1 use core::time::Duration;
5 assert_ne!(Duration::from_secs(1), Duration::from_secs(0));
6 assert_eq!(Duration::from_secs(1) + Duration::from_secs(2), Duration::from_secs(3));
8 Duration::from_millis(10) + Duration::from_secs(4),
9 Duration::new(4, 10 * 1_000_000)
11 assert_eq!(Duration::from_millis(4000), Duration::new(4, 0));
17 let _ = Duration::new(u64::MAX, 1_000_000_000);
22 assert_eq!(Duration::new(0, 0).as_secs(), 0);
23 assert_eq!(Duration::new(0, 500_000_005).as_secs(), 0);
24 assert_eq!(Duration::new(0, 1_050_000_001).as_secs(), 1);
25 assert_eq!(Duration::from_secs(1).as_secs(), 1);
26 assert_eq!(Duration::from_millis(999).as_secs(), 0);
27 assert_eq!(Duration::from_millis(1001).as_secs(), 1);
28 assert_eq!(Duration::from_micros(999_999).as_secs(), 0);
29 assert_eq!(Duration::from_micros(1_000_001).as_secs(), 1);
30 assert_eq!(Duration::from_nanos(999_999_999).as_secs(), 0);
31 assert_eq!(Duration::from_nanos(1_000_000_001).as_secs(), 1);
36 assert_eq!(Duration::new(0, 0).subsec_millis(), 0);
37 assert_eq!(Duration::new(0, 500_000_005).subsec_millis(), 500);
38 assert_eq!(Duration::new(0, 1_050_000_001).subsec_millis(), 50);
39 assert_eq!(Duration::from_secs(1).subsec_millis(), 0);
40 assert_eq!(Duration::from_millis(999).subsec_millis(), 999);
41 assert_eq!(Duration::from_millis(1001).subsec_millis(), 1);
42 assert_eq!(Duration::from_micros(999_999).subsec_millis(), 999);
43 assert_eq!(Duration::from_micros(1_001_000).subsec_millis(), 1);
44 assert_eq!(Duration::from_nanos(999_999_999).subsec_millis(), 999);
45 assert_eq!(Duration::from_nanos(1_001_000_000).subsec_millis(), 1);
50 assert_eq!(Duration::new(0, 0).subsec_micros(), 0);
51 assert_eq!(Duration::new(0, 500_000_005).subsec_micros(), 500_000);
52 assert_eq!(Duration::new(0, 1_050_000_001).subsec_micros(), 50_000);
53 assert_eq!(Duration::from_secs(1).subsec_micros(), 0);
54 assert_eq!(Duration::from_millis(999).subsec_micros(), 999_000);
55 assert_eq!(Duration::from_millis(1001).subsec_micros(), 1_000);
56 assert_eq!(Duration::from_micros(999_999).subsec_micros(), 999_999);
57 assert_eq!(Duration::from_micros(1_000_001).subsec_micros(), 1);
58 assert_eq!(Duration::from_nanos(999_999_999).subsec_micros(), 999_999);
59 assert_eq!(Duration::from_nanos(1_000_001_000).subsec_micros(), 1);
64 assert_eq!(Duration::new(0, 0).subsec_nanos(), 0);
65 assert_eq!(Duration::new(0, 5).subsec_nanos(), 5);
66 assert_eq!(Duration::new(0, 1_000_000_001).subsec_nanos(), 1);
67 assert_eq!(Duration::from_secs(1).subsec_nanos(), 0);
68 assert_eq!(Duration::from_millis(999).subsec_nanos(), 999_000_000);
69 assert_eq!(Duration::from_millis(1001).subsec_nanos(), 1_000_000);
70 assert_eq!(Duration::from_micros(999_999).subsec_nanos(), 999_999_000);
71 assert_eq!(Duration::from_micros(1_000_001).subsec_nanos(), 1000);
72 assert_eq!(Duration::from_nanos(999_999_999).subsec_nanos(), 999_999_999);
73 assert_eq!(Duration::from_nanos(1_000_000_001).subsec_nanos(), 1);
78 assert_eq!(Duration::new(0, 0) + Duration::new(0, 1), Duration::new(0, 1));
79 assert_eq!(Duration::new(0, 500_000_000) + Duration::new(0, 500_000_001), Duration::new(1, 1));
