src/content/browser/appcache/appcache_response_unittest.cc

   1 // Copyright 2014 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 <stack>
   6 #include <string>
   7 #include <utility>
   8
   9 #include "base/bind.h"
  10 #include "base/bind_helpers.h"
  11 #include "base/callback.h"
  12 #include "base/compiler_specific.h"
  13 #include "base/pickle.h"
  14 #include "base/synchronization/waitable_event.h"
  15 #include "base/threading/thread.h"
  16 #include "content/browser/appcache/appcache_response.h"
  17 #include "content/browser/appcache/mock_appcache_service.h"
  18 #include "net/base/io_buffer.h"
  19 #include "net/base/net_errors.h"
  20 #include "net/http/http_response_headers.h"
  21 #include "testing/gtest/include/gtest/gtest.h"
  22
  23 using net::IOBuffer;
  24 using net::WrappedIOBuffer;
  25
  26 namespace content {
  27
  28 static const int kNumBlocks = 4;
  29 static const int kBlockSize = 1024;
  30 static const int kNoSuchResponseId = 123;
  31
  32 class AppCacheResponseTest : public testing::Test {
  33  public:
  34   // Test Harness -------------------------------------------------------------
  35
  36   // Helper class used to verify test results
  37   class MockStorageDelegate : public AppCacheStorage::Delegate {
  38    public:
  39     explicit MockStorageDelegate(AppCacheResponseTest* test)
  40         : loaded_info_id_(0), test_(test) {
  41     }
  42
  43     virtual void OnResponseInfoLoaded(AppCacheResponseInfo* info,
  44                                       int64 response_id) OVERRIDE {
  45       loaded_info_ = info;
  46       loaded_info_id_ = response_id;
  47       test_->ScheduleNextTask();
  48     }
  49
  50     scoped_refptr<AppCacheResponseInfo> loaded_info_;
  51     int64 loaded_info_id_;
  52     AppCacheResponseTest* test_;
  53   };
  54
  55   // Helper callback to run a test on our io_thread. The io_thread is spun up
  56   // once and reused for all tests.
  57   template <class Method>
  58   void MethodWrapper(Method method) {
  59     SetUpTest();
  60     (this->*method)();
  61   }
  62
  63   static void SetUpTestCase() {
  64     io_thread_.reset(new base::Thread("AppCacheResponseTest Thread"));
  65     base::Thread::Options options(base::MessageLoop::TYPE_IO, 0);
  66     io_thread_->StartWithOptions(options);
  67   }
  68
  69   static void TearDownTestCase() {
  70     io_thread_.reset(NULL);
  71   }
  72
  73   AppCacheResponseTest() {}
  74
  75   template <class Method>
  76   void RunTestOnIOThread(Method method) {
  77     test_finished_event_ .reset(new base::WaitableEvent(false, false));
  78     io_thread_->message_loop()->PostTask(
  79         FROM_HERE, base::Bind(&AppCacheResponseTest::MethodWrapper<Method>,
  80                               base::Unretained(this), method));
  81     test_finished_event_->Wait();
  82   }
  83
  84   void SetUpTest() {
  85     DCHECK(base::MessageLoop::current() == io_thread_->message_loop());
  86     DCHECK(task_stack_.empty());
  87     storage_delegate_.reset(new MockStorageDelegate(this));
  88     service_.reset(new MockAppCacheService());
  89     expected_read_result_ = 0;
  90     expected_write_result_ = 0;
  91     written_response_id_ = 0;
  92     should_delete_reader_in_completion_callback_ = false;
  93     should_delete_writer_in_completion_callback_ = false;
  94     reader_deletion_count_down_ = 0;
  95     writer_deletion_count_down_ = 0;
  96     read_callback_was_called_ = false;
  97     write_callback_was_called_ = false;
  98   }
  99
 100   void TearDownTest() {
 101     DCHECK(base::MessageLoop::current() == io_thread_->message_loop());
 102     while (!task_stack_.empty())
 103       task_stack_.pop();
 104
 105     reader_.reset();
 106     read_buffer_ = NULL;
 107     read_info_buffer_ = NULL;
 108     writer_.reset();
 109     write_buffer_ = NULL;
 110     write_info_buffer_ = NULL;
 111     storage_delegate_.reset();
 112     service_.reset();
 113   }
 114
 115   void TestFinished() {
 116     // We unwind the stack prior to finishing up to let stack
 117     // based objects get deleted.
