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