src/test/test-time.c - systemd-stable - Rivoreo Source Code Repositories

 /***
   This file is part of systemd.

   Copyright 2013 Lennart Poettering

   systemd is free software; you can redistribute it and/or modify it
   under the terms of the GNU Lesser General Public License as published by
   the Free Software Foundation; either version 2.1 of the License, or
   (at your option) any later version.

   systemd is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/

 #include "random-util.h"
 #include "string-util.h"
 #include "strv.h"
 #include "time-util.h"

 static void test_parse_sec(void) {
         usec_t u;

         assert_se(parse_sec("5s", &u) >= 0);
         assert_se(u == 5 * USEC_PER_SEC);
         assert_se(parse_sec("5s500ms", &u) >= 0);
         assert_se(u == 5 * USEC_PER_SEC + 500 * USEC_PER_MSEC);
         assert_se(parse_sec(" 5s 500ms  ", &u) >= 0);
         assert_se(u == 5 * USEC_PER_SEC + 500 * USEC_PER_MSEC);
         assert_se(parse_sec(" 5.5s  ", &u) >= 0);
         assert_se(u == 5 * USEC_PER_SEC + 500 * USEC_PER_MSEC);
         assert_se(parse_sec(" 5.5s 0.5ms ", &u) >= 0);
         assert_se(u == 5 * USEC_PER_SEC + 500 * USEC_PER_MSEC + 500);
         assert_se(parse_sec(" .22s ", &u) >= 0);
         assert_se(u == 220 * USEC_PER_MSEC);
         assert_se(parse_sec(" .50y ", &u) >= 0);
         assert_se(u == USEC_PER_YEAR / 2);
         assert_se(parse_sec("2.5", &u) >= 0);
         assert_se(u == 2500 * USEC_PER_MSEC);
         assert_se(parse_sec(".7", &u) >= 0);
         assert_se(u == 700 * USEC_PER_MSEC);
         assert_se(parse_sec("23us", &u) >= 0);
         assert_se(u == 23);
         assert_se(parse_sec("23µs", &u) >= 0);
         assert_se(u == 23);
         assert_se(parse_sec("infinity", &u) >= 0);
         assert_se(u == USEC_INFINITY);
         assert_se(parse_sec(" infinity ", &u) >= 0);
         assert_se(u == USEC_INFINITY);

         assert_se(parse_sec(" xyz ", &u) < 0);
         assert_se(parse_sec("", &u) < 0);
         assert_se(parse_sec(" . ", &u) < 0);
         assert_se(parse_sec(" 5. ", &u) < 0);
         assert_se(parse_sec(".s ", &u) < 0);
         assert_se(parse_sec(" infinity .7", &u) < 0);
         assert_se(parse_sec(".3 infinity", &u) < 0);
 }

 static void test_parse_time(void) {
         usec_t u;

         assert_se(parse_time("5", &u, 1) >= 0);
         assert_se(u == 5);

         assert_se(parse_time("5", &u, USEC_PER_MSEC) >= 0);
         assert_se(u == 5 * USEC_PER_MSEC);

         assert_se(parse_time("5", &u, USEC_PER_SEC) >= 0);
         assert_se(u == 5 * USEC_PER_SEC);

         assert_se(parse_time("5s", &u, 1) >= 0);
         assert_se(u == 5 * USEC_PER_SEC);

         assert_se(parse_time("5s", &u, USEC_PER_SEC) >= 0);
         assert_se(u == 5 * USEC_PER_SEC);

         assert_se(parse_time("5s", &u, USEC_PER_MSEC) >= 0);
         assert_se(u == 5 * USEC_PER_SEC);
 }

 static void test_parse_nsec(void) {
         nsec_t u;

