src/sync/engine/get_updates_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 "sync/engine/get_updates_processor.h"
   6
   7 #include "base/message_loop/message_loop.h"
   8 #include "base/stl_util.h"
   9 #include "sync/engine/get_updates_delegate.h"
  10 #include "sync/engine/update_handler.h"
  11 #include "sync/internal_api/public/base/model_type_test_util.h"
  12 #include "sync/protocol/sync.pb.h"
  13 #include "sync/sessions/debug_info_getter.h"
  14 #include "sync/sessions/nudge_tracker.h"
  15 #include "sync/sessions/status_controller.h"
  16 #include "sync/test/engine/fake_model_worker.h"
  17 #include "sync/test/engine/mock_update_handler.h"
  18 #include "sync/test/mock_invalidation.h"
  19 #include "sync/test/sessions/mock_debug_info_getter.h"
  20 #include "testing/gtest/include/gtest/gtest.h"
  21
  22 namespace syncer {
  23
  24 namespace {
  25
  26 scoped_ptr<InvalidationInterface> BuildInvalidation(
  27     int64 version,
  28     const std::string& payload) {
  29   return MockInvalidation::Build(version, payload)
  30       .PassAs<InvalidationInterface>();
  31 }
  32
  33 }  // namespace
  34
  35 using sessions::MockDebugInfoGetter;
  36
  37 // A test fixture for tests exercising download updates functions.
  38 class GetUpdatesProcessorTest : public ::testing::Test {
  39  protected:
  40   GetUpdatesProcessorTest() :
  41     kTestStartTime(base::TimeTicks::Now()),
  42     update_handler_deleter_(&update_handler_map_) {}
  43
  44   virtual void SetUp() {
  45     AddUpdateHandler(AUTOFILL);
  46     AddUpdateHandler(BOOKMARKS);
  47     AddUpdateHandler(PREFERENCES);
  48   }
  49
  50   ModelTypeSet enabled_types() {
  51     return enabled_types_;
  52   }
  53
  54   scoped_ptr<GetUpdatesProcessor> BuildGetUpdatesProcessor(
  55       const GetUpdatesDelegate& delegate) {
  56     return scoped_ptr<GetUpdatesProcessor>(
  57         new GetUpdatesProcessor(&update_handler_map_, delegate));
  58   }
  59
  60   void InitFakeUpdateResponse(sync_pb::GetUpdatesResponse* response) {
  61     ModelTypeSet types = enabled_types();
  62
  63     for (ModelTypeSet::Iterator it = types.First(); it.Good(); it.Inc()) {
  64       sync_pb::DataTypeProgressMarker* marker =
  65           response->add_new_progress_marker();
  66       marker->set_data_type_id(GetSpecificsFieldNumberFromModelType(it.Get()));
  67       marker->set_token("foobarbaz");
  68       sync_pb::DataTypeContext* context = response->add_context_mutations();
  69       context->set_data_type_id(GetSpecificsFieldNumberFromModelType(it.Get()));
  70       context->set_version(1);
  71       context->set_context("context");
  72     }
  73
  74     response->set_changes_remaining(0);
  75   }
  76
  77   const UpdateHandler* GetHandler(ModelType type) {
  78     UpdateHandlerMap::iterator it = update_handler_map_.find(type);
  79     if (it == update_handler_map_.end())
  80       return NULL;
  81     return it->second;
  82   }
  83
  84   const base::TimeTicks kTestStartTime;
  85
  86  protected:
  87   MockUpdateHandler* AddUpdateHandler(ModelType type) {
  88     enabled_types_.Put(type);
  89
  90     MockUpdateHandler* handler = new MockUpdateHandler(type);
  91     update_handler_map_.insert(std::make_pair(type, handler));
  92
  93     return handler;
  94   }
  95
  96  private:
  97   ModelTypeSet enabled_types_;
  98   UpdateHandlerMap update_handler_map_;
  99   STLValueDeleter<UpdateHandlerMap> update_handler_deleter_;
 100   scoped_ptr<GetUpdatesProcessor> get_updates_processor_;
 101
 102   DISALLOW_COPY_AND_ASSIGN(GetUpdatesProcessorTest);
 103 };
 104
 105 // Basic test to make sure nudges are expressed properly in the request.
