base/time/time_unittest.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/time/time.h"
   6
   7 #include <time.h>
   8
   9 #include <string>
  10
  11 #include "base/compiler_specific.h"
  12 #include "base/logging.h"
  13 #include "base/strings/stringprintf.h"
  14 #include "base/threading/platform_thread.h"
  15 #include "build/build_config.h"
  16 #include "testing/gtest/include/gtest/gtest.h"
  17
  18 namespace base {
  19
  20 namespace {
  21
  22 // Specialized test fixture allowing time strings without timezones to be
  23 // tested by comparing them to a known time in the local zone.
  24 // See also pr_time_unittests.cc
  25 class TimeTest : public testing::Test {
  26  protected:
  27   virtual void SetUp() override {
  28     // Use mktime to get a time_t, and turn it into a PRTime by converting
  29     // seconds to microseconds.  Use 15th Oct 2007 12:45:00 local.  This
  30     // must be a time guaranteed to be outside of a DST fallback hour in
  31     // any timezone.
  32     struct tm local_comparison_tm = {
  33       0,            // second
  34       45,           // minute
  35       12,           // hour
  36       15,           // day of month
  37       10 - 1,       // month
  38       2007 - 1900,  // year
  39       0,            // day of week (ignored, output only)
  40       0,            // day of year (ignored, output only)
  41       -1            // DST in effect, -1 tells mktime to figure it out
  42     };
  43
  44     time_t converted_time = mktime(&local_comparison_tm);
  45     ASSERT_GT(converted_time, 0);
  46     comparison_time_local_ = Time::FromTimeT(converted_time);
  47
  48     // time_t representation of 15th Oct 2007 12:45:00 PDT
  49     comparison_time_pdt_ = Time::FromTimeT(1192477500);
  50   }
  51
  52   Time comparison_time_local_;
  53   Time comparison_time_pdt_;
  54 };
  55
  56 // Test conversions to/from time_t and exploding/unexploding.
  57 TEST_F(TimeTest, TimeT) {
  58   // C library time and exploded time.
  59   time_t now_t_1 = time(NULL);
  60   struct tm tms;
  61 #if defined(OS_WIN)
  62   localtime_s(&tms, &now_t_1);
  63 #elif defined(OS_POSIX)
  64   localtime_r(&now_t_1, &tms);
  65 #endif
  66
  67   // Convert to ours.
  68   Time our_time_1 = Time::FromTimeT(now_t_1);
  69   Time::Exploded exploded;
  70   our_time_1.LocalExplode(&exploded);
  71
  72   // This will test both our exploding and our time_t -> Time conversion.
  73   EXPECT_EQ(tms.tm_year + 1900, exploded.year);
  74   EXPECT_EQ(tms.tm_mon + 1, exploded.month);
  75   EXPECT_EQ(tms.tm_mday, exploded.day_of_month);
  76   EXPECT_EQ(tms.tm_hour, exploded.hour);
  77   EXPECT_EQ(tms.tm_min, exploded.minute);
  78   EXPECT_EQ(tms.tm_sec, exploded.second);
  79
  80   // Convert exploded back to the time struct.
  81   Time our_time_2 = Time::FromLocalExploded(exploded);
  82   EXPECT_TRUE(our_time_1 == our_time_2);
  83
  84   time_t now_t_2 = our_time_2.ToTimeT();
  85   EXPECT_EQ(now_t_1, now_t_2);
  86
  87   EXPECT_EQ(10, Time().FromTimeT(10).ToTimeT());
  88   EXPECT_EQ(10.0, Time().FromTimeT(10).ToDoubleT());
  89
  90   // Conversions of 0 should stay 0.
  91   EXPECT_EQ(0, Time().ToTimeT());
  92   EXPECT_EQ(0, Time::FromTimeT(0).ToInternalValue());
  93 }
  94
  95 // Test conversions to/from javascript time.
  96 TEST_F(TimeTest, JsTime) {
  97   Time epoch = Time::FromJsTime(0.0);
  98   EXPECT_EQ(epoch, Time::UnixEpoch());
  99   Time t = Time::FromJsTime(700000.3);
 100   EXPECT_EQ(700.0003, t.ToDoubleT());
 101   t = Time::FromDoubleT(800.73);
 102   EXPECT_EQ(800730.0, t.ToJsTime());
 103 }
 104
 105 #if defined(OS_POSIX)
 106 TEST_F(TimeTest, FromTimeVal) {
 107   Time now = Time::Now();
 108   Time also_now = Time::FromTimeVal(now.ToTimeVal());
 109   EXPECT_EQ(now, also_now);
 110 }
 111 #endif  // OS_POSIX
 112
 113 TEST_F(TimeTest, FromExplodedWithMilliseconds) {
 114   // Some platform implementations of FromExploded are liable to drop
 115   // milliseconds if we aren't careful.
 116   Time now = Time::NowFromSystemTime();
 117   Time::Exploded exploded1 = {0};
 118   now.UTCExplode(&exploded1);
 119   exploded1.millisecond = 500;
 120   Time time = Time::FromUTCExploded(exploded1);
 121   Time::Exploded exploded2 = {0};
 122   time.UTCExplode(&exploded2);
 123   EXPECT_EQ(exploded1.millisecond, exploded2.millisecond);
 124 }
 125
 126 TEST_F(TimeTest, ZeroIsSymmetric) {
 127   Time zero_time(Time::FromTimeT(0));
 128   EXPECT_EQ(0, zero_time.ToTimeT());
 129
 130   EXPECT_EQ(0.0, zero_time.ToDoubleT());
 131 }
 132
 133 TEST_F(TimeTest, LocalExplode) {
 134   Time a = Time::Now();
 135   Time::Exploded exploded;
 136   a.LocalExplode(&exploded);
 137
 138   Time b = Time::FromLocalExploded(exploded);
 139
 140   // The exploded structure doesn't have microseconds, and on Mac & Linux, the
 141   // internal OS conversion uses seconds, which will cause truncation. So we
 142   // can only make sure that the delta is within one second.
