mcs/class/corlib/Test/System.Collections.Generic/ListTest.cs

   1 //
   2 // MonoTests.System.Collections.Generic.Test.ListTest
   3 //
   4 // Authors:
   5 //      David Waite (mass@akuma.org)
   6 //      Andres G. Aragoneses (andres.aragoneses@7digital.com)
   7 //
   8 // Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
   9 // Copyright (C) 2005 David Waite (mass@akuma.org)
  10 // Copyright 2011 Xamarin Inc (http://www.xamarin.com).
  11 // Copyright 2012 7digital Ltd (http://www.7digital.com).
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32
  33 using System;
  34 using System.Collections;
  35 using System.Collections.Generic;
  36 using System.Collections.ObjectModel;
  37 using System.IO;
  38 using System.Runtime.Serialization.Formatters.Binary;
  39 using System.Text;
  40
  41 using NUnit.Framework;
  42
  43 namespace MonoTests.System.Collections.Generic {
  44
  45         class GenericComparer<T> : IComparer<T> {
  46
  47                 private bool called = false;
  48
  49                 public bool Called {
  50                         get {
  51                                 bool result = called;
  52                                 called = false;
  53                                 return called;
  54                         }
  55                 }
  56
  57                 public int Compare (T x, T y)
  58                 {
  59                         called = true;
  60                         return 0;
  61                 }
  62         }
  63
  64         [TestFixture]
  65         public class ListTest
  66         {
  67                 static byte [] _serializedList = new byte [] {
  68                         0x00, 0x01, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0x01, 0x00,
  69                         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x01, 0x00, 0x00, 0x00,
  70                         0x7e, 0x53, 0x79, 0x73, 0x74, 0x65, 0x6d, 0x2e, 0x43, 0x6f, 0x6c,
  71                         0x6c, 0x65, 0x63, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x2e, 0x47, 0x65,
  72                         0x6e, 0x65, 0x72, 0x69, 0x63, 0x2e, 0x4c, 0x69, 0x73, 0x74, 0x60,
  73                         0x31, 0x5b, 0x5b, 0x53, 0x79, 0x73, 0x74, 0x65, 0x6d, 0x2e, 0x49,
  74                         0x6e, 0x74, 0x33, 0x32, 0x2c, 0x20, 0x6d, 0x73, 0x63, 0x6f, 0x72,
  75                         0x6c, 0x69, 0x62, 0x2c, 0x20, 0x56, 0x65, 0x72, 0x73, 0x69, 0x6f,
  76                         0x6e, 0x3d, 0x32, 0x2e, 0x30, 0x2e, 0x30, 0x2e, 0x30, 0x2c, 0x20,
  77                         0x43, 0x75, 0x6c, 0x74, 0x75, 0x72, 0x65, 0x3d, 0x6e, 0x65, 0x75,
  78                         0x74, 0x72, 0x61, 0x6c, 0x2c, 0x20, 0x50, 0x75, 0x62, 0x6c, 0x69,
  79                         0x63, 0x4b, 0x65, 0x79, 0x54, 0x6f, 0x6b, 0x65, 0x6e, 0x3d, 0x62,
  80                         0x37, 0x37, 0x61, 0x35, 0x63, 0x35, 0x36, 0x31, 0x39, 0x33, 0x34,
  81                         0x65, 0x30, 0x38, 0x39, 0x5d, 0x5d, 0x03, 0x00, 0x00, 0x00, 0x06,
  82                         0x5f, 0x69, 0x74, 0x65, 0x6d, 0x73, 0x05, 0x5f, 0x73, 0x69, 0x7a,
  83                         0x65, 0x08, 0x5f, 0x76, 0x65, 0x72, 0x73, 0x69, 0x6f, 0x6e, 0x07,
  84                         0x00, 0x00, 0x08, 0x08, 0x08, 0x09, 0x02, 0x00, 0x00, 0x00, 0x03,
  85                         0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x0f, 0x02, 0x00, 0x00,
  86                         0x00, 0x04, 0x00, 0x00, 0x00, 0x08, 0x05, 0x00, 0x00, 0x00, 0x00,
  87                         0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  88                         0x0b };
  89                 int [] _list1_contents;
  90                 List <int> _list1;
  91
  92                 [SetUp]
  93                 public void SetUp ()
  94                 {
  95                         // FIXME arrays currently do not support generic collection
  96                         // interfaces
  97                         _list1_contents = new int [] { 55, 50, 22, 80, 56, 52, 40, 63 };
  98                         // _list1 = new List <int> (_list1_contents);
  99
 100                         _list1 = new List <int> (8);
 101                         foreach (int i in _list1_contents)
 102                                 _list1.Add (i);
 103                 }
 104
 105                 [Test]  // This was for bug #74980
 106                 public void InsertTest ()
 107                 {
 108                         List <string> test = new List <string> ();
 109                         test.Insert (0, "a");
 110                         test.Insert (0, "b");
 111                         test.Insert (1, "c");
 112
 113                         Assert.AreEqual (3, test.Count);
 114                         Assert.AreEqual ("b", test [0]);
 115                         Assert.AreEqual ("c", test [1]);
 116                         Assert.AreEqual ("a", test [2]);
 117                 }
 118
 119                 [Test]
 120                 public void InsertRangeTest ()
 121                 {
 122                         int count = _list1.Count;
 123                         // FIXME arrays currently do not support generic collection
 124                         // interfaces
 125                         int [] items = {1, 2, 3};
 126                         // List <int> newRange = new List <int> (items);
 127                         List <int> newRange = new List <int> (3);
 128                         foreach (int i in items)
 129                                 newRange.Add (i);
 130                         _list1.InsertRange (1, newRange);
 131                         Assert.AreEqual (count + 3, _list1.Count);
 132                         Assert.AreEqual (55, _list1 [0]);
 133                         Assert.AreEqual (1, _list1 [1]);
 134                         Assert.AreEqual (2, _list1 [2]);
 135                         Assert.AreEqual (3, _list1 [3]);
 136                         Assert.AreEqual (50, _list1 [4]);
 137
 138                         newRange = new List <int> ();
 139                         List <int> li = new List <int> ();
 140                         li.Add (1);
 141                         newRange.InsertRange (0, li);
 142                         newRange.InsertRange (newRange.Count, li);
 143                         Assert.AreEqual (2, newRange.Count);
 144                 }
 145
 146                 [Test]
 147                 public void InsertSelfTest()
 148                 {
 149                         List <int> range = new List <int> (5);
 150                         for (int i = 0; i < 5; ++ i)
 151                                 range.Add (i);
 152
 153                         range.InsertRange(2, range);
 154                         Assert.AreEqual (10, range.Count);
 155                         Assert.AreEqual (0, range [0]);
 156                         Assert.AreEqual (1, range [1]);
 157                         Assert.AreEqual (0, range [2]);
 158                         Assert.AreEqual (1, range [3]);
 159                         Assert.AreEqual (2, range [4]);
 160                         Assert.AreEqual (3, range [5]);
 161                         Assert.AreEqual (4, range [6]);
 162                         Assert.AreEqual (2, range [7]);
 163                         Assert.AreEqual (3, range [8]);
 164                         Assert.AreEqual (4, range [9]);
 165                 }
 166
 167                 [Test, ExpectedException (typeof (ArgumentNullException))]
 168                 public void InsertRangeNullTest ()
 169                 {
 170                         IEnumerable <int> n = null;
 171                         _list1.InsertRange (0, n);
 172                 }
 173
 174                 [Test, ExpectedException (typeof (ArgumentOutOfRangeException))]
 175                 public void InsertRangeNegativeIndexTest ()
 176                 {
 177                         _list1.InsertRange (-1, _list1);
 178                 }
 179
 180                 [Test]
 181                 public void IndexOfTest ()
 182                 {
 183                         List <int> l = new List <int> ();
 184
 185                         l.Add (100);
 186                         l.Add (200);
 187
 188                         Assert.AreEqual (1, l.IndexOf (200), "Could not find value");
 189                 }
 190
 191                 [Test, ExpectedException(typeof (ArgumentException))]
 192                 public void IList_InsertInvalidType1 ()
