计算“工作时间”使用TimePeriod.NET'的CalendarPeriodCollector会得到意想不到

我正在计算服务水平协议的到期日，同时，我还需要反向计算另一个方向的服务水平协议。

我一直在努力计算"工作时间"(即在一组天内工作的时间)，并决定使用一个名为TimePeriodLibrary的第三方库。. NET用于任务。我需要能够做两件事:

• 给定起始DateTime和TimeSpan，您应该接收到服务水平协议日期到期(日期到期)的DateTime。
• 给定开始DateTime和结束DateTime，您应该收到一个TimeSpan，该服务水平协议应该花费多长时间。

所有源代码(测试项目在GitHub上)。我有一个ServiceLevelManager类做所有的工作。它需要WorkDays和HolidayPeriods的列表，以便计算出哪些时间可以工作。CalendarPeriodCollector类给出了意想不到的结果。从时间范围确定到期日期的期望在我重新计算它们时没有正确计算。

有人能看到我是否做错了什么，或者库是否有bug?

namespace ServicePlanner
{
    using System;
    using System.Collections.Generic;
    using Itenso.TimePeriod;
    public class ServicePlannerManager
    {
        public ServicePlannerManager(IEnumerable<WorkDay> workDays, IEnumerable<HolidayPeriod> holidays)
        {
            this.WorkDays = workDays;
            this.Holidays = holidays;
        }
        public IEnumerable<WorkDay> WorkDays { get; set; }
        public IEnumerable<HolidayPeriod> Holidays { get; set; }
        public TimeSpan GetRemainingWorkingTime(DateTime start, DateTime dueDate)
        {
            var filter = new CalendarPeriodCollectorFilter();
            foreach (var dayOfWeek in this.WorkDays)
            {
                filter.CollectingDayHours.Add(new DayHourRange(dayOfWeek.DayOfWeek, new Time(dayOfWeek.StartTime), new Time(dayOfWeek.EndTime)));
            }
            foreach (var holiday in this.Holidays)
            {
                filter.ExcludePeriods.Add(new TimeBlock(holiday.StartTime, holiday.EndTime));
            }
            var range = new CalendarTimeRange(start, dueDate);
            var collector = new CalendarPeriodCollector(filter, range);
            collector.CollectHours();
            var duration = collector.Periods.GetTotalDuration(new TimeZoneDurationProvider(TimeZoneInfo.FindSystemTimeZoneById("UTC")));
            return duration;
            //var rounded = Math.Round(duration.TotalMinutes, MidpointRounding.AwayFromZero);
            //return TimeSpan.FromMinutes(rounded);
        }
    }
}

失败的单元测试提取如下:

[TestFixture]
public class ServicePlannerManagerTest
{
        [Test, TestCaseSource("LocalSource")]
    public void GetRemainingWorkingTimeWithHolidayShouldOnlyEnumerateWorkingTime(DateTime startTime, TimeSpan workingHours, DateTime expectedDueDate, string expectation)
    {
        // Arrange
        var workDays = new List<WorkDay>
        { 
            new WorkDay(DayOfWeek.Monday, new DateTime(1, 1, 1, 9, 0, 0), new DateTime(1, 1, 1, 17, 0, 0)),
            new WorkDay(DayOfWeek.Tuesday, new DateTime(1, 1, 1, 9, 0, 0), new DateTime(1, 1, 1, 17, 0, 0)),
            new WorkDay(DayOfWeek.Wednesday, new DateTime(1, 1, 1, 9, 0, 0), new DateTime(1, 1, 1, 17, 0, 0)),
            new WorkDay(DayOfWeek.Thursday, new DateTime(1, 1, 1, 9, 0, 0), new DateTime(1, 1, 1, 17, 0, 0)),
            new WorkDay(DayOfWeek.Friday, new DateTime(1, 1, 1, 9, 0, 0), new DateTime(1, 1, 1, 17, 0, 0)),
        };
        var holidayPeriods = new List<HolidayPeriod>
        { 
            new HolidayPeriod(new DateTime(2015, 9, 15, 00, 0, 0), new DateTime(2015, 9, 16, 0, 0, 0))
        };
        var service = new ServicePlannerManager(workDays, holidayPeriods);
        // Act
        var result = service.GetRemainingWorkingTime(startTime, expectedDueDate);
        // Assert - 
        Assert.AreEqual(workingHours.TotalHours, result.TotalHours, expectation);
    }
    protected IEnumerable LocalSource()
    {
        yield return
            new TestCaseData(
                new DateTime(2015, 9, 14, 9, 0, 0),
                new TimeSpan(23, 0, 0),
                new DateTime(2015, 9, 17, 16, 0, 0),
                    "5. Expected 23 hours of working time to end on the 17/09/2015 16:00. Monday to Thursday evening. Just short of 3 full working days by one hour. Tuesday is holiday.");
    }
}

这个测试的输出是

5. Expected 23 hours of working time to end on the 17/09/2015 16:00. Monday to Thursday evening. Just short of 3 full working days by one hour. Tuesday is holiday.
Expected: 23.0d
But was:  15.999999999944444d

我想知道我是否错误地使用了收集器，或者收集器是否有错误。

        [Test, TestCaseSource("LocalSource")]
    public void SO_GetRemainingWorkingTimeWithHolidayShouldOnlyEnumerateWorkingTime(DateTime startTime,
        TimeSpan workingHours, DateTime expectedDueDate, string expectation)
    {
        CalendarPeriodCollectorFilter filter = new CalendarPeriodCollectorFilter();
        filter.Months.Add(YearMonth.September); // only Januaries
        filter.WeekDays.Add(DayOfWeek.Monday); // 
        filter.WeekDays.Add(DayOfWeek.Tuesday); // 
        filter.WeekDays.Add(DayOfWeek.Wednesday); // 
        filter.WeekDays.Add(DayOfWeek.Thursday); // 
        filter.WeekDays.Add(DayOfWeek.Friday); // 
        filter.CollectingHours.Add(new HourRange(9, 17)); // working hours
        CalendarTimeRange testPeriod = new CalendarTimeRange(startTime, expectedDueDate);//new DateTime(2015, 9, 14, 9, 0, 0), new DateTime(2015, 9, 17, 18, 0, 0));
        Console.WriteLine("Calendar period collector of period: " + testPeriod);
        filter.ExcludePeriods.Add(new TimeBlock(new DateTime(2015, 9, 15, 00, 0, 0), new DateTime(2015, 9, 16, 0, 0, 0)));
        CalendarPeriodCollector collector = new CalendarPeriodCollector(filter, testPeriod);
        collector.CollectHours();
        foreach (ITimePeriod period in collector.Periods)
        {
            Console.WriteLine("Period: " + period); // THIS WILL HELP A LOT!
        }
        var result = collector.Periods.GetTotalDuration(new TimeZoneDurationProvider(TimeZoneInfo.FindSystemTimeZoneById("UTC")));
        Console.WriteLine(result);
            //
    }

Calendar period collector of period: 14/09/2015 09:00:00 - 17/09/2015 15:59:59 | 3.06:59
Period: 14/09/2015 09:00:00 - 14/09/2015 16:59:59 | 0.07:59
Period: 16/09/2015 09:00:00 - 16/09/2015 16:59:59 | 0.07:59
15:59:59.9999998