1use std::error::Error as StdError;
2use std::fmt;
3use std::str;
4use std::time::{SystemTime, Duration, UNIX_EPOCH};
5
6#[cfg(target_os="cloudabi")]
7mod max {
8 pub const SECONDS: u64 = ::std::u64::MAX / 1_000_000_000;
9 #[allow(unused)]
10 pub const TIMESTAMP: &'static str = "2554-07-21T23:34:33Z";
11}
12#[cfg(all(
13 target_pointer_width="32",
14 not(target_os="cloudabi"),
15 not(target_os="windows"),
16 not(all(target_arch="wasm32", not(target_os="emscripten")))
17))]
18mod max {
19 pub const SECONDS: u64 = ::std::i32::MAX as u64;
20 #[allow(unused)]
21 pub const TIMESTAMP: &'static str = "2038-01-19T03:14:07Z";
22}
23
24#[cfg(any(
25 target_pointer_width="64",
26 target_os="windows",
27 all(target_arch="wasm32", not(target_os="emscripten")),
28))]
29mod max {
30 pub const SECONDS: u64 = 253_402_300_800-1; // last second of year 9999
31 #[allow(unused)]
32 pub const TIMESTAMP: &str = "9999-12-31T23:59:59Z";
33}
34
35/// Error parsing datetime (timestamp)
36#[derive(Debug, PartialEq, Clone, Copy)]
37pub enum Error {
38 /// Numeric component is out of range
39 OutOfRange,
40 /// Bad character where digit is expected
41 InvalidDigit,
42 /// Other formatting errors
43 InvalidFormat,
44}
45
46impl StdError for Error {}
47
48impl fmt::Display for Error {
49 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
50 match self {
51 Error::OutOfRange => write!(f, "numeric component is out of range"),
52 Error::InvalidDigit => write!(f, "bad character where digit is expected"),
53 Error::InvalidFormat => write!(f, "timestamp format is invalid"),
54 }
55 }
56}
57
58#[derive(Debug, Clone, PartialEq, Eq)]
59enum Precision {
60 Smart,
61 Seconds,
62 Millis,
63 Micros,
64 Nanos,
65}
66
67/// A wrapper type that allows you to Display a SystemTime
68#[derive(Debug, Clone)]
69pub struct Rfc3339Timestamp(SystemTime, Precision);
70
71#[inline]
72fn two_digits(b1: u8, b2: u8) -> Result<u64, Error> {
73 if b1 < b'0' || b2 < b'0' || b1 > b'9' || b2 > b'9' {
74 return Err(Error::InvalidDigit);
75 }
76 Ok(((b1 - b'0')*10 + (b2 - b'0')) as u64)
77}
78
79/// Parse RFC3339 timestamp `2018-02-14T00:28:07Z`
80///
81/// Supported feature: any precision of fractional
82/// digits `2018-02-14T00:28:07.133Z`.
83///
84/// Unsupported feature: localized timestamps. Only UTC is supported.
85pub fn parse_rfc3339(s: &str) -> Result<SystemTime, Error> {
86 if s.len() < "2018-02-14T00:28:07Z".len() {
87 return Err(Error::InvalidFormat);
88 }
89 let b: &[u8] = s.as_bytes();
90 if b[10] != b'T' || b[b.len()-1] != b'Z' {
91 return Err(Error::InvalidFormat);
92 }
93 parse_rfc3339_weak(s)
94}
95
96/// Parse RFC3339-like timestamp `2018-02-14 00:28:07`
97///
98/// Supported features:
99///
100/// 1. Any precision of fractional digits `2018-02-14 00:28:07.133`.
101/// 2. Supports timestamp with or without either of `T` or `Z`
102/// 3. Anything valid for `parse_3339` is valid for this function
103///
104/// Unsupported feature: localized timestamps. Only UTC is supported, even if
105/// `Z` is not specified.
106///
107/// This function is intended to use for parsing human input. Whereas
108/// `parse_rfc3339` is for strings generated programmatically.
