mcs/class/corlib/Test/System.IO/BufferedStreamTest.cs

   1 //
   2 // System.IO.BufferedStream Unit Tests
   3 //
   4 // Authors:
   5 //      Ville Palo (vi64pa@kolumbus.fi)
   6 //      Sebastien Pouliot  <sebastien@ximian.com>
   7 //
   8 // (C) 2003 Ville Palo
   9 // Copyright (C) 2004 Novell (http://www.novell.com)
  10 //
  11
  12 using NUnit.Framework;
  13 using System.IO;
  14 using System.Text;
  15 using System;
  16
  17 namespace MonoTests.System.IO {
  18
  19 [TestFixture]
  20 public class BufferedStreamTest {
  21
  22         private MemoryStream mem;
  23
  24         [SetUp]
  25         protected void SetUp ()
  26         {
  27                 mem = new MemoryStream ();
  28         }
  29
  30         [TearDown]
  31         protected void TearDown ()
  32         {
  33                 //Some tests might mess with mem, so let's check it first
  34                 if (mem != null)
  35                         mem.Close ();
  36         }
  37
  38
  39         [Test]
  40         public void Ctor ()
  41         {
  42                 MemoryStream str = new MemoryStream ();
  43                 str.Write (new byte [] {1, 2, 3, 4, 5, 6}, 0, 6);
  44                 BufferedStream stream = new BufferedStream (str);
  45
  46                 Assert.AreEqual (true, stream.CanRead, "test#01");
  47                 Assert.AreEqual (true, stream.CanSeek, "test#02");
  48                 Assert.AreEqual (true, stream.CanWrite, "test#03");
  49                 Assert.AreEqual (6, stream.Length, "test#04");
  50                 Assert.AreEqual (6, stream.Position, "test#05");
  51
  52                 string path = Path.GetTempFileName ();
  53                 if (File.Exists (path))
  54                         File.Delete (path);
  55
  56                 FileStream file = new FileStream (path, FileMode.OpenOrCreate, FileAccess.Write);
  57                 stream = new BufferedStream (file);
  58                 Assert.AreEqual (false, stream.CanRead, "test#06");
  59                 Assert.AreEqual (true, stream.CanSeek, "test#07");
  60                 Assert.AreEqual (true, stream.CanWrite, "test#08");
  61                 Assert.AreEqual (0, stream.Length, "test#09");
  62                 Assert.AreEqual (0, stream.Position, "test#10");
  63                 file.Close ();
  64
  65                 if (File.Exists (path))
  66                         File.Delete (path);
  67
  68                 file = new FileStream (path, FileMode.OpenOrCreate, FileAccess.Write);
  69                 stream = new BufferedStream (file, 12);
  70                 Assert.AreEqual (false, stream.CanRead, "test#11");
  71                 Assert.AreEqual (true, stream.CanSeek, "test#12");
  72                 Assert.AreEqual (true, stream.CanWrite, "test#13");
  73                 Assert.AreEqual (0, stream.Length, "test#14");
  74                 Assert.AreEqual (0, stream.Position, "test#15");
  75
  76                 file.Close ();
  77                 if (File.Exists (path))
  78                         File.Delete (path);
  79         }
  80
  81         /// <summary>
  82         /// Throws an exception if stream is null
  83         /// </summary>
  84         [Test]
  85         [ExpectedException(typeof(ArgumentNullException))]
  86         public void CtorNullExceptionStream ()
  87         {
  88                 BufferedStream stream = new BufferedStream (null);
  89         }
  90
  91         /// <summary>
  92         /// Throws an exception if stream is null
  93         /// </summary>
  94         [Test]
  95         [ExpectedException(typeof(ArgumentNullException))]
  96         public void CtorNullExceptionStream1 ()
  97         {
  98                 BufferedStream stream = new BufferedStream (null, 12);
  99         }
 100
 101         /// <summary>
 102         /// Throws an exception if stream is null
 103         /// </summary>
 104         [Test]
 105         [ExpectedException(typeof(ArgumentOutOfRangeException))]
 106         public void CtorOutOfRangeExceptionStream1 ()
 107         {
 108                 MemoryStream str = new MemoryStream ();
 109                 BufferedStream stream = new BufferedStream (str, -12);
 110         }
 111
 112
 113         [Test]
 114         [ExpectedException(typeof(ObjectDisposedException))]
 115         public void CtorOutOfRangeException2 ()
 116         {
 117                 MemoryStream str = new MemoryStream ();
 118                 str.Close ();
 119                 BufferedStream stream = new BufferedStream (str);
 120         }
 121
 122         [Test]
 123         public void Close1 ()