84 assert_eq!(Duration::new(0, 0).checked_add(Duration::new(0, 1)), Some(Duration::new(0, 1)));
86 Duration::new(0, 500_000_000).checked_add(Duration::new(0, 500_000_001)),
87 Some(Duration::new(1, 1))
89 assert_eq!(Duration::new(1, 0).checked_add(Duration::new(u64::MAX, 0)), None);
94 assert_eq!(Duration::new(0, 0).saturating_add(Duration::new(0, 1)), Duration::new(0, 1));
96 Duration::new(0, 500_000_000).saturating_add(Duration::new(0, 500_000_001)),
99 assert_eq!(Duration::new(1, 0).saturating_add(Duration::new(u64::MAX, 0)), Duration::MAX);
104 assert_eq!(Duration::new(0, 1) - Duration::new(0, 0), Duration::new(0, 1));
105 assert_eq!(Duration::new(0, 500_000_001) - Duration::new(0, 500_000_000), Duration::new(0, 1));
106 assert_eq!(Duration::new(1, 0) - Duration::new(0, 1), Duration::new(0, 999_999_999));
111 assert_eq!(Duration::NANOSECOND.checked_sub(Duration::ZERO), Some(Duration::NANOSECOND));
113 Duration::SECOND.checked_sub(Duration::NANOSECOND),
114 Some(Duration::new(0, 999_999_999))
116 assert_eq!(Duration::ZERO.checked_sub(Duration::NANOSECOND), None);
117 assert_eq!(Duration::ZERO.checked_sub(Duration::SECOND), None);
121 fn saturating_sub() {
122 assert_eq!(Duration::NANOSECOND.saturating_sub(Duration::ZERO), Duration::NANOSECOND);
124 Duration::SECOND.saturating_sub(Duration::NANOSECOND),
125 Duration::new(0, 999_999_999)
127 assert_eq!(Duration::ZERO.saturating_sub(Duration::NANOSECOND), Duration::ZERO);
128 assert_eq!(Duration::ZERO.saturating_sub(Duration::SECOND), Duration::ZERO);
134 let _ = Duration::new(0, 0) - Duration::new(0, 1);
140 let _ = Duration::new(0, 0) - Duration::new(1, 0);
145 assert_eq!(Duration::new(0, 1) * 2, Duration::new(0, 2));
146 assert_eq!(Duration::new(1, 1) * 3, Duration::new(3, 3));
147 assert_eq!(Duration::new(0, 500_000_001) * 4, Duration::new(2, 4));
148 assert_eq!(Duration::new(0, 500_000_001) * 4000, Duration::new(2000, 4000));
153 assert_eq!(Duration::new(0, 1).checked_mul(2), Some(Duration::new(0, 2)));
154 assert_eq!(Duration::new(1, 1).checked_mul(3), Some(Duration::new(3, 3)));
155 assert_eq!(Duration::new(0, 500_000_001).checked_mul(4), Some(Duration::new(2, 4)));
156 assert_eq!(Duration::new(0, 500_000_001).checked_mul(4000), Some(Duration::new(2000, 4000)));
157 assert_eq!(Duration::new(u64::MAX - 1, 0).checked_mul(2), None);
161 fn saturating_mul() {
162 assert_eq!(Duration::new(0, 1).saturating_mul(2), Duration::new(0, 2));
163 assert_eq!(Duration::new(1, 1).saturating_mul(3), Duration::new(3, 3));
164 assert_eq!(Duration::new(0, 500_000_001).saturating_mul(4), Duration::new(2, 4));
165 assert_eq!(Duration::new(0, 500_000_001).saturating_mul(4000), Duration::new(2000, 4000));
166 assert_eq!(Duration::new(u64::MAX - 1, 0).saturating_mul(2), Duration::MAX);
171 assert_eq!(Duration::new(0, 1) / 2, Duration::new(0, 0));
172 assert_eq!(Duration::new(1, 1) / 3, Duration::new(0, 333_333_333));
173 assert_eq!(Duration::new(99, 999_999_000) / 100, Duration::new(0, 999_999_990));
178 assert_eq!(Duration::new(2, 0).checked_div(2), Some(Duration::new(1, 0)));
179 assert_eq!(Duration::new(1, 0).checked_div(2), Some(Duration::new(0, 500_000_000)));
