000), "#1");
 191                         Assert.IsFalse (tasks[0].IsCompleted, "#2");
 192                         Assert.IsTrue (tasks[1].IsFaulted, "#3");
 193
 194                         mre.Set ();
 195                 }
 196
 197                 [Test]
 198                 public void WaitAny_SingleCanceled ()
 199                 {
 200                         var src = new CancellationTokenSource ();
 201                         var t = Task.Factory.StartNew (() => { Thread.Sleep (200); src.Cancel (); src.Token.ThrowIfCancellationRequested (); }, src.Token);
 202                         Assert.AreEqual (0, Task.WaitAny (new [] { t }));
 203                 }
 204
 205                 public void WaitAny_ManyExceptions ()
 206                 {
 207                         CountdownEvent cde = new CountdownEvent (3);
 208                         var tasks = new [] {
 209                                 Task.Factory.StartNew (delegate { try { throw new ApplicationException (); } finally { cde.Signal (); } }),
 210                                 Task.Factory.StartNew (delegate { try { throw new ApplicationException (); } finally { cde.Signal (); } }),
 211                                 Task.Factory.StartNew (delegate { try { throw new ApplicationException (); } finally { cde.Signal (); } })
 212                         };
 213
 214                         Assert.IsTrue (cde.Wait (1000), "#1");
 215
 216                         try {
 217                                 Assert.IsTrue (Task.WaitAll (tasks, 1000), "#2");
 218                         } catch (AggregateException e) {
 219                                 Assert.AreEqual (3, e.InnerExceptions.Count, "#3");
 220                         }
 221                 }
 222
 223                 [Test]
 224                 public void WaitAny_ManyCanceled ()
 225                 {
 226                         var cancellation = new CancellationToken (true);
 227                         var tasks = new[] {
 228                                 Task.Factory.StartNew (delegate { }, cancellation),
 229                                 Task.Factory.StartNew (delegate { }, cancellation),
 230                                 Task.Factory.StartNew (delegate { }, cancellation)
 231                         };
 232
 233                         try {
 234                                 Assert.IsTrue (Task.WaitAll (tasks, 1000), "#1");
 235                         } catch (AggregateException e) {
 236                                 Assert.AreEqual (3, e.InnerExceptions.Count, "#2");
 237                         }
 238                 }
 239
 240                 [Test]
 241                 public void WaitAllTest ()
 242                 {
 243                         ParallelTestHelper.Repeat (delegate {
 244                                 int achieved = 0;
 245                                 InitWithDelegate(delegate { Interlocked.Increment(ref achieved); });
 246                                 Task.WaitAll(tasks);
 247                                 Assert.AreEqual(max, achieved, "#1");
 248                         });
 249                 }
 250
 251                 [Test]
 252                 public void WaitAll_ManyTasks ()
 253                 {
 254                         for (int r = 0; r < 2000; ++r) {
 255                                 var tasks = new Task[60];
 256
 257                                 for (int i = 0; i < tasks.Length; i++) {
 258                                         tasks[i] = Task.Factory.StartNew (delegate { Thread.Sleep (0); });
 259                                 }
 260
 261                                 Assert.IsTrue (Task.WaitAll (tasks, 2000));
 262                         }
 263                 }
 264
 265                 [Test]
 266                 public void WaitAll_Zero ()
 267                 {
 268                         Assert.IsFalse (Task.WaitAll (new Task[1] { new Task (delegate { }) }, 0), "#0");
 269                         Assert.IsFalse (Task.WaitAll (new Task[1] { new Task (delegate { }) }, 10), "#1");
 270                 }
 271
 272                 [Test]
 273                 public void WaitAll_WithExceptions ()
 274                 {
 275                         InitWithDelegate (delegate { throw new ApplicationException (); });
 276
 277                         try {
 278                                 Task.WaitAll (tasks);
 279                                 Assert.Fail ("#1");
 280                         } catch (AggregateException e) {
 281                                 Assert.AreEqual (6, e.InnerExceptions.Count, "#2");
 282                         }
 283
 284                         Assert.IsNotNull (tasks[0].Exception, "#3");
 285                 }
 286
 287                 [Test]
 288                 public void WaitAll_TimeoutWithExceptionsAfter ()
 289                 {
 290                         CountdownEvent cde = new CountdownEvent (2);
 291                         var mre = new ManualResetEvent (false);
 292                         var tasks = new[] {
 293                                 Task.Factory.StartNew (delegate { mre.WaitOne (); }),
 294                                 Task.Factory.StartNew (delegate { try { throw new ApplicationException (); } finally { cde.Signal (); } }),
 295                                 Task.Factory.StartNew (delegate { try { throw new ApplicationException (); } finally { cde.Signal (); } })
 296                         };
 297
 298                         Assert.IsTrue (cde.Wait (1000), "#1");
 299                         Assert.IsFalse (Task.WaitAll (tasks, 1000), "#2");
 300
 301                         mre.Set ();
 302
 303                         try {
 304                                 Assert.IsTrue (Task.WaitAll (tasks, 1000), "#3");
 305                                 Assert.Fail ("#4");
 306                         } catch (AggregateException e) {
 307                                 Assert.AreEqual (2, e.InnerExceptions.Count, "#5");
 308                         }
 309                 }
 310
 311                 [Test]
 312                 public void WaitAll_TimeoutWithExceptionsBefore ()
 313                 {
 314                         CountdownEvent cde = new CountdownEvent (2);
 315                         var mre = new ManualResetEvent (false);
 316                         var tasks = new[] {
 317                                 Task.Factory.StartNew (delegate { try { throw new ApplicationException (); } finally { cde.Signal (); } }),
 318                                 Task.Factory.StartNew (delegate { try { throw new ApplicationException (); } finally { cde.Signal (); } }),
 319                                 Task.Factory.StartNew (delegate { mre.WaitOne (); })
 320                         };
 321
 322                         Assert.IsTrue (cde.Wait (1000), "#1");
 323                         Assert.IsFalse (Task.WaitAll (tasks, 1000), "#2");
 324
 325                         mre.Set ();
 326
 327                         try {
 328                                 Assert.IsTrue (Task.WaitAll (tasks, 1000), "#3");
 329                                 Assert.Fail ("#4");
 330                         } catch (AggregateException e) {
 331                                 Assert.AreEqual (2, e.InnerExceptions.Count, "#5");
 332                         }
 333                 }
 334
 335                 [Test]
 336                 public void WaitAll_Cancelled ()
 337                 {
 338                         var cancelation = new CancellationTokenSource ();
 339                         var tasks = new Task[] {
 340                                 new Task (delegate { cancelation.Cancel (); }),
 341                                 new Task (delegate { }, cancelation.Token)
 342                         };
 343
 344                         tasks[0].Start ();
 345
 346                         try {
 347                                 Task.WaitAll (tasks);
 348                                 Assert.Fail ("#1");
 349                         } catch (AggregateException e) {
 350                                 var inner = (TaskCanceledException) e.InnerException;
 351                                 Assert.AreEqual (tasks[1], inner.Task, "#2");
 352                         }
 353
 354                         Assert.IsTrue (tasks[0].IsCompleted, "#3");
 355                         Assert.IsTrue (tasks[1].IsCanceled, "#4");
 356                 }
 357
 358 #if NET_4_5
 359                 [Test]
 360                 public void WaitAll_CancelledAndTimeout ()
 361                 {
 362                         var ct = new CancellationToken (true);
 363                         var t1 = new Task (() => {}, ct);
 364                         var t2 = Task.Delay (3000);
 365                         Assert.IsFalse (Task.WaitAll (new[] { t1, t2 }, 10));
 366                 }
 367 #endif
 368
 369                 [Test]
 370                 public void WaitAllExceptionThenCancelled ()
 371                 {
 372                         var cancelation = new CancellationTokenSource ();
 373                         var tasks = new Task[] {
 374                                 new Task (delegate { cancelation.Cancel (); throw new ApplicationException (); }),
 375                                 new Task (delegate { }, cancelation.Token)
 376                         };
 377
 378                         tasks[0].Start ();
 379
 380                         try {
 381                                 Task.WaitAll (tasks);
 382                                 Assert.Fail ("#1");
 383                         } catch (AggregateException e) {
 384                                 Assert.That (e.InnerException, Is.TypeOf (typeof (ApplicationException)), "#2");
 385                                 var inner = (TaskCanceledException) e.InnerExceptions[1];
 386                                 Assert.AreEqual (tasks[1], inner.Task, "#3");
 387                         }
 388
