src/net/disk_cache/disk_cache_test_base.cc - cobalt - Git at Google

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

 #include "net/disk_cache/disk_cache_test_base.h"

 #include <utility>

 #include "base/files/file_util.h"
 #include "base/path_service.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/platform_thread.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
 #include "net/base/request_priority.h"
 #include "net/base/test_completion_callback.h"
 #include "net/disk_cache/backend_cleanup_tracker.h"
 #include "net/disk_cache/blockfile/backend_impl.h"
 #include "net/disk_cache/cache_util.h"
 #include "net/disk_cache/disk_cache.h"
 #include "net/disk_cache/disk_cache_test_util.h"
 #include "net/disk_cache/memory/mem_backend_impl.h"
 #include "net/disk_cache/simple/simple_backend_impl.h"
 #include "net/disk_cache/simple/simple_file_tracker.h"
 #include "net/disk_cache/simple/simple_index.h"
 #include "net/test/gtest_util.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"

 using net::test::IsOk;

 DiskCacheTest::DiskCacheTest() {
   CHECK(temp_dir_.CreateUniqueTempDir());
   cache_path_ = temp_dir_.GetPath();
 }

 DiskCacheTest::~DiskCacheTest() = default;

 #if !defined(STARBOARD)
 // Starboard does not support copy directory.
 bool DiskCacheTest::CopyTestCache(const std::string& name) {
   base::FilePath path;
   base::PathService::Get(base::DIR_SOURCE_ROOT_FOR_TESTING, &path);
   path = path.AppendASCII("net");
   path = path.AppendASCII("data");
   path = path.AppendASCII("cache_tests");
   path = path.AppendASCII(name);

   if (!CleanupCacheDir())
     return false;
   return base::CopyDirectory(path, cache_path_, false);
 }
 #endif

 bool DiskCacheTest::CleanupCacheDir() {
   return DeleteCache(cache_path_);
 }

 void DiskCacheTest::TearDown() {
   base::RunLoop().RunUntilIdle();
 }

 DiskCacheTestWithCache::TestIterator::TestIterator(
     std::unique_ptr<disk_cache::Backend::Iterator> iterator)
     : iterator_(std::move(iterator)) {}

 DiskCacheTestWithCache::TestIterator::~TestIterator() = default;

 int DiskCacheTestWithCache::TestIterator::OpenNextEntry(
     disk_cache::Entry** next_entry) {
   net::TestCompletionCallback cb;
   int rv = iterator_->OpenNextEntry(next_entry, cb.callback());
   return cb.GetResult(rv);
 }

 DiskCacheTestWithCache::DiskCacheTestWithCache()
     : cache_impl_(NULL),
       simple_cache_impl_(NULL),
       mem_cache_(NULL),
       mask_(0),
       size_(0),
       type_(net::DISK_CACHE),
       memory_only_(false),
       simple_cache_mode_(false),
       simple_cache_wait_for_index_(true),
       force_creation_(false),
       new_eviction_(false),
       first_cleanup_(true),
       integrity_(true),
       use_current_thread_(false) {}

 DiskCacheTestWithCache::~DiskCacheTestWithCache() = default;

 void DiskCacheTestWithCache::InitCache() {
   if (memory_only_)
     InitMemoryCache();
   else
     InitDiskCache();

   ASSERT_TRUE(NULL != cache_);
   if (first_cleanup_)
     ASSERT_EQ(0, cache_->GetEntryCount());
 }

 // We are expected to leak memory when simulating crashes.
 void DiskCacheTestWithCache::SimulateCrash() {
   ASSERT_TRUE(!memory_only_);
   net::TestCompletionCallback cb;
   int rv = cache_impl_->FlushQueueForTest(cb.callback());
   ASSERT_THAT(cb.GetResult(rv), IsOk());
   cache_impl_->ClearRefCountForTest();

   cache_.reset();
   EXPECT_TRUE(CheckCacheIntegrity(cache_path_, new_eviction_, size_, mask_));

