/// <summary>
/// Converts the <see cref="DayOfWeek" /> into a <see cref="Weekday" />.
/// </summary>
/// <param name="dayOfWeek"></param>
/// <returns></returns>
public static Weekday WeekdayForDayOfWeek(DayOfWeek dayOfWeek)
{
int weekdayNumber = (int)dayOfWeek;
if (dayOfWeek == DayOfWeek.Sunday)
{
// Sunday is 0 but should be 7 for an ISO compliant weekday
weekdayNumber = 7;
}
Weekday weekday = (Weekday)weekdayNumber;
// check for a valid value
weekday.Number();
return(weekday);
}
public void Test_Number_Ok(Weekday weekday, int expectedNumber)
{
Assert.Equal(expectedNumber, weekday.Number());
}
private static string FormatWeekday(this Weekday weekday, string format, CultureInfo culture)
{
// use an arbitrary DateTime with the specified weekday and format it only with the full name of the weekday
// -> start with a Sunday and add the specfied weekday value
DateTime dateTime = new DateTime(2019, Month.November.Number(), 3).AddDays(weekday.Number());
return(dateTime.ToString(format, culture));
}