src/test/test-time-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include "random-util.h"
   4 #include "serialize.h"
   5 #include "string-util.h"
   6 #include "strv.h"
   7 #include "tests.h"
   8 #include "time-util.h"
   9
  10 static void test_parse_sec(void) {
  11         usec_t u;
  12
  13         log_info("/* %s */", __func__);
  14
  15         assert_se(parse_sec("5s", &u) >= 0);
  16         assert_se(u == 5 * USEC_PER_SEC);
  17         assert_se(parse_sec("5s500ms", &u) >= 0);
  18         assert_se(u == 5 * USEC_PER_SEC + 500 * USEC_PER_MSEC);
  19         assert_se(parse_sec(" 5s 500ms  ", &u) >= 0);
  20         assert_se(u == 5 * USEC_PER_SEC + 500 * USEC_PER_MSEC);
  21         assert_se(parse_sec(" 5.5s  ", &u) >= 0);
  22         assert_se(u == 5 * USEC_PER_SEC + 500 * USEC_PER_MSEC);
  23         assert_se(parse_sec(" 5.5s 0.5ms ", &u) >= 0);
  24         assert_se(u == 5 * USEC_PER_SEC + 500 * USEC_PER_MSEC + 500);
  25         assert_se(parse_sec(" .22s ", &u) >= 0);
  26         assert_se(u == 220 * USEC_PER_MSEC);
  27         assert_se(parse_sec(" .50y ", &u) >= 0);
  28         assert_se(u == USEC_PER_YEAR / 2);
  29         assert_se(parse_sec("2.5", &u) >= 0);
  30         assert_se(u == 2500 * USEC_PER_MSEC);
  31         assert_se(parse_sec(".7", &u) >= 0);
  32         assert_se(u == 700 * USEC_PER_MSEC);
  33         assert_se(parse_sec("23us", &u) >= 0);
  34         assert_se(u == 23);
  35         assert_se(parse_sec("23µs", &u) >= 0);
  36         assert_se(u == 23);
  37         assert_se(parse_sec("infinity", &u) >= 0);
  38         assert_se(u == USEC_INFINITY);
  39         assert_se(parse_sec(" infinity ", &u) >= 0);
  40         assert_se(u == USEC_INFINITY);
  41         assert_se(parse_sec("+3.1s", &u) >= 0);
  42         assert_se(u == 3100 * USEC_PER_MSEC);
  43         assert_se(parse_sec("3.1s.2", &u) >= 0);
  44         assert_se(u == 3300 * USEC_PER_MSEC);
  45         assert_se(parse_sec("3.1 .2", &u) >= 0);
  46         assert_se(u == 3300 * USEC_PER_MSEC);
  47         assert_se(parse_sec("3.1 sec .2 sec", &u) >= 0);
  48         assert_se(u == 3300 * USEC_PER_MSEC);
  49         assert_se(parse_sec("3.1 sec 1.2 sec", &u) >= 0);
  50         assert_se(u == 4300 * USEC_PER_MSEC);
  51
  52         assert_se(parse_sec(" xyz ", &u) < 0);
  53         assert_se(parse_sec("", &u) < 0);
  54         assert_se(parse_sec(" . ", &u) < 0);
  55         assert_se(parse_sec(" 5. ", &u) < 0);
  56         assert_se(parse_sec(".s ", &u) < 0);
  57         assert_se(parse_sec("-5s ", &u) < 0);
  58         assert_se(parse_sec("-0.3s ", &u) < 0);
  59         assert_se(parse_sec("-0.0s ", &u) < 0);
  60         assert_se(parse_sec("-0.-0s ", &u) < 0);
  61         assert_se(parse_sec("0.-0s ", &u) < 0);
  62         assert_se(parse_sec("3.-0s ", &u) < 0);
  63         assert_se(parse_sec(" infinity .7", &u) < 0);
  64         assert_se(parse_sec(".3 infinity", &u) < 0);
  65         assert_se(parse_sec("3.+1s", &u) < 0);
  66         assert_se(parse_sec("3. 1s", &u) < 0);
  67         assert_se(parse_sec("3.s", &u) < 0);