   CreateBackend(disk_cache::kNoRandom);
 }

 void DiskCacheTestWithCache::SetTestMode() {
   ASSERT_TRUE(!memory_only_);
   cache_impl_->SetUnitTestMode();
 }

 void DiskCacheTestWithCache::SetMaxSize(int64_t size, bool should_succeed) {
   size_ = size;
   if (simple_cache_impl_)
     EXPECT_EQ(should_succeed, simple_cache_impl_->SetMaxSize(size));

   if (cache_impl_)
     EXPECT_EQ(should_succeed, cache_impl_->SetMaxSize(size));

   if (mem_cache_)
     EXPECT_EQ(should_succeed, mem_cache_->SetMaxSize(size));
 }

 int DiskCacheTestWithCache::OpenEntry(const std::string& key,
                                       disk_cache::Entry** entry) {
   return OpenEntryWithPriority(key, net::HIGHEST, entry);
 }

 int DiskCacheTestWithCache::OpenEntryWithPriority(
     const std::string& key,
     net::RequestPriority request_priority,
     disk_cache::Entry** entry) {
   net::TestCompletionCallback cb;
   int rv = cache_->OpenEntry(key, request_priority, entry, cb.callback());
   return cb.GetResult(rv);
 }

 int DiskCacheTestWithCache::CreateEntry(const std::string& key,
                                         disk_cache::Entry** entry) {
   return CreateEntryWithPriority(key, net::HIGHEST, entry);
 }

 int DiskCacheTestWithCache::CreateEntryWithPriority(
     const std::string& key,
     net::RequestPriority request_priority,
     disk_cache::Entry** entry) {
   net::TestCompletionCallback cb;
   int rv = cache_->CreateEntry(key, request_priority, entry, cb.callback());
   return cb.GetResult(rv);
 }

 int DiskCacheTestWithCache::DoomEntry(const std::string& key) {
   net::TestCompletionCallback cb;
   int rv = cache_->DoomEntry(key, net::HIGHEST, cb.callback());
   return cb.GetResult(rv);
 }

 int DiskCacheTestWithCache::DoomAllEntries() {
   net::TestCompletionCallback cb;
   int rv = cache_->DoomAllEntries(cb.callback());
   return cb.GetResult(rv);
 }

 int DiskCacheTestWithCache::DoomEntriesBetween(const base::Time initial_time,
                                                const base::Time end_time) {
   net::TestCompletionCallback cb;
   int rv = cache_->DoomEntriesBetween(initial_time, end_time, cb.callback());
   return cb.GetResult(rv);
 }

 int DiskCacheTestWithCache::DoomEntriesSince(const base::Time initial_time) {
   net::TestCompletionCallback cb;
   int rv = cache_->DoomEntriesSince(initial_time, cb.callback());
   return cb.GetResult(rv);
 }

 int64_t DiskCacheTestWithCache::CalculateSizeOfAllEntries() {
   net::TestInt64CompletionCallback cb;
   int64_t rv = cache_->CalculateSizeOfAllEntries(cb.callback());
   return cb.GetResult(rv);
 }

 int64_t DiskCacheTestWithCache::CalculateSizeOfEntriesBetween(
     const base::Time initial_time,
     const base::Time end_time) {
   net::TestInt64CompletionCallback cb;
   int64_t rv = cache_->CalculateSizeOfEntriesBetween(initial_time, end_time,
                                                      cb.callback());
   return cb.GetResult(rv);
 }

 std::unique_ptr<DiskCacheTestWithCache::TestIterator>
 DiskCacheTestWithCache::CreateIterator() {
   return std::unique_ptr<TestIterator>(
       new TestIterator(cache_->CreateIterator()));
 }

 void DiskCacheTestWithCache::FlushQueueForTest() {
   if (memory_only_ || !cache_impl_)
     return;

   net::TestCompletionCallback cb;
   int rv = cache_impl_->FlushQueueForTest(cb.callback());
   EXPECT_THAT(cb.GetResult(rv), IsOk());
 }

 void DiskCacheTestWithCache::RunTaskForTest(const base::Closure& closure) {
   if (memory_only_ || !cache_impl_) {
     closure.Run();
     return;
   }

   net::TestCompletionCallback cb;
   int rv = cache_impl_->RunTaskForTest(closure, cb.callback());
   EXPECT_THAT(cb.GetResult(rv), IsOk());
 }

