src/media/cdm/ppapi/cdm_file_io_test.cc

   1 // Copyright 2013 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 "media/cdm/ppapi/cdm_file_io_test.h"
   6
   7 #include "base/bind.h"
   8 #include "base/callback_helpers.h"
   9 #include "base/logging.h"
  10
  11 namespace media {
  12
  13 #define FILE_IO_DVLOG(level) DVLOG(level) << "File IO Test: "
  14
  15 const uint8 kData[] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
  16                         0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f };
  17 const uint32 kDataSize = arraysize(kData);
  18
  19 const uint8 kBigData[] = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
  20                            0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff,
  21                            0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
  22                            0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff,
  23                            0x00 };
  24 const uint32 kBigDataSize = arraysize(kBigData);
  25
  26 // Must be > kReadSize in cdm_file_io_impl.cc.
  27 const uint32 kLargeDataSize = 20 * 1024 + 7;
  28
  29 // Macros to help add test cases/steps.
  30
  31 // |test_name| is also used as the file name. File name validity tests relies
  32 // on this to work.
  33 #define START_TEST_CASE(test_name)                                     \
  34   do {                                                                 \
  35     FileIOTest test_case(create_file_io_cb_, test_name);               \
  36     CREATE_FILE_IO  // Create FileIO for each test case.
  37
  38 #define ADD_TEST_STEP(type, status, data, data_size)                   \
  39     test_case.AddTestStep(FileIOTest::type, cdm::FileIOClient::status, \
  40                           (data), (data_size));
  41
  42 #define END_TEST_CASE                 \
  43     remaining_tests_.push_back(test_case); \
  44   } while(0);
  45
  46 #define CREATE_FILE_IO \
  47   ADD_TEST_STEP(ACTION_CREATE, kSuccess, NULL, 0)
  48
  49 #define OPEN_FILE \
  50   ADD_TEST_STEP(ACTION_OPEN, kSuccess, NULL, 0)
  51
  52 #define EXPECT_FILE_OPENED(status) \
  53   ADD_TEST_STEP(RESULT_OPEN, status, NULL, 0)
  54
  55 #define READ_FILE \
  56   ADD_TEST_STEP(ACTION_READ, kSuccess, NULL, 0)
  57
  58 #define EXPECT_FILE_READ(status, data, data_size) \
  59   ADD_TEST_STEP(RESULT_READ, status, data, data_size)
  60
  61 #define WRITE_FILE(data, data_size) \
  62   ADD_TEST_STEP(ACTION_WRITE, kSuccess, data, data_size)
  63
  64 #define EXPECT_FILE_WRITTEN(status) \
  65   ADD_TEST_STEP(RESULT_WRITE, status, NULL, 0)
  66
  67 #define CLOSE_FILE \
  68   ADD_TEST_STEP(ACTION_CLOSE, kSuccess, NULL, 0)
  69
  70 // FileIOTestRunner implementation.
  71
  72 FileIOTestRunner::FileIOTestRunner(const CreateFileIOCB& create_file_io_cb)
  73     : create_file_io_cb_(create_file_io_cb),
  74       total_num_tests_(0),
  75       num_passed_tests_(0) {
  76   // Generate |large_data_|.
  77   large_data_.resize(kLargeDataSize);
  78   for (size_t i = 0; i < kLargeDataSize; ++i)
  79     large_data_[i] = i % kuint8max;
  80
  81   AddTests();
  82 }
  83
  84 FileIOTestRunner::~FileIOTestRunner() {
  85   if (remaining_tests_.empty())
  86     return;
  87
  88   DCHECK_LT(num_passed_tests_, total_num_tests_);
  89   FILE_IO_DVLOG(1) << "Not Finished (probably due to timeout). "
  90                    << num_passed_tests_ << " passed in "
  91                    << total_num_tests_ << " tests.";
  92 }
  93
  94 // Note: Consecutive expectations (EXPECT*) can happen in any order.