 389                         Assert.IsTrue (tasks[0].IsCompleted, "#4");
 390                         Assert.IsTrue (tasks[1].IsCanceled, "#5");
 391                 }
 392
 393                 [Test]
 394                 public void WaitAll_StartedUnderWait ()
 395                 {
 396                         var task1 = new Task (delegate { });
 397
 398                         ThreadPool.QueueUserWorkItem (delegate {
 399                                 // Sleep little to let task to start and hit internal wait
 400                                 Thread.Sleep (20);
 401                                 task1.Start ();
 402                         });
 403
 404                         Assert.IsTrue (Task.WaitAll (new [] { task1 }, 1000), "#1");
 405                 }
 406
 407                 [Test]
 408                 public void CancelBeforeStart ()
 409                 {
 410                         var src = new CancellationTokenSource ();
 411
 412                         Task t = new Task (delegate { }, src.Token);
 413                         src.Cancel ();
 414                         Assert.AreEqual (TaskStatus.Canceled, t.Status, "#1");
 415
 416                         try {
 417                                 t.Start ();
 418                                 Assert.Fail ("#2");
 419                         } catch (InvalidOperationException) {
 420                         }
 421                 }
 422
 423                 [Test]
 424                 public void Wait_CancelledTask ()
 425                 {
 426                         var src = new CancellationTokenSource ();
 427
 428                         Task t = new Task (delegate { }, src.Token);
 429                         src.Cancel ();
 430
 431                         try {
 432                                 t.Wait (1000);
 433                                 Assert.Fail ("#1");
 434                         } catch (AggregateException e) {
 435                                 var details = (TaskCanceledException) e.InnerException;
 436                                 Assert.AreEqual (t, details.Task, "#1e");
 437                         }
 438
 439                         try {
 440                                 t.Wait ();
 441                                 Assert.Fail ("#2");
 442                         } catch (AggregateException e) {
 443                                 var details = (TaskCanceledException) e.InnerException;
 444                                 Assert.AreEqual (t, details.Task, "#2e");
 445                                 Assert.IsNull (details.Task.Exception, "#2e2");
 446                         }
 447                 }
 448
 449                 [Test]
 450                 public void Wait_Inlined ()
 451                 {
 452                         bool? previouslyQueued = null;
 453
 454                         var scheduler = new MockScheduler ();
 455                         scheduler.TryExecuteTaskInlineHandler += (task, b) => {
 456                                 previouslyQueued = b;
 457                         };
 458
 459                         var tf = new TaskFactory (scheduler);
 460                         var t = tf.StartNew (() => { });
 461                         t.Wait ();
 462
 463                         Assert.AreEqual (true, previouslyQueued);
 464                 }
 465
 466                 [Test, ExpectedException (typeof (InvalidOperationException))]
 467                 public void CreationWhileInitiallyCanceled ()
 468                 {
 469                         var token = new CancellationToken (true);
 470                         var task = new Task (() => { }, token);
 471                         Assert.AreEqual (TaskStatus.Canceled, task.Status);
 472                         task.Start ();
 473                 }
 474
 475                 [Test]
 476                 public void ContinueWithInvalidArguments ()
 477                 {
 478                         var task = new Task (() => { });
 479                         try {
 480                                 task.ContinueWith (null);
 481                                 Assert.Fail ("#1");
 482                         } catch (ArgumentException) {
 483                         }
 484
 485                         try {
 486                                 task.ContinueWith (delegate { }, null);
 487                                 Assert.Fail ("#2");
 488                         } catch (ArgumentException) {
 489                         }
 490
 491                         try {
 492                                 task.ContinueWith (delegate { }, TaskContinuationOptions.OnlyOnCanceled | TaskContinuationOptions.NotOnCanceled);
 493                                 Assert.Fail ("#3");
 494                         } catch (ArgumentException) {
 495                         }
 496
 497                         try {
 498                                 task.ContinueWith (delegate { }, TaskContinuationOptions.OnlyOnRanToCompletion | TaskContinuationOptions.NotOnRanToCompletion);
 499                                 Assert.Fail ("#4");
 500                         } catch (ArgumentException) {
 501                         }
 502                 }
 503
 504                 [Test]
 505                 public void ContinueWithOnAnyTestCase()
 506                 {
 507                         ParallelTestHelper.Repeat (delegate {
 508                                 bool result = false;
 509
 510                                 Task t = Task.Factory.StartNew(delegate { });
 511                                 Task cont = t.ContinueWith(delegate { result = true; }, TaskContinuationOptions.None);
 512                                 Assert.IsTrue (t.Wait (2000), "First wait, (status, {0})", t.Status);
 513                                 Assert.IsTrue (cont.Wait(2000), "Cont wait, (result, {0}) (parent status, {2}) (status, {1})", result, cont.Status, t.Status);
 514                                 Assert.IsNull(cont.Exception, "#1");
 515                                 Assert.IsNotNull(cont, "#2");
 516                                 Assert.IsTrue(result, "#3");
 517                         });
 518                 }
 519
 520                 [Test]
 521                 public void ContinueWithOnCompletedSuccessfullyTestCase()
 522                 {
 523                         ParallelTestHelper.Repeat (delegate {
 524                                 bool result = false;
 525
 526                                 Task t = Task.Factory.StartNew(delegate { });
 527                                 Task cont = t.ContinueWith(delegate { result = true; }, TaskContinuationOptions.OnlyOnRanToCompletion);
 528                                 Assert.IsTrue (t.Wait(1000), "#4");
 529                                 Assert.IsTrue (cont.Wait(1000), "#5");
 530
 531                                 Assert.IsNull(cont.Exception, "#1");
 532                                 Assert.IsNotNull(cont, "#2");
 533                                 Assert.IsTrue(result, "#3");
 534                         });
 535                 }
 536
 537                 [Test]
 538                 public void ContinueWithOnAbortedTestCase()
 539                 {
 540                         bool result = false;
 541                         bool taskResult = false;
 542
 543                         CancellationTokenSource src = new CancellationTokenSource ();
 544                         Task t = new Task (delegate { taskResult = true; }, src.Token);
 545
 546                         Task cont = t.ContinueWith (delegate { result = true; },
 547                                 TaskContinuationOptions.OnlyOnCanceled | TaskContinuationOptions.ExecuteSynchronously);
 548
 549                         src.Cancel ();
 550
 551                         Assert.AreEqual (TaskStatus.Canceled, t.Status, "#1a");
 552                         Assert.IsTrue (cont.IsCompleted, "#1b");
 553                         Assert.IsTrue (result, "#1c");
 554
 555                         try {
 556                                 t.Start ();
 557                                 Assert.Fail ("#2");
 558                         } catch (InvalidOperationException) {
 559                         }
 560
 561                         Assert.IsTrue (cont.Wait (1000), "#3");
 562
 563                         Assert.IsFalse (taskResult, "#4");
 564
 565                         Assert.IsNull (cont.Exception, "#5");
 566                         Assert.AreEqual (TaskStatus.RanToCompletion, cont.Status, "#6");
 567                 }
 568
 569                 [Test]
 570                 public void ContinueWithOnFailedTestCase()
 571                 {
 572                         ParallelTestHelper.Repeat (delegate {
 573                                 bool result = false;
 574
 575                                 Task t = Task.Factory.StartNew(delegate { throw new Exception("foo"); });
 576                                 Task cont = t.ContinueWith(delegate { result = true; }, TaskContinuationOptions.OnlyOnFaulted);
 577
 578                                 Assert.IsTrue (cont.Wait(1000), "#0");
 579                                 Assert.IsNotNull (t.Exception, "#1");
 580                                 Assert.IsNotNull (cont, "#2");
 581                                 Assert.IsTrue (result, "#3");
 582                         });
 583                 }
 584
 585                 [Test]
 586                 public void ContinueWithWithStart ()
 587                 {
 588                         Task t = new Task<int> (() => 1);
 589                         t = t.ContinueWith (l => { });
 590                         try {
 591                                 t.Start ();
 592                                 Assert.Fail ();
 593                         } catch (InvalidOperationException) {
 594                         }
 595                 }
 596
 597                 [Test]
 598                 public void ContinueWithChildren ()
 599                 {
 600                         ParallelTestHelper.Repeat (delegate {