 int DiskCacheTestWithCache::ReadData(disk_cache::Entry* entry, int index,
                                      int offset, net::IOBuffer* buf, int len) {
   net::TestCompletionCallback cb;
   int rv = entry->ReadData(index, offset, buf, len, cb.callback());
   return cb.GetResult(rv);
 }

 int DiskCacheTestWithCache::WriteData(disk_cache::Entry* entry, int index,
                                       int offset, net::IOBuffer* buf, int len,
                                       bool truncate) {
   net::TestCompletionCallback cb;
   int rv = entry->WriteData(index, offset, buf, len, cb.callback(), truncate);
   return cb.GetResult(rv);
 }

 int DiskCacheTestWithCache::ReadSparseData(disk_cache::Entry* entry,
                                            int64_t offset,
                                            net::IOBuffer* buf,
                                            int len) {
   net::TestCompletionCallback cb;
   int rv = entry->ReadSparseData(offset, buf, len, cb.callback());
   return cb.GetResult(rv);
 }

 int DiskCacheTestWithCache::WriteSparseData(disk_cache::Entry* entry,
                                             int64_t offset,
                                             net::IOBuffer* buf,
                                             int len) {
   net::TestCompletionCallback cb;
   int rv = entry->WriteSparseData(offset, buf, len, cb.callback());
   return cb.GetResult(rv);
 }

 void DiskCacheTestWithCache::TrimForTest(bool empty) {
   RunTaskForTest(base::Bind(&disk_cache::BackendImpl::TrimForTest,
                             base::Unretained(cache_impl_),
                             empty));
 }

 void DiskCacheTestWithCache::TrimDeletedListForTest(bool empty) {
   RunTaskForTest(base::Bind(&disk_cache::BackendImpl::TrimDeletedListForTest,
                             base::Unretained(cache_impl_),
                             empty));
 }

 void DiskCacheTestWithCache::AddDelay() {
   if (simple_cache_mode_) {
     // The simple cache uses second resolution for many timeouts, so it's safest
     // to advance by at least whole seconds before falling back into the normal
     // disk cache epsilon advance.
     const base::Time initial_time = base::Time::Now();
     do {
       base::PlatformThread::YieldCurrentThread();
     } while (base::Time::Now() -
              initial_time < base::TimeDelta::FromSeconds(1));
   }

   base::Time initial = base::Time::Now();
   while (base::Time::Now() <= initial) {
     base::PlatformThread::Sleep(base::TimeDelta::FromMilliseconds(1));
   };
 }

 void DiskCacheTestWithCache::TearDown() {
   RunUntilIdle();
   cache_.reset();

   if (!memory_only_ && !simple_cache_mode_ && integrity_) {
     EXPECT_TRUE(CheckCacheIntegrity(cache_path_, new_eviction_, size_, mask_));
   }
   RunUntilIdle();
   if (simple_cache_mode_ && simple_file_tracker_)
     EXPECT_TRUE(simple_file_tracker_->IsEmptyForTesting());

   DiskCacheTest::TearDown();
 }

 void DiskCacheTestWithCache::InitMemoryCache() {
   mem_cache_ = new disk_cache::MemBackendImpl(NULL);
   cache_.reset(mem_cache_);
   ASSERT_TRUE(cache_);

   if (size_)
     EXPECT_TRUE(mem_cache_->SetMaxSize(size_));

   ASSERT_TRUE(mem_cache_->Init());
 }

 void DiskCacheTestWithCache::InitDiskCache() {
   if (first_cleanup_)
     ASSERT_TRUE(CleanupCacheDir());

   CreateBackend(disk_cache::kNoRandom);
 }

 void DiskCacheTestWithCache::CreateBackend(uint32_t flags) {
   scoped_refptr<base::SingleThreadTaskRunner> runner;
   if (use_current_thread_)
     runner = base::ThreadTaskRunnerHandle::Get();
   else
     runner = nullptr;  // let the backend sort it out.