 118     DCHECK(base::MessageLoop::current() == io_thread_->message_loop());
 119     base::MessageLoop::current()->PostTask(
 120         FROM_HERE, base::Bind(&AppCacheResponseTest::TestFinishedUnwound,
 121                               base::Unretained(this)));
 122   }
 123
 124   void TestFinishedUnwound() {
 125     TearDownTest();
 126     test_finished_event_->Signal();
 127   }
 128
 129   void PushNextTask(const base::Closure& task) {
 130     task_stack_.push(std::pair<base::Closure, bool>(task, false));
 131   }
 132
 133   void PushNextTaskAsImmediate(const base::Closure& task) {
 134     task_stack_.push(std::pair<base::Closure, bool>(task, true));
 135   }
 136
 137   void ScheduleNextTask() {
 138     DCHECK(base::MessageLoop::current() == io_thread_->message_loop());
 139     if (task_stack_.empty()) {
 140       TestFinished();
 141       return;
 142     }
 143     base::Closure task = task_stack_.top().first;
 144     bool immediate = task_stack_.top().second;
 145     task_stack_.pop();
 146     if (immediate)
 147       task.Run();
 148     else
 149       base::MessageLoop::current()->PostTask(FROM_HERE, task);
 150   }
 151
 152   // Wrappers to call AppCacheResponseReader/Writer Read and Write methods
 153
 154   void WriteBasicResponse() {
 155     static const char kHttpHeaders[] =
 156         "HTTP/1.0 200 OK\0Content-Length: 5\0\0";
 157     static const char kHttpBody[] = "Hello";
 158     scoped_refptr<IOBuffer> body(new WrappedIOBuffer(kHttpBody));
 159     std::string raw_headers(kHttpHeaders, arraysize(kHttpHeaders));
 160     WriteResponse(
 161         MakeHttpResponseInfo(raw_headers), body.get(), strlen(kHttpBody));
 162   }
 163
 164   int basic_response_size() { return 5; }  // should match kHttpBody above
 165
 166   void WriteResponse(net::HttpResponseInfo* head,
 167                      IOBuffer* body, int body_len) {
 168     DCHECK(body);
 169     scoped_refptr<IOBuffer> body_ref(body);
 170     PushNextTask(base::Bind(&AppCacheResponseTest::WriteResponseBody,
 171                             base::Unretained(this), body_ref, body_len));
 172     WriteResponseHead(head);
 173   }
 174
 175   void WriteResponseHead(net::HttpResponseInfo* head) {
 176     EXPECT_FALSE(writer_->IsWritePending());
 177     expected_write_result_ = GetHttpResponseInfoSize(head);
 178     write_info_buffer_ = new HttpResponseInfoIOBuffer(head);
 179     writer_->WriteInfo(write_info_buffer_.get(),
 180                        base::Bind(&AppCacheResponseTest::OnWriteInfoComplete,
 181                                   base::Unretained(this)));
 182   }
 183
 184   void WriteResponseBody(scoped_refptr<IOBuffer> io_buffer, int buf_len) {
 185     EXPECT_FALSE(writer_->IsWritePending());
 186     write_buffer_ = io_buffer;
 187     expected_write_result_ = buf_len;
 188     writer_->WriteData(write_buffer_.get(),
 189                        buf_len,
 190                        base::Bind(&AppCacheResponseTest::OnWriteComplete,
 191                                   base::Unretained(this)));
 192   }
 193
 194   void ReadResponseBody(scoped_refptr<IOBuffer> io_buffer, int buf_len) {
 195     EXPECT_FALSE(reader_->IsReadPending());
 196     read_buffer_ = io_buffer;
 197     expected_read_result_ = buf_len;
 198     reader_->ReadData(read_buffer_.get(),
