mcs/class/corlib/Test/System/TimeZoneInfoTest.cs

   1 /*
   2  * TimeZoneInfo.Tests
   3  *
   4  * Author(s)
   5  *      Stephane Delcroix <stephane@delcroix.org>
   6  *
   7  * Copyright 2011 Xamarin Inc.
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining
  10  * a copy of this software and associated documentation files (the
  11  * "Software"), to deal in the Software without restriction, including
  12  * without limitation the rights to use, copy, modify, merge, publish,
  13  * distribute, sublicense, and/or sell copies of the Software, and to
  14  * permit persons to whom the Software is furnished to do so, subject to
  15  * the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be
  18  * included in all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27  */
  28
  29 using System;
  30 using System.IO;
  31 using System.Runtime.InteropServices;
  32 using System.Runtime.Serialization.Formatters.Binary;
  33 using System.Collections;
  34 using System.Reflection;
  35 using System.Globalization;
  36
  37 using NUnit.Framework;
  38 namespace MonoTests.System
  39 {
  40         public class TimeZoneInfoTest
  41         {
  42                 static FieldInfo localField;
  43                 static FieldInfo cachedDataField;
  44                 static object localFieldObj;
  45
  46                 public static void SetLocal (TimeZoneInfo val)
  47                 {
  48                         if (localField == null) {
  49                                 if (Type.GetType ("Mono.Runtime") != null) {
  50                                         localField = typeof (TimeZoneInfo).GetField ("local",
  51                                                         BindingFlags.Static | BindingFlags.GetField | BindingFlags.NonPublic);
  52                                 } else {
  53                                         cachedDataField = typeof (TimeZoneInfo).GetField ("s_cachedData",
  54                                                         BindingFlags.Static | BindingFlags.GetField | BindingFlags.NonPublic);
  55
  56                                         localField = cachedDataField.FieldType.GetField ("m_localTimeZone",
  57                                                 BindingFlags.Instance | BindingFlags.GetField | BindingFlags.NonPublic);
  58                                 }
  59                         }
  60
  61                         if (cachedDataField != null)
  62                                 localFieldObj = cachedDataField.GetValue (null);
  63
  64                         localField.SetValue (localFieldObj, val);
  65                 }
  66
  67                 [TestFixture]
  68                 public class PropertiesTests
  69                 {
  70                         [Test]
  71                         public void GetLocal ()
  72                         {
  73                                 if (Environment.OSVersion.Platform != PlatformID.Unix)
  74                                         Assert.Ignore ("Not running on Unix.");
  75                                 TimeZoneInfo local = TimeZoneInfo.Local;
  76                                 Assert.IsNotNull (local);
  77                                 Assert.IsTrue (true);
  78                         }
  79
  80                         [DllImport ("libc")]
  81                         private static extern int readlink (string path, byte[] buffer, int buflen);
  82
  83                         [Test] // Covers #24958
  84                         public void LocalId ()
  85                         {
  86                                 byte[] buf = new byte [512];
  87
  88                                 var path = "/etc/localtime";
  89                                 try {
  90                                         var ret = readlink (path, buf, buf.Length);
  91                                         if (ret == -1)
  92                                                 return; // path is not a symbolic link, nothing to test
  93                                 } catch (DllNotFoundException e) {
  94                                         return;
  95                                 }
  96 #if !MONOTOUCH && !XAMMAC
  97                                 // this assumption is incorrect for iOS, tvO, watchOS and OSX
  98                                 Assert.IsTrue (TimeZoneInfo.Local.Id != "Local", "Local timezone id should not be \"Local\"");
  99 #endif
 100                         }
 101                 }
 102
 103                 [TestFixture]
 104                 public class CreateCustomTimezoneTests
 105                 {
 106                         [Test]
 107                         [ExpectedException (typeof (ArgumentNullException))]
 108                         public void IdIsNullException ()
 109                         {
 110                                 TimeZoneInfo.CreateCustomTimeZone (null, new TimeSpan (0), null, null);
 111                         }
 112
 113                         [Test]
 114                         [ExpectedException (typeof (ArgumentException))]
 115                         public void IdIsEmptyString ()
 116                         {
 117                                 TimeZoneInfo.CreateCustomTimeZone ("", new TimeSpan (0), null, null);
 118                         }
 119
 120                         [Test]
 121                         [ExpectedException (typeof (ArgumentException))]
 122                         public void OffsetIsNotMinutes ()
 123                         {
 124                                 TimeZoneInfo.CreateCustomTimeZone ("mytimezone", new TimeSpan (0, 0, 55), null, null);
 125                         }
 126
 127                         [Test]
 128                         [ExpectedException (typeof (ArgumentOutOfRangeException))]
 129                         public void OffsetTooBig ()
 130                         {
 131                                 TimeZoneInfo.CreateCustomTimeZone ("mytimezone", new TimeSpan (14, 1, 0), null, null);
 132                         }
 133
 134                         [Test]
 135                         [ExpectedException (typeof (ArgumentOutOfRangeException))]
 136                         public void OffsetTooSmall ()
 137                         {
 138                                 TimeZoneInfo.CreateCustomTimeZone ("mytimezone", - new TimeSpan (14, 1, 0), null, null);
 139                         }
 140
 141                 #if STRICT
 142                         [Test]
 143                         [ExpectedException (typeof (ArgumentException))]
 144                         public void IdLongerThan32 ()
 145                         {
 146                                 TimeZoneInfo.CreateCustomTimeZone ("12345678901234567890123456789012345", new TimeSpan (0), null, null);
 147                         }
 148                 #endif
 149
 150                         [Test]
 151                         [ExpectedException (typeof (InvalidTimeZoneException))]
 152                         public void AdjustmentRulesOverlap ()
 153                         {
 154                                 TimeZoneInfo.TransitionTime s1 = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,4,0,0), 3, 2, DayOfWeek.Sunday);
 155                                 TimeZoneInfo.TransitionTime e1 = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,4,0,0), 10, 2, DayOfWeek.Sunday);
 156                                 TimeZoneInfo.AdjustmentRule r1 = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule (new DateTime (2000,1,1), new DateTime (2005,1,1), new TimeSpan (1,0,0), s1, e1);
 157                                 TimeZoneInfo.TransitionTime s2 = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,4,0,0), 2, 2, DayOfWeek.Sunday);
 158                                 TimeZoneInfo.TransitionTime e2 = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,4,0,0), 11, 2, DayOfWeek.Sunday);
 159                                 TimeZoneInfo.AdjustmentRule r2 = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule (new DateTime (2004,1,1), new DateTime (2007,1,1), new TimeSpan (1,0,0), s2, e2);
 160                                 TimeZoneInfo.CreateCustomTimeZone ("mytimezone", new TimeSpan (6,0,0),null,null,null,new TimeZoneInfo.AdjustmentRule[] {r1, r2});
 161                         }
 162
 163                         [Test]
 164                         [ExpectedException (typeof (InvalidTimeZoneException))]
 165                         public void RulesNotOrdered ()
 166                         {
 167                                 TimeZoneInfo.TransitionTime s1 = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,4,0,0), 3, 2, DayOfWeek.Sunday);
 168                                 TimeZoneInfo.TransitionTime e1 = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,4,0,0), 10, 2, DayOfWeek.Sunday);
 169                                 TimeZoneInfo.AdjustmentRule r1 = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule (new DateTime (2000,1,1), new DateTime (2005,1,1), new TimeSpan (1,0,0), s1, e1);
 170                                 TimeZoneInfo.TransitionTime s2 = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,4,0,0), 2, 2, DayOfWeek.Sunday);
 171                                 TimeZoneInfo.TransitionTime e2 = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,4,0,0), 11, 2, DayOfWeek.Sunday);
 172                                 TimeZoneInfo.AdjustmentRule r2 = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule (new DateTime (2006,1,1), new DateTime (2007,1,1), new TimeSpan (1,0,0), s2, e2);
 173                                 TimeZoneInfo.CreateCustomTimeZone ("mytimezone", new TimeSpan (6,0,0),null,null,null,new TimeZoneInfo.AdjustmentRule[] {r2, r1});
 174                         }
 175
 176                         [Test]
 177                         [ExpectedException (typeof (InvalidTimeZoneException))]
 178                         public void OffsetOutOfRange ()
 179                         {
 180                                 TimeZoneInfo.TransitionTime startTransition = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,4,0,0), 3, 2, DayOfWeek.Sunday);
 181                                 TimeZoneInfo.TransitionTime endTransition = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,4,0,0), 10, 2, DayOfWeek.Sunday);
 182                                 TimeZoneInfo.AdjustmentRule rule = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule (new DateTime (2000,1,1), new DateTime (2005,1,1), new TimeSpan (3,0,0), startTransition, endTransition);
 183                                 TimeZoneInfo.CreateCustomTimeZone ("mytimezone", new TimeSpan (12,0,0),null,null,null,new TimeZoneInfo.AdjustmentRule[] {rule});
 184                         }
 185
 186                         [Test]
 187                         [ExpectedException (typeof (InvalidTimeZoneException))]
 188                         public void NullRule ()
 189                         {
 190                                 TimeZoneInfo.CreateCustomTimeZone ("mytimezone", new TimeSpan (12,0,0),null,null,null,new TimeZoneInfo.AdjustmentRule[] {null});
 191                         }
 192
 193                         [Test]
 194                         [ExpectedException (typeof (InvalidTimeZoneException))]
 195                         public void MultiplesRulesForDate ()
 196                         {
 197                                 TimeZoneInfo.TransitionTime s1 = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,4,0,0), 3, 2, DayOfWeek.Sunday);