         assert_se(parse_nsec("5s", &u) >= 0);
         assert_se(u == 5 * NSEC_PER_SEC);
         assert_se(parse_nsec("5s500ms", &u) >= 0);
         assert_se(u == 5 * NSEC_PER_SEC + 500 * NSEC_PER_MSEC);
         assert_se(parse_nsec(" 5s 500ms  ", &u) >= 0);
         assert_se(u == 5 * NSEC_PER_SEC + 500 * NSEC_PER_MSEC);
         assert_se(parse_nsec(" 5.5s  ", &u) >= 0);
         assert_se(u == 5 * NSEC_PER_SEC + 500 * NSEC_PER_MSEC);
         assert_se(parse_nsec(" 5.5s 0.5ms ", &u) >= 0);
         assert_se(u == 5 * NSEC_PER_SEC + 500 * NSEC_PER_MSEC + 500 * NSEC_PER_USEC);
         assert_se(parse_nsec(" .22s ", &u) >= 0);
         assert_se(u == 220 * NSEC_PER_MSEC);
         assert_se(parse_nsec(" .50y ", &u) >= 0);
         assert_se(u == NSEC_PER_YEAR / 2);
         assert_se(parse_nsec("2.5", &u) >= 0);
         assert_se(u == 2);
         assert_se(parse_nsec(".7", &u) >= 0);
         assert_se(u == 0);
         assert_se(parse_nsec("infinity", &u) >= 0);
         assert_se(u == NSEC_INFINITY);
         assert_se(parse_nsec(" infinity ", &u) >= 0);
         assert_se(u == NSEC_INFINITY);

         assert_se(parse_nsec(" xyz ", &u) < 0);
         assert_se(parse_nsec("", &u) < 0);
         assert_se(parse_nsec(" . ", &u) < 0);
         assert_se(parse_nsec(" 5. ", &u) < 0);
         assert_se(parse_nsec(".s ", &u) < 0);
         assert_se(parse_nsec(" infinity .7", &u) < 0);
         assert_se(parse_nsec(".3 infinity", &u) < 0);
 }

 static void test_format_timespan_one(usec_t x, usec_t accuracy) {
         char *r;
         char l[FORMAT_TIMESPAN_MAX];
         usec_t y;

         log_info(USEC_FMT"     (at accuracy "USEC_FMT")", x, accuracy);

         r = format_timespan(l, sizeof(l), x, accuracy);
         assert_se(r);

         log_info(" = <%s>", l);

         assert_se(parse_sec(l, &y) >= 0);

         log_info(" = "USEC_FMT, y);

         if (accuracy <= 0)
                 accuracy = 1;

         assert_se(x / accuracy == y / accuracy);
 }

 static void test_format_timespan(usec_t accuracy) {
         test_format_timespan_one(0, accuracy);
         test_format_timespan_one(1, accuracy);
         test_format_timespan_one(1*USEC_PER_SEC, accuracy);
         test_format_timespan_one(999*USEC_PER_MSEC, accuracy);
         test_format_timespan_one(1234567, accuracy);
         test_format_timespan_one(12, accuracy);
         test_format_timespan_one(123, accuracy);
         test_format_timespan_one(1234, accuracy);
         test_format_timespan_one(12345, accuracy);
         test_format_timespan_one(123456, accuracy);
         test_format_timespan_one(1234567, accuracy);
         test_format_timespan_one(12345678, accuracy);
         test_format_timespan_one(1200000, accuracy);
         test_format_timespan_one(1230000, accuracy);
         test_format_timespan_one(1230000, accuracy);
         test_format_timespan_one(1234000, accuracy);
         test_format_timespan_one(1234500, accuracy);
         test_format_timespan_one(1234560, accuracy);
         test_format_timespan_one(1234567, accuracy);
         test_format_timespan_one(986087, accuracy);
         test_format_timespan_one(500 * USEC_PER_MSEC, accuracy);
         test_format_timespan_one(9*USEC_PER_YEAR/5 - 23, accuracy);
         test_format_timespan_one(USEC_INFINITY, accuracy);
 }

 static void test_timezone_is_valid(void) {
         assert_se(timezone_is_valid("Europe/Berlin"));
         assert_se(timezone_is_valid("Australia/Sydney"));
         assert_se(!timezone_is_valid("Europe/Do not exist"));
 }

 static void test_get_timezones(void) {
         _cleanup_strv_free_ char **zones = NULL;
         int r;
         char **zone;

         r = get_timezones(&zones);
         assert_se(r == 0);

