xref: /external/chromium_org/webkit/browser/appcache/appcache_storage_impl_unittest.cc

// 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 <stack>

#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/callback.h"
#include "base/file_util.h"
#include "base/files/scoped_temp_dir.h"
#include "base/memory/scoped_ptr.h"
#include "base/message_loop/message_loop.h"
#include "base/synchronization/waitable_event.h"
#include "base/threading/thread.h"
#include "net/base/net_errors.h"
#include "net/base/request_priority.h"
#include "net/http/http_response_headers.h"
#include "net/url_request/url_request_error_job.h"
#include "net/url_request/url_request_job_factory_impl.h"
#include "net/url_request/url_request_test_job.h"
#include "net/url_request/url_request_test_util.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "webkit/browser/appcache/appcache.h"
#include "webkit/browser/appcache/appcache_backend_impl.h"
#include "webkit/browser/appcache/appcache_database.h"
#include "webkit/browser/appcache/appcache_entry.h"
#include "webkit/browser/appcache/appcache_group.h"
#include "webkit/browser/appcache/appcache_host.h"
#include "webkit/browser/appcache/appcache_interceptor.h"
#include "webkit/browser/appcache/appcache_request_handler.h"
#include "webkit/browser/appcache/appcache_service.h"
#include "webkit/browser/appcache/appcache_storage_impl.h"
#include "webkit/browser/quota/quota_manager.h"

namespace appcache {

namespace {

const base::Time kZeroTime;
const GURL kManifestUrl("http://blah/manifest");
const GURL kManifestUrl2("http://blah/manifest2");
const GURL kManifestUrl3("http://blah/manifest3");
const GURL kEntryUrl("http://blah/entry");
const GURL kEntryUrl2("http://blah/entry2");
const GURL kFallbackNamespace("http://blah/fallback_namespace/");
const GURL kFallbackNamespace2("http://blah/fallback_namespace/longer");
const GURL kFallbackTestUrl("http://blah/fallback_namespace/longer/test");
const GURL kOnlineNamespace("http://blah/online_namespace");
const GURL kOnlineNamespaceWithinFallback(
    "http://blah/fallback_namespace/online/");
const GURL kInterceptNamespace("http://blah/intercept_namespace/");
const GURL kInterceptNamespace2("http://blah/intercept_namespace/longer/");
const GURL kInterceptTestUrl("http://blah/intercept_namespace/longer/test");
const GURL kInterceptPatternNamespace("http://blah/intercept_pattern/*/bar");
const GURL kInterceptPatternTestPositiveUrl(
    "http://blah/intercept_pattern/foo/bar");
const GURL kInterceptPatternTestNegativeUrl(
    "http://blah/intercept_pattern/foo/not_bar");
const GURL kFallbackPatternNamespace("http://blah/fallback_pattern/*/bar");
const GURL kFallbackPatternTestPositiveUrl(
    "http://blah/fallback_pattern/foo/bar");
const GURL kFallbackPatternTestNegativeUrl(
    "http://blah/fallback_pattern/foo/not_bar");
const GURL kOrigin(kManifestUrl.GetOrigin());

const int kManifestEntryIdOffset = 100;
const int kFallbackEntryIdOffset = 1000;

const GURL kDefaultEntryUrl("http://blah/makecacheandgroup_default_entry");
const int kDefaultEntrySize = 10;
const int kDefaultEntryIdOffset = 12345;

const int kMockQuota = 5000;

// The Reinitialize test needs some http accessible resources to run,
// we mock stuff inprocess for that.
class MockHttpServer {
 public:
  static GURL GetMockUrl(const std::string& path) {
    return GURL("http://mockhost/" + path);
  }

  static net::URLRequestJob* CreateJob(
      net::URLRequest* request, net::NetworkDelegate* network_delegate) {
    if (request->url().host() != "mockhost")
      return new net::URLRequestErrorJob(request, network_delegate, -100);

    std::string headers, body;
    GetMockResponse(request->url().path(), &headers, &body);
    return new net::URLRequestTestJob(
        request, network_delegate, headers, body, true);
  }

 private:
  static void GetMockResponse(const std::string& path,
                              std::string* headers,
                              std::string* body) {
    const char manifest_headers[] =
        "HTTP/1.1 200 OK\0"
        "Content-type: text/cache-manifest\0"
        "\0";
    const char page_headers[] =
        "HTTP/1.1 200 OK\0"
        "Content-type: text/html\0"
        "\0";
    const char not_found_headers[] =
        "HTTP/1.1 404 NOT FOUND\0"
        "\0";

    if (path == "/manifest") {
      (*headers) = std::string(manifest_headers, arraysize(manifest_headers));
      (*body) = "CACHE MANIFEST\n";
    } else if (path == "/empty.html") {
      (*headers) = std::string(page_headers, arraysize(page_headers));
      (*body) = "";
    } else {
      (*headers) = std::string(not_found_headers,
                               arraysize(not_found_headers));
      (*body) = "";
    }
  }
};

class MockHttpServerJobFactory
    : public net::URLRequestJobFactory::ProtocolHandler {
 public:
  virtual net::URLRequestJob* MaybeCreateJob(
      net::URLRequest* request,
      net::NetworkDelegate* network_delegate) const OVERRIDE {
    return MockHttpServer::CreateJob(request, network_delegate);
  }
};

class IOThread : public base::Thread {
 public:
  explicit IOThread(const char* name)
      : base::Thread(name) {
  }

  virtual ~IOThread() {
    Stop();
  }

  net::URLRequestContext* request_context() {
    return request_context_.get();
  }

  virtual void Init() OVERRIDE {
    scoped_ptr<net::URLRequestJobFactoryImpl> factory(
        new net::URLRequestJobFactoryImpl());
    factory->SetProtocolHandler("http", new MockHttpServerJobFactory);
    job_factory_ = factory.Pass();
    request_context_.reset(new net::TestURLRequestContext());
    request_context_->set_job_factory(job_factory_.get());
    AppCacheInterceptor::EnsureRegistered();
  }

  virtual void CleanUp() OVERRIDE {
    request_context_.reset();
    job_factory_.reset();
  }

 private:
  scoped_ptr<net::URLRequestJobFactory> job_factory_;
  scoped_ptr<net::URLRequestContext> request_context_;
};

scoped_ptr<IOThread> io_thread;
scoped_ptr<base::Thread> db_thread;

}  // namespace

class AppCacheStorageImplTest : public testing::Test {
 public:
  class MockStorageDelegate : public AppCacheStorage::Delegate {
   public:
    explicit MockStorageDelegate(AppCacheStorageImplTest* test)
        : loaded_cache_id_(0), stored_group_success_(false),
          would_exceed_quota_(false), obsoleted_success_(false),
          found_cache_id_(kNoCacheId), test_(test) {
    }

    virtual void OnCacheLoaded(AppCache* cache, int64 cache_id) OVERRIDE {
      loaded_cache_ = cache;
      loaded_cache_id_ = cache_id;
      test_->ScheduleNextTask();
    }

    virtual void OnGroupLoaded(AppCacheGroup* group,
                               const GURL& manifest_url) OVERRIDE {
      loaded_group_ = group;
      loaded_manifest_url_ = manifest_url;
      loaded_groups_newest_cache_ = group ? group->newest_complete_cache()
                                          : NULL;
      test_->ScheduleNextTask();
    }

    virtual void OnGroupAndNewestCacheStored(
        AppCacheGroup* group, AppCache* newest_cache, bool success,
        bool would_exceed_quota) OVERRIDE {
      stored_group_ = group;
      stored_group_success_ = success;
      would_exceed_quota_ = would_exceed_quota;
      test_->ScheduleNextTask();
    }

    virtual void OnGroupMadeObsolete(AppCacheGroup* group,
                                     bool success) OVERRIDE {
      obsoleted_group_ = group;
      obsoleted_success_ = success;
      test_->ScheduleNextTask();
    }

    virtual void OnMainResponseFound(const GURL& url,
                                     const AppCacheEntry& entry,
                                     const GURL& namespace_entry_url,
                                     const AppCacheEntry& fallback_entry,
                                     int64 cache_id,
                                     int64 group_id,
                                     const GURL& manifest_url) OVERRIDE {
      found_url_ = url;
      found_entry_ = entry;
      found_namespace_entry_url_ = namespace_entry_url;
      found_fallback_entry_ = fallback_entry;
      found_cache_id_ = cache_id;
      found_group_id_ = group_id;
      found_manifest_url_ = manifest_url;
      test_->ScheduleNextTask();
    }

    scoped_refptr<AppCache> loaded_cache_;
    int64 loaded_cache_id_;
    scoped_refptr<AppCacheGroup> loaded_group_;
    GURL loaded_manifest_url_;
    scoped_refptr<AppCache> loaded_groups_newest_cache_;
    scoped_refptr<AppCacheGroup> stored_group_;
    bool stored_group_success_;
    bool would_exceed_quota_;
    scoped_refptr<AppCacheGroup> obsoleted_group_;
    bool obsoleted_success_;
    GURL found_url_;
    AppCacheEntry found_entry_;
    GURL found_namespace_entry_url_;
    AppCacheEntry found_fallback_entry_;
    int64 found_cache_id_;
    int64 found_group_id_;
    GURL found_manifest_url_;
    AppCacheStorageImplTest* test_;
  };

  class MockQuotaManager : public quota::QuotaManager {
   public:
    MockQuotaManager()
        : QuotaManager(true /* is_incognito */,
                       base::FilePath(),
                       io_thread->message_loop_proxy().get(),
                       db_thread->message_loop_proxy().get(),
                       NULL),
          async_(false) {}

    virtual void GetUsageAndQuota(
        const GURL& origin,
        quota::StorageType type,
        const GetUsageAndQuotaCallback& callback) OVERRIDE {
      EXPECT_EQ(kOrigin, origin);
      EXPECT_EQ(quota::kStorageTypeTemporary, type);
      if (async_) {
        base::MessageLoop::current()->PostTask(
            FROM_HERE,
            base::Bind(&MockQuotaManager::CallCallback,
                       base::Unretained(this),
                       callback));
        return;
      }
      CallCallback(callback);
    }

    void CallCallback(const GetUsageAndQuotaCallback& callback) {
      callback.Run(quota::kQuotaStatusOk, 0, kMockQuota);
    }

    bool async_;

   protected:
    virtual ~MockQuotaManager() {}
  };

  class MockQuotaManagerProxy : public quota::QuotaManagerProxy {
   public:
    MockQuotaManagerProxy()
        : QuotaManagerProxy(NULL, NULL),
          notify_storage_accessed_count_(0),
          notify_storage_modified_count_(0),
          last_delta_(0),
          mock_manager_(new MockQuotaManager) {
      manager_ = mock_manager_.get();
    }

    virtual void NotifyStorageAccessed(quota::QuotaClient::ID client_id,
                                       const GURL& origin,
                                       quota::StorageType type) OVERRIDE {
      EXPECT_EQ(quota::QuotaClient::kAppcache, client_id);
      EXPECT_EQ(quota::kStorageTypeTemporary, type);
      ++notify_storage_accessed_count_;
      last_origin_ = origin;
    }

    virtual void NotifyStorageModified(quota::QuotaClient::ID client_id,
                                       const GURL& origin,
                                       quota::StorageType type,
                                       int64 delta) OVERRIDE {
      EXPECT_EQ(quota::QuotaClient::kAppcache, client_id);
      EXPECT_EQ(quota::kStorageTypeTemporary, type);
      ++notify_storage_modified_count_;
      last_origin_ = origin;
      last_delta_ = delta;
    }

