#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::time::Duration;
fn main() {
    assert!(Duration::ZERO.is_zero());
    assert!(Duration::new(0, 0).is_zero());
    assert!(Duration::from_nanos(0).is_zero());
    assert!(Duration::from_secs(0).is_zero());
    assert!(! Duration::new(1, 1).is_zero());
    assert!(! Duration::from_nanos(1).is_zero());
    assert!(! Duration::from_secs(1).is_zero());
}