         STRV_FOREACH(zone, zones)
                 assert_se(timezone_is_valid(*zone));
 }

 static void test_usec_add(void) {
         assert_se(usec_add(0, 0) == 0);
         assert_se(usec_add(1, 4) == 5);
         assert_se(usec_add(USEC_INFINITY, 5) == USEC_INFINITY);
         assert_se(usec_add(5, USEC_INFINITY) == USEC_INFINITY);
         assert_se(usec_add(USEC_INFINITY-5, 2) == USEC_INFINITY-3);
         assert_se(usec_add(USEC_INFINITY-2, 2) == USEC_INFINITY);
         assert_se(usec_add(USEC_INFINITY-1, 2) == USEC_INFINITY);
         assert_se(usec_add(USEC_INFINITY, 2) == USEC_INFINITY);
 }

 static void test_usec_sub(void) {
         assert_se(usec_sub(0, 0) == 0);
         assert_se(usec_sub(4, 1) == 3);
         assert_se(usec_sub(4, 4) == 0);
         assert_se(usec_sub(4, 5) == 0);
         assert_se(usec_sub(USEC_INFINITY-3, -3) == USEC_INFINITY);
         assert_se(usec_sub(USEC_INFINITY-3, -3) == USEC_INFINITY);
         assert_se(usec_sub(USEC_INFINITY-3, -4) == USEC_INFINITY);
         assert_se(usec_sub(USEC_INFINITY-3, -5) == USEC_INFINITY);
         assert_se(usec_sub(USEC_INFINITY, 5) == USEC_INFINITY);
 }

 static void test_format_timestamp(void) {
         unsigned i;

         for (i = 0; i < 100; i++) {
                 char buf[MAX(FORMAT_TIMESTAMP_MAX, FORMAT_TIMESPAN_MAX)];
                 usec_t x, y;

                 random_bytes(&x, sizeof(x));
                 x = x % (2147483600 * USEC_PER_SEC) + 1;

                 assert_se(format_timestamp(buf, sizeof(buf), x));
                 log_info("%s", buf);
                 assert_se(parse_timestamp(buf, &y) >= 0);
                 assert_se(x / USEC_PER_SEC == y / USEC_PER_SEC);

                 assert_se(format_timestamp_utc(buf, sizeof(buf), x));
                 log_info("%s", buf);
                 assert_se(parse_timestamp(buf, &y) >= 0);
                 assert_se(x / USEC_PER_SEC == y / USEC_PER_SEC);

                 assert_se(format_timestamp_us(buf, sizeof(buf), x));
                 log_info("%s", buf);
                 assert_se(parse_timestamp(buf, &y) >= 0);
                 assert_se(x == y);

                 assert_se(format_timestamp_us_utc(buf, sizeof(buf), x));
                 log_info("%s", buf);
                 assert_se(parse_timestamp(buf, &y) >= 0);
                 assert_se(x == y);

                 assert_se(format_timestamp_relative(buf, sizeof(buf), x));
                 log_info("%s", buf);
                 assert_se(parse_timestamp(buf, &y) >= 0);