109pub fn parse_rfc3339_weak(s: &str) -> Result<SystemTime, Error> {
110 if s.len() < "2018-02-14T00:28:07".len() {
111 return Err(Error::InvalidFormat);
112 }
113 let b = s.as_bytes(); // for careless slicing
114 if b[4] != b'-' || b[7] != b'-' || (b[10] != b'T' && b[10] != b' ') ||
115 b[13] != b':' || b[16] != b':'
116 {
117 return Err(Error::InvalidFormat);
118 }
119 let year = two_digits(b[0], b[1])? * 100 + two_digits(b[2], b[3])?;
120 let month = two_digits(b[5], b[6])?;
121 let day = two_digits(b[8], b[9])?;
122 let hour = two_digits(b[11], b[12])?;
123 let minute = two_digits(b[14], b[15])?;
124 let mut second = two_digits(b[17], b[18])?;
125
126 if year < 1970 || hour > 23 || minute > 59 || second > 60 {
127 return Err(Error::OutOfRange);
128 }
129 // TODO(tailhook) should we check that leaps second is only on midnight ?
130 if second == 60 {
131 second = 59
132 };
133 let leap_years = ((year - 1) - 1968) / 4 - ((year - 1) - 1900) / 100 +
134 ((year - 1) - 1600) / 400;
135 let leap = is_leap_year(year);
136 let (mut ydays, mdays) = match month {
137 1 => (0, 31),
138 2 if leap => (31, 29),
139 2 => (31, 28),
140 3 => (59, 31),
141 4 => (90, 30),
142 5 => (120, 31),
143 6 => (151, 30),
144 7 => (181, 31),
145 8 => (212, 31),
146 9 => (243, 30),
147 10 => (273, 31),
148 11 => (304, 30),
149 12 => (334, 31),
150 _ => return Err(Error::OutOfRange),
151 };
152 if day > mdays || day == 0 {
153 return Err(Error::OutOfRange);
154 }
155 ydays += day - 1;
156 if leap && month > 2 {
157 ydays += 1;
158 }
159 let days = (year - 1970) * 365 + leap_years + ydays;
160
161 let time = second + minute * 60 + hour * 3600;
162
163 let mut nanos = 0;
164 let mut mult = 100_000_000;
165 if b.get(19) == Some(&b'.') {
166 for idx in 20..b.len() {
167 if b[idx] == b'Z' {
168 if idx == b.len()-1 {
169 break;
170 } else {
171 return Err(Error::InvalidDigit);
172 }
173 }
174 if b[idx] < b'0' || b[idx] > b'9' {
175 return Err(Error::InvalidDigit);
176 }
177 nanos += mult * (b[idx] - b'0') as u32;
178 mult /= 10;
179 }
180 } else if b.len() != 19 && (b.len() > 20 || b[19] != b'Z') {
181 return Err(Error::InvalidFormat);
182 }
183
184 let total_seconds = time + days * 86400;
185 if total_seconds > max::SECONDS {
186 return Err(Error::OutOfRange);
187 }
188
189 Ok(UNIX_EPOCH + Duration::new(total_seconds, nanos))
190}
191
192fn is_leap_year(y: u64) -> bool {
193 y % 4 == 0 && (y % 100 != 0 || y % 400 == 0)
194}
195
196/// Format an RFC3339 timestamp `2018-02-14T00:28:07Z`
197///
198/// This function formats timestamp with smart precision: i.e. if it has no
199/// fractional seconds, they aren't written at all. And up to nine digits if
200/// they are.
201///
202/// The value is always UTC and ignores system timezone.
203pub fn format_rfc3339(system_time: SystemTime) -> Rfc3339Timestamp {
204 Rfc3339Timestamp(system_time, Precision::Smart)
205}
206
207/// Format an RFC3339 timestamp `2018-02-14T00:28:07Z`
208///
209/// This format always shows timestamp without fractional seconds.
210///
211/// The value is always UTC and ignores system timezone.
212pub fn format_rfc3339_seconds(system_time: SystemTime) -> Rfc3339Timestamp {
213 Rfc3339Timestamp(system_time, Precision::Seconds)
214}
215
216/// Format an RFC3339 timestamp `2018-02-14T00:28:07.000Z`
217///
218/// This format always shows milliseconds even if millisecond value is zero.
219///
220/// The value is always UTC and ignores system timezone.
221pub fn format_rfc3339_millis(system_time: SystemTime) -> Rfc3339Timestamp {
222 Rfc3339Timestamp(system_time, Precision::Millis)
223}
224
225/// Format an RFC3339 timestamp `2018-02-14T00:28:07.000000Z`
226///
227/// This format always shows microseconds even if microsecond value is zero.
228///
229/// The value is always UTC and ignores system timezone.
