public void Timestamp_Test()
{
// unix stamp 是 1970年1月1日,0:00 GMT，格林尼治时间。也就是 UTC 统一协调时时间
DateTime dateUtc = new DateTime(2018, 1, 29, 7, 53, 5); //1517212385 utc time 7 am, local time 15 pm.
DateTime dateLocal = new DateTime(2018, 1, 29, 15, 53, 5); //1517212385 utc time 7 am, local time 15 pm.
Assert.IsTrue(Timestamp.DateTimeToTimeStampUtc(dateUtc) == 1517212385, Timestamp.DateTimeToTimeStampUtc(dateUtc).ToString());
Assert.IsTrue(Timestamp.TimeStampToDateTimeUtc(1517212385) == dateUtc, Timestamp.TimeStampToDateTimeUtc(1517212385).ToString());
Assert.IsTrue(Timestamp.DateTimeToTimeStampUtc(dateUtc) == Timestamp.DateTimeToTimeStampLocal(dateLocal), Timestamp.DateTimeToTimeStampUtc(dateUtc).ToString());
DateTime utcNow = DateTime.UtcNow;
long ticks = utcNow.Ticks;
long nUtcNow = (ticks - 621355968000000000) / 10000000;
long myUtcNow = Timestamp.DateTimeToTimeStampUtc(new DateTime(ticks));
Assert.IsTrue(myUtcNow == nUtcNow, $"nutcNow = {nUtcNow}, myutcNow={myUtcNow}");
Assert.IsTrue(Timestamp.DateTimeToTimeStampUtc(new DateTime(ticks)) == Timestamp.DateTimeToTimeStampUtc(new DateTime(ticks, DateTimeKind.Utc)));
Assert.IsTrue(Timestamp.DateTimeToTimeStampUtc(new DateTime(ticks)) == Timestamp.DateTimeToTimeStampLocal(new DateTime(ticks, DateTimeKind.Utc).ToLocalTime()));
}