 106 TEST_F(GetUpdatesProcessorTest, BookmarkNudge) {
 107   sessions::NudgeTracker nudge_tracker;
 108   nudge_tracker.RecordLocalChange(ModelTypeSet(BOOKMARKS));
 109
 110   sync_pb::ClientToServerMessage message;
 111   NormalGetUpdatesDelegate normal_delegate(nudge_tracker);
 112   scoped_ptr<GetUpdatesProcessor> processor(
 113       BuildGetUpdatesProcessor(normal_delegate));
 114   processor->PrepareGetUpdates(enabled_types(), &message);
 115
 116   const sync_pb::GetUpdatesMessage& gu_msg = message.get_updates();
 117   EXPECT_EQ(sync_pb::GetUpdatesCallerInfo::LOCAL,
 118             gu_msg.caller_info().source());
 119   EXPECT_EQ(sync_pb::SyncEnums::GU_TRIGGER, gu_msg.get_updates_origin());
 120   for (int i = 0; i < gu_msg.from_progress_marker_size(); ++i) {
 121     syncer::ModelType type = GetModelTypeFromSpecificsFieldNumber(
 122         gu_msg.from_progress_marker(i).data_type_id());
 123
 124     const sync_pb::DataTypeProgressMarker& progress_marker =
 125         gu_msg.from_progress_marker(i);
 126     const sync_pb::GetUpdateTriggers& gu_trigger =
 127         progress_marker.get_update_triggers();
 128
 129     // We perform some basic tests of GU trigger and source fields here.  The
 130     // more complicated scenarios are tested by the NudgeTracker tests.
 131     if (type == BOOKMARKS) {
 132       EXPECT_TRUE(progress_marker.has_notification_hint());
 133       EXPECT_EQ("", progress_marker.notification_hint());
 134       EXPECT_EQ(1, gu_trigger.local_modification_nudges());
 135       EXPECT_EQ(0, gu_trigger.datatype_refresh_nudges());
 136     } else {
 137       EXPECT_FALSE(progress_marker.has_notification_hint());
 138       EXPECT_EQ(0, gu_trigger.local_modification_nudges());
 139       EXPECT_EQ(0, gu_trigger.datatype_refresh_nudges());
 140     }
 141   }
 142 }
 143
 144 // Basic test to ensure invalidation payloads are expressed in the request.
 145 TEST_F(GetUpdatesProcessorTest, NotifyMany) {
 146   sessions::NudgeTracker nudge_tracker;
 147   nudge_tracker.RecordRemoteInvalidation(
 148       AUTOFILL, BuildInvalidation(1, "autofill_payload"));
 149   nudge_tracker.RecordRemoteInvalidation(
 150       BOOKMARKS, BuildInvalidation(1, "bookmark_payload"));
 151   nudge_tracker.RecordRemoteInvalidation(
 152       PREFERENCES, BuildInvalidation(1, "preferences_payload"));
 153   ModelTypeSet notified_types;
 154   notified_types.Put(AUTOFILL);
 155   notified_types.Put(BOOKMARKS);
 156   notified_types.Put(PREFERENCES);
 157
 158   sync_pb::ClientToServerMessage message;
 159   NormalGetUpdatesDelegate normal_delegate(nudge_tracker);
 160   scoped_ptr<GetUpdatesProcessor> processor(
 161       BuildGetUpdatesProcessor(normal_delegate));
 162   processor->PrepareGetUpdates(enabled_types(), &message);
 163
 164   const sync_pb::GetUpdatesMessage& gu_msg = message.get_updates();
 165   EXPECT_EQ(sync_pb::GetUpdatesCallerInfo::NOTIFICATION,
 166             gu_msg.caller_info().source());
 167   EXPECT_EQ(sync_pb::SyncEnums::GU_TRIGGER, gu_msg.get_updates_origin());
 168   for (int i = 0; i < gu_msg.from_progress_marker_size(); ++i) {
 169     syncer::ModelType type = GetModelTypeFromSpecificsFieldNumber(
 170         gu_msg.from_progress_marker(i).data_type_id());
 171
 172     const sync_pb::DataTypeProgressMarker& progress_marker =
 173         gu_msg.from_progress_marker(i);
 174     const sync_pb::GetUpdateTriggers& gu_trigger =
 175         progress_marker.get_update_triggers();
 176
 177     // We perform some basic tests of GU trigger and source fields here.  The
 178     // more complicated scenarios are tested by the NudgeTracker tests.