 198                                 TimeZoneInfo.TransitionTime e1 = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,4,0,0), 10, 2, DayOfWeek.Sunday);
 199                                 TimeZoneInfo.AdjustmentRule r1 = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule (new DateTime (2000,1,1), new DateTime (2005,1,1), new TimeSpan (1,0,0), s1, e1);
 200                                 TimeZoneInfo.TransitionTime s2 = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,4,0,0), 2, 2, DayOfWeek.Sunday);
 201                                 TimeZoneInfo.TransitionTime e2 = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,4,0,0), 11, 2, DayOfWeek.Sunday);
 202                                 TimeZoneInfo.AdjustmentRule r2 = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule (new DateTime (2005,1,1), new DateTime (2007,1,1), new TimeSpan (1,0,0), s2, e2);
 203                                 TimeZoneInfo.CreateCustomTimeZone ("mytimezone", new TimeSpan (6,0,0),null,null,null,new TimeZoneInfo.AdjustmentRule[] {r1, r2});
 204                         }
 205
 206                         [Test]
 207                         public void SupportsDaylightSavingTime_NonEmptyAdjustmentRule ()
 208                         {
 209                                 TimeZoneInfo.TransitionTime s1 = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,4,0,0), 3, 2, DayOfWeek.Sunday);
 210                                 TimeZoneInfo.TransitionTime e1 = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,4,0,0), 10, 2, DayOfWeek.Sunday);
 211                                 TimeZoneInfo.AdjustmentRule r1 = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule (new DateTime (2000,1,1), new DateTime (2005,1,1), new TimeSpan (1,0,0), s1, e1);
 212                                 TimeZoneInfo tz = TimeZoneInfo.CreateCustomTimeZone ("mytimezone", new TimeSpan (6,0,0),null,null,null,new TimeZoneInfo.AdjustmentRule[] {r1});
 213                                 Assert.IsTrue (tz.SupportsDaylightSavingTime);
 214                         }
 215
 216                         [Test]
 217                         public void SupportsDaylightSavingTime_EmptyAdjustmentRule ()
 218                         {
 219                                 TimeZoneInfo tz = TimeZoneInfo.CreateCustomTimeZone ("mytimezone", new TimeSpan (6,0,0),null,null,null,null);
 220                                 Assert.IsFalse (tz.SupportsDaylightSavingTime);
 221                         }
 222
 223                         [Test]
 224                         public void SupportsDaylightSavingTime_NonEmptyAdjustmentRule_DisableDaylightSavingTime ()
 225                         {
 226                                 TimeZoneInfo.TransitionTime s1 = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,4,0,0), 3, 2, DayOfWeek.Sunday);
 227                                 TimeZoneInfo.TransitionTime e1 = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,4,0,0), 10, 2, DayOfWeek.Sunday);
 228                                 TimeZoneInfo.AdjustmentRule r1 = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule (new DateTime (2000,1,1), new DateTime (2005,1,1), new TimeSpan (1,0,0), s1, e1);
 229                                 TimeZoneInfo tz = TimeZoneInfo.CreateCustomTimeZone ("mytimezone", new TimeSpan (6,0,0),null,null,null,new TimeZoneInfo.AdjustmentRule[] {r1}, true);
 230                                 Assert.IsFalse (tz.SupportsDaylightSavingTime);
 231                         }
 232
 233                         [Test]
 234                         public void SupportsDaylightSavingTime_EmptyAdjustmentRule_DisableDaylightSavingTime ()
 235                         {
 236                                 TimeZoneInfo tz = TimeZoneInfo.CreateCustomTimeZone ("mytimezone", new TimeSpan (6,0,0),null,null,null,null,true);
 237                                 Assert.IsFalse (tz.SupportsDaylightSavingTime);
 238                         }
 239                 }
 240
 241                 [TestFixture]
 242                 public class IsDaylightSavingTimeTests
 243                 {
 244                         TimeZoneInfo london;
 245
 246                         [SetUp]
 247                         public void CreateTimeZones ()
 248                         {
 249                                 TimeZoneInfo.TransitionTime start = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,1,0,0), 3, 5, DayOfWeek.Sunday);
 250                                 TimeZoneInfo.TransitionTime end = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,2,0,0), 10, 5, DayOfWeek.Sunday);
 251                                 TimeZoneInfo.AdjustmentRule rule = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule (DateTime.MinValue.Date, DateTime.MaxValue.Date, new TimeSpan (1,0,0), start, end);
 252                                 london = TimeZoneInfo.CreateCustomTimeZone ("Europe/London", new TimeSpan (0), "Europe/London", "British Standard Time", "British Summer Time", new TimeZoneInfo.AdjustmentRule [] {rule});
 253                         }
 254
 255                         [Test]
 256                         public void NoDSTInUTC ()
 257                         {
 258                                 DateTime june01 = new DateTime (2007, 06, 01);
 259                                 Assert.IsFalse (TimeZoneInfo.Utc.IsDaylightSavingTime (june01));
 260                         }
 261
 262                         [Test]
 263                         public void DSTInLondon ()
 264                         {
 265                                 if (Environment.OSVersion.Platform != PlatformID.Unix)
 266                                         Assert.Ignore ("Not running on Unix.");
 267                                 DateTime june01 = new DateTime (2007, 06, 01);
 268                                 DateTime xmas = new DateTime (2007, 12, 25);
 269                                 Assert.IsTrue (london.IsDaylightSavingTime (june01), "June 01 is DST in London");
 270                                 Assert.IsFalse (london.IsDaylightSavingTime (xmas), "Xmas is not DST in London");
 271                         }
 272
 273                         [Test]
 274                         public void DSTTransisions ()
 275                         {
 276                                 if (Environment.OSVersion.Platform != PlatformID.Unix)
 277                                         Assert.Ignore ("Not running on Unix.");
 278                                 DateTime beforeDST = new DateTime (2007, 03, 25, 0, 59, 59, DateTimeKind.Unspecified);
 279                                 DateTime startDST = new DateTime (2007, 03, 25, 2, 0, 0, DateTimeKind.Unspecified);
 280                                 DateTime endDST = new DateTime (2007, 10, 28, 1, 59, 59, DateTimeKind.Unspecified);
 281                                 DateTime afterDST = new DateTime (2007, 10, 28, 2, 0, 0, DateTimeKind.Unspecified);
 282                                 Assert.IsFalse (london.IsDaylightSavingTime (beforeDST), "Just before DST");
 283                                 Assert.IsTrue (london.IsDaylightSavingTime (startDST), "the first seconds of DST");
 284                                 Assert.IsFalse (london.IsDaylightSavingTime (endDST), "The last seconds of DST");
 285                                 Assert.IsFalse (london.IsDaylightSavingTime (afterDST), "Just after DST");
 286                         }
 287
 288                         [Test]
 289                         public void DSTTransisionsUTC ()
 290                         {
 291                                 DateTime beforeDST = new DateTime (2007, 03, 25, 0, 59, 59, DateTimeKind.Utc);
 292                                 DateTime startDST = new DateTime (2007, 03, 25, 1, 0, 0, DateTimeKind.Utc);
 293                                 DateTime endDST = new DateTime (2007, 10, 28, 0, 59, 59, DateTimeKind.Utc);
 294                                 DateTime afterDST = new DateTime (2007, 10, 28, 1, 0, 0, DateTimeKind.Utc);
 295                                 Assert.IsFalse (london.IsDaylightSavingTime (beforeDST), "Just before DST");
 296                                 Assert.IsTrue (london.IsDaylightSavingTime (startDST), "the first seconds of DST");
 297                                 Assert.IsTrue (london.IsDaylightSavingTime (endDST), "The last seconds of DST");
 298                                 Assert.IsFalse (london.IsDaylightSavingTime (afterDST), "Just after DST");
 299                         }
 300
 301                 #if SLOW_TESTS
 302                         [Test]
 303                         public void MatchTimeZoneBehavior ()
 304                         {
 305                                 TimeZone tzone = TimeZone.CurrentTimeZone;
 306                                 TimeZoneInfo local = TimeZoneInfo.Local;
 307                                 for (DateTime date = new DateTime (2007, 01, 01, 0, 0, 0, DateTimeKind.Local); date < new DateTime (2007, 12, 31, 23, 59, 59); date += new TimeSpan (0,1,0)) {
 308                                         date = DateTime.SpecifyKind (date, DateTimeKind.Local);
 309                                         if (local.IsInvalidTime (date))
 310                                                 continue;
 311                                         Assert.IsTrue (tzone.IsDaylightSavingTime (date) == local.IsDaylightSavingTime (date));
 312                                 }
 313                         }
 314                 #endif
 315                         [Test (Description="Description xambug #17155")]
 316                         public void AdjustmentRuleAfterNewYears ()
 317                         {
 318                                 TimeZoneInfo tz;
 319                                 if (Environment.OSVersion.Platform == PlatformID.Unix)
 320                                         tz = TimeZoneInfo.FindSystemTimeZoneById ("Pacific/Auckland"); // *nix
 321                                 else
 322                                         tz = TimeZoneInfo.FindSystemTimeZoneById ("New Zealand Standard Time"); // Windows
 323
 324                                 // DST start: 9/29/2013 2:00:00 AM
 325                                 // DST end: 4/6/2014 3:00:00 AM
 326                                 DateTime dt = new DateTime (2014, 1, 9, 23, 0, 0, DateTimeKind.Utc);
 327                                 Assert.IsTrue (tz.IsDaylightSavingTime (dt), "#1.1");
 328
 329                                 // DST start: 9/29/2014 2:00:00 AM
 330                                 // DST end: 4/6/2015 3:00:00 AM
 331                                 dt = new DateTime (2014, 6, 9, 23, 0, 0, DateTimeKind.Utc);
 332                                 Assert.IsFalse (tz.IsDaylightSavingTime (dt), "#2.1");
 333
 334                                 // DST start: 9/29/2014 2:00:00 AM
 335                                 // DST end: 4/6/2015 3:00:00 AM
 336                                 dt = new DateTime (2014, 10, 9, 23, 0, 0, DateTimeKind.Utc);
 337                                 Assert.IsTrue (tz.IsDaylightSavingTime (dt), "#3.1");
 338                         }
 339
 340                         [Test] //Covers #26008
 341                         public void DSTWithFloatingDateRule ()
 342                         {
 343                                 // Construct a custom time zone where daylight saving time starts on the
 344                                 // 2nd Sunday in March.