 193                 {
 194                         IList list = _list1 as IList;
 195                         list.Insert(0, new object());
 196                 }
 197
 198                 [Test, ExpectedException(typeof (ArgumentException))]
 199                 public void IList_InsertInvalidType2 ()
 200                 {
 201                         IList list = _list1 as IList;
 202                         list.Insert(0, null);
 203                 }
 204
 205                 [Test, ExpectedException(typeof (ArgumentException))]
 206                 public void IList_AddInvalidType1()
 207                 {
 208                         IList list = _list1 as IList;
 209                         list.Add(new object());
 210                 }
 211
 212                 [Test, ExpectedException(typeof (ArgumentException))]
 213                 public void IList_AddInvalidType2()
 214                 {
 215                         IList list = _list1 as IList;
 216                         list.Add(null);
 217                 }
 218
 219                 [Test]
 220                 public void IList_RemoveInvalidType()
 221                 {
 222                         IList list = _list1 as IList;
 223                         int nCount = list.Count;
 224                         list.Remove(new object());
 225                         Assert.AreEqual(nCount, list.Count);
 226
 227                         list.Remove(null);
 228                         Assert.AreEqual(nCount, list.Count);
 229                 }
 230
 231                 [Test, ExpectedException (typeof (ArgumentOutOfRangeException))]
 232                 public void IndexOfOutOfRangeTest ()
 233                 {
 234                         List <int> l = new List <int> (4);
 235                         l.IndexOf (0, 0, 4);
 236                 }
 237
 238                 [Test]
 239                 public void GetRangeTest ()
 240                 {
 241                         List <int> r = _list1.GetRange (2, 4);
 242                         Assert.AreEqual (4, r.Count);
 243                         Assert.AreEqual (22, r [0]);
 244                         Assert.AreEqual (80, r [1]);
 245                         Assert.AreEqual (56, r [2]);
 246                         Assert.AreEqual (52, r [3]);
 247                 }
 248
 249                 [Test]
 250                 public void EnumeratorTest ()
 251                 {
 252                         List <int>.Enumerator e = _list1.GetEnumerator ();
 253                         for (int i = 0; i < _list1_contents.Length; i++)
 254                         {
 255                                 Assert.IsTrue (e.MoveNext ());
 256                                 Assert.AreEqual (_list1_contents [i], e.Current);
 257                         }
 258                         Assert.IsFalse (e.MoveNext ());
 259                 }
 260
 261                 [Test]
 262                 public void ConstructWithSizeTest ()
 263                 {
 264                         List <object> l_1 = new List <object> (1);
 265                         List <object> l_2 = new List <object> (50);
 266                         List <object> l_3 = new List <object> (0);
 267
 268                         Assert.AreEqual (1, l_1.Capacity);
 269                         Assert.AreEqual (50, l_2.Capacity);
 270                         Assert.AreEqual (0, l_3.Capacity);
 271                 }
 272
 273                 [Test, ExpectedException (typeof (ArgumentOutOfRangeException))]
 274                 public void ConstructWithInvalidSizeTest ()
 275                 {
 276                         List <int> l = new List <int> (-1);
 277                 }
 278
 279                 [Test]
 280                 public void ConstructWithCollectionTest ()
 281                 {
 282                         List <int> l1 = new List <int> (_list1);
 283                         Assert.AreEqual (_list1.Count, l1.Count);
 284                         Assert.AreEqual (l1.Count, l1.Capacity);
 285                         for (int i = 0; i < l1.Count; i++)
 286                                 Assert.AreEqual (_list1 [i], l1 [i]);
 287
 288                         var input = new [] { "a", "b", "c" };
 289                         var l2 = new List<string>(input);
 290                         Assert.AreEqual (3, l2.Capacity);
 291                 }
 292
 293                 [Test, ExpectedException (typeof (ArgumentNullException))]
 294                 public void ConstructWithInvalidCollectionTest ()
 295                 {
 296                         List <int> n = null;
 297                         List <int> l1 = new List <int> (n);
 298                 }
 299
 300                 [Test]
 301                 public void AddTest ()
 302                 {
 303                         int count = _list1.Count;
 304                         _list1.Add (-1);
 305                         Assert.AreEqual (count + 1, _list1.Count);
 306                         Assert.AreEqual (-1, _list1 [_list1.Count - 1]);
 307                 }
 308
 309                 [Test]
 310                 public void AddRangeTest ()
 311                 {
 312                         int count = _list1.Count;
 313                         // FIXME arrays currently do not support generic collection
 314                         // interfaces
 315                         int [] range = { -1, -2, -3 };
 316                         List <int> tmp = new List <int> (3);
 317                         foreach (int i in range)
 318                                 tmp.Add (i);
 319                         // _list1.AddRange (range);
 320                         _list1.AddRange (tmp);
 321
 322                         Assert.AreEqual (count + 3, _list1.Count);
 323                         Assert.AreEqual (-1, _list1 [_list1.Count - 3]);
 324                         Assert.AreEqual (-2, _list1 [_list1.Count - 2]);
 325                         Assert.AreEqual (-3, _list1 [_list1.Count - 1]);
 326                 }
 327
 328                 [Test, ExpectedException (typeof (ArgumentNullException))]
 329                 public void AddNullRangeTest ()
 330                 {
 331                         int [] n = null;
 332                         _list1.AddRange (n);
 333                 }
 334
 335                 [Test]
 336                 public void BinarySearchTest ()
 337                 {
 338                         List <int> l = new List <int> (_list1);
 339                         l.Sort ();
 340                         Assert.AreEqual (0, l.BinarySearch (22));
 341                         Assert.AreEqual (-2, l.BinarySearch (23));
 342                         Assert.AreEqual (- (l.Count + 1), l.BinarySearch (int.MaxValue));
 343                 }
 344
 345 #if !NET_4_0 // FIXME: the blob contains the 2.0 mscorlib version
 346
 347                 [Test]
 348                 public void SerializeTest ()
 349                 {
 350                         List <int> list = new List <int> ();
 351                         list.Add (5);
 352                         list.Add (0);
 353                         list.Add (7);
 354
 355                         BinaryFormatter bf = new BinaryFormatter ();
 356                         MemoryStream ms = new MemoryStream ();
 357                         bf.Serialize (ms, list);
 358
 359                         byte [] buffer = new byte [ms.Length];
 360                         ms.Position = 0;
 361                         ms.Read (buffer, 0, buffer.Length);
 362
 363                         Assert.AreEqual (_serializedList, buffer);
 364                 }
 365
 366 #endif
 367
 368                 [Test]
 369                 public void DeserializeTest ()
 370                 {
 371                         MemoryStream ms = new MemoryStream ();
 372                         ms.Write (_serializedList, 0, _serializedList.Length);
 373                         ms.Position = 0;
 374
 375                         BinaryFormatter bf = new BinaryFormatter ();
 376                         List<int> list = (List<int>) bf.Deserialize (ms);
 377                         Assert.AreEqual (3, list.Count, "#1");
 378                         Assert.AreEqual (5, list [0], "#2");
 379                         Assert.AreEqual (0, list [1], "#3");
 380                         Assert.AreEqual (7, list [2], "#4");
 381                 }
 382
 383                 [Test]