                 /* The two calls above will run with a slightly different local time. Make sure we are in the same
                  * range however, but give enough leeway that this is unlikely to explode. And of course,
                  * format_timestamp_relative() scales the accuracy with the distance from the current time up to one
                  * month, cover for that too. */
                 assert_se(y > x ? y - x : x - y <= USEC_PER_MONTH + USEC_PER_DAY);
         }
 }

 static void test_format_timestamp_utc_one(usec_t t, const char *result) {
         char buf[FORMAT_TIMESTAMP_MAX];

         assert_se(!format_timestamp_utc(buf, sizeof(buf), t) == !result);

         if (result)
                 assert_se(streq(result, buf));
 }

 static void test_format_timestamp_utc(void) {
         test_format_timestamp_utc_one(0, NULL);
         test_format_timestamp_utc_one(1, "Thu 1970-01-01 00:00:00 UTC");
         test_format_timestamp_utc_one(USEC_PER_SEC, "Thu 1970-01-01 00:00:01 UTC");

 #if SIZEOF_TIME_T == 8
         test_format_timestamp_utc_one(USEC_TIMESTAMP_FORMATTABLE_MAX, "Thu 9999-12-30 23:59:59 UTC");
 #elif SIZEOF_TIME_T == 4
         test_format_timestamp_utc_one(USEC_TIMESTAMP_FORMATTABLE_MAX, "Tue 2038-01-19 03:14:07 UTC");
 #endif

         test_format_timestamp_utc_one(USEC_TIMESTAMP_FORMATTABLE_MAX+1, NULL);
         test_format_timestamp_utc_one(USEC_INFINITY, NULL);
 }

 int main(int argc, char *argv[]) {
         uintmax_t x;

         test_parse_sec();
         test_parse_time();
         test_parse_nsec();
         test_format_timespan(1);
         test_format_timespan(USEC_PER_MSEC);
         test_format_timespan(USEC_PER_SEC);
         test_timezone_is_valid();
         test_get_timezones();
         test_usec_add();
         test_usec_sub();
         test_format_timestamp();
         test_format_timestamp_utc();

         /* Ensure time_t is signed */
         assert_cc((time_t) -1 < (time_t) 1);

         /* Ensure TIME_T_MAX works correctly */
         x = (uintmax_t) TIME_T_MAX;
         x++;
         assert((time_t) x < 0);

         return 0;
 }
	/***
	This file is part of systemd.

	Copyright 2013 Lennart Poettering

	systemd is free software; you can redistribute it and/or modify it
	under the terms of the GNU Lesser General Public License as published by
	the Free Software Foundation; either version 2.1 of the License, or
	(at your option) any later version.

	systemd is distributed in the hope that it will be useful, but
	WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	Lesser General Public License for more details.

	You should have received a copy of the GNU Lesser General Public License
	along with systemd; If not, see <http://www.gnu.org/licenses/>.
	***/

	#include "random-util.h"
	#include "string-util.h"
	#include "strv.h"
	#include "time-util.h"

	static void test_parse_sec(void) {
	usec_t u;

	assert_se(parse_sec("5s", &u) >= 0);
	assert_se(u == 5 * USEC_PER_SEC);
	assert_se(parse_sec("5s500ms", &u) >= 0);
	assert_se(u == 5 * USEC_PER_SEC + 500 * USEC_PER_MSEC);
	assert_se(parse_sec(" 5s 500ms ", &u) >= 0);
	assert_se(u == 5 * USEC_PER_SEC + 500 * USEC_PER_MSEC);
	assert_se(parse_sec(" 5.5s ", &u) >= 0);
	assert_se(u == 5 * USEC_PER_SEC + 500 * USEC_PER_MSEC);
	assert_se(parse_sec(" 5.5s 0.5ms ", &u) >= 0);
	assert_se(u == 5 * USEC_PER_SEC + 500 * USEC_PER_MSEC + 500);
	assert_se(parse_sec(" .22s ", &u) >= 0);
	assert_se(u == 220 * USEC_PER_MSEC);
	assert_se(parse_sec(" .50y ", &u) >= 0);
	assert_se(u == USEC_PER_YEAR / 2);
	assert_se(parse_sec("2.5", &u) >= 0);
	assert_se(u == 2500 * USEC_PER_MSEC);
	assert_se(parse_sec(".7", &u) >= 0);
	assert_se(u == 700 * USEC_PER_MSEC);
	assert_se(parse_sec("23us", &u) >= 0);
	assert_se(u == 23);
	assert_se(parse_sec("23µs", &u) >= 0);
	assert_se(u == 23);
	assert_se(parse_sec("infinity", &u) >= 0);
	assert_se(u == USEC_INFINITY);
	assert_se(parse_sec(" infinity ", &u) >= 0);
	assert_se(u == USEC_INFINITY);