 345                                 var transitionToDaylight = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1, 1, 1, 2, 0, 0), 3, 2, DayOfWeek.Sunday);
 346                                 var transitionToStandard = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1, 1, 1, 2, 0, 0), 11, 1, DayOfWeek.Sunday);
 347                                 var adjustment = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule (DateTime.MinValue.Date, DateTime.MaxValue.Date, new TimeSpan (1, 0, 0), transitionToDaylight, transitionToStandard);
 348                                 var timeZone = TimeZoneInfo.CreateCustomTimeZone ("BugCheck", new TimeSpan (-8, 0, 0), "Testing", "Testing Standard", "Testing Daylight", new TimeZoneInfo.AdjustmentRule [] { adjustment });
 349                                 // See if March 7, 2014 is listed as being during daylight saving time.
 350                                 // If it is DST, then the runtime has the bug that we are looking for.
 351                                 Assert.IsFalse (timeZone.IsDaylightSavingTime (new DateTime (2014, 3, 7, 12, 0, 0, DateTimeKind.Unspecified)));
 352                         }
 353
 354                         [Test] //Covers #25050
 355                         public void TestAthensDST ()
 356                         {
 357                                 TimeZoneInfo tzi = TimeZoneInfo.FindSystemTimeZoneById ("Europe/Athens");
 358                                 var date = new DateTime (2014, 3, 30 , 2, 0, 0);
 359                                 Assert.IsFalse (tzi.IsDaylightSavingTime (date));
 360                                 Assert.AreEqual (new TimeSpan (2,0,0), tzi.GetUtcOffset (date));
 361                         }
 362
 363                         [Test] //Covers #41349
 364                         public void TestIsDST_DateTimeOffset ()
 365                         {
 366                                 TimeZoneInfo tzi = TimeZoneInfo.FindSystemTimeZoneById ("Europe/Athens");
 367                                 var date = new DateTime (2014, 3, 30 , 2, 0, 0);
 368                                 var offset = tzi.GetUtcOffset (date);
 369                                 var dateOffset = new DateTimeOffset (date, offset);
 370                                 Assert.IsFalse (tzi.IsDaylightSavingTime (dateOffset));
 371
 372                                 date = new DateTime (2014, 3, 30 , 3, 0, 0);
 373                                 offset = tzi.GetUtcOffset (date);
 374                                 dateOffset = new DateTimeOffset (date, offset);
 375                                 Assert.IsTrue (tzi.IsDaylightSavingTime (dateOffset));
 376                         }
 377                 }
 378
 379                 [TestFixture]
 380                 public class ConvertTimeTests_LocalUtc : ConvertTimeTests
 381                 {
 382                         static TimeZoneInfo oldLocal;
 383
 384                         [SetUp]
 385                         public void SetLocal ()
 386                         {
 387                                 base.CreateTimeZones ();
 388
 389                                 oldLocal = TimeZoneInfo.Local;
 390                                 TimeZoneInfoTest.SetLocal (TimeZoneInfo.Utc);
 391                         }
 392
 393                         [TearDown]
 394                         public void RestoreLocal ()
 395                         {
 396                                 TimeZoneInfoTest.SetLocal (oldLocal);
 397                         }
 398                 }
 399
 400                 [TestFixture]
 401                 public class ConvertTimeTests
 402                 {
 403                         TimeZoneInfo london;
 404
 405                         [SetUp]
 406                         public void CreateTimeZones ()
 407                         {
 408                                 TimeZoneInfo.TransitionTime start = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,1,0,0), 3, 5, DayOfWeek.Sunday);
 409                                 TimeZoneInfo.TransitionTime end = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,2,0,0), 10, 5, DayOfWeek.Sunday);
 410                                 TimeZoneInfo.AdjustmentRule rule = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule (DateTime.MinValue.Date, DateTime.MaxValue.Date, new TimeSpan (1,0,0), start, end);
 411                                 london = TimeZoneInfo.CreateCustomTimeZone ("Europe/London", new TimeSpan (0), "Europe/London", "British Standard Time", "British Summer Time", new TimeZoneInfo.AdjustmentRule [] {rule});
 412                         }
 413
 414                         [Test]
 415                         [ExpectedException (typeof (ArgumentException))]
 416                         public void ConvertFromUtc_KindIsLocalException ()
 417                         {
 418                                 if (Environment.OSVersion.Platform != PlatformID.Unix)
 419                                         throw new ArgumentException ();
 420                                 TimeZoneInfo.ConvertTimeFromUtc (new DateTime (2007, 5, 3, 11, 8, 0, DateTimeKind.Local), TimeZoneInfo.Local);
 421                         }
 422
 423                         [Test]
 424                         [ExpectedException (typeof (ArgumentNullException))]
 425                         public void ConvertFromUtc_DestinationTimeZoneIsNullException ()
 426                         {
 427                                 TimeZoneInfo.ConvertTimeFromUtc (new DateTime (2007, 5, 3, 11, 8, 0), null);
 428                         }
 429
 430                         [Test]
 431                         public void ConvertFromUtc_DestinationIsUTC ()
 432                         {
 433                                 DateTime now = DateTime.UtcNow;
 434                                 DateTime converted = TimeZoneInfo.ConvertTimeFromUtc (now, TimeZoneInfo.Utc);
 435                                 Assert.AreEqual (now, converted);
 436                         }
 437
 438                         [Test]
 439                         public void ConvertFromUTC_ConvertInWinter ()
 440                         {
 441                                 if (Environment.OSVersion.Platform != PlatformID.Unix)
 442                                         Assert.Ignore ("Not running on Unix.");
 443                                 DateTime utc = new DateTime (2007, 12, 25, 12, 0, 0);
 444                                 DateTime converted = TimeZoneInfo.ConvertTimeFromUtc (utc, london);
 445                                 Assert.AreEqual (utc, converted);
 446                         }
 447
 448                         [Test]
 449                         public void ConvertFromUtc_ConvertInSummer ()
 450                         {
 451                                 if (Environment.OSVersion.Platform != PlatformID.Unix)
 452                                         Assert.Ignore ("Not running on Unix.");
 453                                 DateTime utc = new DateTime (2007, 06, 01, 12, 0, 0);
 454                                 DateTime converted = TimeZoneInfo.ConvertTimeFromUtc (utc, london);
 455                                 Assert.AreEqual (utc + new TimeSpan (1,0,0), converted);
 456                         }
 457
 458                         [Test]
 459                         public void ConvertToUTC_KindIsUtc ()
 460                         {
 461                                 DateTime now = DateTime.UtcNow;
 462                                 Assert.AreEqual (now.Kind, DateTimeKind.Utc);
 463                                 DateTime converted = TimeZoneInfo.ConvertTimeToUtc (now);
 464                                 Assert.AreEqual (now, converted);
 465                         }
 466
 467                         [Test]
 468                         [ExpectedException (typeof (ArgumentException))]
 469                         public void ConvertToUTC_KindIsUTCButSourceIsNot ()
 470                         {
 471                                 TimeZoneInfo.ConvertTimeToUtc (new DateTime (2007, 5, 3, 12, 8, 0, DateTimeKind.Utc), london);
 472                         }
 473
 474                         [Test]
 475                         [ExpectedException (typeof (ArgumentException))]
 476                         public void ConvertToUTC_KindIsLocalButSourceIsNot ()
 477                         {
 478                                 if (Environment.OSVersion.Platform != PlatformID.Unix)
 479                                         throw new ArgumentException ();
 480                                 TimeZoneInfo.ConvertTimeToUtc (new DateTime (2007, 5, 3, 12, 8, 0, DateTimeKind.Local), london);
 481                         }
 482
 483                         [Test]
 484                         [ExpectedException (typeof (ArgumentException))]
 485                         public void ConvertToUTC_InvalidDate ()
 486                         {
 487                                 TimeZoneInfo.ConvertTimeToUtc (new DateTime (2007, 3, 25, 1, 30, 0), london);
 488                         }
 489
 490                         [Test]
 491                         [ExpectedException (typeof (ArgumentNullException))]
 492                         public void ConvertToUTC_SourceIsNull ()
 493                         {
 494                                 TimeZoneInfo.ConvertTimeToUtc (new DateTime (2007, 5, 3, 12, 16, 0), null);
 495                         }
 496
 497                 #if SLOW_TESTS
 498                         [Test]
 499                         public void ConvertToUtc_MatchDateTimeBehavior ()
 500                         {
