public void UpdateTimeTest()
{
var ds1 = new DateSpan(2017, 1, 1, 12, 0, 0, 0);
var ds2 = new DateSpan(2017, 1, 1, 13, 30, 30, 500);
var ds3 = new DateSpan(2017, 1, 1, 2, 45, 15, 250);
var t = new Time(13, 30, 30, 500);
var ts = new TimeSpan(0, 2, 45, 15, 250);
ds1.UpdateTime(t);
Assert.AreEqual(ds2, ds1);
ds1.UpdateTime(ts);
Assert.AreEqual(ds3, ds1);
}