  95 void FileIOTestRunner::AddTests() {
  96   START_TEST_CASE("/FileNameStartsWithForwardSlash")
  97     OPEN_FILE
  98     EXPECT_FILE_OPENED(kError)
  99   END_TEST_CASE
 100
 101   START_TEST_CASE("FileNameContains/ForwardSlash")
 102     OPEN_FILE
 103     EXPECT_FILE_OPENED(kError)
 104   END_TEST_CASE
 105
 106   START_TEST_CASE("\\FileNameStartsWithBackslash")
 107     OPEN_FILE
 108     EXPECT_FILE_OPENED(kError)
 109   END_TEST_CASE
 110
 111   START_TEST_CASE("FileNameContains\\Backslash")
 112     OPEN_FILE
 113     EXPECT_FILE_OPENED(kError)
 114   END_TEST_CASE
 115
 116   START_TEST_CASE("_FileNameStartsWithUnderscore")
 117     OPEN_FILE
 118     EXPECT_FILE_OPENED(kError)
 119   END_TEST_CASE
 120
 121   START_TEST_CASE("FileNameContains_Underscore")
 122     OPEN_FILE
 123     EXPECT_FILE_OPENED(kSuccess)
 124   END_TEST_CASE
 125
 126   START_TEST_CASE("ReadBeforeOpeningFile")
 127     READ_FILE
 128     EXPECT_FILE_READ(kError, NULL, 0)
 129   END_TEST_CASE
 130
 131   START_TEST_CASE("WriteBeforeOpeningFile")
 132     WRITE_FILE(kData, kDataSize)
 133     EXPECT_FILE_WRITTEN(kError)
 134   END_TEST_CASE
 135
 136   START_TEST_CASE("ReadBeforeFileOpened")
 137     OPEN_FILE
 138     READ_FILE
 139     EXPECT_FILE_OPENED(kSuccess)
 140     EXPECT_FILE_READ(kError, NULL, 0)
 141     // After file opened, we can still do normal operations.
 142     WRITE_FILE(kData, kDataSize)
 143     EXPECT_FILE_WRITTEN(kSuccess)
 144     READ_FILE
 145     EXPECT_FILE_READ(kSuccess, kData, kDataSize)
 146   END_TEST_CASE
 147
 148   START_TEST_CASE("WriteBeforeFileOpened")
 149     OPEN_FILE
 150     WRITE_FILE(kData, kDataSize)
 151     EXPECT_FILE_WRITTEN(kError)
 152     EXPECT_FILE_OPENED(kSuccess)
 153     // After file opened, we can still do normal operations.
 154     WRITE_FILE(kData, kDataSize)
 155     EXPECT_FILE_WRITTEN(kSuccess)
 156     READ_FILE
 157     EXPECT_FILE_READ(kSuccess, kData, kDataSize)
 158   END_TEST_CASE
 159
 160   START_TEST_CASE("ReadDuringPendingRead")
 161     OPEN_FILE
 162     EXPECT_FILE_OPENED(kSuccess)
 163     WRITE_FILE(kData, kDataSize)
 164     EXPECT_FILE_WRITTEN(kSuccess)
 165     READ_FILE
 166     READ_FILE
 167     EXPECT_FILE_READ(kInUse, NULL, 0)
 168     EXPECT_FILE_READ(kSuccess, kData, kDataSize)
 169     // Read again.
 170     READ_FILE
 171     EXPECT_FILE_READ(kSuccess, kData, kDataSize)
 172   END_TEST_CASE
 173
 174   START_TEST_CASE("ReadDuringPendingWrite")
 175     OPEN_FILE
 176     EXPECT_FILE_OPENED(kSuccess)
 177     WRITE_FILE(kData, kDataSize)
 178     READ_FILE
 179     EXPECT_FILE_READ(kInUse, NULL, 0)
 180     EXPECT_FILE_WRITTEN(kSuccess)
 181     // Read again.
 182     READ_FILE
 183     EXPECT_FILE_READ(kSuccess, kData, kDataSize)
 184   END_TEST_CASE
 185
 186   START_TEST_CASE("WriteDuringPendingRead")
 187     OPEN_FILE
 188     EXPECT_FILE_OPENED(kSuccess)
 189     READ_FILE
 190     WRITE_FILE(kData, kDataSize)
 191     EXPECT_FILE_WRITTEN(kInUse)
 192     EXPECT_FILE_READ(kSuccess, NULL, 0)
 193     // We can still do normal operations.
 194     WRITE_FILE(kData, kDataSize)
 195     EXPECT_FILE_WRITTEN(kSuccess)
 196     READ_FILE
 197     EXPECT_FILE_READ(kSuccess, kData, kDataSize)
 198   END_TEST_CASE
 199
 200   START_TEST_CASE("WriteDuringPendingWrite")
 201     OPEN_FILE
 202     EXPECT_FILE_OPENED(kSuccess)
 203     WRITE_FILE(kData, kDataSize)
 204     WRITE_FILE(kBigData, kBigDataSize)
 205     EXPECT_FILE_WRITTEN(kInUse)
 206     EXPECT_FILE_WRITTEN(kSuccess)
 207     // Read to make sure original data (kData) is written.