   if (simple_cache_mode_) {
     DCHECK(!use_current_thread_)
         << "Using current thread unsupported by SimpleCache";
     net::TestCompletionCallback cb;
     // We limit ourselves to 64 fds since OS X by default gives us 256.
     // (Chrome raises the number on startup, but the test fixture doesn't).
     if (!simple_file_tracker_)
       simple_file_tracker_ =
           std::make_unique<disk_cache::SimpleFileTracker>(64);
     std::unique_ptr<disk_cache::SimpleBackendImpl> simple_backend =
         std::make_unique<disk_cache::SimpleBackendImpl>(
             cache_path_, /* cleanup_tracker = */ nullptr,
             simple_file_tracker_.get(), size_, type_, /*net_log = */ nullptr);
     int rv = simple_backend->Init(cb.callback());
     ASSERT_THAT(cb.GetResult(rv), IsOk());
     simple_cache_impl_ = simple_backend.get();
     cache_ = std::move(simple_backend);
     if (simple_cache_wait_for_index_) {
       net::TestCompletionCallback wait_for_index_cb;
       rv = simple_cache_impl_->index()->ExecuteWhenReady(
           wait_for_index_cb.callback());
       ASSERT_THAT(wait_for_index_cb.GetResult(rv), IsOk());
     }
     return;
   }

   if (mask_)
     cache_impl_ = new disk_cache::BackendImpl(cache_path_, mask_, runner,
                                               /* net_log = */ nullptr);
   else
     cache_impl_ = new disk_cache::BackendImpl(cache_path_,
                                               /* cleanup_tracker = */ nullptr,
                                               runner, /* net_log = */ nullptr);
   cache_.reset(cache_impl_);
   ASSERT_TRUE(cache_);
   if (size_)
     EXPECT_TRUE(cache_impl_->SetMaxSize(size_));
   if (new_eviction_)
     cache_impl_->SetNewEviction();
   cache_impl_->SetType(type_);
   cache_impl_->SetFlags(flags);
   net::TestCompletionCallback cb;
   int rv = cache_impl_->Init(cb.callback());
   ASSERT_THAT(cb.GetResult(rv), IsOk());
 }
	// Copyright (c) 2012 The Chromium Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style license that can be
	// found in the LICENSE file.

	#include "net/disk_cache/disk_cache_test_base.h"

	#include <utility>

	#include "base/files/file_util.h"
	#include "base/path_service.h"
	#include "base/run_loop.h"
	#include "base/single_thread_task_runner.h"
	#include "base/threading/platform_thread.h"
	#include "base/threading/thread_task_runner_handle.h"
	#include "net/base/io_buffer.h"
	#include "net/base/net_errors.h"
	#include "net/base/request_priority.h"
	#include "net/base/test_completion_callback.h"
	#include "net/disk_cache/backend_cleanup_tracker.h"
	#include "net/disk_cache/blockfile/backend_impl.h"
	#include "net/disk_cache/cache_util.h"
	#include "net/disk_cache/disk_cache.h"
	#include "net/disk_cache/disk_cache_test_util.h"
	#include "net/disk_cache/memory/mem_backend_impl.h"
	#include "net/disk_cache/simple/simple_backend_impl.h"
	#include "net/disk_cache/simple/simple_file_tracker.h"
	#include "net/disk_cache/simple/simple_index.h"
	#include "net/test/gtest_util.h"
	#include "testing/gmock/include/gmock/gmock.h"
	#include "testing/gtest/include/gtest/gtest.h"

	using net::test::IsOk;

	DiskCacheTest::DiskCacheTest() {
	CHECK(temp_dir_.CreateUniqueTempDir());
	cache_path_ = temp_dir_.GetPath();
	}

	DiskCacheTest::~DiskCacheTest() = default;

	#if !defined(STARBOARD)
	// Starboard does not support copy directory.
	bool DiskCacheTest::CopyTestCache(const std::string& name) {
	base::FilePath path;
	base::PathService::Get(base::DIR_SOURCE_ROOT_FOR_TESTING, &path);
	path = path.AppendASCII("net");
	path = path.AppendASCII("data");
	path = path.AppendASCII("cache_tests");
	path = path.AppendASCII(name);

	if (!CleanupCacheDir())
	return false;
	return base::CopyDirectory(path, cache_path_, false);
	}
	#endif

	bool DiskCacheTest::CleanupCacheDir() {
	return DeleteCache(cache_path_);
	}

	void DiskCacheTest::TearDown() {
	base::RunLoop().RunUntilIdle();
	}

	DiskCacheTestWithCache::TestIterator::TestIterator(
	std::unique_ptr<disk_cache::Backend::Iterator> iterator)
	: iterator_(std::move(iterator)) {}

