| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "components/network_time/network_time_tracker.h" |
| |
| #include <memory> |
| #include <string> |
| #include <utility> |
| |
| #include "base/bind.h" |
| #include "base/compiler_specific.h" |
| #include "base/run_loop.h" |
| #include "base/stl_util.h" |
| #include "base/strings/stringprintf.h" |
| #include "base/test/metrics/histogram_tester.h" |
| #include "base/test/scoped_task_environment.h" |
| #include "base/test/simple_test_clock.h" |
| #include "base/test/simple_test_tick_clock.h" |
| #include "components/client_update_protocol/ecdsa.h" |
| #include "components/network_time/network_time_pref_names.h" |
| #include "components/network_time/network_time_test_utils.h" |
| #include "components/prefs/testing_pref_service.h" |
| #include "net/http/http_response_headers.h" |
| #include "net/test/embedded_test_server/embedded_test_server.h" |
| #include "net/test/embedded_test_server/http_response.h" |
| #include "services/network/test/test_shared_url_loader_factory.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| |
| namespace network_time { |
| |
| namespace { |
| const uint32_t kOneDayInSeconds = 86400; |
| const char kFetchFailedHistogram[] = "NetworkTimeTracker.UpdateTimeFetchFailed"; |
| const char kFetchValidHistogram[] = "NetworkTimeTracker.UpdateTimeFetchValid"; |
| const char kClockDivergencePositiveHistogram[] = |
| "NetworkTimeTracker.ClockDivergence.Positive"; |
| const char kClockDivergenceNegativeHistogram[] = |
| "NetworkTimeTracker.ClockDivergence.Negative"; |
| const char kWallClockBackwardsHistogram[] = |
| "NetworkTimeTracker.WallClockRanBackwards"; |
| const char kTimeBetweenFetchesHistogram[] = |
| "NetworkTimeTracker.TimeBetweenFetches"; |
| } // namespace |
| |
| class NetworkTimeTrackerTest : public ::testing::Test { |
| public: |
| ~NetworkTimeTrackerTest() override {} |
| |
| NetworkTimeTrackerTest() |
| : task_environment_( |
| base::test::ScopedTaskEnvironment::MainThreadType::IO), |
| field_trial_test_(new FieldTrialTest()), |
| clock_(new base::SimpleTestClock), |
| tick_clock_(new base::SimpleTestTickClock), |
| test_server_(new net::EmbeddedTestServer) { |
| NetworkTimeTracker::RegisterPrefs(pref_service_.registry()); |
| |
| field_trial_test_->SetNetworkQueriesWithVariationsService( |
| true, 0.0 /* query probability */, |
| NetworkTimeTracker::FETCHES_IN_BACKGROUND_AND_ON_DEMAND); |
| |
| shared_url_loader_factory_ = |
| base::MakeRefCounted<network::TestSharedURLLoaderFactory>(); |
| |
| tracker_.reset(new NetworkTimeTracker( |
| std::unique_ptr<base::Clock>(clock_), |
| std::unique_ptr<const base::TickClock>(tick_clock_), &pref_service_, |
| shared_url_loader_factory_)); |
| |
| // Do this to be sure that |is_null| returns false. |
| clock_->Advance(base::TimeDelta::FromDays(111)); |
| tick_clock_->Advance(base::TimeDelta::FromDays(222)); |
| |
| // Can not be smaller than 15, it's the NowFromSystemTime() resolution. |
| resolution_ = base::TimeDelta::FromMilliseconds(17); |
| latency_ = base::TimeDelta::FromMilliseconds(50); |
| adjustment_ = 7 * base::TimeDelta::FromMilliseconds(kTicksResolutionMs); |
| } |
| |
| // Replaces |tracker_| with a new object, while preserving the |
| // testing clocks. |
| void Reset() { |
| base::SimpleTestClock* new_clock = new base::SimpleTestClock(); |
| new_clock->SetNow(clock_->Now()); |
| base::SimpleTestTickClock* new_tick_clock = new base::SimpleTestTickClock(); |
| new_tick_clock->SetNowTicks(tick_clock_->NowTicks()); |
| clock_ = new_clock; |
| tick_clock_ = new_tick_clock; |
| tracker_.reset(new NetworkTimeTracker( |
| std::unique_ptr<base::Clock>(clock_), |
| std::unique_ptr<const base::TickClock>(tick_clock_), &pref_service_, |
| shared_url_loader_factory_)); |
| } |
| |
| // Good signature over invalid data, though made with a non-production key. |
| static std::unique_ptr<net::test_server::HttpResponse> BadDataResponseHandler( |
| const net::test_server::HttpRequest& request) { |
| net::test_server::BasicHttpResponse* response = |
| new net::test_server::BasicHttpResponse(); |
| response->set_code(net::HTTP_OK); |
| response->set_content( |
| ")]}'\n" |
| "{\"current_time_millis\":NaN,\"server_nonce\":9.420921002039447E182}"); |
| response->AddCustomHeader( |
| "x-cup-server-proof", |
| "3046022100a07aa437b24f1f6bb7ff6f6d1e004dd4bcb717c93e21d6bae5ef8d6d984c" |
| "86a7022100e423419ff49fae37b421ef6cdeab348b45c63b236ab365f36f4cd3b4d4d6" |
| "d852:" |
| "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b85" |
| "5"); |
| return std::unique_ptr<net::test_server::HttpResponse>(response); |
| } |
| |
| static std::unique_ptr<net::test_server::HttpResponse> |
| BadSignatureResponseHandler(const net::test_server::HttpRequest& request) { |
| net::test_server::BasicHttpResponse* response = |
| new net::test_server::BasicHttpResponse(); |
| response->set_code(net::HTTP_OK); |
| response->set_content( |
| ")]}'\n" |
| "{\"current_time_millis\":1461621971825,\"server_nonce\":-6." |
| "006853099049523E85}"); |
| response->AddCustomHeader("x-cup-server-proof", "dead:beef"); |