 208     READ_FILE
 209     EXPECT_FILE_READ(kSuccess, kData, kDataSize)
 210   END_TEST_CASE
 211
 212   START_TEST_CASE("ReadFileThatDoesNotExist")
 213     OPEN_FILE
 214     EXPECT_FILE_OPENED(kSuccess)
 215     READ_FILE
 216     EXPECT_FILE_READ(kSuccess, NULL, 0)
 217   END_TEST_CASE
 218
 219   START_TEST_CASE("WriteAndRead")
 220     OPEN_FILE
 221     EXPECT_FILE_OPENED(kSuccess)
 222     WRITE_FILE(kData, kDataSize)
 223     EXPECT_FILE_WRITTEN(kSuccess)
 224     READ_FILE
 225     EXPECT_FILE_READ(kSuccess, kData, kDataSize)
 226   END_TEST_CASE
 227
 228   START_TEST_CASE("WriteAndReadEmptyFile")
 229     OPEN_FILE
 230     EXPECT_FILE_OPENED(kSuccess)
 231     WRITE_FILE(NULL, 0)
 232     EXPECT_FILE_WRITTEN(kSuccess)
 233     READ_FILE
 234     EXPECT_FILE_READ(kSuccess, NULL, 0)
 235   END_TEST_CASE
 236
 237   START_TEST_CASE("WriteAndReadLargeData")
 238     OPEN_FILE
 239     EXPECT_FILE_OPENED(kSuccess)
 240     WRITE_FILE(&large_data_[0], kLargeDataSize)
 241     EXPECT_FILE_WRITTEN(kSuccess)
 242     READ_FILE
 243     EXPECT_FILE_READ(kSuccess, &large_data_[0], kLargeDataSize)
 244   END_TEST_CASE
 245
 246   START_TEST_CASE("OverwriteZeroBytes")
 247     OPEN_FILE
 248     EXPECT_FILE_OPENED(kSuccess)
 249     WRITE_FILE(kData, kDataSize)
 250     EXPECT_FILE_WRITTEN(kSuccess)
 251     READ_FILE
 252     EXPECT_FILE_READ(kSuccess, kData, kDataSize)
 253     WRITE_FILE(NULL, 0)
 254     EXPECT_FILE_WRITTEN(kSuccess)
 255     READ_FILE
 256     EXPECT_FILE_READ(kSuccess, NULL, 0)
 257   END_TEST_CASE
 258
 259   START_TEST_CASE("OverwriteWithSmallerData")
 260     OPEN_FILE
 261     EXPECT_FILE_OPENED(kSuccess)
 262     WRITE_FILE(kBigData, kBigDataSize)
 263     EXPECT_FILE_WRITTEN(kSuccess)
 264     WRITE_FILE(kData, kDataSize)
 265     EXPECT_FILE_WRITTEN(kSuccess)
 266     READ_FILE
 267     EXPECT_FILE_READ(kSuccess, kData, kDataSize)
 268   END_TEST_CASE
 269
 270   START_TEST_CASE("OverwriteWithLargerData")
 271     OPEN_FILE
 272     EXPECT_FILE_OPENED(kSuccess)
 273     WRITE_FILE(kData, kDataSize)
 274     EXPECT_FILE_WRITTEN(kSuccess)
 275     WRITE_FILE(kBigData, kBigDataSize)
 276     EXPECT_FILE_WRITTEN(kSuccess)
 277     READ_FILE
 278     EXPECT_FILE_READ(kSuccess, kBigData, kBigDataSize)
 279   END_TEST_CASE
 280
 281   START_TEST_CASE("ReadExistingFile")
 282     OPEN_FILE
 283     EXPECT_FILE_OPENED(kSuccess)
 284     WRITE_FILE(kData, kDataSize)
 285     EXPECT_FILE_WRITTEN(kSuccess)
 286     CLOSE_FILE
 287     CREATE_FILE_IO
 288     OPEN_FILE
 289     EXPECT_FILE_OPENED(kSuccess)
 290     READ_FILE
 291     EXPECT_FILE_READ(kSuccess, kData, kDataSize)
 292   END_TEST_CASE
 293
 294   START_TEST_CASE("MultipleReadsAndWrites")
 295     OPEN_FILE
 296     EXPECT_FILE_OPENED(kSuccess)
 297     // Read file which doesn't exist.