 501                                 for (DateTime date = new DateTime (2007, 01, 01, 0, 0, 0); date < new DateTime (2007, 12, 31, 23, 59, 59); date += new TimeSpan (0,1,0)) {
 502                                         Assert.AreEqual (TimeZoneInfo.ConvertTimeToUtc (date), date.ToUniversalTime ());
 503                                 }
 504                         }
 505                 #endif
 506
 507                         [Test]
 508                         public void ConvertFromToUtc ()
 509                         {
 510                                 if (Environment.OSVersion.Platform != PlatformID.Unix)
 511                                         Assert.Ignore ("Not running on Unix.");
 512                                 DateTime utc = DateTime.UtcNow;
 513                                 Assert.AreEqual (utc.Kind, DateTimeKind.Utc);
 514                                 DateTime converted = TimeZoneInfo.ConvertTimeFromUtc (utc, london);
 515                                 Assert.AreEqual (converted.Kind, DateTimeKind.Unspecified);
 516                                 DateTime back = TimeZoneInfo.ConvertTimeToUtc (converted, london);
 517                                 Assert.AreEqual (back.Kind, DateTimeKind.Utc);
 518                                 Assert.AreEqual (utc, back);
 519
 520                         }
 521
 522                         [Test]
 523                         public void ConvertTimeToUtc_Overflow ()
 524                         {
 525                                 var res = TimeZoneInfo.ConvertTimeToUtc (new DateTime (0));
 526                                 Assert.AreEqual (res.Kind, DateTimeKind.Utc, "#1");
 527
 528                                 res = TimeZoneInfo.ConvertTimeToUtc (DateTime.MaxValue);
 529                                 Assert.AreEqual (res.Kind, DateTimeKind.Utc, "#2");
 530                         }
 531
 532                         [Test]
 533                         public void ConvertFromToUtc_Utc ()
 534                         {
 535                                 DateTime utc = DateTime.UtcNow;
 536                                 Assert.AreEqual (utc.Kind, DateTimeKind.Utc);
 537                                 DateTime converted = TimeZoneInfo.ConvertTimeFromUtc (utc, TimeZoneInfo.Utc);
 538                                 Assert.AreEqual (DateTimeKind.Utc, converted.Kind);
 539                                 DateTime back = TimeZoneInfo.ConvertTimeToUtc (converted, TimeZoneInfo.Utc);
 540                                 Assert.AreEqual (back.Kind, DateTimeKind.Utc);
 541                                 Assert.AreEqual (utc, back);
 542                         }
 543
 544                         [Test]
 545                         public void ConvertFromToLocal ()
 546                         {
 547                                 DateTime utc = DateTime.UtcNow;
 548                                 Assert.AreEqual (utc.Kind, DateTimeKind.Utc);
 549                                 DateTime converted = TimeZoneInfo.ConvertTimeFromUtc (utc, TimeZoneInfo.Local);
 550                                 var expectedKind = (TimeZoneInfo.Local == TimeZoneInfo.Utc)? DateTimeKind.Utc : DateTimeKind.Local;
 551                                 Assert.AreEqual (expectedKind, converted.Kind);
 552                                 DateTime back = TimeZoneInfo.ConvertTimeToUtc (converted, TimeZoneInfo.Local);
 553                                 Assert.AreEqual (back.Kind, DateTimeKind.Utc);
 554                                 Assert.AreEqual (utc, back);
 555                         }
 556
 557                         [Test]
 558                         public void ConvertToTimeZone ()
 559                         {
 560                                 if (Environment.OSVersion.Platform != PlatformID.Unix)
 561                                         Assert.Ignore ("Not running on Unix.");
 562
 563                                 TimeZoneInfo.ConvertTime (DateTime.Now, TimeZoneInfo.FindSystemTimeZoneById("Pacific/Auckland"));
 564                         }
 565
 566                         [Test]
 567                         [ExpectedException (typeof (ArgumentNullException))]
 568                         public void ConvertTime_DateTime_TimeZoneInfo_DestinationTimeZoneIsNull ()
 569                         {
 570                                 TimeZoneInfo.ConvertTime (DateTime.Now, null);
 571                         }
 572
 573                         [Test]
 574                         public void ConvertTime_DateTime_TimeZoneInfo_DateTimeKindMatch ()
 575                         {
 576                                 var sdt = new DateTime (2014, 1, 9, 23, 0, 0, DateTimeKind.Utc);
 577                                 var ddt = TimeZoneInfo.ConvertTime (sdt, TimeZoneInfo.Utc);
 578                                 Assert.AreEqual (ddt.Kind, sdt.Kind, "#1.1");
 579                                 Assert.AreEqual (ddt.Kind, DateTimeKind.Utc, "#1.2");
 580
 581                                 sdt = new DateTime (2014, 1, 9, 23, 0, 0, DateTimeKind.Local);
 582                                 ddt = TimeZoneInfo.ConvertTime (sdt, TimeZoneInfo.Local);
 583                                 Assert.AreEqual (ddt.Kind, sdt.Kind, "#2.1");
 584                                 Assert.AreEqual (ddt.Kind, DateTimeKind.Local, "#2.2");
 585
 586                                 sdt = new DateTime (2014, 1, 9, 23, 0, 0);
 587                                 ddt = TimeZoneInfo.ConvertTime (sdt, TimeZoneInfo.Local);
 588                                 var expectedKind = (TimeZoneInfo.Local == TimeZoneInfo.Utc)? DateTimeKind.Utc : sdt.Kind;
 589                                 Assert.AreEqual (expectedKind,  ddt.Kind, "#3.1");
 590                                 Assert.AreEqual (DateTimeKind.Unspecified, sdt.Kind, "#3.2");
 591                         }
 592
 593                         [Test]
 594                         [ExpectedException (typeof (ArgumentNullException))]
 595                         public void ConverTime_DateTime_TimeZoneInfo_TimeZoneInfo_SourceTimeZoneIsNull ()
 596                         {
 597                                 TimeZoneInfo.ConvertTime (DateTime.Now, null, TimeZoneInfo.Local);
 598                         }
 599
 600                         [Test]
 601                         [ExpectedException (typeof (ArgumentNullException))]
 602                         public void ConverTime_DateTime_TimeZoneInfo_TimeZoneInfo_DestinationTimeZoneIsNull ()
 603                         {
 604                                 TimeZoneInfo.ConvertTime (DateTime.Now, TimeZoneInfo.Utc, null);
 605                         }
 606
 607                         [Test (Description="Fix for xambug https://bugzilla.xamarin.com/show_bug.cgi?id=17155")]
 608                         public void ConvertTime_AdjustmentRuleAfterNewYears ()
 609                         {
 610                                 TimeZoneInfo tz;
 611                                 if (Environment.OSVersion.Platform == PlatformID.Unix)
 612                                         tz = TimeZoneInfo.FindSystemTimeZoneById ("Pacific/Auckland"); // *nix
 613                                 else
 614                                         tz = TimeZoneInfo.FindSystemTimeZoneById ("New Zealand Standard Time"); // Windows
 615
 616                                 // DST start: 9/29/2013 2:00:00 AM
 617                                 // DST end: 4/6/2014 3:00:00 AM
 618                                 DateTime sdt = new DateTime (2014, 1, 9, 23, 0, 0, DateTimeKind.Utc);
 619                                 DateTime ddt = TimeZoneInfo.ConvertTime (sdt, tz);
 620                                 Assert.AreEqual (10, ddt.Day, "#1.1");
 621                                 Assert.AreEqual (1, ddt.Month, "#1.2");
 622                                 Assert.AreEqual (2014, ddt.Year, "#1.3");
 623                                 Assert.AreEqual (12, ddt.Hour, "#1.4");
 624                                 Assert.AreEqual (0, ddt.Minute, "#1.5");
 625                                 Assert.AreEqual (0, ddt.Second, "#1.6");
 626
 627                                 // DST start: 9/29/2014 2:00:00 AM
 628                                 // DST end: 4/6/2015 3:00:00 AM
 629                                 sdt = new DateTime (2014, 6, 9, 23, 0, 0, DateTimeKind.Utc);
 630                                 ddt = TimeZoneInfo.ConvertTime (sdt, tz);
 631                                 Assert.AreEqual (10, ddt.Day, "#2.1");
 632                                 Assert.AreEqual (6, ddt.Month, "#2.2");
 633                                 Assert.AreEqual (2014, ddt.Year, "#2.3");
 634                                 Assert.AreEqual (11, ddt.Hour, "#2.4");
 635                                 Assert.AreEqual (0, ddt.Minute, "#2.5");
 636                                 Assert.AreEqual (0, ddt.Second, "#2.6");
 637
 638                                 // DST start: 9/29/2014 2:00:00 AM
 639                                 // DST end: 4/6/2015 3:00:00 AM
 640                                 sdt = new DateTime (2014, 10, 9, 23, 0, 0, DateTimeKind.Utc);
 641                                 ddt = TimeZoneInfo.ConvertTime (sdt, tz);
 642                                 Assert.AreEqual (10, ddt.Day, "#3.1");
 643                                 Assert.AreEqual (10, ddt.Month, "#3.2");
 644                                 Assert.AreEqual (2014, ddt.Year, "#3.3");
 645                                 Assert.AreEqual (12, ddt.Hour, "#3.4");
 646                                 Assert.AreEqual (0, ddt.Minute, "#3.5");
 647                                 Assert.AreEqual (0, ddt.Second, "#3.6");