 143   EXPECT_TRUE((a - b) < TimeDelta::FromSeconds(1));
 144 }
 145
 146 TEST_F(TimeTest, UTCExplode) {
 147   Time a = Time::Now();
 148   Time::Exploded exploded;
 149   a.UTCExplode(&exploded);
 150
 151   Time b = Time::FromUTCExploded(exploded);
 152   EXPECT_TRUE((a - b) < TimeDelta::FromSeconds(1));
 153 }
 154
 155 TEST_F(TimeTest, LocalMidnight) {
 156   Time::Exploded exploded;
 157   Time::Now().LocalMidnight().LocalExplode(&exploded);
 158   EXPECT_EQ(0, exploded.hour);
 159   EXPECT_EQ(0, exploded.minute);
 160   EXPECT_EQ(0, exploded.second);
 161   EXPECT_EQ(0, exploded.millisecond);
 162 }
 163
 164 TEST_F(TimeTest, ParseTimeTest1) {
 165   time_t current_time = 0;
 166   time(&current_time);
 167
 168   const int BUFFER_SIZE = 64;
 169   struct tm local_time = {0};
 170   char time_buf[BUFFER_SIZE] = {0};
 171 #if defined(OS_WIN)
 172   localtime_s(&local_time, &current_time);
 173   asctime_s(time_buf, arraysize(time_buf), &local_time);
 174 #elif defined(OS_POSIX)
 175   localtime_r(&current_time, &local_time);
 176   asctime_r(&local_time, time_buf);
 177 #endif
 178
 179   Time parsed_time;
 180   EXPECT_TRUE(Time::FromString(time_buf, &parsed_time));
 181   EXPECT_EQ(current_time, parsed_time.ToTimeT());
 182 }
 183
 184 TEST_F(TimeTest, DayOfWeekSunday) {
 185   Time time;
 186   EXPECT_TRUE(Time::FromString("Sun, 06 May 2012 12:00:00 GMT", &time));
 187   Time::Exploded exploded;
 188   time.UTCExplode(&exploded);
 189   EXPECT_EQ(0, exploded.day_of_week);
 190 }
 191
 192 TEST_F(TimeTest, DayOfWeekWednesday) {
 193   Time time;
 194   EXPECT_TRUE(Time::FromString("Wed, 09 May 2012 12:00:00 GMT", &time));
 195   Time::Exploded exploded;
 196   time.UTCExplode(&exploded);
 197   EXPECT_EQ(3, exploded.day_of_week);
 198 }
 199
 200 TEST_F(TimeTest, DayOfWeekSaturday) {
 201   Time time;
 202   EXPECT_TRUE(Time::FromString("Sat, 12 May 2012 12:00:00 GMT", &time));
 203   Time::Exploded exploded;
 204   time.UTCExplode(&exploded);
 205   EXPECT_EQ(6, exploded.day_of_week);
 206 }
 207
 208 TEST_F(TimeTest, ParseTimeTest2) {
 209   Time parsed_time;
 210   EXPECT_TRUE(Time::FromString("Mon, 15 Oct 2007 19:45:00 GMT", &parsed_time));
 211   EXPECT_EQ(comparison_time_pdt_, parsed_time);
 212 }
 213
 214 TEST_F(TimeTest, ParseTimeTest3) {
 215   Time parsed_time;
 216   EXPECT_TRUE(Time::FromString("15 Oct 07 12:45:00", &parsed_time));
 217   EXPECT_EQ(comparison_time_local_, parsed_time);
 218 }
 219
 220 TEST_F(TimeTest, ParseTimeTest4) {
 221   Time parsed_time;
 222   EXPECT_TRUE(Time::FromString("15 Oct 07 19:45 GMT", &parsed_time));
 223   EXPECT_EQ(comparison_time_pdt_, parsed_time);
 224 }
 225
 226 TEST_F(TimeTest, ParseTimeTest5) {
 227   Time parsed_time;
 228   EXPECT_TRUE(Time::FromString("Mon Oct 15 12:45 PDT 2007", &parsed_time));
 229   EXPECT_EQ(comparison_time_pdt_, parsed_time);
 230 }
 231
 232 TEST_F(TimeTest, ParseTimeTest6) {
 233   Time parsed_time;
 234   EXPECT_TRUE(Time::FromString("Monday, Oct 15, 2007 12:45 PM", &parsed_time));
 235   EXPECT_EQ(comparison_time_local_, parsed_time);
 236 }
 237
 238 TEST_F(TimeTest, ParseTimeTest7) {
 239   Time parsed_time;
 240   EXPECT_TRUE(Time::FromString("10/15/07 12:45:00 PM", &parsed_time));
 241   EXPECT_EQ(comparison_time_local_, parsed_time);
 242 }
 243
 244 TEST_F(TimeTest, ParseTimeTest8) {
 245   Time parsed_time;
 246   EXPECT_TRUE(Time::FromString("15-OCT-2007 12:45pm", &parsed_time));
 247   EXPECT_EQ(comparison_time_local_, parsed_time);
 248 }
 249
 250 TEST_F(TimeTest, ParseTimeTest9) {
 251   Time parsed_time;
 252   EXPECT_TRUE(Time::FromString("16 Oct 2007 4:45-JST (Tuesday)", &parsed_time));
 253   EXPECT_EQ(comparison_time_pdt_, parsed_time);
 254 }
 255
 256 TEST_F(TimeTest, ParseTimeTest10) {
 257   Time parsed_time;
 258   EXPECT_TRUE(Time::FromString("15/10/07 12:45", &parsed_time));
 259   EXPECT_EQ(parsed_time, comparison_time_local_);
 260 }
 261
 262 // Test some of edge cases around epoch, etc.
