/// <summary>
/// Checks that each day from the given start year to the end year (inclusive) is equal
/// between the BCL and the Noda Time calendar. Additionally, the number of days in each month and year
/// and the number of months (and leap year status) in each year is checked.
/// </summary>
internal static void AssertEquivalent(Calendar bcl, CalendarSystem noda, int fromYear, int toYear)
{
// We avoid asking the BCL to create a DateTime on each iteration, simply
// because the BCL implementation is so slow. Instead, we just check at the start of each month that
// we're at the date we expect.
DateTime bclDate = bcl.ToDateTime(fromYear, 1, 1, 0, 0, 0, 0);
for (int year = fromYear; year <= toYear; year++)
{
Assert.AreEqual(bcl.GetDaysInYear(year), noda.GetDaysInYear(year), "Year: {0}", year);
Assert.AreEqual(bcl.GetMonthsInYear(year), noda.GetMonthsInYear(year), "Year: {0}", year);
for (int month = 1; month <= noda.GetMonthsInYear(year); month++)
{
// Sanity check at the start of each month. Even this is surprisingly slow.
// (These three tests make up about 20% of the total execution time for the test.)
Assert.AreEqual(year, bcl.GetYear(bclDate));
Assert.AreEqual(month, bcl.GetMonth(bclDate));
Assert.AreEqual(1, bcl.GetDayOfMonth(bclDate));
Assert.AreEqual(bcl.GetDaysInMonth(year, month), noda.GetDaysInMonth(year, month),
"Year: {0}; Month: {1}", year, month);
Assert.AreEqual(bcl.IsLeapYear(year), noda.IsLeapYear(year), "Year: {0}", year);
for (int day = 1; day <= noda.GetDaysInMonth(year, month); day++)
{
LocalDate nodaDate = new LocalDate(year, month, day, noda);
Assert.AreEqual(bclDate, nodaDate.ToDateTimeUnspecified(),
"Original calendar system date: {0:yyyy-MM-dd}", nodaDate);
Assert.AreEqual(nodaDate, LocalDate.FromDateTime(bclDate, noda));
Assert.AreEqual(year, nodaDate.Year);
Assert.AreEqual(month, nodaDate.Month);
Assert.AreEqual(day, nodaDate.Day);
bclDate = bclDate.AddDays(1);
}
}
}
}
/// <summary>
/// Initializes a new instance of <see cref="Age"/>.
/// </summary>
/// <param name="start">The date and time when the age started.</param>
/// <param name="end">The date and time when the age ended.</param>
/// <param name="calendar">Calendar used to calculate age.</param>
public Age(DateTime start, DateTime end, Calendar calendar)
{
if (start > end) throw new ArgumentException("The starting date cannot be later than the end date.");
var startDate = start.Date;
var endDate = end.Date;
_years = _months = _days = 0;
_days += calendar.GetDayOfMonth(endDate) - calendar.GetDayOfMonth(startDate);
if (_days < 0)
{
_days += calendar.GetDaysInMonth(calendar.GetYear(startDate), calendar.GetMonth(startDate));
_months--;
}
_months += calendar.GetMonth(endDate) - calendar.GetMonth(startDate);
if (_months < 0)
{
_months += calendar.GetMonthsInYear(calendar.GetYear(startDate));
_years--;
}
_years += calendar.GetYear(endDate) - calendar.GetYear(startDate);
var ts = endDate.Subtract(startDate);
_totalDays = (Int32)ts.TotalDays;
}
private static bool IsValidMonth( Calendar calendar, int year, int month, int era )
{
Contract.Requires( calendar != null );
if ( month < 1 )
return false;
if ( year == calendar.MinSupportedDateTime.Year && month < calendar.MinSupportedDateTime.Month )
return false;
return month <= calendar.GetMonthsInYear( year, era );
}
/// <summary>
/// Determines if the specified <paramref name="month"/> is a valid month value.
/// </summary>
/// <param name="month">The month value.</param>
/// <param name="year">The year value.</param>
/// <param name="cal">The calendar to use.</param>
/// <returns>true if it's a valid month value; false otherwise.</returns>
private static bool IsValidMonth(int month, int year, Calendar cal)
{
year = cal.ToFourDigitYear(year);
return month >= 1 && month <= cal.GetMonthsInYear(year);
}
public void TestDaysInYear (Calendar calendar, int year)
{
var daysInYear = calendar.GetDaysInYear (year);
var daysInMonths = 0;
var monthInYear = calendar.GetMonthsInYear (year);
for (var m = 1; m <= monthInYear; m++)
daysInMonths += calendar.GetDaysInMonth (year, m);
Assert.AreEqual (daysInYear, daysInMonths, string.Format("Calendar:{0} Year:{1}",calendar.GetType(), year));
}
public static int Month( this DateTime date, Calendar calendar )
{
Arg.NotNull( calendar, nameof( calendar ) );
Contract.Ensures( Contract.Result<int>() > 0 );
Contract.Ensures( Contract.Result<int>() <= calendar.GetMonthsInYear( date.Year ) );
return calendar.GetMonth( date );
}
