google_apis/gcm/engine/heartbeat_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 "google_apis/gcm/engine/heartbeat_manager.h"
   6
   7 #include "base/bind.h"
   8 #include "base/bind_helpers.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/message_loop/message_loop.h"
  11 #include "base/time/time.h"
  12 #include "base/timer/timer.h"
  13 #include "google_apis/gcm/protocol/mcs.pb.h"
  14 #include "testing/gtest/include/gtest/gtest.h"
  15
  16 namespace gcm {
  17
  18 namespace {
  19
  20 mcs_proto::HeartbeatConfig BuildHeartbeatConfig(int interval_ms) {
  21   mcs_proto::HeartbeatConfig config;
  22   config.set_interval_ms(interval_ms);
  23   return config;
  24 }
  25
  26 class TestHeartbeatManager : public HeartbeatManager {
  27  public:
  28   TestHeartbeatManager() {}
  29   ~TestHeartbeatManager() override {}
  30
  31   // Bypass the heartbeat timer, and send the heartbeat now.
  32   void TriggerHearbeat();
  33
  34   // Check for a missed heartbeat now.
  35   void TriggerMissedHeartbeatCheck();
  36 };
  37
  38 void TestHeartbeatManager::TriggerHearbeat() {
  39   OnHeartbeatTriggered();
  40 }
  41
  42 void TestHeartbeatManager::TriggerMissedHeartbeatCheck() {
  43   CheckForMissedHeartbeat();
  44 }
  45
  46 class HeartbeatManagerTest : public testing::Test {
  47  public:
  48   HeartbeatManagerTest();
  49   ~HeartbeatManagerTest() override {}
  50
  51   TestHeartbeatManager* manager() const { return manager_.get(); }
  52   int heartbeats_sent() const { return heartbeats_sent_; }
  53   int reconnects_triggered() const { return reconnects_triggered_; }
  54
  55   // Starts the heartbeat manager.
  56   void StartManager();
  57
  58  private:
  59   // Helper functions for verifying heartbeat manager effects.
  60   void SendHeartbeatClosure();
  61   void TriggerReconnectClosure();
  62
  63   scoped_ptr<TestHeartbeatManager> manager_;
  64
  65   int heartbeats_sent_;
  66   int reconnects_triggered_;
  67
  68   base::MessageLoop message_loop_;
  69 };
  70
  71 HeartbeatManagerTest::HeartbeatManagerTest()
  72     : manager_(new TestHeartbeatManager()),
  73       heartbeats_sent_(0),
  74       reconnects_triggered_(0) {
  75 }
  76
  77 void HeartbeatManagerTest::StartManager() {
  78   manager_->Start(base::Bind(&HeartbeatManagerTest::SendHeartbeatClosure,
  79                              base::Unretained(this)),
  80                   base::Bind(&HeartbeatManagerTest::TriggerReconnectClosure,
  81                              base::Unretained(this)));
  82 }
  83
  84 void HeartbeatManagerTest::SendHeartbeatClosure() {
  85   heartbeats_sent_++;
  86 }
  87
  88 void HeartbeatManagerTest::TriggerReconnectClosure() {
  89   reconnects_triggered_++;
  90 }
  91
  92 // Basic initialization. No heartbeat should be pending.
  93 TEST_F(HeartbeatManagerTest, Init) {
  94   EXPECT_TRUE(manager()->GetNextHeartbeatTime().is_null());
  95 }
  96
  97 // Acknowledging a heartbeat before starting the manager should have no effect.
  98 TEST_F(HeartbeatManagerTest, AckBeforeStart) {
  99   manager()->OnHeartbeatAcked();
 100   EXPECT_TRUE(manager()->GetNextHeartbeatTime().is_null());
 101 }
 102
 103 // Starting the manager should start the heartbeat timer.
 104 TEST_F(HeartbeatManagerTest, Start) {
 105   StartManager();
 106   EXPECT_GT(manager()->GetNextHeartbeatTime(), base::TimeTicks::Now());
 107   EXPECT_EQ(0, heartbeats_sent());
 108   EXPECT_EQ(0, reconnects_triggered());
 109 }
 110
 111 // Acking the heartbeat should trigger a new heartbeat timer.
 112 TEST_F(HeartbeatManagerTest, AckedHeartbeat) {
 113   StartManager();
 114   manager()->TriggerHearbeat();
 115   base::TimeTicks heartbeat = manager()->GetNextHeartbeatTime();
 116   EXPECT_GT(heartbeat, base::TimeTicks::Now());
 117   EXPECT_EQ(1, heartbeats_sent());
 118   EXPECT_EQ(0, reconnects_triggered());
 119
 120   manager()->OnHeartbeatAcked();
 121   EXPECT_LT(heartbeat, manager()->GetNextHeartbeatTime());
 122   EXPECT_EQ(1, heartbeats_sent());
 123   EXPECT_EQ(0, reconnects_triggered());
 124
 125   manager()->TriggerHearbeat();
 126   EXPECT_EQ(2, heartbeats_sent());
 127   EXPECT_EQ(0, reconnects_triggered());
 128 }
 129
 130 // Trigger a heartbeat when one was outstanding should reset the connection.