 124         {
 125                 BufferedStream stream = new BufferedStream (mem);
 126                 stream.Close ();
 127                 stream.Close ();
 128         }
 129
 130         [Test]
 131         public void Close2 ()
 132         {
 133                 BufferedStream stream = new BufferedStream (mem);
 134                 stream.Close ();
 135                 Assert.AreEqual (false, stream.CanRead, "test#01");
 136                 Assert.AreEqual (false, stream.CanSeek, "test#02");
 137                 Assert.AreEqual (false, stream.CanWrite, "test#03");
 138         }
 139
 140         [Test]
 141         [ExpectedException(typeof(ObjectDisposedException))]
 142         public void Close3 ()
 143         {
 144                 BufferedStream stream = new BufferedStream (mem);
 145                 stream.Close ();
 146                 long l = stream.Position;
 147         }
 148
 149         [Test]
 150         [ExpectedException(typeof(ObjectDisposedException))]
 151         public void Close4 ()
 152         {
 153                 BufferedStream stream = new BufferedStream (mem);
 154                 stream.Close ();
 155                 long l = stream.Length;
 156         }
 157
 158         [Test]
 159         [ExpectedException(typeof(ObjectDisposedException))]
 160         public void Close5 ()
 161         {
 162                 BufferedStream stream = new BufferedStream (mem);
 163                 stream.Close ();
 164                 stream.WriteByte (1);
 165         }
 166
 167         [Test]
 168         [ExpectedException(typeof(ObjectDisposedException))]
 169         public void Close6 ()
 170         {
 171                 BufferedStream stream = new BufferedStream (mem);
 172                 stream.Close ();
 173                 stream.ReadByte ();
 174         }
 175
 176         [Test]
 177         [ExpectedException(typeof(NotSupportedException))]
 178         public void Close7 ()
 179         {
 180                 BufferedStream stream = new BufferedStream (mem);
 181                 mem.Close ();
 182                 stream.WriteByte (1);
 183         }
 184
 185         [Test]
 186         public void Read ()
 187         {
 188                 mem.Write (new byte [] {0, 1, 2, 3, 4, 5, 6, 7}, 0, 8);
 189                 BufferedStream stream = new BufferedStream (mem);
 190
 191                 byte [] bytes = new byte [10];
 192                 stream.Read (bytes, 0, 3);
 193                 Assert.AreEqual (0, bytes [0], "test#01");
 194                 Assert.AreEqual (0, bytes [1], "test#02");
 195                 Assert.AreEqual (0, bytes [2], "test#03");
 196
 197                 stream.Seek (0, SeekOrigin.Begin);
 198                 stream.Read (bytes, 0, 3);
 199                 Assert.AreEqual (0, bytes [0], "test#04");
 200                 Assert.AreEqual (1, bytes [1], "test#05");
 201                 Assert.AreEqual (2, bytes [2], "test#06");
 202                 Assert.AreEqual (0, bytes [0], "test#07");
 203
 204                 stream.Read (bytes, 5, 3);
 205                 Assert.AreEqual (3, bytes [5], "test#08");
 206                 Assert.AreEqual (4, bytes [6], "test#09");
 207                 Assert.AreEqual (5, bytes [7], "test#10");
 208                 Assert.AreEqual (0, bytes [8], "test#11");
 209
 210                 stream.Read (bytes, 0, 10);
 211                 Assert.AreEqual (3, bytes [5], "test#12");
 212                 Assert.AreEqual (4, bytes [6], "test#13");
 213                 Assert.AreEqual (5, bytes [7], "test#14");
 214                 Assert.AreEqual (0, bytes [9], "test#15");
 215         }
 216
 217         [Test]
 218         [ExpectedException(typeof(ArgumentException))]
 219         public void ReadException ()
 220         {
 221                 mem.Write (new byte [] {0, 1, 2, 3, 4, 5, 6, 7}, 0, 8);
 222                 BufferedStream stream = new BufferedStream (mem);
 223
 224                 byte [] bytes = new byte [10];
 225                 stream.Read (bytes, 0, 30);
 226         }
 227
 228         [Test]
 229         [ExpectedException(typeof(ArgumentNullException))]
 230         public void Read_Null ()
 231         {
 232                 BufferedStream stream = new BufferedStream (mem);
 233                 stream.Read (null, 0, 0);
 234         }
 235
 236         [Test]
 237         [ExpectedException(typeof(NotSupportedException))]
 238         public void Read_CantRead ()
 239         {
 240                 WriteOnlyStream wo = new WriteOnlyStream ();
 241                 BufferedStream stream = new BufferedStream (wo);
 242                 stream.Read (new byte [1], 0, 1);