 179     if (notified_types.Has(type)) {
 180       EXPECT_TRUE(progress_marker.has_notification_hint());
 181       EXPECT_FALSE(progress_marker.notification_hint().empty());
 182       EXPECT_EQ(1, gu_trigger.notification_hint_size());
 183     } else {
 184       EXPECT_FALSE(progress_marker.has_notification_hint());
 185       EXPECT_EQ(0, gu_trigger.notification_hint_size());
 186     }
 187   }
 188 }
 189
 190 // Basic test to ensure initial sync requests are expressed in the request.
 191 TEST_F(GetUpdatesProcessorTest, InitialSyncRequest) {
 192   sessions::NudgeTracker nudge_tracker;
 193   nudge_tracker.RecordInitialSyncRequired(AUTOFILL);
 194   nudge_tracker.RecordInitialSyncRequired(PREFERENCES);
 195
 196   ModelTypeSet initial_sync_types = ModelTypeSet(AUTOFILL, PREFERENCES);
 197
 198   sync_pb::ClientToServerMessage message;
 199   NormalGetUpdatesDelegate normal_delegate(nudge_tracker);
 200   scoped_ptr<GetUpdatesProcessor> processor(
 201       BuildGetUpdatesProcessor(normal_delegate));
 202   processor->PrepareGetUpdates(enabled_types(), &message);
 203
 204   const sync_pb::GetUpdatesMessage& gu_msg = message.get_updates();
 205   EXPECT_EQ(sync_pb::GetUpdatesCallerInfo::DATATYPE_REFRESH,
 206             gu_msg.caller_info().source());
 207   EXPECT_EQ(sync_pb::SyncEnums::GU_TRIGGER, gu_msg.get_updates_origin());
 208   for (int i = 0; i < gu_msg.from_progress_marker_size(); ++i) {
 209     syncer::ModelType type = GetModelTypeFromSpecificsFieldNumber(
 210         gu_msg.from_progress_marker(i).data_type_id());
 211
 212     const sync_pb::DataTypeProgressMarker& progress_marker =
 213         gu_msg.from_progress_marker(i);
 214     const sync_pb::GetUpdateTriggers& gu_trigger =
 215         progress_marker.get_update_triggers();
 216
 217     // We perform some basic tests of GU trigger and source fields here.  The
 218     // more complicated scenarios are tested by the NudgeTracker tests.
 219     if (initial_sync_types.Has(type)) {
 220       EXPECT_TRUE(gu_trigger.initial_sync_in_progress());
 221     } else {
 222       EXPECT_TRUE(gu_trigger.has_initial_sync_in_progress());
 223       EXPECT_FALSE(gu_trigger.initial_sync_in_progress());
 224     }
 225   }
 226 }
 227
 228 TEST_F(GetUpdatesProcessorTest, ConfigureTest) {
 229   sync_pb::ClientToServerMessage message;
 230   ConfigureGetUpdatesDelegate configure_delegate(
 231       sync_pb::GetUpdatesCallerInfo::RECONFIGURATION);
 232   scoped_ptr<GetUpdatesProcessor> processor(
 233       BuildGetUpdatesProcessor(configure_delegate));
 234   processor->PrepareGetUpdates(enabled_types(), &message);
 235
 236   const sync_pb::GetUpdatesMessage& gu_msg = message.get_updates();
 237   EXPECT_EQ(sync_pb::SyncEnums::RECONFIGURATION, gu_msg.get_updates_origin());
 238   EXPECT_EQ(sync_pb::GetUpdatesCallerInfo::RECONFIGURATION,
 239             gu_msg.caller_info().source());
 240
 241   ModelTypeSet progress_types;
 242   for (int i = 0; i < gu_msg.from_progress_marker_size(); ++i) {
 243     syncer::ModelType type = GetModelTypeFromSpecificsFieldNumber(
 244         gu_msg.from_progress_marker(i).data_type_id());
 245     progress_types.Put(type);
 246   }
 247   EXPECT_TRUE(enabled_types().Equals(progress_types));
 248 }
 249
 250 TEST_F(GetUpdatesProcessorTest, PollTest) {
 251   sync_pb::ClientToServerMessage message;
 252   PollGetUpdatesDelegate poll_delegate;
 253   scoped_ptr<GetUpdatesProcessor> processor(
 254       BuildGetUpdatesProcessor(poll_delegate));
 255   processor->PrepareGetUpdates(enabled_types(), &message);
 256
 257   const sync_pb::GetUpdatesMessage& gu_msg = message.get_updates();
 258   EXPECT_EQ(sync_pb::SyncEnums::PERIODIC, gu_msg.get_updates_origin());
 259   EXPECT_EQ(sync_pb::GetUpdatesCallerInfo::PERIODIC,
 260             gu_msg.caller_info().source());
 261
 262   ModelTypeSet progress_types;
 263   for (int i = 0; i < gu_msg.from_progress_marker_size(); ++i) {
 264     syncer::ModelType type = GetModelTypeFromSpecificsFieldNumber(
 265         gu_msg.from_progress_marker(i).data_type_id());
 266     progress_types.Put(type);
 267   }
 268   EXPECT_TRUE(enabled_types().Equals(progress_types));
 269 }
 270
 271 TEST_F(GetUpdatesProcessorTest, RetryTest) {
 272   sessions::NudgeTracker nudge_tracker;
 273
 274   // Schedule a retry.