    // Not needed for our tests.
    virtual void RegisterClient(quota::QuotaClient* client) OVERRIDE {}
    virtual void NotifyOriginInUse(const GURL& origin) OVERRIDE {}
    virtual void NotifyOriginNoLongerInUse(const GURL& origin) OVERRIDE {}
    virtual void SetUsageCacheEnabled(quota::QuotaClient::ID client_id,
                                      const GURL& origin,
                                      quota::StorageType type,
                                      bool enabled) OVERRIDE {}
    virtual void GetUsageAndQuota(
        base::SequencedTaskRunner* original_task_runner,
        const GURL& origin,
        quota::StorageType type,
        const GetUsageAndQuotaCallback& callback) OVERRIDE {}

    int notify_storage_accessed_count_;
    int notify_storage_modified_count_;
    GURL last_origin_;
    int last_delta_;
    scoped_refptr<MockQuotaManager> mock_manager_;

   protected:
    virtual ~MockQuotaManagerProxy() {}
  };

  template <class Method>
  void RunMethod(Method method) {
    (this->*method)();
  }

  // Helper callback to run a test on our io_thread. The io_thread is spun up
  // once and reused for all tests.
  template <class Method>
  void MethodWrapper(Method method) {
    SetUpTest();

    // Ensure InitTask execution prior to conducting a test.
    FlushDbThreadTasks();

    // We also have to wait for InitTask completion call to be performed
    // on the IO thread prior to running the test. Its guaranteed to be
    // queued by this time.
    base::MessageLoop::current()->PostTask(
        FROM_HERE,
        base::Bind(&AppCacheStorageImplTest::RunMethod<Method>,
                   base::Unretained(this),
                   method));
  }

  static void SetUpTestCase() {
    // We start both threads as TYPE_IO because we also use the db_thead
    // for the disk_cache which needs to be of TYPE_IO.
    base::Thread::Options options(base::MessageLoop::TYPE_IO, 0);
    io_thread.reset(new IOThread("AppCacheTest.IOThread"));
    ASSERT_TRUE(io_thread->StartWithOptions(options));
    db_thread.reset(new base::Thread("AppCacheTest::DBThread"));
    ASSERT_TRUE(db_thread->StartWithOptions(options));
  }

  static void TearDownTestCase() {
    io_thread.reset(NULL);
    db_thread.reset(NULL);
  }

  // Test harness --------------------------------------------------

  AppCacheStorageImplTest() {
  }

  template <class Method>
  void RunTestOnIOThread(Method method) {
    test_finished_event_ .reset(new base::WaitableEvent(false, false));
    io_thread->message_loop()->PostTask(
        FROM_HERE, base::Bind(&AppCacheStorageImplTest::MethodWrapper<Method>,
                              base::Unretained(this), method));
    test_finished_event_->Wait();
  }

  void SetUpTest() {
    DCHECK(base::MessageLoop::current() == io_thread->message_loop());
    service_.reset(new AppCacheService(NULL));
    service_->Initialize(
        base::FilePath(), db_thread->message_loop_proxy().get(), NULL);
    mock_quota_manager_proxy_ = new MockQuotaManagerProxy();
    service_->quota_manager_proxy_ = mock_quota_manager_proxy_;
    delegate_.reset(new MockStorageDelegate(this));
  }

  void TearDownTest() {
    DCHECK(base::MessageLoop::current() == io_thread->message_loop());
    storage()->CancelDelegateCallbacks(delegate());
    group_ = NULL;
    cache_ = NULL;
    cache2_ = NULL;
    mock_quota_manager_proxy_ = NULL;
    delegate_.reset();
    service_.reset();
    FlushDbThreadTasks();
  }

  void TestFinished() {
    // We unwind the stack prior to finishing up to let stack
    // based objects get deleted.
    DCHECK(base::MessageLoop::current() == io_thread->message_loop());
    base::MessageLoop::current()->PostTask(
        FROM_HERE,
        base::Bind(&AppCacheStorageImplTest::TestFinishedUnwound,
                   base::Unretained(this)));
  }

  void TestFinishedUnwound() {
    TearDownTest();
    test_finished_event_->Signal();
  }

  void PushNextTask(const base::Closure& task) {
    task_stack_.push(task);
  }

  void ScheduleNextTask() {
    DCHECK(base::MessageLoop::current() == io_thread->message_loop());
    if (task_stack_.empty()) {
      return;
    }
    base::MessageLoop::current()->PostTask(FROM_HERE, task_stack_.top());
    task_stack_.pop();
  }

  static void SignalEvent(base::WaitableEvent* event) {
    event->Signal();
  }

  void FlushDbThreadTasks() {
    // We pump a task thru the db thread to ensure any tasks previously
    // scheduled on that thread have been performed prior to return.
    base::WaitableEvent event(false, false);
    db_thread->message_loop()->PostTask(
        FROM_HERE, base::Bind(&AppCacheStorageImplTest::SignalEvent, &event));
    event.Wait();
  }

  // LoadCache_Miss ----------------------------------------------------

  void LoadCache_Miss() {
    // Attempt to load a cache that doesn't exist. Should
    // complete asynchronously.
    PushNextTask(base::Bind(&AppCacheStorageImplTest::Verify_LoadCache_Miss,
                            base::Unretained(this)));

    storage()->LoadCache(111, delegate());
    EXPECT_NE(111, delegate()->loaded_cache_id_);
  }

  void Verify_LoadCache_Miss() {
    EXPECT_EQ(111, delegate()->loaded_cache_id_);
    EXPECT_FALSE(delegate()->loaded_cache_.get());
    EXPECT_EQ(0, mock_quota_manager_proxy_->notify_storage_accessed_count_);
    EXPECT_EQ(0, mock_quota_manager_proxy_->notify_storage_modified_count_);
    TestFinished();
  }

  // LoadCache_NearHit -------------------------------------------------

  void LoadCache_NearHit() {
    // Attempt to load a cache that is currently in use
    // and does not require loading from storage. This
    // load should complete syncly.

    // Setup some preconditions. Make an 'unstored' cache for
    // us to load. The ctor should put it in the working set.
    int64 cache_id = storage()->NewCacheId();
    scoped_refptr<AppCache> cache(new AppCache(storage(), cache_id));

    // Conduct the test.
    storage()->LoadCache(cache_id, delegate());
    EXPECT_EQ(cache_id, delegate()->loaded_cache_id_);
    EXPECT_EQ(cache.get(), delegate()->loaded_cache_.get());
    EXPECT_EQ(0, mock_quota_manager_proxy_->notify_storage_accessed_count_);
    EXPECT_EQ(0, mock_quota_manager_proxy_->notify_storage_modified_count_);
    TestFinished();
  }

  // CreateGroup  --------------------------------------------

  void CreateGroupInEmptyOrigin() {
    // Attempt to load a group that doesn't exist, one should
    // be created for us, but not stored.

    // Since the origin has no groups, the storage class will respond
    // syncly.
    storage()->LoadOrCreateGroup(kManifestUrl, delegate());
    Verify_CreateGroup();
  }

  void CreateGroupInPopulatedOrigin() {
    // Attempt to load a group that doesn't exist, one should
    // be created for us, but not stored.
    PushNextTask(base::Bind(&AppCacheStorageImplTest::Verify_CreateGroup,
                            base::Unretained(this)));

    // Since the origin has groups, storage class will have to
    // consult the database and completion will be async.
    storage()->usage_map_[kOrigin] = kDefaultEntrySize;

    storage()->LoadOrCreateGroup(kManifestUrl, delegate());
    EXPECT_FALSE(delegate()->loaded_group_.get());
  }

  void Verify_CreateGroup() {
    EXPECT_EQ(kManifestUrl, delegate()->loaded_manifest_url_);
    EXPECT_TRUE(delegate()->loaded_group_.get());
    EXPECT_TRUE(delegate()->loaded_group_->HasOneRef());
    EXPECT_FALSE(delegate()->loaded_group_->newest_complete_cache());

    // Should not have been stored in the database.
    AppCacheDatabase::GroupRecord record;
    EXPECT_FALSE(database()->FindGroup(
        delegate()->loaded_group_->group_id(), &record));

    EXPECT_EQ(0, mock_quota_manager_proxy_->notify_storage_accessed_count_);
    EXPECT_EQ(0, mock_quota_manager_proxy_->notify_storage_modified_count_);

    TestFinished();
  }

  // LoadGroupAndCache_FarHit  --------------------------------------

  void LoadGroupAndCache_FarHit() {
    // Attempt to load a cache that is not currently in use
    // and does require loading from disk. This
    // load should complete asynchronously.
    PushNextTask(base::Bind(&AppCacheStorageImplTest::Verify_LoadCache_Far_Hit,
                            base::Unretained(this)));

    // Setup some preconditions. Create a group and newest cache that
    // appear to be "stored" and "not currently in use".
    MakeCacheAndGroup(kManifestUrl, 1, 1, true);
    group_ = NULL;
    cache_ = NULL;

    // Conduct the cache load test, completes async
    storage()->LoadCache(1, delegate());
  }

  void Verify_LoadCache_Far_Hit() {
    EXPECT_TRUE(delegate()->loaded_cache_.get());
    EXPECT_TRUE(delegate()->loaded_cache_->HasOneRef());
    EXPECT_EQ(1, delegate()->loaded_cache_id_);

    // The group should also have been loaded.
    EXPECT_TRUE(delegate()->loaded_cache_->owning_group());
    EXPECT_TRUE(delegate()->loaded_cache_->owning_group()->HasOneRef());
    EXPECT_EQ(1, delegate()->loaded_cache_->owning_group()->group_id());

    EXPECT_EQ(1, mock_quota_manager_proxy_->notify_storage_accessed_count_);
    EXPECT_EQ(0, mock_quota_manager_proxy_->notify_storage_modified_count_);

    // Drop things from the working set.
    delegate()->loaded_cache_ = NULL;
    EXPECT_FALSE(delegate()->loaded_group_.get());