  68         assert_se(parse_sec("12.34.56", &u) < 0);
  69         assert_se(parse_sec("12..34", &u) < 0);
  70         assert_se(parse_sec("..1234", &u) < 0);
  71         assert_se(parse_sec("1234..", &u) < 0);
  72 }
  73
  74 static void test_parse_sec_fix_0(void) {
  75         usec_t u;
  76
  77         log_info("/* %s */", __func__);
  78
  79         assert_se(parse_sec_fix_0("5s", &u) >= 0);
  80         assert_se(u == 5 * USEC_PER_SEC);
  81         assert_se(parse_sec_fix_0("0s", &u) >= 0);
  82         assert_se(u == USEC_INFINITY);
  83         assert_se(parse_sec_fix_0("0", &u) >= 0);
  84         assert_se(u == USEC_INFINITY);
  85         assert_se(parse_sec_fix_0(" 0", &u) >= 0);
  86         assert_se(u == USEC_INFINITY);
  87 }
  88
  89 static void test_parse_sec_def_infinity(void) {
  90         usec_t u;
  91
  92         log_info("/* %s */", __func__);
  93
  94         assert_se(parse_sec_def_infinity("5s", &u) >= 0);
  95         assert_se(u == 5 * USEC_PER_SEC);
  96         assert_se(parse_sec_def_infinity("", &u) >= 0);
  97         assert_se(u == USEC_INFINITY);
  98         assert_se(parse_sec_def_infinity("     ", &u) >= 0);
  99         assert_se(u == USEC_INFINITY);
 100         assert_se(parse_sec_def_infinity("0s", &u) >= 0);
 101         assert_se(u == 0);
 102         assert_se(parse_sec_def_infinity("0", &u) >= 0);
 103         assert_se(u == 0);
 104         assert_se(parse_sec_def_infinity(" 0", &u) >= 0);
 105         assert_se(u == 0);
 106         assert_se(parse_sec_def_infinity("-5s", &u) < 0);
 107 }
 108
 109 static void test_parse_time(void) {
 110         usec_t u;
 111
 112         log_info("/* %s */", __func__);
 113
 114         assert_se(parse_time("5", &u, 1) >= 0);
 115         assert_se(u == 5);
 116
 117         assert_se(parse_time("5", &u, USEC_PER_MSEC) >= 0);
 118         assert_se(u == 5 * USEC_PER_MSEC);
 119
 120         assert_se(parse_time("5", &u, USEC_PER_SEC) >= 0);
 121         assert_se(u == 5 * USEC_PER_SEC);
 122
 123         assert_se(parse_time("5s", &u, 1) >= 0);
 124         assert_se(u == 5 * USEC_PER_SEC);
 125
 126         assert_se(parse_time("5s", &u, USEC_PER_SEC) >= 0);
 127         assert_se(u == 5 * USEC_PER_SEC);
 128
 129         assert_se(parse_time("5s", &u, USEC_PER_MSEC) >= 0);
 130         assert_se(u == 5 * USEC_PER_SEC);
 131
 132         assert_se(parse_time("11111111111111y", &u, 1) == -ERANGE);
 133         assert_se(parse_time("1.1111111111111y", &u, 1) >= 0);
 134 }
 135
 136 static void test_parse_nsec(void) {
 137         nsec_t u;
 138
 139         log_info("/* %s */", __func__);
 140
 141         assert_se(parse_nsec("5s", &u) >= 0);
 142         assert_se(u == 5 * NSEC_PER_SEC);
 143         assert_se(parse_nsec("5s500ms", &u) >= 0);
 144         assert_se(u == 5 * NSEC_PER_SEC + 500 * NSEC_PER_MSEC);
 145         assert_se(parse_nsec(" 5s 500ms  ", &u) >= 0);
 146         assert_se(u == 5 * NSEC_PER_SEC + 500 * NSEC_PER_MSEC);
 147         assert_se(parse_nsec(" 5.5s  ", &u) >= 0);
 148         assert_se(u == 5 * NSEC_PER_SEC + 500 * NSEC_PER_MSEC);
