public void Weekly_EveryThirdWeek()
{
// Arrange.
IRecurring weekly = Recurs
.Starting(new DateTime(2015, 1, 1))
.Every(3)
.Weeks()
.OnDays(Day.TUESDAY | Day.FRIDAY)
.Ending(new DateTime(2015, 2, 19))
.Build();
// Act.
// Assert.
Assert.Equal(new DateTime(2015, 1, 2), weekly.Next(new DateTime(2014, 1, 1)));
Assert.Equal(new DateTime(2015, 1, 20), weekly.Next(new DateTime(2015, 1, 2)));
Assert.Equal(new DateTime(2015, 1, 23), weekly.Next(new DateTime(2015, 1, 21)));
Assert.Equal(new DateTime(2015, 2, 10), weekly.Next(new DateTime(2015, 1, 23)));
Assert.Equal(new DateTime(2015, 2, 10), weekly.Next(new DateTime(2015, 1, 24)));
Assert.Equal(new DateTime(2015, 2, 10), weekly.Next(new DateTime(2015, 1, 27)));
Assert.Equal(new DateTime(2015, 2, 13), weekly.Next(new DateTime(2015, 2, 10)));
Assert.Equal(new DateTime(2015, 1, 2), weekly.Previous(new DateTime(2015, 1, 3)));
Assert.Equal(new DateTime(2015, 1, 20), weekly.Previous(new DateTime(2015, 1, 21)));
Assert.Equal(new DateTime(2015, 1, 23), weekly.Previous(new DateTime(2015, 1, 24)));
Assert.Equal(new DateTime(2015, 2, 10), weekly.Previous(new DateTime(2015, 2, 11)));
Assert.Equal(new DateTime(2015, 2, 10), weekly.Previous(new DateTime(2015, 2, 13)));
Assert.Equal(new DateTime(2015, 2, 13), weekly.Previous(new DateTime(2015, 2, 14)));
}
public void Daily_EveryThirdDay_ExcludeWeekends()
{
// Arrange.
IRecurring daily = Recurs
.Starting(new DateTime(2015, 1, 1))
.Every(3)
.Days()
.Including(Day.MONDAY | Day.TUESDAY | Day.WEDNESDAY | Day.THURSDAY | Day.FRIDAY)
.Build();
// Act.
// Assert.
Assert.Equal(new DateTime(2015, 1, 1), daily.Next(new DateTime(2014, 7, 3)));
Assert.Equal(new DateTime(2015, 1, 6), daily.Next(new DateTime(2015, 1, 1)));
Assert.Equal(new DateTime(2015, 1, 9), daily.Next(new DateTime(2015, 1, 6)));
Assert.Equal(new DateTime(2015, 1, 14), daily.Next(new DateTime(2015, 1, 9)));
}
public void Daily_EveryDay()
{
// Arrange.
IRecurring daily = Recurs
.Starting(new DateTime(2015, 1, 1))
.Every(1)
.Days()
.Ending(new DateTime(2015, 1, 15))
.Build();
// Act.
// Assert.
Assert.Equal(new DateTime(2015, 1, 1), daily.Next(new DateTime(2014, 7, 3)));
Assert.Equal(new DateTime(2015, 1, 2), daily.Next(new DateTime(2015, 1, 1)));
Assert.Equal(new DateTime(2015, 1, 3), daily.Next(new DateTime(2015, 1, 2)));
Assert.Null(daily.Next(new DateTime(2015, 1, 15)));
}
public void Daily_EveryThirdDay()
{
// Arrange.
IRecurring daily = Recurs
.Starting(new DateTime(2015, 1, 1))
.Every(3)
.Days()
.Ending(new DateTime(2015, 1, 15))
.Build();
// Act.
// Assert.
Assert.Equal(new DateTime(2015, 1, 1), daily.Next(new DateTime(2014, 7, 3)));
Assert.Equal(new DateTime(2015, 1, 4), daily.Next(new DateTime(2015, 1, 1)));
Assert.Equal(new DateTime(2015, 1, 7), daily.Next(new DateTime(2015, 1, 5)));
Assert.Equal(new DateTime(2015, 1, 13), daily.Next(new DateTime(2015, 1, 10)));
}
public void Weekly_EveryWeek_SameTimeAsDateTime()
{
// Arrange.
DateTime startDate = new DateTime(2020, 04, 06, 10, 00, 00);
IRecurring weekly = Recurs
.Starting(startDate)
.Every(1)
.Weeks()
.OnDay(DayOfWeek.Monday)
.Ending(new DateTime(2021, 2, 19))
.Build();
// Act.
