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/*
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "system_wrappers/include/clock.h"
#include "api/units/time_delta.h"
#include "test/gtest.h"
namespace webrtc {
TEST(ClockTest, NtpTime) {
Clock* clock = Clock::GetRealTimeClock();
// To ensure the test runs correctly even on a heavily loaded system, do not
// compare the seconds/fractions and millisecond values directly. Instead,
// we check that the NTP time is between the "milliseconds" values returned
// right before and right after the call.
// The comparison includes 1 ms of margin to account for the rounding error in
// the conversion.
int64_t milliseconds_lower_bound = clock->CurrentNtpInMilliseconds();
NtpTime ntp_time = clock->CurrentNtpTime();
int64_t milliseconds_upper_bound = clock->CurrentNtpInMilliseconds();
EXPECT_GT(milliseconds_lower_bound / 1000, kNtpJan1970);
EXPECT_LE(milliseconds_lower_bound - 1, ntp_time.ToMs());
EXPECT_GE(milliseconds_upper_bound + 1, ntp_time.ToMs());
}
TEST(ClockTest, NtpToUtc) {
Clock* clock = Clock::GetRealTimeClock();
NtpTime ntp = clock->CurrentNtpTime();
Timestamp a = Clock::NtpToUtc(ntp);
Timestamp b = Timestamp::Millis(ntp.ToMs() - int64_t{kNtpJan1970} * 1000);
TimeDelta d = a - b;
EXPECT_LT(d.Abs(), TimeDelta::Millis(1));
}
} // namespace webrtc
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