 199                       buf_len,
 200                       base::Bind(&AppCacheResponseTest::OnReadComplete,
 201                                  base::Unretained(this)));
 202   }
 203
 204   // AppCacheResponseReader / Writer completion callbacks
 205
 206   void OnWriteInfoComplete(int result) {
 207     EXPECT_FALSE(writer_->IsWritePending());
 208     EXPECT_EQ(expected_write_result_, result);
 209     ScheduleNextTask();
 210   }
 211
 212   void OnWriteComplete(int result) {
 213     EXPECT_FALSE(writer_->IsWritePending());
 214     write_callback_was_called_ = true;
 215     EXPECT_EQ(expected_write_result_, result);
 216     if (should_delete_writer_in_completion_callback_ &&
 217         --writer_deletion_count_down_ == 0) {
 218       writer_.reset();
 219     }
 220     ScheduleNextTask();
 221   }
 222
 223   void OnReadInfoComplete(int result) {
 224     EXPECT_FALSE(reader_->IsReadPending());
 225     EXPECT_EQ(expected_read_result_, result);
 226     ScheduleNextTask();
 227   }
 228
 229   void OnReadComplete(int result) {
 230     EXPECT_FALSE(reader_->IsReadPending());
 231     read_callback_was_called_ = true;
 232     EXPECT_EQ(expected_read_result_, result);
 233     if (should_delete_reader_in_completion_callback_ &&
 234         --reader_deletion_count_down_ == 0) {
 235       reader_.reset();
 236     }
 237     ScheduleNextTask();
 238   }
 239
 240   // Helpers to work with HttpResponseInfo objects
 241
 242   net::HttpResponseInfo* MakeHttpResponseInfo(const std::string& raw_headers) {
 243     net::HttpResponseInfo* info = new net::HttpResponseInfo;
 244     info->request_time = base::Time::Now();
 245     info->response_time = base::Time::Now();
 246     info->was_cached = false;
 247     info->headers = new net::HttpResponseHeaders(raw_headers);
 248     return info;
 249   }
 250
 251   int GetHttpResponseInfoSize(const net::HttpResponseInfo* info) {
 252     Pickle pickle;
 253     return PickleHttpResonseInfo(&pickle, info);
 254   }
 255
 256   bool CompareHttpResponseInfos(const net::HttpResponseInfo* info1,
 257                                 const net::HttpResponseInfo* info2) {
 258     Pickle pickle1;
 259     Pickle pickle2;
 260     PickleHttpResonseInfo(&pickle1, info1);
 261     PickleHttpResonseInfo(&pickle2, info2);
 262     return (pickle1.size() == pickle2.size()) &&
 263            (0 == memcmp(pickle1.data(), pickle2.data(), pickle1.size()));
 264   }
 265
 266   int PickleHttpResonseInfo(Pickle* pickle, const net::HttpResponseInfo* info) {
 267     const bool kSkipTransientHeaders = true;
 268     const bool kTruncated = false;
 269     info->Persist(pickle, kSkipTransientHeaders, kTruncated);
 270     return pickle->size();
 271   }
 272
 273   // Helpers to fill and verify blocks of memory with a value
 274
 275   void FillData(char value, char* data, int data_len) {
 276     memset(data, value, data_len);
 277   }
 278
 279   bool CheckData(char value, const char* data, int data_len) {
 280     for (int i = 0; i < data_len; ++i, ++data) {
 281       if (*data != value)
 282         return false;
 283     }
 284     return true;
 285   }
 286
 287   // Individual Tests ---------------------------------------------------------
 288   // Most of the individual tests involve multiple async steps. Each test
 289   // is delineated with a section header.
