1 //===-- unit tests for linux's timeout utilities --------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "src/__support/CPP/expected.h"
10 #include "src/__support/time/linux/abs_timeout.h"
11 #include "src/__support/time/linux/monotonicity.h"
12 #include "test/UnitTest/Test.h"
13
14 template <class T, class E>
15 using expected = LIBC_NAMESPACE::cpp::expected<T, E>;
16 using AbsTimeout = LIBC_NAMESPACE::internal::AbsTimeout;
17
TEST(LlvmLibcSupportLinuxTimeoutTest,NegativeSecond)18 TEST(LlvmLibcSupportLinuxTimeoutTest, NegativeSecond) {
19 timespec ts = {-1, 0};
20 expected<AbsTimeout, AbsTimeout::Error> result =
21 AbsTimeout::from_timespec(ts, false);
22 ASSERT_FALSE(result.has_value());
23 ASSERT_EQ(result.error(), AbsTimeout::Error::BeforeEpoch);
24 }
TEST(LlvmLibcSupportLinuxTimeoutTest,OverflowNano)25 TEST(LlvmLibcSupportLinuxTimeoutTest, OverflowNano) {
26 using namespace LIBC_NAMESPACE::time_units;
27 timespec ts = {0, 2_s_ns};
28 expected<AbsTimeout, AbsTimeout::Error> result =
29 AbsTimeout::from_timespec(ts, false);
30 ASSERT_FALSE(result.has_value());
31 ASSERT_EQ(result.error(), AbsTimeout::Error::Invalid);
32 }
TEST(LlvmLibcSupportLinuxTimeoutTest,UnderflowNano)33 TEST(LlvmLibcSupportLinuxTimeoutTest, UnderflowNano) {
34 timespec ts = {0, -1};
35 expected<AbsTimeout, AbsTimeout::Error> result =
36 AbsTimeout::from_timespec(ts, false);
37 ASSERT_FALSE(result.has_value());
38 ASSERT_EQ(result.error(), AbsTimeout::Error::Invalid);
39 }
TEST(LlvmLibcSupportLinuxTimeoutTest,NoChangeIfClockIsMonotonic)40 TEST(LlvmLibcSupportLinuxTimeoutTest, NoChangeIfClockIsMonotonic) {
41 timespec ts = {10000, 0};
42 expected<AbsTimeout, AbsTimeout::Error> result =
43 AbsTimeout::from_timespec(ts, false);
44 ASSERT_TRUE(result.has_value());
45 ensure_monotonicity(*result);
46 ASSERT_FALSE(result->is_realtime());
47 ASSERT_EQ(result->get_timespec().tv_sec, static_cast<time_t>(10000));
48 ASSERT_EQ(result->get_timespec().tv_nsec, static_cast<long int>(0));
49 }
TEST(LlvmLibcSupportLinuxTimeoutTest,ValidAfterConversion)50 TEST(LlvmLibcSupportLinuxTimeoutTest, ValidAfterConversion) {
51 timespec ts;
52 LIBC_NAMESPACE::internal::clock_gettime(CLOCK_REALTIME, &ts);
53 expected<AbsTimeout, AbsTimeout::Error> result =
54 AbsTimeout::from_timespec(ts, true);
55 ASSERT_TRUE(result.has_value());
56 ensure_monotonicity(*result);
57 ASSERT_FALSE(result->is_realtime());
58 ASSERT_TRUE(
59 AbsTimeout::from_timespec(result->get_timespec(), false).has_value());
60 }
61