 384                 public void SortTest ()
 385                 {
 386                         List <int> l = new List <int> (_list1);
 387                         l.Sort ();
 388                         Assert.AreEqual (_list1.Count, l.Count);
 389                         Assert.AreEqual (22, l [0]);
 390                         int minimum = 22;
 391                         foreach (int i in l)
 392                         {
 393                                 Assert.IsTrue (minimum <= i);
 394                                 minimum = i;
 395                         }
 396                 }
 397
 398                 [Test]
 399                 public void ClearTest ()
 400                 {
 401                         int capacity = _list1.Capacity;
 402                         _list1.Clear ();
 403                         Assert.AreEqual (0, _list1.Count);
 404                         Assert.AreEqual (capacity, _list1.Capacity);
 405                 }
 406
 407                 [Test]
 408                 public void ContainsTest ()
 409                 {
 410                         Assert.IsTrue (_list1.Contains (22));
 411                         Assert.IsFalse (_list1.Contains (23));
 412                 }
 413
 414                 private string StringConvert (int i)
 415                 {
 416                         return i.ToString ();
 417                 }
 418
 419                 [Test]
 420                 public void ConvertAllTest ()
 421                 {
 422                         List <string> s = _list1.ConvertAll ( (Converter <int, string>)StringConvert);
 423                         Assert.AreEqual (_list1.Count, s.Count);
 424                         Assert.AreEqual ("55", s [0]);
 425                 }
 426
 427                 [Test]
 428                 public void CopyToTest ()
 429                 {
 430                         int [] a = new int [2];
 431                         _list1.CopyTo (1, a, 0, 2);
 432                         Assert.AreEqual (50, a [0]);
 433                         Assert.AreEqual (22, a [1]);
 434
 435                         int [] b = new int [_list1.Count + 1];
 436                         b [_list1.Count] = 555;
 437                         _list1.CopyTo (b);
 438                         Assert.AreEqual (55, b [0]);
 439                         Assert.AreEqual (555, b [_list1.Count]);
 440
 441                         b [0] = 888;
 442                         _list1.CopyTo (b, 1);
 443                         Assert.AreEqual (888, b [0]);
 444                         Assert.AreEqual (55, b [1]);
 445                 }
 446
 447                 [Test, ExpectedException (typeof (ArgumentNullException))]
 448                 public void CopyToNullTest ()
 449                 {
 450                         int [] a = null;
 451                         _list1.CopyTo (0, a, 0, 0);
 452                 }
 453
 454                 static bool FindMultipleOfThree (int i)
 455                 {
 456                         return (i % 3) == 0;
 457                 }
 458
 459                 static bool FindMultipleOfFour (int i)
 460                 {
 461                         return (i % 4) == 0;
 462                 }
 463
 464                 static bool FindMultipleOfTwelve (int i)
 465                 {
 466                         return (i % 12) == 0;
 467                 }
 468
 469                 [Test]
 470                 public void FindTest ()
 471                 {
 472                         int i = _list1.Find (FindMultipleOfThree);
 473                         Assert.AreEqual (63, i);
 474
 475                         i = _list1.Find (FindMultipleOfTwelve);
 476                         Assert.AreEqual (default (int), i);
 477                 }
 478
 479                 [Test, ExpectedException (typeof (ArgumentNullException))]
 480                 public void FindNullTest ()
 481                 {
 482                         int i = _list1.Find (null);
 483                 }
 484
 485                 [Test]
 486                 public void FindAllSmallTest ()
 487                 {
 488                         List <int> findings = _list1.FindAll (FindMultipleOfFour);
 489                         Assert.AreEqual (4, findings.Count);
 490                         Assert.AreEqual (80, findings [0]);
 491                         Assert.AreEqual (56, findings [1]);
 492                         Assert.AreEqual (52, findings [2]);
 493                         Assert.AreEqual (40, findings [3]);
 494
 495                         findings = _list1.FindAll (FindMultipleOfTwelve);
 496                         Assert.IsNotNull (findings);
 497                         Assert.AreEqual (0, findings.Count);
 498                 }
 499
 500                 [Test]
 501                 public void FindAllMediumTest ()
 502                 {
 503                         List <int> integers = new List <int> (10000);
 504                         for (int i = 1; i <= 10000; i++)
 505                                 integers.Add (i);
 506
 507                         List <int> results = integers.FindAll (FindMultipleOfFour);
 508
 509                         Assert.IsNotNull (results);
 510                         Assert.AreEqual (2500, results.Count);
 511
 512                         results = integers.FindAll (FindMultipleOfTwelve);
 513
 514                         Assert.IsNotNull (results);
 515                         Assert.AreEqual (833, results.Count);
 516                 }
 517
 518                 [Test]
 519                 public void FindAllLargeTest ()
 520                 {
 521                         List <int> integers = new List <int> (70000);
 522                         for (int i = 1; i <= 80000; i++)
 523                                 integers.Add (i);
 524
 525                         List <int> results = integers.FindAll (FindMultipleOfFour);
 526
 527                         Assert.IsNotNull (results);
 528                         Assert.AreEqual (20000, results.Count);
 529
 530                         results = integers.FindAll (FindMultipleOfTwelve);
 531
 532                         Assert.IsNotNull (results);
 533                         Assert.AreEqual (6666, results.Count);
 534                 }
 535
 536                 [Test, ExpectedException (typeof (ArgumentNullException))]
 537                 public void FindAllNullTest ()
 538                 {
 539                         List <int> findings = _list1.FindAll (null);
 540                 }
 541
 542                 [Test]
 543                 public void FindIndexTest ()
 544                 {
 545                         int i = _list1.FindIndex (FindMultipleOfThree);
 546                         Assert.AreEqual (7, i);
 547
 548                         i = _list1.FindIndex (FindMultipleOfTwelve);
 549                         Assert.AreEqual (-1, i);
 550
 551                         var a = new List<int> () { 2, 2, 2, 3, 2 };
 552                         Assert.AreEqual (2, a.FindIndex (2, 2, l => true));
 553                 }
 554
 555                 [Test]
 556                 public void FindIndex_Invalid ()
 557                 {
 558                         try {
 559                                 _list1.FindIndex (null);
 560                                 Assert.Fail ("#1");
 561                         } catch (ArgumentNullException) {
 562                         }
 563
 564                         try {
 565                                 _list1.FindIndex (-1, l => true);
 566                                 Assert.Fail ("#2");
 567                         } catch (ArgumentOutOfRangeException) {
 568                         }
 569
 570                         try {
 571                                 _list1.FindIndex (-1, 0, l => true);
 572                                 Assert.Fail ("#2b");
 573                         } catch (ArgumentOutOfRangeException) {
 574                         }
 575
 576                         try {
 577                                 _list1.FindIndex (0, -1, l => true);
 578                                 Assert.Fail ("#3");
 579                         } catch (ArgumentOutOfRangeException) {
 580                         }
 581
 582                         try {
 583                                 _list1.FindIndex (100, l => true);
 584                                 Assert.Fail ("#4");
 585                         } catch (ArgumentOutOfRangeException) {