	DiskCacheTestWithCache::TestIterator::~TestIterator() = default;

	int DiskCacheTestWithCache::TestIterator::OpenNextEntry(
	disk_cache::Entry** next_entry) {
	net::TestCompletionCallback cb;
	int rv = iterator_->OpenNextEntry(next_entry, cb.callback());
	return cb.GetResult(rv);
	}

	DiskCacheTestWithCache::DiskCacheTestWithCache()
	: cache_impl_(NULL),
	simple_cache_impl_(NULL),
	mem_cache_(NULL),
	mask_(0),
	size_(0),
	type_(net::DISK_CACHE),
	memory_only_(false),
	simple_cache_mode_(false),
	simple_cache_wait_for_index_(true),
	force_creation_(false),
	new_eviction_(false),
	first_cleanup_(true),
	integrity_(true),
	use_current_thread_(false) {}

	DiskCacheTestWithCache::~DiskCacheTestWithCache() = default;

	void DiskCacheTestWithCache::InitCache() {
	if (memory_only_)
	InitMemoryCache();
	else
	InitDiskCache();

	ASSERT_TRUE(NULL != cache_);
	if (first_cleanup_)
	ASSERT_EQ(0, cache_->GetEntryCount());
	}

	// We are expected to leak memory when simulating crashes.
	void DiskCacheTestWithCache::SimulateCrash() {
	ASSERT_TRUE(!memory_only_);
	net::TestCompletionCallback cb;
	int rv = cache_impl_->FlushQueueForTest(cb.callback());
	ASSERT_THAT(cb.GetResult(rv), IsOk());
	cache_impl_->ClearRefCountForTest();

	cache_.reset();
	EXPECT_TRUE(CheckCacheIntegrity(cache_path_, new_eviction_, size_, mask_));

	CreateBackend(disk_cache::kNoRandom);
	}

	void DiskCacheTestWithCache::SetTestMode() {
	ASSERT_TRUE(!memory_only_);
	cache_impl_->SetUnitTestMode();
	}

	void DiskCacheTestWithCache::SetMaxSize(int64_t size, bool should_succeed) {
	size_ = size;
	if (simple_cache_impl_)
	EXPECT_EQ(should_succeed, simple_cache_impl_->SetMaxSize(size));

	if (cache_impl_)
	EXPECT_EQ(should_succeed, cache_impl_->SetMaxSize(size));

	if (mem_cache_)
	EXPECT_EQ(should_succeed, mem_cache_->SetMaxSize(size));
	}

	int DiskCacheTestWithCache::OpenEntry(const std::string& key,
	disk_cache::Entry** entry) {
	return OpenEntryWithPriority(key, net::HIGHEST, entry);
	}

	int DiskCacheTestWithCache::OpenEntryWithPriority(
	const std::string& key,
	net::RequestPriority request_priority,
	disk_cache::Entry** entry) {
	net::TestCompletionCallback cb;
	int rv = cache_->OpenEntry(key, request_priority, entry, cb.callback());
	return cb.GetResult(rv);
	}

	int DiskCacheTestWithCache::CreateEntry(const std::string& key,
	disk_cache::Entry** entry) {
	return CreateEntryWithPriority(key, net::HIGHEST, entry);
	}

	int DiskCacheTestWithCache::CreateEntryWithPriority(
	const std::string& key,
	net::RequestPriority request_priority,
	disk_cache::Entry** entry) {
	net::TestCompletionCallback cb;
	int rv = cache_->CreateEntry(key, request_priority, entry, cb.callback());
	return cb.GetResult(rv);
	}

	int DiskCacheTestWithCache::DoomEntry(const std::string& key) {
	net::TestCompletionCallback cb;
	int rv = cache_->DoomEntry(key, net::HIGHEST, cb.callback());
	return cb.GetResult(rv);
	}