 290
 291
 292   // ReadNonExistentResponse -------------------------------------------
 293   void ReadNonExistentResponse() {
 294     // 1. Attempt to ReadInfo
 295     // 2. Attempt to ReadData
 296
 297     reader_.reset(service_->storage()->CreateResponseReader(
 298         GURL(), 0, kNoSuchResponseId));
 299
 300     // Push tasks in reverse order
 301     PushNextTask(base::Bind(&AppCacheResponseTest::ReadNonExistentData,
 302                             base::Unretained(this)));
 303     PushNextTask(base::Bind(&AppCacheResponseTest::ReadNonExistentInfo,
 304                             base::Unretained(this)));
 305     ScheduleNextTask();
 306   }
 307
 308   void ReadNonExistentInfo() {
 309     EXPECT_FALSE(reader_->IsReadPending());
 310     read_info_buffer_ = new HttpResponseInfoIOBuffer();
 311     reader_->ReadInfo(read_info_buffer_.get(),
 312                       base::Bind(&AppCacheResponseTest::OnReadInfoComplete,
 313                                  base::Unretained(this)));
 314     EXPECT_TRUE(reader_->IsReadPending());
 315     expected_read_result_ = net::ERR_CACHE_MISS;
 316   }
 317
 318   void ReadNonExistentData() {
 319     EXPECT_FALSE(reader_->IsReadPending());
 320     read_buffer_ = new IOBuffer(kBlockSize);
 321     reader_->ReadData(read_buffer_.get(),
 322                       kBlockSize,
 323                       base::Bind(&AppCacheResponseTest::OnReadComplete,
 324                                  base::Unretained(this)));
 325     EXPECT_TRUE(reader_->IsReadPending());
 326     expected_read_result_ = net::ERR_CACHE_MISS;
 327   }
 328
 329   // LoadResponseInfo_Miss ----------------------------------------------------
 330   void LoadResponseInfo_Miss() {
 331     PushNextTask(base::Bind(&AppCacheResponseTest::LoadResponseInfo_Miss_Verify,
 332                             base::Unretained(this)));
 333     service_->storage()->LoadResponseInfo(GURL(), 0, kNoSuchResponseId,
 334                                           storage_delegate_.get());
 335   }
 336
 337   void LoadResponseInfo_Miss_Verify() {
 338     EXPECT_EQ(kNoSuchResponseId, storage_delegate_->loaded_info_id_);
 339     EXPECT_TRUE(!storage_delegate_->loaded_info_.get());
 340     TestFinished();
 341   }
 342
 343   // LoadResponseInfo_Hit ----------------------------------------------------
 344   void LoadResponseInfo_Hit() {
 345     // This tests involves multiple async steps.
 346     // 1. Write a response headers and body to storage
 347     //   a. headers
 348     //   b. body
 349     // 2. Use LoadResponseInfo to read the response headers back out
 350     PushNextTask(base::Bind(&AppCacheResponseTest::LoadResponseInfo_Hit_Step2,
 351                             base::Unretained(this)));
 352     writer_.reset(service_->storage()->CreateResponseWriter(GURL(), 0));
 353     written_response_id_ = writer_->response_id();
 354     WriteBasicResponse();
 355   }
 356
 357   void LoadResponseInfo_Hit_Step2() {
 358     writer_.reset();
 359     PushNextTask(base::Bind(&AppCacheResponseTest::LoadResponseInfo_Hit_Verify,
 360                             base::Unretained(this)));
 361     service_->storage()->LoadResponseInfo(GURL(), 0, written_response_id_,
 362                                           storage_delegate_.get());
 363   }
 364
 365   void LoadResponseInfo_Hit_Verify() {
 366     EXPECT_EQ(written_response_id_, storage_delegate_->loaded_info_id_);
 367     EXPECT_TRUE(storage_delegate_->loaded_info_.get());
 368     EXPECT_TRUE(CompareHttpResponseInfos(
 369         write_info_buffer_->http_info.get(),
 370         storage_delegate_->loaded_info_->http_response_info()));
 371     EXPECT_EQ(basic_response_size(),
 372               storage_delegate_->loaded_info_->response_data_size());
 373     TestFinished();
 374   }
 375
 376   // AmountWritten ----------------------------------------------------
 377
 378   void AmountWritten() {
 379     static const char kHttpHeaders[] = "HTTP/1.0 200 OK\0\0";
 380     std::string raw_headers(kHttpHeaders, arraysize(kHttpHeaders));
 381     net::HttpResponseInfo* head = MakeHttpResponseInfo(raw_headers);
 382     int expected_amount_written =
 383         GetHttpResponseInfoSize(head) + kNumBlocks * kBlockSize;
 384
 385     // Push tasks in reverse order.