// Assert.
Assert.Equal(new DateTime(2020, 04, 13, 10, 00, 00), weekly.Next(new DateTime(2020, 04, 06, 11, 00, 00)));
Assert.Equal(new DateTime(2020, 04, 20, 10, 00, 00), weekly.Next(new DateTime(2020, 04, 13, 10, 00, 00)));
Assert.Equal(new DateTime(2020, 04, 20, 10, 00, 00), weekly.Next(new DateTime(2020, 04, 20, 09, 00, 00)));
}
public void Weekly_EveryWeek()
{
// Arrange.
IRecurring weekly = Recurs
.Starting(new DateTime(2015, 1, 1))
.Every(1)
.Weeks()
.OnDays(Day.TUESDAY | Day.FRIDAY)
.Ending(new DateTime(2015, 2, 19))
.Build();
// Act.
// Assert.
Assert.Equal(new DateTime(2015, 1, 2), weekly.Next(new DateTime(2014, 1, 1)));
Assert.Equal(new DateTime(2015, 1, 6), weekly.Next(new DateTime(2015, 1, 2)));
Assert.Equal(new DateTime(2015, 1, 9), weekly.Next(new DateTime(2015, 1, 6)));
Assert.Equal(new DateTime(2015, 1, 13), weekly.Next(new DateTime(2015, 1, 9)));
Assert.Equal(new DateTime(2015, 1, 16), weekly.Next(new DateTime(2015, 1, 13)));
}
public void Monthly_EveryMonth_Ordinal()
{
// Arrange.
IRecurring monthly = Recurs
.Starting(new DateTime(2018, 1, 1))// Monday
.Every(1)
.Months()
.OnOrdinalWeek(Ordinal.SECOND)
.OnDay(DayOfWeek.Friday)
.Ending(new DateTime(2018, 12, 25))
.Build();
// Act.
// Assert.
Assert.Equal(new DateTime(2018, 1, 12), monthly.Next(new DateTime(2017, 1, 1)));
Assert.Equal(new DateTime(2018, 1, 12), monthly.Next(new DateTime(2018, 1, 1)));
Assert.Equal(new DateTime(2018, 2, 9), monthly.Next(new DateTime(2018, 2, 1)));
Assert.Equal(new DateTime(2018, 9, 14), monthly.Next(new DateTime(2018, 9, 1)));
Assert.Null(monthly.Next(new DateTime(2020, 2, 1)));
}
public void Yearly_EveryYear_DifferentDaysInMonth()
{
// Arrange.
IRecurring yearly = Recurs
.Starting(new DateTime(2015, 1, 1))
.Every(1)
.Years()
.OnDay(31)
.OnMonths(Month.JANUARY | Month.FEBRUARY | Month.AUGUST)
.Ending(new DateTime(2020, 1, 1))
.Build();
// Act.
// Assert.
Assert.Equal(new DateTime(2015, 1, 31), yearly.Next(new DateTime(2014, 1, 1)));
Assert.Equal(new DateTime(2015, 1, 31), yearly.Next(new DateTime(2015, 1, 6)));
Assert.Equal(new DateTime(2015, 2, 28), yearly.Next(new DateTime(2015, 1, 31)));
Assert.Equal(new DateTime(2015, 2, 28), yearly.Next(new DateTime(2015, 2, 27)));
Assert.Equal(new DateTime(2015, 8, 31), yearly.Next(new DateTime(2015, 2, 28)));
Assert.Null(yearly.Next(new DateTime(2020, 1, 1)));
Assert.Equal(new DateTime(2015, 1, 31), yearly.Previous(new DateTime(2015, 2, 1)));
Assert.Equal(new DateTime(2015, 1, 31), yearly.Previous(new DateTime(2015, 2, 28)));
Assert.Equal(new DateTime(2015, 2, 28), yearly.Previous(new DateTime(2015, 3, 1)));
Assert.Equal(new DateTime(2015, 2, 28), yearly.Previous(new DateTime(2015, 3, 1)));
Assert.Equal(new DateTime(2015, 8, 31), yearly.Previous(new DateTime(2015, 9, 1)));
Assert.Null(yearly.Previous(new DateTime(2015, 1, 31)));
}
public void Yearly_EveryThirdYear_Ordinal()
{
// Arrange.
var startDate = new DateTime(2018, 1, 1);
IRecurring yearly = Recurs
.Starting(startDate)
.Every(3)
.Years()
.OnOrdinalWeek(Ordinal.THIRD)
.OnDay(DayOfWeek.Thursday)
.OnMonths(Month.JANUARY)
.Ending(new DateTime(2030, 1, 1))
.Build();
// Act.
