public void GetElapsedTime(int day, int elapsedTime, bool isAfterCurrent)
{
Mock <IDatos> idatos = new Mock <IDatos>();
DateTimeService dateTimeService = new DateTimeService();
idatos.Setup(m => m.Date).Returns(new DateTime(2020, 1, day));
dateTimeService.CurrentDateTime = () => new DateTime(2020, 1, 20);
var result = dateTimeService.GetElapsedTime(idatos.Object, isAfterCurrent);
TimeSpan timeSpan = new TimeSpan(elapsedTime, 0, 0, 0);
Assert.AreEqual(timeSpan, result);
}