 586                         }
 587
 588                         try {
 589                                 _list1.FindIndex (100, 0, l => true);
 590                                 Assert.Fail ("#4b");
 591                         } catch (ArgumentOutOfRangeException) {
 592                         }
 593
 594                         try {
 595                                 _list1.FindIndex (7, 2, l => true);
 596                                 Assert.Fail ("#5");
 597                         } catch (ArgumentOutOfRangeException) {
 598                         }
 599                 }
 600
 601                 [Test]
 602                 public void FindLastTest ()
 603                 {
 604                         int i = _list1.FindLast (FindMultipleOfFour);
 605                         Assert.AreEqual (40, i);
 606
 607                         i = _list1.FindLast (FindMultipleOfTwelve);
 608                         Assert.AreEqual (default (int), i);
 609                 }
 610
 611                 [Test, ExpectedException (typeof (ArgumentNullException))]
 612                 public void FindLastNullTest ()
 613                 {
 614                         int i = _list1.FindLast (null);
 615                 }
 616
 617                 [Test]
 618                 public void ForEachTest ()
 619                 {
 620                         int i = 0;
 621                         _list1.ForEach (delegate (int j) { i += j; });
 622
 623                         Assert.AreEqual (418, i);
 624                 }
 625
 626                 [Test]
 627                 public void FindLastIndexTest ()
 628                 {
 629                         int i = _list1.FindLastIndex (FindMultipleOfFour);
 630                         Assert.AreEqual (6, i);
 631
 632                         i = _list1.FindLastIndex (5, FindMultipleOfFour);
 633                         Assert.AreEqual (5, i);
 634
 635                         i = _list1.FindIndex (FindMultipleOfTwelve);
 636                         Assert.AreEqual (-1, i);
 637
 638                         Assert.AreEqual (2, _list1.FindLastIndex (2, 3, l => true));
 639                         Assert.AreEqual (2, _list1.FindLastIndex (2, 2, l => true));
 640                         Assert.AreEqual (1, _list1.FindLastIndex (1, 2, l => true));
 641                 }
 642
 643                 [Test]
 644                 public void FindLastIndex_Invalid ()
 645                 {
 646                         try {
 647                                 _list1.FindLastIndex (null);
 648                                 Assert.Fail ("#1");
 649                         } catch (ArgumentNullException) {
 650                         }
 651
 652                         try {
 653                                 _list1.FindLastIndex (-1, l => true);
 654                                 Assert.Fail ("#2");
 655                         } catch (ArgumentOutOfRangeException) {
 656                         }
 657
 658                         try {
 659                                 _list1.FindLastIndex (-1, 0, l => true);
 660                                 Assert.Fail ("#2b");
 661                         } catch (ArgumentOutOfRangeException) {
 662                         }
 663
 664                         try {
 665                                 _list1.FindLastIndex (0, -1, l => true);
 666                                 Assert.Fail ("#3");
 667                         } catch (ArgumentOutOfRangeException) {
 668                         }
 669
 670                         try {
 671                                 _list1.FindLastIndex (100, l => true);
 672                                 Assert.Fail ("#4");
 673                         } catch (ArgumentOutOfRangeException) {
 674                         }
 675
 676                         try {
 677                                 _list1.FindLastIndex (100, 0, l => true);
 678                                 Assert.Fail ("#4b");
 679                         } catch (ArgumentOutOfRangeException) {
 680                         }
 681
 682                         try {
 683                                 _list1.FindLastIndex (2, 4, l => true);
 684                                 Assert.Fail ("#5");
 685                         } catch (ArgumentOutOfRangeException) {
 686                         }
 687                 }
 688
 689                 [Test]
 690                 public void RemoveTest ()
 691                 {
 692                         int count = _list1.Count;
 693                         bool result = _list1.Remove (22);
 694                         Assert.IsTrue (result);
 695                         Assert.AreEqual (count - 1, _list1.Count);
 696
 697                         Assert.AreEqual (-1, _list1.IndexOf (22));
 698
 699                         result = _list1.Remove (0);
 700                         Assert.IsFalse (result);
 701                 }
 702
 703                 [Test]
 704                 public void RemoveAllTest ()
 705                 {
 706                         int count = _list1.Count;
 707                         int removedCount = _list1.RemoveAll (FindMultipleOfFour);
 708                         Assert.AreEqual (4, removedCount);
 709                         Assert.AreEqual (count - 4, _list1.Count);
 710
 711                         removedCount = _list1.RemoveAll (FindMultipleOfTwelve);
 712                         Assert.AreEqual (0, removedCount);
 713                         Assert.AreEqual (count - 4, _list1.Count);
 714                 }
 715
 716                 [Test]
 717                 public void RemoveAtTest ()
 718                 {
 719                         int count = _list1.Count;
 720                         _list1.RemoveAt (0);
 721                         Assert.AreEqual (count - 1, _list1.Count);
 722                         Assert.AreEqual (50, _list1 [0]);
 723                 }
 724
 725                 [Test, ExpectedException (typeof (ArgumentOutOfRangeException))]
 726                 public void RemoveOutOfRangeTest ()
 727                 {
 728                         _list1.RemoveAt (_list1.Count);
 729                 }
 730
 731                 [Test]
 732                 public void RemoveRangeTest ()
 733                 {
 734                         int count = _list1.Count;
 735                         _list1.RemoveRange (1, 2);
 736                         Assert.AreEqual (count - 2, _list1.Count);
 737                         Assert.AreEqual (55, _list1 [0]);
 738                         Assert.AreEqual (80, _list1 [1]);
 739
 740                         _list1.RemoveRange (0, 0);
 741                         Assert.AreEqual (count - 2, _list1.Count);
 742                 }
 743
 744                 [Test]
 745                 public void RemoveRangeFromEmptyListTest ()
 746                 {
 747                         List<int> l = new List<int> ();
 748                         l.RemoveRange (0, 0);
 749                 }
 750
 751                 [Test, ExpectedException (typeof (ArgumentException))]
 752                 public void RemoveRangeOutOfRangeTest ()
 753                 {
 754                         _list1.RemoveRange (1, _list1.Count);
 755                 }
 756
 757                 [Test]
 758                 public void ReverseTest ()
 759                 {
 760                         int count = _list1.Count;
 761                         _list1.Reverse ();
 762                         Assert.AreEqual (count, _list1.Count);
 763
 764                         Assert.AreEqual (63, _list1 [0]);
 765                         Assert.AreEqual (55, _list1 [count - 1]);
 766
 767                         _list1.Reverse (0, 2);
 768
 769                         Assert.AreEqual (40, _list1 [0]);
 770                         Assert.AreEqual (63, _list1 [1]);
 771                 }
 772
 773                 [Test, ExpectedException (typeof (ArgumentException))]
 774                 public void ReverseOutOfRangeTest ()
 775                 {
 776                         _list1.Reverse (1, _list1.Count);
 777                 }
 778
 779                 [Test]
 780                 public void ToArrayTest ()
 781                 {
 782                         int [] copiedContents = _list1.ToArray ();
 783                         Assert.IsFalse (ReferenceEquals (copiedContents, _list1_contents));
 784
 785                         Assert.AreEqual (_list1.Count, copiedContents.Length);