 601                             bool result = false;
 602
 603                             var t = Task.Factory.StartNew (() => Task.Factory.StartNew (() => {}, TaskCreationOptions.AttachedToParent));
 604
 605                                 var mre = new ManualResetEvent (false);
 606                             t.ContinueWith (l => {
 607                                         result = true;
 608                                         mre.Set ();
 609                                 });
 610
 611                                 Assert.IsTrue (mre.WaitOne (1000), "#1");
 612                             Assert.IsTrue (result, "#2");
 613                         }, 2);
 614                 }
 615
 616                 [Test]
 617                 public void ContinueWithDifferentOptionsAreCanceledTest ()
 618                 {
 619                         var mre = new ManualResetEventSlim ();
 620                         var task = Task.Factory.StartNew (() => mre.Wait (200));
 621                         var contFailed = task.ContinueWith (t => {}, TaskContinuationOptions.OnlyOnFaulted);
 622                         var contCanceled = task.ContinueWith (t => {}, TaskContinuationOptions.OnlyOnCanceled);
 623                         var contSuccess = task.ContinueWith (t => {}, TaskContinuationOptions.OnlyOnRanToCompletion);
 624
 625                         mre.Set ();
 626                         contSuccess.Wait (100);
 627
 628                         Assert.IsTrue (contSuccess.IsCompleted);
 629                         Assert.IsTrue (contFailed.IsCompleted);
 630                         Assert.IsTrue (contCanceled.IsCompleted);
 631                         Assert.IsFalse (contSuccess.IsCanceled);
 632                         Assert.IsTrue (contFailed.IsCanceled);
 633                         Assert.IsTrue (contCanceled.IsCanceled);
 634                 }
 635
 636                 [Test]
 637                 public void MultipleTasks()
 638                 {
 639                         ParallelTestHelper.Repeat (delegate {
 640                                 bool r1 = false, r2 = false, r3 = false;
 641
 642                                 Task t1 = Task.Factory.StartNew(delegate {
 643                                         r1 = true;
 644                                 });
 645                                 Task t2 = Task.Factory.StartNew(delegate {
 646                                         r2 = true;
 647                                 });
 648                                 Task t3 = Task.Factory.StartNew(delegate {
 649                                         r3 = true;
 650                                 });
 651
 652                                 t1.Wait(2000);
 653                                 t2.Wait(2000);
 654                                 t3.Wait(2000);
 655
 656                                 Assert.IsTrue(r1, "#1");
 657                                 Assert.IsTrue(r2, "#2");
 658                                 Assert.IsTrue(r3, "#3");
 659                         }, 100);
 660                 }
 661
 662                 [Test]
 663                 public void WaitChildTestCase()
 664                 {
 665                         ParallelTestHelper.Repeat (delegate {
 666                                 bool r1 = false, r2 = false, r3 = false;
 667                                 var mre = new ManualResetEventSlim (false);
 668                                 var mreStart = new ManualResetEventSlim (false);
 669
 670                                 Task t = Task.Factory.StartNew(delegate {
 671                                         Task.Factory.StartNew(delegate {
 672                                                 mre.Wait (300);
 673                                                 r1 = true;
 674                                         }, TaskCreationOptions.AttachedToParent);
 675                                         Task.Factory.StartNew(delegate {
 676                                                 r2 = true;
 677                                         }, TaskCreationOptions.AttachedToParent);
 678                                         Task.Factory.StartNew(delegate {
 679                                                 r3 = true;
 680                                         }, TaskCreationOptions.AttachedToParent);
 681                                         mreStart.Set ();
 682                                 });
 683
 684                                 mreStart.Wait (300);
 685                                 Assert.IsFalse (t.Wait (10), "#0a");
 686                                 mre.Set ();
 687                                 Assert.IsTrue (t.Wait (500), "#0b");
 688                                 Assert.IsTrue(r2, "#1");
 689                                 Assert.IsTrue(r3, "#2");
 690                                 Assert.IsTrue(r1, "#3");
 691                                 Assert.AreEqual (TaskStatus.RanToCompletion, t.Status, "#4");
 692                         }, 10);
 693                 }
 694
 695                 Task parent_wfc;
 696
 697                 [Test]
 698                 public void WaitingForChildrenToComplete ()
 699                 {
 700                         Task nested = null;
 701                         var mre = new ManualResetEvent (false);
 702
 703                         parent_wfc = Task.Factory.StartNew (() => {
 704                                 nested = Task.Factory.StartNew (() => {
 705                                         Assert.IsTrue (mre.WaitOne (4000), "parent_wfc needs to be set first");
 706                                         Assert.IsFalse (parent_wfc.Wait (10), "#1a");
 707                                         Assert.AreEqual (TaskStatus.WaitingForChildrenToComplete, parent_wfc.Status, "#1b");
 708                                 }, TaskCreationOptions.AttachedToParent).ContinueWith (l => {
 709                                         Assert.IsTrue (parent_wfc.Wait (2000), "#2a");
 710                                         Assert.AreEqual (TaskStatus.RanToCompletion, parent_wfc.Status, "#2b");
 711                                 }, TaskContinuationOptions.ExecuteSynchronously);
 712                         });
 713
 714                         mre.Set ();
 715                         Assert.IsTrue (parent_wfc.Wait (2000), "#3");
 716                         Assert.IsTrue (nested.Wait (2000), "#4");
 717                 }
 718
 719                 [Test]
 720                 public void WaitChildWithContinuationAttachedTest ()
 721                 {
 722                         bool result = false;
 723                         var task = new Task(() =>
 724                         {
 725                                 Task.Factory.StartNew(() =>     {
 726                                         Thread.Sleep (200);
 727                                 }, TaskCreationOptions.AttachedToParent).ContinueWith(t => {
 728                                         Thread.Sleep (200);
 729                                         result = true;
 730                                 }, TaskContinuationOptions.AttachedToParent);
 731                         });
 732                         task.Start();
 733                         task.Wait();
 734                         Assert.IsTrue (result);
 735                 }
 736
 737                 [Test]
 738                 public void WaitChildWithContinuationNotAttachedTest ()
 739                 {
 740                         var task = new Task(() =>
 741                         {
 742                                 Task.Factory.StartNew(() =>     {
 743                                         Thread.Sleep (200);
 744                                 }, TaskCreationOptions.AttachedToParent).ContinueWith(t => {
 745                                         Thread.Sleep (3000);
 746                                 });
 747                         });
 748                         task.Start();
 749                         Assert.IsTrue (task.Wait(400));
 750                 }
 751
 752                 [Test]
 753                 public void WaitChildWithNesting ()
 754                 {
 755                         var result = false;
 756                         var t = Task.Factory.StartNew (() => {
 757                                 Task.Factory.StartNew (() => {
 758                                         Task.Factory.StartNew (() => {
 759                                                 Thread.Sleep (500);
 760                                                 result = true;
 761                                         }, TaskCreationOptions.AttachedToParent);
 762                                 }, TaskCreationOptions.AttachedToParent);
 763                         });
 764                         t.Wait ();
 765                         Assert.IsTrue (result);
 766                 }
 767
 768                 [Test]
 769                 public void DoubleWaitTest ()
 770                 {
 771                         ParallelTestHelper.Repeat (delegate {
 772                                 var evt = new ManualResetEventSlim ();
 773                                 var t = Task.Factory.StartNew (() => evt.Wait (5000));
 774                                 var cntd = new CountdownEvent (2);
 775                                 var cntd2 = new CountdownEvent (2);
 776
 777                                 bool r1 = false, r2 = false;
 778                                 ThreadPool.QueueUserWorkItem (delegate { cntd.Signal (); r1 = t.Wait (1000) && t.Result; cntd2.Signal (); });
 779                                 ThreadPool.QueueUserWorkItem (delegate { cntd.Signal (); r2 = t.Wait (1000) && t.Result; cntd2.Signal (); });
 780
 781                                 Assert.IsTrue (cntd.Wait (2000), "#1");
 782                                 evt.Set ();
 783                                 Assert.IsTrue (cntd2.Wait (2000), "#2");
 784                                 Assert.IsTrue (r1, "r1");