	assert_se(parse_sec(" xyz ", &u) < 0);
	assert_se(parse_sec("", &u) < 0);
	assert_se(parse_sec(" . ", &u) < 0);
	assert_se(parse_sec(" 5. ", &u) < 0);
	assert_se(parse_sec(".s ", &u) < 0);
	assert_se(parse_sec(" infinity .7", &u) < 0);
	assert_se(parse_sec(".3 infinity", &u) < 0);
	}

	static void test_parse_time(void) {
	usec_t u;

	assert_se(parse_time("5", &u, 1) >= 0);
	assert_se(u == 5);

	assert_se(parse_time("5", &u, USEC_PER_MSEC) >= 0);
	assert_se(u == 5 * USEC_PER_MSEC);

	assert_se(parse_time("5", &u, USEC_PER_SEC) >= 0);
	assert_se(u == 5 * USEC_PER_SEC);

	assert_se(parse_time("5s", &u, 1) >= 0);
	assert_se(u == 5 * USEC_PER_SEC);

	assert_se(parse_time("5s", &u, USEC_PER_SEC) >= 0);
	assert_se(u == 5 * USEC_PER_SEC);

	assert_se(parse_time("5s", &u, USEC_PER_MSEC) >= 0);
	assert_se(u == 5 * USEC_PER_SEC);
	}

	static void test_parse_nsec(void) {
	nsec_t u;

	assert_se(parse_nsec("5s", &u) >= 0);
	assert_se(u == 5 * NSEC_PER_SEC);
	assert_se(parse_nsec("5s500ms", &u) >= 0);
	assert_se(u == 5 * NSEC_PER_SEC + 500 * NSEC_PER_MSEC);
	assert_se(parse_nsec(" 5s 500ms ", &u) >= 0);
	assert_se(u == 5 * NSEC_PER_SEC + 500 * NSEC_PER_MSEC);
	assert_se(parse_nsec(" 5.5s ", &u) >= 0);
	assert_se(u == 5 * NSEC_PER_SEC + 500 * NSEC_PER_MSEC);
	assert_se(parse_nsec(" 5.5s 0.5ms ", &u) >= 0);
	assert_se(u == 5 * NSEC_PER_SEC + 500 * NSEC_PER_MSEC + 500 * NSEC_PER_USEC);
	assert_se(parse_nsec(" .22s ", &u) >= 0);
	assert_se(u == 220 * NSEC_PER_MSEC);
	assert_se(parse_nsec(" .50y ", &u) >= 0);
	assert_se(u == NSEC_PER_YEAR / 2);
	assert_se(parse_nsec("2.5", &u) >= 0);
	assert_se(u == 2);
	assert_se(parse_nsec(".7", &u) >= 0);
	assert_se(u == 0);
	assert_se(parse_nsec("infinity", &u) >= 0);
	assert_se(u == NSEC_INFINITY);
	assert_se(parse_nsec(" infinity ", &u) >= 0);
	assert_se(u == NSEC_INFINITY);

	assert_se(parse_nsec(" xyz ", &u) < 0);
	assert_se(parse_nsec("", &u) < 0);
	assert_se(parse_nsec(" . ", &u) < 0);
	assert_se(parse_nsec(" 5. ", &u) < 0);
	assert_se(parse_nsec(".s ", &u) < 0);
	assert_se(parse_nsec(" infinity .7", &u) < 0);
	assert_se(parse_nsec(".3 infinity", &u) < 0);
	}

