base/files/file_unittest.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/files/file.h"
   6 #include "base/files/file_util.h"
   7 #include "base/files/scoped_temp_dir.h"
   8 #include "base/memory/scoped_ptr.h"
   9 #include "base/time/time.h"
  10 #include "testing/gtest/include/gtest/gtest.h"
  11
  12 using base::File;
  13 using base::FilePath;
  14
  15 TEST(FileTest, Create) {
  16   base::ScopedTempDir temp_dir;
  17   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
  18   FilePath file_path = temp_dir.path().AppendASCII("create_file_1");
  19
  20   {
  21     // Don't create a File at all.
  22     File file;
  23     EXPECT_FALSE(file.IsValid());
  24     EXPECT_EQ(base::File::FILE_ERROR_FAILED, file.error_details());
  25
  26     File file2(base::File::FILE_ERROR_TOO_MANY_OPENED);
  27     EXPECT_FALSE(file2.IsValid());
  28     EXPECT_EQ(base::File::FILE_ERROR_TOO_MANY_OPENED, file2.error_details());
  29   }
  30
  31   {
  32     // Open a file that doesn't exist.
  33     File file(file_path, base::File::FLAG_OPEN | base::File::FLAG_READ);
  34     EXPECT_FALSE(file.IsValid());
  35     EXPECT_EQ(base::File::FILE_ERROR_NOT_FOUND, file.error_details());
  36   }
  37
  38   {
  39     // Open or create a file.
  40     File file(file_path, base::File::FLAG_OPEN_ALWAYS | base::File::FLAG_READ);
  41     EXPECT_TRUE(file.IsValid());
  42     EXPECT_TRUE(file.created());
  43     EXPECT_EQ(base::File::FILE_OK, file.error_details());
  44   }
  45
  46   {
  47     // Open an existing file.
  48     File file(file_path, base::File::FLAG_OPEN | base::File::FLAG_READ);
  49     EXPECT_TRUE(file.IsValid());
  50     EXPECT_FALSE(file.created());
  51     EXPECT_EQ(base::File::FILE_OK, file.error_details());
  52
  53     // This time verify closing the file.
  54     file.Close();
  55     EXPECT_FALSE(file.IsValid());
  56   }
  57
  58   {
  59     // Open an existing file through Initialize
  60     File file;
  61     file.Initialize(file_path, base::File::FLAG_OPEN | base::File::FLAG_READ);
  62     EXPECT_TRUE(file.IsValid());
  63     EXPECT_FALSE(file.created());
  64     EXPECT_EQ(base::File::FILE_OK, file.error_details());
  65
  66     // This time verify closing the file.
  67     file.Close();
  68     EXPECT_FALSE(file.IsValid());
  69   }
  70
  71   {
  72     // Create a file that exists.
  73     File file(file_path, base::File::FLAG_CREATE | base::File::FLAG_READ);
  74     EXPECT_FALSE(file.IsValid());
  75     EXPECT_FALSE(file.created());
  76     EXPECT_EQ(base::File::FILE_ERROR_EXISTS, file.error_details());
  77   }
  78
  79   {
  80     // Create or overwrite a file.
  81     File file(file_path,
  82               base::File::FLAG_CREATE_ALWAYS | base::File::FLAG_WRITE);
  83     EXPECT_TRUE(file.IsValid());
  84     EXPECT_TRUE(file.created());
  85     EXPECT_EQ(base::File::FILE_OK, file.error_details());
  86   }
  87
  88   {
  89     // Create a delete-on-close file.
