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make the repair_backoff test more robust (#1095)

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* more the repair_backoff test more robust

* fix names and magic numbers
This commit is contained in:
anatoly yakovenko
2018-08-31 12:40:56 -10:00
committed by GitHub
parent 25d7dc7b96
commit fb4b33b81b
1 changed files with 23 additions and 16 deletions
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39
src/window.rs
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@ -1056,23 +1056,30 @@ mod test {
} }
#[test] #[test]
pub fn test_repair_backoff() { pub fn test_repair_backoff() {
let mut last = 0; let num_tests = 100;
let mut times = 0; let res: usize = (0..num_tests)
let total: usize = (0..127) .map(|_| {
.map(|x| { let mut last = 0;
let rv = repair_backoff(&mut last, &mut times, 1) as usize; let mut times = 0;
assert_eq!(times, x + 2); let total: usize = (0..127)
rv .map(|x| {
let rv = repair_backoff(&mut last, &mut times, 1) as usize;
assert_eq!(times, x + 2);
rv
})
.sum();
assert_eq!(times, 128);
assert_eq!(last, 1);
repair_backoff(&mut last, &mut times, 1);
assert_eq!(times, 64);
repair_backoff(&mut last, &mut times, 2);
assert_eq!(times, 2);
assert_eq!(last, 2);
total
}) })
.sum(); .sum();
assert_eq!(times, 128); let avg = res / num_tests;
assert_eq!(last, 1); assert!(avg >= 3);
assert!(total > 0); assert!(avg <= 5);
assert!(total < 127);
repair_backoff(&mut last, &mut times, 1);
assert_eq!(times, 64);
repair_backoff(&mut last, &mut times, 2);
assert_eq!(times, 2);
assert_eq!(last, 2);
} }
} }