public void PosTest2()
{
System.Globalization.Calendar tbc = new ThaiBuddhistCalendar();
Random rand = new Random(-55);
int year = rand.Next(tbc.GetYear(tbc.MinSupportedDateTime), tbc.GetYear(tbc.MaxSupportedDateTime));
Assert.Equal(year, tbc.ToFourDigitYear(year));
}