public void TimeElapsedInDaysSince_ValidGameDate_ReturnCorrectNumberOfDays()
{
//ARRANGE
CustomDateTime time = new CustomDateTime(5196, 7, 11);
time.SetNumberOfDaysPerMonth(20);
time.SetNumberOfMonthsInYear(18);
//ACT
long days = time.TimeElapsedInDaysSince(new CustomDateTime(5196, 11, 1, 1, 2));
//ASSERT
Assert.AreEqual(360, time.GetNumberOfDaysInYear());
Assert.AreEqual(70, days);
}