| /* |
| * 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 "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()); |
| } |
| |
| } // namespace webrtc |