180 assert_eq!(Duration::new(2, 0).checked_div(0), None);
186 Duration::new(1, 999_999_999),
187 Duration::new(2, 999_999_999),
188 Duration::new(0, 999_999_999),
189 Duration::new(0, 999_999_999),
190 Duration::new(0, 999_999_999),
193 let sum = durations.iter().sum::<Duration>();
194 assert_eq!(sum, Duration::new(1 + 2 + 5 + 4, 1_000_000_000 - 5));
198 fn debug_formatting_extreme_values() {
200 format!("{:?}", Duration::new(u64::MAX, 123_456_789)),
201 "18446744073709551615.123456789s"
203 assert_eq!(format!("{:.0?}", Duration::MAX), "18446744073709551616s");
204 assert_eq!(format!("{:.0?}", Duration::new(u64::MAX, 500_000_000)), "18446744073709551616s");
205 assert_eq!(format!("{:.0?}", Duration::new(u64::MAX, 499_999_999)), "18446744073709551615s");
207 format!("{:.3?}", Duration::new(u64::MAX, 999_500_000)),
208 "18446744073709551616.000s"
211 format!("{:.3?}", Duration::new(u64::MAX, 999_499_999)),
212 "18446744073709551615.999s"
215 format!("{:.8?}", Duration::new(u64::MAX, 999_999_995)),
216 "18446744073709551616.00000000s"
219 format!("{:.8?}", Duration::new(u64::MAX, 999_999_994)),
220 "18446744073709551615.99999999s"
222 assert_eq!(format!("{:21.0?}", Duration::MAX), "18446744073709551616s");
223 assert_eq!(format!("{:22.0?}", Duration::MAX), "18446744073709551616s ");
224 assert_eq!(format!("{:24.0?}", Duration::MAX), "18446744073709551616s ");
228 fn debug_formatting_secs() {
229 assert_eq!(format!("{:?}", Duration::new(7, 000_000_000)), "7s");
230 assert_eq!(format!("{:?}", Duration::new(7, 100_000_000)), "7.1s");
231 assert_eq!(format!("{:?}", Duration::new(7, 000_010_000)), "7.00001s");
232 assert_eq!(format!("{:?}", Duration::new(7, 000_000_001)), "7.000000001s");
233 assert_eq!(format!("{:?}", Duration::new(7, 123_456_789)), "7.123456789s");
235 assert_eq!(format!("{:?}", Duration::new(88, 000_000_000)), "88s");
236 assert_eq!(format!("{:?}", Duration::new(88, 100_000_000)), "88.1s");
237 assert_eq!(format!("{:?}", Duration::new(88, 000_010_000)), "88.00001s");
238 assert_eq!(format!("{:?}", Duration::new(88, 000_000_001)), "88.000000001s");
239 assert_eq!(format!("{:?}", Duration::new(88, 123_456_789)), "88.123456789s");
241 assert_eq!(format!("{:?}", Duration::new(999, 000_000_000)), "999s");
242 assert_eq!(format!("{:?}", Duration::new(999, 100_000_000)), "999.1s");
243 assert_eq!(format!("{:?}", Duration::new(999, 000_010_000)), "999.00001s");
244 assert_eq!(format!("{:?}", Duration::new(999, 000_000_001)), "999.000000001s");
245 assert_eq!(format!("{:?}", Duration::new(999, 123_456_789)), "999.123456789s");
249 fn debug_formatting_millis() {
250 assert_eq!(format!("{:?}", Duration::new(0, 7_000_000)), "7ms");
251 assert_eq!(format!("{:?}", Duration::new(0, 7_100_000)), "7.1ms");
252 assert_eq!(format!("{:?}", Duration::new(0, 7_000_001)), "7.000001ms");
253 assert_eq!(format!("{:?}", Duration::new(0, 7_123_456)), "7.123456ms");
255 assert_eq!(format!("{:?}", Duration::new(0, 88_000_000)), "88ms");
256 assert_eq!(format!("{:?}", Duration::new(0, 88_100_000)), "88.1ms");
257 assert_eq!(format!("{:?}", Duration::new(0, 88_000_001)), "88.000001ms");