 263 TEST_F(TimeTest, ParseTimeTestEpoch0) {
 264   Time parsed_time;
 265
 266   // time_t == epoch == 0
 267   EXPECT_TRUE(Time::FromString("Thu Jan 01 01:00:00 +0100 1970",
 268                                &parsed_time));
 269   EXPECT_EQ(0, parsed_time.ToTimeT());
 270   EXPECT_TRUE(Time::FromString("Thu Jan 01 00:00:00 GMT 1970",
 271                                &parsed_time));
 272   EXPECT_EQ(0, parsed_time.ToTimeT());
 273 }
 274
 275 TEST_F(TimeTest, ParseTimeTestEpoch1) {
 276   Time parsed_time;
 277
 278   // time_t == 1 second after epoch == 1
 279   EXPECT_TRUE(Time::FromString("Thu Jan 01 01:00:01 +0100 1970",
 280                                &parsed_time));
 281   EXPECT_EQ(1, parsed_time.ToTimeT());
 282   EXPECT_TRUE(Time::FromString("Thu Jan 01 00:00:01 GMT 1970",
 283                                &parsed_time));
 284   EXPECT_EQ(1, parsed_time.ToTimeT());
 285 }
 286
 287 TEST_F(TimeTest, ParseTimeTestEpoch2) {
 288   Time parsed_time;
 289
 290   // time_t == 2 seconds after epoch == 2
 291   EXPECT_TRUE(Time::FromString("Thu Jan 01 01:00:02 +0100 1970",
 292                                &parsed_time));
 293   EXPECT_EQ(2, parsed_time.ToTimeT());
 294   EXPECT_TRUE(Time::FromString("Thu Jan 01 00:00:02 GMT 1970",
 295                                &parsed_time));
 296   EXPECT_EQ(2, parsed_time.ToTimeT());
 297 }
 298
 299 TEST_F(TimeTest, ParseTimeTestEpochNeg1) {
 300   Time parsed_time;
 301
 302   // time_t == 1 second before epoch == -1
 303   EXPECT_TRUE(Time::FromString("Thu Jan 01 00:59:59 +0100 1970",
 304                                &parsed_time));
 305   EXPECT_EQ(-1, parsed_time.ToTimeT());
 306   EXPECT_TRUE(Time::FromString("Wed Dec 31 23:59:59 GMT 1969",
 307                                &parsed_time));
 308   EXPECT_EQ(-1, parsed_time.ToTimeT());
 309 }
 310
 311 // If time_t is 32 bits, a date after year 2038 will overflow time_t and
 312 // cause timegm() to return -1.  The parsed time should not be 1 second
 313 // before epoch.
 314 TEST_F(TimeTest, ParseTimeTestEpochNotNeg1) {
 315   Time parsed_time;
 316
 317   EXPECT_TRUE(Time::FromString("Wed Dec 31 23:59:59 GMT 2100",
 318                                &parsed_time));
 319   EXPECT_NE(-1, parsed_time.ToTimeT());
 320 }
 321
 322 TEST_F(TimeTest, ParseTimeTestEpochNeg2) {
 323   Time parsed_time;
 324
 325   // time_t == 2 seconds before epoch == -2
 326   EXPECT_TRUE(Time::FromString("Thu Jan 01 00:59:58 +0100 1970",
 327                                &parsed_time));
 328   EXPECT_EQ(-2, parsed_time.ToTimeT());
 329   EXPECT_TRUE(Time::FromString("Wed Dec 31 23:59:58 GMT 1969",
 330                                &parsed_time));
 331   EXPECT_EQ(-2, parsed_time.ToTimeT());
 332 }
 333
 334 TEST_F(TimeTest, ParseTimeTestEpoch1960) {
 335   Time parsed_time;
 336
 337   // time_t before Epoch, in 1960
 338   EXPECT_TRUE(Time::FromString("Wed Jun 29 19:40:01 +0100 1960",
 339                                &parsed_time));
 340   EXPECT_EQ(-299999999, parsed_time.ToTimeT());
 341   EXPECT_TRUE(Time::FromString("Wed Jun 29 18:40:01 GMT 1960",
 342                                &parsed_time));
 343   EXPECT_EQ(-299999999, parsed_time.ToTimeT());
 344   EXPECT_TRUE(Time::FromString("Wed Jun 29 17:40:01 GMT 1960",
 345                                &parsed_time));
 346   EXPECT_EQ(-300003599, parsed_time.ToTimeT());
 347 }
 348
 349 TEST_F(TimeTest, ParseTimeTestEmpty) {
 350   Time parsed_time;
 351   EXPECT_FALSE(Time::FromString("", &parsed_time));
 352 }
 353
 354 TEST_F(TimeTest, ParseTimeTestInvalidString) {
 355   Time parsed_time;
 356   EXPECT_FALSE(Time::FromString("Monday morning 2000", &parsed_time));
 357 }
 358
 359 TEST_F(TimeTest, ExplodeBeforeUnixEpoch) {
 360   static const int kUnixEpochYear = 1970;  // In case this changes (ha!).
