src/components/invalidation/registration_manager_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/invalidation/registration_manager.h"
   6
   7 #include <algorithm>
   8 #include <cmath>
   9 #include <cstddef>
  10 #include <deque>
  11 #include <vector>
  12
  13 #include "base/basictypes.h"
  14 #include "base/message_loop/message_loop.h"
  15 #include "base/stl_util.h"
  16 #include "components/invalidation/invalidation_util.h"
  17 #include "google/cacheinvalidation/include/invalidation-client.h"
  18 #include "testing/gtest/include/gtest/gtest.h"
  19
  20 namespace syncer {
  21 namespace {
  22
  23 // Fake registration manager that lets you override jitter.
  24 class FakeRegistrationManager : public RegistrationManager {
  25  public:
  26   explicit FakeRegistrationManager(
  27       invalidation::InvalidationClient* invalidation_client)
  28       : RegistrationManager(invalidation_client),
  29         jitter_(0.0) {}
  30
  31   ~FakeRegistrationManager() override {}
  32
  33   void SetJitter(double jitter) {
  34     jitter_ = jitter;
  35   }
  36
  37  protected:
  38   double GetJitter() override { return jitter_; }
  39
  40  private:
  41   double jitter_;
  42
  43   DISALLOW_COPY_AND_ASSIGN(FakeRegistrationManager);
  44 };
  45
  46 // Fake invalidation client that just stores the currently-registered
  47 // object IDs.
  48 class FakeInvalidationClient : public invalidation::InvalidationClient {
  49  public:
  50   FakeInvalidationClient() {}
  51
  52   ~FakeInvalidationClient() override {}
  53
  54   void LoseRegistration(const invalidation::ObjectId& oid) {
  55     EXPECT_TRUE(ContainsKey(registered_ids_, oid));
  56     registered_ids_.erase(oid);
  57   }
  58
  59   void LoseAllRegistrations() {
  60     registered_ids_.clear();
  61   }
  62
  63   // invalidation::InvalidationClient implementation.
  64
  65   void Start() override {}
  66   void Stop() override {}
  67   void Acknowledge(const invalidation::AckHandle& handle) override {}
  68
  69   void Register(const invalidation::ObjectId& oid) override {
  70     EXPECT_FALSE(ContainsKey(registered_ids_, oid));
  71     registered_ids_.insert(oid);
  72   }
  73
  74   void Register(const std::vector<invalidation::ObjectId>& oids) override {
  75     // Unused for now.
  76   }
  77
  78   void Unregister(const invalidation::ObjectId& oid) override {
  79     EXPECT_TRUE(ContainsKey(registered_ids_, oid));
  80     registered_ids_.erase(oid);
  81   }
  82
  83   void Unregister(const std::vector<invalidation::ObjectId>& oids) override {
  84     // Unused for now.
  85   }
  86
  87   const ObjectIdSet& GetRegisteredIdsForTest() const {
  88     return registered_ids_;
  89   }
  90
  91  private:
  92   ObjectIdSet registered_ids_;
  93
  94   DISALLOW_COPY_AND_ASSIGN(FakeInvalidationClient);
  95 };
  96
  97 size_t kObjectIdsCount = 5;
  98
  99 invalidation::ObjectId GetIdForIndex(size_t index) {
 100   char name[2] = "a";
 101   name[0] += static_cast<char>(index);
 102   return invalidation::ObjectId(1 + index, name);
 103 }
 104
 105 ObjectIdSet GetSequenceOfIdsStartingAt(size_t start, size_t count) {
 106   ObjectIdSet ids;
 107   for (size_t i = start; i < start + count; ++i)
 108     ids.insert(GetIdForIndex(i));
 109   return ids;
 110 }
 111
 112 ObjectIdSet GetSequenceOfIds(size_t count) {
 113   return GetSequenceOfIdsStartingAt(0, count);
 114 }
 115
 116 void ExpectPendingRegistrations(
 117     const ObjectIdSet& expected_pending_ids,
 118     double expected_delay_seconds,
 119     const RegistrationManager::PendingRegistrationMap& pending_registrations) {
 120   ObjectIdSet pending_ids;
 121   for (RegistrationManager::PendingRegistrationMap::const_iterator it =
 122            pending_registrations.begin(); it != pending_registrations.end();
 123        ++it) {
 124     SCOPED_TRACE(ObjectIdToString(it->first));
 125     pending_ids.insert(it->first);
 126     base::TimeDelta offset =
 127         it->second.last_registration_request -
 128         it->second.registration_attempt;
 129     base::TimeDelta expected_delay =
 130         base::TimeDelta::FromSeconds(
 131             static_cast<int64>(expected_delay_seconds)) + offset;
 132     // TODO(akalin): Add base::PrintTo() for base::Time and
 133     // base::TimeDeltas.