 149         assert_se(parse_nsec(" 5.5s 0.5ms ", &u) >= 0);
 150         assert_se(u == 5 * NSEC_PER_SEC + 500 * NSEC_PER_MSEC + 500 * NSEC_PER_USEC);
 151         assert_se(parse_nsec(" .22s ", &u) >= 0);
 152         assert_se(u == 220 * NSEC_PER_MSEC);
 153         assert_se(parse_nsec(" .50y ", &u) >= 0);
 154         assert_se(u == NSEC_PER_YEAR / 2);
 155         assert_se(parse_nsec("2.5", &u) >= 0);
 156         assert_se(u == 2);
 157         assert_se(parse_nsec(".7", &u) >= 0);
 158         assert_se(u == 0);
 159         assert_se(parse_nsec("infinity", &u) >= 0);
 160         assert_se(u == NSEC_INFINITY);
 161         assert_se(parse_nsec(" infinity ", &u) >= 0);
 162         assert_se(u == NSEC_INFINITY);
 163         assert_se(parse_nsec("+3.1s", &u) >= 0);
 164         assert_se(u == 3100 * NSEC_PER_MSEC);
 165         assert_se(parse_nsec("3.1s.2", &u) >= 0);
 166         assert_se(u == 3100 * NSEC_PER_MSEC);
 167         assert_se(parse_nsec("3.1 .2s", &u) >= 0);
 168         assert_se(u == 200 * NSEC_PER_MSEC + 3);
 169         assert_se(parse_nsec("3.1 sec .2 sec", &u) >= 0);
 170         assert_se(u == 3300 * NSEC_PER_MSEC);
 171         assert_se(parse_nsec("3.1 sec 1.2 sec", &u) >= 0);
 172         assert_se(u == 4300 * NSEC_PER_MSEC);
 173
 174         assert_se(parse_nsec(" xyz ", &u) < 0);
 175         assert_se(parse_nsec("", &u) < 0);
 176         assert_se(parse_nsec(" . ", &u) < 0);
 177         assert_se(parse_nsec(" 5. ", &u) < 0);
 178         assert_se(parse_nsec(".s ", &u) < 0);
 179         assert_se(parse_nsec(" infinity .7", &u) < 0);
 180         assert_se(parse_nsec(".3 infinity", &u) < 0);
 181         assert_se(parse_nsec("-5s ", &u) < 0);
 182         assert_se(parse_nsec("-0.3s ", &u) < 0);
 183         assert_se(parse_nsec("-0.0s ", &u) < 0);
 184         assert_se(parse_nsec("-0.-0s ", &u) < 0);
 185         assert_se(parse_nsec("0.-0s ", &u) < 0);
 186         assert_se(parse_nsec("3.-0s ", &u) < 0);
 187         assert_se(parse_nsec(" infinity .7", &u) < 0);
 188         assert_se(parse_nsec(".3 infinity", &u) < 0);
 189         assert_se(parse_nsec("3.+1s", &u) < 0);
 190         assert_se(parse_nsec("3. 1s", &u) < 0);
 191         assert_se(parse_nsec("3.s", &u) < 0);
 192         assert_se(parse_nsec("12.34.56", &u) < 0);
 193         assert_se(parse_nsec("12..34", &u) < 0);
 194         assert_se(parse_nsec("..1234", &u) < 0);
 195         assert_se(parse_nsec("1234..", &u) < 0);
 196         assert_se(parse_nsec("1111111111111y", &u) == -ERANGE);
 197         assert_se(parse_nsec("1.111111111111y", &u) >= 0);
 198 }
 199
 200 static void test_format_timespan_one(usec_t x, usec_t accuracy) {
 201         char l[FORMAT_TIMESPAN_MAX];
 202         const char *t;
 203         usec_t y;
 204
 205         log_info(USEC_FMT"     (at accuracy "USEC_FMT")", x, accuracy);
 206
 207         assert_se(t = format_timespan(l, sizeof l, x, accuracy));
 208         log_info(" = <%s>", t);
 209
 210         assert_se(parse_sec(t, &y) >= 0);
 211         log_info(" = "USEC_FMT, y);
 212
 213         if (accuracy <= 0)