 785                                 Assert.IsTrue (r2, "r2");
 786                         }, 10);
 787                 }
 788
 789                 [Test]
 790                 public void DoubleTimeoutedWaitTest ()
 791                 {
 792                         var evt = new ManualResetEventSlim ();
 793                         var t = new Task (delegate { });
 794                         var cntd = new CountdownEvent (2);
 795
 796                         bool r1 = false, r2 = false;
 797                         ThreadPool.QueueUserWorkItem (delegate { r1 = !t.Wait (100); cntd.Signal (); });
 798                         ThreadPool.QueueUserWorkItem (delegate { r2 = !t.Wait (100); cntd.Signal (); });
 799
 800                         cntd.Wait (2000);
 801                         Assert.IsTrue (r1);
 802                         Assert.IsTrue (r2);
 803                 }
 804
 805                 [Test]
 806                 public void RunSynchronously ()
 807                 {
 808                         var val = 0;
 809                         Task t = new Task (() => { Thread.Sleep (100); val = 1; });
 810                         t.RunSynchronously ();
 811
 812                         Assert.AreEqual (1, val, "#1");
 813
 814                         t = new Task (() => { Thread.Sleep (0); val = 2; });
 815
 816                         bool? previouslyQueued = null;
 817
 818                         var scheduler = new MockScheduler ();
 819                         scheduler.TryExecuteTaskInlineHandler += (task, b) => {
 820                                 previouslyQueued = b;
 821                         };
 822
 823                         t.RunSynchronously (scheduler);
 824
 825                         Assert.AreEqual (2, val, "#2");
 826                         Assert.AreEqual (false, previouslyQueued, "#2a");
 827                 }
 828
 829                 [Test]
 830                 public void RunSynchronouslyArgumentChecks ()
 831                 {
 832                         Task t = new Task (() => { });
 833                         try {
 834                                 t.RunSynchronously (null);
 835                                 Assert.Fail ("#1");
 836                         } catch (ArgumentNullException) {
 837                         }
 838                 }
 839
 840                 [Test]
 841                 public void RunSynchronouslyWithAttachedChildren ()
 842                 {
 843                         var result = false;
 844                         var t = new Task (() => {
 845                                 Task.Factory.StartNew (() => { Thread.Sleep (500); result = true; }, TaskCreationOptions.AttachedToParent);
 846                         });
 847                         t.RunSynchronously ();
 848                         Assert.IsTrue (result);
 849                 }
 850
 851                 [Test]
 852                 public void RunSynchronouslyOnContinuation ()
 853                 {
 854                         Task t = new Task<int> (() => 1);
 855                         t = t.ContinueWith (l => { });
 856                         try {
 857                                 t.RunSynchronously ();
 858                                 Assert.Fail ("#1");
 859                         } catch (InvalidOperationException) {
 860                         }
 861                 }
 862
 863                 [Test]
 864                 public void UnobservedExceptionOnFinalizerThreadTest ()
 865                 {
 866                         bool wasCalled = false;
 867                         TaskScheduler.UnobservedTaskException += (o, args) => {
 868                                 wasCalled = true;
 869                                 args.SetObserved ();
 870                         };
 871                         var inner = new ApplicationException ();
 872                         Task.Factory.StartNew (() => { throw inner; });
 873                         Thread.Sleep (1000);
 874                         GC.Collect ();
 875                         Thread.Sleep (1000);
 876                         GC.WaitForPendingFinalizers ();
 877
 878                         Assert.IsTrue (wasCalled);
 879                 }
 880
 881                 [Test, ExpectedException (typeof (InvalidOperationException))]
 882                 public void StartFinishedTaskTest ()
 883                 {
 884                         var t = Task.Factory.StartNew (delegate () { });
 885                         t.Wait ();
 886
 887                         t.Start ();
 888                 }
 889
 890                 [Test]
 891                 public void Start_NullArgument ()
 892                 {
 893                         var t = Task.Factory.StartNew (delegate () { });
 894                         try {
 895                                 t.Start (null);
 896                                 Assert.Fail ();
 897                         } catch (ArgumentNullException) {
 898                         }
 899                 }
 900
 901                 [Test, ExpectedException (typeof (InvalidOperationException))]
 902                 public void DisposeUnstartedTest ()
 903                 {
 904                         var t = new Task (() => { });
 905                         t.Dispose ();
 906                 }
 907
 908                 [Test]
 909                 public void ThrowingUnrelatedCanceledExceptionTest ()
 910                 {
 911                         Task t = new Task (() => {
 912                                 throw new TaskCanceledException ();
 913                         });
 914
 915                         t.RunSynchronously ();
 916                         Assert.IsTrue (t.IsFaulted);
 917                         Assert.IsFalse (t.IsCanceled);
 918                 }
 919
 920                 [Test]
 921                 public void CanceledContinuationExecuteSynchronouslyTest ()
 922                 {
 923                         var source = new CancellationTokenSource();
 924                         var token = source.Token;
 925                         var evt = new ManualResetEventSlim ();
 926                         bool result = false;
 927                         bool thrown = false;
 928
 929                         var task = Task.Factory.StartNew (() => evt.Wait (100));
 930                         var cont = task.ContinueWith (t => result = true, token, TaskContinuationOptions.ExecuteSynchronously, TaskScheduler.Default);
 931
 932                         source.Cancel();
 933                         evt.Set ();
 934                         task.Wait (100);
 935                         try {
 936                                 cont.Wait (100);
 937                         } catch (Exception ex) {
 938                                 thrown = true;
 939                         }
 940
 941                         Assert.IsTrue (task.IsCompleted);
 942                         Assert.IsTrue (cont.IsCanceled);
 943                         Assert.IsFalse (result);
 944                         Assert.IsTrue (thrown);
 945                 }
 946
 947                 [Test]
 948                 public void WhenChildTaskErrorIsThrownParentTaskShouldBeFaulted ()
 949                 {
 950                         Task innerTask = null;
 951                         var testTask = new Task (() =>
 952                         {
 953                                 innerTask = new Task (() =>
 954                                 {
 955                                         throw new InvalidOperationException ();
 956                                 }, TaskCreationOptions.AttachedToParent);
 957                                 innerTask.RunSynchronously ();
 958                         });
 959                         testTask.RunSynchronously ();
 960
 961                         Assert.AreNotEqual (TaskStatus.Running, testTask.Status);
 962                         Assert.IsNotNull (innerTask);
 963                         Assert.IsTrue (innerTask.IsFaulted);
 964                         Assert.IsNotNull (testTask.Exception);
 965                         Assert.IsTrue (testTask.IsFaulted);
 966                         Assert.IsNotNull (innerTask.Exception);
 967                 }
 968
 969                 [Test]
 970                 public void WhenChildTaskErrorIsThrownOnlyOnFaultedContinuationShouldExecute ()
 971                 {
 972                         var continuationRan = false;
 973                         var testTask = new Task (() =>
 974                         {
 975                                 var task = new Task (() =>
 976                                 {
 977                                         throw new InvalidOperationException();
 978                                 }, TaskCreationOptions.AttachedToParent);
 979                                 task.RunSynchronously ();
 980                         });
 981                         var onErrorTask = testTask.ContinueWith (x => continuationRan = true, TaskContinuationOptions.OnlyOnFaulted);
 982                         testTask.RunSynchronously ();
 983                         onErrorTask.Wait (100);
 984                         Assert.IsTrue (continuationRan);
 985                 }
 986
 987                 [Test]
 988                 public void WhenChildTaskErrorIsThrownNotOnFaultedContinuationShouldNotBeExecuted ()
 989                 {
 990                         var continuationRan = false;
 991                         var testTask = new Task (() =>
 992                         {
 993                                 var task = new Task (() =>
 994                                 {
 995                                         throw new InvalidOperationException();
 996                                 }, TaskCreationOptions.AttachedToParent);
 997                                 task.RunSynchronously();
 998                         });