| return std::unique_ptr<net::test_server::HttpResponse>(response); |
| } |
| |
| static std::unique_ptr<net::test_server::HttpResponse> |
| ServerErrorResponseHandler(const net::test_server::HttpRequest& request) { |
| net::test_server::BasicHttpResponse* response = |
| new net::test_server::BasicHttpResponse(); |
| response->set_code(net::HTTP_INTERNAL_SERVER_ERROR); |
| return std::unique_ptr<net::test_server::HttpResponse>(response); |
| } |
| |
| static std::unique_ptr<net::test_server::HttpResponse> |
| NetworkErrorResponseHandler(const net::test_server::HttpRequest& request) { |
| return std::unique_ptr<net::test_server::HttpResponse>( |
| new net::test_server::RawHttpResponse("", "")); |
| } |
| |
| // Updates the notifier's time with the specified parameters. |
| void UpdateNetworkTime(const base::Time& network_time, |
| const base::TimeDelta& resolution, |
| const base::TimeDelta& latency, |
| const base::TimeTicks& post_time) { |
| tracker_->UpdateNetworkTime( |
| network_time, resolution, latency, post_time); |
| } |
| |
| // Advances both the system clock and the tick clock. This should be used for |
| // the normal passage of time, i.e. when neither clock is doing anything odd. |
| void AdvanceBoth(const base::TimeDelta& delta) { |
| tick_clock_->Advance(delta); |
| clock_->Advance(delta); |
| } |
| |
| protected: |
| base::test::ScopedTaskEnvironment task_environment_; |
| std::unique_ptr<FieldTrialTest> field_trial_test_; |
| base::TimeDelta resolution_; |
| base::TimeDelta latency_; |
| base::TimeDelta adjustment_; |
| base::SimpleTestClock* clock_; |
| base::SimpleTestTickClock* tick_clock_; |
| TestingPrefServiceSimple pref_service_; |
| std::unique_ptr<NetworkTimeTracker> tracker_; |
| std::unique_ptr<net::EmbeddedTestServer> test_server_; |
| scoped_refptr<network::TestSharedURLLoaderFactory> shared_url_loader_factory_; |
| }; |
| |
| TEST_F(NetworkTimeTrackerTest, Uninitialized) { |
| base::Time network_time; |
| base::TimeDelta uncertainty; |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_NO_SYNC_ATTEMPT, |
| tracker_->GetNetworkTime(&network_time, &uncertainty)); |
| } |
| |
| TEST_F(NetworkTimeTrackerTest, LongPostingDelay) { |
| // The request arrives at the server, which records the time. Advance the |
| // clock to simulate the latency of sending the reply, which we'll say for |
| // convenience is half the total latency. |
| base::Time in_network_time = clock_->Now(); |
| AdvanceBoth(latency_ / 2); |
| |
| // Record the tick counter at the time the reply is received. At this point, |
| // we would post UpdateNetworkTime to be run on the browser thread. |
| base::TimeTicks posting_time = tick_clock_->NowTicks(); |
| |
| // Simulate that it look a long time (1888us) for the browser thread to get |
| // around to executing the update. |
| AdvanceBoth(base::TimeDelta::FromMicroseconds(1888)); |
| UpdateNetworkTime(in_network_time, resolution_, latency_, posting_time); |
| |
| base::Time out_network_time; |
| base::TimeDelta uncertainty; |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_AVAILABLE, |
| tracker_->GetNetworkTime(&out_network_time, &uncertainty)); |
| EXPECT_EQ(resolution_ + latency_ + adjustment_, uncertainty); |
| EXPECT_EQ(clock_->Now(), out_network_time); |
| } |
| |
| TEST_F(NetworkTimeTrackerTest, LopsidedLatency) { |
| // Simulate that the server received the request instantaneously, and that all |
| // of the latency was in sending the reply. (This contradicts the assumption |
| // in the code.) |
| base::Time in_network_time = clock_->Now(); |
| AdvanceBoth(latency_); |
| UpdateNetworkTime(in_network_time, resolution_, latency_, |
| tick_clock_->NowTicks()); |
| |
| // But, the answer is still within the uncertainty bounds! |
| base::Time out_network_time; |
| base::TimeDelta uncertainty; |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_AVAILABLE, |
| tracker_->GetNetworkTime(&out_network_time, &uncertainty)); |
| EXPECT_LT(out_network_time - uncertainty / 2, clock_->Now()); |
| EXPECT_GT(out_network_time + uncertainty / 2, clock_->Now()); |
| } |
| |
| TEST_F(NetworkTimeTrackerTest, ClockIsWack) { |
| // Now let's assume the system clock is completely wrong. |
| base::Time in_network_time = clock_->Now() - base::TimeDelta::FromDays(90); |
| UpdateNetworkTime(in_network_time - latency_ / 2, resolution_, latency_, |
| tick_clock_->NowTicks()); |
| |
| base::Time out_network_time; |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_AVAILABLE, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| EXPECT_EQ(in_network_time, out_network_time); |
| } |
| |
| TEST_F(NetworkTimeTrackerTest, ClocksDivergeSlightly) { |
| // The two clocks are allowed to diverge a little bit. |
| base::HistogramTester histograms; |
| histograms.ExpectTotalCount(kClockDivergencePositiveHistogram, 0); |
| histograms.ExpectTotalCount(kClockDivergenceNegativeHistogram, 0); |
| histograms.ExpectTotalCount(kWallClockBackwardsHistogram, 0); |
| base::Time in_network_time = clock_->Now(); |
| UpdateNetworkTime(in_network_time - latency_ / 2, resolution_, latency_, |