  90     file_path = temp_dir.path().AppendASCII("create_file_2");
  91     File file(file_path,
  92               base::File::FLAG_OPEN_ALWAYS | base::File::FLAG_READ |
  93                   base::File::FLAG_DELETE_ON_CLOSE);
  94     EXPECT_TRUE(file.IsValid());
  95     EXPECT_TRUE(file.created());
  96     EXPECT_EQ(base::File::FILE_OK, file.error_details());
  97   }
  98
  99   EXPECT_FALSE(base::PathExists(file_path));
 100 }
 101
 102 TEST(FileTest, Async) {
 103   base::ScopedTempDir temp_dir;
 104   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
 105   FilePath file_path = temp_dir.path().AppendASCII("create_file");
 106
 107   {
 108     File file(file_path, base::File::FLAG_OPEN_ALWAYS | base::File::FLAG_ASYNC);
 109     EXPECT_TRUE(file.IsValid());
 110     EXPECT_TRUE(file.async());
 111   }
 112
 113   {
 114     File file(file_path, base::File::FLAG_OPEN_ALWAYS);
 115     EXPECT_TRUE(file.IsValid());
 116     EXPECT_FALSE(file.async());
 117   }
 118 }
 119
 120 TEST(FileTest, DeleteOpenFile) {
 121   base::ScopedTempDir temp_dir;
 122   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
 123   FilePath file_path = temp_dir.path().AppendASCII("create_file_1");
 124
 125   // Create a file.
 126   File file(file_path,
 127             base::File::FLAG_OPEN_ALWAYS | base::File::FLAG_READ |
 128                 base::File::FLAG_SHARE_DELETE);
 129   EXPECT_TRUE(file.IsValid());
 130   EXPECT_TRUE(file.created());
 131   EXPECT_EQ(base::File::FILE_OK, file.error_details());
 132
 133   // Open an existing file and mark it as delete on close.
 134   File same_file(file_path,
 135                  base::File::FLAG_OPEN | base::File::FLAG_DELETE_ON_CLOSE |
 136                      base::File::FLAG_READ);
 137   EXPECT_TRUE(file.IsValid());
 138   EXPECT_FALSE(same_file.created());
 139   EXPECT_EQ(base::File::FILE_OK, same_file.error_details());
 140
 141   // Close both handles and check that the file is gone.
 142   file.Close();
 143   same_file.Close();
 144   EXPECT_FALSE(base::PathExists(file_path));
 145 }
 146
 147 TEST(FileTest, ReadWrite) {
 148   base::ScopedTempDir temp_dir;
 149   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
 150   FilePath file_path = temp_dir.path().AppendASCII("read_write_file");
 151   File file(file_path,
 152             base::File::FLAG_CREATE | base::File::FLAG_READ |
 153                 base::File::FLAG_WRITE);
 154   ASSERT_TRUE(file.IsValid());
 155
 156   char data_to_write[] = "test";
 157   const int kTestDataSize = 4;
 158
 159   // Write 0 bytes to the file.
 160   int bytes_written = file.Write(0, data_to_write, 0);
 161   EXPECT_EQ(0, bytes_written);
 162
 163   // Write "test" to the file.
 164   bytes_written = file.Write(0, data_to_write, kTestDataSize);
 165   EXPECT_EQ(kTestDataSize, bytes_written);
 166
 167   // Read from EOF.
 168   char data_read_1[32];
 169   int bytes_read = file.Read(kTestDataSize, data_read_1, kTestDataSize);
 170   EXPECT_EQ(0, bytes_read);
 171
 172   // Read from somewhere in the middle of the file.
 173   const int kPartialReadOffset = 1;
 174   bytes_read = file.Read(kPartialReadOffset, data_read_1, kTestDataSize);
 175   EXPECT_EQ(kTestDataSize - kPartialReadOffset, bytes_read);
 176   for (int i = 0; i < bytes_read; i++)
 177     EXPECT_EQ(data_to_write[i + kPartialReadOffset], data_read_1[i]);
 178
 179   // Read 0 bytes.
 180   bytes_read = file.Read(0, data_read_1, 0);
 181   EXPECT_EQ(0, bytes_read);
 182
 183   // Read the entire file.