 243         }
 244
 245         [Test]
 246         [ExpectedException(typeof(ArgumentOutOfRangeException))]
 247         public void Read_OffsetNegative ()
 248         {
 249                 BufferedStream stream = new BufferedStream (mem);
 250                 stream.Read (new byte [1], -1, 1);
 251         }
 252
 253         [Test]
 254         [ExpectedException(typeof(ArgumentException))]
 255         public void Read_OffsetOverflow ()
 256         {
 257                 BufferedStream stream = new BufferedStream (mem);
 258                 stream.Read (new byte [1], Int32.MaxValue, 1);
 259         }
 260
 261         [Test]
 262         [ExpectedException(typeof(ArgumentOutOfRangeException))]
 263         public void Read_CountNegative ()
 264         {
 265                 BufferedStream stream = new BufferedStream (mem);
 266                 stream.Read (new byte [1], 1, -1);
 267         }
 268
 269         [Test]
 270         [ExpectedException(typeof(ArgumentException))]
 271         public void Read_CountOverflow ()
 272         {
 273                 BufferedStream stream = new BufferedStream (mem);
 274                 stream.Read (new byte [1], 1, Int32.MaxValue);
 275         }
 276
 277         [Test]
 278         public void ReadByte ()
 279         {
 280                 mem.Write (new byte [] {0, 1, 2, 3, 4, 5, 6, 7}, 0, 8);
 281                 BufferedStream stream = new BufferedStream (mem);
 282
 283                 Assert.AreEqual (-1, stream.ReadByte (), "test#01");
 284                 Assert.AreEqual (-1, stream.ReadByte (), "test#02");
 285                 Assert.AreEqual (-1, stream.ReadByte (), "test#03");
 286
 287                 stream.Seek (0, SeekOrigin.Begin);
 288                 Assert.AreEqual (0, stream.ReadByte (), "test#04");
 289                 Assert.AreEqual (1, stream.ReadByte (), "test#05");
 290                 Assert.AreEqual (2, stream.ReadByte (), "test#06");
 291                 Assert.AreEqual (3, stream.ReadByte (), "test#07");
 292         }
 293
 294         [Test]
 295         public void Write ()
 296         {
 297                 BufferedStream stream = new BufferedStream (mem);
 298
 299                 stream.Write (new byte [] {0, 1, 2, 3, 4}, 0, 4);
 300                 Assert.AreEqual (4, stream.Length, "test#01");
 301                 byte [] bytes = mem.GetBuffer ();
 302                 Assert.AreEqual (0, bytes [0], "test#02");
 303                 Assert.AreEqual (1, bytes [1], "test#03");
 304                 Assert.AreEqual (2, bytes [2], "test#04");
 305                 Assert.AreEqual (3, bytes [3], "test#05");
 306
 307                 bytes = new byte [] {1, 4, 3};
 308                 stream.Write (bytes, 0, 3);
 309                 stream.Flush ();
 310                 bytes = mem.GetBuffer ();
 311                 Assert.AreEqual (0, bytes [0], "test#06");
 312                 Assert.AreEqual (1, bytes [1], "test#07");
 313                 Assert.AreEqual (2, bytes [2], "test#08");
 314                 Assert.AreEqual (3, bytes [3], "test#09");
 315                 Assert.AreEqual (1, bytes [4], "test#10");
 316                 Assert.AreEqual (4, bytes [5], "test#11");
 317                 Assert.AreEqual (3, bytes [6], "test#10");
 318                 Assert.AreEqual (0, bytes [7], "test#11");
 319                 Assert.AreEqual (7, stream.Length, "test#12");
 320         }
 321
 322         [Test]
 323         [ExpectedException(typeof (ArgumentException))]
 324         public void WriteException ()
 325         {
 326                 BufferedStream stream = new BufferedStream (mem);
 327                 stream.Write (new byte [] {0,1,2,3}, 0, 10);
 328         }
 329
 330         [Test]
 331         [ExpectedException(typeof(ArgumentNullException))]
 332         public void Write_Null ()
 333         {
 334                 BufferedStream stream = new BufferedStream (mem);
 335                 stream.Write (null, 0, 0);
 336         }
 337
 338         [Test]
 339         [ExpectedException(typeof(NotSupportedException))]
 340         public void Write_CantWrite ()
 341         {
 342                 ReadOnlyStream ro = new ReadOnlyStream ();
 343                 BufferedStream stream = new BufferedStream (ro);
 344                 stream.Write (new byte [1], 0, 1);
 345         }
 346
 347         [Test]
 348         [ExpectedException(typeof(ArgumentOutOfRangeException))]
 349         public void Write_OffsetNegative ()
 350         {
 351                 BufferedStream stream = new BufferedStream (mem);
 352                 stream.Write (new byte [1], -1, 1);