 999                         var onErrorTask = testTask.ContinueWith (x => continuationRan = true, TaskContinuationOptions.NotOnFaulted);
1000                         testTask.RunSynchronously ();
1001                         Assert.IsTrue (onErrorTask.IsCompleted);
1002                         Assert.IsFalse (onErrorTask.IsFaulted);
1003                         Assert.IsFalse (continuationRan);
1004                 }
1005
1006                 [Test]
1007                 public void WhenChildTaskSeveralLevelsDeepHandlesAggregateExceptionErrorStillBubblesToParent ()
1008                 {
1009                         var continuationRan = false;
1010                         AggregateException e = null;
1011                         var testTask = new Task (() =>
1012                         {
1013                                 var child1 = new Task (() =>
1014                                 {
1015                                         var child2 = new Task (() =>
1016                                         {
1017                                                 throw new InvalidOperationException();
1018                                         }, TaskCreationOptions.AttachedToParent);
1019                                         child2.RunSynchronously ();
1020                                 }, TaskCreationOptions.AttachedToParent);
1021
1022                                 child1.RunSynchronously();
1023                                 e = child1.Exception;
1024                                 child1.Exception.Handle (ex => true);
1025                         });
1026                         var onErrorTask = testTask.ContinueWith (x => continuationRan = true, TaskContinuationOptions.OnlyOnFaulted);
1027                         testTask.RunSynchronously ();
1028                         onErrorTask.Wait (100);
1029                         Assert.IsNotNull (e);
1030                         Assert.IsTrue (continuationRan);
1031                 }
1032
1033                 [Test]
1034                 public void AlreadyCompletedChildTaskShouldRunContinuationImmediately ()
1035                 {
1036                         string result = "Failed";
1037                         var testTask = new Task (() =>
1038                         {
1039                                 var child = new Task<string> (() =>
1040                                 {
1041                                         return "Success";
1042                                 }, TaskCreationOptions.AttachedToParent);
1043                                 child.RunSynchronously ();
1044                                 child.ContinueWith (x => { Thread.Sleep (50); result = x.Result; }, TaskContinuationOptions.AttachedToParent | TaskContinuationOptions.NotOnFaulted);
1045                         });
1046                         testTask.RunSynchronously ();
1047
1048                         Assert.AreEqual ("Success", result);
1049                 }
1050
1051                 [Test]
1052                 public void InlineNotTrashingParentRelationship ()
1053                 {
1054                         bool r1 = false, r2 = false;
1055                         var t = new Task (() => {
1056                                 new Task (() => { r1 = true; }, TaskCreationOptions.AttachedToParent).RunSynchronously ();
1057                                 Task.Factory.StartNew (() => { Thread.Sleep (100); r2 = true; }, TaskCreationOptions.AttachedToParent);
1058                     });
1059                         t.RunSynchronously ();
1060
1061                         Assert.IsTrue (r1);
1062                         Assert.IsTrue (r2);
1063                 }
1064
1065                 [Test]
1066                 public void AsyncWaitHandleSet ()
1067                 {
1068                         var task = new TaskFactory ().StartNew (() => { });
1069                         var ar = (IAsyncResult)task;
1070                         ar.AsyncWaitHandle.WaitOne ();
1071                 }
1072
1073 #if NET_4_5
1074                 [Test]
1075                 public void Delay_Invalid ()
1076                 {
1077                         try {
1078                                 Task.Delay (-100);
1079                         } catch (ArgumentOutOfRangeException) {
1080                         }
1081                 }
1082
1083                 [Test]
1084                 public void Delay_Start ()
1085                 {
1086                         var t = Task.Delay (5000);
1087                         try {
1088                                 t.Start ();
1089                         } catch (InvalidOperationException) {
1090                         }
1091                 }
1092
1093                 [Test]
1094                 public void Delay_Simple ()
1095                 {
1096                         var t = Task.Delay (300);
1097                         Assert.IsTrue (TaskStatus.WaitingForActivation == t.Status || TaskStatus.Running == t.Status, "#1");
1098                         Assert.IsTrue (t.Wait (400), "#2");
1099                 }
1100
1101                 [Test]
1102                 public void Delay_Cancelled ()
1103                 {
1104                         var cancelation = new CancellationTokenSource ();
1105
1106                         var t = Task.Delay (5000, cancelation.Token);
1107                         Assert.IsTrue (TaskStatus.WaitingForActivation == t.Status || TaskStatus.Running == t.Status, "#1");
1108                         cancelation.Cancel ();
1109                         try {
1110                                 t.Wait (1000);
1111                                 Assert.Fail ("#2");
1112                         } catch (AggregateException) {
1113                                 Assert.AreEqual (TaskStatus.Canceled, t.Status, "#3");
1114                         }
1115
1116                         cancelation = new CancellationTokenSource ();
1117                         t = Task.Delay (Timeout.Infinite, cancelation.Token);
1118                         Assert.AreEqual (TaskStatus.WaitingForActivation, t.Status, "#11");
1119                         cancelation.Cancel ();
1120                         try {
1121                                 t.Wait (1000);
1122                                 Assert.Fail ("#12");
1123                         } catch (AggregateException) {
1124                                 Assert.AreEqual (TaskStatus.Canceled, t.Status, "#13");
1125                         }
1126                 }
1127
1128                 [Test]
1129                 public void WaitAny_WithNull ()
1130                 {
1131                         var tasks = new [] {
1132                                 Task.FromResult (2),
1133                                 null
1134                         };
1135
1136                         try {
1137                                 Task.WaitAny (tasks);
1138                                 Assert.Fail ();
1139                         } catch (ArgumentException) {
1140                         }
1141                 }
1142
1143                 [Test]
1144                 public void WhenAll_WithNull ()
1145                 {
1146                         var tasks = new[] {
1147                                 Task.FromResult (2),
1148                                 null
1149                         };
1150
1151                         try {
1152                                 Task.WhenAll (tasks);
1153                                 Assert.Fail ("#1");
1154                         } catch (ArgumentException) {
1155                         }
1156
1157                         tasks = null;
1158                         try {
1159                                 Task.WhenAll (tasks);
1160                                 Assert.Fail ("#2");
1161                         } catch (ArgumentException) {
1162                         }
1163                 }
1164
1165                 [Test]
1166                 public void WhenAll_Start ()
1167                 {
1168                         Task[] tasks = new[] {
1169                                 Task.FromResult (2),
1170                         };
1171
1172                         var t = Task.WhenAll (tasks);
1173                         Assert.AreEqual (TaskStatus.RanToCompletion, t.Status, "#1");
1174
1175                         try {
1176                                 t.Start ();
1177                                 Assert.Fail ("#2");
1178                         } catch (InvalidOperationException) {
1179                         }
1180
1181                         tasks = new [] {
1182                                 new Task (delegate { }),
1183                         };
1184
1185                         t = Task.WhenAll (tasks);
1186                         Assert.AreEqual (TaskStatus.WaitingForActivation, t.Status, "#11");
1187
1188                         try {
1189                                 t.Start ();
1190                                 Assert.Fail ("#12");
1191                         } catch (InvalidOperationException) {
1192                         }
1193                 }
1194
1195                 [Test]
1196                 public void WhenAll_Cancelled ()
1197                 {
1198                         var cancelation = new CancellationTokenSource ();
1199                         var tasks = new Task[] {
1200                                 new Task (delegate { }),
1201                                 new Task (delegate { }, cancelation.Token)
1202                         };
1203
1204                         cancelation.Cancel ();
1205
1206                         var t = Task.WhenAll (tasks);
1207                         Assert.AreEqual (TaskStatus.WaitingForActivation, t.Status, "#1");
1208                         tasks[0].Start ();
1209
1210                         try {
1211                                 Assert.IsTrue (t.Wait (1000), "#2");
1212                                 Assert.Fail ("#2a");
1213                         } catch (AggregateException e) {