 134     EXPECT_EQ(expected_delay, it->second.delay)
 135         << expected_delay.InMicroseconds()
 136         << ", " << it->second.delay.InMicroseconds();
 137     if (it->second.delay <= base::TimeDelta()) {
 138       EXPECT_EQ(base::TimeDelta(), it->second.actual_delay);
 139     } else {
 140       EXPECT_EQ(it->second.actual_delay, it->second.delay);
 141     }
 142   }
 143   EXPECT_EQ(expected_pending_ids, pending_ids);
 144 }
 145
 146 class RegistrationManagerTest : public testing::Test {
 147  protected:
 148   RegistrationManagerTest()
 149       : fake_registration_manager_(&fake_invalidation_client_) {}
 150
 151   ~RegistrationManagerTest() override {}
 152
 153   void LoseRegistrations(const ObjectIdSet& oids) {
 154     for (ObjectIdSet::const_iterator it = oids.begin(); it != oids.end();
 155          ++it) {
 156       fake_invalidation_client_.LoseRegistration(*it);
 157       fake_registration_manager_.MarkRegistrationLost(*it);
 158     }
 159   }
 160
 161   void DisableIds(const ObjectIdSet& oids) {
 162     for (ObjectIdSet::const_iterator it = oids.begin(); it != oids.end();
 163          ++it) {
 164       fake_invalidation_client_.LoseRegistration(*it);
 165       fake_registration_manager_.DisableId(*it);
 166     }
 167   }
 168
 169   // Used by MarkRegistrationLostBackoff* tests.
 170   void RunBackoffTest(double jitter) {
 171     fake_registration_manager_.SetJitter(jitter);
 172     ObjectIdSet ids = GetSequenceOfIds(kObjectIdsCount);
 173     fake_registration_manager_.UpdateRegisteredIds(ids);
 174
 175     // Lose some ids.
 176     ObjectIdSet lost_ids = GetSequenceOfIds(2);
 177     LoseRegistrations(lost_ids);
 178     ExpectPendingRegistrations(
 179         lost_ids, 0.0,
 180         fake_registration_manager_.GetPendingRegistrationsForTest());
 181
 182     // Trigger another failure to start delaying.
 183     fake_registration_manager_.FirePendingRegistrationsForTest();
 184     LoseRegistrations(lost_ids);
 185
 186     double scaled_jitter =
 187         jitter * RegistrationManager::kRegistrationDelayMaxJitter;
 188
 189     double expected_delay =
 190         RegistrationManager::kInitialRegistrationDelaySeconds *
 191         (1.0 + scaled_jitter);
 192     expected_delay = std::floor(expected_delay);
 193     ExpectPendingRegistrations(
 194         lost_ids, expected_delay,
 195         fake_registration_manager_.GetPendingRegistrationsForTest());
 196
 197     // Trigger another failure.
 198     fake_registration_manager_.FirePendingRegistrationsForTest();
 199     LoseRegistrations(lost_ids);
 200     expected_delay *=
 201         RegistrationManager::kRegistrationDelayExponent + scaled_jitter;
 202     expected_delay = std::floor(expected_delay);
 203     ExpectPendingRegistrations(
 204         lost_ids, expected_delay,
 205         fake_registration_manager_.GetPendingRegistrationsForTest());
 206
 207     // Trigger enough failures to hit the ceiling.