 298     READ_FILE
 299     EXPECT_FILE_READ(kSuccess, NULL, 0)
 300     // Write kData to file.
 301     WRITE_FILE(kData, kDataSize)
 302     EXPECT_FILE_WRITTEN(kSuccess)
 303     // Read file.
 304     READ_FILE
 305     EXPECT_FILE_READ(kSuccess, kData, kDataSize)
 306     // Read file again.
 307     READ_FILE
 308     EXPECT_FILE_READ(kSuccess, kData, kDataSize)
 309     // Overwrite file with large data.
 310     WRITE_FILE(&large_data_[0], kLargeDataSize)
 311     EXPECT_FILE_WRITTEN(kSuccess)
 312     // Read file.
 313     READ_FILE
 314     EXPECT_FILE_READ(kSuccess, &large_data_[0], kLargeDataSize)
 315     // Overwrite file with kData.
 316     WRITE_FILE(kData, kDataSize)
 317     EXPECT_FILE_WRITTEN(kSuccess)
 318     // Read file.
 319     READ_FILE
 320     EXPECT_FILE_READ(kSuccess, kData, kDataSize)
 321     // Overwrite file with zero bytes.
 322     WRITE_FILE(NULL, 0)
 323     EXPECT_FILE_WRITTEN(kSuccess)
 324     // Read file.
 325     READ_FILE
 326     EXPECT_FILE_READ(kSuccess, NULL, 0)
 327   END_TEST_CASE
 328
 329   START_TEST_CASE("OpenAfterOpen")
 330     OPEN_FILE
 331     EXPECT_FILE_OPENED(kSuccess)
 332     OPEN_FILE
 333     EXPECT_FILE_OPENED(kError)
 334   END_TEST_CASE
 335
 336   START_TEST_CASE("OpenDuringPendingOpen")
 337     OPEN_FILE
 338     OPEN_FILE
 339     EXPECT_FILE_OPENED(kError)  // The second Open() failed.
 340     EXPECT_FILE_OPENED(kSuccess)  // The first Open() succeeded.
 341   END_TEST_CASE
 342
 343   START_TEST_CASE("ReopenFileInSeparateFileIO")
 344     OPEN_FILE
 345     EXPECT_FILE_OPENED(kSuccess)
 346     WRITE_FILE(kData, kDataSize)
 347     EXPECT_FILE_WRITTEN(kSuccess)
 348     CREATE_FILE_IO  // Create a second FileIO without closing the first one.
 349     OPEN_FILE
 350     EXPECT_FILE_OPENED(kInUse)
 351   END_TEST_CASE
 352
 353   START_TEST_CASE("CloseAfterCreation")
 354     CLOSE_FILE
 355   END_TEST_CASE
 356
 357   START_TEST_CASE("CloseDuringPendingOpen")
 358     OPEN_FILE
 359     CLOSE_FILE
 360   END_TEST_CASE
 361
 362   START_TEST_CASE("CloseDuringPendingWrite")
 363     OPEN_FILE
 364     EXPECT_FILE_OPENED(kSuccess)
 365     // TODO(xhwang): Reenable this after http:://crbug.com/415401 is fixed.
 366     // WRITE_FILE(kData, kDataSize)
 367     CLOSE_FILE
 368   END_TEST_CASE
 369
 370   START_TEST_CASE("CloseDuringPendingOverwriteWithLargerData")
 371     OPEN_FILE
 372     EXPECT_FILE_OPENED(kSuccess)
 373     WRITE_FILE(kData, kDataSize)
 374     EXPECT_FILE_WRITTEN(kSuccess)
 375     // TODO(xhwang): Reenable this after http:://crbug.com/415401 is fixed.
 376     // WRITE_FILE(kBigData, kBigDataSize)
 377     CLOSE_FILE
 378     // Write() didn't finish and the content of the file is not modified.
 379     CREATE_FILE_IO
 380     OPEN_FILE
 381     EXPECT_FILE_OPENED(kSuccess)
 382     READ_FILE
 383     EXPECT_FILE_READ(kSuccess, kData, kDataSize)
 384   END_TEST_CASE
 385
 386   START_TEST_CASE("CloseDuringPendingOverwriteWithSmallerData")
 387     OPEN_FILE
 388     EXPECT_FILE_OPENED(kSuccess)
 389     WRITE_FILE(kBigData, kBigDataSize)
 390     EXPECT_FILE_WRITTEN(kSuccess)
 391     // TODO(xhwang): Reenable this after http:://crbug.com/415401 is fixed.
