public DateInterval(DateTime start, DateTime end)
{
_start = start;
_end = end;
ValidateStartIsBeforeEnd();
_dateDisplayFormat = GetDateDisplayFormat();
}
public void When_DateToString_Then_DateIsProperlyDisplayed(string date, DateDisplayFormat format, string expectedDateString)
{
var dateTime = DateTime.Parse(date);
var result = dateTime.ToString(format);
Assert.AreEqual(expectedDateString, result);
}
public static string ToString(this DateTime dateTime, DateDisplayFormat format)
{
return(format switch
{
DateDisplayFormat.Day => dateTime.GetDayString(),
DateDisplayFormat.DayMonth => dateTime.GetDayMonthString(),
DateDisplayFormat.DayMonthYear => dateTime.GetDayMonthYearString(),
_ => throw new ArgumentOutOfRangeException(nameof(format), format, "Inappropriate format.")
});