    // Conduct the group load test, also complete asynchronously.
    PushNextTask(base::Bind(&AppCacheStorageImplTest::Verify_LoadGroup_Far_Hit,
                            base::Unretained(this)));

    storage()->LoadOrCreateGroup(kManifestUrl, delegate());
  }

  void Verify_LoadGroup_Far_Hit() {
    EXPECT_TRUE(delegate()->loaded_group_.get());
    EXPECT_EQ(kManifestUrl, delegate()->loaded_manifest_url_);
    EXPECT_TRUE(delegate()->loaded_group_->newest_complete_cache());
    delegate()->loaded_groups_newest_cache_ = NULL;
    EXPECT_TRUE(delegate()->loaded_group_->HasOneRef());
    EXPECT_EQ(2, mock_quota_manager_proxy_->notify_storage_accessed_count_);
    EXPECT_EQ(0, mock_quota_manager_proxy_->notify_storage_modified_count_);
    TestFinished();
  }

  // StoreNewGroup  --------------------------------------

  void StoreNewGroup() {
    // Store a group and its newest cache. Should complete asynchronously.
    PushNextTask(base::Bind(&AppCacheStorageImplTest::Verify_StoreNewGroup,
                            base::Unretained(this)));

    // Setup some preconditions. Create a group and newest cache that
    // appear to be "unstored".
    group_ = new AppCacheGroup(
        storage(), kManifestUrl, storage()->NewGroupId());
    cache_ = new AppCache(storage(), storage()->NewCacheId());
    cache_->AddEntry(kEntryUrl, AppCacheEntry(AppCacheEntry::EXPLICIT, 1,
                                              kDefaultEntrySize));
    // Hold a ref to the cache simulate the UpdateJob holding that ref,
    // and hold a ref to the group to simulate the CacheHost holding that ref.

    // Have the quota manager retrun asynchronously for this test.
    mock_quota_manager_proxy_->mock_manager_->async_ = true;

    // Conduct the store test.
    storage()->StoreGroupAndNewestCache(group_.get(), cache_.get(), delegate());
    EXPECT_FALSE(delegate()->stored_group_success_);
  }

  void Verify_StoreNewGroup() {
    EXPECT_TRUE(delegate()->stored_group_success_);
    EXPECT_EQ(group_.get(), delegate()->stored_group_.get());
    EXPECT_EQ(cache_.get(), group_->newest_complete_cache());
    EXPECT_TRUE(cache_->is_complete());

    // Should have been stored in the database.
    AppCacheDatabase::GroupRecord group_record;
    AppCacheDatabase::CacheRecord cache_record;
    EXPECT_TRUE(database()->FindGroup(group_->group_id(), &group_record));
    EXPECT_TRUE(database()->FindCache(cache_->cache_id(), &cache_record));

    // Verify quota bookkeeping
    EXPECT_EQ(kDefaultEntrySize, storage()->usage_map_[kOrigin]);
    EXPECT_EQ(1, mock_quota_manager_proxy_->notify_storage_modified_count_);
    EXPECT_EQ(kOrigin, mock_quota_manager_proxy_->last_origin_);
    EXPECT_EQ(kDefaultEntrySize, mock_quota_manager_proxy_->last_delta_);

    TestFinished();
  }

  // StoreExistingGroup  --------------------------------------

  void StoreExistingGroup() {
    // Store a group and its newest cache. Should complete asynchronously.
    PushNextTask(base::Bind(&AppCacheStorageImplTest::Verify_StoreExistingGroup,
                            base::Unretained(this)));

    // Setup some preconditions. Create a group and old complete cache
    // that appear to be "stored"
    MakeCacheAndGroup(kManifestUrl, 1, 1, true);
    EXPECT_EQ(kDefaultEntrySize, storage()->usage_map_[kOrigin]);

    // And a newest unstored complete cache.
    cache2_ = new AppCache(storage(), 2);
    cache2_->AddEntry(kEntryUrl, AppCacheEntry(AppCacheEntry::MASTER, 1,
                                               kDefaultEntrySize + 100));

    // Conduct the test.
    storage()->StoreGroupAndNewestCache(
        group_.get(), cache2_.get(), delegate());
    EXPECT_FALSE(delegate()->stored_group_success_);
  }

  void Verify_StoreExistingGroup() {
    EXPECT_TRUE(delegate()->stored_group_success_);
    EXPECT_EQ(group_.get(), delegate()->stored_group_.get());
    EXPECT_EQ(cache2_.get(), group_->newest_complete_cache());
    EXPECT_TRUE(cache2_->is_complete());

    // The new cache should have been stored in the database.
    AppCacheDatabase::GroupRecord group_record;
    AppCacheDatabase::CacheRecord cache_record;
    EXPECT_TRUE(database()->FindGroup(1, &group_record));
    EXPECT_TRUE(database()->FindCache(2, &cache_record));

    // The old cache should have been deleted
    EXPECT_FALSE(database()->FindCache(1, &cache_record));

    // Verify quota bookkeeping
    EXPECT_EQ(kDefaultEntrySize + 100, storage()->usage_map_[kOrigin]);
    EXPECT_EQ(1, mock_quota_manager_proxy_->notify_storage_modified_count_);
    EXPECT_EQ(kOrigin, mock_quota_manager_proxy_->last_origin_);
    EXPECT_EQ(100, mock_quota_manager_proxy_->last_delta_);

    TestFinished();
  }

  // StoreExistingGroupExistingCache  -------------------------------

  void StoreExistingGroupExistingCache() {
    // Store a group with updates to its existing newest complete cache.
    // Setup some preconditions. Create a group and a complete cache that
    // appear to be "stored".

    // Setup some preconditions. Create a group and old complete cache
    // that appear to be "stored"
    MakeCacheAndGroup(kManifestUrl, 1, 1, true);
    EXPECT_EQ(kDefaultEntrySize, storage()->usage_map_[kOrigin]);

    // Change the cache.
    base::Time now = base::Time::Now();
    cache_->AddEntry(kEntryUrl, AppCacheEntry(AppCacheEntry::MASTER, 1, 100));
    cache_->set_update_time(now);

    PushNextTask(base::Bind(
        &AppCacheStorageImplTest::Verify_StoreExistingGroupExistingCache,
        base::Unretained(this), now));

    // Conduct the test.
    EXPECT_EQ(cache_, group_->newest_complete_cache());
    storage()->StoreGroupAndNewestCache(group_.get(), cache_.get(), delegate());
    EXPECT_FALSE(delegate()->stored_group_success_);
  }

  void Verify_StoreExistingGroupExistingCache(
      base::Time expected_update_time) {
    EXPECT_TRUE(delegate()->stored_group_success_);
    EXPECT_EQ(cache_, group_->newest_complete_cache());

    AppCacheDatabase::CacheRecord cache_record;
    EXPECT_TRUE(database()->FindCache(1, &cache_record));
    EXPECT_EQ(1, cache_record.cache_id);
    EXPECT_EQ(1, cache_record.group_id);
    EXPECT_FALSE(cache_record.online_wildcard);
    EXPECT_TRUE(expected_update_time == cache_record.update_time);
    EXPECT_EQ(100 + kDefaultEntrySize, cache_record.cache_size);

    std::vector<AppCacheDatabase::EntryRecord> entry_records;
    EXPECT_TRUE(database()->FindEntriesForCache(1, &entry_records));
    EXPECT_EQ(2U, entry_records.size());
    if (entry_records[0].url == kDefaultEntryUrl)
      entry_records.erase(entry_records.begin());
    EXPECT_EQ(1 , entry_records[0].cache_id);
    EXPECT_EQ(kEntryUrl, entry_records[0].url);
    EXPECT_EQ(AppCacheEntry::MASTER, entry_records[0].flags);
    EXPECT_EQ(1, entry_records[0].response_id);
    EXPECT_EQ(100, entry_records[0].response_size);

    // Verify quota bookkeeping
    EXPECT_EQ(100 + kDefaultEntrySize, storage()->usage_map_[kOrigin]);
    EXPECT_EQ(1, mock_quota_manager_proxy_->notify_storage_modified_count_);
    EXPECT_EQ(kOrigin, mock_quota_manager_proxy_->last_origin_);
    EXPECT_EQ(100, mock_quota_manager_proxy_->last_delta_);

    TestFinished();
  }

  // FailStoreGroup  --------------------------------------

  void FailStoreGroup() {
    // Store a group and its newest cache. Should complete asynchronously.
    PushNextTask(base::Bind(&AppCacheStorageImplTest::Verify_FailStoreGroup,
                            base::Unretained(this)));

    // Setup some preconditions. Create a group and newest cache that
    // appear to be "unstored" and big enough to exceed the 5M limit.
    const int64 kTooBig = 10 * 1024 * 1024;  // 10M
    group_ = new AppCacheGroup(
        storage(), kManifestUrl, storage()->NewGroupId());
    cache_ = new AppCache(storage(), storage()->NewCacheId());
    cache_->AddEntry(kManifestUrl,
                     AppCacheEntry(AppCacheEntry::MANIFEST, 1, kTooBig));
    // Hold a ref to the cache simulate the UpdateJob holding that ref,
    // and hold a ref to the group to simulate the CacheHost holding that ref.

    // Conduct the store test.
    storage()->StoreGroupAndNewestCache(group_.get(), cache_.get(), delegate());
    EXPECT_FALSE(delegate()->stored_group_success_);  // Expected to be async.
  }

  void Verify_FailStoreGroup() {
    EXPECT_FALSE(delegate()->stored_group_success_);
    EXPECT_TRUE(delegate()->would_exceed_quota_);

    // Should not have been stored in the database.
    AppCacheDatabase::GroupRecord group_record;
    AppCacheDatabase::CacheRecord cache_record;
    EXPECT_FALSE(database()->FindGroup(group_->group_id(), &group_record));
    EXPECT_FALSE(database()->FindCache(cache_->cache_id(), &cache_record));

    EXPECT_EQ(0, mock_quota_manager_proxy_->notify_storage_accessed_count_);
    EXPECT_EQ(0, mock_quota_manager_proxy_->notify_storage_modified_count_);

    TestFinished();
  }

  // MakeGroupObsolete  -------------------------------

  void MakeGroupObsolete() {
    // Make a group obsolete, should complete asynchronously.
    PushNextTask(base::Bind(&AppCacheStorageImplTest::Verify_MakeGroupObsolete,
                            base::Unretained(this)));

    // Setup some preconditions. Create a group and newest cache that
    // appears to be "stored" and "currently in use".
    MakeCacheAndGroup(kManifestUrl, 1, 1, true);
    EXPECT_EQ(kDefaultEntrySize, storage()->usage_map_[kOrigin]);