// Assert.
Assert.Equal(new DateTime(2018, 1, 18), yearly.Next(new DateTime(2014, 1, 1)));
Assert.Equal(new DateTime(2018, 1, 18), yearly.Next(new DateTime(2014, 1, 1)));
Assert.Equal(new DateTime(2018, 1, 18), yearly.Next(new DateTime(2018, 1, 1)));
Assert.Equal(new DateTime(2018, 1, 18), yearly.Next(new DateTime(2018, 1, 18)));
Assert.Equal(new DateTime(2024, 1, 18), yearly.Next(new DateTime(2021, 2, 18)));
Assert.Null(yearly.Next(new DateTime(2030, 1, 1)));
Assert.Equal(new DateTime(2018, 1, 18), yearly.Previous(new DateTime(2018, 1, 19)));
Assert.Equal(new DateTime(2018, 1, 18), yearly.Previous(new DateTime(2021, 1, 21)));
Assert.Equal(new DateTime(2021, 1, 21), yearly.Previous(new DateTime(2021, 1, 22)));
Assert.Equal(new DateTime(2024, 1, 18), yearly.Previous(new DateTime(2024, 1, 19)));
Assert.Null(yearly.Previous(new DateTime(2018, 1, 18)));
}
public void Weekly_EveryWeek_TwoDaysAfterDateTime()
{
// Arrange.
DateTime startDate = new DateTime(2015, 1, 1);
IRecurring weekly = Recurs
.Starting(startDate)
.Every(1)
.Weeks()
.OnDay(DayOfWeek.Saturday)
.Ending(new DateTime(2015, 2, 19))
.Build();
// Act.
// Assert.
Assert.Equal(new DateTime(2015, 1, 3), weekly.Next(new DateTime(2014, 1, 1)));
Assert.Equal(new DateTime(2015, 1, 3), weekly.Next(new DateTime(2015, 1, 2)));
Assert.Equal(new DateTime(2015, 1, 10), weekly.Next(new DateTime(2015, 1, 6)));
Assert.Equal(new DateTime(2015, 1, 10), weekly.Next(new DateTime(2015, 1, 9)));
Assert.Equal(new DateTime(2015, 1, 17), weekly.Next(new DateTime(2015, 1, 13)));
Assert.Null(weekly.Next(new DateTime(2015, 2, 19)));
Assert.Equal(new DateTime(2015, 1, 3), weekly.Previous(new DateTime(2015, 1, 4)));
Assert.Equal(new DateTime(2015, 1, 3), weekly.Previous(new DateTime(2015, 1, 10)));
Assert.Equal(new DateTime(2015, 1, 10), weekly.Previous(new DateTime(2015, 1, 11)));
Assert.Equal(new DateTime(2015, 1, 10), weekly.Previous(new DateTime(2015, 1, 17)));
Assert.Equal(new DateTime(2015, 1, 17), weekly.Previous(new DateTime(2015, 1, 18)));
Assert.Null(weekly.Previous(new DateTime(2015, 1, 3)));
}
public void Monthly_EveryMonth_Ordinal_LastWeek()
{
// Arrange.
IRecurring monthly = Recurs
.Starting(new DateTime(2018, 1, 1)) // Monday
.Every(1)
.Months()
.OnOrdinalWeek(Ordinal.LAST)
.OnDay(DayOfWeek.Wednesday)
.Ending(new DateTime(2018, 12, 25))
.Build();
// Act.
// Assert.