 392     // WRITE_FILE(kData, kDataSize)
 393     CLOSE_FILE
 394     // Write() didn't finish and the content of the file is not modified.
 395     CREATE_FILE_IO
 396     OPEN_FILE
 397     EXPECT_FILE_OPENED(kSuccess)
 398     READ_FILE
 399     EXPECT_FILE_READ(kSuccess, kBigData, kBigDataSize)
 400   END_TEST_CASE
 401
 402   START_TEST_CASE("CloseDuringPendingRead")
 403     OPEN_FILE
 404     EXPECT_FILE_OPENED(kSuccess)
 405     WRITE_FILE(kData, kDataSize)
 406     EXPECT_FILE_WRITTEN(kSuccess)
 407     // TODO(xhwang): Reenable this after http:://crbug.com/415401 is fixed.
 408     // READ_FILE
 409     CLOSE_FILE
 410     // Make sure the file is not modified.
 411     CREATE_FILE_IO
 412     OPEN_FILE
 413     EXPECT_FILE_OPENED(kSuccess)
 414     READ_FILE
 415     EXPECT_FILE_READ(kSuccess, kData, kDataSize)
 416   END_TEST_CASE
 417
 418   START_TEST_CASE("StressTest")
 419     for (int i = 0; i < 100; ++i) {
 420       CREATE_FILE_IO
 421       OPEN_FILE
 422       EXPECT_FILE_OPENED(kSuccess)
 423       WRITE_FILE(kData, kDataSize)
 424       EXPECT_FILE_WRITTEN(kSuccess)
 425       // TODO(xhwang): Reenable this after http:://crbug.com/415401 is fixed.
 426       // WRITE_FILE(kBigData, kBigDataSize)
 427       CLOSE_FILE
 428       // Make sure the file is not modified.
 429       CREATE_FILE_IO
 430       OPEN_FILE
 431       EXPECT_FILE_OPENED(kSuccess)
 432       READ_FILE
 433       EXPECT_FILE_READ(kSuccess, kData, kDataSize)
 434       CLOSE_FILE
 435     }
 436   END_TEST_CASE
 437 }
 438
 439 void FileIOTestRunner::RunAllTests(const CompletionCB& completion_cb) {
 440   completion_cb_ = completion_cb;
 441   total_num_tests_ = remaining_tests_.size();
 442   RunNextTest();
 443 }
 444
 445 void FileIOTestRunner::RunNextTest() {
 446   if (remaining_tests_.empty()) {
 447     FILE_IO_DVLOG(1) << num_passed_tests_ << " passed and "
 448                      << (total_num_tests_ - num_passed_tests_) << " failed in "
 449                      << total_num_tests_ << " tests.";
 450     bool success = (num_passed_tests_ == total_num_tests_);
 451     base::ResetAndReturn(&completion_cb_).Run(success);
 452     return;
 453   }
 454
 455   remaining_tests_.front().Run(
 456       base::Bind(&FileIOTestRunner::OnTestComplete, base::Unretained(this)));
 457 }
 458
 459 void FileIOTestRunner::OnTestComplete(bool success) {
 460   if (success)
 461     num_passed_tests_++;
 462   remaining_tests_.pop_front();
 463   RunNextTest();
 464 }
 465
 466 // FileIOTest implementation.
