components/sync_driver/shared_change_processor_unittest.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "components/sync_driver/shared_change_processor.h"
   6
   7 #include <cstddef>
   8
   9 #include "base/bind.h"
  10 #include "base/bind_helpers.h"
  11 #include "base/compiler_specific.h"
  12 #include "base/location.h"
  13 #include "base/single_thread_task_runner.h"
  14 #include "base/synchronization/waitable_event.h"
  15 #include "base/threading/thread.h"
  16 #include "components/sync_driver/data_type_error_handler_mock.h"
  17 #include "components/sync_driver/generic_change_processor.h"
  18 #include "components/sync_driver/generic_change_processor_factory.h"
  19 #include "components/sync_driver/sync_api_component_factory.h"
  20 #include "sync/api/attachments/attachment_id.h"
  21 #include "sync/api/attachments/attachment_store.h"
  22 #include "sync/api/fake_syncable_service.h"
  23 #include "sync/internal_api/public/attachments/attachment_service_impl.h"
  24 #include "sync/internal_api/public/base/model_type.h"
  25 #include "sync/internal_api/public/test/test_user_share.h"
  26 #include "testing/gmock/include/gmock/gmock.h"
  27 #include "testing/gtest/include/gtest/gtest.h"
  28
  29 namespace sync_driver {
  30
  31 namespace {
  32
  33 using ::testing::NiceMock;
  34 using ::testing::StrictMock;
  35
  36 class SyncSharedChangeProcessorTest :
  37     public testing::Test,
  38     public SyncApiComponentFactory {
  39  public:
  40   SyncSharedChangeProcessorTest()
  41       : backend_thread_("dbthread"),
  42         did_connect_(false),
  43         has_attachment_service_(false) {}
  44
  45   ~SyncSharedChangeProcessorTest() override {
  46     EXPECT_FALSE(db_syncable_service_.get());
  47   }
  48
  49   base::WeakPtr<syncer::SyncableService> GetSyncableServiceForType(
  50       syncer::ModelType type) override {
  51     return db_syncable_service_->AsWeakPtr();
  52   }
  53
  54   scoped_ptr<syncer::AttachmentService> CreateAttachmentService(
  55       scoped_ptr<syncer::AttachmentStoreForSync> attachment_store,
  56       const syncer::UserShare& user_share,
  57       const std::string& store_birthday,
  58       syncer::ModelType model_type,
  59       syncer::AttachmentService::Delegate* delegate) override {
  60     return syncer::AttachmentServiceImpl::CreateForTest();
  61   }
  62
  63  protected:
  64   void SetUp() override {
  65     test_user_share_.SetUp();
  66     shared_change_processor_ = new SharedChangeProcessor();
  67     ASSERT_TRUE(backend_thread_.Start());
  68     ASSERT_TRUE(backend_thread_.task_runner()->PostTask(
  69         FROM_HERE,
  70         base::Bind(&SyncSharedChangeProcessorTest::SetUpDBSyncableService,
  71                    base::Unretained(this))));
  72   }
  73
  74   void TearDown() override {
  75     EXPECT_TRUE(backend_thread_.task_runner()->PostTask(
  76         FROM_HERE,
  77         base::Bind(&SyncSharedChangeProcessorTest::TearDownDBSyncableService,
  78                    base::Unretained(this))));
  79     // This must happen before the DB thread is stopped since
  80     // |shared_change_processor_| may post tasks to delete its members
  81     // on the correct thread.
  82     //
  83     // TODO(akalin): Write deterministic tests for the destruction of
  84     // |shared_change_processor_| on the UI and DB threads.
  85     shared_change_processor_ = NULL;
  86     backend_thread_.Stop();
  87
  88     // Note: Stop() joins the threads, and that barrier prevents this read
  89     // from being moved (e.g by compiler optimization) in such a way that it
  90     // would race with the write in ConnectOnDBThread (because by this time,
  91     // everything that could have run on |backend_thread_| has done so).
  92     ASSERT_TRUE(did_connect_);
  93     test_user_share_.TearDown();
  94   }
  95
  96   // Connect |shared_change_processor_| on the DB thread.