Assert.Equal(new DateTime(2018, 1, 31), monthly.Next(new DateTime(2017, 1, 1)));
Assert.Equal(new DateTime(2018, 1, 31), monthly.Next(new DateTime(2018, 1, 1)));
Assert.Equal(new DateTime(2018, 1, 31), monthly.Next(new DateTime(2018, 1, 31)));
Assert.Equal(new DateTime(2018, 2, 28), monthly.Next(new DateTime(2018, 2, 1)));
Assert.Equal(new DateTime(2018, 4, 25), monthly.Next(new DateTime(2018, 4, 1)));
Assert.Null(monthly.Next(new DateTime(2020, 2, 1)));
Assert.Equal(new DateTime(2018, 1, 31), monthly.Previous(new DateTime(2018, 2, 1)));
Assert.Equal(new DateTime(2018, 1, 31), monthly.Previous(new DateTime(2018, 2, 28)));
Assert.Equal(new DateTime(2018, 2, 28), monthly.Previous(new DateTime(2018, 3, 1)));
Assert.Equal(new DateTime(2018, 3, 28), monthly.Previous(new DateTime(2018, 4, 25)));
Assert.Equal(new DateTime(2018, 4, 25), monthly.Previous(new DateTime(2018, 4, 26)));
Assert.Null(monthly.Previous(new DateTime(2018, 1, 31)));
}
public void Weekly_Every2Weeks_SunMon()
{
// Arrange.
DateTime startDate = new DateTime(2018, 2, 22);
IRecurring weekly = Recurs
.Starting(startDate)
.Every(2)
.Weeks()
.FirstDayOfWeek(DayOfWeek.Monday)
.OnDays(Day.SUNDAY | Day.MONDAY)
.Ending(new DateTime(2018, 8, 28))
.Build();
// Act.
// Assert.
Assert.Equal(new DateTime(2018, 2, 25), weekly.Next(new DateTime(2018, 2, 24)));
Assert.Equal(new DateTime(2018, 3, 5), weekly.Next(new DateTime(2018, 2, 25)));
Assert.Equal(new DateTime(2018, 3, 5), weekly.Next(new DateTime(2018, 3, 3)));
Assert.Equal(new DateTime(2018, 3, 11), weekly.Next(new DateTime(2018, 3, 5)));
Assert.Equal(new DateTime(2018, 3, 19), weekly.Next(new DateTime(2018, 3, 11)));
Assert.Equal(new DateTime(2018, 3, 25), weekly.Next(new DateTime(2018, 3, 20)));
Assert.Equal(new DateTime(2018, 4, 2), weekly.Next(new DateTime(2018, 4, 1)));
Assert.Equal(new DateTime(2018, 4, 8), weekly.Next(new DateTime(2018, 4, 3)));
Assert.Null(weekly.Next(new DateTime(2018, 8, 28)));
Assert.Equal(new DateTime(2018, 2, 25), weekly.Previous(new DateTime(2018, 2, 26)));
Assert.Equal(new DateTime(2018, 3, 5), weekly.Previous(new DateTime(2018, 3, 6)));
Assert.Equal(new DateTime(2018, 3, 5), weekly.Previous(new DateTime(2018, 3, 11)));
Assert.Equal(new DateTime(2018, 3, 11), weekly.Previous(new DateTime(2018, 3, 12)));
Assert.Equal(new DateTime(2018, 3, 19), weekly.Previous(new DateTime(2018, 3, 25)));
Assert.Equal(new DateTime(2018, 3, 25), weekly.Previous(new DateTime(2018, 4, 2)));
Assert.Equal(new DateTime(2018, 4, 2), weekly.Previous(new DateTime(2018, 4, 3)));
Assert.Equal(new DateTime(2018, 4, 8), weekly.Previous(new DateTime(2018, 4, 9)));
Assert.Null(weekly.Previous(new DateTime(2018, 2, 25)));
}
public void Yearly_MultipleMonths_Ordinal()
{
// Arrange.
var startDate = new DateTime(2018, 1, 1);
IRecurring yearly = Recurs
.Starting(startDate)
.Every(1)
.Years()
.OnOrdinalWeek(Ordinal.THIRD)
.OnDay(DayOfWeek.Thursday)
.OnMonths(Month.JANUARY | Month.APRIL)
.Ending(new DateTime(2030, 1, 1))
.Build();
// Act.
// Assert.
Assert.Equal(new DateTime(2018, 1, 18), yearly.Next(new DateTime(2014, 1, 1)));
Assert.Equal(new DateTime(2018, 1, 18), yearly.Next(new DateTime(2018, 1, 1)));
Assert.Equal(new DateTime(2018, 4, 19), yearly.Next(new DateTime(2018, 1, 18)));
Assert.Equal(new DateTime(2019, 1, 17), yearly.Next(new DateTime(2018, 4, 19)));
Assert.Null(yearly.Next(new DateTime(2030, 1, 1)));
}
public void Monthly_EveryFirstMonth_Ordinal_SameDay()
{
// Arrange.
