public void GetModifiedDateAddDaySuccess()
{
var fromDate = DateTime.Parse("10/29/1979");
const DateFunction function = DateFunction.Add;
var span = new DateSpan { Days = 1 };
var result = Calculator.GetModifiedDate(fromDate, function, span);
Assert.AreEqual(30, result.Day);
}
public void GetModifiedDateAddAllSuccess()
{
var fromDate = DateTime.Parse("10/29/1979");
const DateFunction function = DateFunction.Add;
var span = new DateSpan { Years = 1, Months=1, Days=1 };
var result = Calculator.GetModifiedDate(fromDate, function, span);
Assert.AreEqual(DateTime.Parse("11/30/1980").Date, result.Date);
}
public static DateSpan CalculateDifference(DateTime firstDate, DateTime secondDate)
{
var years = CalculateYears(firstDate, secondDate);
var months = CalculateMonths(firstDate, secondDate, years);
var days = CalculateDays(firstDate, secondDate, years, months);
var result = new DateSpan
{
Years = years,
Months = months,
Days = days
};
return result;
}
private void CalculateResultsForAddOrSubtractDate()
{
var fromDate = FromDate.Value;
var function = Add.Checked ? DateFunction.Add : DateFunction.Subtract;
var dateSpan = new DateSpan
{
Years = Convert.ToInt32(Years.Value),
Months = Convert.ToInt32(Months.Value),
Days = Convert.ToInt32(Days.Value)
};
var result = Calculator.GetModifiedDate(fromDate, function, dateSpan);
ResultedDate.Text = result.ToLongDateString();
}
private static DateTime SubtractFromDate(DateTime fromDate, DateSpan dateOffset)
{
return fromDate.AddDays(-dateOffset.Days).AddMonths(-dateOffset.Months).AddYears(-dateOffset.Years);
}
public static DateTime GetModifiedDate(DateTime fromDate, DateFunction function, DateSpan dateOffset)
{
return function == DateFunction.Add ? AddToDate(fromDate, dateOffset) : SubtractFromDate(fromDate, dateOffset);
}
public void GetModifiedDateSubtractYearSuccess()
{
var fromDate = DateTime.Parse("10/29/1979");
const DateFunction function = DateFunction.Subtract;
var span = new DateSpan { Years = 1 };
var result = Calculator.GetModifiedDate(fromDate, function, span);
Assert.AreEqual(1978, result.Year);
}