 786                         Assert.AreEqual (_list1 [0], copiedContents [0]);
 787                 }
 788
 789                 [Test]
 790                 public void TrimExcessTest ()
 791                 {
 792                         List <string> l = new List <string> ();
 793                         l.Add ("foo");
 794
 795                         Assert.IsTrue (l.Count < l.Capacity);
 796                         l.TrimExcess ();
 797                         Assert.AreEqual (l.Count, l.Capacity);
 798                 }
 799
 800                 bool IsPositive (int i)
 801                 {
 802                         return i >= 0;
 803                 }
 804
 805                 [Test]
 806                 public void TrueForAllTest ()
 807                 {
 808                         Assert.IsFalse (_list1.TrueForAll (FindMultipleOfFour));
 809                         Assert.IsTrue (_list1.TrueForAll (IsPositive));
 810                 }
 811
 812                 [Test, ExpectedException (typeof (ArgumentNullException))]
 813                 public void TrueForAllNullTest ()
 814                 {
 815                         _list1.TrueForAll (null);
 816                 }
 817
 818                 [Test, ExpectedException (typeof (ArgumentOutOfRangeException))]
 819                 public void CapacityOutOfRangeTest ()
 820                 {
 821                         _list1.Capacity = _list1.Count - 1;
 822                 }
 823
 824                 [Test]
 825                 public void BinarySearch_EmptyList ()
 826                 {
 827                         GenericComparer<int> comparer = new GenericComparer<int> ();
 828                         List<int> l = new List<int> ();
 829                         Assert.AreEqual (-1, l.BinarySearch (0, comparer), "BinarySearch");
 830                         // bug 77030 - the comparer isn't called for an empty array/list
 831                         Assert.IsFalse (comparer.Called, "Called");
 832                 }
 833
 834                 [Test]
 835                 public void BinarySearch2_EmptyList ()
 836                 {
 837                         GenericComparer<int> comparer = new GenericComparer<int> ();
 838                         List<int> l = new List<int> ();
 839                         Assert.AreEqual (-1, l.BinarySearch (0, 0, 0, comparer), "BinarySearch");
 840                         // bug 77030 - the comparer isn't called for an empty array/list
 841                         Assert.IsFalse (comparer.Called, "Called");
 842                 }
 843
 844                 [Test]
 845                 public void AddRange_Bug77019 ()
 846                 {
 847                         List<int> l = new List<int> ();
 848                         Dictionary<string, int> d = new Dictionary<string, int> ();
 849                         l.AddRange (d.Values);
 850                         Assert.AreEqual (0, l.Count, "Count");
 851                 }
 852
 853                 [Test]
 854                 public void VersionCheck_Add ()
 855                 {
 856                         List<int> list = new List<int> ();
 857                         IEnumerator enumerator = list.GetEnumerator ();
 858                         list.Add (5);
 859
 860                         try {
 861                                 enumerator.MoveNext ();
 862                                 Assert.Fail ("#1");
 863                         } catch (InvalidOperationException) {
 864                         }
 865
 866                         try {
 867                                 enumerator.Reset ();
 868                                 Assert.Fail ("#2");
 869                         } catch (InvalidOperationException) {
 870                         }
 871
 872                         enumerator = list.GetEnumerator ();
 873                         enumerator.MoveNext ();
 874                 }
 875
 876                 [Test]
 877                 public void VersionCheck_AddRange ()
 878                 {
 879                         List<int> list = new List<int> ();
 880                         IEnumerator enumerator = list.GetEnumerator ();
 881                         list.AddRange (new int [] { 5, 7 });
 882
 883                         try {
 884                                 enumerator.MoveNext ();
 885                                 Assert.Fail ("#1");
 886                         } catch (InvalidOperationException) {
 887                         }
 888
 889                         try {
 890                                 enumerator.Reset ();
 891                                 Assert.Fail ("#2");
 892                         } catch (InvalidOperationException) {
 893                         }
 894
 895                         enumerator = list.GetEnumerator ();
 896                         enumerator.MoveNext ();
 897                 }
 898
 899                 [Test]
 900                 public void VersionCheck_Clear ()
 901                 {
 902                         List<int> list = new List<int> ();
 903                         IEnumerator enumerator = list.GetEnumerator ();
 904                         list.Clear ();
 905
 906                         try {
 907                                 enumerator.MoveNext ();
 908                                 Assert.Fail ("#1");
 909                         } catch (InvalidOperationException) {
 910                         }
 911
 912                         try {
 913                                 enumerator.Reset ();
 914                                 Assert.Fail ("#2");
 915                         } catch (InvalidOperationException) {
 916                         }
 917
 918                         enumerator = list.GetEnumerator ();
 919                         enumerator.MoveNext ();
 920                 }
 921
 922                 [Test]
 923                 public void VersionCheck_Insert ()
 924                 {
 925                         List<int> list = new List<int> ();
 926                         IEnumerator enumerator = list.GetEnumerator ();
 927                         list.Insert (0, 7);
 928
 929                         try {
 930                                 enumerator.MoveNext ();
 931                                 Assert.Fail ("#1");
 932                         } catch (InvalidOperationException) {
 933                         }
 934
 935                         try {
 936                                 enumerator.Reset ();
 937                                 Assert.Fail ("#2");
 938                         } catch (InvalidOperationException) {
 939                         }
 940
 941                         enumerator = list.GetEnumerator ();
 942                         enumerator.MoveNext ();
 943                 }
 944
 945                 [Test]
 946                 public void VersionCheck_InsertRange ()
 947                 {
 948                         List<int> list = new List<int> ();
 949                         IEnumerator enumerator = list.GetEnumerator ();
 950                         list.InsertRange (0, new int [] { 5, 7 });
 951
 952                         try {
 953                                 enumerator.MoveNext ();
 954                                 Assert.Fail ("#1");
 955                         } catch (InvalidOperationException) {
 956                         }
 957
 958                         try {
 959                                 enumerator.Reset ();
 960                                 Assert.Fail ("#2");
 961                         } catch (InvalidOperationException) {
 962                         }
 963
 964                         enumerator = list.GetEnumerator ();
 965                         enumerator.MoveNext ();
 966                 }
 967
 968                 [Test]
 969                 public void VersionCheck_Remove ()
 970                 {
 971                         List<int> list = new List<int> ();
 972                         list.Add (5);
 973                         IEnumerator enumerator = list.GetEnumerator ();
 974                         // version number is not incremented if item does not exist in list
 975                         list.Remove (7);
 976                         enumerator.MoveNext ();
 977                         list.Remove (5);
 978
 979                         try {
 980                                 enumerator.MoveNext ();
 981                                 Assert.Fail ("#1");