 184   bytes_read = file.Read(0, data_read_1, kTestDataSize);
 185   EXPECT_EQ(kTestDataSize, bytes_read);
 186   for (int i = 0; i < bytes_read; i++)
 187     EXPECT_EQ(data_to_write[i], data_read_1[i]);
 188
 189   // Read again, but using the trivial native wrapper.
 190   bytes_read = file.ReadNoBestEffort(0, data_read_1, kTestDataSize);
 191   EXPECT_LE(bytes_read, kTestDataSize);
 192   for (int i = 0; i < bytes_read; i++)
 193     EXPECT_EQ(data_to_write[i], data_read_1[i]);
 194
 195   // Write past the end of the file.
 196   const int kOffsetBeyondEndOfFile = 10;
 197   const int kPartialWriteLength = 2;
 198   bytes_written = file.Write(kOffsetBeyondEndOfFile,
 199                              data_to_write, kPartialWriteLength);
 200   EXPECT_EQ(kPartialWriteLength, bytes_written);
 201
 202   // Make sure the file was extended.
 203   int64 file_size = 0;
 204   EXPECT_TRUE(GetFileSize(file_path, &file_size));
 205   EXPECT_EQ(kOffsetBeyondEndOfFile + kPartialWriteLength, file_size);
 206
 207   // Make sure the file was zero-padded.
 208   char data_read_2[32];
 209   bytes_read = file.Read(0, data_read_2, static_cast<int>(file_size));
 210   EXPECT_EQ(file_size, bytes_read);
 211   for (int i = 0; i < kTestDataSize; i++)
 212     EXPECT_EQ(data_to_write[i], data_read_2[i]);
 213   for (int i = kTestDataSize; i < kOffsetBeyondEndOfFile; i++)
 214     EXPECT_EQ(0, data_read_2[i]);
 215   for (int i = kOffsetBeyondEndOfFile; i < file_size; i++)
 216     EXPECT_EQ(data_to_write[i - kOffsetBeyondEndOfFile], data_read_2[i]);
 217 }
 218
 219 TEST(FileTest, Append) {
 220   base::ScopedTempDir temp_dir;
 221   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
 222   FilePath file_path = temp_dir.path().AppendASCII("append_file");
 223   File file(file_path, base::File::FLAG_CREATE | base::File::FLAG_APPEND);
 224   ASSERT_TRUE(file.IsValid());
 225
 226   char data_to_write[] = "test";
 227   const int kTestDataSize = 4;
 228
 229   // Write 0 bytes to the file.
 230   int bytes_written = file.Write(0, data_to_write, 0);
 231   EXPECT_EQ(0, bytes_written);
 232
 233   // Write "test" to the file.
 234   bytes_written = file.Write(0, data_to_write, kTestDataSize);
 235   EXPECT_EQ(kTestDataSize, bytes_written);
 236
 237   file.Close();
 238   File file2(file_path,
 239              base::File::FLAG_OPEN | base::File::FLAG_READ |
 240                  base::File::FLAG_APPEND);
 241   ASSERT_TRUE(file2.IsValid());
 242
 243   // Test passing the file around.
 244   file = file2.Pass();
 245   EXPECT_FALSE(file2.IsValid());
 246   ASSERT_TRUE(file.IsValid());
 247
 248   char append_data_to_write[] = "78";
 249   const int kAppendDataSize = 2;
 250
 251   // Append "78" to the file.
 252   bytes_written = file.Write(0, append_data_to_write, kAppendDataSize);
 253   EXPECT_EQ(kAppendDataSize, bytes_written);
 254
 255   // Read the entire file.