 386     PushNextTask(base::Bind(&AppCacheResponseTest::Verify_AmountWritten,
 387                             base::Unretained(this), expected_amount_written));
 388     for (int i = 0; i < kNumBlocks; ++i) {
 389       PushNextTask(base::Bind(&AppCacheResponseTest::WriteOneBlock,
 390                               base::Unretained(this), kNumBlocks - i));
 391     }
 392     PushNextTask(base::Bind(&AppCacheResponseTest::WriteResponseHead,
 393                             base::Unretained(this), head));
 394
 395     writer_.reset(service_->storage()->CreateResponseWriter(GURL(), 0));
 396     written_response_id_ = writer_->response_id();
 397     ScheduleNextTask();
 398   }
 399
 400   void Verify_AmountWritten(int expected_amount_written) {
 401     EXPECT_EQ(expected_amount_written, writer_->amount_written());
 402     TestFinished();
 403   }
 404
 405
 406   // WriteThenVariouslyReadResponse -------------------------------------------
 407
 408   void WriteThenVariouslyReadResponse() {
 409     // This tests involves multiple async steps.
 410     // 1. First, write a large body using multiple writes, we don't bother
 411     //    with a response head for this test.
 412     // 2. Read the entire body, using multiple reads
 413     // 3. Read the entire body, using one read.
 414     // 4. Attempt to read beyond the EOF.
 415     // 5. Read just a range.
 416     // 6. Attempt to read beyond EOF of a range.
 417
 418     // Push tasks in reverse order
 419     PushNextTask(base::Bind(&AppCacheResponseTest::ReadRangeFullyBeyondEOF,
 420                             base::Unretained(this)));
 421     PushNextTask(base::Bind(&AppCacheResponseTest::ReadRangePartiallyBeyondEOF,
 422                             base::Unretained(this)));
 423     PushNextTask(base::Bind(&AppCacheResponseTest::ReadPastEOF,
 424                             base::Unretained(this)));
 425     PushNextTask(base::Bind(&AppCacheResponseTest::ReadRange,
 426                             base::Unretained(this)));
 427     PushNextTask(base::Bind(&AppCacheResponseTest::ReadPastEOF,
 428                             base::Unretained(this)));
 429     PushNextTask(base::Bind(&AppCacheResponseTest::ReadAllAtOnce,
 430                             base::Unretained(this)));
 431     PushNextTask(base::Bind(&AppCacheResponseTest::ReadInBlocks,
 432                             base::Unretained(this)));
 433     PushNextTask(base::Bind(&AppCacheResponseTest::WriteOutBlocks,
 434                             base::Unretained(this)));
 435
 436     // Get them going.