230pub fn format_rfc3339_micros(system_time: SystemTime) -> Rfc3339Timestamp {
231 Rfc3339Timestamp(system_time, Precision::Micros)
232}
233
234/// Format an RFC3339 timestamp `2018-02-14T00:28:07.000000000Z`
235///
236/// This format always shows nanoseconds even if nanosecond value is zero.
237///
238/// The value is always UTC and ignores system timezone.
239pub fn format_rfc3339_nanos(system_time: SystemTime) -> Rfc3339Timestamp {
240 Rfc3339Timestamp(system_time, Precision::Nanos)
241}
242
243impl Rfc3339Timestamp {
244 /// Returns a reference to the [`SystemTime`][] that is being formatted.
245 pub fn get_ref(&self) -> &SystemTime {
246 &self.0
247 }
248}
249
250impl fmt::Display for Rfc3339Timestamp {
251 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
252 use self::Precision::*;
253
254 let dur = self.0.duration_since(UNIX_EPOCH)
255 .expect("all times should be after the epoch");
256 let secs_since_epoch = dur.as_secs();
257 let nanos = dur.subsec_nanos();
258
259 if secs_since_epoch >= 253_402_300_800 { // year 9999
260 return Err(fmt::Error);
261 }
262
263 /* 2000-03-01 (mod 400 year, immediately after feb29 */
264 const LEAPOCH: i64 = 11017;
265 const DAYS_PER_400Y: i64 = 365*400 + 97;
266 const DAYS_PER_100Y: i64 = 365*100 + 24;
267 const DAYS_PER_4Y: i64 = 365*4 + 1;
268
269 let days = (secs_since_epoch / 86400) as i64 - LEAPOCH;
270 let secs_of_day = secs_since_epoch % 86400;
271
272 let mut qc_cycles = days / DAYS_PER_400Y;
273 let mut remdays = days % DAYS_PER_400Y;
274
275 if remdays < 0 {
276 remdays += DAYS_PER_400Y;
277 qc_cycles -= 1;
278 }
279
280 let mut c_cycles = remdays / DAYS_PER_100Y;
281 if c_cycles == 4 { c_cycles -= 1; }
282 remdays -= c_cycles * DAYS_PER_100Y;
283
284 let mut q_cycles = remdays / DAYS_PER_4Y;
285 if q_cycles == 25 { q_cycles -= 1; }
286 remdays -= q_cycles * DAYS_PER_4Y;
287
288 let mut remyears = remdays / 365;
289 if remyears == 4 { remyears -= 1; }
290 remdays -= remyears * 365;
291
292 let mut year = 2000 +
293 remyears + 4*q_cycles + 100*c_cycles + 400*qc_cycles;
294
295 let months = [31,30,31,30,31,31,30,31,30,31,31,29];
296 let mut mon = 0;
297 for mon_len in months.iter() {
298 mon += 1;
299 if remdays < *mon_len {
300 break;
301 }
302 remdays -= *mon_len;
303 }
304 let mday = remdays+1;
305 let mon = if mon + 2 > 12 {
306 year += 1;
307 mon - 10
308 } else {
309 mon + 2
310 };
311
312 let mut buf: [u8; 30] = [
313 // Too long to write as: b"0000-00-00T00:00:00.000000000Z"
314 b'0', b'0', b'0', b'0', b'-', b'0', b'0', b'-', b'0', b'0', b'T',
315 b'0', b'0', b':', b'0', b'0', b':', b'0', b'0',
316 b'.', b'0', b'0', b'0', b'0', b'0', b'0', b'0', b'0', b'0', b'Z',
317 ];
318 buf[0] = b'0' + (year / 1000) as u8;
319 buf[1] = b'0' + (year / 100 % 10) as u8;
320 buf[2] = b'0' + (year / 10 % 10) as u8;
321 buf[3] = b'0' + (year % 10) as u8;
322 buf[5] = b'0' + (mon / 10) as u8;
323 buf[6] = b'0' + (mon % 10) as u8;
324 buf[8] = b'0' + (mday / 10) as u8;
325 buf[9] = b'0' + (mday % 10) as u8;
326 buf[11] = b'0' + (secs_of_day / 3600 / 10) as u8;
327 buf[12] = b'0' + (secs_of_day / 3600 % 10) as u8;
