279         assert_eq!(dt.round_subsecs(10), dt);  in test_round_subsecs()
280         assert_eq!(dt.round_subsecs(9), dt);  in test_round_subsecs()
281         assert_eq!(dt.round_subsecs(8).nanosecond(), 084_660_680);  in test_round_subsecs()
282         assert_eq!(dt.round_subsecs(7).nanosecond(), 084_660_700);  in test_round_subsecs()
283         assert_eq!(dt.round_subsecs(6).nanosecond(), 084_661_000);  in test_round_subsecs()
284         assert_eq!(dt.round_subsecs(5).nanosecond(), 084_660_000);  in test_round_subsecs()
285         assert_eq!(dt.round_subsecs(4).nanosecond(), 084_700_000);  in test_round_subsecs()
286         assert_eq!(dt.round_subsecs(3).nanosecond(), 085_000_000);  in test_round_subsecs()
287         assert_eq!(dt.round_subsecs(2).nanosecond(), 080_000_000);  in test_round_subsecs()
288         assert_eq!(dt.round_subsecs(1).nanosecond(), 100_000_000);  in test_round_subsecs()
290         assert_eq!(dt.round_subsecs(0).nanosecond(), 0);  in test_round_subsecs()
291         assert_eq!(dt.round_subsecs(0).second(), 13);  in test_round_subsecs()
294         assert_eq!(dt.round_subsecs(9), dt);  in test_round_subsecs()
295         assert_eq!(dt.round_subsecs(4), dt);  in test_round_subsecs()
296         assert_eq!(dt.round_subsecs(3).nanosecond(), 751_000_000);  in test_round_subsecs()
297         assert_eq!(dt.round_subsecs(2).nanosecond(), 750_000_000);  in test_round_subsecs()
298         assert_eq!(dt.round_subsecs(1).nanosecond(), 800_000_000);  in test_round_subsecs()
300         assert_eq!(dt.round_subsecs(0).nanosecond(), 0);  in test_round_subsecs()
301         assert_eq!(dt.round_subsecs(0).second(), 28);  in test_round_subsecs()
307         assert_eq!(dt.round_subsecs(9), dt);  in test_round_leap_nanos()
308         assert_eq!(dt.round_subsecs(4), dt);  in test_round_leap_nanos()
309         assert_eq!(dt.round_subsecs(2).nanosecond(), 1_750_000_000);  in test_round_leap_nanos()
310         assert_eq!(dt.round_subsecs(1).nanosecond(), 1_800_000_000);  in test_round_leap_nanos()
311         assert_eq!(dt.round_subsecs(1).second(), 59);  in test_round_leap_nanos()
313         assert_eq!(dt.round_subsecs(0).nanosecond(), 0);  in test_round_leap_nanos()
314         assert_eq!(dt.round_subsecs(0).second(), 0);  in test_round_leap_nanos()
322         assert_eq!(dt.trunc_subsecs(10), dt);  in test_trunc_subsecs()
323         assert_eq!(dt.trunc_subsecs(9), dt);  in test_trunc_subsecs()
324         assert_eq!(dt.trunc_subsecs(8).nanosecond(), 084_660_680);  in test_trunc_subsecs()
325         assert_eq!(dt.trunc_subsecs(7).nanosecond(), 084_660_600);  in test_trunc_subsecs()
326         assert_eq!(dt.trunc_subsecs(6).nanosecond(), 084_660_000);  in test_trunc_subsecs()
327         assert_eq!(dt.trunc_subsecs(5).nanosecond(), 084_660_000);  in test_trunc_subsecs()
328         assert_eq!(dt.trunc_subsecs(4).nanosecond(), 084_600_000);  in test_trunc_subsecs()
329         assert_eq!(dt.trunc_subsecs(3).nanosecond(), 084_000_000);  in test_trunc_subsecs()
330         assert_eq!(dt.trunc_subsecs(2).nanosecond(), 080_000_000);  in test_trunc_subsecs()
331         assert_eq!(dt.trunc_subsecs(1).nanosecond(), 0);  in test_trunc_subsecs()
333         assert_eq!(dt.trunc_subsecs(0).nanosecond(), 0);  in test_trunc_subsecs()
334         assert_eq!(dt.trunc_subsecs(0).second(), 13);  in test_trunc_subsecs()
337         assert_eq!(dt.trunc_subsecs(9), dt);  in test_trunc_subsecs()
338         assert_eq!(dt.trunc_subsecs(4), dt);  in test_trunc_subsecs()
339         assert_eq!(dt.trunc_subsecs(3).nanosecond(), 750_000_000);  in test_trunc_subsecs()
340         assert_eq!(dt.trunc_subsecs(2).nanosecond(), 750_000_000);  in test_trunc_subsecs()
341         assert_eq!(dt.trunc_subsecs(1).nanosecond(), 700_000_000);  in test_trunc_subsecs()
343         assert_eq!(dt.trunc_subsecs(0).nanosecond(), 0);  in test_trunc_subsecs()
344         assert_eq!(dt.trunc_subsecs(0).second(), 27);  in test_trunc_subsecs()
350         assert_eq!(dt.trunc_subsecs(9), dt);  in test_trunc_leap_nanos()
351         assert_eq!(dt.trunc_subsecs(4), dt);  in test_trunc_leap_nanos()
352         assert_eq!(dt.trunc_subsecs(2).nanosecond(), 1_750_000_000);  in test_trunc_leap_nanos()
353         assert_eq!(dt.trunc_subsecs(1).nanosecond(), 1_700_000_000);  in test_trunc_leap_nanos()
354         assert_eq!(dt.trunc_subsecs(1).second(), 59);  in test_trunc_leap_nanos()
356         assert_eq!(dt.trunc_subsecs(0).nanosecond(), 1_000_000_000);  in test_trunc_leap_nanos()
357         assert_eq!(dt.trunc_subsecs(0).second(), 59);  in test_trunc_leap_nanos()
364         assert_eq!(  in test_duration_round()
371         assert_eq!(  in test_duration_round()
377         assert_eq!(  in test_duration_round()
382         assert_eq!(  in test_duration_round()
386         assert_eq!(  in test_duration_round()
390         assert_eq!(  in test_duration_round()
394         assert_eq!(  in test_duration_round()
403         assert_eq!(  in test_duration_round_pre_epoch()
413         assert_eq!(  in test_duration_trunc()
420         assert_eq!(  in test_duration_trunc()
426         assert_eq!(  in test_duration_trunc()
430         assert_eq!(  in test_duration_trunc()
434         assert_eq!(  in test_duration_trunc()
438         assert_eq!(  in test_duration_trunc()
442         assert_eq!(  in test_duration_trunc()
451         assert_eq!(  in test_duration_trunc_pre_epoch()