 353         }
 354
 355         [Test]
 356         [ExpectedException(typeof(ArgumentException))]
 357         public void Write_OffsetOverflow ()
 358         {
 359                 BufferedStream stream = new BufferedStream (mem);
 360                 stream.Write (new byte [1], Int32.MaxValue, 1);
 361         }
 362
 363         [Test]
 364         [ExpectedException(typeof(ArgumentOutOfRangeException))]
 365         public void Write_CountNegative ()
 366         {
 367                 BufferedStream stream = new BufferedStream (mem);
 368                 stream.Write (new byte [1], 1, -1);
 369         }
 370
 371         [Test]
 372         [ExpectedException(typeof(ArgumentException))]
 373         public void Write_CountOverflow ()
 374         {
 375                 BufferedStream stream = new BufferedStream (mem);
 376                 stream.Write (new byte [1], 1, Int32.MaxValue);
 377         }
 378
 379         [Test]
 380         public void WriteByte ()
 381         {
 382                 BufferedStream stream = new BufferedStream (mem);
 383                 stream.WriteByte (1);
 384                 stream.WriteByte (2);
 385                 stream.WriteByte (3);
 386                 stream.Flush ();
 387                 Assert.AreEqual (256, mem.GetBuffer ().Length, "test#01");
 388                 Assert.AreEqual (3, stream.Length, "test#02");
 389                 Assert.AreEqual (1, mem.GetBuffer () [0], "test#03");
 390                 Assert.AreEqual (2, mem.GetBuffer () [1], "test#04");
 391                 Assert.AreEqual (3, mem.GetBuffer () [2], "test#05");
 392         }
 393
 394         [Test]
 395         public void Flush ()
 396         {
 397                 BufferedStream stream = new BufferedStream (mem);
 398                 stream.WriteByte (1);
 399                 stream.WriteByte (2);
 400
 401                 byte [] bytes = mem.GetBuffer ();
 402                 Assert.AreEqual (0, bytes.Length, "test#01");
 403                 stream.Flush ();
 404
 405                 bytes = mem.GetBuffer ();
 406                 Assert.AreEqual (256, bytes.Length, "test#02");
 407                 Assert.AreEqual (1, bytes [0], "test#03");
 408                 Assert.AreEqual (2, bytes [1], "test#04");
 409                 mem.Close ();
 410                 mem = new MemoryStream ();
 411                 bytes = new byte [] {0, 1, 2, 3, 4, 5};
 412                 stream = new BufferedStream (mem);
 413                 stream.Write (bytes, 0, 2);
 414                 Assert.AreEqual (2, stream.Length, "test#05");
 415                 bytes = mem.GetBuffer ();
 416                 Assert.AreEqual (256, bytes.Length, "test#06");
 417
 418                 Assert.AreEqual (0, bytes [0], "test#07");
 419                 Assert.AreEqual (1, bytes [1], "test#08");
 420
 421                 stream.Write (bytes, 0, 2);
 422
 423                 bytes = mem.GetBuffer ();
 424                 Assert.AreEqual (0, bytes [0], "test#09");
 425                 Assert.AreEqual (1, bytes [1], "test#10");
 426                 Assert.AreEqual (0, bytes [2], "test#11");
 427                 Assert.AreEqual (0, bytes [3], "test#12");
 428                 stream.Flush ();
 429                 bytes = mem.GetBuffer ();
 430                 Assert.AreEqual (0, bytes [2], "test#13");
 431                 Assert.AreEqual (1, bytes [3], "test#14");
 432         }
 433
 434         [Test]
 435         public void Seek ()
 436         {
 437                 BufferedStream stream = new BufferedStream (mem);
 438                 stream.Write (new byte [] {0, 1, 2, 3, 4, 5}, 0, 6);
 439
 440                 Assert.AreEqual (6, stream.Position, "test#01");
 441
 442                 stream.Seek (-5, SeekOrigin.End);
 443                 Assert.AreEqual (1, stream.Position, "test#02");
 444
 445                 stream.Seek (3, SeekOrigin.Current);
 446                 Assert.AreEqual (4, stream.Position, "test#03");
 447
 448                 stream.Seek (300, SeekOrigin.Current);
 449                 Assert.AreEqual (304, stream.Position, "test#04");
 450         }
 451
 452         [Test]
 453         [ExpectedException(typeof (IOException))]
 454         public void SeekException ()
 455         {
 456                 BufferedStream stream = new BufferedStream (mem);
 457                 stream.Seek (-1, SeekOrigin.Begin);
 458         }
 459
 460         [Test]
 461         public void SetLength ()
 462         {
 463                 BufferedStream stream = new BufferedStream (mem);
 464                 stream.Write (new byte [] {0,1,2,3,4,5}, 0, 6);
 465