| tick_clock_->NowTicks()); |
| |
| base::TimeDelta small = base::TimeDelta::FromSeconds(30); |
| tick_clock_->Advance(small); |
| base::Time out_network_time; |
| base::TimeDelta out_uncertainty; |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_AVAILABLE, |
| tracker_->GetNetworkTime(&out_network_time, &out_uncertainty)); |
| EXPECT_EQ(in_network_time + small, out_network_time); |
| // The clock divergence should show up in the uncertainty. |
| EXPECT_EQ(resolution_ + latency_ + adjustment_ + small, out_uncertainty); |
| histograms.ExpectTotalCount(kClockDivergencePositiveHistogram, 0); |
| histograms.ExpectTotalCount(kClockDivergenceNegativeHistogram, 0); |
| histograms.ExpectTotalCount(kWallClockBackwardsHistogram, 0); |
| } |
| |
| TEST_F(NetworkTimeTrackerTest, NetworkTimeUpdates) { |
| // Verify that the the tracker receives and properly handles updates to the |
| // network time. |
| base::Time out_network_time; |
| base::TimeDelta uncertainty; |
| |
| UpdateNetworkTime(clock_->Now() - latency_ / 2, resolution_, latency_, |
| tick_clock_->NowTicks()); |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_AVAILABLE, |
| tracker_->GetNetworkTime(&out_network_time, &uncertainty)); |
| EXPECT_EQ(clock_->Now(), out_network_time); |
| EXPECT_EQ(resolution_ + latency_ + adjustment_, uncertainty); |
| |
| // Fake a wait to make sure we keep tracking. |
| AdvanceBoth(base::TimeDelta::FromSeconds(1)); |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_AVAILABLE, |
| tracker_->GetNetworkTime(&out_network_time, &uncertainty)); |
| EXPECT_EQ(clock_->Now(), out_network_time); |
| EXPECT_EQ(resolution_ + latency_ + adjustment_, uncertainty); |
| |
| // And one more time. |
| UpdateNetworkTime(clock_->Now() - latency_ / 2, resolution_, latency_, |
| tick_clock_->NowTicks()); |
| AdvanceBoth(base::TimeDelta::FromSeconds(1)); |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_AVAILABLE, |
| tracker_->GetNetworkTime(&out_network_time, &uncertainty)); |
| EXPECT_EQ(clock_->Now(), out_network_time); |
| EXPECT_EQ(resolution_ + latency_ + adjustment_, uncertainty); |
| } |
| |
| TEST_F(NetworkTimeTrackerTest, SpringForward) { |
| base::HistogramTester histograms; |
| histograms.ExpectTotalCount(kClockDivergencePositiveHistogram, 0); |
| histograms.ExpectTotalCount(kClockDivergenceNegativeHistogram, 0); |
| histograms.ExpectTotalCount(kWallClockBackwardsHistogram, 0); |
| // Simulate the wall clock advancing faster than the tick clock. |
| UpdateNetworkTime(clock_->Now(), resolution_, latency_, |
| tick_clock_->NowTicks()); |
| tick_clock_->Advance(base::TimeDelta::FromSeconds(1)); |
| clock_->Advance(base::TimeDelta::FromDays(1)); |
| base::Time out_network_time; |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_SYNC_LOST, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| histograms.ExpectTotalCount(kClockDivergencePositiveHistogram, 0); |
| histograms.ExpectTotalCount(kClockDivergenceNegativeHistogram, 1); |
| histograms.ExpectTotalCount(kWallClockBackwardsHistogram, 0); |
| // The recorded clock divergence should be 1 second - 1 day in seconds. |
| histograms.ExpectBucketCount( |
| kClockDivergenceNegativeHistogram, |
| base::TimeDelta::FromSeconds(kOneDayInSeconds - 1).InMilliseconds(), 1); |
| } |
| |
| TEST_F(NetworkTimeTrackerTest, TickClockSpringsForward) { |
| base::HistogramTester histograms; |
| histograms.ExpectTotalCount(kClockDivergencePositiveHistogram, 0); |
| histograms.ExpectTotalCount(kClockDivergenceNegativeHistogram, 0); |
| histograms.ExpectTotalCount(kWallClockBackwardsHistogram, 0); |
| // Simulate the tick clock advancing faster than the wall clock. |
| UpdateNetworkTime(clock_->Now(), resolution_, latency_, |
| tick_clock_->NowTicks()); |
| tick_clock_->Advance(base::TimeDelta::FromDays(1)); |
| clock_->Advance(base::TimeDelta::FromSeconds(1)); |
| base::Time out_network_time; |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_SYNC_LOST, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| histograms.ExpectTotalCount(kClockDivergencePositiveHistogram, 1); |
| histograms.ExpectTotalCount(kClockDivergenceNegativeHistogram, 0); |
| histograms.ExpectTotalCount(kWallClockBackwardsHistogram, 0); |
| // The recorded clock divergence should be 1 day - 1 second. |
| histograms.ExpectBucketCount( |
| kClockDivergencePositiveHistogram, |
| base::TimeDelta::FromSeconds(kOneDayInSeconds - 1).InMilliseconds(), 1); |
| } |
| |
| TEST_F(NetworkTimeTrackerTest, FallBack) { |
| base::HistogramTester histograms; |
| histograms.ExpectTotalCount(kClockDivergencePositiveHistogram, 0); |
| histograms.ExpectTotalCount(kClockDivergenceNegativeHistogram, 0); |
| histograms.ExpectTotalCount(kWallClockBackwardsHistogram, 0); |
| // Simulate the wall clock running backward. |
| UpdateNetworkTime(clock_->Now(), resolution_, latency_, |
| tick_clock_->NowTicks()); |
| tick_clock_->Advance(base::TimeDelta::FromSeconds(1)); |
| clock_->Advance(base::TimeDelta::FromDays(-1)); |