	int DiskCacheTestWithCache::DoomAllEntries() {
	net::TestCompletionCallback cb;
	int rv = cache_->DoomAllEntries(cb.callback());
	return cb.GetResult(rv);
	}

	int DiskCacheTestWithCache::DoomEntriesBetween(const base::Time initial_time,
	const base::Time end_time) {
	net::TestCompletionCallback cb;
	int rv = cache_->DoomEntriesBetween(initial_time, end_time, cb.callback());
	return cb.GetResult(rv);
	}

	int DiskCacheTestWithCache::DoomEntriesSince(const base::Time initial_time) {
	net::TestCompletionCallback cb;
	int rv = cache_->DoomEntriesSince(initial_time, cb.callback());
	return cb.GetResult(rv);
	}

	int64_t DiskCacheTestWithCache::CalculateSizeOfAllEntries() {
	net::TestInt64CompletionCallback cb;
	int64_t rv = cache_->CalculateSizeOfAllEntries(cb.callback());
	return cb.GetResult(rv);
	}

	int64_t DiskCacheTestWithCache::CalculateSizeOfEntriesBetween(
	const base::Time initial_time,
	const base::Time end_time) {
	net::TestInt64CompletionCallback cb;
	int64_t rv = cache_->CalculateSizeOfEntriesBetween(initial_time, end_time,
	cb.callback());
	return cb.GetResult(rv);
	}

	std::unique_ptr<DiskCacheTestWithCache::TestIterator>
	DiskCacheTestWithCache::CreateIterator() {
	return std::unique_ptr<TestIterator>(
	new TestIterator(cache_->CreateIterator()));
	}

	void DiskCacheTestWithCache::FlushQueueForTest() {
	if (memory_only_ \|\| !cache_impl_)
	return;

	net::TestCompletionCallback cb;
	int rv = cache_impl_->FlushQueueForTest(cb.callback());
	EXPECT_THAT(cb.GetResult(rv), IsOk());
	}

	void DiskCacheTestWithCache::RunTaskForTest(const base::Closure& closure) {
	if (memory_only_ \|\| !cache_impl_) {
	closure.Run();
	return;
	}

	net::TestCompletionCallback cb;
	int rv = cache_impl_->RunTaskForTest(closure, cb.callback());
	EXPECT_THAT(cb.GetResult(rv), IsOk());
	}

	int DiskCacheTestWithCache::ReadData(disk_cache::Entry* entry, int index,
	int offset, net::IOBuffer* buf, int len) {
	net::TestCompletionCallback cb;
	int rv = entry->ReadData(index, offset, buf, len, cb.callback());
	return cb.GetResult(rv);
	}

	int DiskCacheTestWithCache::WriteData(disk_cache::Entry* entry, int index,
	int offset, net::IOBuffer* buf, int len,
	bool truncate) {
	net::TestCompletionCallback cb;
	int rv = entry->WriteData(index, offset, buf, len, cb.callback(), truncate);
	return cb.GetResult(rv);
	}

	int DiskCacheTestWithCache::ReadSparseData(disk_cache::Entry* entry,
	int64_t offset,
	net::IOBuffer* buf,
	int len) {
	net::TestCompletionCallback cb;
	int rv = entry->ReadSparseData(offset, buf, len, cb.callback());
	return cb.GetResult(rv);
	}

	int DiskCacheTestWithCache::WriteSparseData(disk_cache::Entry* entry,
	int64_t offset,
	net::IOBuffer* buf,
	int len) {
	net::TestCompletionCallback cb;
	int rv = entry->WriteSparseData(offset, buf, len, cb.callback());
	return cb.GetResult(rv);
	}

	void DiskCacheTestWithCache::TrimForTest(bool empty) {
	RunTaskForTest(base::Bind(&disk_cache::BackendImpl::TrimForTest,
	base::Unretained(cache_impl_),
	empty));
	}

	void DiskCacheTestWithCache::TrimDeletedListForTest(bool empty) {
	RunTaskForTest(base::Bind(&disk_cache::BackendImpl::TrimDeletedListForTest,
	base::Unretained(cache_impl_),
	empty));
	}

