public void DatesOnDayInMonthInRange_should_return_a_single_date_if_given_a_small_range()
{
var dateRange = new DateRange(start: new DateTime(2020, 1, 1), end: new DateTime(2020, 1, 5));
var dates = dateRange.DatesOnDayInMonthInRange(5).ToList();
Assert.Single(dates);
dates = dateRange.DatesOnDayInMonthInRange(1).ToList();
Assert.Single(dates);
}
public void DatesOnDayInMonthInRange_should_return_empty_if_given_a_small_date_range_not_containing_the_date()
{
var dateRange = new DateRange(start: new DateTime(2020, 1, 1), end: new DateTime(2020, 1, 5));
var dates = dateRange.DatesOnDayInMonthInRange(31).ToList();
Assert.Empty(dates);
}
public void DatesOnDayInMonthInRange_should_handle_dates_that_dont_exist_in_some_months()
{
var dateRange = new DateRange(start: new DateTime(2020, 1, 10), end: new DateTime(2020, 4, 5));
var dates = dateRange.DatesOnDayInMonthInRange(31).ToList();
Assert.Contains(new DateTime(2020, 1, 31), dates);
Assert.Contains(new DateTime(2020, 3, 31), dates);
Assert.Equal(2, dates.Count);
}
public void DatesOnDayInMonthInRange_should_return_correct_dates()
{
var dateRange = new DateRange(start: new DateTime(2020, 1, 10), end: new DateTime(2020, 4, 5));
var dates = dateRange.DatesOnDayInMonthInRange(1).ToList();
Assert.Contains(new DateTime(2020, 2, 1), dates);
Assert.Contains(new DateTime(2020, 3, 1), dates);
Assert.Contains(new DateTime(2020, 4, 1), dates);
Assert.Equal(3, dates.Count);
}