| base::Time out_network_time; |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_SYNC_LOST, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| histograms.ExpectTotalCount(kClockDivergencePositiveHistogram, 0); |
| histograms.ExpectTotalCount(kClockDivergenceNegativeHistogram, 0); |
| histograms.ExpectTotalCount(kWallClockBackwardsHistogram, 1); |
| histograms.ExpectBucketCount( |
| kWallClockBackwardsHistogram, |
| base::TimeDelta::FromSeconds(kOneDayInSeconds - 1).InMilliseconds(), 1); |
| } |
| |
| TEST_F(NetworkTimeTrackerTest, SuspendAndResume) { |
| // Simulate the wall clock advancing while the tick clock stands still, as |
| // would happen in a suspend+resume cycle. |
| UpdateNetworkTime(clock_->Now(), resolution_, latency_, |
| tick_clock_->NowTicks()); |
| clock_->Advance(base::TimeDelta::FromHours(1)); |
| base::Time out_network_time; |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_SYNC_LOST, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| } |
| |
| TEST_F(NetworkTimeTrackerTest, Serialize) { |
| // Test that we can serialize and deserialize state and get consistent |
| // results. |
| base::Time in_network_time = clock_->Now() - base::TimeDelta::FromDays(90); |
| UpdateNetworkTime(in_network_time - latency_ / 2, resolution_, latency_, |
| tick_clock_->NowTicks()); |
| base::Time out_network_time; |
| base::TimeDelta out_uncertainty; |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_AVAILABLE, |
| tracker_->GetNetworkTime(&out_network_time, &out_uncertainty)); |
| EXPECT_EQ(in_network_time, out_network_time); |
| EXPECT_EQ(resolution_ + latency_ + adjustment_, out_uncertainty); |
| |
| // 6 days is just under the threshold for discarding data. |
| base::TimeDelta delta = base::TimeDelta::FromDays(6); |
| AdvanceBoth(delta); |
| Reset(); |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_AVAILABLE, |
| tracker_->GetNetworkTime(&out_network_time, &out_uncertainty)); |
| EXPECT_EQ(in_network_time + delta, out_network_time); |
| EXPECT_EQ(resolution_ + latency_ + adjustment_, out_uncertainty); |
| } |
| |
| TEST_F(NetworkTimeTrackerTest, DeserializeOldFormat) { |
| // Test that deserializing old data (which do not record the uncertainty and |
| // tick clock) causes the serialized data to be ignored. |
| base::Time in_network_time = clock_->Now() - base::TimeDelta::FromDays(90); |
| UpdateNetworkTime(in_network_time - latency_ / 2, resolution_, latency_, |
| tick_clock_->NowTicks()); |
| |
| base::Time out_network_time; |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_AVAILABLE, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| double local, network; |
| const base::DictionaryValue* saved_prefs = |
| pref_service_.GetDictionary(prefs::kNetworkTimeMapping); |
| saved_prefs->GetDouble("local", &local); |
| saved_prefs->GetDouble("network", &network); |
| base::DictionaryValue prefs; |
| prefs.SetDouble("local", local); |
| prefs.SetDouble("network", network); |
| pref_service_.Set(prefs::kNetworkTimeMapping, prefs); |
| Reset(); |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_NO_SYNC_ATTEMPT, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| } |
| |
| TEST_F(NetworkTimeTrackerTest, SerializeWithLongDelay) { |
| // Test that if the serialized data are more than a week old, they are |
| // discarded. |
| base::Time in_network_time = clock_->Now() - base::TimeDelta::FromDays(90); |
| UpdateNetworkTime(in_network_time - latency_ / 2, resolution_, latency_, |
| tick_clock_->NowTicks()); |
| base::Time out_network_time; |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_AVAILABLE, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| AdvanceBoth(base::TimeDelta::FromDays(8)); |
| Reset(); |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_NO_SYNC_ATTEMPT, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| } |
| |
| TEST_F(NetworkTimeTrackerTest, SerializeWithTickClockAdvance) { |
| // Test that serialized data are discarded if the wall clock and tick clock |
| // have not advanced consistently since data were serialized. |
| base::Time in_network_time = clock_->Now() - base::TimeDelta::FromDays(90); |
| UpdateNetworkTime(in_network_time - latency_ / 2, resolution_, latency_, |
| tick_clock_->NowTicks()); |
| base::Time out_network_time; |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_AVAILABLE, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| tick_clock_->Advance(base::TimeDelta::FromDays(1)); |
| Reset(); |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_SYNC_LOST, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| } |
| |
| TEST_F(NetworkTimeTrackerTest, SerializeWithWallClockAdvance) { |
| // Test that serialized data are discarded if the wall clock and tick clock |
| // have not advanced consistently since data were serialized. |
| base::Time in_network_time = clock_->Now() - base::TimeDelta::FromDays(90); |
| UpdateNetworkTime(in_network_time - latency_ / 2, resolution_, latency_, |
| tick_clock_->NowTicks()); |
| |
| base::Time out_network_time; |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_AVAILABLE, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| clock_->Advance(base::TimeDelta::FromDays(1)); |