 256   char data_read_1[32];
 257   int bytes_read = file.Read(0, data_read_1,
 258                              kTestDataSize + kAppendDataSize);
 259   EXPECT_EQ(kTestDataSize + kAppendDataSize, bytes_read);
 260   for (int i = 0; i < kTestDataSize; i++)
 261     EXPECT_EQ(data_to_write[i], data_read_1[i]);
 262   for (int i = 0; i < kAppendDataSize; i++)
 263     EXPECT_EQ(append_data_to_write[i], data_read_1[kTestDataSize + i]);
 264 }
 265
 266
 267 TEST(FileTest, Length) {
 268   base::ScopedTempDir temp_dir;
 269   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
 270   FilePath file_path = temp_dir.path().AppendASCII("truncate_file");
 271   File file(file_path,
 272             base::File::FLAG_CREATE | base::File::FLAG_READ |
 273                 base::File::FLAG_WRITE);
 274   ASSERT_TRUE(file.IsValid());
 275   EXPECT_EQ(0, file.GetLength());
 276
 277   // Write "test" to the file.
 278   char data_to_write[] = "test";
 279   int kTestDataSize = 4;
 280   int bytes_written = file.Write(0, data_to_write, kTestDataSize);
 281   EXPECT_EQ(kTestDataSize, bytes_written);
 282
 283   // Extend the file.
 284   const int kExtendedFileLength = 10;
 285   int64 file_size = 0;
 286   EXPECT_TRUE(file.SetLength(kExtendedFileLength));
 287   EXPECT_EQ(kExtendedFileLength, file.GetLength());
 288   EXPECT_TRUE(GetFileSize(file_path, &file_size));
 289   EXPECT_EQ(kExtendedFileLength, file_size);
 290
 291   // Make sure the file was zero-padded.
 292   char data_read[32];
 293   int bytes_read = file.Read(0, data_read, static_cast<int>(file_size));
 294   EXPECT_EQ(file_size, bytes_read);
 295   for (int i = 0; i < kTestDataSize; i++)
 296     EXPECT_EQ(data_to_write[i], data_read[i]);
 297   for (int i = kTestDataSize; i < file_size; i++)
 298     EXPECT_EQ(0, data_read[i]);
 299
 300   // Truncate the file.
 301   const int kTruncatedFileLength = 2;
 302   EXPECT_TRUE(file.SetLength(kTruncatedFileLength));
 303   EXPECT_EQ(kTruncatedFileLength, file.GetLength());
 304   EXPECT_TRUE(GetFileSize(file_path, &file_size));
 305   EXPECT_EQ(kTruncatedFileLength, file_size);
 306
 307   // Make sure the file was truncated.
 308   bytes_read = file.Read(0, data_read, kTestDataSize);
 309   EXPECT_EQ(file_size, bytes_read);
 310   for (int i = 0; i < file_size; i++)
 311     EXPECT_EQ(data_to_write[i], data_read[i]);
 312 }
 313
 314 // Flakily fails: http://crbug.com/86494
 315 #if defined(OS_ANDROID)
 316 TEST(FileTest, TouchGetInfo) {
 317 #else
 318 TEST(FileTest, DISABLED_TouchGetInfo) {
 319 #endif
 320   base::ScopedTempDir temp_dir;
 321   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
 322   File file(temp_dir.path().AppendASCII("touch_get_info_file"),
 323             base::File::FLAG_CREATE | base::File::FLAG_WRITE |
 324                 base::File::FLAG_WRITE_ATTRIBUTES);
 325   ASSERT_TRUE(file.IsValid());
 326
 327   // Get info for a newly created file.
 328   base::File::Info info;
 329   EXPECT_TRUE(file.GetInfo(&info));
 330
 331   // Add 2 seconds to account for possible rounding errors on
 332   // filesystems that use a 1s or 2s timestamp granularity.
 333   base::Time now = base::Time::Now() + base::TimeDelta::FromSeconds(2);
 334   EXPECT_EQ(0, info.size);
 335   EXPECT_FALSE(info.is_directory);
 336   EXPECT_FALSE(info.is_symbolic_link);
 337   EXPECT_LE(info.last_accessed.ToInternalValue(), now.ToInternalValue());
 338   EXPECT_LE(info.last_modified.ToInternalValue(), now.ToInternalValue());
 339   EXPECT_LE(info.creation_time.ToInternalValue(), now.ToInternalValue());
 340   base::Time creation_time = info.creation_time;
 341
 342   // Write "test" to the file.