 361   Time t;
 362   Time::Exploded exploded;
 363
 364   t = Time::UnixEpoch() - TimeDelta::FromMicroseconds(1);
 365   t.UTCExplode(&exploded);
 366   EXPECT_TRUE(exploded.HasValidValues());
 367   // Should be 1969-12-31 23:59:59 999 milliseconds (and 999 microseconds).
 368   EXPECT_EQ(kUnixEpochYear - 1, exploded.year);
 369   EXPECT_EQ(12, exploded.month);
 370   EXPECT_EQ(31, exploded.day_of_month);
 371   EXPECT_EQ(23, exploded.hour);
 372   EXPECT_EQ(59, exploded.minute);
 373   EXPECT_EQ(59, exploded.second);
 374   EXPECT_EQ(999, exploded.millisecond);
 375
 376   t = Time::UnixEpoch() - TimeDelta::FromMicroseconds(1000);
 377   t.UTCExplode(&exploded);
 378   EXPECT_TRUE(exploded.HasValidValues());
 379   // Should be 1969-12-31 23:59:59 999 milliseconds.
 380   EXPECT_EQ(kUnixEpochYear - 1, exploded.year);
 381   EXPECT_EQ(12, exploded.month);
 382   EXPECT_EQ(31, exploded.day_of_month);
 383   EXPECT_EQ(23, exploded.hour);
 384   EXPECT_EQ(59, exploded.minute);
 385   EXPECT_EQ(59, exploded.second);
 386   EXPECT_EQ(999, exploded.millisecond);
 387
 388   t = Time::UnixEpoch() - TimeDelta::FromMicroseconds(1001);
 389   t.UTCExplode(&exploded);
 390   EXPECT_TRUE(exploded.HasValidValues());
 391   // Should be 1969-12-31 23:59:59 998 milliseconds (and 999 microseconds).
 392   EXPECT_EQ(kUnixEpochYear - 1, exploded.year);
 393   EXPECT_EQ(12, exploded.month);
 394   EXPECT_EQ(31, exploded.day_of_month);
 395   EXPECT_EQ(23, exploded.hour);
 396   EXPECT_EQ(59, exploded.minute);
 397   EXPECT_EQ(59, exploded.second);
 398   EXPECT_EQ(998, exploded.millisecond);
 399
 400   t = Time::UnixEpoch() - TimeDelta::FromMilliseconds(1000);
 401   t.UTCExplode(&exploded);
 402   EXPECT_TRUE(exploded.HasValidValues());
 403   // Should be 1969-12-31 23:59:59.
 404   EXPECT_EQ(kUnixEpochYear - 1, exploded.year);
 405   EXPECT_EQ(12, exploded.month);
 406   EXPECT_EQ(31, exploded.day_of_month);
 407   EXPECT_EQ(23, exploded.hour);
 408   EXPECT_EQ(59, exploded.minute);
 409   EXPECT_EQ(59, exploded.second);
 410   EXPECT_EQ(0, exploded.millisecond);
 411
 412   t = Time::UnixEpoch() - TimeDelta::FromMilliseconds(1001);
 413   t.UTCExplode(&exploded);
 414   EXPECT_TRUE(exploded.HasValidValues());
 415   // Should be 1969-12-31 23:59:58 999 milliseconds.
 416   EXPECT_EQ(kUnixEpochYear - 1, exploded.year);
 417   EXPECT_EQ(12, exploded.month);
 418   EXPECT_EQ(31, exploded.day_of_month);
 419   EXPECT_EQ(23, exploded.hour);
 420   EXPECT_EQ(59, exploded.minute);
 421   EXPECT_EQ(58, exploded.second);
 422   EXPECT_EQ(999, exploded.millisecond);
 423
 424   // Make sure we still handle at/after Unix epoch correctly.
 425   t = Time::UnixEpoch();
 426   t.UTCExplode(&exploded);
 427   EXPECT_TRUE(exploded.HasValidValues());
 428   // Should be 1970-12-31 00:00:00 0 milliseconds.
 429   EXPECT_EQ(kUnixEpochYear, exploded.year);
 430   EXPECT_EQ(1, exploded.month);
 431   EXPECT_EQ(1, exploded.day_of_month);
 432   EXPECT_EQ(0, exploded.hour);
 433   EXPECT_EQ(0, exploded.minute);
 434   EXPECT_EQ(0, exploded.second);
 435   EXPECT_EQ(0, exploded.millisecond);
 436
 437   t = Time::UnixEpoch() + TimeDelta::FromMicroseconds(1);
 438   t.UTCExplode(&exploded);
 439   EXPECT_TRUE(exploded.HasValidValues());
 440   // Should be 1970-01-01 00:00:00 0 milliseconds (and 1 microsecond).
 441   EXPECT_EQ(kUnixEpochYear, exploded.year);
 442   EXPECT_EQ(1, exploded.month);
 443   EXPECT_EQ(1, exploded.day_of_month);
 444   EXPECT_EQ(0, exploded.hour);
 445   EXPECT_EQ(0, exploded.minute);
 446   EXPECT_EQ(0, exploded.second);
 447   EXPECT_EQ(0, exploded.millisecond);
 448
 449   t = Time::UnixEpoch() + TimeDelta::FromMicroseconds(1000);
 450   t.UTCExplode(&exploded);
 451   EXPECT_TRUE(exploded.HasValidValues());
 452   // Should be 1970-01-01 00:00:00 1 millisecond.