	static void test_format_timespan_one(usec_t x, usec_t accuracy) {
	char *r;
	char l[FORMAT_TIMESPAN_MAX];
	usec_t y;

	log_info(USEC_FMT" (at accuracy "USEC_FMT")", x, accuracy);

	r = format_timespan(l, sizeof(l), x, accuracy);
	assert_se(r);

	log_info(" = <%s>", l);

	assert_se(parse_sec(l, &y) >= 0);

	log_info(" = "USEC_FMT, y);

	if (accuracy <= 0)
	accuracy = 1;

	assert_se(x / accuracy == y / accuracy);
	}

	static void test_format_timespan(usec_t accuracy) {
	test_format_timespan_one(0, accuracy);
	test_format_timespan_one(1, accuracy);
	test_format_timespan_one(1*USEC_PER_SEC, accuracy);
	test_format_timespan_one(999*USEC_PER_MSEC, accuracy);
	test_format_timespan_one(1234567, accuracy);
	test_format_timespan_one(12, accuracy);
	test_format_timespan_one(123, accuracy);
	test_format_timespan_one(1234, accuracy);
	test_format_timespan_one(12345, accuracy);
	test_format_timespan_one(123456, accuracy);
	test_format_timespan_one(1234567, accuracy);
	test_format_timespan_one(12345678, accuracy);
	test_format_timespan_one(1200000, accuracy);
	test_format_timespan_one(1230000, accuracy);
	test_format_timespan_one(1230000, accuracy);
	test_format_timespan_one(1234000, accuracy);
	test_format_timespan_one(1234500, accuracy);
	test_format_timespan_one(1234560, accuracy);
	test_format_timespan_one(1234567, accuracy);
	test_format_timespan_one(986087, accuracy);
	test_format_timespan_one(500 * USEC_PER_MSEC, accuracy);
	test_format_timespan_one(9*USEC_PER_YEAR/5 - 23, accuracy);
	test_format_timespan_one(USEC_INFINITY, accuracy);
	}

	static void test_timezone_is_valid(void) {
	assert_se(timezone_is_valid("Europe/Berlin"));
	assert_se(timezone_is_valid("Australia/Sydney"));
	assert_se(!timezone_is_valid("Europe/Do not exist"));
	}

	static void test_get_timezones(void) {
	_cleanup_strv_free_ char **zones = NULL;
	int r;
	char **zone;

	r = get_timezones(&zones);
	assert_se(r == 0);

	STRV_FOREACH(zone, zones)
	assert_se(timezone_is_valid(*zone));
	}

	static void test_usec_add(void) {
	assert_se(usec_add(0, 0) == 0);
	assert_se(usec_add(1, 4) == 5);
	assert_se(usec_add(USEC_INFINITY, 5) == USEC_INFINITY);
	assert_se(usec_add(5, USEC_INFINITY) == USEC_INFINITY);
	assert_se(usec_add(USEC_INFINITY-5, 2) == USEC_INFINITY-3);
	assert_se(usec_add(USEC_INFINITY-2, 2) == USEC_INFINITY);
	assert_se(usec_add(USEC_INFINITY-1, 2) == USEC_INFINITY);
	assert_se(usec_add(USEC_INFINITY, 2) == USEC_INFINITY);
	}

	static void test_usec_sub(void) {
	assert_se(usec_sub(0, 0) == 0);
	assert_se(usec_sub(4, 1) == 3);
	assert_se(usec_sub(4, 4) == 0);
	assert_se(usec_sub(4, 5) == 0);
	assert_se(usec_sub(USEC_INFINITY-3, -3) == USEC_INFINITY);
	assert_se(usec_sub(USEC_INFINITY-3, -3) == USEC_INFINITY);
	assert_se(usec_sub(USEC_INFINITY-3, -4) == USEC_INFINITY);
	assert_se(usec_sub(USEC_INFINITY-3, -5) == USEC_INFINITY);
	assert_se(usec_sub(USEC_INFINITY, 5) == USEC_INFINITY);
	}

