compare() func return wrong result comparing using .nanosecond as granularity

[carmelogallo]

As the title, I'm trying the follow code:
date_1.isAfter(NSCalendarUnit.Nanosecond, ofDate: date_2)

between the following dates:
2016-11-18T16:20:12.311Z - 2016-11-18T16:20:12.212Z

I got a false such as result. Any clue?

[malcommac]

Just for completeness that's the code for SwiftDate:

let date1 = try! "2016-11-18T16:20:12.311Z".date(format: .iso8601(options: .withInternetDateTimeExtended))
let date2 = try! "2016-11-18T16:20:12.212Z".date(format: .iso8601(options: .withInternetDateTimeExtended))
let is1After2 = date1.isAfter(date: date2, granularity: .nanosecond) // return false

(lldb) po date.absoluteDate
▿ 2016-11-18 16:20:12 +0000
  - timeIntervalSinceReferenceDate : 501178812.21199989


(lldb) po self.absoluteDate
▿ 2016-11-18 16:20:12 +0000
  - timeIntervalSinceReferenceDate : 501178812.31100011

According to NSDate documentation:
"[NSDate] ... makes possible a wide and fine-grained range of date and time values, giving precision within milliseconds for dates 10,000 years apart [...]"

So I think it's a rounding error (even if comparing two dates using Calendar and nanosecond seems a bit weird).
I've just added a workaround (planned for 4.0.8) you can found here:
7edca03

[carmelogallo]

Cool! Thanks man!

[carmelogallo]

BTW, do you know already the date for 4.0.8?

[malcommac]

If it's all okay I plan to release it later tomorrow (dec. 1)