polling/tests/precision.rs

79 lines
1.9 KiB
Rust

use std::io;
use std::time::{Duration, Instant};
use polling::Poller;
#[test]
fn below_ms() -> io::Result<()> {
let poller = Poller::new()?;
let mut events = Vec::new();
let dur = Duration::from_micros(100);
let margin = Duration::from_micros(500);
let mut lowest = Duration::from_secs(1000);
for _ in 0..1_000 {
let now = Instant::now();
let n = poller.wait(&mut events, Some(dur))?;
let elapsed = now.elapsed();
assert_eq!(n, 0);
assert!(elapsed >= dur, "{:?} < {:?}", elapsed, dur);
lowest = lowest.min(elapsed);
}
if cfg!(all(
any(
target_os = "linux",
target_os = "android",
target_os = "macos",
target_os = "ios",
target_os = "tvos",
target_os = "watchos",
target_os = "freebsd",
),
not(polling_test_poll_backend)
)) {
assert!(lowest < dur + margin);
}
Ok(())
}
#[test]
fn above_ms() -> io::Result<()> {
let poller = Poller::new()?;
let mut events = Vec::new();
let dur = Duration::from_micros(3_100);
let margin = Duration::from_micros(500);
let mut lowest = Duration::from_secs(1000);
for _ in 0..1_000 {
let now = Instant::now();
let n = poller.wait(&mut events, Some(dur))?;
let elapsed = now.elapsed();
assert_eq!(n, 0);
assert!(elapsed >= dur, "{:?} < {:?}", elapsed, dur);
lowest = lowest.min(elapsed);
}
if cfg!(all(
any(
target_os = "linux",
target_os = "android",
target_os = "illumos",
target_os = "solaris",
target_os = "macos",
target_os = "ios",
target_os = "tvos",
target_os = "watchos",
target_os = "freebsd",
),
not(polling_test_poll_backend)
)) {
assert!(lowest < dur + margin);
}
Ok(())
}