/// <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);
}
}
}
}