	static void test_format_timestamp(void) {
	unsigned i;

	for (i = 0; i < 100; i++) {
	char buf[MAX(FORMAT_TIMESTAMP_MAX, FORMAT_TIMESPAN_MAX)];
	usec_t x, y;

	random_bytes(&x, sizeof(x));
	x = x % (2147483600 * USEC_PER_SEC) + 1;

	assert_se(format_timestamp(buf, sizeof(buf), x));
	log_info("%s", buf);
	assert_se(parse_timestamp(buf, &y) >= 0);
	assert_se(x / USEC_PER_SEC == y / USEC_PER_SEC);

	assert_se(format_timestamp_utc(buf, sizeof(buf), x));
	log_info("%s", buf);
	assert_se(parse_timestamp(buf, &y) >= 0);
	assert_se(x / USEC_PER_SEC == y / USEC_PER_SEC);

	assert_se(format_timestamp_us(buf, sizeof(buf), x));
	log_info("%s", buf);
	assert_se(parse_timestamp(buf, &y) >= 0);
	assert_se(x == y);

	assert_se(format_timestamp_us_utc(buf, sizeof(buf), x));
	log_info("%s", buf);
	assert_se(parse_timestamp(buf, &y) >= 0);
	assert_se(x == y);

	assert_se(format_timestamp_relative(buf, sizeof(buf), x));
	log_info("%s", buf);
	assert_se(parse_timestamp(buf, &y) >= 0);

	/* The two calls above will run with a slightly different local time. Make sure we are in the same
	* range however, but give enough leeway that this is unlikely to explode. And of course,
	* format_timestamp_relative() scales the accuracy with the distance from the current time up to one
	* month, cover for that too. */
	assert_se(y > x ? y - x : x - y <= USEC_PER_MONTH + USEC_PER_DAY);
	}
	}

	static void test_format_timestamp_utc_one(usec_t t, const char *result) {
	char buf[FORMAT_TIMESTAMP_MAX];

	assert_se(!format_timestamp_utc(buf, sizeof(buf), t) == !result);

	if (result)
	assert_se(streq(result, buf));
	}

	static void test_format_timestamp_utc(void) {
	test_format_timestamp_utc_one(0, NULL);
	test_format_timestamp_utc_one(1, "Thu 1970-01-01 00:00:00 UTC");
	test_format_timestamp_utc_one(USEC_PER_SEC, "Thu 1970-01-01 00:00:01 UTC");

	#if SIZEOF_TIME_T == 8
	test_format_timestamp_utc_one(USEC_TIMESTAMP_FORMATTABLE_MAX, "Thu 9999-12-30 23:59:59 UTC");
	#elif SIZEOF_TIME_T == 4
	test_format_timestamp_utc_one(USEC_TIMESTAMP_FORMATTABLE_MAX, "Tue 2038-01-19 03:14:07 UTC");
	#endif

	test_format_timestamp_utc_one(USEC_TIMESTAMP_FORMATTABLE_MAX+1, NULL);
	test_format_timestamp_utc_one(USEC_INFINITY, NULL);
	}

	int main(int argc, char *argv[]) {
	uintmax_t x;

	test_parse_sec();
	test_parse_time();
	test_parse_nsec();
	test_format_timespan(1);
	test_format_timespan(USEC_PER_MSEC);
	test_format_timespan(USEC_PER_SEC);
	test_timezone_is_valid();
	test_get_timezones();
	test_usec_add();
	test_usec_sub();
	test_format_timestamp();
	test_format_timestamp_utc();

	/* Ensure time_t is signed */
	assert_cc((time_t) -1 < (time_t) 1);

	/* Ensure TIME_T_MAX works correctly */
	x = (uintmax_t) TIME_T_MAX;
	x++;
	assert((time_t) x < 0);

	return 0;
	}