 982                         } catch (InvalidOperationException) {
 983                         }
 984
 985                         try {
 986                                 enumerator.Reset ();
 987                                 Assert.Fail ("#2");
 988                         } catch (InvalidOperationException) {
 989                         }
 990
 991                         enumerator = list.GetEnumerator ();
 992                         enumerator.MoveNext ();
 993                 }
 994
 995                 [Test]
 996                 public void VersionCheck_RemoveAll ()
 997                 {
 998                         List<int> list = new List<int> ();
 999                         list.Add (5);
1000                         IEnumerator enumerator = list.GetEnumerator ();
1001                         // version is not incremented if there are no items to remove
1002                         list.RemoveAll (FindMultipleOfFour);
1003                         enumerator.MoveNext ();
1004                         list.Add (4);
1005
1006                         enumerator = list.GetEnumerator ();
1007                         list.RemoveAll (FindMultipleOfFour);
1008
1009                         try {
1010                                 enumerator.MoveNext ();
1011                                 Assert.Fail ("#1");
1012                         } catch (InvalidOperationException) {
1013                         }
1014
1015                         try {
1016                                 enumerator.Reset ();
1017                                 Assert.Fail ("#2");
1018                         } catch (InvalidOperationException) {
1019                         }
1020
1021                         enumerator = list.GetEnumerator ();
1022                         enumerator.MoveNext ();
1023                 }
1024
1025                 [Test]
1026                 public void VersionCheck_RemoveAt ()
1027                 {
1028                         List<int> list = new List<int> ();
1029                         list.Add (5);
1030                         IEnumerator enumerator = list.GetEnumerator ();
1031                         list.RemoveAt (0);
1032
1033                         try {
1034                                 enumerator.MoveNext ();
1035                                 Assert.Fail ("#1");
1036                         } catch (InvalidOperationException) {
1037                         }
1038
1039                         try {
1040                                 enumerator.Reset ();
1041                                 Assert.Fail ("#2");
1042                         } catch (InvalidOperationException) {
1043                         }
1044
1045                         enumerator = list.GetEnumerator ();
1046                         enumerator.MoveNext ();
1047                 }
1048
1049                 [Test]
1050                 public void VersionCheck_RemoveRange ()
1051                 {
1052                         List<int> list = new List<int> ();
1053                         list.Add (5);
1054                         IEnumerator enumerator = list.GetEnumerator ();
1055                         // version is not incremented if count is zero
1056                         list.RemoveRange (0, 0);
1057                         enumerator.MoveNext ();
1058                         enumerator.Reset ();
1059                         list.RemoveRange (0, 1);
1060
1061                         try {
1062                                 enumerator.MoveNext ();
1063                                 Assert.Fail ("#1");
1064                         } catch (InvalidOperationException) {
1065                         }
1066
1067                         try {
1068                                 enumerator.Reset ();
1069                                 Assert.Fail ("#2");
1070                         } catch (InvalidOperationException) {
1071                         }
1072
1073                         enumerator = list.GetEnumerator ();
1074                         enumerator.MoveNext ();
1075                 }
1076
1077                 [Test, ExpectedException (typeof (InvalidOperationException))] // #699182
1078                 public void VersionCheck_Indexer ()
1079                 {
1080                         var list = new List<int> () { 0, 2, 3 };
1081                         var enumerator = list.GetEnumerator ();
1082
1083                         list [0] = 1;
1084
1085                         enumerator.MoveNext ();
1086                 }
1087
1088                 [Test]
1089                 public void VersionCheck_Reverse ()
1090                 {
1091                         List<int> list = new List<int> ();
1092                         IEnumerator enumerator = list.GetEnumerator ();
1093                         list.Reverse ();
1094
1095                         try {
1096                                 enumerator.MoveNext ();
1097                                 Assert.Fail ("#A1");
1098                         } catch (InvalidOperationException) {
1099                         }
1100
1101                         try {
1102                                 enumerator.Reset ();
1103                                 Assert.Fail ("#A2");
1104                         } catch (InvalidOperationException) {
1105                         }
1106
1107                         enumerator = list.GetEnumerator ();
1108                         list.Reverse (0, 0);
1109
1110                         try {
1111                                 enumerator.MoveNext ();
1112                                 Assert.Fail ("#B1");
1113                         } catch (InvalidOperationException) {
1114                         }
1115
1116                         try {
1117                                 enumerator.Reset ();
1118                                 Assert.Fail ("#B2");
1119                         } catch (InvalidOperationException) {
1120                         }
1121
1122                         enumerator = list.GetEnumerator ();
1123                         enumerator.MoveNext ();
1124                 }
1125
1126                 class SortTestComparer: IComparer<string> {
1127
1128                         public int Compare (string s1, string s2)
1129                         {
1130                                 return String.Compare (s1, s2);
1131                         }
1132                 }
1133
1134                 [Test]
1135                 public void Sort_Bug76361 ()
1136                 {
1137                         SortTestComparer comparer = new SortTestComparer ();
1138                         List<string> l = new List<string> ();
1139                         l.Add ("foo");
1140                         l.Add ("bar");
1141                         l.Sort (comparer);
1142                         Assert.AreEqual ("bar", l[0], "0");
1143                         Assert.AreEqual ("foo", l[1], "1");
1144                         Assert.AreEqual (2, l.Count, "Count");
1145                 }
1146
1147                 // for bug #77039 test case
1148                 class GenericIComparable: IComparable<GenericIComparable> {
1149                         private int _NumberToSortOn;
1150
1151                         public int NumberToSortOn {
1152                                 get { return _NumberToSortOn; }
1153                                 set { _NumberToSortOn = value; }
1154                         }
1155
1156                         public GenericIComparable (int val)
1157                         {
1158                                 _NumberToSortOn = val;
1159                         }
1160
1161                         public int CompareTo (GenericIComparable other)
1162                         {
1163                                 return NumberToSortOn.CompareTo (other.NumberToSortOn);
1164                         }
1165                 }
1166
1167                 [Test]
1168                 public void Sort_GenericIComparable_Bug77039 ()
1169                 {
1170                         List<GenericIComparable> l = new List<GenericIComparable> ();
1171                         l.Add (new GenericIComparable (2));
1172                         l.Add (new GenericIComparable (1));
1173                         l.Add (new GenericIComparable (3));
1174                         l.Sort ();
1175                         Assert.AreEqual (1, l[0].NumberToSortOn, "0");
1176                         Assert.AreEqual (2, l[1].NumberToSortOn, "1");
