1//===-- Unittests for gmtime_r --------------------------------------------===//
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/time/gmtime_r.h"
10#include "src/time/time_utils.h"
11#include "test/UnitTest/Test.h"
12#include "test/src/time/TmMatcher.h"
13
14using LIBC_NAMESPACE::time_utils::TimeConstants;
15
16// gmtime and gmtime_r share the same code and thus didn't repeat all the tests
17// from gmtime. Added couple of validation tests.
18TEST(LlvmLibcGmTimeR, EndOf32BitEpochYear) {
19 // Test for maximum value of a signed 32-bit integer.
20 // Test implementation can encode time for Tue 19 January 2038 03:14:07 UTC.
21 time_t seconds = 0x7FFFFFFF;
22 struct tm tm_data;
23 struct tm *tm_data_ptr;
24 tm_data_ptr = LIBC_NAMESPACE::gmtime_r(timer: &seconds, result: &tm_data);
25 EXPECT_TM_EQ((tm{7, // sec
26 14, // min
27 3, // hr
28 19, // day
29 0, // tm_mon starts with 0 for Jan
30 2038 - TimeConstants::TIME_YEAR_BASE, // year
31 2, // wday
32 7, // yday
33 0}),
34 *tm_data_ptr);
35 EXPECT_TM_EQ(*tm_data_ptr, tm_data);
36}
37
38TEST(LlvmLibcGmTimeR, Max64BitYear) {
39 if (sizeof(time_t) == 4)
40 return;
41 // Test for Tue Jan 1 12:50:50 in 2,147,483,647th year.
42 time_t seconds = 67767976202043050;
43 struct tm tm_data;
44 struct tm *tm_data_ptr;
45 tm_data_ptr = LIBC_NAMESPACE::gmtime_r(timer: &seconds, result: &tm_data);
46 EXPECT_TM_EQ((tm{50, // sec
47 50, // min
48 12, // hr
49 1, // day
50 0, // tm_mon starts with 0 for Jan
51 2147483647 - TimeConstants::TIME_YEAR_BASE, // year
52 2, // wday
53 50, // yday
54 0}),
55 *tm_data_ptr);
56 EXPECT_TM_EQ(*tm_data_ptr, tm_data);
57}
58

source code of libc/test/src/time/gmtime_r_test.cpp