 131 TEST_F(HeartbeatManagerTest, UnackedHeartbeat) {
 132   StartManager();
 133   manager()->TriggerHearbeat();
 134   EXPECT_EQ(1, heartbeats_sent());
 135   EXPECT_EQ(0, reconnects_triggered());
 136
 137   manager()->TriggerHearbeat();
 138   EXPECT_EQ(1, heartbeats_sent());
 139   EXPECT_EQ(1, reconnects_triggered());
 140 }
 141
 142 // Updating the heartbeat interval before starting should result in the new
 143 // interval being used at Start time.
 144 TEST_F(HeartbeatManagerTest, UpdateIntervalThenStart) {
 145   const int kIntervalMs = 60 * 1000;  // 60 seconds.
 146   manager()->UpdateHeartbeatConfig(BuildHeartbeatConfig(kIntervalMs));
 147   EXPECT_TRUE(manager()->GetNextHeartbeatTime().is_null());
 148   StartManager();
 149   EXPECT_LE(manager()->GetNextHeartbeatTime() - base::TimeTicks::Now(),
 150             base::TimeDelta::FromMilliseconds(kIntervalMs));
 151 }
 152
 153 // Updating the heartbeat interval after starting should only use the new
 154 // interval on the next heartbeat.
 155 TEST_F(HeartbeatManagerTest, StartThenUpdateInterval) {
 156   const int kIntervalMs = 60 * 1000;  // 60 seconds.
 157   StartManager();
 158   base::TimeTicks heartbeat = manager()->GetNextHeartbeatTime();
 159   EXPECT_GT(heartbeat - base::TimeTicks::Now(),
 160             base::TimeDelta::FromMilliseconds(kIntervalMs));
 161
 162   // Updating the interval should not affect an outstanding heartbeat.
 163   manager()->UpdateHeartbeatConfig(BuildHeartbeatConfig(kIntervalMs));
 164   EXPECT_EQ(heartbeat, manager()->GetNextHeartbeatTime());
 165
 166   // Triggering and acking the heartbeat should result in a heartbeat being
 167   // posted with the new interval.
 168   manager()->TriggerHearbeat();
 169   manager()->OnHeartbeatAcked();
 170
 171   EXPECT_LE(manager()->GetNextHeartbeatTime() - base::TimeTicks::Now(),
 172             base::TimeDelta::FromMilliseconds(kIntervalMs));
 173   EXPECT_NE(heartbeat, manager()->GetNextHeartbeatTime());
 174 }
 175
 176 // Updating the timer used for heartbeats before starting should not start the
 177 // timer.
 178 TEST_F(HeartbeatManagerTest, UpdateTimerBeforeStart) {
 179   manager()->UpdateHeartbeatTimer(
 180       make_scoped_ptr(new base::Timer(true, false)));
 181   EXPECT_TRUE(manager()->GetNextHeartbeatTime().is_null());
 182 }
 183
 184 // Updating the timer used for heartbeats after starting should restart the
 185 // timer but not increase the heartbeat time by more than a millisecond.
 186 TEST_F(HeartbeatManagerTest, UpdateTimerAfterStart) {
 187   StartManager();
 188   base::TimeTicks heartbeat = manager()->GetNextHeartbeatTime();
 189
 190   manager()->UpdateHeartbeatTimer(
 191       make_scoped_ptr(new base::Timer(true, false)));
 192   EXPECT_LT(manager()->GetNextHeartbeatTime() - heartbeat,
 193             base::TimeDelta::FromMilliseconds(5));
 194 }
 195
 196 // Stopping the manager should reset the heartbeat timer.
 197 TEST_F(HeartbeatManagerTest, Stop) {
 198   StartManager();
 199   EXPECT_GT(manager()->GetNextHeartbeatTime(), base::TimeTicks::Now());
 200
 201   manager()->Stop();
 202   EXPECT_TRUE(manager()->GetNextHeartbeatTime().is_null());
 203 }
 204
 205 // Simulate missing a heartbeat by manually invoking the check method. The
 206 // heartbeat should only be triggered once, and only if the heartbeat timer
 207 // is running. Because the period is several minutes, none should fire.
 208 TEST_F(HeartbeatManagerTest, MissedHeartbeat) {
 209   // Do nothing while stopped.
 210   manager()->TriggerMissedHeartbeatCheck();
 211   StartManager();
 212   EXPECT_EQ(0, heartbeats_sent());
 213
 214   // Do nothing before the period is reached.
 215   manager()->TriggerMissedHeartbeatCheck();
 216   EXPECT_EQ(0, heartbeats_sent());
 217 }
 218
 219 }  // namespace
 220
 221 }  // namespace gcm