 208     while (expected_delay < RegistrationManager::kMaxRegistrationDelaySeconds) {
 209       fake_registration_manager_.FirePendingRegistrationsForTest();
 210       LoseRegistrations(lost_ids);
 211       expected_delay *=
 212           RegistrationManager::kRegistrationDelayExponent + scaled_jitter;
 213       expected_delay = std::floor(expected_delay);
 214     }
 215     ExpectPendingRegistrations(
 216         lost_ids,
 217         RegistrationManager::kMaxRegistrationDelaySeconds,
 218         fake_registration_manager_.GetPendingRegistrationsForTest());
 219   }
 220
 221   FakeInvalidationClient fake_invalidation_client_;
 222   FakeRegistrationManager fake_registration_manager_;
 223
 224  private:
 225   // Needed by timers in RegistrationManager.
 226   base::MessageLoop message_loop_;
 227
 228   DISALLOW_COPY_AND_ASSIGN(RegistrationManagerTest);
 229 };
 230
 231 // Basic test of UpdateRegisteredIds to make sure we properly register
 232 // new IDs and unregister any IDs no longer in the set.
 233 TEST_F(RegistrationManagerTest, UpdateRegisteredIds) {
 234   ObjectIdSet ids = GetSequenceOfIds(kObjectIdsCount - 1);
 235
 236   EXPECT_TRUE(fake_registration_manager_.GetRegisteredIdsForTest().empty());
 237   EXPECT_TRUE(fake_invalidation_client_.GetRegisteredIdsForTest().empty());
 238
 239   ObjectIdSet expected_unregistered_ids;
 240
 241   ObjectIdSet unregistered_ids =
 242       fake_registration_manager_.UpdateRegisteredIds(ids);
 243   EXPECT_EQ(expected_unregistered_ids, unregistered_ids);
 244   EXPECT_EQ(ids, fake_registration_manager_.GetRegisteredIdsForTest());
 245   EXPECT_EQ(ids, fake_invalidation_client_.GetRegisteredIdsForTest());
 246
 247   ids.insert(GetIdForIndex(kObjectIdsCount - 1));
 248   ids.erase(GetIdForIndex(kObjectIdsCount - 2));
 249   unregistered_ids = fake_registration_manager_.UpdateRegisteredIds(ids);
 250   expected_unregistered_ids.insert(GetIdForIndex(kObjectIdsCount - 2));
 251   EXPECT_EQ(expected_unregistered_ids, unregistered_ids);
 252   EXPECT_EQ(ids, fake_registration_manager_.GetRegisteredIdsForTest());
 253   EXPECT_EQ(ids, fake_invalidation_client_.GetRegisteredIdsForTest());
 254 }
 255
 256 int GetRoundedBackoff(double retry_interval, double jitter) {
 257   const double kInitialRetryInterval = 3.0;
 258   const double kMinRetryInterval = 2.0;
 259   const double kMaxRetryInterval = 20.0;
 260   const double kBackoffExponent = 2.0;
 261   const double kMaxJitter = 0.5;
 262
 263   return static_cast<int>(
 264       RegistrationManager::CalculateBackoff(retry_interval,
 265                                             kInitialRetryInterval,
 266                                             kMinRetryInterval,
 267                                             kMaxRetryInterval,
 268                                             kBackoffExponent,
 269                                             jitter,
 270                                             kMaxJitter));
 271 }
 272
 273 TEST_F(RegistrationManagerTest, CalculateBackoff) {
 274   // Test initial.
 275   EXPECT_EQ(2, GetRoundedBackoff(0.0, -1.0));
 276   EXPECT_EQ(3, GetRoundedBackoff(0.0,  0.0));
 277   EXPECT_EQ(4, GetRoundedBackoff(0.0, +1.0));
 278
 279   // Test non-initial.