    // Also insert some related records.
    AppCacheDatabase::EntryRecord entry_record;
    entry_record.cache_id = 1;
    entry_record.flags = AppCacheEntry::FALLBACK;
    entry_record.response_id = 1;
    entry_record.url = kEntryUrl;
    EXPECT_TRUE(database()->InsertEntry(&entry_record));

    AppCacheDatabase::NamespaceRecord fallback_namespace_record;
    fallback_namespace_record.cache_id = 1;
    fallback_namespace_record.namespace_.target_url = kEntryUrl;
    fallback_namespace_record.namespace_.namespace_url = kFallbackNamespace;
    fallback_namespace_record.origin = kManifestUrl.GetOrigin();
    EXPECT_TRUE(database()->InsertNamespace(&fallback_namespace_record));

    AppCacheDatabase::OnlineWhiteListRecord online_whitelist_record;
    online_whitelist_record.cache_id = 1;
    online_whitelist_record.namespace_url = kOnlineNamespace;
    EXPECT_TRUE(database()->InsertOnlineWhiteList(&online_whitelist_record));

    // Conduct the test.
    storage()->MakeGroupObsolete(group_.get(), delegate());
    EXPECT_FALSE(group_->is_obsolete());
  }

  void Verify_MakeGroupObsolete() {
    EXPECT_TRUE(delegate()->obsoleted_success_);
    EXPECT_EQ(group_.get(), delegate()->obsoleted_group_.get());
    EXPECT_TRUE(group_->is_obsolete());
    EXPECT_TRUE(storage()->usage_map_.empty());

    // The cache and group have been deleted from the database.
    AppCacheDatabase::GroupRecord group_record;
    AppCacheDatabase::CacheRecord cache_record;
    EXPECT_FALSE(database()->FindGroup(1, &group_record));
    EXPECT_FALSE(database()->FindCache(1, &cache_record));

    // The related records should have been deleted too.
    std::vector<AppCacheDatabase::EntryRecord> entry_records;
    database()->FindEntriesForCache(1, &entry_records);
    EXPECT_TRUE(entry_records.empty());
    std::vector<AppCacheDatabase::NamespaceRecord> intercept_records;
    std::vector<AppCacheDatabase::NamespaceRecord> fallback_records;
    database()->FindNamespacesForCache(
        1, &intercept_records, &fallback_records);
    EXPECT_TRUE(fallback_records.empty());
    std::vector<AppCacheDatabase::OnlineWhiteListRecord> whitelist_records;
    database()->FindOnlineWhiteListForCache(1, &whitelist_records);
    EXPECT_TRUE(whitelist_records.empty());

    // Verify quota bookkeeping
    EXPECT_TRUE(storage()->usage_map_.empty());
    EXPECT_EQ(1, mock_quota_manager_proxy_->notify_storage_modified_count_);
    EXPECT_EQ(kOrigin, mock_quota_manager_proxy_->last_origin_);
    EXPECT_EQ(-kDefaultEntrySize, mock_quota_manager_proxy_->last_delta_);

    TestFinished();
  }

  // MarkEntryAsForeign  -------------------------------

  void MarkEntryAsForeign() {
    // Setup some preconditions. Create a cache with an entry
    // in storage and in the working set.
    MakeCacheAndGroup(kManifestUrl, 1, 1, true);
    cache_->AddEntry(kEntryUrl, AppCacheEntry(AppCacheEntry::EXPLICIT));
    AppCacheDatabase::EntryRecord entry_record;
    entry_record.cache_id = 1;
    entry_record.url = kEntryUrl;
    entry_record.flags = AppCacheEntry::EXPLICIT;
    entry_record.response_id = 0;
    EXPECT_TRUE(database()->InsertEntry(&entry_record));
    EXPECT_FALSE(cache_->GetEntry(kEntryUrl)->IsForeign());

    // Conduct the test.
    storage()->MarkEntryAsForeign(kEntryUrl, 1);

    // The entry in the working set should have been updated syncly.
    EXPECT_TRUE(cache_->GetEntry(kEntryUrl)->IsForeign());
    EXPECT_TRUE(cache_->GetEntry(kEntryUrl)->IsExplicit());

    // And the entry in storage should also be updated, but that
    // happens asynchronously on the db thread.
    FlushDbThreadTasks();
    AppCacheDatabase::EntryRecord entry_record2;
    EXPECT_TRUE(database()->FindEntry(1, kEntryUrl, &entry_record2));
    EXPECT_EQ(AppCacheEntry::EXPLICIT | AppCacheEntry::FOREIGN,
              entry_record2.flags);
    TestFinished();
  }

  // MarkEntryAsForeignWithLoadInProgress  -------------------------------

  void MarkEntryAsForeignWithLoadInProgress() {
    PushNextTask(base::Bind(
       &AppCacheStorageImplTest::Verify_MarkEntryAsForeignWithLoadInProgress,
       base::Unretained(this)));

    // Setup some preconditions. Create a cache with an entry
    // in storage, but not in the working set.
    MakeCacheAndGroup(kManifestUrl, 1, 1, true);
    cache_->AddEntry(kEntryUrl, AppCacheEntry(AppCacheEntry::EXPLICIT));
    AppCacheDatabase::EntryRecord entry_record;
    entry_record.cache_id = 1;
    entry_record.url = kEntryUrl;
    entry_record.flags = AppCacheEntry::EXPLICIT;
    entry_record.response_id = 0;
    EXPECT_TRUE(database()->InsertEntry(&entry_record));
    EXPECT_FALSE(cache_->GetEntry(kEntryUrl)->IsForeign());
    EXPECT_TRUE(cache_->HasOneRef());
    cache_ = NULL;
    group_ = NULL;

    // Conduct the test, start a cache load, and prior to completion
    // of that load, mark the entry as foreign.
    storage()->LoadCache(1, delegate());
    storage()->MarkEntryAsForeign(kEntryUrl, 1);
  }

  void Verify_MarkEntryAsForeignWithLoadInProgress() {
    EXPECT_EQ(1, delegate()->loaded_cache_id_);
    EXPECT_TRUE(delegate()->loaded_cache_.get());

    // The entry in the working set should have been updated upon load.
    EXPECT_TRUE(delegate()->loaded_cache_->GetEntry(kEntryUrl)->IsForeign());
    EXPECT_TRUE(delegate()->loaded_cache_->GetEntry(kEntryUrl)->IsExplicit());

    // And the entry in storage should also be updated.
    FlushDbThreadTasks();
    AppCacheDatabase::EntryRecord entry_record;
    EXPECT_TRUE(database()->FindEntry(1, kEntryUrl, &entry_record));
    EXPECT_EQ(AppCacheEntry::EXPLICIT | AppCacheEntry::FOREIGN,
              entry_record.flags);
    TestFinished();
  }

  // FindNoMainResponse  -------------------------------

  void FindNoMainResponse() {
    PushNextTask(base::Bind(&AppCacheStorageImplTest::Verify_FindNoMainResponse,
                            base::Unretained(this)));

    // Conduct the test.
    storage()->FindResponseForMainRequest(kEntryUrl, GURL(), delegate());
    EXPECT_NE(kEntryUrl, delegate()->found_url_);
  }

  void Verify_FindNoMainResponse() {
    EXPECT_EQ(kEntryUrl, delegate()->found_url_);
    EXPECT_TRUE(delegate()->found_manifest_url_.is_empty());
    EXPECT_EQ(kNoCacheId, delegate()->found_cache_id_);
    EXPECT_EQ(kNoResponseId, delegate()->found_entry_.response_id());
    EXPECT_EQ(kNoResponseId, delegate()->found_fallback_entry_.response_id());
    EXPECT_TRUE(delegate()->found_namespace_entry_url_.is_empty());
    EXPECT_EQ(0, delegate()->found_entry_.types());
    EXPECT_EQ(0, delegate()->found_fallback_entry_.types());
    TestFinished();
  }

  // BasicFindMainResponse  -------------------------------

  void BasicFindMainResponseInDatabase() {
    BasicFindMainResponse(true);
  }

  void BasicFindMainResponseInWorkingSet() {
    BasicFindMainResponse(false);
  }

  void BasicFindMainResponse(bool drop_from_working_set) {
    PushNextTask(base::Bind(
        &AppCacheStorageImplTest::Verify_BasicFindMainResponse,
        base::Unretained(this)));

    // Setup some preconditions. Create a complete cache with an entry
    // in storage.
    MakeCacheAndGroup(kManifestUrl, 2, 1, true);
    cache_->AddEntry(kEntryUrl, AppCacheEntry(AppCacheEntry::EXPLICIT, 1));
    AppCacheDatabase::EntryRecord entry_record;
    entry_record.cache_id = 1;
    entry_record.url = kEntryUrl;
    entry_record.flags = AppCacheEntry::EXPLICIT;
    entry_record.response_id = 1;
    EXPECT_TRUE(database()->InsertEntry(&entry_record));

    // Optionally drop the cache/group pair from the working set.
    if (drop_from_working_set) {
      EXPECT_TRUE(cache_->HasOneRef());
      cache_ = NULL;
      EXPECT_TRUE(group_->HasOneRef());
      group_ = NULL;
    }

    // Conduct the test.
    storage()->FindResponseForMainRequest(kEntryUrl, GURL(), delegate());
    EXPECT_NE(kEntryUrl,  delegate()->found_url_);
  }

  void Verify_BasicFindMainResponse() {
    EXPECT_EQ(kEntryUrl, delegate()->found_url_);
    EXPECT_EQ(kManifestUrl, delegate()->found_manifest_url_);
    EXPECT_EQ(1, delegate()->found_cache_id_);
    EXPECT_EQ(2, delegate()->found_group_id_);
    EXPECT_EQ(1, delegate()->found_entry_.response_id());
    EXPECT_TRUE(delegate()->found_entry_.IsExplicit());
    EXPECT_FALSE(delegate()->found_fallback_entry_.has_response_id());
    TestFinished();
  }

  // BasicFindMainFallbackResponse  -------------------------------

  void BasicFindMainFallbackResponseInDatabase() {
    BasicFindMainFallbackResponse(true);
  }

  void BasicFindMainFallbackResponseInWorkingSet() {
    BasicFindMainFallbackResponse(false);
  }

  void BasicFindMainFallbackResponse(bool drop_from_working_set) {
    PushNextTask(base::Bind(
        &AppCacheStorageImplTest::Verify_BasicFindMainFallbackResponse,
        base::Unretained(this)));