IRecurring monthly = Recurs
.Starting(new DateTime(2020, 04, 06, 13, 00, 00)) // Monday
.Every(1)
.Months()
.OnOrdinalWeek(Ordinal.FIRST)
.OnDay(DayOfWeek.Monday)
.Build();
// Act.
// Assert.
Assert.Equal(new DateTime(2020, 05, 04, 13, 00, 00), monthly.Next(new DateTime(2020, 04, 06, 14, 00, 00)));
}
public void Monthly_EveryLastMonth_Ordinal_SameDay()
{
// Arrange.
IRecurring monthly = Recurs
.Starting(new DateTime(2019, 04, 30, 13, 00, 00)) // Tuesday
.Every(1)
.Months()
.OnOrdinalWeek(Ordinal.LAST)
.OnDay(DayOfWeek.Monday)
.Build();
// Act.
// Assert.
Assert.Equal(new DateTime(2019, 05, 27, 13, 00, 00), monthly.Next(new DateTime(2019, 05, 27, 09, 00, 00)));
}
public void Yearly_EveryYear_Ordinal_Today()
{
// Arrange.
var startDate = new DateTime(2019, 1, 1, 12, 00, 00);
IRecurring yearly = Recurs
.Starting(startDate)
.Every(1)
.Years()
.OnOrdinalWeek(Ordinal.FIRST)
.OnDay(DayOfWeek.Monday)
.OnMonths(Month.JANUARY)
.Ending(new DateTime(2030, 1, 1))
.Build();
// Act.
// Assert.
Assert.Equal(new DateTime(2020, 01, 6, 12, 00, 00), yearly.Next(new DateTime(2020, 01, 06, 08, 00, 00)));
}
public void Yearly_EndAfterNumOfOccurences()
{
IRecurring recur = Recurs
.Starting(new DateTime(2015, 1, 1))
.Every(3)
.Years()
.OnDay(24)
.OnMonths(Month.JANUARY | Month.FEBRUARY | Month.AUGUST)
.Ending(6)
.Build();
Assert.Equal(new DateTime(2015, 1, 24), recur.Next(new DateTime(2014, 2, 1)));
Assert.Equal(new DateTime(2015, 2, 24), recur.Next(new DateTime(2015, 1, 24)));
Assert.Equal(new DateTime(2015, 8, 24), recur.Next(new DateTime(2015, 2, 24)));
Assert.Equal(new DateTime(2018, 1, 24), recur.Next(new DateTime(2015, 8, 24)));
Assert.Equal(new DateTime(2018, 2, 24), recur.Next(new DateTime(2018, 1, 24)));
Assert.Equal(new DateTime(2018, 8, 24), recur.Next(new DateTime(2018, 2, 24)));
Assert.Null(recur.Next(new DateTime(2018, 8, 24)));
}
public void Monthly_EveryThirdMonth()
{
// Arrange.
IRecurring monthly = Recurs
.Starting(new DateTime(2015, 1, 1))
.Every(3)
.Months()
.OnDay(24)
.Ending(new DateTime(2016, 2, 4))
.Build();
// Act.
// Assert.
Assert.Equal(new DateTime(2015, 1, 24), monthly.Next(new DateTime(2014, 2, 1)));
Assert.Equal(new DateTime(2015, 4, 24), monthly.Next(new DateTime(2015, 1, 24)));
Assert.Equal(new DateTime(2015, 4, 24), monthly.Next(new DateTime(2015, 1, 25)));
Assert.Equal(new DateTime(2015, 4, 24), monthly.Next(new DateTime(2015, 2, 1)));
Assert.Equal(new DateTime(2015, 4, 24), monthly.Next(new DateTime(2015, 2, 17)));
Assert.Equal(new DateTime(2015, 4, 24), monthly.Next(new DateTime(2015, 4, 23)));
Assert.Equal(new DateTime(2015, 7, 24), monthly.Next(new DateTime(2015, 4, 24)));
Assert.Null(monthly.Next(new DateTime(2016, 6, 3)));
}
public void Monthly_EveryMonth_DifferentDaysInMonths()
{
// Arrange.
IRecurring monthly = Recurs
.Starting(new DateTime(2015, 1, 1))
.Every(1)
.Months()
.OnDay(31)
.Ending(new DateTime(2016, 2, 4))
.Build();
// Act.
// Assert.