 214                 accuracy = 1;
 215
 216         assert_se(x / accuracy == y / accuracy);
 217 }
 218
 219 static void test_format_timespan(usec_t accuracy) {
 220         log_info("/* %s accuracy="USEC_FMT" */", __func__, accuracy);
 221
 222         test_format_timespan_one(0, accuracy);
 223         test_format_timespan_one(1, accuracy);
 224         test_format_timespan_one(1*USEC_PER_SEC, accuracy);
 225         test_format_timespan_one(999*USEC_PER_MSEC, accuracy);
 226         test_format_timespan_one(1234567, accuracy);
 227         test_format_timespan_one(12, accuracy);
 228         test_format_timespan_one(123, accuracy);
 229         test_format_timespan_one(1234, accuracy);
 230         test_format_timespan_one(12345, accuracy);
 231         test_format_timespan_one(123456, accuracy);
 232         test_format_timespan_one(1234567, accuracy);
 233         test_format_timespan_one(12345678, accuracy);
 234         test_format_timespan_one(1200000, accuracy);
 235         test_format_timespan_one(1230000, accuracy);
 236         test_format_timespan_one(1234000, accuracy);
 237         test_format_timespan_one(1234500, accuracy);
 238         test_format_timespan_one(1234560, accuracy);
 239         test_format_timespan_one(1234567, accuracy);
 240         test_format_timespan_one(986087, accuracy);
 241         test_format_timespan_one(500 * USEC_PER_MSEC, accuracy);
 242         test_format_timespan_one(9*USEC_PER_YEAR/5 - 23, accuracy);
 243         test_format_timespan_one(USEC_INFINITY, accuracy);
 244 }
 245
 246 static void test_timezone_is_valid(void) {
 247         log_info("/* %s */", __func__);
 248
 249         assert_se(timezone_is_valid("Europe/Berlin", LOG_ERR));
 250         assert_se(timezone_is_valid("Australia/Sydney", LOG_ERR));
 251         assert_se(!timezone_is_valid("Europe/Do not exist", LOG_ERR));
 252 }
 253
 254 static void test_get_timezones(void) {
 255         _cleanup_strv_free_ char **zones = NULL;
 256         int r;
 257         char **zone;
 258
 259         log_info("/* %s */", __func__);
 260
 261         r = get_timezones(&zones);
 262         assert_se(r == 0);
 263
 264         STRV_FOREACH(zone, zones) {
 265                 log_info("zone: %s", *zone);
 266                 assert_se(timezone_is_valid(*zone, LOG_ERR));
 267         }
 268 }
 269
 270 static void test_usec_add(void) {
 271         log_info("/* %s */", __func__);
 272
 273         assert_se(usec_add(0, 0) == 0);
 274         assert_se(usec_add(1, 4) == 5);
 275         assert_se(usec_add(USEC_INFINITY, 5) == USEC_INFINITY);
 276         assert_se(usec_add(5, USEC_INFINITY) == USEC_INFINITY);
 277         assert_se(usec_add(USEC_INFINITY-5, 2) == USEC_INFINITY-3);
 278         assert_se(usec_add(USEC_INFINITY-2, 2) == USEC_INFINITY);
 279         assert_se(usec_add(USEC_INFINITY-1, 2) == USEC_INFINITY);
 280         assert_se(usec_add(USEC_INFINITY, 2) == USEC_INFINITY);
 281 }
 282
 283 static void test_usec_sub_unsigned(void) {
 284         log_info("/* %s */", __func__);
 285
 286         assert_se(usec_sub_unsigned(0, 0) == 0);