 648                         }
 649
 650                         [Test (Description="Fix the bug https://bugzilla.xamarin.com/show_bug.cgi?id=1849")]
 651                         public void ConvertTime_AjustmentConvertTimeWithSourceTimeZone () {
 652
 653                                 TimeZoneInfo easternTimeZone;
 654                                 TimeZoneInfo pacificTimeZone;
 655
 656                                 if (Environment.OSVersion.Platform == PlatformID.Unix) {
 657                                         // *nix
 658                                         easternTimeZone = TimeZoneInfo.FindSystemTimeZoneById ("US/Eastern");
 659                                         pacificTimeZone = TimeZoneInfo.FindSystemTimeZoneById ("US/Pacific");
 660                                 }
 661                                 else {
 662                                         // Windows
 663                                         easternTimeZone = TimeZoneInfo.FindSystemTimeZoneById ("Eastern Standard Time");
 664                                         pacificTimeZone = TimeZoneInfo.FindSystemTimeZoneById ("Pacific Standard Time");
 665                                 }
 666
 667                                 DateTime lastMidnight = new DateTime (new DateTime (2012, 06, 13).Ticks, DateTimeKind.Unspecified);
 668                                 DateTime lastMidnightAsEST = TimeZoneInfo.ConvertTime (lastMidnight, pacificTimeZone, easternTimeZone);
 669                                 DateTime lastMidnightAsPST = TimeZoneInfo.ConvertTime (lastMidnightAsEST, easternTimeZone, pacificTimeZone);
 670
 671                                 // Last midnight in PST as EST should be 3AM
 672                                 DateTime expectedDate = new DateTime (2012, 06, 13, 3, 0, 0);
 673
 674                                 Assert.AreEqual (expectedDate, lastMidnightAsEST);
 675                                 Assert.AreEqual (lastMidnight, lastMidnightAsPST);
 676                         }
 677
 678                         [Test]
 679                         public void ConvertTimeBySystemTimeZoneId_UtcId ()
 680                         {
 681                                 DateTime localTime = TimeZoneInfo.ConvertTime (DateTime.UtcNow, TimeZoneInfo.Utc, TimeZoneInfo.Local);
 682
 683                                 TimeZoneInfo.ConvertTimeBySystemTimeZoneId (DateTime.UtcNow, TimeZoneInfo.Utc.Id, TimeZoneInfo.Local.Id);
 684                         }
 685                 }
 686
 687                 [TestFixture]
 688                 public class IsInvalidTimeTests
 689                 {
 690                         TimeZoneInfo london;
 691
 692                         [SetUp]
 693                         public void CreateTimeZones ()
 694                         {
 695                                 TimeZoneInfo.TransitionTime start = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,1,0,0), 3, 5, DayOfWeek.Sunday);
 696                                 TimeZoneInfo.TransitionTime end = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,2,0,0), 10, 5, DayOfWeek.Sunday);
 697                                 TimeZoneInfo.AdjustmentRule rule = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule (DateTime.MinValue.Date, DateTime.MaxValue.Date, new TimeSpan (1,0,0), start, end);
 698                                 london = TimeZoneInfo.CreateCustomTimeZone ("Europe/London", new TimeSpan (0), "Europe/London", "British Standard Time", "British Summer Time", new TimeZoneInfo.AdjustmentRule [] {rule});
 699                         }
 700
 701                 #if SLOW_TESTS
 702                         [Test]
 703                         public void UTCDate ()
 704                         {
 705                                 for (DateTime date = new DateTime (2007, 01, 01, 0, 0, 0); date < new DateTime (2007, 12, 31, 23, 59, 59); date += new TimeSpan (0,1,0)) {
 706                                         date = DateTime.SpecifyKind (date, DateTimeKind.Utc);
 707                                         Assert.IsFalse (london.IsInvalidTime (date));
 708                                 }
 709                         }
 710                 #endif
 711                         [Test]
 712                         public void InvalidDates ()
 713                         {
 714                                 Assert.IsFalse (london.IsInvalidTime (new DateTime (2007, 03, 25, 0, 59, 59)));
 715                                 Assert.IsTrue (london.IsInvalidTime (new DateTime (2007, 03, 25, 1, 0, 0)));
 716                                 Assert.IsTrue (london.IsInvalidTime (new DateTime (2007, 03, 25, 1, 59, 59)));
 717                                 Assert.IsFalse (london.IsInvalidTime (new DateTime (2007, 03, 25, 2, 0, 0)));
 718                         }
 719                 }
 720
 721                 [TestFixture]
 722                 public class IsAmbiguousTimeTests
 723                 {
 724                         TimeZoneInfo london;
 725
 726                         [SetUp]
 727                         public void CreateTimeZones ()
 728                         {
 729                                 TimeZoneInfo.TransitionTime start = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,1,0,0), 3, 5, DayOfWeek.Sunday);
 730                                 TimeZoneInfo.TransitionTime end = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,2,0,0), 10, 5, DayOfWeek.Sunday);
 731                                 TimeZoneInfo.AdjustmentRule rule = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule (DateTime.MinValue.Date, DateTime.MaxValue.Date, new TimeSpan (1,0,0), start, end);
 732                                 london = TimeZoneInfo.CreateCustomTimeZone ("Europe/London", new TimeSpan (0), "Europe/London", "British Standard Time", "British Summer Time", new TimeZoneInfo.AdjustmentRule [] {rule});
 733                         }
 734
 735                         [Test]
 736                         public void AmbiguousDates ()
 737                         {
 738                                 if (Environment.OSVersion.Platform != PlatformID.Unix)
 739                                         Assert.Ignore ("Not running on Unix.");
 740                                 Assert.IsFalse (london.IsAmbiguousTime (new DateTime (2007, 10, 28, 1, 0, 0)));
 741                                 Assert.IsTrue (london.IsAmbiguousTime (new DateTime (2007, 10, 28, 1, 0, 1)));
 742                                 Assert.IsTrue (london.IsAmbiguousTime (new DateTime (2007, 10, 28, 2, 0, 0)));
 743                                 Assert.IsFalse (london.IsAmbiguousTime (new DateTime (2007, 10, 28, 2, 0, 1)));
 744                         }
 745
 746                         [Test]
 747                         public void AmbiguousUTCDates ()
 748                         {
 749                                 if (Environment.OSVersion.Platform != PlatformID.Unix)
 750                                         Assert.Ignore ("Not running on Unix.");
 751                                 Assert.IsFalse (london.IsAmbiguousTime (new DateTime (2007, 10, 28, 0, 0, 0, DateTimeKind.Utc)));
 752                                 Assert.IsTrue (london.IsAmbiguousTime (new DateTime (2007, 10, 28, 0, 0, 1, DateTimeKind.Utc)));
 753                                 Assert.IsTrue (london.IsAmbiguousTime (new DateTime (2007, 10, 28, 0, 59, 59, DateTimeKind.Utc)));
 754                                 Assert.IsFalse (london.IsAmbiguousTime (new DateTime (2007, 10, 28, 1, 0, 0, DateTimeKind.Utc)));
 755                         }
 756
 757                 #if SLOW_TESTS
 758                         [Test]
 759                         public void AmbiguousInUTC ()
 760                         {
 761                                 for (DateTime date = new DateTime (2007, 01, 01, 0, 0, 0); date < new DateTime (2007, 12, 31, 23, 59, 59); date += new TimeSpan (0,1,0)) {
 762                                         Assert.IsFalse (TimeZoneInfo.Utc.IsAmbiguousTime (date));
 763                                 }
 764                         }
 765                 #endif
 766                 }
 767
 768                 [TestFixture]
 769                 public class GetSystemTimeZonesTests
 770                 {
 771                         [Test]
 772                         public void Identity ()
 773                         {
 774                                 Assert.AreSame (TimeZoneInfo.GetSystemTimeZones (), TimeZoneInfo.GetSystemTimeZones ());
 775                         }
 776
 777                         [Test]
 778                         public void NotEmpty ()
 779                         {
 780                                 if (Environment.OSVersion.Platform != PlatformID.Unix)
 781                                         Assert.Ignore ("Not running on Unix.");
 782                                 global::System.Collections.ObjectModel.ReadOnlyCollection<TimeZoneInfo> systemTZ = TimeZoneInfo.GetSystemTimeZones ();
 783                                 Assert.IsNotNull(systemTZ, "SystemTZ is null");
 784                                 Assert.IsFalse (systemTZ.Count == 0, "SystemTZ is empty");
 785                         }
 786
 787                         [Test]
 788                         public void ContainsBrussels ()
 789                         {
 790                                 if (Environment.OSVersion.Platform != PlatformID.Unix)
 791                                         Assert.Ignore ("Not running on Unix.");
 792                                 global::System.Collections.ObjectModel.ReadOnlyCollection<TimeZoneInfo> systemTZ = TimeZoneInfo.GetSystemTimeZones ();