 343   char data[] = "test";
 344   const int kTestDataSize = 4;
 345   int bytes_written = file.Write(0, data, kTestDataSize);
 346   EXPECT_EQ(kTestDataSize, bytes_written);
 347
 348   // Change the last_accessed and last_modified dates.
 349   // It's best to add values that are multiples of 2 (in seconds)
 350   // to the current last_accessed and last_modified times, because
 351   // FATxx uses a 2s timestamp granularity.
 352   base::Time new_last_accessed =
 353       info.last_accessed + base::TimeDelta::FromSeconds(234);
 354   base::Time new_last_modified =
 355       info.last_modified + base::TimeDelta::FromMinutes(567);
 356
 357   EXPECT_TRUE(file.SetTimes(new_last_accessed, new_last_modified));
 358
 359   // Make sure the file info was updated accordingly.
 360   EXPECT_TRUE(file.GetInfo(&info));
 361   EXPECT_EQ(info.size, kTestDataSize);
 362   EXPECT_FALSE(info.is_directory);
 363   EXPECT_FALSE(info.is_symbolic_link);
 364
 365   // ext2/ext3 and HPS/HPS+ seem to have a timestamp granularity of 1s.
 366 #if defined(OS_POSIX)
 367   EXPECT_EQ(info.last_accessed.ToTimeVal().tv_sec,
 368             new_last_accessed.ToTimeVal().tv_sec);
 369   EXPECT_EQ(info.last_modified.ToTimeVal().tv_sec,
 370             new_last_modified.ToTimeVal().tv_sec);
 371 #else
 372   EXPECT_EQ(info.last_accessed.ToInternalValue(),
 373             new_last_accessed.ToInternalValue());
 374   EXPECT_EQ(info.last_modified.ToInternalValue(),
 375             new_last_modified.ToInternalValue());
 376 #endif
 377
 378   EXPECT_EQ(info.creation_time.ToInternalValue(),
 379             creation_time.ToInternalValue());
 380 }
 381
 382 TEST(FileTest, ReadAtCurrentPosition) {
 383   base::ScopedTempDir temp_dir;
 384   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
 385   FilePath file_path = temp_dir.path().AppendASCII("read_at_current_position");
 386   File file(file_path,
 387             base::File::FLAG_CREATE | base::File::FLAG_READ |
 388                 base::File::FLAG_WRITE);
 389   EXPECT_TRUE(file.IsValid());
 390
 391   const char kData[] = "test";
 392   const int kDataSize = sizeof(kData) - 1;
 393   EXPECT_EQ(kDataSize, file.Write(0, kData, kDataSize));
 394
 395   EXPECT_EQ(0, file.Seek(base::File::FROM_BEGIN, 0));
 396
 397   char buffer[kDataSize];
 398   int first_chunk_size = kDataSize / 2;
 399   EXPECT_EQ(first_chunk_size, file.ReadAtCurrentPos(buffer, first_chunk_size));
 400   EXPECT_EQ(kDataSize - first_chunk_size,
 401             file.ReadAtCurrentPos(buffer + first_chunk_size,
 402                                   kDataSize - first_chunk_size));
 403   EXPECT_EQ(std::string(buffer, buffer + kDataSize), std::string(kData));
 404 }
 405
 406 TEST(FileTest, WriteAtCurrentPosition) {
 407   base::ScopedTempDir temp_dir;
 408   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
 409   FilePath file_path = temp_dir.path().AppendASCII("write_at_current_position");
 410   File file(file_path,
 411             base::File::FLAG_CREATE | base::File::FLAG_READ |
 412                 base::File::FLAG_WRITE);
 413   EXPECT_TRUE(file.IsValid());
 414
 415   const char kData[] = "test";
 416   const int kDataSize = sizeof(kData) - 1;
 417
