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//===-- Unittests for asctime ---------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "src/errno/libc_errno.h"
#include "src/time/asctime.h"
#include "test/UnitTest/Test.h"
#include "test/src/time/TmHelper.h"
static inline char *call_asctime(struct tm *tm_data, int year, int month,
int mday, int hour, int min, int sec, int wday,
int yday) {
__llvm_libc::tmhelper::testing::initialize_tm_data(
tm_data, year, month, mday, hour, min, sec, wday, yday);
return __llvm_libc::asctime(tm_data);
}
TEST(LlvmLibcAsctime, Nullptr) {
char *result;
result = __llvm_libc::asctime(nullptr);
ASSERT_EQ(EINVAL, libc_errno);
ASSERT_STREQ(nullptr, result);
}
// Weekdays are in the range 0 to 6. Test passing invalid value in wday.
TEST(LlvmLibcAsctime, InvalidWday) {
struct tm tm_data;
// Test with wday = -1.
call_asctime(&tm_data,
1970, // year
1, // month
1, // day
0, // hr
0, // min
0, // sec
-1, // wday
0); // yday
ASSERT_EQ(EINVAL, libc_errno);
// Test with wday = 7.
call_asctime(&tm_data,
1970, // year
1, // month
1, // day
0, // hr
0, // min
0, // sec
7, // wday
0); // yday
ASSERT_EQ(EINVAL, libc_errno);
}
// Months are from January to December. Test passing invalid value in month.
TEST(LlvmLibcAsctime, InvalidMonth) {
struct tm tm_data;
// Test with month = 0.
call_asctime(&tm_data,
1970, // year
0, // month
1, // day
0, // hr
0, // min
0, // sec
4, // wday
0); // yday
ASSERT_EQ(EINVAL, libc_errno);
// Test with month = 13.
call_asctime(&tm_data,
1970, // year
13, // month
1, // day
0, // hr
0, // min
0, // sec
4, // wday
0); // yday
ASSERT_EQ(EINVAL, libc_errno);
}
TEST(LlvmLibcAsctime, ValidWeekdays) {
struct tm tm_data;
char *result;
// 1970-01-01 00:00:00.
result = call_asctime(&tm_data,
1970, // year
1, // month
1, // day
0, // hr
0, // min
0, // sec
4, // wday
0); // yday
ASSERT_STREQ("Thu Jan 1 00:00:00 1970\n", result);
// 1970-01-03 00:00:00.
result = call_asctime(&tm_data,
1970, // year
1, // month
3, // day
0, // hr
0, // min
0, // sec
6, // wday
0); // yday
ASSERT_STREQ("Sat Jan 3 00:00:00 1970\n", result);
// 1970-01-04 00:00:00.
result = call_asctime(&tm_data,
1970, // year
1, // month
4, // day
0, // hr
0, // min
0, // sec
0, // wday
0); // yday
ASSERT_STREQ("Sun Jan 4 00:00:00 1970\n", result);
}
TEST(LlvmLibcAsctime, ValidMonths) {
struct tm tm_data;
char *result;
// 1970-01-01 00:00:00.
result = call_asctime(&tm_data,
1970, // year
1, // month
1, // day
0, // hr
0, // min
0, // sec
4, // wday
0); // yday
ASSERT_STREQ("Thu Jan 1 00:00:00 1970\n", result);
// 1970-02-01 00:00:00.
result = call_asctime(&tm_data,
1970, // year
2, // month
1, // day
0, // hr
0, // min
0, // sec
0, // wday
0); // yday
ASSERT_STREQ("Sun Feb 1 00:00:00 1970\n", result);
// 1970-12-31 23:59:59.
result = call_asctime(&tm_data,
1970, // year
12, // month
31, // day
23, // hr
59, // min
59, // sec
4, // wday
0); // yday
ASSERT_STREQ("Thu Dec 31 23:59:59 1970\n", result);
}
TEST(LlvmLibcAsctime, EndOf32BitEpochYear) {
struct tm tm_data;
char *result;
// Test for maximum value of a signed 32-bit integer.
// Test implementation can encode time for Tue 19 January 2038 03:14:07 UTC.
result = call_asctime(&tm_data,
2038, // year
1, // month
19, // day
3, // hr
14, // min
7, // sec
2, // wday
7); // yday
ASSERT_STREQ("Tue Jan 19 03:14:07 2038\n", result);
}
TEST(LlvmLibcAsctime, Max64BitYear) {
if (sizeof(time_t) == 4)
return;
// Mon Jan 1 12:50:50 2170 (200 years from 1970),
struct tm tm_data;
char *result;
result = call_asctime(&tm_data,
2170, // year
1, // month
1, // day
12, // hr
50, // min
50, // sec
1, // wday
50); // yday
ASSERT_STREQ("Mon Jan 1 12:50:50 2170\n", result);
// Test for Tue Jan 1 12:50:50 in 2,147,483,647th year.
// This test would cause buffer overflow and thus asctime returns nullptr.
result = call_asctime(&tm_data,
2147483647, // year
1, // month
1, // day
12, // hr
50, // min
50, // sec
2, // wday
50); // yday
ASSERT_EQ(EOVERFLOW, libc_errno);
ASSERT_STREQ(nullptr, result);
}
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