 466                 Assert.AreEqual (6, stream.Length, "test#01");
 467                 stream.SetLength (60);
 468                 Assert.AreEqual (60, stream.Length, "test#02");
 469
 470                 stream.SetLength (2);
 471                 Assert.AreEqual (2, stream.Length, "test#03");
 472         }
 473
 474          [Test]
 475          [ExpectedException(typeof(ArgumentOutOfRangeException))]
 476          public void SetLengthException ()
 477          {
 478                 BufferedStream stream = new BufferedStream (mem);
 479                 stream.SetLength (-1);
 480          }
 481
 482          [Test]
 483          [ExpectedException(typeof(NotSupportedException))]
 484          public void SetLengthException2 ()
 485          {
 486                 BufferedStream stream = new BufferedStream (mem);
 487                 mem.Close ();
 488                 stream.SetLength (1);
 489          }
 490
 491          [Test]
 492          public void SetLengthException3 ()
 493          {
 494                 BufferedStream stream = new BufferedStream (mem);
 495                 mem = null;
 496                 // Strangely, this does not throw an exception on .NET 1.1
 497                 stream.SetLength (1);
 498          }
 499
 500          [Test]
 501          public void Position ()
 502          {
 503                 mem = new MemoryStream ();
 504                 BufferedStream stream = new BufferedStream (mem,5);
 505                 stream.Write (new byte [] {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}, 0, 16);
 506
 507                 stream.Position = 0;
 508                 Assert.AreEqual (0, stream.Position, "test#01");
 509                 Assert.AreEqual (0, stream.ReadByte (), "test#02");
 510
 511                 stream.Position = 5;
 512                 Assert.AreEqual (5, stream.Position, "test#01");
 513                 Assert.AreEqual (5, stream.ReadByte (), "test#02");
 514
 515                 // Should not need to read from the underlying stream:
 516                 stream.Position = 7;
 517                 Assert.AreEqual (7, stream.Position, "test#01");
 518                 Assert.AreEqual (7, stream.ReadByte (), "test#02");
 519
 520                 // Should not need to read from the underlying stream:
 521                 stream.Position = 5;
 522                 Assert.AreEqual (5, stream.Position, "test#01");
 523                 Assert.AreEqual (5, stream.ReadByte (), "test#02");
 524
 525                 // Should not need to read from the underlying stream:
 526                 stream.Position = 9;
 527                 Assert.AreEqual (9, stream.Position, "test#01");
 528                 Assert.AreEqual (9, stream.ReadByte (), "test#02");
 529
 530                 stream.Position = 10;
 531                 Assert.AreEqual (10, stream.Position, "test#01");
 532                 Assert.AreEqual (10, stream.ReadByte (), "test#02");
 533
 534                 stream.Position = 9;
 535                 Assert.AreEqual (9, stream.Position, "test#01");
 536                 Assert.AreEqual (9, stream.ReadByte (), "test#02");
 537          }
 538
 539         [Test]
 540         public void PositionAfterSetLength ()
 541         {
 542                 BufferedStream stream = new BufferedStream (new MemoryStream ());
 543                 stream.SetLength (32);
 544                 stream.Position = 32;
 545                 stream.SetLength (16);
 546                 Assert.AreEqual (16, stream.Position, "Position==16");
 547         }
 548
 549         [Test]
 550         [ExpectedException (typeof (ObjectDisposedException))]
 551         public void SetLength_Disposed ()
 552         {
 553                 BufferedStream stream = new BufferedStream (new MemoryStream ());
 554                 stream.Close ();
 555                 stream.SetLength (16);
 556         }
 557
 558         [Test]
 559         [ExpectedException (typeof (NotSupportedException))]
 560         public void Seek_ClosedMemoryStream ()
 561         {
 562                 MemoryStream ms = new MemoryStream ();
 563                 BufferedStream stream = new BufferedStream (ms);
 564                 ms.Close ();
 565                 stream.Seek (0, SeekOrigin.Begin);
 566         }
 567
 568         [Test]
 569         [ExpectedException (typeof (ObjectDisposedException))]
 570         public void Seek_ClosedBufferedStream ()
 571         {
 572                 BufferedStream stream = new BufferedStream (new MemoryStream ());
 573                 stream.Close ();
 574                 stream.Seek (0, SeekOrigin.Begin);
 575         }
 576 }
 577 }