 275   base::TimeTicks t1 = kTestStartTime;
 276   nudge_tracker.SetNextRetryTime(t1);
 277
 278   // Get the nudge tracker to think the retry is due.
 279   nudge_tracker.SetSyncCycleStartTime(t1 + base::TimeDelta::FromSeconds(1));
 280
 281   sync_pb::ClientToServerMessage message;
 282   NormalGetUpdatesDelegate normal_delegate(nudge_tracker);
 283   scoped_ptr<GetUpdatesProcessor> processor(
 284       BuildGetUpdatesProcessor(normal_delegate));
 285   processor->PrepareGetUpdates(enabled_types(), &message);
 286
 287   const sync_pb::GetUpdatesMessage& gu_msg = message.get_updates();
 288   EXPECT_EQ(sync_pb::SyncEnums::RETRY, gu_msg.get_updates_origin());
 289   EXPECT_EQ(sync_pb::GetUpdatesCallerInfo::RETRY,
 290             gu_msg.caller_info().source());
 291   EXPECT_TRUE(gu_msg.is_retry());
 292
 293   ModelTypeSet progress_types;
 294   for (int i = 0; i < gu_msg.from_progress_marker_size(); ++i) {
 295     syncer::ModelType type = GetModelTypeFromSpecificsFieldNumber(
 296         gu_msg.from_progress_marker(i).data_type_id());
 297     progress_types.Put(type);
 298   }
 299   EXPECT_TRUE(enabled_types().Equals(progress_types));
 300 }
 301
 302 TEST_F(GetUpdatesProcessorTest, NudgeWithRetryTest) {
 303   sessions::NudgeTracker nudge_tracker;
 304
 305   // Schedule a retry.
 306   base::TimeTicks t1 = kTestStartTime;
 307   nudge_tracker.SetNextRetryTime(t1);
 308
 309   // Get the nudge tracker to think the retry is due.
 310   nudge_tracker.SetSyncCycleStartTime(t1 + base::TimeDelta::FromSeconds(1));
 311
 312   // Record a local change, too.
 313   nudge_tracker.RecordLocalChange(ModelTypeSet(BOOKMARKS));
 314
 315   sync_pb::ClientToServerMessage message;
 316   NormalGetUpdatesDelegate normal_delegate(nudge_tracker);
 317   scoped_ptr<GetUpdatesProcessor> processor(
 318       BuildGetUpdatesProcessor(normal_delegate));
 319   processor->PrepareGetUpdates(enabled_types(), &message);
 320
 321   const sync_pb::GetUpdatesMessage& gu_msg = message.get_updates();
 322   EXPECT_NE(sync_pb::SyncEnums::RETRY, gu_msg.get_updates_origin());
 323   EXPECT_NE(sync_pb::GetUpdatesCallerInfo::RETRY,
 324             gu_msg.caller_info().source());
 325
 326   EXPECT_TRUE(gu_msg.is_retry());
 327 }
 328
 329 // Verify that a bogus response message is detected.
 330 TEST_F(GetUpdatesProcessorTest, InvalidResponse) {
 331   sync_pb::GetUpdatesResponse gu_response;
 332   InitFakeUpdateResponse(&gu_response);
 333
 334   // This field is essential for making the client stop looping.  If it's unset
 335   // then something is very wrong.  The client should detect this.