    // Setup some preconditions. Create a complete cache with a
    // fallback namespace and entry.
    MakeCacheAndGroup(kManifestUrl, 2, 1, true);
    cache_->AddEntry(kEntryUrl, AppCacheEntry(AppCacheEntry::FALLBACK, 1));
    cache_->AddEntry(kEntryUrl2, AppCacheEntry(AppCacheEntry::FALLBACK, 2));
    cache_->fallback_namespaces_.push_back(
        Namespace(FALLBACK_NAMESPACE, kFallbackNamespace2, kEntryUrl2, false));
    cache_->fallback_namespaces_.push_back(
        Namespace(FALLBACK_NAMESPACE, kFallbackNamespace, kEntryUrl, false));
    AppCacheDatabase::CacheRecord cache_record;
    std::vector<AppCacheDatabase::EntryRecord> entries;
    std::vector<AppCacheDatabase::NamespaceRecord> intercepts;
    std::vector<AppCacheDatabase::NamespaceRecord> fallbacks;
    std::vector<AppCacheDatabase::OnlineWhiteListRecord> whitelists;
    cache_->ToDatabaseRecords(group_.get(),
                              &cache_record,
                              &entries,
                              &intercepts,
                              &fallbacks,
                              &whitelists);

    std::vector<AppCacheDatabase::EntryRecord>::const_iterator iter =
        entries.begin();
    while (iter != entries.end()) {
      // MakeCacheAndGroup has inserted the default entry record already.
      if (iter->url != kDefaultEntryUrl)
        EXPECT_TRUE(database()->InsertEntry(&(*iter)));
      ++iter;
    }

    EXPECT_TRUE(database()->InsertNamespaceRecords(fallbacks));
    EXPECT_TRUE(database()->InsertOnlineWhiteListRecords(whitelists));
    if (drop_from_working_set) {
      EXPECT_TRUE(cache_->HasOneRef());
      cache_ = NULL;
      EXPECT_TRUE(group_->HasOneRef());
      group_ = NULL;
    }

    // Conduct the test. The test url is in both fallback namespace urls,
    // but should match the longer of the two.
    storage()->FindResponseForMainRequest(kFallbackTestUrl, GURL(), delegate());
    EXPECT_NE(kFallbackTestUrl, delegate()->found_url_);
  }

  void Verify_BasicFindMainFallbackResponse() {
    EXPECT_EQ(kFallbackTestUrl, delegate()->found_url_);
    EXPECT_EQ(kManifestUrl, delegate()->found_manifest_url_);
    EXPECT_EQ(1, delegate()->found_cache_id_);
    EXPECT_EQ(2, delegate()->found_group_id_);
    EXPECT_FALSE(delegate()->found_entry_.has_response_id());
    EXPECT_EQ(2, delegate()->found_fallback_entry_.response_id());
    EXPECT_EQ(kEntryUrl2, delegate()->found_namespace_entry_url_);
    EXPECT_TRUE(delegate()->found_fallback_entry_.IsFallback());
    TestFinished();
  }

  // BasicFindMainInterceptResponse  -------------------------------

  void BasicFindMainInterceptResponseInDatabase() {
    BasicFindMainInterceptResponse(true);
  }

  void BasicFindMainInterceptResponseInWorkingSet() {
    BasicFindMainInterceptResponse(false);
  }

  void BasicFindMainInterceptResponse(bool drop_from_working_set) {
    PushNextTask(base::Bind(
        &AppCacheStorageImplTest::Verify_BasicFindMainInterceptResponse,
        base::Unretained(this)));

    // Setup some preconditions. Create a complete cache with an
    // intercept namespace and entry.
    MakeCacheAndGroup(kManifestUrl, 2, 1, true);
    cache_->AddEntry(kEntryUrl, AppCacheEntry(AppCacheEntry::INTERCEPT, 1));
    cache_->AddEntry(kEntryUrl2, AppCacheEntry(AppCacheEntry::INTERCEPT, 2));
    cache_->intercept_namespaces_.push_back(
        Namespace(INTERCEPT_NAMESPACE, kInterceptNamespace2,
                  kEntryUrl2, false));
    cache_->intercept_namespaces_.push_back(
        Namespace(INTERCEPT_NAMESPACE, kInterceptNamespace,
                  kEntryUrl, false));
    AppCacheDatabase::CacheRecord cache_record;
    std::vector<AppCacheDatabase::EntryRecord> entries;
    std::vector<AppCacheDatabase::NamespaceRecord> intercepts;
    std::vector<AppCacheDatabase::NamespaceRecord> fallbacks;
    std::vector<AppCacheDatabase::OnlineWhiteListRecord> whitelists;
    cache_->ToDatabaseRecords(group_.get(),
                              &cache_record,
                              &entries,
                              &intercepts,
                              &fallbacks,
                              &whitelists);

    std::vector<AppCacheDatabase::EntryRecord>::const_iterator iter =
        entries.begin();
    while (iter != entries.end()) {
      // MakeCacheAndGroup has inserted  the default entry record already
      if (iter->url != kDefaultEntryUrl)
        EXPECT_TRUE(database()->InsertEntry(&(*iter)));
      ++iter;
    }

    EXPECT_TRUE(database()->InsertNamespaceRecords(intercepts));
    EXPECT_TRUE(database()->InsertOnlineWhiteListRecords(whitelists));
    if (drop_from_working_set) {
      EXPECT_TRUE(cache_->HasOneRef());
      cache_ = NULL;
      EXPECT_TRUE(group_->HasOneRef());
      group_ = NULL;
    }

    // Conduct the test. The test url is in both intercept namespaces,
    // but should match the longer of the two.
    storage()->FindResponseForMainRequest(
        kInterceptTestUrl, GURL(), delegate());
    EXPECT_NE(kInterceptTestUrl, delegate()->found_url_);
  }

  void Verify_BasicFindMainInterceptResponse() {
    EXPECT_EQ(kInterceptTestUrl, delegate()->found_url_);
    EXPECT_EQ(kManifestUrl, delegate()->found_manifest_url_);
    EXPECT_EQ(1, delegate()->found_cache_id_);
    EXPECT_EQ(2, delegate()->found_group_id_);
    EXPECT_EQ(2, delegate()->found_entry_.response_id());
    EXPECT_TRUE(delegate()->found_entry_.IsIntercept());
    EXPECT_EQ(kEntryUrl2, delegate()->found_namespace_entry_url_);
    EXPECT_FALSE(delegate()->found_fallback_entry_.has_response_id());
    TestFinished();
  }

  // FindInterceptPatternMatch ----------------------------------------

  void FindInterceptPatternMatchInDatabase() {
    FindInterceptPatternMatch(true);
  }

  void FindInterceptPatternMatchInWorkingSet() {
    FindInterceptPatternMatch(false);
  }

  void FindInterceptPatternMatch(bool drop_from_working_set) {
    // Setup some preconditions. Create a complete cache with an
    // pattern matching intercept namespace and entry.
    MakeCacheAndGroup(kManifestUrl, 2, 1, true);
    cache_->AddEntry(kEntryUrl, AppCacheEntry(AppCacheEntry::INTERCEPT, 1));
    cache_->intercept_namespaces_.push_back(
        Namespace(INTERCEPT_NAMESPACE, kInterceptPatternNamespace,
                  kEntryUrl, true));
    AppCacheDatabase::CacheRecord cache_record;
    std::vector<AppCacheDatabase::EntryRecord> entries;
    std::vector<AppCacheDatabase::NamespaceRecord> intercepts;
    std::vector<AppCacheDatabase::NamespaceRecord> fallbacks;
    std::vector<AppCacheDatabase::OnlineWhiteListRecord> whitelists;
    cache_->ToDatabaseRecords(group_.get(),
                              &cache_record,
                              &entries,
                              &intercepts,
                              &fallbacks,
                              &whitelists);

    std::vector<AppCacheDatabase::EntryRecord>::const_iterator iter =
        entries.begin();
    while (iter != entries.end()) {
      // MakeCacheAndGroup has inserted  the default entry record already
      if (iter->url != kDefaultEntryUrl)
        EXPECT_TRUE(database()->InsertEntry(&(*iter)));
      ++iter;
    }

    EXPECT_TRUE(database()->InsertNamespaceRecords(intercepts));
    if (drop_from_working_set) {
      EXPECT_TRUE(cache_->HasOneRef());
      cache_ = NULL;
      EXPECT_TRUE(group_->HasOneRef());
      group_ = NULL;
    }

    // First test something that does not match the pattern.
    PushNextTask(base::Bind(
        &AppCacheStorageImplTest::Verify_FindInterceptPatternMatchNegative,
        base::Unretained(this)));
    storage()->FindResponseForMainRequest(
        kInterceptPatternTestNegativeUrl, GURL(), delegate());
    EXPECT_EQ(GURL(), delegate()->found_url_);  // Is always async.
  }

  void Verify_FindInterceptPatternMatchNegative() {
    EXPECT_EQ(kInterceptPatternTestNegativeUrl, delegate()->found_url_);
    EXPECT_TRUE(delegate()->found_manifest_url_.is_empty());
    EXPECT_EQ(kNoCacheId, delegate()->found_cache_id_);
    EXPECT_EQ(kNoResponseId, delegate()->found_entry_.response_id());
    EXPECT_EQ(kNoResponseId, delegate()->found_fallback_entry_.response_id());
    EXPECT_TRUE(delegate()->found_namespace_entry_url_.is_empty());
    EXPECT_EQ(0, delegate()->found_entry_.types());
    EXPECT_EQ(0, delegate()->found_fallback_entry_.types());

    // Then test something that matches.
    PushNextTask(base::Bind(
        &AppCacheStorageImplTest::Verify_FindInterceptPatternMatchPositive,
        base::Unretained(this)));
    storage()->FindResponseForMainRequest(
        kInterceptPatternTestPositiveUrl, GURL(), delegate());
  }

  void Verify_FindInterceptPatternMatchPositive() {
    EXPECT_EQ(kInterceptPatternTestPositiveUrl, delegate()->found_url_);
    EXPECT_EQ(kManifestUrl, delegate()->found_manifest_url_);
    EXPECT_EQ(1, delegate()->found_cache_id_);
    EXPECT_EQ(2, delegate()->found_group_id_);
    EXPECT_EQ(1, delegate()->found_entry_.response_id());
    EXPECT_TRUE(delegate()->found_entry_.IsIntercept());
    EXPECT_EQ(kEntryUrl, delegate()->found_namespace_entry_url_);
    EXPECT_FALSE(delegate()->found_fallback_entry_.has_response_id());
    TestFinished();
  }