1177                         Assert.AreEqual (3, l[2].NumberToSortOn, "2");
1178                 }
1179
1180                 class NonGenericIComparable: IComparable {
1181                         private int _NumberToSortOn;
1182
1183                         public int NumberToSortOn {
1184                                 get { return _NumberToSortOn; }
1185                                 set { _NumberToSortOn = value; }
1186                         }
1187
1188                         public NonGenericIComparable (int val)
1189                         {
1190                                 _NumberToSortOn = val;
1191                         }
1192
1193                         public int CompareTo (object obj)
1194                         {
1195                                 return NumberToSortOn.CompareTo ((obj as NonGenericIComparable).NumberToSortOn);
1196                         }
1197                 }
1198
1199                 [Test]
1200                 public void Sort_NonGenericIComparable ()
1201                 {
1202                         List<NonGenericIComparable> l = new List<NonGenericIComparable> ();
1203                         l.Add (new NonGenericIComparable (2));
1204                         l.Add (new NonGenericIComparable (1));
1205                         l.Add (new NonGenericIComparable (3));
1206                         l.Sort ();
1207                         Assert.AreEqual (1, l[0].NumberToSortOn, "0");
1208                         Assert.AreEqual (2, l[1].NumberToSortOn, "1");
1209                         Assert.AreEqual (3, l[2].NumberToSortOn, "2");
1210                 }
1211
1212                 class NonComparable {
1213                 }
1214
1215                 [Test]
1216                 public void Sort_GenericNonIComparable ()
1217                 {
1218                         List<NonComparable> l = new List<NonComparable> ();
1219                         l.Sort ();
1220                         // no element -> no sort -> no exception
1221                         l.Add (new NonComparable ());
1222                         l.Sort ();
1223                         // one element -> no sort -> no exception
1224                 }
1225
1226                 [Test]
1227                 [ExpectedException (typeof (InvalidOperationException))]
1228                 public void Sort_GenericNonIComparable_2 ()
1229                 {
1230                         List<NonComparable> l = new List<NonComparable> ();
1231                         l.Add (new NonComparable ());
1232                         l.Add (new NonComparable ());
1233                         l.Sort ();
1234                         // two element -> sort -> exception!
1235                 }
1236
1237                 [Test]
1238                 public void IList_Contains_InvalidType()
1239                 {
1240                         List<string> list = new List<string>();
1241                         list.Add("foo");
1242                         Assert.IsFalse (((IList)list).Contains(new object()));
1243
1244                         Assert.IsFalse (((IList)_list1).Contains(null));
1245                 }
1246
1247                 [Test]
1248                 public void IList_IndexOf_InvalidType()
1249                 {
1250                         List<string> list = new List<string>();
1251                         list.Add("foo");
1252                         Assert.AreEqual (-1, ((IList)list).IndexOf(new object()));
1253
1254                         Assert.AreEqual (-1, ((IList)_list1).IndexOf(null));
1255                 }
1256
1257                 // for bug #77277 test case
1258                 [Test]
1259                 public void Test_ContainsAndIndexOf_EquatableItem ()
1260                 {
1261                         List<EquatableClass> list = new List<EquatableClass> ();
1262                         EquatableClass item0 = new EquatableClass (0);
1263                         EquatableClass item1 = new EquatableClass (1);
1264
1265                         list.Add (item0);
1266                         list.Add (item1);
1267                         list.Add (item0);
1268
1269                         Assert.AreEqual (true, list.Contains (item0), "#0");
1270                         Assert.AreEqual (true, list.Contains (new EquatableClass (0)), "#1");
1271                         Assert.AreEqual (0, list.IndexOf (item0), "#2");
1272                         Assert.AreEqual (0, list.IndexOf (new EquatableClass (0)), "#3");
1273                         Assert.AreEqual (2, list.LastIndexOf (item0), "#4");
1274                         Assert.AreEqual (2, list.LastIndexOf (new EquatableClass (0)), "#5");
1275                 }
1276
1277                 // for bug #81387 test case
1278                 [Test]
1279                 public void Test_Contains_After_Remove ()
1280                 {
1281                         List<int> list = new List<int> ();
1282             list.Add (2);
1283
1284             list.Remove (2);
1285
1286                         Assert.AreEqual (false, list.Contains (2), "#0");
1287                 }
1288
1289                 [Test]
1290                 [ExpectedException (typeof (ArgumentOutOfRangeException))]
1291                 public void SetItem_OutOfRange()
1292                 {
1293                         List<string> list = new List<string>();
1294                         list[0] = "foo";
1295                 }
1296
1297                 [Test]
1298                 [ExpectedException (typeof (ArgumentOutOfRangeException))]
1299                 public void SetItem_IList_OutOfRange()
1300                 {
1301                         IList<string> list = new List<string>();
1302                         list[0] = "foo";
1303                 }
1304
1305                 public class EquatableClass : IEquatable<EquatableClass>
1306                 {
1307                         int _x;
1308                         public EquatableClass (int x)
1309                         {
1310                                 _x = x;
1311                         }
1312
1313                         public bool Equals (EquatableClass other)
1314                         {
1315                                 return this._x == other._x;
1316                         }
1317                 }
1318
1319                 delegate void D ();
1320                 bool Throws (D d)
1321                 {
1322                         try {
1323                                 d ();
1324                                 return false;
1325                         } catch {
1326                                 return true;
1327                         }
1328                 }
1329
1330                 [Test]
1331                 // based on #491858, #517415
1332                 public void Enumerator_Current ()
1333                 {
1334                         var e1 = new List<int>.Enumerator ();
1335                         Assert.IsFalse (Throws (delegate { var x = e1.Current; }));
1336
1337                         var d = new List<int> ();
1338                         var e2 = d.GetEnumerator ();
1339                         Assert.IsFalse (Throws (delegate { var x = e2.Current; }));
1340                         e2.MoveNext ();
1341                         Assert.IsFalse (Throws (delegate { var x = e2.Current; }));
1342                         e2.Dispose ();
1343                         Assert.IsFalse (Throws (delegate { var x = e2.Current; }));
1344
1345                         var e3 = ((IEnumerable<int>) d).GetEnumerator ();
1346                         Assert.IsFalse (Throws (delegate { var x = e3.Current; }));
1347                         e3.MoveNext ();
1348                         Assert.IsFalse (Throws (delegate { var x = e3.Current; }));
1349                         e3.Dispose ();
1350                         Assert.IsFalse (Throws (delegate { var x = e3.Current; }));
1351
1352                         var e4 = ((IEnumerable) d).GetEnumerator ();
1353                         Assert.IsTrue (Throws (delegate { var x = e4.Current; }));
1354                         e4.MoveNext ();
1355                         Assert.IsTrue (Throws (delegate { var x = e4.Current; }));
1356                         ((IDisposable) e4).Dispose ();
1357                         Assert.IsTrue (Throws (delegate { var x = e4.Current; }));
1358                 }
1359
1360                 [Test]
1361                 public void Enumerator_Reset ()
1362                 {