 280   EXPECT_EQ(4, GetRoundedBackoff(3.0, -1.0));
 281   EXPECT_EQ(6, GetRoundedBackoff(3.0,  0.0));
 282   EXPECT_EQ(7, GetRoundedBackoff(3.0, +1.0));
 283
 284   EXPECT_EQ(7, GetRoundedBackoff(5.0, -1.0));
 285   EXPECT_EQ(10, GetRoundedBackoff(5.0,  0.0));
 286   EXPECT_EQ(12, GetRoundedBackoff(5.0, +1.0));
 287
 288   // Test ceiling.
 289   EXPECT_EQ(19, GetRoundedBackoff(13.0, -1.0));
 290   EXPECT_EQ(20, GetRoundedBackoff(13.0,  0.0));
 291   EXPECT_EQ(20, GetRoundedBackoff(13.0, +1.0));
 292 }
 293
 294 // Losing a registration should queue automatic re-registration.
 295 TEST_F(RegistrationManagerTest, MarkRegistrationLost) {
 296   ObjectIdSet ids = GetSequenceOfIds(kObjectIdsCount);
 297
 298   fake_registration_manager_.UpdateRegisteredIds(ids);
 299   EXPECT_TRUE(
 300       fake_registration_manager_.GetPendingRegistrationsForTest().empty());
 301
 302   // Lose some ids.
 303   ObjectIdSet lost_ids = GetSequenceOfIds(3);
 304   ObjectIdSet non_lost_ids = GetSequenceOfIdsStartingAt(3, kObjectIdsCount - 3);
 305   LoseRegistrations(lost_ids);
 306   ExpectPendingRegistrations(
 307       lost_ids, 0.0,
 308       fake_registration_manager_.GetPendingRegistrationsForTest());
 309   EXPECT_EQ(non_lost_ids, fake_registration_manager_.GetRegisteredIdsForTest());
 310   EXPECT_EQ(non_lost_ids, fake_invalidation_client_.GetRegisteredIdsForTest());
 311
 312   // Pretend we waited long enough to re-register.
 313   fake_registration_manager_.FirePendingRegistrationsForTest();
 314   EXPECT_EQ(ids, fake_registration_manager_.GetRegisteredIdsForTest());
 315   EXPECT_EQ(ids, fake_invalidation_client_.GetRegisteredIdsForTest());
 316 }
 317
 318 TEST_F(RegistrationManagerTest, MarkRegistrationLostBackoffLow) {
 319   RunBackoffTest(-1.0);
 320 }
 321
 322 TEST_F(RegistrationManagerTest, MarkRegistrationLostBackoffMid) {
 323   RunBackoffTest(0.0);
 324 }
 325
 326 TEST_F(RegistrationManagerTest, MarkRegistrationLostBackoffHigh) {
 327   RunBackoffTest(+1.0);
 328 }
 329
 330 // Exponential backoff on lost registrations should be reset to zero if
 331 // UpdateRegisteredIds is called.
 332 TEST_F(RegistrationManagerTest, MarkRegistrationLostBackoffReset) {
 333   ObjectIdSet ids = GetSequenceOfIds(kObjectIdsCount);
 334
 335   fake_registration_manager_.UpdateRegisteredIds(ids);
 336
 337   // Lose some ids.
 338   ObjectIdSet lost_ids = GetSequenceOfIds(2);
 339   LoseRegistrations(lost_ids);
 340   ExpectPendingRegistrations(
 341       lost_ids, 0.0,
 342       fake_registration_manager_.GetPendingRegistrationsForTest());
 343
 344   // Trigger another failure to start delaying.
 345   fake_registration_manager_.FirePendingRegistrationsForTest();
 346   LoseRegistrations(lost_ids);
 347   double expected_delay =
 348       RegistrationManager::kInitialRegistrationDelaySeconds;
 349   ExpectPendingRegistrations(
 350       lost_ids, expected_delay,
 351       fake_registration_manager_.GetPendingRegistrationsForTest());
 352
 353   // Set ids again.