| Reset(); |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_SYNC_LOST, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| } |
| |
| TEST_F(NetworkTimeTrackerTest, UpdateFromNetwork) { |
| base::HistogramTester histograms; |
| histograms.ExpectTotalCount(kFetchFailedHistogram, 0); |
| histograms.ExpectTotalCount(kFetchValidHistogram, 0); |
| |
| base::Time out_network_time; |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_NO_SYNC_ATTEMPT, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| // First query should happen soon. |
| EXPECT_EQ(base::TimeDelta::FromMinutes(0), |
| tracker_->GetTimerDelayForTesting()); |
| |
| test_server_->RegisterRequestHandler(base::Bind(&GoodTimeResponseHandler)); |
| EXPECT_TRUE(test_server_->Start()); |
| tracker_->SetTimeServerURLForTesting(test_server_->GetURL("/")); |
| EXPECT_TRUE(tracker_->QueryTimeServiceForTesting()); |
| tracker_->WaitForFetchForTesting(123123123); |
| |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_AVAILABLE, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| EXPECT_EQ(base::Time::UnixEpoch() + |
| base::TimeDelta::FromMilliseconds( |
| (uint64_t)kGoodTimeResponseHandlerJsTime[0]), |
| out_network_time); |
| // Should see no backoff in the success case. |
| EXPECT_EQ(base::TimeDelta::FromMinutes(60), |
| tracker_->GetTimerDelayForTesting()); |
| |
| histograms.ExpectTotalCount(kFetchFailedHistogram, 0); |
| histograms.ExpectTotalCount(kFetchValidHistogram, 1); |
| histograms.ExpectBucketCount(kFetchValidHistogram, true, 1); |
| } |
| |
| TEST_F(NetworkTimeTrackerTest, StartTimeFetch) { |
| test_server_->RegisterRequestHandler(base::Bind(&GoodTimeResponseHandler)); |
| EXPECT_TRUE(test_server_->Start()); |
| tracker_->SetTimeServerURLForTesting(test_server_->GetURL("/")); |
| |
| base::Time out_network_time; |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_NO_SYNC_ATTEMPT, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| |
| base::RunLoop run_loop; |
| EXPECT_TRUE(tracker_->StartTimeFetch(run_loop.QuitClosure())); |
| tracker_->WaitForFetchForTesting(123123123); |
| run_loop.Run(); |
| |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_AVAILABLE, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| EXPECT_EQ(base::Time::UnixEpoch() + |
| base::TimeDelta::FromMilliseconds( |
| (uint64_t)kGoodTimeResponseHandlerJsTime[0]), |
| out_network_time); |
| // Should see no backoff in the success case. |
| EXPECT_EQ(base::TimeDelta::FromMinutes(60), |
| tracker_->GetTimerDelayForTesting()); |
| } |
| |
| // Tests that when StartTimeFetch() is called with a query already in |
| // progress, it calls the callback when that query completes. |
| TEST_F(NetworkTimeTrackerTest, StartTimeFetchWithQueryInProgress) { |
| test_server_->RegisterRequestHandler(base::Bind(&GoodTimeResponseHandler)); |
| EXPECT_TRUE(test_server_->Start()); |
| tracker_->SetTimeServerURLForTesting(test_server_->GetURL("/")); |
| |
| base::Time out_network_time; |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_NO_SYNC_ATTEMPT, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| |
| EXPECT_TRUE(tracker_->QueryTimeServiceForTesting()); |
| |
| base::RunLoop run_loop; |
| EXPECT_TRUE(tracker_->StartTimeFetch(run_loop.QuitClosure())); |
| tracker_->WaitForFetchForTesting(123123123); |
| run_loop.Run(); |
| |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_AVAILABLE, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| EXPECT_EQ(base::Time::UnixEpoch() + |
| base::TimeDelta::FromMilliseconds( |
| (uint64_t)kGoodTimeResponseHandlerJsTime[0]), |
| out_network_time); |
| // Should see no backoff in the success case. |
| EXPECT_EQ(base::TimeDelta::FromMinutes(60), |
| tracker_->GetTimerDelayForTesting()); |
| } |
| |
| // Tests that StartTimeFetch() returns false if called while network |
| // time is available. |
| TEST_F(NetworkTimeTrackerTest, StartTimeFetchWhileSynced) { |
| test_server_->RegisterRequestHandler(base::Bind(&GoodTimeResponseHandler)); |
| EXPECT_TRUE(test_server_->Start()); |
| tracker_->SetTimeServerURLForTesting(test_server_->GetURL("/")); |
| |
| base::Time in_network_time = clock_->Now(); |
| UpdateNetworkTime(in_network_time, resolution_, latency_, |
| tick_clock_->NowTicks()); |
| |
| // No query should be started so long as NetworkTimeTracker is synced. |
| base::RunLoop run_loop; |
| EXPECT_FALSE(tracker_->StartTimeFetch(run_loop.QuitClosure())); |
| } |
| |
| // Tests that StartTimeFetch() returns false if the field trial |
| // is not configured to allow on-demand time fetches. |
| TEST_F(NetworkTimeTrackerTest, StartTimeFetchWithoutVariationsParam) { |
| field_trial_test_->SetNetworkQueriesWithVariationsService( |
| true, 0.0, NetworkTimeTracker::FETCHES_IN_BACKGROUND_ONLY); |
| test_server_->RegisterRequestHandler(base::Bind(&GoodTimeResponseHandler)); |
| EXPECT_TRUE(test_server_->Start()); |
| tracker_->SetTimeServerURLForTesting(test_server_->GetURL("/")); |
| |