  // FindFallbackPatternMatch  -------------------------------

  void FindFallbackPatternMatchInDatabase() {
    FindFallbackPatternMatch(true);
  }

  void FindFallbackPatternMatchInWorkingSet() {
    FindFallbackPatternMatch(false);
  }

  void FindFallbackPatternMatch(bool drop_from_working_set) {
    // Setup some preconditions. Create a complete cache with a
    // pattern matching fallback namespace and entry.
    MakeCacheAndGroup(kManifestUrl, 2, 1, true);
    cache_->AddEntry(kEntryUrl, AppCacheEntry(AppCacheEntry::FALLBACK, 1));
    cache_->fallback_namespaces_.push_back(
        Namespace(FALLBACK_NAMESPACE, kFallbackPatternNamespace,
                  kEntryUrl, true));
    AppCacheDatabase::CacheRecord cache_record;
    std::vector<AppCacheDatabase::EntryRecord> entries;
    std::vector<AppCacheDatabase::NamespaceRecord> intercepts;
    std::vector<AppCacheDatabase::NamespaceRecord> fallbacks;
    std::vector<AppCacheDatabase::OnlineWhiteListRecord> whitelists;
    cache_->ToDatabaseRecords(group_.get(),
                              &cache_record,
                              &entries,
                              &intercepts,
                              &fallbacks,
                              &whitelists);

    std::vector<AppCacheDatabase::EntryRecord>::const_iterator iter =
        entries.begin();
    while (iter != entries.end()) {
      // MakeCacheAndGroup has inserted the default entry record already.
      if (iter->url != kDefaultEntryUrl)
        EXPECT_TRUE(database()->InsertEntry(&(*iter)));
      ++iter;
    }

    EXPECT_TRUE(database()->InsertNamespaceRecords(fallbacks));
    if (drop_from_working_set) {
      EXPECT_TRUE(cache_->HasOneRef());
      cache_ = NULL;
      EXPECT_TRUE(group_->HasOneRef());
      group_ = NULL;
    }

    // First test something that does not match the pattern.
    PushNextTask(base::Bind(
        &AppCacheStorageImplTest::Verify_FindFallbackPatternMatchNegative,
        base::Unretained(this)));
    storage()->FindResponseForMainRequest(
        kFallbackPatternTestNegativeUrl, GURL(), delegate());
    EXPECT_EQ(GURL(), delegate()->found_url_);  // Is always async.
  }

  void Verify_FindFallbackPatternMatchNegative() {
    EXPECT_EQ(kFallbackPatternTestNegativeUrl, delegate()->found_url_);
      EXPECT_TRUE(delegate()->found_manifest_url_.is_empty());
      EXPECT_EQ(kNoCacheId, delegate()->found_cache_id_);
      EXPECT_EQ(kNoResponseId, delegate()->found_entry_.response_id());
      EXPECT_EQ(kNoResponseId, delegate()->found_fallback_entry_.response_id());
      EXPECT_TRUE(delegate()->found_namespace_entry_url_.is_empty());
      EXPECT_EQ(0, delegate()->found_entry_.types());
      EXPECT_EQ(0, delegate()->found_fallback_entry_.types());

      // Then test something that matches.
      PushNextTask(base::Bind(
          &AppCacheStorageImplTest::Verify_FindFallbackPatternMatchPositive,
          base::Unretained(this)));
      storage()->FindResponseForMainRequest(
          kFallbackPatternTestPositiveUrl, GURL(), delegate());
  }

  void Verify_FindFallbackPatternMatchPositive() {
    EXPECT_EQ(kFallbackPatternTestPositiveUrl, delegate()->found_url_);
    EXPECT_EQ(kManifestUrl, delegate()->found_manifest_url_);
    EXPECT_EQ(1, delegate()->found_cache_id_);
    EXPECT_EQ(2, delegate()->found_group_id_);
    EXPECT_EQ(1, delegate()->found_fallback_entry_.response_id());
    EXPECT_TRUE(delegate()->found_fallback_entry_.IsFallback());
    EXPECT_EQ(kEntryUrl, delegate()->found_namespace_entry_url_);
    EXPECT_FALSE(delegate()->found_entry_.has_response_id());
    TestFinished();
  }

  // FindMainResponseWithMultipleHits  -------------------------------

  void FindMainResponseWithMultipleHits() {
    PushNextTask(base::Bind(
        &AppCacheStorageImplTest::Verify_FindMainResponseWithMultipleHits,
        base::Unretained(this)));

    // Setup some preconditions, create a few caches with an identical set
    // of entries and fallback namespaces. Only the last one remains in
    // the working set to simulate appearing as "in use".
    MakeMultipleHitCacheAndGroup(kManifestUrl, 1);
    MakeMultipleHitCacheAndGroup(kManifestUrl2, 2);
    MakeMultipleHitCacheAndGroup(kManifestUrl3, 3);

    // Conduct the test, we should find the response from the last cache
    // since it's "in use".
    storage()->FindResponseForMainRequest(kEntryUrl, GURL(), delegate());
    EXPECT_NE(kEntryUrl, delegate()->found_url_);
  }

  void MakeMultipleHitCacheAndGroup(const GURL& manifest_url, int id) {
    MakeCacheAndGroup(manifest_url, id, id, true);
    AppCacheDatabase::EntryRecord entry_record;

    // Add an entry for kEntryUrl
    entry_record.cache_id = id;
    entry_record.url = kEntryUrl;
    entry_record.flags = AppCacheEntry::EXPLICIT;
    entry_record.response_id = id;
    EXPECT_TRUE(database()->InsertEntry(&entry_record));
    cache_->AddEntry(
        entry_record.url,
        AppCacheEntry(entry_record.flags, entry_record.response_id));

    // Add an entry for the manifestUrl
    entry_record.cache_id = id;
    entry_record.url = manifest_url;
    entry_record.flags = AppCacheEntry::MANIFEST;
    entry_record.response_id = id + kManifestEntryIdOffset;
    EXPECT_TRUE(database()->InsertEntry(&entry_record));
    cache_->AddEntry(
        entry_record.url,
        AppCacheEntry(entry_record.flags, entry_record.response_id));

    // Add a fallback entry and namespace
    entry_record.cache_id = id;
    entry_record.url = kEntryUrl2;
    entry_record.flags = AppCacheEntry::FALLBACK;
    entry_record.response_id = id + kFallbackEntryIdOffset;
    EXPECT_TRUE(database()->InsertEntry(&entry_record));
    cache_->AddEntry(
        entry_record.url,
        AppCacheEntry(entry_record.flags, entry_record.response_id));
    AppCacheDatabase::NamespaceRecord fallback_namespace_record;
    fallback_namespace_record.cache_id = id;
    fallback_namespace_record.namespace_.target_url = entry_record.url;
    fallback_namespace_record.namespace_.namespace_url = kFallbackNamespace;
    fallback_namespace_record.origin = manifest_url.GetOrigin();
    EXPECT_TRUE(database()->InsertNamespace(&fallback_namespace_record));
    cache_->fallback_namespaces_.push_back(
        Namespace(FALLBACK_NAMESPACE, kFallbackNamespace, kEntryUrl2, false));
  }

  void Verify_FindMainResponseWithMultipleHits() {
    EXPECT_EQ(kEntryUrl, delegate()->found_url_);
    EXPECT_EQ(kManifestUrl3, delegate()->found_manifest_url_);
    EXPECT_EQ(3, delegate()->found_cache_id_);
    EXPECT_EQ(3, delegate()->found_group_id_);
    EXPECT_EQ(3, delegate()->found_entry_.response_id());
    EXPECT_TRUE(delegate()->found_entry_.IsExplicit());
    EXPECT_FALSE(delegate()->found_fallback_entry_.has_response_id());

    // Conduct another test perferring kManifestUrl
    delegate_.reset(new MockStorageDelegate(this));
    PushNextTask(base::Bind(
        &AppCacheStorageImplTest::Verify_FindMainResponseWithMultipleHits2,
        base::Unretained(this)));
    storage()->FindResponseForMainRequest(kEntryUrl, kManifestUrl, delegate());
    EXPECT_NE(kEntryUrl, delegate()->found_url_);
  }

  void Verify_FindMainResponseWithMultipleHits2() {
    EXPECT_EQ(kEntryUrl, delegate()->found_url_);
    EXPECT_EQ(kManifestUrl, delegate()->found_manifest_url_);
    EXPECT_EQ(1, delegate()->found_cache_id_);
    EXPECT_EQ(1, delegate()->found_group_id_);
    EXPECT_EQ(1, delegate()->found_entry_.response_id());
    EXPECT_TRUE(delegate()->found_entry_.IsExplicit());
    EXPECT_FALSE(delegate()->found_fallback_entry_.has_response_id());

    // Conduct the another test perferring kManifestUrl2
    delegate_.reset(new MockStorageDelegate(this));
    PushNextTask(base::Bind(
        &AppCacheStorageImplTest::Verify_FindMainResponseWithMultipleHits3,
        base::Unretained(this)));
    storage()->FindResponseForMainRequest(kEntryUrl, kManifestUrl2, delegate());
    EXPECT_NE(kEntryUrl, delegate()->found_url_);
  }

  void Verify_FindMainResponseWithMultipleHits3() {
    EXPECT_EQ(kEntryUrl, delegate()->found_url_);
    EXPECT_EQ(kManifestUrl2, delegate()->found_manifest_url_);
    EXPECT_EQ(2, delegate()->found_cache_id_);
    EXPECT_EQ(2, delegate()->found_group_id_);
    EXPECT_EQ(2, delegate()->found_entry_.response_id());
    EXPECT_TRUE(delegate()->found_entry_.IsExplicit());
    EXPECT_FALSE(delegate()->found_fallback_entry_.has_response_id());

    // Conduct another test with no preferred manifest that hits the fallback.
    delegate_.reset(new MockStorageDelegate(this));
    PushNextTask(base::Bind(
        &AppCacheStorageImplTest::Verify_FindMainResponseWithMultipleHits4,
        base::Unretained(this)));
    storage()->FindResponseForMainRequest(
        kFallbackTestUrl, GURL(), delegate());
    EXPECT_NE(kFallbackTestUrl, delegate()->found_url_);
  }

  void Verify_FindMainResponseWithMultipleHits4() {
    EXPECT_EQ(kFallbackTestUrl, delegate()->found_url_);
    EXPECT_EQ(kManifestUrl3, delegate()->found_manifest_url_);
    EXPECT_EQ(3, delegate()->found_cache_id_);
    EXPECT_EQ(3, delegate()->found_group_id_);
    EXPECT_FALSE(delegate()->found_entry_.has_response_id());
    EXPECT_EQ(3 + kFallbackEntryIdOffset,
              delegate()->found_fallback_entry_.response_id());
    EXPECT_TRUE(delegate()->found_fallback_entry_.IsFallback());
    EXPECT_EQ(kEntryUrl2, delegate()->found_namespace_entry_url_);