 287         assert_se(usec_sub_unsigned(0, 2) == 0);
 288         assert_se(usec_sub_unsigned(0, USEC_INFINITY) == 0);
 289         assert_se(usec_sub_unsigned(1, 0) == 1);
 290         assert_se(usec_sub_unsigned(1, 1) == 0);
 291         assert_se(usec_sub_unsigned(1, 2) == 0);
 292         assert_se(usec_sub_unsigned(1, 3) == 0);
 293         assert_se(usec_sub_unsigned(1, USEC_INFINITY) == 0);
 294         assert_se(usec_sub_unsigned(USEC_INFINITY-1, 0) == USEC_INFINITY-1);
 295         assert_se(usec_sub_unsigned(USEC_INFINITY-1, 1) == USEC_INFINITY-2);
 296         assert_se(usec_sub_unsigned(USEC_INFINITY-1, 2) == USEC_INFINITY-3);
 297         assert_se(usec_sub_unsigned(USEC_INFINITY-1, USEC_INFINITY-2) == 1);
 298         assert_se(usec_sub_unsigned(USEC_INFINITY-1, USEC_INFINITY-1) == 0);
 299         assert_se(usec_sub_unsigned(USEC_INFINITY-1, USEC_INFINITY) == 0);
 300         assert_se(usec_sub_unsigned(USEC_INFINITY, 0) == USEC_INFINITY);
 301         assert_se(usec_sub_unsigned(USEC_INFINITY, 1) == USEC_INFINITY);
 302         assert_se(usec_sub_unsigned(USEC_INFINITY, 2) == USEC_INFINITY);
 303         assert_se(usec_sub_unsigned(USEC_INFINITY, USEC_INFINITY) == USEC_INFINITY);
 304 }
 305
 306 static void test_usec_sub_signed(void) {
 307         log_info("/* %s */", __func__);
 308
 309         assert_se(usec_sub_signed(0, 0) == 0);
 310         assert_se(usec_sub_signed(4, 1) == 3);
 311         assert_se(usec_sub_signed(4, 4) == 0);
 312         assert_se(usec_sub_signed(4, 5) == 0);
 313         assert_se(usec_sub_signed(USEC_INFINITY-3, -3) == USEC_INFINITY);
 314         assert_se(usec_sub_signed(USEC_INFINITY-3, -4) == USEC_INFINITY);
 315         assert_se(usec_sub_signed(USEC_INFINITY-3, -5) == USEC_INFINITY);
 316         assert_se(usec_sub_signed(USEC_INFINITY, 5) == USEC_INFINITY);
 317 }
 318
 319 static void test_format_timestamp(void) {
 320         unsigned i;
 321
 322         log_info("/* %s */", __func__);
 323
 324         for (i = 0; i < 100; i++) {
 325                 char buf[MAX(FORMAT_TIMESTAMP_MAX, FORMAT_TIMESPAN_MAX)];
 326                 usec_t x, y;
 327
 328                 random_bytes(&x, sizeof(x));
 329                 x = x % (2147483600 * USEC_PER_SEC) + 1;
 330
 331                 assert_se(format_timestamp(buf, sizeof(buf), x));
 332                 log_info("%s", buf);
 333                 assert_se(parse_timestamp(buf, &y) >= 0);
 334                 assert_se(x / USEC_PER_SEC == y / USEC_PER_SEC);
 335
 336                 assert_se(format_timestamp_utc(buf, sizeof(buf), x));
 337                 log_info("%s", buf);
 338                 assert_se(parse_timestamp(buf, &y) >= 0);
 339                 assert_se(x / USEC_PER_SEC == y / USEC_PER_SEC);
 340
 341                 assert_se(format_timestamp_us(buf, sizeof(buf), x));
 342                 log_info("%s", buf);
 343                 assert_se(parse_timestamp(buf, &y) >= 0);
 344                 assert_se(x == y);
 345
 346                 assert_se(format_timestamp_us_utc(buf, sizeof(buf), x));
 347                 log_info("%s", buf);
