libc/test/src/time/gmtime_r_test.cpp

   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
  14 using 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.
  18 TEST(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(&seconds, &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
  38 TEST(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(&seconds, &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 }