Unit tests for issue #3333

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

@@ -151,6 +151,40 @@ namespace MonoTests.System
 				TimeZoneInfo.AdjustmentRule r2 = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule (new DateTime (2005,1,1), new DateTime (2007,1,1), new TimeSpan (1,0,0), s2, e2);
 				TimeZoneInfo.CreateCustomTimeZone ("mytimezone", new TimeSpan (6,0,0),null,null,null,new TimeZoneInfo.AdjustmentRule[] {r1, r2});
 			}
+
+			[Test]
+			public void SupportsDaylightSavingTime_NonEmptyAdjustmentRule ()
+			{
+				TimeZoneInfo.TransitionTime s1 = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,4,0,0), 3, 2, DayOfWeek.Sunday);
+				TimeZoneInfo.TransitionTime e1 = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,4,0,0), 10, 2, DayOfWeek.Sunday);
+				TimeZoneInfo.AdjustmentRule r1 = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule (new DateTime (2000,1,1), new DateTime (2005,1,1), new TimeSpan (1,0,0), s1, e1);
+				TimeZoneInfo tz = TimeZoneInfo.CreateCustomTimeZone ("mytimezone", new TimeSpan (6,0,0),null,null,null,new TimeZoneInfo.AdjustmentRule[] {r1});
+				Assert.IsTrue (tz.SupportsDaylightSavingTime);
+			}
+
+			[Test]
+			public void SupportsDaylightSavingTime_EmptyAdjustmentRule ()
+			{
+				TimeZoneInfo tz = TimeZoneInfo.CreateCustomTimeZone ("mytimezone", new TimeSpan (6,0,0),null,null,null,null);
+				Assert.IsFalse (tz.SupportsDaylightSavingTime);
+			}
+
+			[Test]
+			public void SupportsDaylightSavingTime_NonEmptyAdjustmentRule_DisableDaylightSavingTime ()
+			{
+				TimeZoneInfo.TransitionTime s1 = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,4,0,0), 3, 2, DayOfWeek.Sunday);
+				TimeZoneInfo.TransitionTime e1 = TimeZoneInfo.TransitionTime.CreateFloatingDateRule (new DateTime (1,1,1,4,0,0), 10, 2, DayOfWeek.Sunday);
+				TimeZoneInfo.AdjustmentRule r1 = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule (new DateTime (2000,1,1), new DateTime (2005,1,1), new TimeSpan (1,0,0), s1, e1);
+				TimeZoneInfo tz = TimeZoneInfo.CreateCustomTimeZone ("mytimezone", new TimeSpan (6,0,0),null,null,null,new TimeZoneInfo.AdjustmentRule[] {r1}, true);
+				Assert.IsFalse (tz.SupportsDaylightSavingTime);
+			}
+
+			[Test]
+			public void SupportsDaylightSavingTime_EmptyAdjustmentRule_DisableDaylightSavingTime ()
+			{
+				TimeZoneInfo tz = TimeZoneInfo.CreateCustomTimeZone ("mytimezone", new TimeSpan (6,0,0),null,null,null,null,true);
+				Assert.IsFalse (tz.SupportsDaylightSavingTime);
+			}
 		}
 		
 		[TestFixture]