 453   EXPECT_EQ(kUnixEpochYear, exploded.year);
 454   EXPECT_EQ(1, exploded.month);
 455   EXPECT_EQ(1, exploded.day_of_month);
 456   EXPECT_EQ(0, exploded.hour);
 457   EXPECT_EQ(0, exploded.minute);
 458   EXPECT_EQ(0, exploded.second);
 459   EXPECT_EQ(1, exploded.millisecond);
 460
 461   t = Time::UnixEpoch() + TimeDelta::FromMilliseconds(1000);
 462   t.UTCExplode(&exploded);
 463   EXPECT_TRUE(exploded.HasValidValues());
 464   // Should be 1970-01-01 00:00:01.
 465   EXPECT_EQ(kUnixEpochYear, exploded.year);
 466   EXPECT_EQ(1, exploded.month);
 467   EXPECT_EQ(1, exploded.day_of_month);
 468   EXPECT_EQ(0, exploded.hour);
 469   EXPECT_EQ(0, exploded.minute);
 470   EXPECT_EQ(1, exploded.second);
 471   EXPECT_EQ(0, exploded.millisecond);
 472
 473   t = Time::UnixEpoch() + TimeDelta::FromMilliseconds(1001);
 474   t.UTCExplode(&exploded);
 475   EXPECT_TRUE(exploded.HasValidValues());
 476   // Should be 1970-01-01 00:00:01 1 millisecond.
 477   EXPECT_EQ(kUnixEpochYear, exploded.year);
 478   EXPECT_EQ(1, exploded.month);
 479   EXPECT_EQ(1, exploded.day_of_month);
 480   EXPECT_EQ(0, exploded.hour);
 481   EXPECT_EQ(0, exploded.minute);
 482   EXPECT_EQ(1, exploded.second);
 483   EXPECT_EQ(1, exploded.millisecond);
 484 }
 485
 486 TEST_F(TimeTest, TimeDeltaMax) {
 487   TimeDelta max = TimeDelta::Max();
 488   EXPECT_TRUE(max.is_max());
 489   EXPECT_EQ(max, TimeDelta::Max());
 490   EXPECT_GT(max, TimeDelta::FromDays(100 * 365));
 491   EXPECT_GT(max, TimeDelta());
 492 }
 493
 494 TEST_F(TimeTest, TimeDeltaMaxConversions) {
 495   TimeDelta t = TimeDelta::Max();
 496   EXPECT_EQ(std::numeric_limits<int64>::max(), t.ToInternalValue());
 497
 498   EXPECT_EQ(std::numeric_limits<int>::max(), t.InDays());
 499   EXPECT_EQ(std::numeric_limits<int>::max(), t.InHours());
 500   EXPECT_EQ(std::numeric_limits<int>::max(), t.InMinutes());
 501   EXPECT_EQ(std::numeric_limits<double>::infinity(), t.InSecondsF());
 502   EXPECT_EQ(std::numeric_limits<int64>::max(), t.InSeconds());
 503   EXPECT_EQ(std::numeric_limits<double>::infinity(), t.InMillisecondsF());
 504   EXPECT_EQ(std::numeric_limits<int64>::max(), t.InMilliseconds());
 505   EXPECT_EQ(std::numeric_limits<int64>::max(), t.InMillisecondsRoundedUp());
 506
 507   t = TimeDelta::FromDays(std::numeric_limits<int>::max());
 508   EXPECT_TRUE(t.is_max());
 509
 510   t = TimeDelta::FromHours(std::numeric_limits<int>::max());
 511   EXPECT_TRUE(t.is_max());
 512
 513   t = TimeDelta::FromMinutes(std::numeric_limits<int>::max());
 514   EXPECT_TRUE(t.is_max());
 515
 516   t = TimeDelta::FromSeconds(std::numeric_limits<int64>::max());
 517   EXPECT_TRUE(t.is_max());
 518
 519   t = TimeDelta::FromMilliseconds(std::numeric_limits<int64>::max());
 520   EXPECT_TRUE(t.is_max());
 521
 522   t = TimeDelta::FromSecondsD(std::numeric_limits<double>::infinity());
 523   EXPECT_TRUE(t.is_max());
 524
 525   t = TimeDelta::FromMillisecondsD(std::numeric_limits<double>::infinity());
 526   EXPECT_TRUE(t.is_max());
 527
 528   t = TimeDelta::FromMicroseconds(std::numeric_limits<int64>::max());
 529   EXPECT_TRUE(t.is_max());
 530 }
 531
 532 TEST_F(TimeTest, Max) {
 533   Time max = Time::Max();
 534   EXPECT_TRUE(max.is_max());
 535   EXPECT_EQ(max, Time::Max());
 536   EXPECT_GT(max, Time::Now());
 537   EXPECT_GT(max, Time());
 538 }
 539
 540 TEST_F(TimeTest, MaxConversions) {
 541   Time t = Time::Max();
 542   EXPECT_EQ(std::numeric_limits<int64>::max(), t.ToInternalValue());
 543
 544   t = Time::FromDoubleT(std::numeric_limits<double>::infinity());
 545   EXPECT_TRUE(t.is_max());
 546   EXPECT_EQ(std::numeric_limits<double>::infinity(), t.ToDoubleT());
 547
 548   t = Time::FromJsTime(std::numeric_limits<double>::infinity());
 549   EXPECT_TRUE(t.is_max());
 550   EXPECT_EQ(std::numeric_limits<double>::infinity(), t.ToJsTime());
 551
 552   t = Time::FromTimeT(std::numeric_limits<time_t>::max());
 553   EXPECT_TRUE(t.is_max());
 554   EXPECT_EQ(std::numeric_limits<time_t>::max(), t.ToTimeT());
 555
 556 #if defined(OS_POSIX)
 557   struct timeval tval;
 558   tval.tv_sec = std::numeric_limits<time_t>::max();
 559   tval.tv_usec = static_cast<suseconds_t>(Time::kMicrosecondsPerSecond) - 1;