 336   gu_response.clear_changes_remaining();
 337
 338   sessions::NudgeTracker nudge_tracker;
 339   NormalGetUpdatesDelegate normal_delegate(nudge_tracker);
 340   sessions::StatusController status;
 341   scoped_ptr<GetUpdatesProcessor> processor(
 342       BuildGetUpdatesProcessor(normal_delegate));
 343   SyncerError error = processor->ProcessResponse(gu_response,
 344                                                  enabled_types(),
 345                                                  &status);
 346   EXPECT_EQ(error, SERVER_RESPONSE_VALIDATION_FAILED);
 347 }
 348
 349 // Verify that we correctly detect when there's more work to be done.
 350 TEST_F(GetUpdatesProcessorTest, MoreToDownloadResponse) {
 351   sync_pb::GetUpdatesResponse gu_response;
 352   InitFakeUpdateResponse(&gu_response);
 353   gu_response.set_changes_remaining(1);
 354
 355   sessions::NudgeTracker nudge_tracker;
 356   NormalGetUpdatesDelegate normal_delegate(nudge_tracker);
 357   sessions::StatusController status;
 358   scoped_ptr<GetUpdatesProcessor> processor(
 359       BuildGetUpdatesProcessor(normal_delegate));
 360   SyncerError error = processor->ProcessResponse(gu_response,
 361                                                  enabled_types(),
 362                                                  &status);
 363   EXPECT_EQ(error, SERVER_MORE_TO_DOWNLOAD);
 364 }
 365
 366 // A simple scenario: No updates returned and nothing more to download.
 367 TEST_F(GetUpdatesProcessorTest, NormalResponseTest) {
 368   sync_pb::GetUpdatesResponse gu_response;
 369   InitFakeUpdateResponse(&gu_response);
 370   gu_response.set_changes_remaining(0);
 371
 372   sessions::NudgeTracker nudge_tracker;
 373   NormalGetUpdatesDelegate normal_delegate(nudge_tracker);
 374   sessions::StatusController status;
 375   scoped_ptr<GetUpdatesProcessor> processor(
 376       BuildGetUpdatesProcessor(normal_delegate));
 377   SyncerError error = processor->ProcessResponse(gu_response,
 378                                                  enabled_types(),
 379                                                  &status);
 380   EXPECT_EQ(error, SYNCER_OK);
 381 }
 382
 383 // Variant of GetUpdatesProcessor test designed to test update application.
 384 //
 385 // Maintains two enabled types, but requests that updates be applied for only
 386 // one of them.
 387 class GetUpdatesProcessorApplyUpdatesTest : public GetUpdatesProcessorTest {
 388  public:
 389   GetUpdatesProcessorApplyUpdatesTest() {}
 390   virtual ~GetUpdatesProcessorApplyUpdatesTest() {}
 391
 392   virtual void SetUp() OVERRIDE {
 393     bookmarks_handler_ = AddUpdateHandler(BOOKMARKS);
 394     autofill_handler_ = AddUpdateHandler(AUTOFILL);
 395   }
 396
 397   ModelTypeSet GetGuTypes() {
 398     return ModelTypeSet(AUTOFILL);
 399   }
 400
 401   MockUpdateHandler* GetNonAppliedHandler() {
 402     return bookmarks_handler_;
 403   }
 404
 405   MockUpdateHandler* GetAppliedHandler() {
 406     return autofill_handler_;
 407   }
 408
 409  private:
 410   MockUpdateHandler* bookmarks_handler_;
 411   MockUpdateHandler* autofill_handler_;
 412 };
 413
 414 // Verify that a normal cycle applies updates non-passively to the specified
 415 // types.
 416 TEST_F(GetUpdatesProcessorApplyUpdatesTest, Normal) {
 417   sessions::NudgeTracker nudge_tracker;
 418   NormalGetUpdatesDelegate normal_delegate(nudge_tracker);
 419   scoped_ptr<GetUpdatesProcessor> processor(
 420       BuildGetUpdatesProcessor(normal_delegate));
 421
 422   EXPECT_EQ(0, GetNonAppliedHandler()->GetApplyUpdatesCount());
 423   EXPECT_EQ(0, GetAppliedHandler()->GetApplyUpdatesCount());
 424
 425   sessions::StatusController status;
 426   processor->ApplyUpdates(GetGuTypes(), &status);
 427
 428   EXPECT_EQ(0, GetNonAppliedHandler()->GetApplyUpdatesCount());
 429   EXPECT_EQ(1, GetAppliedHandler()->GetApplyUpdatesCount());
 430
 431   EXPECT_EQ(0, GetNonAppliedHandler()->GetPassiveApplyUpdatesCount());
 432   EXPECT_EQ(0, GetAppliedHandler()->GetPassiveApplyUpdatesCount());
 433 }
 434
 435 // Verify that a configure cycle applies updates passively to the specified
 436 // types.