    // Conduct another test preferring kManifestUrl2 that hits the fallback.
    delegate_.reset(new MockStorageDelegate(this));
    PushNextTask(base::Bind(
        &AppCacheStorageImplTest::Verify_FindMainResponseWithMultipleHits5,
        base::Unretained(this)));
    storage()->FindResponseForMainRequest(
        kFallbackTestUrl, kManifestUrl2, delegate());
    EXPECT_NE(kFallbackTestUrl, delegate()->found_url_);
  }

  void Verify_FindMainResponseWithMultipleHits5() {
    EXPECT_EQ(kFallbackTestUrl, delegate()->found_url_);
    EXPECT_EQ(kManifestUrl2, delegate()->found_manifest_url_);
    EXPECT_EQ(2, delegate()->found_cache_id_);
    EXPECT_EQ(2, delegate()->found_group_id_);
    EXPECT_FALSE(delegate()->found_entry_.has_response_id());
    EXPECT_EQ(2 + kFallbackEntryIdOffset,
              delegate()->found_fallback_entry_.response_id());
    EXPECT_TRUE(delegate()->found_fallback_entry_.IsFallback());
    EXPECT_EQ(kEntryUrl2, delegate()->found_namespace_entry_url_);

    TestFinished();
  }

  // FindMainResponseExclusions  -------------------------------

  void FindMainResponseExclusionsInDatabase() {
    FindMainResponseExclusions(true);
  }

  void FindMainResponseExclusionsInWorkingSet() {
    FindMainResponseExclusions(false);
  }

  void FindMainResponseExclusions(bool drop_from_working_set) {
    // Setup some preconditions. Create a complete cache with a
    // foreign entry, an online namespace, and a second online
    // namespace nested within a fallback namespace.
    MakeCacheAndGroup(kManifestUrl, 1, 1, true);
    cache_->AddEntry(kEntryUrl,
        AppCacheEntry(AppCacheEntry::EXPLICIT | AppCacheEntry::FOREIGN, 1));
    cache_->AddEntry(kEntryUrl2, AppCacheEntry(AppCacheEntry::FALLBACK, 2));
    cache_->fallback_namespaces_.push_back(
        Namespace(FALLBACK_NAMESPACE, kFallbackNamespace, kEntryUrl2, false));
    cache_->online_whitelist_namespaces_.push_back(
        Namespace(NETWORK_NAMESPACE, kOnlineNamespace,
                  GURL(), false));
    cache_->online_whitelist_namespaces_.push_back(
        Namespace(NETWORK_NAMESPACE, kOnlineNamespaceWithinFallback,
                  GURL(), false));

    AppCacheDatabase::EntryRecord entry_record;
    entry_record.cache_id = 1;
    entry_record.url = kEntryUrl;
    entry_record.flags = AppCacheEntry::EXPLICIT | AppCacheEntry::FOREIGN;
    entry_record.response_id = 1;
    EXPECT_TRUE(database()->InsertEntry(&entry_record));
    AppCacheDatabase::OnlineWhiteListRecord whitelist_record;
    whitelist_record.cache_id = 1;
    whitelist_record.namespace_url = kOnlineNamespace;
    EXPECT_TRUE(database()->InsertOnlineWhiteList(&whitelist_record));
    AppCacheDatabase::NamespaceRecord fallback_namespace_record;
    fallback_namespace_record.cache_id = 1;
    fallback_namespace_record.namespace_.target_url = kEntryUrl2;
    fallback_namespace_record.namespace_.namespace_url = kFallbackNamespace;
    fallback_namespace_record.origin = kManifestUrl.GetOrigin();
    EXPECT_TRUE(database()->InsertNamespace(&fallback_namespace_record));
    whitelist_record.cache_id = 1;
    whitelist_record.namespace_url = kOnlineNamespaceWithinFallback;
    EXPECT_TRUE(database()->InsertOnlineWhiteList(&whitelist_record));
    if (drop_from_working_set) {
      cache_ = NULL;
      group_ = NULL;
    }

    // We should not find anything for the foreign entry.
    PushNextTask(base::Bind(&AppCacheStorageImplTest::Verify_ExclusionNotFound,
                            base::Unretained(this), kEntryUrl, 1));
    storage()->FindResponseForMainRequest(kEntryUrl, GURL(), delegate());
  }

  void Verify_ExclusionNotFound(GURL expected_url, int phase) {
    EXPECT_EQ(expected_url, delegate()->found_url_);
    EXPECT_TRUE(delegate()->found_manifest_url_.is_empty());
    EXPECT_EQ(kNoCacheId, delegate()->found_cache_id_);
    EXPECT_EQ(0, delegate()->found_group_id_);
    EXPECT_EQ(kNoResponseId, delegate()->found_entry_.response_id());
    EXPECT_EQ(kNoResponseId, delegate()->found_fallback_entry_.response_id());
    EXPECT_TRUE(delegate()->found_namespace_entry_url_.is_empty());
    EXPECT_EQ(0, delegate()->found_entry_.types());
    EXPECT_EQ(0, delegate()->found_fallback_entry_.types());

    if (phase == 1) {
      // We should not find anything for the online namespace.
      PushNextTask(
          base::Bind(&AppCacheStorageImplTest::Verify_ExclusionNotFound,
                     base::Unretained(this), kOnlineNamespace, 2));
      storage()->FindResponseForMainRequest(
          kOnlineNamespace, GURL(), delegate());
      return;
    }
    if (phase == 2) {
      // We should not find anything for the online namespace nested within
      // the fallback namespace.
      PushNextTask(base::Bind(
          &AppCacheStorageImplTest::Verify_ExclusionNotFound,
          base::Unretained(this), kOnlineNamespaceWithinFallback, 3));
      storage()->FindResponseForMainRequest(
          kOnlineNamespaceWithinFallback, GURL(), delegate());
      return;
    }

    TestFinished();
  }

  // Reinitialize  -------------------------------
  // This test is somewhat of a system integration test.
  // It relies on running a mock http server on our IO thread,
  // and involves other appcache classes to get some code
  // coverage thruout when Reinitialize happens.

  class MockServiceObserver : public AppCacheService::Observer {
   public:
    explicit MockServiceObserver(AppCacheStorageImplTest* test)
        : test_(test) {}

    virtual void OnServiceReinitialized(
        AppCacheStorageReference* old_storage_ref) OVERRIDE {
      observed_old_storage_ = old_storage_ref;
      test_->ScheduleNextTask();
    }

    scoped_refptr<AppCacheStorageReference> observed_old_storage_;
    AppCacheStorageImplTest* test_;
  };

  class MockAppCacheFrontend : public AppCacheFrontend {
   public:
    MockAppCacheFrontend() : error_event_was_raised_(false) {}

    virtual void OnCacheSelected(
        int host_id, const appcache::AppCacheInfo& info) OVERRIDE {}
    virtual void OnStatusChanged(const std::vector<int>& host_ids,
                                 Status status) OVERRIDE {}
    virtual void OnEventRaised(const std::vector<int>& host_ids,
                               EventID event_id) OVERRIDE {}
    virtual void OnProgressEventRaised(
        const std::vector<int>& host_ids,
        const GURL& url,
        int num_total, int num_complete) OVERRIDE {}
    virtual void OnErrorEventRaised(const std::vector<int>& host_ids,
                                    const std::string& message) OVERRIDE {
      error_event_was_raised_ = true;
    }
    virtual void OnLogMessage(int host_id, LogLevel log_level,
                              const std::string& message) OVERRIDE {}
    virtual void OnContentBlocked(
        int host_id, const GURL& manifest_url) OVERRIDE {}

    bool error_event_was_raised_;
  };

  void Reinitialize1() {
    Reinitialize(1);
  }

  void Reinitialize2() {
    Reinitialize(2);
  }

  void Reinitialize(int test_case) {
    // Unlike all of the other tests, this one actually read/write files.
    ASSERT_TRUE(temp_directory_.CreateUniqueTempDir());

    // Create a corrupt/unopenable disk_cache index file.
    const std::string kCorruptData("deadbeef");
    base::FilePath disk_cache_directory =
        temp_directory_.path().AppendASCII("Cache");
    ASSERT_TRUE(base::CreateDirectory(disk_cache_directory));
    base::FilePath index_file = disk_cache_directory.AppendASCII("index");
    EXPECT_EQ(static_cast<int>(kCorruptData.length()),
              file_util::WriteFile(
                  index_file, kCorruptData.data(), kCorruptData.length()));

    // Create records for a degenerate cached manifest that only contains
    // one entry for the manifest file resource.
    if (test_case == 2) {
      AppCacheDatabase db(temp_directory_.path().AppendASCII("Index"));
      GURL manifest_url = MockHttpServer::GetMockUrl("manifest");

      AppCacheDatabase::GroupRecord group_record;
      group_record.group_id = 1;
      group_record.manifest_url = manifest_url;
      group_record.origin = manifest_url.GetOrigin();
      EXPECT_TRUE(db.InsertGroup(&group_record));
      AppCacheDatabase::CacheRecord cache_record;
      cache_record.cache_id = 1;
      cache_record.group_id = 1;
      cache_record.online_wildcard = false;
      cache_record.update_time = kZeroTime;
      cache_record.cache_size = kDefaultEntrySize;
      EXPECT_TRUE(db.InsertCache(&cache_record));
      AppCacheDatabase::EntryRecord entry_record;
      entry_record.cache_id = 1;
      entry_record.url = manifest_url;
      entry_record.flags = AppCacheEntry::MANIFEST;
      entry_record.response_id = 1;
      entry_record.response_size = kDefaultEntrySize;
      EXPECT_TRUE(db.InsertEntry(&entry_record));
    }

    // Recreate the service to point at the db and corruption on disk.
    service_.reset(new AppCacheService(NULL));
    service_->set_request_context(io_thread->request_context());
    service_->Initialize(
        temp_directory_.path(),
        db_thread->message_loop_proxy().get(),
        db_thread->message_loop_proxy().get());
    mock_quota_manager_proxy_ = new MockQuotaManagerProxy();
    service_->quota_manager_proxy_ = mock_quota_manager_proxy_;
    delegate_.reset(new MockStorageDelegate(this));

    // Additional setup to observe reinitailize happens.
    observer_.reset(new MockServiceObserver(this));
    service_->AddObserver(observer_.get());

    // We continue after the init task is complete including the callback
    // on the current thread.
    FlushDbThreadTasks();
    base::MessageLoop::current()->PostTask(
        FROM_HERE,
        base::Bind(&AppCacheStorageImplTest::Continue_Reinitialize,
                   base::Unretained(this),
                   test_case));
  }

  void Continue_Reinitialize(int test_case) {
    const int kMockProcessId = 1;
    backend_.reset(new AppCacheBackendImpl);
    backend_->Initialize(service_.get(), &frontend_, kMockProcessId);

    if (test_case == 1) {
      // Try to create a new appcache, the resulting update job will
      // eventually fail when it gets to disk cache initialization.
      backend_->RegisterHost(1);
      AppCacheHost* host1 = backend_->GetHost(1);
      const GURL kEmptyPageUrl(MockHttpServer::GetMockUrl("empty.html"));
      host1->first_party_url_ = kEmptyPageUrl;
      host1->SelectCache(kEmptyPageUrl,
                         kNoCacheId,
                         MockHttpServer::GetMockUrl("manifest"));
    } else {
      ASSERT_EQ(2, test_case);
      // Try to access the existing cache manifest.
      // The URLRequestJob  will eventually fail when it gets to disk
      // cache initialization.
      backend_->RegisterHost(2);
      AppCacheHost* host2 = backend_->GetHost(2);
      GURL manifest_url = MockHttpServer::GetMockUrl("manifest");
      request_ = service()->request_context()->CreateRequest(
          manifest_url, net::DEFAULT_PRIORITY, NULL);
      AppCacheInterceptor::SetExtraRequestInfo(
          request_.get(), service_.get(),
          backend_->process_id(), host2->host_id(),
          ResourceType::MAIN_FRAME);
      request_->Start();
    }

