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