Assert.Equal(new DateTime(2015, 1, 31), monthly.Next(new DateTime(2014, 2, 1)));
Assert.Equal(new DateTime(2015, 1, 31), monthly.Next(new DateTime(2015, 1, 30)));
Assert.Equal(new DateTime(2015, 2, 28), monthly.Next(new DateTime(2015, 1, 31)));
Assert.Equal(new DateTime(2015, 2, 28), monthly.Next(new DateTime(2015, 2, 27)));
Assert.Equal(new DateTime(2015, 3, 31), monthly.Next(new DateTime(2015, 2, 28)));
Assert.Equal(new DateTime(2015, 4, 30), monthly.Next(new DateTime(2015, 3, 31)));
Assert.Null(monthly.Next(new DateTime(2016, 6, 3)));
}
public void Yearly_EveryYear()
{
// Arrange.
IRecurring yearly = Recurs
.Starting(new DateTime(2015, 1, 1))
.Every(1)
.Years()
.OnDay(24)
.OnMonths(Month.JANUARY | Month.FEBRUARY | Month.AUGUST)
.Ending(new DateTime(2020, 1, 1))
.Build();
// Act.
// Assert.
Assert.Equal(new DateTime(2015, 1, 24), yearly.Next(new DateTime(2014, 1, 1)));
Assert.Equal(new DateTime(2015, 1, 24), yearly.Next(new DateTime(2015, 1, 1)));
Assert.Equal(new DateTime(2015, 1, 24), yearly.Next(new DateTime(2015, 1, 23)));
Assert.Equal(new DateTime(2015, 2, 24), yearly.Next(new DateTime(2015, 1, 24)));
Assert.Equal(new DateTime(2015, 2, 24), yearly.Next(new DateTime(2015, 1, 25)));
Assert.Equal(new DateTime(2015, 2, 24), yearly.Next(new DateTime(2015, 2, 1)));
Assert.Equal(new DateTime(2015, 2, 24), yearly.Next(new DateTime(2015, 2, 23)));
Assert.Equal(new DateTime(2015, 8, 24), yearly.Next(new DateTime(2015, 2, 24)));
Assert.Equal(new DateTime(2015, 8, 24), yearly.Next(new DateTime(2015, 3, 24)));
Assert.Equal(new DateTime(2015, 8, 24), yearly.Next(new DateTime(2015, 4, 24)));
Assert.Equal(new DateTime(2015, 8, 24), yearly.Next(new DateTime(2015, 5, 24)));
Assert.Equal(new DateTime(2015, 8, 24), yearly.Next(new DateTime(2015, 6, 24)));
Assert.Equal(new DateTime(2015, 8, 24), yearly.Next(new DateTime(2015, 7, 24)));
Assert.Equal(new DateTime(2016, 1, 24), yearly.Next(new DateTime(2015, 8, 24)));
Assert.Equal(new DateTime(2016, 2, 24), yearly.Next(new DateTime(2016, 1, 24)));
Assert.Null(yearly.Next(new DateTime(2020, 1, 1)));
}
public void Yearly_EveryYear_TwoMonthsAfterDateTime()
{
// Arrange.
var startDate = new DateTime(2015, 1, 1);
IRecurring yearly = Recurs
.Starting(startDate)
.Every(1)
.Years()
.OnDay(24)
.OnMonth(startDate.AddMonths(2))
.Ending(new DateTime(2020, 1, 1))
.Build();
// Act.
// Assert.
Assert.Equal(new DateTime(2015, 3, 24), yearly.Next(new DateTime(2014, 1, 1)));
Assert.Equal(new DateTime(2015, 3, 24), yearly.Next(new DateTime(2015, 1, 1)));
Assert.Equal(new DateTime(2015, 3, 24), yearly.Next(new DateTime(2015, 1, 23)));
Assert.Equal(new DateTime(2016, 3, 24), yearly.Next(new DateTime(2015, 3, 24)));
Assert.Equal(new DateTime(2016, 3, 24), yearly.Next(new DateTime(2015, 3, 25)));
Assert.Equal(new DateTime(2016, 3, 24), yearly.Next(new DateTime(2015, 10, 1)));
Assert.Equal(new DateTime(2016, 3, 24), yearly.Next(new DateTime(2015, 10, 23)));
Assert.Equal(new DateTime(2016, 3, 24), yearly.Next(new DateTime(2015, 10, 24)));
Assert.Equal(new DateTime(2017, 3, 24), yearly.Next(new DateTime(2016, 3, 24)));
Assert.Equal(new DateTime(2017, 3, 24), yearly.Next(new DateTime(2016, 4, 24)));
Assert.Null(yearly.Next(new DateTime(2020, 1, 1)));
}