 348                 assert_se(parse_timestamp(buf, &y) >= 0);
 349                 assert_se(x == y);
 350
 351                 assert_se(format_timestamp_relative(buf, sizeof(buf), x));
 352                 log_info("%s", buf);
 353                 assert_se(parse_timestamp(buf, &y) >= 0);
 354
 355                 /* The two calls above will run with a slightly different local time. Make sure we are in the same
 356                  * range however, but give enough leeway that this is unlikely to explode. And of course,
 357                  * format_timestamp_relative() scales the accuracy with the distance from the current time up to one
 358                  * month, cover for that too. */
 359                 assert_se(y > x ? y - x : x - y <= USEC_PER_MONTH + USEC_PER_DAY);
 360         }
 361 }
 362
 363 static void test_format_timestamp_utc_one(usec_t val, const char *result) {
 364         char buf[FORMAT_TIMESTAMP_MAX];
 365         const char *t;
 366
 367         t = format_timestamp_utc(buf, sizeof(buf), val);
 368         assert_se(streq_ptr(t, result));
 369 }
 370
 371 static void test_format_timestamp_utc(void) {
 372         log_info("/* %s */", __func__);
 373
 374         test_format_timestamp_utc_one(0, NULL);
 375         test_format_timestamp_utc_one(1, "Thu 1970-01-01 00:00:00 UTC");
 376         test_format_timestamp_utc_one(USEC_PER_SEC, "Thu 1970-01-01 00:00:01 UTC");
 377
 378 #if SIZEOF_TIME_T == 8
 379         test_format_timestamp_utc_one(USEC_TIMESTAMP_FORMATTABLE_MAX, "Thu 9999-12-30 23:59:59 UTC");
 380         test_format_timestamp_utc_one(USEC_TIMESTAMP_FORMATTABLE_MAX + 1, "--- XXXX-XX-XX XX:XX:XX");
 381 #elif SIZEOF_TIME_T == 4
 382         test_format_timestamp_utc_one(USEC_TIMESTAMP_FORMATTABLE_MAX, "Tue 2038-01-19 03:14:07 UTC");
 383         test_format_timestamp_utc_one(USEC_TIMESTAMP_FORMATTABLE_MAX + 1, "--- XXXX-XX-XX XX:XX:XX");
 384 #endif
 385
 386         test_format_timestamp_utc_one(USEC_INFINITY, NULL);
 387 }
 388
 389 static void test_deserialize_dual_timestamp(void) {
 390         int r;
 391         dual_timestamp t;
 392
 393         log_info("/* %s */", __func__);
 394
 395         r = deserialize_dual_timestamp("1234 5678", &t);
 396         assert_se(r == 0);
 397         assert_se(t.realtime == 1234);
 398         assert_se(t.monotonic == 5678);
 399
 400         r = deserialize_dual_timestamp("1234x 5678", &t);
 401         assert_se(r == -EINVAL);
 402
 403         r = deserialize_dual_timestamp("1234 5678y", &t);
 404         assert_se(r == -EINVAL);
 405
 406         r = deserialize_dual_timestamp("-1234 5678", &t);
 407         assert_se(r == -EINVAL);
 408
 409         r = deserialize_dual_timestamp("1234 -5678", &t);
 410         assert_se(r == -EINVAL);
 411
 412         /* Check that output wasn't modified. */
 413         assert_se(t.realtime == 1234);
 414         assert_se(t.monotonic == 5678);
 415
 416         r = deserialize_dual_timestamp("+123 567", &t);
 417         assert_se(r == 0);
 418         assert_se(t.realtime == 123);
 419         assert_se(t.monotonic == 567);