1363                         var l = new List<int> () {
1364                                 4
1365                         };
1366
1367                         IEnumerator<int> e = l.GetEnumerator ();
1368                         Assert.IsTrue (e.MoveNext (), "#1");
1369                         Assert.AreEqual (4, e.Current, "#2");
1370                         e.Reset ();
1371                         Assert.AreEqual (0, e.Current, "#3");
1372                 }
1373
1374                 [Test] //bug #672907
1375                 public void ICollectionCopyToExceptions ()
1376                 {
1377                         var l = new List <int> ();
1378                         ICollection x = l;
1379                         try {
1380                                 x.CopyTo (null, 0);
1381                                 Assert.Fail ("#1");
1382                         } catch (Exception e) {
1383                                 Assert.IsTrue (e is ArgumentNullException, "#2");
1384                         }
1385
1386                         try {
1387                                 x.CopyTo (new int [10], -1);
1388                                 Assert.Fail ("#3");
1389                         } catch (Exception e) {
1390                                 Assert.IsTrue (e is ArgumentOutOfRangeException, "#4");
1391                         }
1392
1393                         try {
1394                                 x.CopyTo (new int [10, 1], 0);
1395                                 Assert.Fail ("#5");
1396                         } catch (Exception e) {
1397                                 Assert.IsTrue (e is ArgumentException, "#6");
1398                         }
1399
1400                         try {
1401                                 x.CopyTo (Array.CreateInstance (typeof (int), new int [] { 10 }, new int[] { 1 }), 0);
1402                                 Assert.Fail ("#7");
1403                         } catch (Exception e) {
1404                                 Assert.IsTrue (e is ArgumentException, "#8");
1405                         }
1406
1407                         l.Add (10); l.Add (20);
1408                         try {
1409                                 x.CopyTo (new int [1], 0);
1410                                 Assert.Fail ("#9");
1411                         } catch (Exception e) {
1412                                 Assert.IsTrue (e is ArgumentException, "#10");
1413                         }
1414                 }
1415
1416                 [Test]
1417                 public void LastIndexOfEmpty_2558 () {
1418                         var l = new List<int> ();
1419                         Assert.AreEqual (-1, l.IndexOf (-1));
1420                 }
1421
1422
1423 #region Enumerator mutability
1424
1425                 class Bar
1426                 {
1427                 }
1428
1429                 class Foo : IEnumerable<Bar>
1430                 {
1431                         Baz enumerator;
1432
1433                         public Foo ()
1434                         {
1435                                 enumerator = new Baz ();
1436                         }
1437
1438                         public IEnumerator<Bar> GetEnumerator ()
1439                         {
1440                                 return enumerator;
1441                         }
1442
1443                         IEnumerator IEnumerable.GetEnumerator ()
1444                         {
1445                                 return enumerator;
1446                         }
1447                 }
1448
1449                 class Baz : IEnumerator<Bar>
1450                 {
1451                         public bool DisposeWasCalled = false;
1452
1453                         public void Dispose ()
1454                         {
1455                                 DisposeWasCalled = true;
1456                         }
1457
1458                         public bool MoveNext ()
1459                         {
1460                                 return false; //assume empty collection
1461                         }
1462
1463                         public void Reset ()
1464                         {
1465                         }
1466
1467                         public Bar Current
1468                         {
1469                                 get { return null; }
1470                         }
1471
1472                         object IEnumerator.Current
1473                         {
1474                                 get { return Current; }
1475                         }
1476                 }
1477
1478                 [Test]
1479                 public void PremiseAboutDisposeBeingCalledWhenLooping ()
1480                 {
1481                         Foo enumerable = new Foo ();
1482                         Baz enumerator = enumerable.GetEnumerator () as Baz;
1483                         Assert.IsNotNull (enumerator);
1484                         Assert.AreEqual (false, enumerator.DisposeWasCalled);
1485                         foreach (var element in enumerable) ; //sic
1486                         Assert.AreEqual (true, enumerator.DisposeWasCalled);
1487                 }
1488
1489                 [Test]
1490                 public void TwoEnumeratorsOfTwoDifferentListsAreDifferent ()
1491                 {
1492                         var twoThree = new List<int> { 2, 3 };
1493                         var oneTwo = new List<int> { 2, 4 };
1494                         Assert.IsFalse (oneTwo.GetEnumerator ().Equals (twoThree.GetEnumerator ()));
1495                 }
1496
1497                 [Test]
1498                 public void TwoEnumeratorsOfTwoDifferentListsWithSameElementsAreDifferent ()
1499                 {
1500                         var twoThree = new List<int> { 2, 3 };
1501                         var anotherTwoThree = new List<int> { 2, 3 };
1502                         Assert.IsFalse(twoThree.GetEnumerator ().Equals (anotherTwoThree.GetEnumerator ()));
1503                 }
1504
1505                 [Test]
1506                 public void EnumeratorIsSameInSameListAfterSubsequentCalls ()
1507                 {
1508                         var enumerable = new List<Bar> ();
1509                         var enumerator = enumerable.GetEnumerator ();
1510                         var enumerator2 = enumerable.GetEnumerator ();
1511
1512                         Assert.IsFalse (ReferenceEquals (enumerator2, enumerator)); //because they are value-types
1513
1514                         Assert.IsTrue (enumerator2.Equals (enumerator));
1515                 }
1516
1517
1518                 [Test] // was bug in Mono 2.10.9
1519                 public void EnumeratorIsStillSameInSubsequentCallsEvenHavingADisposalInBetween ()
1520                 {
1521                         var enumerable = new List<Bar> ();
1522                         var enumerator = enumerable.GetEnumerator ();
1523                         enumerator.Dispose ();
1524                         var enumerator2 = enumerable.GetEnumerator ();
1525
1526                         Assert.IsFalse (ReferenceEquals (enumerator2, enumerator)); //because they are value-types
1527
1528                         Assert.IsTrue (enumerator2.Equals (enumerator));
1529                 }
1530
1531                 [Test]
1532                 public void EnumeratorIsObviouslyDifferentAfterListChanges ()
1533                 {
1534                         var enumerable = new List<Bar> ();
1535                         var enumerator = enumerable.GetEnumerator ();
1536                         enumerable.Add (new Bar ());
1537                         var enumerator2 = enumerable.GetEnumerator ();
1538
1539                         Assert.IsFalse (ReferenceEquals (enumerator2, enumerator)); //because they are value-types
1540
1541                         Assert.IsFalse (enumerator2.Equals (enumerator));
1542                 }
1543
1544                 [Test] // was bug in Mono 2.10.9
1545                 public void DotNetDoesntThrowObjectDisposedExceptionAfterSubsequentDisposes()
1546                 {
1547                         var enumerable = new List<Bar> ();
1548                         var enumerator = enumerable.GetEnumerator ();
1549                         Assert.AreEqual (false, enumerator.MoveNext ());
1550                         enumerator.Dispose();
1551                         Assert.AreEqual (false, enumerator.MoveNext ());
1552                 }
1553 #endregion
1554
1555
1556         }
1557 }
1558