1214                                 Assert.That (e.InnerException, Is.TypeOf (typeof (TaskCanceledException)), "#3");
1215                         }
1216                 }
1217
1218                 [Test]
1219                 public void WhenAll_Faulted ()
1220                 {
1221                         var tcs = new TaskCompletionSource<object> ();
1222                         tcs.SetException (new ApplicationException ());
1223
1224                         var tcs2 = new TaskCompletionSource<object> ();
1225                         tcs2.SetException (new InvalidTimeZoneException ());
1226
1227                         var cancelation = new CancellationTokenSource ();
1228                         var tasks = new Task[] {
1229                                 new Task (delegate { }),
1230                                 new Task (delegate { }, cancelation.Token),
1231                                 tcs.Task,
1232                                 tcs2.Task
1233                         };
1234
1235                         cancelation.Cancel ();
1236
1237                         var t = Task.WhenAll (tasks);
1238                         Assert.AreEqual (TaskStatus.WaitingForActivation, t.Status, "#1");
1239                         tasks[0].Start ();
1240
1241                         try {
1242                                 Assert.IsTrue (t.Wait (1000), "#2");
1243                                 Assert.Fail ("#2a");
1244                         } catch (AggregateException e) {
1245                                 Assert.That (e.InnerException, Is.TypeOf (typeof (ApplicationException)), "#3");
1246                                 Assert.That (e.InnerExceptions[1], Is.TypeOf (typeof (InvalidTimeZoneException)), "#4");
1247                         }
1248                 }
1249
1250                 [Test]
1251                 public void WhenAll ()
1252                 {
1253                         var t1 = new Task (delegate { });
1254                         var t2 = new Task (delegate { t1.Start (); });
1255
1256                         var tasks = new Task[] {
1257                                 t1,
1258                                 t2,
1259                         };
1260
1261                         var t = Task.WhenAll (tasks);
1262                         Assert.AreEqual (TaskStatus.WaitingForActivation, t.Status, "#1");
1263                         t2.Start ();
1264
1265                         Assert.IsTrue (t.Wait (1000), "#2");
1266                 }
1267
1268                 [Test]
1269                 public void WhenAllResult_WithNull ()
1270                 {
1271                         var tasks = new[] {
1272                                 Task.FromResult (2),
1273                                 null
1274                         };
1275
1276                         try {
1277                                 Task.WhenAll<int> (tasks);
1278                                 Assert.Fail ("#1");
1279                         } catch (ArgumentException) {
1280                         }
1281
1282                         tasks = null;
1283                         try {
1284                                 Task.WhenAll<int> (tasks);
1285                                 Assert.Fail ("#2");
1286                         } catch (ArgumentException) {
1287                         }
1288                 }
1289
1290                 [Test]
1291                 public void WhenAllResult_Cancelled ()
1292                 {
1293                         var cancelation = new CancellationTokenSource ();
1294                         var tasks = new [] {
1295                                 new Task<int> (delegate { return 9; }),
1296                                 new Task<int> (delegate { return 1; }, cancelation.Token)
1297                         };
1298
1299                         cancelation.Cancel ();
1300
1301                         var t = Task.WhenAll (tasks);
1302                         Assert.AreEqual (TaskStatus.WaitingForActivation, t.Status, "#1");
1303                         tasks[0].Start ();
1304
1305                         try {
1306                                 Assert.IsTrue (t.Wait (1000), "#2");
1307                                 Assert.Fail ("#2a");
1308                         } catch (AggregateException e) {
1309                                 Assert.That (e.InnerException, Is.TypeOf (typeof (TaskCanceledException)), "#3");
1310                         }
1311
1312                         try {
1313                                 var r = t.Result;
1314                                 Assert.Fail ("#4");
1315                         } catch (AggregateException) {
1316                         }
1317                 }
1318
1319                 [Test]
1320                 public void WhenAllResult ()
1321                 {
1322                         var t1 = new Task<string> (delegate { return "a"; });
1323                         var t2 = new Task<string> (delegate { t1.Start (); return "b"; });
1324
1325                         var tasks = new [] {
1326                                 t1,
1327                                 t2,
1328                         };
1329
1330                         var t = Task.WhenAll<string> (tasks);
1331                         Assert.AreEqual (TaskStatus.WaitingForActivation, t.Status, "#1");
1332                         t2.Start ();
1333
1334                         Assert.IsTrue (t.Wait (1000), "#2");
1335                         Assert.AreEqual (2, t.Result.Length, "#3");
1336                         Assert.AreEqual ("a", t.Result[0], "#3a");
1337                         Assert.AreEqual ("b", t.Result[1], "#3b");
1338                 }
1339
1340                 [Test]
1341                 public void WhenAllResult_Completed ()
1342                 {
1343                         var tasks = new[] {
1344                                 Task.FromResult (1),
1345                                 Task.FromResult (2)
1346                         };
1347
1348                         var t = Task.WhenAll<int> (tasks);
1349                         Assert.AreEqual (TaskStatus.RanToCompletion, t.Status, "#1");
1350                         Assert.AreEqual (2, t.Result.Length, "#2");
1351                         Assert.AreEqual (1, t.Result[0], "#2a");
1352                         Assert.AreEqual (2, t.Result[1], "#2b");
1353                 }
1354
1355                 [Test]
1356                 public void WhenAny_WithNull ()
1357                 {
1358                         var tasks = new Task[] {
1359                                 Task.FromResult (2),
1360                                 null
1361                         };
1362
1363                         try {
1364                                 Task.WhenAny (tasks);
1365                                 Assert.Fail ("#1");
1366                         } catch (ArgumentException) {
1367                         }
1368
1369                         tasks = null;
1370                         try {
1371                                 Task.WhenAny (tasks);
1372                                 Assert.Fail ("#2");
1373                         } catch (ArgumentException) {
1374                         }
1375
1376                         try {
1377                                 Task.WhenAny (new Task[0]);
1378                                 Assert.Fail ("#3");
1379                         } catch (ArgumentException) {
1380                         }
1381                 }
1382
1383                 [Test]
1384                 public void WhenAny_Start ()
1385                 {
1386                         Task[] tasks = new[] {
1387                                 Task.FromResult (2),
1388                         };
1389
1390                         var t = Task.WhenAny (tasks);
1391                         Assert.AreEqual (TaskStatus.RanToCompletion, t.Status, "#1");
1392
1393                         try {
1394                                 t.Start ();
1395                                 Assert.Fail ("#2");
1396                         } catch (InvalidOperationException) {
1397                         }
1398
1399                         tasks = new[] {
1400                                 new Task (delegate { }),
1401                         };
1402
1403                         t = Task.WhenAny (tasks);
1404                         Assert.AreEqual (TaskStatus.WaitingForActivation, t.Status, "#11");
1405
1406                         try {
1407                                 t.Start ();
1408                                 Assert.Fail ("#12");
1409                         } catch (InvalidOperationException) {
1410                         }
1411                 }
1412
1413                 [Test]
1414                 public void WhenAny_Cancelled ()
1415                 {
1416                         var cancelation = new CancellationTokenSource ();
1417                         var tasks = new Task[] {
1418                                 new Task (delegate { }),
1419                                 new Task (delegate { }, cancelation.Token)
1420                         };
1421
1422                         cancelation.Cancel ();
1423
1424                         var t = Task.WhenAny (tasks);
1425                         Assert.AreEqual (TaskStatus.RanToCompletion, t.Status, "#1");
1426                         tasks[0].Start ();
1427
1428                         Assert.IsTrue (t.Wait (1000), "#2");
1429                         Assert.AreEqual (TaskStatus.Canceled, t.Result.Status, "#3");
1430                 }
1431
1432                 [Test]
1433                 public void WhenAny_Faulted ()
1434                 {
1435                         var tcs = new TaskCompletionSource<object> ();
1436                         tcs.SetException (new ApplicationException ());
1437
1438                         var tcs2 = new TaskCompletionSource<object> ();
1439                         tcs2.SetException (new InvalidTimeZoneException ());
1440
1441                         var cancelation = new CancellationTokenSource ();