 437     ScheduleNextTask();
 438   }
 439
 440   void WriteOutBlocks() {
 441     writer_.reset(service_->storage()->CreateResponseWriter(GURL(), 0));
 442     written_response_id_ = writer_->response_id();
 443     for (int i = 0; i < kNumBlocks; ++i) {
 444       PushNextTask(base::Bind(&AppCacheResponseTest::WriteOneBlock,
 445                               base::Unretained(this), kNumBlocks - i));
 446     }
 447     ScheduleNextTask();
 448   }
 449
 450   void WriteOneBlock(int block_number) {
 451     scoped_refptr<IOBuffer> io_buffer(
 452         new IOBuffer(kBlockSize));
 453     FillData(block_number, io_buffer->data(), kBlockSize);
 454     WriteResponseBody(io_buffer, kBlockSize);
 455   }
 456
 457   void ReadInBlocks() {
 458     writer_.reset();
 459     reader_.reset(service_->storage()->CreateResponseReader(
 460         GURL(), 0, written_response_id_));
 461     for (int i = 0; i < kNumBlocks; ++i) {
 462       PushNextTask(base::Bind(&AppCacheResponseTest::ReadOneBlock,
 463                               base::Unretained(this), kNumBlocks - i));
 464     }
 465     ScheduleNextTask();
 466   }
 467
 468   void ReadOneBlock(int block_number) {
 469     PushNextTask(base::Bind(&AppCacheResponseTest::VerifyOneBlock,
 470                             base::Unretained(this), block_number));
 471     ReadResponseBody(new IOBuffer(kBlockSize), kBlockSize);
 472   }
 473
 474   void VerifyOneBlock(int block_number) {
 475     EXPECT_TRUE(CheckData(block_number, read_buffer_->data(), kBlockSize));
 476     ScheduleNextTask();
 477   }
 478
 479   void ReadAllAtOnce() {
 480     PushNextTask(base::Bind(&AppCacheResponseTest::VerifyAllAtOnce,
 481                             base::Unretained(this)));
 482     reader_.reset(service_->storage()->CreateResponseReader(
 483         GURL(), 0, written_response_id_));
 484     int big_size = kNumBlocks * kBlockSize;
 485     ReadResponseBody(new IOBuffer(big_size), big_size);
 486   }
 487
 488   void VerifyAllAtOnce() {
 489     char* p = read_buffer_->data();
 490     for (int i = 0; i < kNumBlocks; ++i, p += kBlockSize)
 491       EXPECT_TRUE(CheckData(i + 1, p, kBlockSize));
 492     ScheduleNextTask();
 493   }
 494
 495   void ReadPastEOF() {
 496     EXPECT_FALSE(reader_->IsReadPending());
 497     read_buffer_ = new IOBuffer(kBlockSize);
 498     expected_read_result_ = 0;
 499     reader_->ReadData(read_buffer_.get(),
 500                       kBlockSize,
 501                       base::Bind(&AppCacheResponseTest::OnReadComplete,
 502                                  base::Unretained(this)));
 503   }
 504
 505   void ReadRange() {
 506     PushNextTask(base::Bind(&AppCacheResponseTest::VerifyRange,
 507                             base::Unretained(this)));
 508     reader_.reset(service_->storage()->CreateResponseReader(
 509         GURL(), 0, written_response_id_));
 510     reader_->SetReadRange(kBlockSize, kBlockSize);
 511     ReadResponseBody(new IOBuffer(kBlockSize), kBlockSize);
 512   }
 513
 514   void VerifyRange() {
 515     EXPECT_TRUE(CheckData(2, read_buffer_->data(), kBlockSize));
 516     ScheduleNextTask();  // ReadPastEOF is scheduled next
 517   }
 518
 519   void ReadRangePartiallyBeyondEOF() {
 520     PushNextTask(base::Bind(&AppCacheResponseTest::VerifyRangeBeyondEOF,
 521                             base::Unretained(this)));
 522     reader_.reset(service_->storage()->CreateResponseReader(
 523         GURL(), 0, written_response_id_));
 524     reader_->SetReadRange(kBlockSize, kNumBlocks * kBlockSize);
 525     ReadResponseBody(new IOBuffer(kNumBlocks * kBlockSize),
 526                      kNumBlocks * kBlockSize);
 527     expected_read_result_ = (kNumBlocks - 1) * kBlockSize;
 528   }
 529
 530   void VerifyRangeBeyondEOF() {
 531     // Just verify the first 1k
 532     VerifyRange();
 533   }
 534
 535   void ReadRangeFullyBeyondEOF() {
 536     reader_.reset(service_->storage()->CreateResponseReader(
 537         GURL(), 0, written_response_id_));
 538     reader_->SetReadRange((kNumBlocks * kBlockSize) + 1, kBlockSize);
 539     ReadResponseBody(new IOBuffer(kBlockSize), kBlockSize);
 540     expected_read_result_ = 0;
 541   }
 542
 543   // IOChaining -------------------------------------------
 544   void IOChaining() {
 545     // 1. Write several blocks out initiating the subsequent write
 546     //    from within the completion callback of the previous write.