  97   void Connect() {
  98     EXPECT_TRUE(backend_thread_.task_runner()->PostTask(
  99         FROM_HERE,
 100         base::Bind(&SyncSharedChangeProcessorTest::ConnectOnDBThread,
 101                    base::Unretained(this), shared_change_processor_)));
 102   }
 103
 104   void SetAttachmentStore() {
 105     EXPECT_TRUE(backend_thread_.task_runner()->PostTask(
 106         FROM_HERE,
 107         base::Bind(&SyncSharedChangeProcessorTest::SetAttachmentStoreOnDBThread,
 108                    base::Unretained(this))));
 109   }
 110
 111   bool HasAttachmentService() {
 112     base::WaitableEvent event(false, false);
 113     EXPECT_TRUE(backend_thread_.task_runner()->PostTask(
 114         FROM_HERE,
 115         base::Bind(
 116             &SyncSharedChangeProcessorTest::CheckAttachmentServiceOnDBThread,
 117             base::Unretained(this), base::Unretained(&event))));
 118     event.Wait();
 119     return has_attachment_service_;
 120   }
 121
 122  private:
 123   // Used by SetUp().
 124   void SetUpDBSyncableService() {
 125     DCHECK(backend_thread_.task_runner()->BelongsToCurrentThread());
 126     DCHECK(!db_syncable_service_.get());
 127     db_syncable_service_.reset(new syncer::FakeSyncableService());
 128   }
 129
 130   // Used by TearDown().
 131   void TearDownDBSyncableService() {
 132     DCHECK(backend_thread_.task_runner()->BelongsToCurrentThread());
 133     DCHECK(db_syncable_service_.get());
 134     db_syncable_service_.reset();
 135   }
 136
 137   void SetAttachmentStoreOnDBThread() {
 138     DCHECK(backend_thread_.task_runner()->BelongsToCurrentThread());
 139     DCHECK(db_syncable_service_.get());
 140     db_syncable_service_->set_attachment_store(
 141         syncer::AttachmentStore::CreateInMemoryStore());
 142   }
 143
 144   // Used by Connect().  The SharedChangeProcessor is passed in
 145   // because we modify |shared_change_processor_| on the main thread
 146   // (in TearDown()).
 147   void ConnectOnDBThread(
 148       const scoped_refptr<SharedChangeProcessor>& shared_change_processor) {
 149     DCHECK(backend_thread_.task_runner()->BelongsToCurrentThread());
 150     EXPECT_TRUE(shared_change_processor->Connect(
 151         this, &processor_factory_, test_user_share_.user_share(),
 152         &error_handler_, syncer::AUTOFILL,
 153         base::WeakPtr<syncer::SyncMergeResult>()));
 154     did_connect_ = true;
 155   }
 156
 157   void CheckAttachmentServiceOnDBThread(base::WaitableEvent* event) {
 158     DCHECK(backend_thread_.task_runner()->BelongsToCurrentThread());
 159     DCHECK(db_syncable_service_.get());
 160     has_attachment_service_ = !!db_syncable_service_->attachment_service();
 161     event->Signal();
 162   }
 163
 164   base::MessageLoop frontend_loop_;
 165   base::Thread backend_thread_;
 166   syncer::TestUserShare test_user_share_;
 167
 168   scoped_refptr<SharedChangeProcessor> shared_change_processor_;
 169   StrictMock<DataTypeErrorHandlerMock> error_handler_;
 170
 171   GenericChangeProcessorFactory processor_factory_;
 172   bool did_connect_;
 173   bool has_attachment_service_;
 174
 175   // Used only on DB thread.
 176   scoped_ptr<syncer::FakeSyncableService> db_syncable_service_;
 177 };
 178
 179 // Simply connect the shared change processor.  It should succeed, and
 180 // nothing further should happen.
 181 TEST_F(SyncSharedChangeProcessorTest, Basic) {
 182   Connect();
 183 }
 184
 185 // Connect the shared change processor to a syncable service with
 186 // AttachmentStore. Verify that shared change processor implementation
 187 // creates AttachmentService and passes it back to the syncable service.
 188 TEST_F(SyncSharedChangeProcessorTest, ConnectWithAttachmentStore) {
 189   SetAttachmentStore();
 190   Connect();
 191   EXPECT_TRUE(HasAttachmentService());
 192 }
 193
 194 }  // namespace
 195
 196 }  // namespace sync_driver