1442                         var tasks = new Task[] {
1443                                 new Task (delegate { }),
1444                                 tcs.Task,
1445                                 new Task (delegate { }, cancelation.Token),
1446                                 tcs2.Task
1447                         };
1448
1449                         cancelation.Cancel ();
1450
1451                         var t = Task.WhenAny (tasks);
1452                         Assert.AreEqual (TaskStatus.RanToCompletion, t.Status, "#1");
1453                         tasks[0].Start ();
1454
1455                         Assert.IsTrue (t.Wait (1000), "#2");
1456                         Assert.IsNull (t.Exception, "#3");
1457
1458                         Assert.That (t.Result.Exception.InnerException, Is.TypeOf (typeof (ApplicationException)), "#4");
1459                 }
1460
1461                 [Test]
1462                 public void WhenAny ()
1463                 {
1464                         var t1 = new Task (delegate { });
1465                         var t2 = new Task (delegate { t1.Start (); });
1466
1467                         var tasks = new Task[] {
1468                                 t1,
1469                                 t2,
1470                         };
1471
1472                         var t = Task.WhenAny (tasks);
1473                         Assert.AreEqual (TaskStatus.WaitingForActivation, t.Status, "#1");
1474                         t2.Start ();
1475
1476                         Assert.IsTrue (t.Wait (1000), "#2");
1477                         Assert.IsNotNull (t.Result, "#3");
1478                 }
1479
1480                 [Test]
1481                 public void WhenAnyResult_WithNull ()
1482                 {
1483                         var tasks = new [] {
1484                                 Task.FromResult (2),
1485                                 null
1486                         };
1487
1488                         try {
1489                                 Task.WhenAny<int> (tasks);
1490                                 Assert.Fail ("#1");
1491                         } catch (ArgumentException) {
1492                         }
1493
1494                         tasks = null;
1495                         try {
1496                                 Task.WhenAny<int> (tasks);
1497                                 Assert.Fail ("#2");
1498                         } catch (ArgumentException) {
1499                         }
1500
1501                         try {
1502                                 Task.WhenAny<short> (new Task<short>[0]);
1503                                 Assert.Fail ("#3");
1504                         } catch (ArgumentException) {
1505                         }
1506                 }
1507
1508                 [Test]
1509                 public void WhenAnyResult_Start ()
1510                 {
1511                         var tasks = new[] {
1512                                 Task.FromResult (2),
1513                         };
1514
1515                         var t = Task.WhenAny<int> (tasks);
1516                         Assert.AreEqual (TaskStatus.RanToCompletion, t.Status, "#1");
1517
1518                         try {
1519                                 t.Start ();
1520                                 Assert.Fail ("#2");
1521                         } catch (InvalidOperationException) {
1522                         }
1523
1524                         tasks = new[] {
1525                                 new Task<int> (delegate { return 55; }),
1526                         };
1527
1528                         t = Task.WhenAny<int> (tasks);
1529                         Assert.AreEqual (TaskStatus.WaitingForActivation, t.Status, "#11");
1530
1531                         try {
1532                                 t.Start ();
1533                                 Assert.Fail ("#12");
1534                         } catch (InvalidOperationException) {
1535                         }
1536                 }
1537
1538                 [Test]
1539                 public void WhenAnyResult_Cancelled ()
1540                 {
1541                         var cancelation = new CancellationTokenSource ();
1542                         var tasks = new [] {
1543                                 new Task<double> (delegate { return 1.1; }),
1544                                 new Task<double> (delegate { return -4.4; }, cancelation.Token)
1545                         };
1546
1547                         cancelation.Cancel ();
1548
1549                         var t = Task.WhenAny<double> (tasks);
1550                         Assert.AreEqual (TaskStatus.RanToCompletion, t.Status, "#1");
1551                         tasks[0].Start ();
1552
1553                         Assert.IsTrue (t.Wait (1000), "#2");
1554                         Assert.AreEqual (TaskStatus.Canceled, t.Result.Status, "#3");
1555                 }
1556
1557                 [Test]
1558                 public void WhenAnyResult_Faulted ()
1559                 {
1560                         var tcs = new TaskCompletionSource<object> ();
1561                         tcs.SetException (new ApplicationException ());
1562
1563                         var tcs2 = new TaskCompletionSource<object> ();
1564                         tcs2.SetException (new InvalidTimeZoneException ());
1565
1566                         var cancelation = new CancellationTokenSource ();
1567                         var tasks = new Task<object>[] {
1568                                 new Task<object> (delegate { return null; }),
1569                                 tcs.Task,
1570                                 new Task<object> (delegate { return ""; }, cancelation.Token),
1571                                 tcs2.Task
1572                         };
1573
1574                         cancelation.Cancel ();
1575
1576                         var t = Task.WhenAny<object> (tasks);
1577                         Assert.AreEqual (TaskStatus.RanToCompletion, t.Status, "#1");
1578                         tasks[0].Start ();
1579
1580                         Assert.IsTrue (t.Wait (1000), "#2");
1581                         Assert.IsNull (t.Exception, "#3");
1582
1583                         Assert.That (t.Result.Exception.InnerException, Is.TypeOf (typeof (ApplicationException)), "#4");
1584                 }
1585
1586                 [Test]
1587                 public void WhenAnyResult ()
1588                 {
1589                         var t1 = new Task<byte> (delegate { return 3; });
1590                         var t2 = new Task<byte> (delegate { t1.Start (); return 2; });
1591
1592                         var tasks = new [] {
1593                                 t1,
1594                                 t2,
1595                         };
1596
1597                         var t = Task.WhenAny<byte> (tasks);
1598                         Assert.AreEqual (TaskStatus.WaitingForActivation, t.Status, "#1");
1599                         t2.Start ();
1600
1601                         Assert.IsTrue (t.Wait (1000), "#2");
1602                         Assert.IsTrue (t.Result.Result > 1, "#3");
1603                 }
1604
1605                 [Test]
1606                 public void ContinueWith_StateValue ()
1607                 {
1608                         var t = Task.Factory.StartNew (l => {
1609                                 Assert.AreEqual (1, l, "a-1");
1610                         }, 1);
1611
1612                         var c = t.ContinueWith ((a, b) => {
1613                                 Assert.AreEqual (t, a, "c-1");
1614                                 Assert.AreEqual (2, b, "c-2");
1615                         }, 2);
1616
1617                         var d = t.ContinueWith ((a, b) => {
1618                                 Assert.AreEqual (t, a, "d-1");
1619                                 Assert.AreEqual (3, b, "d-2");
1620                                 return 77;
1621                         }, 3);
1622
1623                         Assert.IsTrue (d.Wait (1000), "#1");
1624
1625                         Assert.AreEqual (1, t.AsyncState, "#2");
1626                         Assert.AreEqual (2, c.AsyncState, "#3");
1627                         Assert.AreEqual (3, d.AsyncState, "#4");
1628                 }
1629
1630                 [Test]
1631                 public void ContinueWith_StateValueGeneric ()
1632                 {
1633                         var t = Task<int>.Factory.StartNew (l => {
1634                                 Assert.AreEqual (1, l, "a-1");
1635                                 return 80;
1636                         }, 1);
1637
1638                         var c = t.ContinueWith ((a, b) => {
1639                                 Assert.AreEqual (t, a, "c-1");
1640                                 Assert.AreEqual (2, b, "c-2");
1641                                 return "c";
1642                         }, 2);
1643
1644                         var d = t.ContinueWith ((a, b) => {
1645                                 Assert.AreEqual (t, a, "d-1");
1646                                 Assert.AreEqual (3, b, "d-2");
1647                                 return 'd';
1648                         }, 3);
1649
1650                         Assert.IsTrue (d.Wait (1000), "#1");
1651
1652                         Assert.AreEqual (1, t.AsyncState, "#2");
1653                         Assert.AreEqual (80, t.Result, "#2r");
1654                         Assert.AreEqual (2, c.AsyncState, "#3");
1655                         Assert.AreEqual ("c", c.Result, "#3r");
1656                         Assert.AreEqual (3, d.AsyncState, "#4");
1657                         Assert.AreEqual ('d', d.Result, "#3r");
1658                 }
1659
1660                 [Test]
1661                 public void ContinueWith_CustomScheduleRejected ()
1662                 {
1663                         var scheduler = new NonInlineableScheduler ();
1664                         var t = Task.Factory.StartNew (delegate { }).