 420
 421         /* Check that we get "infinity" on overflow. */
 422         r = deserialize_dual_timestamp("18446744073709551617 0", &t);
 423         assert_se(r == 0);
 424         assert_se(t.realtime == USEC_INFINITY);
 425         assert_se(t.monotonic == 0);
 426 }
 427
 428 static void assert_similar(usec_t a, usec_t b) {
 429         usec_t d;
 430
 431         if (a > b)
 432                 d = a - b;
 433         else
 434                 d = b - a;
 435
 436         assert_se(d < 10*USEC_PER_SEC);
 437 }
 438
 439 static void test_usec_shift_clock(void) {
 440         usec_t rt, mn, bt;
 441
 442         log_info("/* %s */", __func__);
 443
 444         rt = now(CLOCK_REALTIME);
 445         mn = now(CLOCK_MONOTONIC);
 446         bt = now(clock_boottime_or_monotonic());
 447
 448         assert_se(usec_shift_clock(USEC_INFINITY, CLOCK_REALTIME, CLOCK_MONOTONIC) == USEC_INFINITY);
 449
 450         assert_similar(usec_shift_clock(rt + USEC_PER_HOUR, CLOCK_REALTIME, CLOCK_MONOTONIC), mn + USEC_PER_HOUR);
 451         assert_similar(usec_shift_clock(rt + 2*USEC_PER_HOUR, CLOCK_REALTIME, clock_boottime_or_monotonic()), bt + 2*USEC_PER_HOUR);
 452         assert_se(usec_shift_clock(rt + 3*USEC_PER_HOUR, CLOCK_REALTIME, CLOCK_REALTIME_ALARM) == rt + 3*USEC_PER_HOUR);
 453
 454         assert_similar(usec_shift_clock(mn + 4*USEC_PER_HOUR, CLOCK_MONOTONIC, CLOCK_REALTIME_ALARM), rt + 4*USEC_PER_HOUR);
 455         assert_similar(usec_shift_clock(mn + 5*USEC_PER_HOUR, CLOCK_MONOTONIC, clock_boottime_or_monotonic()), bt + 5*USEC_PER_HOUR);
 456         assert_se(usec_shift_clock(mn + 6*USEC_PER_HOUR, CLOCK_MONOTONIC, CLOCK_MONOTONIC) == mn + 6*USEC_PER_HOUR);
 457
 458         assert_similar(usec_shift_clock(bt + 7*USEC_PER_HOUR, clock_boottime_or_monotonic(), CLOCK_MONOTONIC), mn + 7*USEC_PER_HOUR);
 459         assert_similar(usec_shift_clock(bt + 8*USEC_PER_HOUR, clock_boottime_or_monotonic(), CLOCK_REALTIME_ALARM), rt + 8*USEC_PER_HOUR);
 460         assert_se(usec_shift_clock(bt + 9*USEC_PER_HOUR, clock_boottime_or_monotonic(), clock_boottime_or_monotonic()) == bt + 9*USEC_PER_HOUR);
 461
 462         if (mn > USEC_PER_MINUTE) {
 463                 assert_similar(usec_shift_clock(rt - 30 * USEC_PER_SEC, CLOCK_REALTIME_ALARM, CLOCK_MONOTONIC), mn - 30 * USEC_PER_SEC);
 464                 assert_similar(usec_shift_clock(rt - 50 * USEC_PER_SEC, CLOCK_REALTIME, clock_boottime_or_monotonic()), bt - 50 * USEC_PER_SEC);
 465         }
 466 }
 467
 468 static void test_in_utc_timezone(void) {
 469         log_info("/* %s */", __func__);
 470
 471         assert_se(setenv("TZ", ":UTC", 1) >= 0);
 472         assert_se(in_utc_timezone());
 473         assert_se(streq(tzname[0], "UTC"));
 474         assert_se(streq(tzname[1], "UTC"));
 475         assert_se(timezone == 0);
 476         assert_se(daylight == 0);
 477
 478         assert_se(setenv("TZ", ":Europe/Berlin", 1) >= 0);
 479         assert_se(!in_utc_timezone());
 480         assert_se(streq(tzname[0], "CET"));
 481         assert_se(streq(tzname[1], "CEST"));
 482
 483         assert_se(unsetenv("TZ") >= 0);
