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add failing test for days_elapsed calculation

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the current code was causing the day to move backwards:

at day 7 hour 23:59, elap is 1
at day 8 hour 0:59, elap is 0
at day 8 hour 1:59, elap is 0
at day 8 hour 2:59, elap is 1
at day 8 hour 3:59, elap is 1
at day 8 hour 4:59, elap is 2

as mentioned in https://github.com/ankitects/anki/pull/416
This commit is contained in:
Damien Elmes 2020-01-07 09:28:09 +10:00
parent 53692567e8
commit 86055bb564
1 changed files with 11 additions and 0 deletions
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11
rslib/src/sched.rs
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@ -154,5 +154,16 @@ mod test {
// to DST, but the number shouldn't change
let offset = mdt.utc_minus_local() / 60;
assert_eq!(elap(crt, now, offset, 4), 507);
// collection created at 3am on the 6th, so day 1 starts at 4am on the 7th, and day 3 on the 9th.
let crt = mdt.ymd(2018, 8, 6).and_hms(3, 0, 0).timestamp();
let mst_offset = mst.utc_minus_local() / 60;
let now = mst.ymd(2018, 8, 9).and_hms(1, 59, 59).timestamp();
assert_eq!(elap(crt, now, mst_offset, 4), 2);
let now = mst.ymd(2018, 8, 9).and_hms(3, 59, 59).timestamp();
assert_eq!(elap(crt, now, mst_offset, 4), 2);
let now = mst.ymd(2018, 8, 9).and_hms(4, 0, 0).timestamp();
assert_eq!(elap(crt, now, mst_offset, 4), 3);
}
}