1665                                 ContinueWith (r => {}, CancellationToken.None, TaskContinuationOptions.ExecuteSynchronously, scheduler);
1666
1667                         Assert.IsTrue (t.Wait (5000));
1668                 }
1669
1670                 [Test]
1671                 public void FromResult ()
1672                 {
1673                         var t = Task.FromResult<object> (null);
1674                         Assert.IsTrue (t.IsCompleted, "#1");
1675                         Assert.AreEqual (null, t.Result, "#2");
1676                         t.Dispose ();
1677                         t.Dispose ();
1678                 }
1679
1680                 [Test]
1681                 public void LongRunning ()
1682                 {
1683                         bool? is_tp = null;
1684                         bool? is_bg = null;
1685                         var t = new Task (() => { is_tp = Thread.CurrentThread.IsThreadPoolThread; is_bg = Thread.CurrentThread.IsBackground; });
1686                         t.Start ();
1687                         Assert.IsTrue (t.Wait (100));
1688                         Assert.IsTrue ((bool)is_tp, "#1");
1689                         Assert.IsTrue ((bool)is_bg, "#2");
1690
1691                         is_tp = null;
1692                         is_bg = null;
1693                         t = new Task (() => { is_tp = Thread.CurrentThread.IsThreadPoolThread; is_bg = Thread.CurrentThread.IsBackground; }, TaskCreationOptions.LongRunning);
1694                         t.Start ();
1695
1696                         Assert.IsTrue (t.Wait (100));
1697                         Assert.IsFalse ((bool) is_tp, "#11");
1698                         Assert.IsTrue ((bool) is_bg, "#12");
1699                 }
1700
1701                 [Test]
1702                 public void Run_ArgumentCheck ()
1703                 {
1704                         try {
1705                                 Task.Run (null as Action);
1706                                 Assert.Fail ("#1");
1707                         } catch (ArgumentNullException) {
1708                         }
1709                 }
1710
1711                 [Test]
1712                 public void Run ()
1713                 {
1714                         bool ranOnDefaultScheduler = false;
1715                         var t = Task.Run (delegate { ranOnDefaultScheduler = Thread.CurrentThread.IsThreadPoolThread; });
1716                         Assert.AreEqual (TaskCreationOptions.DenyChildAttach, t.CreationOptions, "#1");
1717                         t.Wait ();
1718                         Assert.IsTrue (ranOnDefaultScheduler, "#2");
1719                 }
1720
1721                 [Test]
1722                 public void Run_Cancel ()
1723                 {
1724                         var t = Task.Run (() => 1, new CancellationToken (true));
1725                         try {
1726                                 var r = t.Result;
1727                                 Assert.Fail ("#1");
1728                         } catch (AggregateException) {
1729                         }
1730
1731                         Assert.IsTrue (t.IsCanceled, "#2");
1732                 }
1733
1734                 [Test]
1735                 public void Run_ExistingTaskT ()
1736                 {
1737                         var t = new Task<int> (() => 5);
1738                         var t2 = Task.Run (() => { t.Start (); return t; });
1739
1740                         Assert.IsTrue (t2.Wait (1000), "#1");
1741                         Assert.AreEqual (5, t2.Result, "#2");
1742                 }
1743
1744                 [Test]
1745                 public void Run_ExistingTask ()
1746                 {
1747                         var t = new Task (delegate { throw new Exception ("Foo"); });
1748                         var t2 = Task.Run (() => { t.Start (); return t; });
1749
1750                         try {
1751                                 t2.Wait (1000);
1752                                 Assert.Fail ();
1753                         } catch (Exception) {}
1754
1755                         Assert.AreEqual (TaskStatus.Faulted, t.Status, "#2");
1756                 }
1757
1758                 [Test]
1759                 public void DenyChildAttachTest ()
1760                 {
1761                         var mre = new ManualResetEventSlim ();
1762                         Task nested = null;
1763                         Task parent = Task.Factory.StartNew (() => {
1764                                 nested = Task.Factory.StartNew (() => mre.Wait (2000), TaskCreationOptions.AttachedToParent);
1765                         }, TaskCreationOptions.DenyChildAttach);
1766                         Assert.IsTrue (parent.Wait (1000), "#1");
1767                         mre.Set ();
1768                         Assert.IsTrue (nested.Wait (2000), "#2");
1769                 }
1770
1771                 class SynchronousScheduler : TaskScheduler
1772                 {
1773                         protected override IEnumerable<Task> GetScheduledTasks ()
1774                         {
1775                                 throw new NotImplementedException ();
1776                         }
1777
1778                         protected override void QueueTask (Task task)
1779                         {
1780                                 TryExecuteTaskInline (task, false);
1781                         }
1782
1783                         protected override bool TryExecuteTaskInline (Task task, bool taskWasPreviouslyQueued)
1784                         {
1785                                 return base.TryExecuteTask (task);
1786                         }
1787                 }
1788
1789                 [Test]
1790                 public void HideSchedulerTest ()
1791                 {
1792                         var mre = new ManualResetEventSlim ();
1793                         var ranOnDefault = false;
1794                         var scheduler = new SynchronousScheduler ();
1795
1796                         Task parent = Task.Factory.StartNew (() => {
1797                                 Task.Factory.StartNew (() => {
1798                                         ranOnDefault = Thread.CurrentThread.IsThreadPoolThread;
1799                                         mre.Set ();
1800                                 });
1801                         }, CancellationToken.None, TaskCreationOptions.HideScheduler, scheduler);
1802
1803                         Assert.IsTrue (mre.Wait (1000), "#1");
1804                         Assert.IsTrue (ranOnDefault, "#2");
1805                 }
1806
1807                 [Test]
1808                 public void LazyCancelationTest ()
1809                 {
1810                         var source = new CancellationTokenSource ();
1811                         source.Cancel ();
1812                         var parent = new Task (delegate {});
1813                         var cont = parent.ContinueWith (delegate {}, source.Token, TaskContinuationOptions.LazyCancellation, TaskScheduler.Default);
1814
1815                         Assert.AreNotEqual (TaskStatus.Canceled, cont.Status, "#1");
1816                         parent.Start ();
1817                         try {
1818                                 Assert.IsTrue (cont.Wait (1000), "#2");
1819                                 Assert.Fail ();
1820                         } catch (AggregateException ex) {
1821                                 Assert.That (ex.InnerException, Is.TypeOf (typeof (TaskCanceledException)), "#3");
1822                         }
1823                 }
1824 #endif
1825         }
1826 }
1827 #endif