| base::Time out_network_time; |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_NO_SYNC_ATTEMPT, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| |
| base::RunLoop run_loop; |
| EXPECT_FALSE(tracker_->StartTimeFetch(run_loop.QuitClosure())); |
| } |
| |
| TEST_F(NetworkTimeTrackerTest, NoNetworkQueryWhileSynced) { |
| test_server_->RegisterRequestHandler(base::Bind(&GoodTimeResponseHandler)); |
| EXPECT_TRUE(test_server_->Start()); |
| tracker_->SetTimeServerURLForTesting(test_server_->GetURL("/")); |
| |
| field_trial_test_->SetNetworkQueriesWithVariationsService( |
| true, 0.0, NetworkTimeTracker::FETCHES_IN_BACKGROUND_AND_ON_DEMAND); |
| base::Time in_network_time = clock_->Now(); |
| UpdateNetworkTime(in_network_time, resolution_, latency_, |
| tick_clock_->NowTicks()); |
| |
| // No query should be started so long as NetworkTimeTracker is synced, but the |
| // next check should happen soon. |
| EXPECT_FALSE(tracker_->QueryTimeServiceForTesting()); |
| EXPECT_EQ(base::TimeDelta::FromMinutes(6), |
| tracker_->GetTimerDelayForTesting()); |
| |
| field_trial_test_->SetNetworkQueriesWithVariationsService( |
| true, 1.0, NetworkTimeTracker::FETCHES_IN_BACKGROUND_AND_ON_DEMAND); |
| EXPECT_TRUE(tracker_->QueryTimeServiceForTesting()); |
| tracker_->WaitForFetchForTesting(123123123); |
| EXPECT_EQ(base::TimeDelta::FromMinutes(60), |
| tracker_->GetTimerDelayForTesting()); |
| } |
| |
| TEST_F(NetworkTimeTrackerTest, NoNetworkQueryWhileFeatureDisabled) { |
| // Disable network time queries and check that a query is not sent. |
| field_trial_test_->SetNetworkQueriesWithVariationsService( |
| false, 0.0, NetworkTimeTracker::FETCHES_IN_BACKGROUND_AND_ON_DEMAND); |
| EXPECT_FALSE(tracker_->QueryTimeServiceForTesting()); |
| // The timer is not started when the feature is disabled. |
| EXPECT_EQ(base::TimeDelta::FromMinutes(0), |
| tracker_->GetTimerDelayForTesting()); |
| |
| // Enable time queries and check that a query is sent. |
| field_trial_test_->SetNetworkQueriesWithVariationsService( |
| true, 0.0, NetworkTimeTracker::FETCHES_IN_BACKGROUND_AND_ON_DEMAND); |
| EXPECT_TRUE(tracker_->QueryTimeServiceForTesting()); |
| tracker_->WaitForFetchForTesting(123123123); |
| } |
| |
| TEST_F(NetworkTimeTrackerTest, UpdateFromNetworkBadSignature) { |
| base::HistogramTester histograms; |
| histograms.ExpectTotalCount(kFetchFailedHistogram, 0); |
| histograms.ExpectTotalCount(kFetchValidHistogram, 0); |
| |
| test_server_->RegisterRequestHandler( |
| base::Bind(&NetworkTimeTrackerTest::BadSignatureResponseHandler)); |
| EXPECT_TRUE(test_server_->Start()); |
| tracker_->SetTimeServerURLForTesting(test_server_->GetURL("/")); |
| EXPECT_TRUE(tracker_->QueryTimeServiceForTesting()); |
| tracker_->WaitForFetchForTesting(123123123); |
| |
| base::Time out_network_time; |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_NO_SUCCESSFUL_SYNC, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| EXPECT_EQ(base::TimeDelta::FromMinutes(120), |
| tracker_->GetTimerDelayForTesting()); |
| |
| histograms.ExpectTotalCount(kFetchFailedHistogram, 0); |
| histograms.ExpectTotalCount(kFetchValidHistogram, 1); |
| histograms.ExpectBucketCount(kFetchValidHistogram, false, 1); |
| } |
| |
| static const uint8_t kDevKeyPubBytes[] = { |
| 0x30, 0x59, 0x30, 0x13, 0x06, 0x07, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x02, |
| 0x01, 0x06, 0x08, 0x2a, 0x86, 0x48, 0xce, 0x3d, 0x03, 0x01, 0x07, 0x03, |
| 0x42, 0x00, 0x04, 0xe0, 0x6b, 0x0d, 0x76, 0x75, 0xa3, 0x99, 0x7d, 0x7c, |
| 0x1b, 0xd6, 0x3c, 0x73, 0xbb, 0x4b, 0xfe, 0x0a, 0xe7, 0x2f, 0x61, 0x3d, |
| 0x77, 0x0a, 0xaa, 0x14, 0xd8, 0x5a, 0xbf, 0x14, 0x60, 0xec, 0xf6, 0x32, |
| 0x77, 0xb5, 0xa7, 0xe6, 0x35, 0xa5, 0x61, 0xaf, 0xdc, 0xdf, 0x91, 0xce, |
| 0x45, 0x34, 0x5f, 0x36, 0x85, 0x2f, 0xb9, 0x53, 0x00, 0x5d, 0x86, 0xe7, |
| 0x04, 0x16, 0xe2, 0x3d, 0x21, 0x76, 0x2b}; |
| |
| TEST_F(NetworkTimeTrackerTest, UpdateFromNetworkBadData) { |
| base::HistogramTester histograms; |
| histograms.ExpectTotalCount(kFetchFailedHistogram, 0); |
| histograms.ExpectTotalCount(kFetchValidHistogram, 0); |
| |
| test_server_->RegisterRequestHandler( |
| base::Bind(&NetworkTimeTrackerTest::BadDataResponseHandler)); |
| EXPECT_TRUE(test_server_->Start()); |
| base::StringPiece key = {reinterpret_cast<const char*>(kDevKeyPubBytes), |
| sizeof(kDevKeyPubBytes)}; |
| tracker_->SetPublicKeyForTesting(key); |
| tracker_->SetTimeServerURLForTesting(test_server_->GetURL("/")); |
| EXPECT_TRUE(tracker_->QueryTimeServiceForTesting()); |
| tracker_->WaitForFetchForTesting(123123123); |
| base::Time out_network_time; |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_NO_SUCCESSFUL_SYNC, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| EXPECT_EQ(base::TimeDelta::FromMinutes(120), |
| tracker_->GetTimerDelayForTesting()); |
| |
| histograms.ExpectTotalCount(kFetchFailedHistogram, 0); |
| histograms.ExpectTotalCount(kFetchValidHistogram, 1); |
| histograms.ExpectBucketCount(kFetchValidHistogram, false, 1); |
| } |
| |
| TEST_F(NetworkTimeTrackerTest, UpdateFromNetworkServerError) { |
| base::HistogramTester histograms; |