 560   t = Time::FromTimeVal(tval);
 561   EXPECT_TRUE(t.is_max());
 562   tval = t.ToTimeVal();
 563   EXPECT_EQ(std::numeric_limits<time_t>::max(), tval.tv_sec);
 564   EXPECT_EQ(static_cast<suseconds_t>(Time::kMicrosecondsPerSecond) - 1,
 565       tval.tv_usec);
 566 #endif
 567
 568 #if defined(OS_MACOSX)
 569   t = Time::FromCFAbsoluteTime(std::numeric_limits<CFAbsoluteTime>::infinity());
 570   EXPECT_TRUE(t.is_max());
 571   EXPECT_EQ(std::numeric_limits<CFAbsoluteTime>::infinity(),
 572             t.ToCFAbsoluteTime());
 573 #endif
 574
 575 #if defined(OS_WIN)
 576   FILETIME ftime;
 577   ftime.dwHighDateTime = std::numeric_limits<DWORD>::max();
 578   ftime.dwLowDateTime = std::numeric_limits<DWORD>::max();
 579   t = Time::FromFileTime(ftime);
 580   EXPECT_TRUE(t.is_max());
 581   ftime = t.ToFileTime();
 582   EXPECT_EQ(std::numeric_limits<DWORD>::max(), ftime.dwHighDateTime);
 583   EXPECT_EQ(std::numeric_limits<DWORD>::max(), ftime.dwLowDateTime);
 584 #endif
 585 }
 586
 587 #if defined(OS_MACOSX)
 588 TEST_F(TimeTest, TimeTOverflow) {
 589   Time t = Time::FromInternalValue(std::numeric_limits<int64>::max() - 1);
 590   EXPECT_FALSE(t.is_max());
 591   EXPECT_EQ(std::numeric_limits<time_t>::max(), t.ToTimeT());
 592 }
 593 #endif
 594
 595 #if defined(OS_ANDROID)
 596 TEST_F(TimeTest, FromLocalExplodedCrashOnAndroid) {
 597   // This crashed inside Time:: FromLocalExploded() on Android 4.1.2.
 598   // See http://crbug.com/287821
 599   Time::Exploded midnight = {2013,  // year
 600                              10,    // month
 601                              0,     // day_of_week
 602                              13,    // day_of_month
 603                              0,     // hour
 604                              0,     // minute
 605                              0,     // second
 606   };
 607   // The string passed to putenv() must be a char* and the documentation states
 608   // that it 'becomes part of the environment', so use a static buffer.
 609   static char buffer[] = "TZ=America/Santiago";
 610   putenv(buffer);
 611   tzset();
 612   Time t = Time::FromLocalExploded(midnight);
 613   EXPECT_EQ(1381633200, t.ToTimeT());
 614 }
 615 #endif  // OS_ANDROID
 616
 617 TEST(TimeTicks, Deltas) {
 618   for (int index = 0; index < 50; index++) {
 619     TimeTicks ticks_start = TimeTicks::Now();
 620     base::PlatformThread::Sleep(base::TimeDelta::FromMilliseconds(10));
 621     TimeTicks ticks_stop = TimeTicks::Now();
 622     TimeDelta delta = ticks_stop - ticks_start;
 623     // Note:  Although we asked for a 10ms sleep, if the
 624     // time clock has a finer granularity than the Sleep()
 625     // clock, it is quite possible to wakeup early.  Here
 626     // is how that works:
 627     //      Time(ms timer)      Time(us timer)
 628     //          5                   5010
 629     //          6                   6010
 630     //          7                   7010
 631     //          8                   8010
 632     //          9                   9000
 633     // Elapsed  4ms                 3990us
 634     //
 635     // Unfortunately, our InMilliseconds() function truncates
 636     // rather than rounds.  We should consider fixing this
 637     // so that our averages come out better.
 638     EXPECT_GE(delta.InMilliseconds(), 9);
 639     EXPECT_GE(delta.InMicroseconds(), 9000);
 640     EXPECT_EQ(delta.InSeconds(), 0);
 641   }
 642 }
 643
 644 static void HighResClockTest(TimeTicks (*GetTicks)()) {
 645 #if defined(OS_WIN)
 646   // HighResNow doesn't work on some systems.  Since the product still works
 647   // even if it doesn't work, it makes this entire test questionable.
 648   if (!TimeTicks::IsHighResClockWorking())
 649     return;
 650 #endif
 651
 652   // Why do we loop here?
 653   // We're trying to measure that intervals increment in a VERY small amount
 654   // of time --  less than 15ms.  Unfortunately, if we happen to have a
 655   // context switch in the middle of our test, the context switch could easily
 656   // exceed our limit.  So, we iterate on this several times.  As long as we're
 657   // able to detect the fine-granularity timers at least once, then the test
 658   // has succeeded.