 484 }
 485
 486 static void test_map_clock_usec(void) {
 487         usec_t nowr, x, y, z;
 488
 489         log_info("/* %s */", __func__);
 490         nowr = now(CLOCK_REALTIME);
 491
 492         x = nowr; /* right now */
 493         y = map_clock_usec(x, CLOCK_REALTIME, CLOCK_MONOTONIC);
 494         z = map_clock_usec(y, CLOCK_MONOTONIC, CLOCK_REALTIME);
 495         /* Converting forth and back will introduce inaccuracies, since we cannot query both clocks atomically, but it should be small. Even on the slowest CI smaller than 1h */
 496
 497         assert_se((z > x ? z - x : x - z) < USEC_PER_HOUR);
 498
 499         assert_se(nowr < USEC_INFINITY - USEC_PER_DAY*7); /* overflow check */
 500         x = nowr + USEC_PER_DAY*7; /* 1 week from now */
 501         y = map_clock_usec(x, CLOCK_REALTIME, CLOCK_MONOTONIC);
 502         assert_se(y > 0 && y < USEC_INFINITY);
 503         z = map_clock_usec(y, CLOCK_MONOTONIC, CLOCK_REALTIME);
 504         assert_se(z > 0 && z < USEC_INFINITY);
 505         assert_se((z > x ? z - x : x - z) < USEC_PER_HOUR);
 506
 507         assert_se(nowr > USEC_PER_DAY * 7); /* underflow check */
 508         x = nowr - USEC_PER_DAY*7; /* 1 week ago */
 509         y = map_clock_usec(x, CLOCK_REALTIME, CLOCK_MONOTONIC);
 510         if (y != 0) { /* might underflow if machine is not up long enough for the monotonic clock to be beyond 1w */
 511                 assert_se(y < USEC_INFINITY);
 512                 z = map_clock_usec(y, CLOCK_MONOTONIC, CLOCK_REALTIME);
 513                 assert_se(z > 0 && z < USEC_INFINITY);
 514                 assert_se((z > x ? z - x : x - z) < USEC_PER_HOUR);
 515         }
 516 }
 517
 518 int main(int argc, char *argv[]) {
 519         test_setup_logging(LOG_INFO);
 520
 521         log_info("realtime=" USEC_FMT "\n"
 522                  "monotonic=" USEC_FMT "\n"
 523                  "boottime=" USEC_FMT "\n",
 524                  now(CLOCK_REALTIME),
 525                  now(CLOCK_MONOTONIC),
 526                  now(clock_boottime_or_monotonic()));
 527
 528         test_parse_sec();
 529         test_parse_sec_fix_0();
 530         test_parse_sec_def_infinity();
 531         test_parse_time();
 532         test_parse_nsec();
 533         test_format_timespan(1);
 534         test_format_timespan(USEC_PER_MSEC);
 535         test_format_timespan(USEC_PER_SEC);
 536         test_timezone_is_valid();
 537         test_get_timezones();
 538         test_usec_add();
 539         test_usec_sub_signed();
 540         test_usec_sub_unsigned();
 541         test_format_timestamp();
 542         test_format_timestamp_utc();
 543         test_deserialize_dual_timestamp();
 544         test_usec_shift_clock();
 545         test_in_utc_timezone();
 546         test_map_clock_usec();
 547
 548         /* Ensure time_t is signed */
 549         assert_cc((time_t) -1 < (time_t) 1);
 550
 551         /* Ensure TIME_T_MAX works correctly */
 552         uintmax_t x = TIME_T_MAX;
 553         x++;
 554         assert((time_t) x < 0);
 555
 556         return 0;
 557 }