 467
 468 FileIOTest::FileIOTest(const CreateFileIOCB& create_file_io_cb,
 469                        const std::string& test_name)
 470     : create_file_io_cb_(create_file_io_cb),
 471       test_name_(test_name) {}
 472
 473 FileIOTest::~FileIOTest() {}
 474
 475 void FileIOTest::AddTestStep(
 476     StepType type, Status status, const uint8* data, uint32 data_size) {
 477   test_steps_.push_back(TestStep(type, status, data, data_size));
 478 }
 479
 480 void FileIOTest::Run(const CompletionCB& completion_cb) {
 481   FILE_IO_DVLOG(3) << "Run " << test_name_;
 482   completion_cb_ = completion_cb;
 483   DCHECK(!test_steps_.empty() && !IsResult(test_steps_.front()));
 484   RunNextStep();
 485 }
 486
 487 void FileIOTest::OnOpenComplete(Status status) {
 488   OnResult(TestStep(RESULT_OPEN, status, NULL, 0));
 489 }
 490
 491 void FileIOTest::OnReadComplete(Status status,
 492                                 const uint8_t* data,
 493                                 uint32_t data_size) {
 494   OnResult(TestStep(RESULT_READ, status, data, data_size));
 495 }
 496
 497 void FileIOTest::OnWriteComplete(Status status) {
 498   OnResult(TestStep(RESULT_WRITE, status, NULL, 0));
 499 }
 500
 501 bool FileIOTest::IsResult(const TestStep& test_step) {
 502   switch (test_step.type) {
 503     case RESULT_OPEN:
 504     case RESULT_READ:
 505     case RESULT_WRITE:
 506       return true;
 507     case ACTION_CREATE:
 508     case ACTION_OPEN:
 509     case ACTION_READ:
 510     case ACTION_WRITE:
 511     case ACTION_CLOSE:
 512       return false;
 513   }
 514   NOTREACHED();
 515   return false;
 516 }
 517
 518 bool FileIOTest::MatchesResult(const TestStep& a, const TestStep& b) {
 519   DCHECK(IsResult(a) && IsResult(b));
 520   if (a.type != b.type || a.status != b.status)
 521     return false;
 522
 523   if (a.type != RESULT_READ || a.status != cdm::FileIOClient::kSuccess)
 524     return true;
 525
 526   return (a.data_size == b.data_size &&
 527           std::equal(a.data, a.data + a.data_size, b.data));
 528 }
 529
 530 void FileIOTest::RunNextStep() {
 531   // Run all actions in the current action group.
 532   while (!test_steps_.empty()) {
 533     // Start to wait for test results when the next step is a test result.
 534     if (IsResult(test_steps_.front()))
 535       return;
 536
 537     TestStep test_step = test_steps_.front();
 538     test_steps_.pop_front();
 539
 540     cdm::FileIO* file_io = file_io_stack_.empty()? NULL : file_io_stack_.top();
 541
 542     switch (test_step.type) {
 543       case ACTION_CREATE:
 544         file_io = create_file_io_cb_.Run(this);
 545         if (!file_io) {
 546           FILE_IO_DVLOG(3) << "Cannot create FileIO object.";
 547           OnTestComplete(false);
 548           return;
 549         }
 550         file_io_stack_.push(file_io);
 551         break;
 552       case ACTION_OPEN:
 553         // Use test name as the test file name.
 554         file_io->Open(test_name_.data(), test_name_.size());
 555         break;
 556       case ACTION_READ:
 557         file_io->Read();
 558         break;
 559       case ACTION_WRITE:
 560         file_io->Write(test_step.data, test_step.data_size);
 561         break;
 562       case ACTION_CLOSE:
 563         file_io->Close();
 564         file_io_stack_.pop();
 565         break;
 566       default:
 567         NOTREACHED();
 568     }
 569   }
 570
 571   OnTestComplete(true);
 572 }
 573
 574 void FileIOTest::OnResult(const TestStep& result) {
 575   DCHECK(IsResult(result));
 576   if (!CheckResult(result)) {
 577     OnTestComplete(false);
 578     return;
 579   }
 580
 581   RunNextStep();
 582 }
 583
 584 bool FileIOTest::CheckResult(const TestStep& result) {
 585   if (test_steps_.empty() || !IsResult(test_steps_.front()))
 586     return false;
 587
 588   // If there are multiple results expected, the order does not matter.
 589   std::list<TestStep>::iterator iter = test_steps_.begin();
 590   for (; iter != test_steps_.end(); ++iter) {
 591     if (!IsResult(*iter))
 592       return false;
 593
 594     if (!MatchesResult(*iter, result))
 595       continue;
 596
 597     test_steps_.erase(iter);
 598     return true;
 599   }
 600
 601   return false;
 602 }
 603
 604 void FileIOTest::OnTestComplete(bool success) {
 605   while (!file_io_stack_.empty()) {
 606     file_io_stack_.top()->Close();
 607     file_io_stack_.pop();
 608   }
 609   FILE_IO_DVLOG(3) << test_name_ << (success ? " PASSED" : " FAILED");
 610   base::ResetAndReturn(&completion_cb_).Run(success);
 611 }
 612
 613 }  // namespace media