 418   int first_chunk_size = kDataSize / 2;
 419   EXPECT_EQ(first_chunk_size, file.WriteAtCurrentPos(kData, first_chunk_size));
 420   EXPECT_EQ(kDataSize - first_chunk_size,
 421             file.WriteAtCurrentPos(kData + first_chunk_size,
 422                                    kDataSize - first_chunk_size));
 423
 424   char buffer[kDataSize];
 425   EXPECT_EQ(kDataSize, file.Read(0, buffer, kDataSize));
 426   EXPECT_EQ(std::string(buffer, buffer + kDataSize), std::string(kData));
 427 }
 428
 429 TEST(FileTest, Seek) {
 430   base::ScopedTempDir temp_dir;
 431   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
 432   FilePath file_path = temp_dir.path().AppendASCII("seek_file");
 433   File file(file_path,
 434             base::File::FLAG_CREATE | base::File::FLAG_READ |
 435                 base::File::FLAG_WRITE);
 436   ASSERT_TRUE(file.IsValid());
 437
 438   const int64 kOffset = 10;
 439   EXPECT_EQ(kOffset, file.Seek(base::File::FROM_BEGIN, kOffset));
 440   EXPECT_EQ(2 * kOffset, file.Seek(base::File::FROM_CURRENT, kOffset));
 441   EXPECT_EQ(kOffset, file.Seek(base::File::FROM_CURRENT, -kOffset));
 442   EXPECT_TRUE(file.SetLength(kOffset * 2));
 443   EXPECT_EQ(kOffset, file.Seek(base::File::FROM_END, -kOffset));
 444 }
 445
 446 TEST(FileTest, Duplicate) {
 447   base::ScopedTempDir temp_dir;
 448   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
 449   FilePath file_path = temp_dir.path().AppendASCII("file");
 450   File file(file_path,(base::File::FLAG_CREATE |
 451                        base::File::FLAG_READ |
 452                        base::File::FLAG_WRITE));
 453   ASSERT_TRUE(file.IsValid());
 454
 455   File file2(file.Duplicate());
 456   ASSERT_TRUE(file2.IsValid());
 457
 458   // Write through one handle, close it, read through the other.
 459   static const char kData[] = "now is a good time.";
 460   static const int kDataLen = sizeof(kData) - 1;
 461
 462   ASSERT_EQ(0, file.Seek(base::File::FROM_CURRENT, 0));
 463   ASSERT_EQ(0, file2.Seek(base::File::FROM_CURRENT, 0));
 464   ASSERT_EQ(kDataLen, file.WriteAtCurrentPos(kData, kDataLen));
 465   ASSERT_EQ(kDataLen, file.Seek(base::File::FROM_CURRENT, 0));
 466   ASSERT_EQ(kDataLen, file2.Seek(base::File::FROM_CURRENT, 0));
 467   file.Close();
 468   char buf[kDataLen];
 469   ASSERT_EQ(kDataLen, file2.Read(0, &buf[0], kDataLen));
 470   ASSERT_EQ(std::string(kData, kDataLen), std::string(&buf[0], kDataLen));
 471 }
 472
 473 TEST(FileTest, DuplicateDeleteOnClose) {
 474   base::ScopedTempDir temp_dir;
 475   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
 476   FilePath file_path = temp_dir.path().AppendASCII("file");
 477   File file(file_path,(base::File::FLAG_CREATE |
 478                        base::File::FLAG_READ |
 479                        base::File::FLAG_WRITE |
 480                        base::File::FLAG_DELETE_ON_CLOSE));
 481   ASSERT_TRUE(file.IsValid());
 482   File file2(file.Duplicate());
 483   ASSERT_TRUE(file2.IsValid());
 484   file.Close();
 485   file2.Close();
 486   ASSERT_FALSE(base::PathExists(file_path));
 487 }
 488
 489 #if defined(OS_WIN)
 490 TEST(FileTest, GetInfoForDirectory) {
 491   base::ScopedTempDir temp_dir;
