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network_time_tracker_unittest.cc
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network_time_tracker_unittest.cc
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// 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/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