 659
 660   const int kTargetGranularityUs = 15000;  // 15ms
 661
 662   bool success = false;
 663   int retries = 100;  // Arbitrary.
 664   TimeDelta delta;
 665   while (!success && retries--) {
 666     TimeTicks ticks_start = GetTicks();
 667     // Loop until we can detect that the clock has changed.  Non-HighRes timers
 668     // will increment in chunks, e.g. 15ms.  By spinning until we see a clock
 669     // change, we detect the minimum time between measurements.
 670     do {
 671       delta = GetTicks() - ticks_start;
 672     } while (delta.InMilliseconds() == 0);
 673
 674     if (delta.InMicroseconds() <= kTargetGranularityUs)
 675       success = true;
 676   }
 677
 678   // In high resolution mode, we expect to see the clock increment
 679   // in intervals less than 15ms.
 680   EXPECT_TRUE(success);
 681 }
 682
 683 TEST(TimeTicks, HighResNow) {
 684   HighResClockTest(&TimeTicks::HighResNow);
 685 }
 686
 687 // Fails frequently on Android http://crbug.com/352633 with:
 688 // Expected: (delta_thread.InMicroseconds()) > (0), actual: 0 vs 0
 689 #if defined(OS_ANDROID)
 690 #define MAYBE_ThreadNow DISABLED_ThreadNow
 691 #else
 692 #define MAYBE_ThreadNow ThreadNow
 693 #endif
 694 TEST(TimeTicks, MAYBE_ThreadNow) {
 695   if (TimeTicks::IsThreadNowSupported()) {
 696     TimeTicks begin = TimeTicks::Now();
 697     TimeTicks begin_thread = TimeTicks::ThreadNow();
 698     // Make sure that ThreadNow value is non-zero.
 699     EXPECT_GT(begin_thread, TimeTicks());
 700     // Sleep for 10 milliseconds to get the thread de-scheduled.
 701     base::PlatformThread::Sleep(base::TimeDelta::FromMilliseconds(10));
 702     TimeTicks end_thread = TimeTicks::ThreadNow();
 703     TimeTicks end = TimeTicks::Now();
 704     TimeDelta delta = end - begin;
 705     TimeDelta delta_thread = end_thread - begin_thread;
 706     // Make sure that some thread time have elapsed.
 707     EXPECT_GT(delta_thread.InMicroseconds(), 0);
 708     // But the thread time is at least 9ms less than clock time.
 709     TimeDelta difference = delta - delta_thread;
 710     EXPECT_GE(difference.InMicroseconds(), 9000);
 711   }
 712 }
 713
 714 TEST(TimeTicks, NowFromSystemTraceTime) {
 715   // Re-use HighResNow test for now since clock properties are identical.
 716   HighResClockTest(&TimeTicks::NowFromSystemTraceTime);
 717 }
 718
 719 TEST(TimeDelta, FromAndIn) {
 720   EXPECT_TRUE(TimeDelta::FromDays(2) == TimeDelta::FromHours(48));
 721   EXPECT_TRUE(TimeDelta::FromHours(3) == TimeDelta::FromMinutes(180));
 722   EXPECT_TRUE(TimeDelta::FromMinutes(2) == TimeDelta::FromSeconds(120));
 723   EXPECT_TRUE(TimeDelta::FromSeconds(2) == TimeDelta::FromMilliseconds(2000));
 724   EXPECT_TRUE(TimeDelta::FromMilliseconds(2) ==
 725               TimeDelta::FromMicroseconds(2000));
 726   EXPECT_TRUE(TimeDelta::FromSecondsD(2.3) ==
 727               TimeDelta::FromMilliseconds(2300));
 728   EXPECT_TRUE(TimeDelta::FromMillisecondsD(2.5) ==
 729               TimeDelta::FromMicroseconds(2500));
 730   EXPECT_EQ(13, TimeDelta::FromDays(13).InDays());
 731   EXPECT_EQ(13, TimeDelta::FromHours(13).InHours());
 732   EXPECT_EQ(13, TimeDelta::FromMinutes(13).InMinutes());
 733   EXPECT_EQ(13, TimeDelta::FromSeconds(13).InSeconds());
 734   EXPECT_EQ(13.0, TimeDelta::FromSeconds(13).InSecondsF());
 735   EXPECT_EQ(13, TimeDelta::FromMilliseconds(13).InMilliseconds());
 736   EXPECT_EQ(13.0, TimeDelta::FromMilliseconds(13).InMillisecondsF());
 737   EXPECT_EQ(13, TimeDelta::FromSecondsD(13.1).InSeconds());
 738   EXPECT_EQ(13.1, TimeDelta::FromSecondsD(13.1).InSecondsF());
 739   EXPECT_EQ(13, TimeDelta::FromMillisecondsD(13.3).InMilliseconds());
 740   EXPECT_EQ(13.3, TimeDelta::FromMillisecondsD(13.3).InMillisecondsF());
 741   EXPECT_EQ(13, TimeDelta::FromMicroseconds(13).InMicroseconds());
 742 }
 743
 744 #if defined(OS_POSIX)
 745 TEST(TimeDelta, TimeSpecConversion) {
 746   struct timespec result = TimeDelta::FromSeconds(0).ToTimeSpec();
 747   EXPECT_EQ(result.tv_sec, 0);
 748   EXPECT_EQ(result.tv_nsec, 0);
 749
 750   result = TimeDelta::FromSeconds(1).ToTimeSpec();
 751   EXPECT_EQ(result.tv_sec, 1);
 752   EXPECT_EQ(result.tv_nsec, 0);
 753
 754   result = TimeDelta::FromMicroseconds(1).ToTimeSpec();
 755   EXPECT_EQ(result.tv_sec, 0);
 756   EXPECT_EQ(result.tv_nsec, 1000);
 757
 758   result = TimeDelta::FromMicroseconds(
 759       Time::kMicrosecondsPerSecond + 1).ToTimeSpec();
 760   EXPECT_EQ(result.tv_sec, 1);
 761   EXPECT_EQ(result.tv_nsec, 1000);
 762 }
 763 #endif  // OS_POSIX
 764
 765 // Our internal time format is serialized in things like databases, so it's
 766 // important that it's consistent across all our platforms.  We use the 1601
 767 // Windows epoch as the internal format across all platforms.
