src/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/message_loop/message_loop.h"
  13 #include "base/threading/thread.h"
  14 #include "components/sync_driver/data_type_error_handler_mock.h"
  15 #include "components/sync_driver/generic_change_processor.h"
  16 #include "components/sync_driver/generic_change_processor_factory.h"
  17 #include "components/sync_driver/sync_api_component_factory.h"
  18 #include "sync/api/fake_syncable_service.h"
  19 #include "sync/internal_api/public/attachments/attachment_service_impl.h"
  20 #include "testing/gmock/include/gmock/gmock.h"
  21 #include "testing/gtest/include/gtest/gtest.h"
  22
  23 namespace sync_driver {
  24
  25 namespace {
  26
  27 using ::testing::NiceMock;
  28 using ::testing::StrictMock;
  29
  30 class SyncSharedChangeProcessorTest :
  31     public testing::Test,
  32     public SyncApiComponentFactory {
  33  public:
  34   SyncSharedChangeProcessorTest() : backend_thread_("dbthread"),
  35                                     did_connect_(false) {}
  36
  37   virtual ~SyncSharedChangeProcessorTest() {
  38     EXPECT_FALSE(db_syncable_service_.get());
  39   }
  40
  41   virtual base::WeakPtr<syncer::SyncableService> GetSyncableServiceForType(
  42       syncer::ModelType type) OVERRIDE {
  43     return db_syncable_service_->AsWeakPtr();
  44   }
  45
  46   virtual scoped_ptr<syncer::AttachmentService> CreateAttachmentService(
  47       const syncer::UserShare& user_share,
  48       syncer::AttachmentService::Delegate* delegate) OVERRIDE {
  49     return syncer::AttachmentServiceImpl::CreateForTest();
  50   }
  51
  52  protected:
  53   virtual void SetUp() OVERRIDE {
  54     shared_change_processor_ = new SharedChangeProcessor();
  55     ASSERT_TRUE(backend_thread_.Start());
  56     ASSERT_TRUE(backend_thread_.message_loop_proxy()->PostTask(
  57         FROM_HERE,
  58         base::Bind(&SyncSharedChangeProcessorTest::SetUpDBSyncableService,
  59                    base::Unretained(this))));
  60   }
  61
  62   virtual void TearDown() OVERRIDE {
  63     EXPECT_TRUE(backend_thread_.message_loop_proxy()->PostTask(
  64         FROM_HERE,
  65         base::Bind(&SyncSharedChangeProcessorTest::TearDownDBSyncableService,
  66                    base::Unretained(this))));
  67     // This must happen before the DB thread is stopped since
  68     // |shared_change_processor_| may post tasks to delete its members
  69     // on the correct thread.
  70     //
  71     // TODO(akalin): Write deterministic tests for the destruction of
  72     // |shared_change_processor_| on the UI and DB threads.
  73     shared_change_processor_ = NULL;
  74     backend_thread_.Stop();
  75
  76     // Note: Stop() joins the threads, and that barrier prevents this read
  77     // from being moved (e.g by compiler optimization) in such a way that it
  78     // would race with the write in ConnectOnDBThread (because by this time,
  79     // everything that could have run on |backend_thread_| has done so).
  80     ASSERT_TRUE(did_connect_);
  81   }
  82
  83   // Connect |shared_change_processor_| on the DB thread.
  84   void Connect() {
  85     EXPECT_TRUE(backend_thread_.message_loop_proxy()->PostTask(
  86         FROM_HERE,
  87         base::Bind(&SyncSharedChangeProcessorTest::ConnectOnDBThread,
  88                    base::Unretained(this),
  89                    shared_change_processor_)));
  90   }
  91
  92  private:
  93   // Used by SetUp().
  94   void SetUpDBSyncableService() {
  95     DCHECK(backend_thread_.message_loop_proxy()->BelongsToCurrentThread());
  96     DCHECK(!db_syncable_service_.get());
  97     db_syncable_service_.reset(new syncer::FakeSyncableService());
  98   }
  99
 100   // Used by TearDown().
 101   void TearDownDBSyncableService() {
 102     DCHECK(backend_thread_.message_loop_proxy()->BelongsToCurrentThread());
 103     DCHECK(db_syncable_service_.get());
 104     db_syncable_service_.reset();
 105   }
 106
 107   // Used by Connect().  The SharedChangeProcessor is passed in
 108   // because we modify |shared_change_processor_| on the main thread
 109   // (in TearDown()).
 110   void ConnectOnDBThread(
 111       const scoped_refptr<SharedChangeProcessor>& shared_change_processor) {
 112     DCHECK(backend_thread_.message_loop_proxy()->BelongsToCurrentThread());
 113     syncer::UserShare share;
 114     EXPECT_TRUE(shared_change_processor->Connect(
 115         this,
 116         &processor_factory_,
 117         &share,
 118         &error_handler_,
 119         syncer::AUTOFILL,
 120         base::WeakPtr<syncer::SyncMergeResult>()));
 121     did_connect_ = true;
 122   }
 123
 124   base::MessageLoop frontend_loop_;
 125   base::Thread backend_thread_;
 126
 127   scoped_refptr<SharedChangeProcessor> shared_change_processor_;
 128   StrictMock<DataTypeErrorHandlerMock> error_handler_;
 129
 130   GenericChangeProcessorFactory processor_factory_;
 131   bool did_connect_;
 132
 133   // Used only on DB thread.
 134   scoped_ptr<syncer::FakeSyncableService> db_syncable_service_;
 135 };
 136
 137 // Simply connect the shared change processor.  It should succeed, and
 138 // nothing further should happen.
 139 TEST_F(SyncSharedChangeProcessorTest, Basic) {
 140   Connect();
 141 }
 142
 143 }  // namespace
 144
 145 }  // namespace sync_driver