    PushNextTask(base::Bind(
        &AppCacheStorageImplTest::Verify_Reinitialized,
        base::Unretained(this),
        test_case));
  }

  void Verify_Reinitialized(int test_case) {
    // Verify we got notified of reinit and a new storage instance is created,
    // and that the old data has been deleted.
    EXPECT_TRUE(observer_->observed_old_storage_.get());
    EXPECT_TRUE(observer_->observed_old_storage_->storage() != storage());
    EXPECT_FALSE(PathExists(
        temp_directory_.path().AppendASCII("Cache").AppendASCII("index")));
    EXPECT_FALSE(PathExists(
        temp_directory_.path().AppendASCII("Index")));

    // Verify that the hosts saw appropriate events.
    if (test_case == 1) {
      EXPECT_TRUE(frontend_.error_event_was_raised_);
      AppCacheHost* host1 = backend_->GetHost(1);
      EXPECT_FALSE(host1->associated_cache());
      EXPECT_FALSE(host1->group_being_updated_);
      EXPECT_TRUE(host1->disabled_storage_reference_.get());
    } else {
      ASSERT_EQ(2, test_case);
      AppCacheHost* host2 = backend_->GetHost(2);
      EXPECT_EQ(1, host2->main_resource_cache_->cache_id());
      EXPECT_TRUE(host2->disabled_storage_reference_.get());
    }

    // Cleanup and claim victory.
    service_->RemoveObserver(observer_.get());
    request_.reset();
    backend_.reset();
    observer_.reset();
    TestFinished();
  }

  // Test case helpers --------------------------------------------------

  AppCacheService* service() {
    return service_.get();
  }

  AppCacheStorageImpl* storage() {
    return static_cast<AppCacheStorageImpl*>(service()->storage());
  }

  AppCacheDatabase* database() {
    return storage()->database_;
  }

  MockStorageDelegate* delegate() {
    return delegate_.get();
  }

  void MakeCacheAndGroup(
      const GURL& manifest_url, int64 group_id, int64 cache_id,
      bool add_to_database) {
    AppCacheEntry default_entry(
        AppCacheEntry::EXPLICIT, cache_id + kDefaultEntryIdOffset,
        kDefaultEntrySize);
    group_ = new AppCacheGroup(storage(), manifest_url, group_id);
    cache_ = new AppCache(storage(), cache_id);
    cache_->AddEntry(kDefaultEntryUrl, default_entry);
    cache_->set_complete(true);
    group_->AddCache(cache_.get());
    if (add_to_database) {
      AppCacheDatabase::GroupRecord group_record;
      group_record.group_id = group_id;
      group_record.manifest_url = manifest_url;
      group_record.origin = manifest_url.GetOrigin();
      EXPECT_TRUE(database()->InsertGroup(&group_record));
      AppCacheDatabase::CacheRecord cache_record;
      cache_record.cache_id = cache_id;
      cache_record.group_id = group_id;
      cache_record.online_wildcard = false;
      cache_record.update_time = kZeroTime;
      cache_record.cache_size = kDefaultEntrySize;
      EXPECT_TRUE(database()->InsertCache(&cache_record));
      AppCacheDatabase::EntryRecord entry_record;
      entry_record.cache_id = cache_id;
      entry_record.url = kDefaultEntryUrl;
      entry_record.flags = default_entry.types();
      entry_record.response_id = default_entry.response_id();
      entry_record.response_size = default_entry.response_size();
      EXPECT_TRUE(database()->InsertEntry(&entry_record));

      storage()->usage_map_[manifest_url.GetOrigin()] =
          default_entry.response_size();
    }
  }

  // Data members --------------------------------------------------

  scoped_ptr<base::WaitableEvent> test_finished_event_;
  std::stack<base::Closure> task_stack_;
  scoped_ptr<AppCacheService> service_;
  scoped_ptr<MockStorageDelegate> delegate_;
  scoped_refptr<MockQuotaManagerProxy> mock_quota_manager_proxy_;
  scoped_refptr<AppCacheGroup> group_;
  scoped_refptr<AppCache> cache_;
  scoped_refptr<AppCache> cache2_;

  // Specifically for the Reinitalize test.
  base::ScopedTempDir temp_directory_;
  scoped_ptr<MockServiceObserver> observer_;
  MockAppCacheFrontend frontend_;
  scoped_ptr<AppCacheBackendImpl> backend_;
  scoped_ptr<net::URLRequest> request_;
};


TEST_F(AppCacheStorageImplTest, LoadCache_Miss) {
  RunTestOnIOThread(&AppCacheStorageImplTest::LoadCache_Miss);
}

TEST_F(AppCacheStorageImplTest, LoadCache_NearHit) {
  RunTestOnIOThread(&AppCacheStorageImplTest::LoadCache_NearHit);
}

TEST_F(AppCacheStorageImplTest, CreateGroupInEmptyOrigin) {
  RunTestOnIOThread(&AppCacheStorageImplTest::CreateGroupInEmptyOrigin);
}

TEST_F(AppCacheStorageImplTest, CreateGroupInPopulatedOrigin) {
  RunTestOnIOThread(&AppCacheStorageImplTest::CreateGroupInPopulatedOrigin);
}

TEST_F(AppCacheStorageImplTest, LoadGroupAndCache_FarHit) {
  RunTestOnIOThread(&AppCacheStorageImplTest::LoadGroupAndCache_FarHit);
}

TEST_F(AppCacheStorageImplTest, StoreNewGroup) {
  RunTestOnIOThread(&AppCacheStorageImplTest::StoreNewGroup);
}

TEST_F(AppCacheStorageImplTest, StoreExistingGroup) {
  RunTestOnIOThread(&AppCacheStorageImplTest::StoreExistingGroup);
}

TEST_F(AppCacheStorageImplTest, StoreExistingGroupExistingCache) {
  RunTestOnIOThread(&AppCacheStorageImplTest::StoreExistingGroupExistingCache);
}

TEST_F(AppCacheStorageImplTest, FailStoreGroup) {
  RunTestOnIOThread(&AppCacheStorageImplTest::FailStoreGroup);
}

TEST_F(AppCacheStorageImplTest, MakeGroupObsolete) {
  RunTestOnIOThread(&AppCacheStorageImplTest::MakeGroupObsolete);
}

TEST_F(AppCacheStorageImplTest, MarkEntryAsForeign) {
  RunTestOnIOThread(&AppCacheStorageImplTest::MarkEntryAsForeign);
}

TEST_F(AppCacheStorageImplTest, MarkEntryAsForeignWithLoadInProgress) {
  RunTestOnIOThread(
      &AppCacheStorageImplTest::MarkEntryAsForeignWithLoadInProgress);
}

TEST_F(AppCacheStorageImplTest, FindNoMainResponse) {
  RunTestOnIOThread(&AppCacheStorageImplTest::FindNoMainResponse);
}

TEST_F(AppCacheStorageImplTest, BasicFindMainResponseInDatabase) {
  RunTestOnIOThread(
      &AppCacheStorageImplTest::BasicFindMainResponseInDatabase);
}

TEST_F(AppCacheStorageImplTest, BasicFindMainResponseInWorkingSet) {
  RunTestOnIOThread(
      &AppCacheStorageImplTest::BasicFindMainResponseInWorkingSet);
}

TEST_F(AppCacheStorageImplTest, BasicFindMainFallbackResponseInDatabase) {
  RunTestOnIOThread(
      &AppCacheStorageImplTest::BasicFindMainFallbackResponseInDatabase);
}

TEST_F(AppCacheStorageImplTest, BasicFindMainFallbackResponseInWorkingSet) {
  RunTestOnIOThread(
      &AppCacheStorageImplTest::BasicFindMainFallbackResponseInWorkingSet);
}

TEST_F(AppCacheStorageImplTest, BasicFindMainInterceptResponseInDatabase) {
  RunTestOnIOThread(
      &AppCacheStorageImplTest::BasicFindMainInterceptResponseInDatabase);
}

TEST_F(AppCacheStorageImplTest, BasicFindMainInterceptResponseInWorkingSet) {
  RunTestOnIOThread(
      &AppCacheStorageImplTest::BasicFindMainInterceptResponseInWorkingSet);
}

TEST_F(AppCacheStorageImplTest, FindMainResponseWithMultipleHits) {
  RunTestOnIOThread(
      &AppCacheStorageImplTest::FindMainResponseWithMultipleHits);
}

TEST_F(AppCacheStorageImplTest, FindMainResponseExclusionsInDatabase) {
  RunTestOnIOThread(
      &AppCacheStorageImplTest::FindMainResponseExclusionsInDatabase);
}

TEST_F(AppCacheStorageImplTest, FindMainResponseExclusionsInWorkingSet) {
  RunTestOnIOThread(
      &AppCacheStorageImplTest::FindMainResponseExclusionsInWorkingSet);
}

TEST_F(AppCacheStorageImplTest, FindInterceptPatternMatchInWorkingSet) {
  RunTestOnIOThread(
      &AppCacheStorageImplTest::FindInterceptPatternMatchInWorkingSet);
}

TEST_F(AppCacheStorageImplTest, FindInterceptPatternMatchInDatabase) {
  RunTestOnIOThread(
      &AppCacheStorageImplTest::FindInterceptPatternMatchInDatabase);
}

TEST_F(AppCacheStorageImplTest, FindFallbackPatternMatchInWorkingSet) {
  RunTestOnIOThread(
      &AppCacheStorageImplTest::FindFallbackPatternMatchInWorkingSet);
}

TEST_F(AppCacheStorageImplTest, FindFallbackPatternMatchInDatabase) {
  RunTestOnIOThread(
      &AppCacheStorageImplTest::FindFallbackPatternMatchInDatabase);
}

TEST_F(AppCacheStorageImplTest, Reinitialize1) {
  RunTestOnIOThread(&AppCacheStorageImplTest::Reinitialize1);
}

TEST_F(AppCacheStorageImplTest, Reinitialize2) {
  RunTestOnIOThread(&AppCacheStorageImplTest::Reinitialize2);
}

// That's all folks!

}  // namespace appcache