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 | |
24 | static constexpr auto kAcceptableDeltaSecs = std::chrono::seconds(120); |
25 | |
26 | using folly::test::AreWithinSecs; |
27 | |
28 | #ifdef CLOCK_REALTIME |
29 | |
30 | TEST(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 | |
43 | TEST(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 | |