 354   fake_registration_manager_.UpdateRegisteredIds(ids);
 355   ExpectPendingRegistrations(
 356       ObjectIdSet(),
 357       0.0,
 358       fake_registration_manager_.GetPendingRegistrationsForTest());
 359 }
 360
 361 TEST_F(RegistrationManagerTest, MarkAllRegistrationsLost) {
 362   ObjectIdSet ids = GetSequenceOfIds(kObjectIdsCount);
 363
 364   fake_registration_manager_.UpdateRegisteredIds(ids);
 365
 366   fake_invalidation_client_.LoseAllRegistrations();
 367   fake_registration_manager_.MarkAllRegistrationsLost();
 368
 369   EXPECT_TRUE(fake_registration_manager_.GetRegisteredIdsForTest().empty());
 370   EXPECT_TRUE(fake_invalidation_client_.GetRegisteredIdsForTest().empty());
 371
 372   ExpectPendingRegistrations(
 373       ids, 0.0,
 374       fake_registration_manager_.GetPendingRegistrationsForTest());
 375
 376   // Trigger another failure to start delaying.
 377   fake_registration_manager_.FirePendingRegistrationsForTest();
 378   fake_invalidation_client_.LoseAllRegistrations();
 379   fake_registration_manager_.MarkAllRegistrationsLost();
 380   double expected_delay =
 381       RegistrationManager::kInitialRegistrationDelaySeconds;
 382   ExpectPendingRegistrations(
 383       ids, expected_delay,
 384       fake_registration_manager_.GetPendingRegistrationsForTest());
 385
 386   // Pretend we waited long enough to re-register.
 387   fake_registration_manager_.FirePendingRegistrationsForTest();
 388   EXPECT_EQ(ids, fake_registration_manager_.GetRegisteredIdsForTest());
 389   EXPECT_EQ(ids, fake_invalidation_client_.GetRegisteredIdsForTest());
 390 }
 391
 392 // IDs that are disabled should not be re-registered by UpdateRegisteredIds or
 393 // automatic re-registration if that registration is lost.
 394 TEST_F(RegistrationManagerTest, DisableId) {
 395   ObjectIdSet ids = GetSequenceOfIds(kObjectIdsCount);
 396
 397   fake_registration_manager_.UpdateRegisteredIds(ids);
 398   EXPECT_TRUE(
 399       fake_registration_manager_.GetPendingRegistrationsForTest().empty());
 400
 401   // Disable some ids.
 402   ObjectIdSet disabled_ids = GetSequenceOfIds(3);
 403   ObjectIdSet enabled_ids = GetSequenceOfIdsStartingAt(3, kObjectIdsCount - 3);
 404   DisableIds(disabled_ids);
 405   ExpectPendingRegistrations(
 406       ObjectIdSet(),
 407       0.0,
 408       fake_registration_manager_.GetPendingRegistrationsForTest());
 409   EXPECT_EQ(enabled_ids, fake_registration_manager_.GetRegisteredIdsForTest());
 410   EXPECT_EQ(enabled_ids, fake_invalidation_client_.GetRegisteredIdsForTest());
 411
 412   fake_registration_manager_.UpdateRegisteredIds(ids);
 413   EXPECT_EQ(enabled_ids, fake_registration_manager_.GetRegisteredIdsForTest());
 414
 415   fake_registration_manager_.MarkRegistrationLost(
 416       *disabled_ids.begin());
 417   ExpectPendingRegistrations(
 418       ObjectIdSet(),
 419       0.0,
 420       fake_registration_manager_.GetPendingRegistrationsForTest());
 421
 422   fake_registration_manager_.MarkAllRegistrationsLost();
 423   ExpectPendingRegistrations(
 424       enabled_ids, 0.0,
 425       fake_registration_manager_.GetPendingRegistrationsForTest());
 426 }
 427
 428 }  // namespace
 429 }  // namespace syncer