 793                                 foreach (TimeZoneInfo tz in systemTZ) {
 794                                         if (tz.Id == "Europe/Brussels")
 795                                                 return;
 796                                 }
 797                                 Assert.Fail ("Europe/Brussels not found in SystemTZ");
 798                         }
 799
 800                         [Test]
 801                         public void ReflectionReturnsTheCorrectMethod ()
 802                         {
 803                                 var method = (MethodInfo) typeof (TimeZoneInfo).GetMember ("GetSystemTimeZones", MemberTypes.Method, BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic)[0];
 804
 805                                 var timeZones = (global::System.Collections.ObjectModel.ReadOnlyCollection<TimeZoneInfo>) method.Invoke (null, null);
 806                                 Assert.IsTrue (timeZones.Count > 0, "GetSystemTimeZones should not return an empty collection.");
 807                         }
 808
 809 #if !MOBILE
 810                         [Test]
 811                         public void WindowsRegistryTimezoneWithParentheses ()
 812                         {
 813                                 var method = (MethodInfo) typeof (TimeZoneInfo).GetMember ("TrimSpecial", MemberTypes.Method, BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic)[0];
 814
 815                                 var name = method.Invoke (null, new object [] { " <--->  Central Standard Time (Mexico)   ||<<>>" });
 816                                 Assert.AreEqual (name, "Central Standard Time (Mexico)", "#1");
 817                         }
 818 #endif
 819                 }
 820
 821                 [TestFixture]
 822                 public class FindSystemTimeZoneByIdTests
 823                 {
 824                         [Test]
 825                         [ExpectedException (typeof (ArgumentNullException))]
 826                         public void NullId ()
 827                         {
 828                                 TimeZoneInfo.FindSystemTimeZoneById (null);
 829                         }
 830
 831                         [Test]
 832                         [ExpectedException (typeof (TimeZoneNotFoundException))]
 833                         public void NonSystemTimezone ()
 834                         {
 835                                 if (Environment.OSVersion.Platform != PlatformID.Unix)
 836                                         throw new TimeZoneNotFoundException ();
 837                                 TimeZoneInfo.FindSystemTimeZoneById ("Neverland/The_Lagoon");
 838                         }
 839
 840                         [Test]
 841                         public void FindBrusselsTZ ()
 842                         {
 843                                 if (Environment.OSVersion.Platform != PlatformID.Unix)
 844                                         Assert.Ignore ("Not running on Unix.");
 845                                 TimeZoneInfo brussels = TimeZoneInfo.FindSystemTimeZoneById ("Europe/Brussels");
 846                                 Assert.IsNotNull (brussels);
 847                         }
 848
 849                         [Test]
 850                         public void OffsetIsCorrectInKinshasa ()
 851                         {
 852                                 if (Environment.OSVersion.Platform != PlatformID.Unix)
 853                                         Assert.Ignore ("Not running on Unix.");
 854                                 TimeZoneInfo kin = TimeZoneInfo.FindSystemTimeZoneById ("Africa/Kinshasa");
 855                                 Assert.AreEqual (new TimeSpan (1,0,0), kin.BaseUtcOffset, "BaseUtcOffset in Kinshasa is not +1h");
 856                         }
 857
 858                         [Test]
 859                         public void OffsetIsCorrectInBrussels ()
 860                         {
 861                                 if (Environment.OSVersion.Platform != PlatformID.Unix)
 862                                         Assert.Ignore ("Not running on Unix.");
 863                                 TimeZoneInfo brussels = TimeZoneInfo.FindSystemTimeZoneById ("Europe/Brussels");
 864                                 Assert.AreEqual (new TimeSpan (1,0,0), brussels.BaseUtcOffset, "BaseUtcOffset for Brussels is not +1h");
 865                         }
 866
 867                         [Test]
 868                         public void NoDSTInKinshasa ()
 869                         {
 870                                 if (Environment.OSVersion.Platform != PlatformID.Unix)
 871                                         Assert.Ignore ("Not running on Unix.");
 872                                 TimeZoneInfo kin = TimeZoneInfo.FindSystemTimeZoneById ("Africa/Kinshasa");
 873                                 Assert.IsFalse (kin.SupportsDaylightSavingTime);
 874                         }
 875
 876                         [Test]
 877                         public void BrusselsSupportsDST ()
 878                         {
 879                                 if (Environment.OSVersion.Platform != PlatformID.Unix)
 880                                         Assert.Ignore ("Not running on Unix.");
 881                                 TimeZoneInfo brussels = TimeZoneInfo.FindSystemTimeZoneById ("Europe/Brussels");
 882                                 Assert.IsTrue (brussels.SupportsDaylightSavingTime);
 883                         }
 884
 885                         [Test]
 886                         public void MelbourneSupportsDST ()
 887                         {
 888                                 if (Environment.OSVersion.Platform != PlatformID.Unix)
 889                                         Assert.Ignore ("Not running on Unix.");
 890                                 TimeZoneInfo melbourne = TimeZoneInfo.FindSystemTimeZoneById ("Australia/Melbourne");
 891                                 Assert.IsTrue (melbourne.SupportsDaylightSavingTime);
 892                         }
 893
 894                         [Test]
 895                         public void RomeAndVaticanSharesTime ()
 896                         {
 897                                 if (Environment.OSVersion.Platform != PlatformID.Unix)
 898                                         Assert.Ignore ("Not running on Unix.");
 899                                 TimeZoneInfo rome = TimeZoneInfo.FindSystemTimeZoneById ("Europe/Rome");
 900                                 TimeZoneInfo vatican = TimeZoneInfo.FindSystemTimeZoneById ("Europe/Vatican");
 901                                 Assert.IsTrue (rome.HasSameRules (vatican));
 902                         }
 903
 904                         [Test]
 905                         public void FindSystemTimeZoneById_Local_Roundtrip ()
 906                         {
 907                                 Assert.AreEqual (TimeZoneInfo.Local.Id, TimeZoneInfo.FindSystemTimeZoneById (TimeZoneInfo.Local.Id).Id);
 908                         }
 909
 910                         [Test]
 911                         public void Test326 ()
 912                         {
 913                                 DateTime utc = DateTime.UtcNow;
 914                                 DateTime local = TimeZoneInfo.ConvertTime (utc, TimeZoneInfo.Utc, TimeZoneInfo.FindSystemTimeZoneById (TimeZoneInfo.Local.Id));
 915                                 Assert.AreEqual (local, utc + TimeZoneInfo.Local.GetUtcOffset (utc), "ConvertTime/Local");
 916                         }
 917
 918                 #if SLOW_TESTS
 919                         [Test]
 920                         public void BrusselsAdjustments ()
 921                         {
 922                                 TimeZoneInfo.TransitionTime start = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,2,0,0), 3, 5, DayOfWeek.Sunday);
 923                                 TimeZoneInfo.TransitionTime end = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,3,0,0), 10, 5, DayOfWeek.Sunday);
 924                                 TimeZoneInfo.AdjustmentRule rule = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule (DateTime.MinValue.Date, DateTime.MaxValue.Date, new TimeSpan (1,0,0), start, end);
 925                                 TimeZoneInfo brussels = TimeZoneInfo.CreateCustomTimeZone ("Europe/Brussels", new TimeSpan (1, 0, 0), "Europe/Brussels", "", "", new TimeZoneInfo.AdjustmentRule [] {rule});
 926
 927                                 TimeZoneInfo brussels_sys = TimeZoneInfo.FindSystemTimeZoneById ("Europe/Brussels");
 928
 929                                 for (DateTime date = new DateTime (2006, 01, 01, 0, 0, 0, DateTimeKind.Local); date < new DateTime (2007, 12, 31, 23, 59, 59); date += new TimeSpan (0,30,0)) {
 930                                         Assert.AreEqual (brussels.GetUtcOffset (date), brussels_sys.GetUtcOffset (date));
 931                                         Assert.AreEqual (brussels.IsDaylightSavingTime (date), brussels_sys.IsDaylightSavingTime (date));
 932                                 }
 933                         }
 934                 #endif
 935
 936                         [Test]
 937                         public void SubminuteDSTOffsets ()
 938                         {
 939                                 if (Environment.OSVersion.Platform != PlatformID.Unix)
 940                                         Assert.Ignore ();
 941
 942                                 var subMinuteDSTs = new string [] {
 943                                         "Europe/Dublin", // Europe/Dublin has a DST offset of 34 minutes and 39 seconds in 1916.