258 assert_eq!(format!("{:?}", Duration::new(0, 88_123_456)), "88.123456ms");
260 assert_eq!(format!("{:?}", Duration::new(0, 999_000_000)), "999ms");
261 assert_eq!(format!("{:?}", Duration::new(0, 999_100_000)), "999.1ms");
262 assert_eq!(format!("{:?}", Duration::new(0, 999_000_001)), "999.000001ms");
263 assert_eq!(format!("{:?}", Duration::new(0, 999_123_456)), "999.123456ms");
267 fn debug_formatting_micros() {
268 assert_eq!(format!("{:?}", Duration::new(0, 7_000)), "7µs");
269 assert_eq!(format!("{:?}", Duration::new(0, 7_100)), "7.1µs");
270 assert_eq!(format!("{:?}", Duration::new(0, 7_001)), "7.001µs");
271 assert_eq!(format!("{:?}", Duration::new(0, 7_123)), "7.123µs");
273 assert_eq!(format!("{:?}", Duration::new(0, 88_000)), "88µs");
274 assert_eq!(format!("{:?}", Duration::new(0, 88_100)), "88.1µs");
275 assert_eq!(format!("{:?}", Duration::new(0, 88_001)), "88.001µs");
276 assert_eq!(format!("{:?}", Duration::new(0, 88_123)), "88.123µs");
278 assert_eq!(format!("{:?}", Duration::new(0, 999_000)), "999µs");
279 assert_eq!(format!("{:?}", Duration::new(0, 999_100)), "999.1µs");
280 assert_eq!(format!("{:?}", Duration::new(0, 999_001)), "999.001µs");
281 assert_eq!(format!("{:?}", Duration::new(0, 999_123)), "999.123µs");
285 fn debug_formatting_nanos() {
286 assert_eq!(format!("{:?}", Duration::new(0, 0)), "0ns");
287 assert_eq!(format!("{:?}", Duration::new(0, 1)), "1ns");
288 assert_eq!(format!("{:?}", Duration::new(0, 88)), "88ns");
289 assert_eq!(format!("{:?}", Duration::new(0, 999)), "999ns");
293 fn debug_formatting_precision_zero() {
294 assert_eq!(format!("{:.0?}", Duration::new(0, 0)), "0ns");
295 assert_eq!(format!("{:.0?}", Duration::new(0, 123)), "123ns");
297 assert_eq!(format!("{:.0?}", Duration::new(0, 1_001)), "1µs");
298 assert_eq!(format!("{:.0?}", Duration::new(0, 1_499)), "1µs");
299 assert_eq!(format!("{:.0?}", Duration::new(0, 1_500)), "2µs");
300 assert_eq!(format!("{:.0?}", Duration::new(0, 1_999)), "2µs");
302 assert_eq!(format!("{:.0?}", Duration::new(0, 1_000_001)), "1ms");
303 assert_eq!(format!("{:.0?}", Duration::new(0, 1_499_999)), "1ms");
304 assert_eq!(format!("{:.0?}", Duration::new(0, 1_500_000)), "2ms");
305 assert_eq!(format!("{:.0?}", Duration::new(0, 1_999_999)), "2ms");
307 assert_eq!(format!("{:.0?}", Duration::new(1, 000_000_001)), "1s");
308 assert_eq!(format!("{:.0?}", Duration::new(1, 499_999_999)), "1s");
309 assert_eq!(format!("{:.0?}", Duration::new(1, 500_000_000)), "2s");
310 assert_eq!(format!("{:.0?}", Duration::new(1, 999_999_999)), "2s");
314 fn debug_formatting_precision_two() {
315 assert_eq!(format!("{:.2?}", Duration::new(0, 0)), "0.00ns");
316 assert_eq!(format!("{:.2?}", Duration::new(0, 123)), "123.00ns");
318 assert_eq!(format!("{:.2?}", Duration::new(0, 1_000)), "1.00µs");
319 assert_eq!(format!("{:.2?}", Duration::new(0, 7_001)), "7.00µs");
320 assert_eq!(format!("{:.2?}", Duration::new(0, 7_100)), "7.10µs");
321 assert_eq!(format!("{:.2?}", Duration::new(0, 7_109)), "7.11µs");
322 assert_eq!(format!("{:.2?}", Duration::new(0, 7_199)), "7.20µs");
323 assert_eq!(format!("{:.2?}", Duration::new(0, 1_999)), "2.00µs");