328 buf[14] = b'0' + (secs_of_day / 60 / 10 % 6) as u8;
329 buf[15] = b'0' + (secs_of_day / 60 % 10) as u8;
330 buf[17] = b'0' + (secs_of_day / 10 % 6) as u8;
331 buf[18] = b'0' + (secs_of_day % 10) as u8;
332
333 let offset = if self.1 == Seconds || nanos == 0 && self.1 == Smart {
334 buf[19] = b'Z';
335 19
336 } else if self.1 == Millis {
337 buf[20] = b'0' + (nanos / 100_000_000) as u8;
338 buf[21] = b'0' + (nanos / 10_000_000 % 10) as u8;
339 buf[22] = b'0' + (nanos / 1_000_000 % 10) as u8;
340 buf[23] = b'Z';
341 23
342 } else if self.1 == Micros {
343 buf[20] = b'0' + (nanos / 100_000_000) as u8;
344 buf[21] = b'0' + (nanos / 10_000_000 % 10) as u8;
345 buf[22] = b'0' + (nanos / 1_000_000 % 10) as u8;
346 buf[23] = b'0' + (nanos / 100_000 % 10) as u8;
347 buf[24] = b'0' + (nanos / 10_000 % 10) as u8;
348 buf[25] = b'0' + (nanos / 1_000 % 10) as u8;
349 buf[26] = b'Z';
350 26
351 } else {
352 buf[20] = b'0' + (nanos / 100_000_000) as u8;
353 buf[21] = b'0' + (nanos / 10_000_000 % 10) as u8;
354 buf[22] = b'0' + (nanos / 1_000_000 % 10) as u8;
355 buf[23] = b'0' + (nanos / 100_000 % 10) as u8;
356 buf[24] = b'0' + (nanos / 10_000 % 10) as u8;
357 buf[25] = b'0' + (nanos / 1_000 % 10) as u8;
358 buf[26] = b'0' + (nanos / 100 % 10) as u8;
359 buf[27] = b'0' + (nanos / 10 % 10) as u8;
360 buf[28] = b'0' + (nanos / 1 % 10) as u8;
361 // 29th is 'Z'
362 29
363 };
364
365 // we know our chars are all ascii
366 f.write_str(str::from_utf8(&buf[..=offset]).expect("Conversion to utf8 failed"))
367 }
368}
369
370#[cfg(test)]
371mod test {
372 use std::str::from_utf8;
373 use std::time::{UNIX_EPOCH, SystemTime, Duration};
374
375 use rand::Rng;
376
377 use super::{parse_rfc3339, parse_rfc3339_weak, format_rfc3339};
378 use super::{format_rfc3339_millis, format_rfc3339_micros};
379 use super::{format_rfc3339_nanos};
380 use super::max;
381
382 fn from_sec(sec: u64) -> (String, SystemTime) {
383 let s = time::at_utc(time::Timespec { sec: sec as i64, nsec: 0 })
384 .rfc3339().to_string();
385 let time = UNIX_EPOCH + Duration::new(sec, 0);
386 (s, time)
387 }
388
389 #[test]
390 #[cfg(all(target_pointer_width="32", target_os="linux"))]
391 fn year_after_2038_fails_gracefully() {
392 // next second
393 assert_eq!(parse_rfc3339("2038-01-19T03:14:08Z").unwrap_err(),
394 super::Error::OutOfRange);
395 assert_eq!(parse_rfc3339("9999-12-31T23:59:59Z").unwrap_err(),
396 super::Error::OutOfRange);
397 }
398
399 #[test]
400 fn smoke_tests_parse() {
401 assert_eq!(parse_rfc3339("1970-01-01T00:00:00Z").unwrap(),
402 UNIX_EPOCH + Duration::new(0, 0));
403 assert_eq!(parse_rfc3339("1970-01-01T00:00:01Z").unwrap(),
404 UNIX_EPOCH + Duration::new(1, 0));
405 assert_eq!(parse_rfc3339("2018-02-13T23:08:32Z").unwrap(),
406 UNIX_EPOCH + Duration::new(1_518_563_312, 0));
407 assert_eq!(parse_rfc3339("2012-01-01T00:00:00Z").unwrap(),
408 UNIX_EPOCH + Duration::new(1_325_376_000, 0));
409 }
410
411 #[test]
412 fn smoke_tests_format() {
413 assert_eq!(
414 format_rfc3339(UNIX_EPOCH + Duration::new(0, 0)).to_string(),
415 "1970-01-01T00:00:00Z");
416 assert_eq!(
