private static void CheckToUniversalTime(TzTimeZone zone, string year)
{
// 2007-3-11 @ 2am
Assert.IsFalse(zone.IsDaylightSavingTime(DateTime.Parse(year + "-03-10")));
Assert.IsFalse(zone.IsDaylightSavingTime(DateTime.Parse(year + "-03-11")));
Assert.IsTrue(zone.IsDaylightSavingTime(DateTime.Parse(year + "-03-12")));
Assert.IsFalse(zone.IsDaylightSavingTime(DateTime.Parse(year + "-03-11 01:00")));
Assert.IsFalse(zone.IsDaylightSavingTime(DateTime.Parse(year + "-03-11 01:59")));
Assert.IsTrue(zone.IsDaylightSavingTime(DateTime.Parse(year + "-03-11 02:00")));
Assert.IsTrue(zone.IsDaylightSavingTime(DateTime.Parse(year + "-03-11 02:01")));
Console.WriteLine("DST on rule >= " + year + " for America/Chicago: Mar Sun>=8 2:00 (2am (8:00 UTC) becomes 3am)");
Console.WriteLine("zone.ToUniversalTime('" + year + "-03-11 01:00'): '" + zone.ToUniversalTime(DateTime.Parse(year + "-03-11 01:00")) + "'");
Assert.AreEqual(7, zone.ToUniversalTime(DateTime.Parse(year + "-03-11 01:00")).Hour);
Console.WriteLine("zone.ToUniversalTime('" + year + "-03-11 01:30'): '" + zone.ToUniversalTime(DateTime.Parse(year + "-03-11 01:30")) + "'");
Assert.AreEqual(7, zone.ToUniversalTime(DateTime.Parse(year + "-03-11 01:30")).Hour);
Console.WriteLine("zone.ToUniversalTime('" + year + "-03-11 02:00'): '" + zone.ToUniversalTime(DateTime.Parse(year + "-03-11 02:00")) + "'");
Assert.AreEqual(7, zone.ToUniversalTime(DateTime.Parse(year + "-03-11 02:00")).Hour);
Console.WriteLine("zone.ToUniversalTime('" + year + "-03-11 02:30'): '" + zone.ToUniversalTime(DateTime.Parse(year + "-03-11 02:30")) + "'");
Assert.AreEqual(7, zone.ToUniversalTime(DateTime.Parse(year + "-03-11 02:30")).Hour);
Console.WriteLine("zone.ToUniversalTime('" + year + "-03-11 03:00'): '" + zone.ToUniversalTime(DateTime.Parse(year + "-03-11 03:00")) + "'");
Assert.AreEqual(8, zone.ToUniversalTime(DateTime.Parse(year + "-03-11 03:00")).Hour);
Console.WriteLine("zone.ToUniversalTime('" + year + "-03-11 03:30'): '" + zone.ToUniversalTime(DateTime.Parse(year + "-03-11 03:30")) + "'");
Assert.AreEqual(8, zone.ToUniversalTime(DateTime.Parse(year + "-03-11 03:30")).Hour);
Console.WriteLine("zone.ToUniversalTime('" + year + "-03-11 04:00'): '" + zone.ToUniversalTime(DateTime.Parse(year + "-03-11 04:00")) + "'");
Assert.AreEqual(9, zone.ToUniversalTime(DateTime.Parse(year + "-03-11 04:00")).Hour);
Console.WriteLine("zone.ToUniversalTime('" + year + "-05-10 03:00'): '" + zone.ToUniversalTime(DateTime.Parse(year + "-05-10 03:00")) + "'");
Assert.AreEqual(8, zone.ToUniversalTime(DateTime.Parse(year + "-05-11 03:00")).Hour);
// 2007-11-4 @ 2 am
Assert.IsTrue(zone.IsDaylightSavingTime(DateTime.Parse(year + "-11-4")));
Assert.IsTrue(zone.IsDaylightSavingTime(DateTime.Parse(year + "-11-4")));
Assert.IsFalse(zone.IsDaylightSavingTime(DateTime.Parse(year + "-11-5")));
Assert.IsTrue(zone.IsDaylightSavingTime(DateTime.Parse(year + "-11-4 01:00")));
Assert.IsTrue(zone.IsDaylightSavingTime(DateTime.Parse(year + "-11-4 01:59")));
Assert.IsFalse(zone.IsDaylightSavingTime(DateTime.Parse(year + "-11-4 02:00")));
Assert.IsFalse(zone.IsDaylightSavingTime(DateTime.Parse(year + "-11-4 02:01")));
Console.WriteLine("DST off rule >= " + year + " for America/Chicago: Nov Sun>=1 2:00 (2am (7:00 UTC) becomes 1am)");
Console.WriteLine("zone.ToUniversalTime('" + year + "-11-04 00:00'): '" + zone.ToUniversalTime(DateTime.Parse(year + "-11-04 00:00")) + "'");
Assert.AreEqual(5, zone.ToUniversalTime(DateTime.Parse(year + "-11-04 00:00")).Hour);
Console.WriteLine("zone.ToUniversalTime('" + year + "-11-04 01:00'): '" + zone.ToUniversalTime(DateTime.Parse(year + "-11-04 01:00")) + "'");
Assert.AreEqual(6, zone.ToUniversalTime(DateTime.Parse(year + "-11-04 01:00")).Hour);
Console.WriteLine("zone.ToUniversalTime('" + year + "-11-04 01:30'): '" + zone.ToUniversalTime(DateTime.Parse(year + "-11-04 01:30")) + "'");
Assert.AreEqual(6, zone.ToUniversalTime(DateTime.Parse(year + "-11-04 01:30")).Hour);
Console.WriteLine("zone.ToUniversalTime('" + year + "-11-04 02:00'): '" + zone.ToUniversalTime(DateTime.Parse(year + "-11-04 02:00")) + "'");
Assert.AreEqual(8, zone.ToUniversalTime(DateTime.Parse(year + "-11-04 02:00")).Hour);
Console.WriteLine("zone.ToUniversalTime('" + year + "-11-04 02:30'): '" + zone.ToUniversalTime(DateTime.Parse(year + "-11-04 02:30")) + "'");
Assert.AreEqual(8, zone.ToUniversalTime(DateTime.Parse(year + "-11-04 02:30")).Hour);
Console.WriteLine("zone.ToUniversalTime('" + year + "-11-04 03:00'): '" + zone.ToUniversalTime(DateTime.Parse(year + "-11-04 03:00")) + "'");
Assert.AreEqual(9, zone.ToUniversalTime(DateTime.Parse(year + "-11-04 03:00")).Hour);
Console.WriteLine("zone.ToUniversalTime('" + year + "-11-04 03:30'): '" + zone.ToUniversalTime(DateTime.Parse(year + "-11-04 03:30")) + "'");
Assert.AreEqual(9, zone.ToUniversalTime(DateTime.Parse(year + "-11-04 03:30")).Hour);
Console.WriteLine("zone.ToUniversalTime('" + year + "-12-12 03:00'): '" + zone.ToUniversalTime(DateTime.Parse(year + "-12-12 03:00")) + "'");
Assert.AreEqual(9, zone.ToUniversalTime(DateTime.Parse(year + "-12-04 03:00")).Hour);
}
private static void AssertIsDaylightSavingsTime(TzTimeZone zone, string dt, bool expectIsDaylightSavingsTime)
{
Assert.AreEqual(expectIsDaylightSavingsTime, zone.IsDaylightSavingTime(DateTime.Parse(dt)));
}