325 assert_eq!(format!("{:.2?}", Duration::new(0, 1_000_000)), "1.00ms");
326 assert_eq!(format!("{:.2?}", Duration::new(0, 3_001_000)), "3.00ms");
327 assert_eq!(format!("{:.2?}", Duration::new(0, 3_100_000)), "3.10ms");
328 assert_eq!(format!("{:.2?}", Duration::new(0, 1_999_999)), "2.00ms");
330 assert_eq!(format!("{:.2?}", Duration::new(1, 000_000_000)), "1.00s");
331 assert_eq!(format!("{:.2?}", Duration::new(4, 001_000_000)), "4.00s");
332 assert_eq!(format!("{:.2?}", Duration::new(2, 100_000_000)), "2.10s");
333 assert_eq!(format!("{:.2?}", Duration::new(2, 104_990_000)), "2.10s");
334 assert_eq!(format!("{:.2?}", Duration::new(2, 105_000_000)), "2.11s");
335 assert_eq!(format!("{:.2?}", Duration::new(8, 999_999_999)), "9.00s");
339 fn debug_formatting_padding() {
340 assert_eq!("0ns ", format!("{:<9?}", Duration::new(0, 0)));
341 assert_eq!(" 0ns", format!("{:>9?}", Duration::new(0, 0)));
342 assert_eq!(" 0ns ", format!("{:^9?}", Duration::new(0, 0)));
343 assert_eq!("123ns ", format!("{:<9.0?}", Duration::new(0, 123)));
344 assert_eq!(" 123ns", format!("{:>9.0?}", Duration::new(0, 123)));
345 assert_eq!(" 123ns ", format!("{:^9.0?}", Duration::new(0, 123)));
346 assert_eq!("123.0ns ", format!("{:<9.1?}", Duration::new(0, 123)));
347 assert_eq!(" 123.0ns", format!("{:>9.1?}", Duration::new(0, 123)));
348 assert_eq!(" 123.0ns ", format!("{:^9.1?}", Duration::new(0, 123)));
349 assert_eq!("7.1µs ", format!("{:<9?}", Duration::new(0, 7_100)));
350 assert_eq!(" 7.1µs", format!("{:>9?}", Duration::new(0, 7_100)));
351 assert_eq!(" 7.1µs ", format!("{:^9?}", Duration::new(0, 7_100)));
352 assert_eq!("999.123456ms", format!("{:<9?}", Duration::new(0, 999_123_456)));
353 assert_eq!("999.123456ms", format!("{:>9?}", Duration::new(0, 999_123_456)));
354 assert_eq!("999.123456ms", format!("{:^9?}", Duration::new(0, 999_123_456)));
355 assert_eq!("5s ", format!("{:<9?}", Duration::new(5, 0)));
356 assert_eq!(" 5s", format!("{:>9?}", Duration::new(5, 0)));
357 assert_eq!(" 5s ", format!("{:^9?}", Duration::new(5, 0)));
358 assert_eq!("5.000000000000s", format!("{:<9.12?}", Duration::new(5, 0)));
359 assert_eq!("5.000000000000s", format!("{:>9.12?}", Duration::new(5, 0)));
360 assert_eq!("5.000000000000s", format!("{:^9.12?}", Duration::new(5, 0)));
362 // default alignment is left:
363 assert_eq!("5s ", format!("{:9?}", Duration::new(5, 0)));
367 fn debug_formatting_precision_high() {
368 assert_eq!(format!("{:.5?}", Duration::new(0, 23_678)), "23.67800µs");
370 assert_eq!(format!("{:.9?}", Duration::new(1, 000_000_000)), "1.000000000s");
371 assert_eq!(format!("{:.10?}", Duration::new(4, 001_000_000)), "4.0010000000s");
372 assert_eq!(format!("{:.20?}", Duration::new(4, 001_000_000)), "4.00100000000000000000s");
376 fn duration_const() {
377 // test that the methods of `Duration` are usable in a const context
379 const DURATION: Duration = Duration::new(0, 123_456_789);
381 const SUB_SEC_MILLIS: u32 = DURATION.subsec_millis();
382 assert_eq!(SUB_SEC_MILLIS, 123);
384 const SUB_SEC_MICROS: u32 = DURATION.subsec_micros();
385 assert_eq!(SUB_SEC_MICROS, 123_456);
387 const SUB_SEC_NANOS: u32 = DURATION.subsec_nanos();