417 format_rfc3339(UNIX_EPOCH + Duration::new(1, 0)).to_string(),
418 "1970-01-01T00:00:01Z");
419 assert_eq!(
420 format_rfc3339(UNIX_EPOCH + Duration::new(1_518_563_312, 0)).to_string(),
421 "2018-02-13T23:08:32Z");
422 assert_eq!(
423 format_rfc3339(UNIX_EPOCH + Duration::new(1_325_376_000, 0)).to_string(),
424 "2012-01-01T00:00:00Z");
425 }
426
427 #[test]
428 fn smoke_tests_format_millis() {
429 assert_eq!(
430 format_rfc3339_millis(UNIX_EPOCH +
431 Duration::new(0, 0)).to_string(),
432 "1970-01-01T00:00:00.000Z");
433 assert_eq!(
434 format_rfc3339_millis(UNIX_EPOCH +
435 Duration::new(1_518_563_312, 123_000_000)).to_string(),
436 "2018-02-13T23:08:32.123Z");
437 }
438
439 #[test]
440 fn smoke_tests_format_micros() {
441 assert_eq!(
442 format_rfc3339_micros(UNIX_EPOCH +
443 Duration::new(0, 0)).to_string(),
444 "1970-01-01T00:00:00.000000Z");
445 assert_eq!(
446 format_rfc3339_micros(UNIX_EPOCH +
447 Duration::new(1_518_563_312, 123_000_000)).to_string(),
448 "2018-02-13T23:08:32.123000Z");
449 assert_eq!(
450 format_rfc3339_micros(UNIX_EPOCH +
451 Duration::new(1_518_563_312, 456_123_000)).to_string(),
452 "2018-02-13T23:08:32.456123Z");
453 }
454
455 #[test]
456 fn smoke_tests_format_nanos() {
457 assert_eq!(
458 format_rfc3339_nanos(UNIX_EPOCH +
459 Duration::new(0, 0)).to_string(),
460 "1970-01-01T00:00:00.000000000Z");
461 assert_eq!(
462 format_rfc3339_nanos(UNIX_EPOCH +
463 Duration::new(1_518_563_312, 123_000_000)).to_string(),
464 "2018-02-13T23:08:32.123000000Z");
465 assert_eq!(
466 format_rfc3339_nanos(UNIX_EPOCH +
467 Duration::new(1_518_563_312, 789_456_123)).to_string(),
468 "2018-02-13T23:08:32.789456123Z");
469 }
470
471 #[test]
472 fn upper_bound() {
473 let max = UNIX_EPOCH + Duration::new(max::SECONDS, 0);
474 assert_eq!(parse_rfc3339(&max::TIMESTAMP).unwrap(), max);
475 assert_eq!(format_rfc3339(max).to_string(), max::TIMESTAMP);
476 }
477
478 #[test]
479 fn leap_second() {
480 assert_eq!(parse_rfc3339("2016-12-31T23:59:60Z").unwrap(),
481 UNIX_EPOCH + Duration::new(1_483_228_799, 0));
482 }
483
484 #[test]
485 fn first_731_days() {
486 let year_start = 0; // 1970
487 for day in 0..= 365 * 2 { // scan leap year and non-leap year
488 let (s, time) = from_sec(year_start + day * 86400);
489 assert_eq!(parse_rfc3339(&s).unwrap(), time);
490 assert_eq!(format_rfc3339(time).to_string(), s);
491 }
492 }
493
494 #[test]
495 fn the_731_consecutive_days() {
496 let year_start = 1_325_376_000; // 2012
497 for day in 0..= 365 * 2 { // scan leap year and non-leap year
498 let (s, time) = from_sec(year_start + day * 86400);
499 assert_eq!(parse_rfc3339(&s).unwrap(), time);
500 assert_eq!(format_rfc3339(time).to_string(), s);
501 }
502 }
503
504 #[test]
505 fn all_86400_seconds() {
506 let day_start = 1_325_376_000;
507 for second in 0..86400 { // scan leap year and non-leap year
508 let (s, time) = from_sec(day_start + second);
509 assert_eq!(parse_rfc3339(&s).unwrap(), time);
510 assert_eq!(format_rfc3339(time).to_string(), s);
511 }
512 }
513
514 #[test]
515 fn random_past() {
516 let upper = SystemTime::now().duration_since(UNIX_EPOCH).unwrap()