 944                                         "Europe/Amsterdam",
 945                                         "America/St_Johns",
 946                                         "Canada/Newfoundland",
 947                                         "Europe/Moscow",
 948                                         "Europe/Riga",
 949                                 };
 950                                 foreach (var tz in subMinuteDSTs) {
 951                                         TimeZoneInfo.FindSystemTimeZoneById (tz);
 952                                 }
 953                         }
 954
 955                         [Test]
 956                         [ExpectedException (typeof (TimeZoneNotFoundException))]
 957                         public void InvalidName ()
 958                         {
 959                                 TimeZoneInfo.FindSystemTimeZoneById ("N/A");
 960                         }
 961                 }
 962
 963                 [TestFixture]
 964                 public class GetAmbiguousTimeOffsetsTests
 965                 {
 966                         [Test]
 967                         [ExpectedException (typeof(ArgumentException))]
 968                         public void DateIsNotAmbiguous ()
 969                         {
 970                                 if (Environment.OSVersion.Platform != PlatformID.Unix)
 971                                         throw new ArgumentException ();
 972                                 TimeZoneInfo brussels = TimeZoneInfo.FindSystemTimeZoneById ("Europe/Brussels");
 973                                 DateTime date = new DateTime (2007, 05, 11, 11, 40, 00);
 974                                 brussels.GetAmbiguousTimeOffsets (date);
 975                         }
 976
 977                         [Test]
 978                         public void AmbiguousOffsets ()
 979                         {
 980                                 if (Environment.OSVersion.Platform != PlatformID.Unix)
 981                                         Assert.Ignore ("Not running on Unix.");
 982                                 TimeZoneInfo brussels = TimeZoneInfo.FindSystemTimeZoneById ("Europe/Brussels");
 983                                 DateTime date = new DateTime (2007, 10, 28, 2, 30, 00);
 984                                 Assert.IsTrue (brussels.IsAmbiguousTime (date));
 985                                 Assert.AreEqual (2, brussels.GetAmbiguousTimeOffsets (date).Length);
 986                                 Assert.AreEqual (new TimeSpan[] {new TimeSpan (1, 0, 0), new TimeSpan (2, 0, 0)}, brussels.GetAmbiguousTimeOffsets (date));
 987                         }
 988                 }
 989
 990                 [TestFixture]
 991                 public class HasSameRulesTests
 992                 {
 993                         [Test]
 994                         public void NullAdjustments () //bnc #391011
 995                         {
 996                                 TimeZoneInfo utc = TimeZoneInfo.Utc;
 997                                 TimeZoneInfo custom = TimeZoneInfo.CreateCustomTimeZone ("Custom", new TimeSpan (0), "Custom", "Custom");
 998                                 Assert.IsTrue (utc.HasSameRules (custom));
 999                         }
1000                 }
1001
1002                 [TestFixture]
1003                 public class SerializationTests
1004                 {
1005                         [Test]
1006                         public void Serialization_Deserialization ()
1007                         {
1008                                 TimeZoneInfo.TransitionTime start = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,1,0,0), 3, 5, DayOfWeek.Sunday);
1009                                 TimeZoneInfo.TransitionTime end = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,2,0,0), 10, 5, DayOfWeek.Sunday);
1010                                 TimeZoneInfo.AdjustmentRule rule = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule (DateTime.MinValue.Date, DateTime.MaxValue.Date, new TimeSpan (1,0,0), start, end);
1011                                 TimeZoneInfo london = TimeZoneInfo.CreateCustomTimeZone ("Europe/London", new TimeSpan (0), "Europe/London", "British Standard Time", "British Summer Time", new TimeZoneInfo.AdjustmentRule [] {rule});
1012                                 MemoryStream stream = new MemoryStream ();
1013                                 BinaryFormatter formatter = new BinaryFormatter ();
1014                                 formatter.Serialize (stream, london);
1015                                 stream.Position = 0;
1016                                 TimeZoneInfo deserialized = (TimeZoneInfo) formatter.Deserialize (stream);
1017                                 stream.Close ();
1018                                 stream.Dispose ();
1019                                 Assert.IsTrue (london.Equals (deserialized));
1020                         }
1021                 }
1022
1023                 [TestFixture]
1024                 public class MultipleDaylightSavingTimeTests {
1025                         private TimeZoneInfo cairo;
1026                         private DateTime dst1Start;
1027                         private DateTime dst1End;
1028                         private DateTime dst2Start;
1029                         private DateTime dst2End;
1030
1031                         private TimeSpan baseUtcOffset;
1032                         private TimeSpan dstUtcOffset;
1033                         private TimeSpan dstOffset;
1034
1035                         [SetUp]
1036                         public void CreateTimeZones ()
1037                         {
1038                                 /*
1039                                 From 1/1/2014 12:00:00 AM to 6/30/2014 12:00:00 AM
1040                                         Delta: 01:00:00
1041                                         Begins at 12:00 AM on 16 May
1042                                         Ends at 1:00 AM on 29 June
1043                                 From 7/1/2014 12:00:00 AM to 12/31/2014 12:00:00 AM
1044                                         Delta: 01:00:00
1045                                         Begins at 12:00 AM on 29 July
1046                                         Ends at 12:00 AM on 26 September
1047                                 */
1048                                 dst1Start = new DateTime (2014, 5, 16);
1049                                 dst1End = new DateTime (2014, 6, 29);
1050                                 dst2Start = new DateTime (2014, 7, 29);
1051                                 dst2End = new DateTime (2014, 9, 26);
1052
1053                                 baseUtcOffset = new TimeSpan (2, 0, 0);
1054                                 dstUtcOffset = new TimeSpan (3, 0, 0);
1055                                 dstOffset = dstUtcOffset - baseUtcOffset;
1056
1057                                 var rule1 = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule (
1058                                         new DateTime (2014, 1, 1), new DateTime (2014, 6, 30), dstOffset,
1059                                         CreateFixedDateRule (dst1Start), CreateFixedDateRule (dst1End));
1060
1061                                 var rule2 = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule (
1062                                         new DateTime (2014, 7, 1), new DateTime (2014, 12, 31), dstOffset,
1063                                         CreateFixedDateRule (dst2Start), CreateFixedDateRule (dst2End));
1064
1065                                 cairo = TimeZoneInfo.CreateCustomTimeZone ("Africa/Cairo", baseUtcOffset, "Africa/Cairo", "EET", "EEST",
1066                                         new [] {rule1, rule2});
1067                         }
1068
1069                         private static TimeZoneInfo.TransitionTime CreateFixedDateRule (DateTime dateTime)
1070                         {
1071                                 var time = new DateTime (dateTime.Ticks - dateTime.Date.Ticks);
1072                                 return TimeZoneInfo.TransitionTime.CreateFixedDateRule (time, dateTime.Month, dateTime.Day);
1073                         }
1074
1075                         [Test]
1076                         public void GetUtcOffset_FromUTC ()
1077                         {
1078                                 var d = dst1Start.Add (-baseUtcOffset);
1079                                 d = DateTime.SpecifyKind (d, DateTimeKind.Utc);
1080                                 Assert.AreEqual(baseUtcOffset, cairo.GetUtcOffset (d.Add (new TimeSpan(0,0,0,-1))));
1081                                 Assert.AreEqual(dstUtcOffset, cairo.GetUtcOffset (d));
1082                                 Assert.AreEqual(dstUtcOffset, cairo.GetUtcOffset (d.Add (new TimeSpan(0,0,0, 1))));
1083
1084                                 d = dst1End.Add (-baseUtcOffset-dstOffset);
1085                                 d = DateTime.SpecifyKind (d, DateTimeKind.Utc);
1086                                 Assert.AreEqual(dstUtcOffset, cairo.GetUtcOffset (d.Add (new TimeSpan(0,0,0,-1))));
1087                                 Assert.AreEqual(baseUtcOffset, cairo.GetUtcOffset (d));
1088                                 Assert.AreEqual(baseUtcOffset, cairo.GetUtcOffset (d.Add (new TimeSpan(0,0,0, 1))));
1089
1090                                 d = dst2Start.Add (-baseUtcOffset);
1091                                 d = DateTime.SpecifyKind (d, DateTimeKind.Utc);
1092                                 Assert.AreEqual(baseUtcOffset, cairo.GetUtcOffset (d.Add (new TimeSpan(0,0,0,-1))));
1093                                 Assert.AreEqual(dstUtcOffset, cairo.GetUtcOffset (d));
1094                                 Assert.AreEqual(dstUtcOffset, cairo.GetUtcOffset (d.Add (new TimeSpan(0,0,0, 1))));
1095
1096                                 d = dst2End.Add (-baseUtcOffset-dstOffset);
1097                                 d = DateTime.SpecifyKind (d, DateTimeKind.Utc);
1098                                 Assert.AreEqual(dstUtcOffset, cairo.GetUtcOffset (d.Add (new TimeSpan(0,0,0,-1))));
1099                                 Assert.AreEqual(baseUtcOffset, cairo.GetUtcOffset (d));
1100                                 Assert.AreEqual(baseUtcOffset, cairo.GetUtcOffset (d.Add (new TimeSpan(0,0,0, 1))));
1101                         }
1102
1103                         [Test]
1104                         public void GetUtcOffset_FromLocal ()
1105                         {
1106                                 var d = dst1Start.Add (-baseUtcOffset);
1107                                 d = DateTime.SpecifyKind (d, DateTimeKind.Utc);
1108                                 d = d.ToLocalTime ();
1109                                 Assert.AreEqual(baseUtcOffset, cairo.GetUtcOffset (d.Add (new TimeSpan(0,0,0,-1))));
1110                                 Assert.AreEqual(dstUtcOffset, cairo.GetUtcOffset (d));
1111                                 Assert.AreEqual(dstUtcOffset, cairo.GetUtcOffset (d.Add (new TimeSpan(0,0,0, 1))));