	void DiskCacheTestWithCache::AddDelay() {
	if (simple_cache_mode_) {
	// The simple cache uses second resolution for many timeouts, so it's safest
	// to advance by at least whole seconds before falling back into the normal
	// disk cache epsilon advance.
	const base::Time initial_time = base::Time::Now();
	do {
	base::PlatformThread::YieldCurrentThread();
	} while (base::Time::Now() -
	initial_time < base::TimeDelta::FromSeconds(1));
	}

	base::Time initial = base::Time::Now();
	while (base::Time::Now() <= initial) {
	base::PlatformThread::Sleep(base::TimeDelta::FromMilliseconds(1));
	};
	}

	void DiskCacheTestWithCache::TearDown() {
	RunUntilIdle();
	cache_.reset();

	if (!memory_only_ && !simple_cache_mode_ && integrity_) {
	EXPECT_TRUE(CheckCacheIntegrity(cache_path_, new_eviction_, size_, mask_));
	}
	RunUntilIdle();
	if (simple_cache_mode_ && simple_file_tracker_)
	EXPECT_TRUE(simple_file_tracker_->IsEmptyForTesting());

	DiskCacheTest::TearDown();
	}

	void DiskCacheTestWithCache::InitMemoryCache() {
	mem_cache_ = new disk_cache::MemBackendImpl(NULL);
	cache_.reset(mem_cache_);
	ASSERT_TRUE(cache_);

	if (size_)
	EXPECT_TRUE(mem_cache_->SetMaxSize(size_));

	ASSERT_TRUE(mem_cache_->Init());
	}

	void DiskCacheTestWithCache::InitDiskCache() {
	if (first_cleanup_)
	ASSERT_TRUE(CleanupCacheDir());

	CreateBackend(disk_cache::kNoRandom);
	}

	void DiskCacheTestWithCache::CreateBackend(uint32_t flags) {
	scoped_refptr<base::SingleThreadTaskRunner> runner;
	if (use_current_thread_)
	runner = base::ThreadTaskRunnerHandle::Get();
	else
	runner = nullptr; // let the backend sort it out.

	if (simple_cache_mode_) {
	DCHECK(!use_current_thread_)
	<< "Using current thread unsupported by SimpleCache";
	net::TestCompletionCallback cb;
	// We limit ourselves to 64 fds since OS X by default gives us 256.
	// (Chrome raises the number on startup, but the test fixture doesn't).
	if (!simple_file_tracker_)
	simple_file_tracker_ =
	std::make_unique<disk_cache::SimpleFileTracker>(64);
	std::unique_ptr<disk_cache::SimpleBackendImpl> simple_backend =
	std::make_unique<disk_cache::SimpleBackendImpl>(
	cache_path_, /* cleanup_tracker = */ nullptr,
	simple_file_tracker_.get(), size_, type_, /net_log = / nullptr);
	int rv = simple_backend->Init(cb.callback());
	ASSERT_THAT(cb.GetResult(rv), IsOk());
	simple_cache_impl_ = simple_backend.get();
	cache_ = std::move(simple_backend);
	if (simple_cache_wait_for_index_) {
	net::TestCompletionCallback wait_for_index_cb;
	rv = simple_cache_impl_->index()->ExecuteWhenReady(
	wait_for_index_cb.callback());
	ASSERT_THAT(wait_for_index_cb.GetResult(rv), IsOk());
	}
	return;
	}

	if (mask_)
	cache_impl_ = new disk_cache::BackendImpl(cache_path_, mask_, runner,
	/* net_log = */ nullptr);
	else
	cache_impl_ = new disk_cache::BackendImpl(cache_path_,
	/* cleanup_tracker = */ nullptr,
	runner, /* net_log = */ nullptr);
	cache_.reset(cache_impl_);
	ASSERT_TRUE(cache_);
	if (size_)
	EXPECT_TRUE(cache_impl_->SetMaxSize(size_));
	if (new_eviction_)
	cache_impl_->SetNewEviction();
	cache_impl_->SetType(type_);
	cache_impl_->SetFlags(flags);
	net::TestCompletionCallback cb;
	int rv = cache_impl_->Init(cb.callback());
	ASSERT_THAT(cb.GetResult(rv), IsOk());
	}