 492   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
 493   FilePath empty_dir = temp_dir.path().Append(FILE_PATH_LITERAL("gpfi_test"));
 494   ASSERT_TRUE(CreateDirectory(empty_dir));
 495
 496   base::File dir(
 497       ::CreateFile(empty_dir.value().c_str(),
 498                    GENERIC_READ | GENERIC_WRITE,
 499                    FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
 500                    NULL,
 501                    OPEN_EXISTING,
 502                    FILE_FLAG_BACKUP_SEMANTICS,  // Needed to open a directory.
 503                    NULL));
 504   ASSERT_TRUE(dir.IsValid());
 505
 506   base::File::Info info;
 507   EXPECT_TRUE(dir.GetInfo(&info));
 508   EXPECT_TRUE(info.is_directory);
 509   EXPECT_FALSE(info.is_symbolic_link);
 510   EXPECT_EQ(0, info.size);
 511 }
 512 #endif  // defined(OS_WIN)
 513
 514 #if defined(OS_POSIX) && defined(GTEST_HAS_DEATH_TEST)
 515 TEST(FileTest, MemoryCorruption) {
 516   {
 517     // Test that changing the checksum value is detected.
 518     base::File file;
 519     EXPECT_NE(file.file_.file_memory_checksum_,
 520               static_cast<unsigned int>(file.GetPlatformFile()));
 521     file.file_.file_memory_checksum_ = file.GetPlatformFile();
 522     EXPECT_DEATH(file.IsValid(), "");
 523
 524     file.file_.UpdateChecksum();  // Do not crash on File::~File().
 525   }
 526
 527   {
 528     // Test that changing the file descriptor value is detected.
 529     base::File file;
 530     file.file_.file_.reset(17);
 531     EXPECT_DEATH(file.IsValid(), "");
 532
 533     // Do not crash on File::~File().
 534     ignore_result(file.file_.file_.release());
 535     file.file_.UpdateChecksum();
 536   }
 537
 538   {
 539     // Test that GetPlatformFile() checks for corruption.
 540     base::File file;
 541     file.file_.file_memory_checksum_ = file.GetPlatformFile();
 542     EXPECT_DEATH(file.GetPlatformFile(), "");
 543
 544     file.file_.UpdateChecksum();  // Do not crash on File::~File().
 545   }
 546
 547   {
 548     // Test that the base::File destructor checks for corruption.
 549     scoped_ptr<base::File> file(new File());
 550     file->file_.file_memory_checksum_ = file->GetPlatformFile();
 551     EXPECT_DEATH(file.reset(), "");
 552
 553     // Do not crash on this thread's destructor call.
 554     file->file_.UpdateChecksum();
 555   }
 556
 557   {
 558     // Test that the base::File constructor checks for corruption.
 559     base::File file;
 560     file.file_.file_memory_checksum_ = file.GetPlatformFile();
 561     EXPECT_DEATH(File f(file.Pass()), "");
 562
 563     file.file_.UpdateChecksum();  // Do not crash on File::~File().
 564   }
 565
 566   {
 567     // Test that doing IO checks for corruption.
 568     base::File file;
 569     file.file_.file_.reset(17);  // A fake open FD value.
 570
 571     EXPECT_DEATH(file.Seek(File::FROM_BEGIN, 0), "");
 572     EXPECT_DEATH(file.Read(0, NULL, 0), "");
 573     EXPECT_DEATH(file.ReadAtCurrentPos(NULL, 0), "");
 574     EXPECT_DEATH(file.Write(0, NULL, 0), "");
 575
 576     ignore_result(file.file_.file_.release());
 577     file.file_.UpdateChecksum();
 578   }
 579 }
 580 #endif  // defined(OS_POSIX)