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test subtracting SystemTime and Instant

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This commit is contained in:
Ralf Jung 2020-03-31 17:50:10 +02:00
parent d1e06b4298
commit 62eaecd2aa
1 changed files with 12 additions and 0 deletions
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12
tests/run-pass/time.rs
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@ -9,10 +9,22 @@ fn main() {
for _ in 0..10 { drop(vec![42]); }
let now2 = SystemTime::now();
assert!(now2 > now1);
let diff = now2.duration_since(now1).unwrap();
assert!(diff.as_micros() > 0);
assert_eq!(now1 + diff, now2);
assert_eq!(now2 - diff, now1);
let now1 = Instant::now();
// Do some work to make time pass.
for _ in 0..10 { drop(vec![42]); }
let now2 = Instant::now();
assert!(now2 > now1);
#[cfg(target_os = "linux")]
{
let diff = now2.duration_since(now1);
assert!(diff.as_micros() > 0);
assert_eq!(now1 + diff, now2);
assert_eq!(now2 - diff, now1);
}
}