 547     // 2. Read and verify several blocks in similarly chaining reads.
 548
 549     // Push tasks in reverse order
 550     PushNextTaskAsImmediate(
 551         base::Bind(&AppCacheResponseTest::ReadInBlocksImmediately,
 552                    base::Unretained(this)));
 553     PushNextTaskAsImmediate(
 554         base::Bind(&AppCacheResponseTest::WriteOutBlocksImmediately,
 555                    base::Unretained(this)));
 556
 557     // Get them going.
 558     ScheduleNextTask();
 559   }
 560
 561   void WriteOutBlocksImmediately() {
 562     writer_.reset(service_->storage()->CreateResponseWriter(GURL(), 0));
 563     written_response_id_ = writer_->response_id();
 564     for (int i = 0; i < kNumBlocks; ++i) {
 565       PushNextTaskAsImmediate(
 566           base::Bind(&AppCacheResponseTest::WriteOneBlock,
 567                      base::Unretained(this), kNumBlocks - i));
 568     }
 569     ScheduleNextTask();
 570   }
 571
 572   void ReadInBlocksImmediately() {
 573     writer_.reset();
 574     reader_.reset(service_->storage()->CreateResponseReader(
 575         GURL(), 0, written_response_id_));
 576     for (int i = 0; i < kNumBlocks; ++i) {
 577       PushNextTaskAsImmediate(
 578           base::Bind(&AppCacheResponseTest::ReadOneBlockImmediately,
 579                      base::Unretained(this),
 580           kNumBlocks - i));
 581     }
 582     ScheduleNextTask();
 583   }
 584
 585   void ReadOneBlockImmediately(int block_number) {
 586     PushNextTaskAsImmediate(base::Bind(&AppCacheResponseTest::VerifyOneBlock,
 587                                        base::Unretained(this), block_number));
 588     ReadResponseBody(new IOBuffer(kBlockSize), kBlockSize);
 589   }
 590
 591   // DeleteWithinCallbacks -------------------------------------------
 592   void DeleteWithinCallbacks() {
 593     // 1. Write out a few blocks normally, and upon
 594     //    completion of the last write, delete the writer.
 595     // 2. Read in a few blocks normally, and upon completion
 596     //    of the last read, delete the reader.
 597
 598     should_delete_reader_in_completion_callback_ = true;
 599     reader_deletion_count_down_ = kNumBlocks;
 600     should_delete_writer_in_completion_callback_ = true;
 601     writer_deletion_count_down_ = kNumBlocks;
 602
 603     PushNextTask(base::Bind(&AppCacheResponseTest::ReadInBlocks,
 604                             base::Unretained(this)));
 605     PushNextTask(base::Bind(&AppCacheResponseTest::WriteOutBlocks,
 606                             base::Unretained(this)));
 607     ScheduleNextTask();
 608   }
 609
 610   // DeleteWithIOPending -------------------------------------------
 611   void DeleteWithIOPending() {
 612     // 1. Write a few blocks normally.
 613     // 2. Start a write, delete with it pending.
 614     // 3. Start a read, delete with it pending.
 615     PushNextTask(base::Bind(&AppCacheResponseTest::ReadThenDelete,
 616                             base::Unretained(this)));
 617     PushNextTask(base::Bind(&AppCacheResponseTest::WriteThenDelete,
 618                             base::Unretained(this)));
 619     PushNextTask(base::Bind(&AppCacheResponseTest::WriteOutBlocks,
 620                             base::Unretained(this)));
 621     ScheduleNextTask();
 622   }
 623
 624   void WriteThenDelete() {
 625     write_callback_was_called_ = false;
 626     WriteOneBlock(5);
 627     EXPECT_TRUE(writer_->IsWritePending());
 628     writer_.reset();
 629     ScheduleNextTask();
 630   }
 631
 632   void ReadThenDelete() {
 633     read_callback_was_called_ = false;
 634     reader_.reset(service_->storage()->CreateResponseReader(
 635         GURL(), 0, written_response_id_));
 636     ReadResponseBody(new IOBuffer(kBlockSize), kBlockSize);
 637     EXPECT_TRUE(reader_->IsReadPending());
 638     reader_.reset();
 639
 640     // Wait a moment to verify no callbacks.
