using Rhea.Common;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Tiger.Business.MESTests
{
    [TestClass()]
    public class MesTests
    {
        [TestMethod()]
        public void CommonTest()
        {
            var date = new DateTime(2021,1,2);
            
            var firstDay = new DateTime(date.Year, 1, 1);
            int daysOffset = firstDay.DayOfWeek.GetValue() > 3 ? (firstDay.DayOfWeek.GetValue() - 7) : 0;
            int year = date.Year + ((date - firstDay).TotalDays + daysOffset < 0 ? -1 : 0);
            int week = CultureInfo.CurrentCulture.Calendar.GetWeekOfYear(date, CalendarWeekRule.FirstFourDayWeek, DayOfWeek.Sunday);
            var str = $"{year.ToString().Substring(2, 2)}{week:00}";
            ;
        }
    }
}