public void TestAddDaysDSTSummer() // could be winter as well ;)
{
DateTime utcDt = new DateTime(2018, 7, 27, 22, 0, 0, DateTimeKind.Utc);
DateTime localDt = DateTime.SpecifyKind(TimeZoneInfo.ConvertTimeFromUtc(new DateTime(2018, 7, 27, 22, 0, 0, DateTimeKind.Utc), Verbrauch.CENTRAL_EUROPE_STANDARD_TIME), DateTimeKind.Unspecified);
DateTime resultUtc = utcDt.AddDaysDST(1);
DateTime resultLocal = localDt.AddDaysDST(1);
Assert.AreEqual(DateTimeKind.Utc, resultUtc.Kind);
Assert.AreEqual(DateTimeKind.Unspecified, resultLocal.Kind);
Assert.AreEqual(24, (new TimeRange(utcDt, resultUtc)).Duration.TotalHours);
Assert.AreEqual(24, (new TimeRange()
{
Start = TimeZoneInfo.ConvertTimeToUtc(DateTime.SpecifyKind(localDt, DateTimeKind.Unspecified), Verbrauch.CENTRAL_EUROPE_STANDARD_TIME),
End = TimeZoneInfo.ConvertTimeToUtc(DateTime.SpecifyKind(resultLocal, DateTimeKind.Unspecified), Verbrauch.CENTRAL_EUROPE_STANDARD_TIME)
}).Duration.TotalHours);
}
public void TestAddDaysDSTAutumn()
{
DateTime utcDt = new DateTimeOffset(2018, 10, 27, 22, 0, 0, TimeSpan.Zero).UtcDateTime;
DateTime localDt = DateTime.SpecifyKind(TimeZoneInfo.ConvertTimeFromUtc(new DateTimeOffset(2018, 10, 27, 22, 0, 0, TimeSpan.Zero).UtcDateTime, CentralEuropeStandardTime.CENTRAL_EUROPE_STANDARD_TIME), DateTimeKind.Unspecified);
DateTime resultUtc = utcDt.AddDaysDST(1);
DateTime resultLocal = localDt.AddDaysDST(1);
Assert.AreEqual(DateTimeKind.Utc, resultUtc.Kind);
Assert.AreEqual(DateTimeKind.Unspecified, resultLocal.Kind);
Assert.AreEqual(25, (new TimeRange(utcDt, resultUtc)).Duration.TotalHours);
Assert.AreEqual(25, (new TimeRange()
{
Start = TimeZoneInfo.ConvertTimeToUtc(DateTime.SpecifyKind(localDt, DateTimeKind.Unspecified), CentralEuropeStandardTime.CENTRAL_EUROPE_STANDARD_TIME),
End = TimeZoneInfo.ConvertTimeToUtc(DateTime.SpecifyKind(resultLocal, DateTimeKind.Unspecified), CentralEuropeStandardTime.CENTRAL_EUROPE_STANDARD_TIME)
}).Duration.TotalHours);
}