 641     base::MessageLoop::current()->PostDelayedTask(
 642         FROM_HERE, base::Bind(&AppCacheResponseTest::VerifyNoCallbacks,
 643                               base::Unretained(this)),
 644         base::TimeDelta::FromMilliseconds(10));
 645   }
 646
 647   void VerifyNoCallbacks() {
 648     EXPECT_TRUE(!write_callback_was_called_);
 649     EXPECT_TRUE(!read_callback_was_called_);
 650     TestFinished();
 651   }
 652
 653   // Data members
 654
 655   scoped_ptr<base::WaitableEvent> test_finished_event_;
 656   scoped_ptr<MockStorageDelegate> storage_delegate_;
 657   scoped_ptr<MockAppCacheService> service_;
 658   std::stack<std::pair<base::Closure, bool> > task_stack_;
 659
 660   scoped_ptr<AppCacheResponseReader> reader_;
 661   scoped_refptr<HttpResponseInfoIOBuffer> read_info_buffer_;
 662   scoped_refptr<IOBuffer> read_buffer_;
 663   int expected_read_result_;
 664   bool should_delete_reader_in_completion_callback_;
 665   int reader_deletion_count_down_;
 666   bool read_callback_was_called_;
 667
 668   int64 written_response_id_;
 669   scoped_ptr<AppCacheResponseWriter> writer_;
 670   scoped_refptr<HttpResponseInfoIOBuffer> write_info_buffer_;
 671   scoped_refptr<IOBuffer> write_buffer_;
 672   int expected_write_result_;
 673   bool should_delete_writer_in_completion_callback_;
 674   int writer_deletion_count_down_;
 675   bool write_callback_was_called_;
 676
 677   static scoped_ptr<base::Thread> io_thread_;
 678 };
 679
 680 // static
 681 scoped_ptr<base::Thread> AppCacheResponseTest::io_thread_;
 682
 683 TEST_F(AppCacheResponseTest, ReadNonExistentResponse) {
 684   RunTestOnIOThread(&AppCacheResponseTest::ReadNonExistentResponse);
 685 }
 686
 687 TEST_F(AppCacheResponseTest, LoadResponseInfo_Miss) {
 688   RunTestOnIOThread(&AppCacheResponseTest::LoadResponseInfo_Miss);
 689 }
 690
 691 TEST_F(AppCacheResponseTest, LoadResponseInfo_Hit) {
 692   RunTestOnIOThread(&AppCacheResponseTest::LoadResponseInfo_Hit);
 693 }
 694
 695 TEST_F(AppCacheResponseTest, AmountWritten) {
 696   RunTestOnIOThread(&AppCacheResponseTest::AmountWritten);
 697 }
 698
 699 TEST_F(AppCacheResponseTest, WriteThenVariouslyReadResponse) {
 700   RunTestOnIOThread(&AppCacheResponseTest::WriteThenVariouslyReadResponse);
 701 }
 702
 703 TEST_F(AppCacheResponseTest, IOChaining) {
 704   RunTestOnIOThread(&AppCacheResponseTest::IOChaining);
 705 }
 706
 707 TEST_F(AppCacheResponseTest, DeleteWithinCallbacks) {
 708   RunTestOnIOThread(&AppCacheResponseTest::DeleteWithinCallbacks);
 709 }
 710
 711 TEST_F(AppCacheResponseTest, DeleteWithIOPending) {
 712   RunTestOnIOThread(&AppCacheResponseTest::DeleteWithIOPending);
 713 }
 714
 715 }  // namespace content