| histograms.ExpectTotalCount(kFetchFailedHistogram, 0); |
| histograms.ExpectTotalCount(kFetchValidHistogram, 0); |
| |
| test_server_->RegisterRequestHandler( |
| base::Bind(&NetworkTimeTrackerTest::ServerErrorResponseHandler)); |
| EXPECT_TRUE(test_server_->Start()); |
| tracker_->SetTimeServerURLForTesting(test_server_->GetURL("/")); |
| EXPECT_TRUE(tracker_->QueryTimeServiceForTesting()); |
| tracker_->WaitForFetchForTesting(123123123); |
| |
| base::Time out_network_time; |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_NO_SUCCESSFUL_SYNC, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| // Should see backoff in the error case. |
| EXPECT_EQ(base::TimeDelta::FromMinutes(120), |
| tracker_->GetTimerDelayForTesting()); |
| |
| histograms.ExpectTotalCount(kFetchFailedHistogram, 1); |
| // There was no network error, so the histogram is recorded as |
| // net::OK, indicating that the connection succeeded but there was a |
| // non-200 HTTP status code. |
| histograms.ExpectBucketCount(kFetchFailedHistogram, net::OK, 1); |
| histograms.ExpectTotalCount(kFetchValidHistogram, 0); |
| } |
| |
| #if defined(OS_IOS) |
| // http://crbug.com/658619 |
| #define MAYBE_UpdateFromNetworkNetworkError \ |
| DISABLED_UpdateFromNetworkNetworkError |
| #else |
| #define MAYBE_UpdateFromNetworkNetworkError UpdateFromNetworkNetworkError |
| #endif |
| TEST_F(NetworkTimeTrackerTest, MAYBE_UpdateFromNetworkNetworkError) { |
| base::HistogramTester histograms; |
| histograms.ExpectTotalCount(kFetchFailedHistogram, 0); |
| histograms.ExpectTotalCount(kFetchValidHistogram, 0); |
| |
| test_server_->RegisterRequestHandler( |
| base::Bind(&NetworkTimeTrackerTest::NetworkErrorResponseHandler)); |
| EXPECT_TRUE(test_server_->Start()); |
| tracker_->SetTimeServerURLForTesting(test_server_->GetURL("/")); |
| EXPECT_TRUE(tracker_->QueryTimeServiceForTesting()); |
| tracker_->WaitForFetchForTesting(123123123); |
| |
| base::Time out_network_time; |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_NO_SUCCESSFUL_SYNC, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| // Should see backoff in the error case. |
| EXPECT_EQ(base::TimeDelta::FromMinutes(120), |
| tracker_->GetTimerDelayForTesting()); |
| |
| histograms.ExpectTotalCount(kFetchFailedHistogram, 1); |
| histograms.ExpectBucketCount(kFetchFailedHistogram, -net::ERR_EMPTY_RESPONSE, |
| 1); |
| histograms.ExpectTotalCount(kFetchValidHistogram, 0); |
| } |
| |
| TEST_F(NetworkTimeTrackerTest, UpdateFromNetworkLargeResponse) { |
| base::HistogramTester histograms; |
| histograms.ExpectTotalCount(kFetchFailedHistogram, 0); |
| histograms.ExpectTotalCount(kFetchValidHistogram, 0); |
| |
| test_server_->RegisterRequestHandler(base::Bind(&GoodTimeResponseHandler)); |
| EXPECT_TRUE(test_server_->Start()); |
| tracker_->SetTimeServerURLForTesting(test_server_->GetURL("/")); |
| |
| base::Time out_network_time; |
| |
| tracker_->SetMaxResponseSizeForTesting(3); |
| EXPECT_TRUE(tracker_->QueryTimeServiceForTesting()); |
| tracker_->WaitForFetchForTesting(123123123); |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_NO_SUCCESSFUL_SYNC, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| |
| histograms.ExpectTotalCount(kFetchFailedHistogram, 1); |
| histograms.ExpectTotalCount(kFetchValidHistogram, 0); |
| |
| tracker_->SetMaxResponseSizeForTesting(1024); |
| EXPECT_TRUE(tracker_->QueryTimeServiceForTesting()); |
| tracker_->WaitForFetchForTesting(123123123); |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_AVAILABLE, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| |
| histograms.ExpectTotalCount(kFetchFailedHistogram, 1); |
| histograms.ExpectTotalCount(kFetchValidHistogram, 1); |
| histograms.ExpectBucketCount(kFetchValidHistogram, true, 1); |
| } |
| |
| TEST_F(NetworkTimeTrackerTest, UpdateFromNetworkFirstSyncPending) { |
| base::HistogramTester histograms; |
| histograms.ExpectTotalCount(kFetchFailedHistogram, 0); |
| histograms.ExpectTotalCount(kFetchValidHistogram, 0); |
| |
| test_server_->RegisterRequestHandler( |
| base::Bind(&NetworkTimeTrackerTest::BadDataResponseHandler)); |
| EXPECT_TRUE(test_server_->Start()); |
| base::StringPiece key = {reinterpret_cast<const char*>(kDevKeyPubBytes), |
| sizeof(kDevKeyPubBytes)}; |
| tracker_->SetPublicKeyForTesting(key); |
| tracker_->SetTimeServerURLForTesting(test_server_->GetURL("/")); |
| EXPECT_TRUE(tracker_->QueryTimeServiceForTesting()); |
| |
| // Do not wait for the fetch to complete; ask for the network time |
| // immediately while the request is still pending. |
| base::Time out_network_time; |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_FIRST_SYNC_PENDING, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| histograms.ExpectTotalCount(kFetchFailedHistogram, 0); |
| histograms.ExpectTotalCount(kFetchValidHistogram, 0); |
| |
| tracker_->WaitForFetchForTesting(123123123); |
| } |
| |
| TEST_F(NetworkTimeTrackerTest, UpdateFromNetworkSubseqeuntSyncPending) { |
| base::HistogramTester histograms; |
| histograms.ExpectTotalCount(kFetchFailedHistogram, 0); |
| histograms.ExpectTotalCount(kFetchValidHistogram, 0); |