1112
1113                                 d = dst1End.Add (-baseUtcOffset-dstOffset);
1114                                 d = DateTime.SpecifyKind (d, DateTimeKind.Utc);
1115                                 d = d.ToLocalTime ();
1116                                 Assert.AreEqual(dstUtcOffset, cairo.GetUtcOffset (d.Add (new TimeSpan(0,0,0,-1))));
1117                                 Assert.AreEqual(baseUtcOffset, cairo.GetUtcOffset (d));
1118                                 Assert.AreEqual(baseUtcOffset, cairo.GetUtcOffset (d.Add (new TimeSpan(0,0,0, 1))));
1119
1120                                 d = dst2Start.Add (-baseUtcOffset);
1121                                 d = DateTime.SpecifyKind (d, DateTimeKind.Utc);
1122                                 d = d.ToLocalTime ();
1123                                 Assert.AreEqual(baseUtcOffset, cairo.GetUtcOffset (d.Add (new TimeSpan(0,0,0,-1))));
1124                                 Assert.AreEqual(dstUtcOffset, cairo.GetUtcOffset (d));
1125                                 Assert.AreEqual(dstUtcOffset, cairo.GetUtcOffset (d.Add (new TimeSpan(0,0,0, 1))));
1126
1127                                 d = dst2End.Add (-baseUtcOffset-dstOffset);
1128                                 d = DateTime.SpecifyKind (d, DateTimeKind.Utc);
1129                                 d = d.ToLocalTime ();
1130                                 Assert.AreEqual(dstUtcOffset, cairo.GetUtcOffset (d.Add (new TimeSpan(0,0,0,-1))));
1131                                 Assert.AreEqual(baseUtcOffset, cairo.GetUtcOffset (d));
1132                                 Assert.AreEqual(baseUtcOffset, cairo.GetUtcOffset (d.Add (new TimeSpan(0,0,0, 1))));
1133                         }
1134
1135                         [Test]
1136                         public void GetUtcOffset_FromUnspecified ()
1137                         {
1138                                 var d = dst1Start.Add (dstOffset);
1139                                 Assert.AreEqual(baseUtcOffset, cairo.GetUtcOffset (d.Add (new TimeSpan(0,0,0,-1))));
1140                                 Assert.AreEqual(dstUtcOffset, cairo.GetUtcOffset (d));
1141                                 Assert.AreEqual(dstUtcOffset, cairo.GetUtcOffset (d.Add (new TimeSpan(0,0,0, 1))));
1142
1143                                 d = dst1End.Add (-dstOffset);
1144                                 Assert.AreEqual(dstUtcOffset, cairo.GetUtcOffset (d.Add (new TimeSpan(0,0,0,-1))));
1145                                 Assert.AreEqual(baseUtcOffset, cairo.GetUtcOffset (d));
1146                                 Assert.AreEqual(baseUtcOffset, cairo.GetUtcOffset (d.Add (new TimeSpan(0,0,0, 1))));
1147
1148                                 d = dst2Start.Add (dstOffset);
1149                                 Assert.AreEqual(baseUtcOffset, cairo.GetUtcOffset (d.Add (new TimeSpan(0,0,0,-1))));
1150                                 Assert.AreEqual(dstUtcOffset, cairo.GetUtcOffset (d));
1151                                 Assert.AreEqual(dstUtcOffset, cairo.GetUtcOffset (d.Add (new TimeSpan(0,0,0, 1))));
1152
1153                                 d = dst2End.Add (-dstOffset);
1154                                 Assert.AreEqual(dstUtcOffset, cairo.GetUtcOffset (d.Add (new TimeSpan(0,0,0,-1))));
1155                                 Assert.AreEqual(baseUtcOffset, cairo.GetUtcOffset (d));
1156                                 Assert.AreEqual(baseUtcOffset, cairo.GetUtcOffset (d.Add (new TimeSpan(0,0,0, 1))));
1157                         }
1158
1159                   [Test]
1160                   public void  GetUtcOffset_FromDateTimeOffset ()
1161                   {
1162                           DateTimeOffset offset;
1163
1164                           offset = new DateTimeOffset(dst1Start, baseUtcOffset);
1165                           Assert.AreEqual(baseUtcOffset, cairo.GetUtcOffset(offset.Add(new TimeSpan(0, 0, 0, -1))), "dst1Start_with_baseUtcOffset#before");
1166                           Assert.AreEqual(dstUtcOffset, cairo.GetUtcOffset(offset), "dst1Start_with_baseUtcOffset#exact");
1167                           Assert.AreEqual(dstUtcOffset, cairo.GetUtcOffset(offset.Add(new TimeSpan(0, 0, 0, 1))), "dst1Start_with_baseUtcOffset#after");
1168
1169                           offset = new DateTimeOffset(dst1End, dstOffset + baseUtcOffset);
1170                           Assert.AreEqual(dstUtcOffset, cairo.GetUtcOffset(offset.Add(new TimeSpan(0, 0, 0, -1))), "dst1End_with_dstOffset+baseUtcOffset#before");
1171                           Assert.AreEqual(baseUtcOffset, cairo.GetUtcOffset(offset), "dst1End_with_dstOffset+baseUtcOffset#exact");
1172                           Assert.AreEqual(baseUtcOffset, cairo.GetUtcOffset(offset.Add(new TimeSpan(0, 0, 0, 1))), "dst1End_with_dstOffset+baseUtcOffset#after");
1173
1174                           offset = new DateTimeOffset(dst2Start, baseUtcOffset);
1175                           Assert.AreEqual(baseUtcOffset, cairo.GetUtcOffset(offset.Add(new TimeSpan(0, 0, 0, -1))), "dst2Start_with_baseUtcOffset#before");
1176                           Assert.AreEqual(dstUtcOffset, cairo.GetUtcOffset(offset), "dst2Start_with_baseUtcOffset#exact");
1177                           Assert.AreEqual(dstUtcOffset, cairo.GetUtcOffset(offset.Add(new TimeSpan(0, 0, 0, 1))), "dst2Start_with_baseUtcOffset#after");
1178
1179                           offset = new DateTimeOffset(dst2End, baseUtcOffset + dstOffset);
1180                           Assert.AreEqual(dstUtcOffset, cairo.GetUtcOffset(offset.Add(new TimeSpan(0, 0, 0, -1))), "dst2End_with_dstOffset+baseUtcOffset#before");
1181                           Assert.AreEqual(baseUtcOffset, cairo.GetUtcOffset(offset), "dst2End_with_dstOffset+baseUtcOffset#exact");
1182                           Assert.AreEqual(baseUtcOffset, cairo.GetUtcOffset(offset.Add(new TimeSpan(0, 0, 0, 1))), "dst2End_with_dstOffset+baseUtcOffset#after");
1183                   }
1184
1185                         [Test]
1186                         public void DTS_WithMinimalDate ()
1187                         {
1188                                 TimeZoneInfo.TransitionTime startTransition, endTransition;
1189                                 startTransition = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1, 1, 1, 4, 0, 0),
1190                                                                                                                                                                   10, 2, DayOfWeek.Sunday);
1191                                 endTransition = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1, 1, 1, 3, 0, 0),
1192                                                                                                                                                                 3, 2, DayOfWeek.Sunday);
1193
1194                                 var ctz = TimeZoneInfo.CreateCustomTimeZone ("test", TimeSpan.FromHours (-5), "display", "sdisplay", "dst", new [] {
1195                                         TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule (DateTime.MinValue, DateTime.MaxValue.Date, TimeSpan.FromHours (-1), startTransition, endTransition) });
1196
1197                                 var offset = ctz.GetUtcOffset (DateTime.MinValue);
1198                                 Assert.AreEqual (TimeSpan.FromHours (-5), offset); // TODO: Wrong it should be -6
1199                         }
1200     }
1201
1202                 [TestFixture]
1203                 public class GetDaylightChanges
1204                 {
1205                         MethodInfo getChanges;
1206
1207                         [SetUp]
1208                         public void Setup ()
1209                         {
1210                                 var flags = BindingFlags.Instance | BindingFlags.NonPublic;
1211                                 getChanges = typeof (TimeZoneInfo).GetMethod ("GetDaylightChanges", flags);
1212                         }
1213
1214                         [Test]
1215                         public void TestSydneyDaylightChanges ()
1216                         {
1217                                 TimeZoneInfo tz;
1218                                 if (Environment.OSVersion.Platform == PlatformID.Unix)
1219                                         tz = TimeZoneInfo.FindSystemTimeZoneById ("Australia/Sydney");
1220                                 else
1221                                         tz = TimeZoneInfo.FindSystemTimeZoneById ("W. Australia Standard Time");
1222
1223                                 var changes = (DaylightTime) getChanges.Invoke (tz, new object [] {2014});
1224
1225                                 Assert.AreEqual (new TimeSpan (1, 0, 0), changes.Delta);
1226                                 Assert.AreEqual (new DateTime (2014, 10, 5, 2, 0, 0), changes.Start);
1227                                 Assert.AreEqual (new DateTime (2014, 4, 6, 3, 0, 0), changes.End);
1228                         }
1229
1230                         [Test]
1231                         public void AllTimeZonesDaylightChanges ()
1232                         {
1233                                 foreach (var tz in TimeZoneInfo.GetSystemTimeZones ()) {
1234                                         try {
1235                                                 for (var year = 1950; year <= 2051; year++)
1236                                                         getChanges.Invoke (tz, new object [] {year} );
1237                                         } catch (Exception e) {
1238                                                 Assert.Fail ("TimeZone " + tz.Id + " exception: " + e.ToString ());
1239                                         }
1240                                 }
1241                         }
1242                 }
1243
1244                 [TestFixture]
1245                 public class ParseTZBuffer
1246                 {
1247                         MethodInfo parseTZBuffer;
1248
1249                         [SetUp]
1250                         public void Setup()
1251                         {
1252                                 var flags = BindingFlags.Static | BindingFlags.NonPublic;
1253                                 parseTZBuffer = typeof (TimeZoneInfo).GetMethod ("ParseTZBuffer", flags);
1254                         }
1255
1256                         [Test]
1257                         public void Bug31432 ()
1258                         {
1259                                 // Europe/Moscow from failing device
1260                                 var base64Data = "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";
1261
1262                                 var data = Convert.FromBase64String (base64Data);
1263
1264                                 var tz = parseTZBuffer.Invoke (null, new object[] { "Test", data, data.Length});
1265                                 Assert.IsTrue (tz != null);
1266                         }
1267                 }
1268         }
1269 }