You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: zero.rs
    path of file: ./repos/flume/tests
    
    the code of the file until where you have to start completion: //! Tests for the zero channel flavor.

extern crate crossbeam_utils;
extern crate rand;

use std::any::Any;
use std::sync::atomic::AtomicUsize;
use std::sync::atomic::Ordering;
use std::thread;
use std::time::Duration;

use flume::{bounded, Receiver};
use flume::{RecvError, RecvTimeoutError, TryRecvError};
use flume::{SendError, SendTimeoutError, TrySendError};
use crossbeam_utils::thread::scope;
use rand::{thread_rng, Rng};

fn ms(ms: u64) -> Duration {
    Duration::from
    
fn send_timeout() {
    let (s, r) = bounded(0);

    scope(|scope| {
        scope.spawn(move |_| {
            assert_eq!(
                s.send_timeout(7, ms(1000)),
                Err(SendTimeoutError::Timeout(7))
            );
            assert_eq!(s.send_timeout(8, ms(1000)), Ok(()));
            assert_eq!(
                s.send_timeout(9, ms(1000)),
                Err(SendTimeoutError::Disconnected(9))
            );
        });
        scope.spawn(move |_| {
            thread::sleep(ms(1500));
            assert_eq!(r.recv(), Ok(8));
        });
    })
    .unwrap();
}