 768 TEST(TimeDelta, WindowsEpoch) {
 769   Time::Exploded exploded;
 770   exploded.year = 1970;
 771   exploded.month = 1;
 772   exploded.day_of_week = 0;  // Should be unusued.
 773   exploded.day_of_month = 1;
 774   exploded.hour = 0;
 775   exploded.minute = 0;
 776   exploded.second = 0;
 777   exploded.millisecond = 0;
 778   Time t = Time::FromUTCExploded(exploded);
 779   // Unix 1970 epoch.
 780   EXPECT_EQ(GG_INT64_C(11644473600000000), t.ToInternalValue());
 781
 782   // We can't test 1601 epoch, since the system time functions on Linux
 783   // only compute years starting from 1900.
 784 }
 785
 786 // We could define this separately for Time, TimeTicks and TimeDelta but the
 787 // definitions would be identical anyway.
 788 template <class Any>
 789 std::string AnyToString(Any any) {
 790   std::ostringstream oss;
 791   oss << any;
 792   return oss.str();
 793 }
 794
 795 TEST(TimeDeltaLogging, DCheckEqCompiles) {
 796   DCHECK_EQ(TimeDelta(), TimeDelta());
 797 }
 798
 799 TEST(TimeDeltaLogging, EmptyIsZero) {
 800   TimeDelta zero;
 801   EXPECT_EQ("0s", AnyToString(zero));
 802 }
 803
 804 TEST(TimeDeltaLogging, FiveHundredMs) {
 805   TimeDelta five_hundred_ms = TimeDelta::FromMilliseconds(500);
 806   EXPECT_EQ("0.5s", AnyToString(five_hundred_ms));
 807 }
 808
 809 TEST(TimeDeltaLogging, MinusTenSeconds) {
 810   TimeDelta minus_ten_seconds = TimeDelta::FromSeconds(-10);
 811   EXPECT_EQ("-10s", AnyToString(minus_ten_seconds));
 812 }
 813
 814 TEST(TimeDeltaLogging, DoesNotMessUpFormattingFlags) {
 815   std::ostringstream oss;
 816   std::ios_base::fmtflags flags_before = oss.flags();
 817   oss << TimeDelta();
 818   EXPECT_EQ(flags_before, oss.flags());
 819 }
 820
 821 TEST(TimeDeltaLogging, DoesNotMakeStreamBad) {
 822   std::ostringstream oss;
 823   oss << TimeDelta();
 824   EXPECT_TRUE(oss.good());
 825 }
 826
 827 TEST(TimeLogging, DCheckEqCompiles) {
 828   DCHECK_EQ(Time(), Time());
 829 }
 830
 831 TEST(TimeLogging, ChromeBirthdate) {
 832   Time birthdate;
 833   ASSERT_TRUE(Time::FromString("Tue, 02 Sep 2008 09:42:18 GMT", &birthdate));
 834   EXPECT_EQ("2008-09-02 09:42:18.000 UTC", AnyToString(birthdate));
 835 }
 836
 837 TEST(TimeLogging, DoesNotMessUpFormattingFlags) {
 838   std::ostringstream oss;
 839   std::ios_base::fmtflags flags_before = oss.flags();
 840   oss << Time();
 841   EXPECT_EQ(flags_before, oss.flags());
 842 }
 843
 844 TEST(TimeLogging, DoesNotMakeStreamBad) {
 845   std::ostringstream oss;
 846   oss << Time();
 847   EXPECT_TRUE(oss.good());
 848 }
 849
 850 TEST(TimeTicksLogging, DCheckEqCompiles) {
 851   DCHECK_EQ(TimeTicks(), TimeTicks());
 852 }
 853
 854 TEST(TimeTicksLogging, ZeroTime) {
 855   TimeTicks zero;
 856   EXPECT_EQ("0 bogo-microseconds", AnyToString(zero));
 857 }
 858
 859 TEST(TimeTicksLogging, FortyYearsLater) {
 860   TimeTicks forty_years_later =
 861       TimeTicks() + TimeDelta::FromDays(365.25 * 40);
 862   EXPECT_EQ("1262304000000000 bogo-microseconds",
 863             AnyToString(forty_years_later));
 864 }
 865
 866 TEST(TimeTicksLogging, DoesNotMessUpFormattingFlags) {
 867   std::ostringstream oss;
 868   std::ios_base::fmtflags flags_before = oss.flags();
 869   oss << TimeTicks();
 870   EXPECT_EQ(flags_before, oss.flags());
 871 }
 872
 873 TEST(TimeTicksLogging, DoesNotMakeStreamBad) {
 874   std::ostringstream oss;
 875   oss << TimeTicks();
 876   EXPECT_TRUE(oss.good());
 877 }
 878
 879 }  // namespace
 880
 881 }  // namespace base