| |
| test_server_->RegisterRequestHandler( |
| base::Bind(&NetworkTimeTrackerTest::BadDataResponseHandler)); |
| EXPECT_TRUE(test_server_->Start()); |
| base::StringPiece key = {reinterpret_cast<const char*>(kDevKeyPubBytes), |
| sizeof(kDevKeyPubBytes)}; |
| tracker_->SetPublicKeyForTesting(key); |
| tracker_->SetTimeServerURLForTesting(test_server_->GetURL("/")); |
| EXPECT_TRUE(tracker_->QueryTimeServiceForTesting()); |
| tracker_->WaitForFetchForTesting(123123123); |
| |
| base::Time out_network_time; |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_NO_SUCCESSFUL_SYNC, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| |
| // After one sync attempt failed, kick off another one, and ask for |
| // the network time while it is still pending. |
| EXPECT_TRUE(tracker_->QueryTimeServiceForTesting()); |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_SUBSEQUENT_SYNC_PENDING, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| histograms.ExpectTotalCount(kFetchFailedHistogram, 0); |
| histograms.ExpectTotalCount(kFetchValidHistogram, 1); |
| histograms.ExpectBucketCount(kFetchValidHistogram, false, 1); |
| |
| tracker_->WaitForFetchForTesting(123123123); |
| } |
| |
| namespace { |
| |
| // NetworkTimeTrackerTest.TimeBetweenFetchesHistogram needs to make several time |
| // queries that return different times. MultipleGoodTimeResponseHandler is like |
| // GoodTimeResponseHandler, but returning different times on each of three |
| // requests that happen in sequence. |
| // |
| // See comments inline for how to update the times that are returned. |
| class MultipleGoodTimeResponseHandler { |
| public: |
| MultipleGoodTimeResponseHandler() {} |
| ~MultipleGoodTimeResponseHandler() {} |
| |
| std::unique_ptr<net::test_server::HttpResponse> ResponseHandler( |
| const net::test_server::HttpRequest& request); |
| |
| // Returns the time that is returned in the (i-1)'th response handled by |
| // ResponseHandler(), or null base::Time() if too many responses have been |
| // handled. |
| base::Time GetTimeAtIndex(unsigned int i); |
| |
| private: |
| // The index into |kGoodTimeResponseHandlerJsTime|, |kGoodTimeResponseBody|, |
| // and |kGoodTimeResponseServerProofHeaders| that will be used in the |
| // response in the next ResponseHandler() call. |
| unsigned int next_time_index_ = 0; |
| |
| DISALLOW_COPY_AND_ASSIGN(MultipleGoodTimeResponseHandler); |
| }; |
| |
| std::unique_ptr<net::test_server::HttpResponse> |
| MultipleGoodTimeResponseHandler::ResponseHandler( |
| const net::test_server::HttpRequest& request) { |
| net::test_server::BasicHttpResponse* response = |
| new net::test_server::BasicHttpResponse(); |
| |
| if (next_time_index_ >= base::size(kGoodTimeResponseBody)) { |
| response->set_code(net::HTTP_BAD_REQUEST); |
| return std::unique_ptr<net::test_server::HttpResponse>(response); |
| } |
| |
| response->set_code(net::HTTP_OK); |
| response->set_content(kGoodTimeResponseBody[next_time_index_]); |
| response->AddCustomHeader( |
| "x-cup-server-proof", |
| kGoodTimeResponseServerProofHeader[next_time_index_]); |
| next_time_index_++; |
| return std::unique_ptr<net::test_server::HttpResponse>(response); |
| } |
| |
| base::Time MultipleGoodTimeResponseHandler::GetTimeAtIndex(unsigned int i) { |
| if (i >= base::size(kGoodTimeResponseHandlerJsTime)) |
| return base::Time(); |
| return base::Time::FromJsTime(kGoodTimeResponseHandlerJsTime[i]); |
| } |
| |
| } // namespace |
| |
| TEST_F(NetworkTimeTrackerTest, TimeBetweenFetchesHistogram) { |
| MultipleGoodTimeResponseHandler response_handler; |
| base::HistogramTester histograms; |
| histograms.ExpectTotalCount(kTimeBetweenFetchesHistogram, 0); |
| |
| test_server_->RegisterRequestHandler( |
| base::Bind(&MultipleGoodTimeResponseHandler::ResponseHandler, |
| base::Unretained(&response_handler))); |
| EXPECT_TRUE(test_server_->Start()); |
| tracker_->SetTimeServerURLForTesting(test_server_->GetURL("/")); |
| EXPECT_TRUE(tracker_->QueryTimeServiceForTesting()); |
| tracker_->WaitForFetchForTesting(123123123); |
| |
| base::Time out_network_time; |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_AVAILABLE, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| // After the first query, there should be no histogram value because |
| // there was no delta to record. |
| histograms.ExpectTotalCount(kTimeBetweenFetchesHistogram, 0); |
| |
| // Trigger a second query, which should cause the delta from the first |
| // query to be recorded. |
| clock_->Advance(base::TimeDelta::FromHours(1)); |
| EXPECT_TRUE(tracker_->QueryTimeServiceForTesting()); |
| tracker_->WaitForFetchForTesting(123123123); |
| EXPECT_EQ(NetworkTimeTracker::NETWORK_TIME_AVAILABLE, |
| tracker_->GetNetworkTime(&out_network_time, nullptr)); |
| histograms.ExpectTotalCount(kTimeBetweenFetchesHistogram, 1); |
| histograms.ExpectBucketCount( |
| kTimeBetweenFetchesHistogram, |
| (response_handler.GetTimeAtIndex(1) - response_handler.GetTimeAtIndex(0)) |
| .InMilliseconds(), |
| 1); |
| } |
| |
| } // namespace network_time |