1/*
2 * Copyright 2016-present Facebook, Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <folly/ClockGettimeWrappers.h>
18
19#include <chrono>
20
21#include <folly/portability/GTest.h>
22#include <folly/test/TestUtils.h>
23
24static constexpr auto kAcceptableDeltaSecs = std::chrono::seconds(120);
25
26using folly::test::AreWithinSecs;
27
28#ifdef CLOCK_REALTIME
29
30TEST(ClockGettimeWrappers, clockGettimeWrapperIsWithin120SecsOfSystemClock) {
31 struct timespec ts;
32 auto ret = folly::chrono::clock_gettime(CLOCK_REALTIME, &ts);
33 ASSERT_EQ(0, ret);
34
35 auto gettimeResult =
36 std::chrono::seconds(ts.tv_sec) + std::chrono::nanoseconds(ts.tv_nsec);
37 auto stdChronoSystemClockNow =
38 std::chrono::system_clock::now().time_since_epoch();
39 ASSERT_TRUE(AreWithinSecs(
40 gettimeResult, stdChronoSystemClockNow, kAcceptableDeltaSecs));
41}
42
43TEST(ClockGettimeWrappers, clockGettimeNsWrapperIsWithin120SecsOfSystemClock) {
44 auto now_ns = folly::chrono::clock_gettime_ns(CLOCK_REALTIME);
45 auto stdChronoSystemClockNow =
46 std::chrono::system_clock::now().time_since_epoch();
47 ASSERT_TRUE(AreWithinSecs(
48 std::chrono::nanoseconds(now_ns),
49 stdChronoSystemClockNow,
50 kAcceptableDeltaSecs));
51}
52
53#endif /* CLOCK_REALTIME */
54