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/*
* Copyright (c) 2021, Brian Gianforcaro <bgianf@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/StringView.h>
#include <LibTest/TestCase.h>
#include <time.h>
auto const expected_epoch = "Thu Jan 1 00:00:00 1970\n"sv;
class TimeZoneGuard {
public:
TimeZoneGuard()
: m_tz(getenv("TZ"))
{
}
explicit TimeZoneGuard(char const* tz)
: m_tz(getenv("TZ"))
{
setenv("TZ", tz, 1);
}
~TimeZoneGuard()
{
if (m_tz)
setenv("TZ", m_tz, 1);
else
unsetenv("TZ");
}
private:
char const* m_tz { nullptr };
};
TEST_CASE(asctime)
{
TimeZoneGuard guard("UTC");
time_t epoch = 0;
auto result = asctime(localtime(&epoch));
EXPECT_EQ(expected_epoch, StringView(result));
}
TEST_CASE(asctime_r)
{
TimeZoneGuard guard("UTC");
char buffer[26] {};
time_t epoch = 0;
auto result = asctime_r(localtime(&epoch), buffer);
EXPECT_EQ(expected_epoch, StringView(result));
}
TEST_CASE(ctime)
{
TimeZoneGuard guard("UTC");
time_t epoch = 0;
auto result = ctime(&epoch);
EXPECT_EQ(expected_epoch, StringView(result));
}
TEST_CASE(ctime_r)
{
TimeZoneGuard guard("UTC");
char buffer[26] {};
time_t epoch = 0;
auto result = ctime_r(&epoch, buffer);
EXPECT_EQ(expected_epoch, StringView(result));
}
TEST_CASE(tzset)
{
TimeZoneGuard guard;
auto set_tz = [](char const* tz) {
setenv("TZ", tz, 1);
tzset();
};
set_tz("UTC");
EXPECT_EQ(timezone, 0);
EXPECT_EQ(altzone, 0);
EXPECT_EQ(daylight, 0);
EXPECT_EQ(tzname[0], "UTC"sv);
EXPECT_EQ(tzname[1], "UTC"sv);
set_tz("America/New_York");
EXPECT_EQ(timezone, 5 * 60 * 60);
EXPECT_EQ(altzone, 4 * 60 * 60);
EXPECT_EQ(daylight, 1);
EXPECT_EQ(tzname[0], "EST"sv);
EXPECT_EQ(tzname[1], "EDT"sv);
set_tz("America/Phoenix");
EXPECT_EQ(timezone, 7 * 60 * 60);
EXPECT_EQ(altzone, 7 * 60 * 60);
EXPECT_EQ(daylight, 0);
EXPECT_EQ(tzname[0], "MST"sv);
EXPECT_EQ(tzname[1], "MST"sv);
set_tz("America/Asuncion");
EXPECT_EQ(timezone, 4 * 60 * 60);
EXPECT_EQ(altzone, 3 * 60 * 60);
EXPECT_EQ(daylight, 1);
EXPECT_EQ(tzname[0], "-04"sv);
EXPECT_EQ(tzname[1], "-03"sv);
set_tz("CET");
EXPECT_EQ(timezone, -1 * 60 * 60);
EXPECT_EQ(altzone, -2 * 60 * 60);
EXPECT_EQ(daylight, 1);
EXPECT_EQ(tzname[0], "CET"sv);
EXPECT_EQ(tzname[1], "CEST"sv);
}
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