517 .as_secs();
518 for _ in 0..10000 {
519 let sec = rand::thread_rng().gen_range(0, upper);
520 let (s, time) = from_sec(sec);
521 assert_eq!(parse_rfc3339(&s).unwrap(), time);
522 assert_eq!(format_rfc3339(time).to_string(), s);
523 }
524 }
525
526 #[test]
527 fn random_wide_range() {
528 for _ in 0..100_000 {
529 let sec = rand::thread_rng().gen_range(0, max::SECONDS);
530 let (s, time) = from_sec(sec);
531 assert_eq!(parse_rfc3339(&s).unwrap(), time);
532 assert_eq!(format_rfc3339(time).to_string(), s);
533 }
534 }
535
536 #[test]
537 fn milliseconds() {
538 assert_eq!(parse_rfc3339("1970-01-01T00:00:00.123Z").unwrap(),
539 UNIX_EPOCH + Duration::new(0, 123_000_000));
540 assert_eq!(format_rfc3339(UNIX_EPOCH + Duration::new(0, 123_000_000))
541 .to_string(), "1970-01-01T00:00:00.123000000Z");
542 }
543
544 #[test]
545 #[should_panic(expected="OutOfRange")]
546 fn zero_month() {
547 parse_rfc3339("1970-00-01T00:00:00Z").unwrap();
548 }
549
550 #[test]
551 #[should_panic(expected="OutOfRange")]
552 fn big_month() {
553 parse_rfc3339("1970-32-01T00:00:00Z").unwrap();
554 }
555
556 #[test]
557 #[should_panic(expected="OutOfRange")]
558 fn zero_day() {
559 parse_rfc3339("1970-01-00T00:00:00Z").unwrap();
560 }
561
562 #[test]
563 #[should_panic(expected="OutOfRange")]
564 fn big_day() {
565 parse_rfc3339("1970-12-35T00:00:00Z").unwrap();
566 }
567
568 #[test]
569 #[should_panic(expected="OutOfRange")]
570 fn big_day2() {
571 parse_rfc3339("1970-02-30T00:00:00Z").unwrap();
572 }
573
574 #[test]
575 #[should_panic(expected="OutOfRange")]
576 fn big_second() {
577 parse_rfc3339("1970-12-30T00:00:78Z").unwrap();
578 }
579
580 #[test]
581 #[should_panic(expected="OutOfRange")]
582 fn big_minute() {
583 parse_rfc3339("1970-12-30T00:78:00Z").unwrap();
584 }
585
586 #[test]
587 #[should_panic(expected="OutOfRange")]
588 fn big_hour() {
589 parse_rfc3339("1970-12-30T24:00:00Z").unwrap();
590 }
591
592 #[test]
593 fn break_data() {
594 for pos in 0.."2016-12-31T23:59:60Z".len() {
595 let mut s = b"2016-12-31T23:59:60Z".to_vec();
596 s[pos] = b'x';
597 parse_rfc3339(from_utf8(&s).unwrap()).unwrap_err();
598 }
599 }
600
601 #[test]
602 fn weak_smoke_tests() {
603 assert_eq!(parse_rfc3339_weak("1970-01-01 00:00:00").unwrap(),
604 UNIX_EPOCH + Duration::new(0, 0));
605 parse_rfc3339("1970-01-01 00:00:00").unwrap_err();
606
607 assert_eq!(parse_rfc3339_weak("1970-01-01 00:00:00.000123").unwrap(),
608 UNIX_EPOCH + Duration::new(0, 123_000));
609 parse_rfc3339("1970-01-01 00:00:00.000123").unwrap_err();
610
611 assert_eq!(parse_rfc3339_weak("1970-01-01T00:00:00.000123").unwrap(),
612 UNIX_EPOCH + Duration::new(0, 123_000));
613 parse_rfc3339("1970-01-01T00:00:00.000123").unwrap_err();
614
615 assert_eq!(parse_rfc3339_weak("1970-01-01 00:00:00.000123Z").unwrap(),
616 UNIX_EPOCH + Duration::new(0, 123_000));
617 parse_rfc3339("1970-01-01 00:00:00.000123Z").unwrap_err();
618
619 assert_eq!(parse_rfc3339_weak("1970-01-01 00:00:00Z").unwrap(),
620 UNIX_EPOCH + Duration::new(0, 0));
621 parse_rfc3339("1970-01-01 00:00:00Z").unwrap_err();
622 }
623}
624