388 assert_eq!(SUB_SEC_NANOS, 123_456_789);
390 const IS_ZERO: bool = Duration::ZERO.is_zero();
393 const SECONDS: u64 = Duration::SECOND.as_secs();
394 assert_eq!(SECONDS, 1);
396 const FROM_SECONDS: Duration = Duration::from_secs(1);
397 assert_eq!(FROM_SECONDS, Duration::SECOND);
399 const SECONDS_F32: f32 = Duration::SECOND.as_secs_f32();
400 assert_eq!(SECONDS_F32, 1.0);
402 const FROM_SECONDS_F32: Duration = Duration::from_secs_f32(1.0);
403 assert_eq!(FROM_SECONDS_F32, Duration::SECOND);
405 const SECONDS_F64: f64 = Duration::SECOND.as_secs_f64();
406 assert_eq!(SECONDS_F64, 1.0);
408 const FROM_SECONDS_F64: Duration = Duration::from_secs_f64(1.0);
409 assert_eq!(FROM_SECONDS_F64, Duration::SECOND);
411 const MILLIS: u128 = Duration::SECOND.as_millis();
412 assert_eq!(MILLIS, 1_000);
414 const FROM_MILLIS: Duration = Duration::from_millis(1_000);
415 assert_eq!(FROM_MILLIS, Duration::SECOND);
417 const MICROS: u128 = Duration::SECOND.as_micros();
418 assert_eq!(MICROS, 1_000_000);
420 const FROM_MICROS: Duration = Duration::from_micros(1_000_000);
421 assert_eq!(FROM_MICROS, Duration::SECOND);
423 const NANOS: u128 = Duration::SECOND.as_nanos();
424 assert_eq!(NANOS, 1_000_000_000);
426 const FROM_NANOS: Duration = Duration::from_nanos(1_000_000_000);
427 assert_eq!(FROM_NANOS, Duration::SECOND);
429 const MAX: Duration = Duration::new(u64::MAX, 999_999_999);
431 const CHECKED_ADD: Option<Duration> = MAX.checked_add(Duration::SECOND);
432 assert_eq!(CHECKED_ADD, None);
434 const CHECKED_SUB: Option<Duration> = Duration::ZERO.checked_sub(Duration::SECOND);
435 assert_eq!(CHECKED_SUB, None);
437 const CHECKED_MUL: Option<Duration> = Duration::SECOND.checked_mul(1);
438 assert_eq!(CHECKED_MUL, Some(Duration::SECOND));
440 const MUL_F32: Duration = Duration::SECOND.mul_f32(1.0);
441 assert_eq!(MUL_F32, Duration::SECOND);
443 const MUL_F64: Duration = Duration::SECOND.mul_f64(1.0);
444 assert_eq!(MUL_F64, Duration::SECOND);
446 const CHECKED_DIV: Option<Duration> = Duration::SECOND.checked_div(1);
447 assert_eq!(CHECKED_DIV, Some(Duration::SECOND));
449 const DIV_F32: Duration = Duration::SECOND.div_f32(1.0);
450 assert_eq!(DIV_F32, Duration::SECOND);
452 const DIV_F64: Duration = Duration::SECOND.div_f64(1.0);
453 assert_eq!(DIV_F64, Duration::SECOND);
455 const DIV_DURATION_F32: f32 = Duration::SECOND.div_duration_f32(Duration::SECOND);
456 assert_eq!(DIV_DURATION_F32, 1.0);
458 const DIV_DURATION_F64: f64 = Duration::SECOND.div_duration_f64(Duration::SECOND);
459 assert_eq!(DIV_DURATION_F64, 1.0);
461 const SATURATING_ADD: Duration = MAX.saturating_add(Duration::SECOND);
462 assert_eq!(SATURATING_ADD, MAX);
464 const SATURATING_SUB: Duration = Duration::ZERO.saturating_sub(Duration::SECOND);
465 assert_eq!(SATURATING_SUB, Duration::ZERO);
467 const SATURATING_MUL: Duration = MAX.saturating_mul(2);
468 assert_eq!(SATURATING_MUL, MAX);
473 assert_eq!(Duration::try_from_secs_f32(-0.0), Ok(Duration::ZERO));
474 assert_eq!(Duration::try_from_secs_f64(-0.0), Ok(Duration::ZERO));
475 assert_eq!(Duration::from_secs_f32(-0.0), Duration::ZERO);
476 assert_eq!(Duration::from_secs_f64(-0.0), Duration::ZERO);