 437 TEST_F(GetUpdatesProcessorApplyUpdatesTest, Configure) {
 438   ConfigureGetUpdatesDelegate configure_delegate(
 439       sync_pb::GetUpdatesCallerInfo::RECONFIGURATION);
 440   scoped_ptr<GetUpdatesProcessor> processor(
 441       BuildGetUpdatesProcessor(configure_delegate));
 442
 443   EXPECT_EQ(0, GetNonAppliedHandler()->GetPassiveApplyUpdatesCount());
 444   EXPECT_EQ(0, GetAppliedHandler()->GetPassiveApplyUpdatesCount());
 445
 446   sessions::StatusController status;
 447   processor->ApplyUpdates(GetGuTypes(), &status);
 448
 449   EXPECT_EQ(0, GetNonAppliedHandler()->GetPassiveApplyUpdatesCount());
 450   EXPECT_EQ(1, GetAppliedHandler()->GetPassiveApplyUpdatesCount());
 451
 452   EXPECT_EQ(0, GetNonAppliedHandler()->GetApplyUpdatesCount());
 453   EXPECT_EQ(0, GetAppliedHandler()->GetApplyUpdatesCount());
 454 }
 455
 456 // Verify that a poll cycle applies updates non-passively to the specified
 457 // types.
 458 TEST_F(GetUpdatesProcessorApplyUpdatesTest, Poll) {
 459   PollGetUpdatesDelegate poll_delegate;
 460   scoped_ptr<GetUpdatesProcessor> processor(
 461       BuildGetUpdatesProcessor(poll_delegate));
 462
 463   EXPECT_EQ(0, GetNonAppliedHandler()->GetApplyUpdatesCount());
 464   EXPECT_EQ(0, GetAppliedHandler()->GetApplyUpdatesCount());
 465
 466   sessions::StatusController status;
 467   processor->ApplyUpdates(GetGuTypes(), &status);
 468
 469   EXPECT_EQ(0, GetNonAppliedHandler()->GetApplyUpdatesCount());
 470   EXPECT_EQ(1, GetAppliedHandler()->GetApplyUpdatesCount());
 471
 472   EXPECT_EQ(0, GetNonAppliedHandler()->GetPassiveApplyUpdatesCount());
 473   EXPECT_EQ(0, GetAppliedHandler()->GetPassiveApplyUpdatesCount());
 474 }
 475
 476 class DownloadUpdatesDebugInfoTest : public ::testing::Test {
 477  public:
 478   DownloadUpdatesDebugInfoTest() {}
 479   virtual ~DownloadUpdatesDebugInfoTest() {}
 480
 481   sessions::StatusController* status() {
 482     return &status_;
 483   }
 484
 485   sessions::DebugInfoGetter* debug_info_getter() {
 486     return &debug_info_getter_;
 487   }
 488
 489   void AddDebugEvent() {
 490     debug_info_getter_.AddDebugEvent();
 491   }
 492
 493  private:
 494   sessions::StatusController status_;
 495   MockDebugInfoGetter debug_info_getter_;
 496 };
 497
 498 // Verify CopyClientDebugInfo when there are no events to upload.
 499 TEST_F(DownloadUpdatesDebugInfoTest, VerifyCopyClientDebugInfo_Empty) {
 500   sync_pb::DebugInfo debug_info;
 501   GetUpdatesProcessor::CopyClientDebugInfo(debug_info_getter(), &debug_info);
 502   EXPECT_EQ(0, debug_info.events_size());
 503 }
 504
 505 TEST_F(DownloadUpdatesDebugInfoTest, VerifyCopyOverwrites) {
 506   sync_pb::DebugInfo debug_info;
 507   AddDebugEvent();
 508   GetUpdatesProcessor::CopyClientDebugInfo(debug_info_getter(), &debug_info);
 509   EXPECT_EQ(1, debug_info.events_size());
 510   GetUpdatesProcessor::CopyClientDebugInfo(debug_info_getter(), &debug_info);
 511   EXPECT_EQ(1, debug_info.events_size());
 512 }
 513
 514 }  // namespace syncer