oneshot.rs - mozsearch

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use futures::channel::oneshot;

use futures::future::{FutureExt, TryFutureExt};

use futures_test::future::FutureTestExt;

use std::sync::mpsc;

use std::thread;

#[test]

fn oneshot_send1() {

    let (tx1, rx1) = oneshot::channel::<i32>();

    let (tx2, rx2) = mpsc::channel();

    let t = thread::spawn(|| tx1.send(1).unwrap());

    rx1.map_ok(move |x| tx2.send(x)).run_in_background();

    assert_eq!(1, rx2.recv().unwrap());

    t.join().unwrap();

#[test]

fn oneshot_send2() {

    let (tx1, rx1) = oneshot::channel::<i32>();

    let (tx2, rx2) = mpsc::channel();

    thread::spawn(|| tx1.send(1).unwrap()).join().unwrap();

    rx1.map_ok(move |x| tx2.send(x).unwrap()).run_in_background();

    assert_eq!(1, rx2.recv().unwrap());

#[test]

fn oneshot_send3() {

    let (tx1, rx1) = oneshot::channel::<i32>();

    let (tx2, rx2) = mpsc::channel();

    rx1.map_ok(move |x| tx2.send(x).unwrap()).run_in_background();

    thread::spawn(|| tx1.send(1).unwrap()).join().unwrap();

    assert_eq!(1, rx2.recv().unwrap());

#[test]

fn oneshot_drop_tx1() {

    let (tx1, rx1) = oneshot::channel::<i32>();

    let (tx2, rx2) = mpsc::channel();

    drop(tx1);

    rx1.map(move |result| tx2.send(result).unwrap()).run_in_background();

    assert_eq!(Err(oneshot::Canceled), rx2.recv().unwrap());

#[test]

fn oneshot_drop_tx2() {

    let (tx1, rx1) = oneshot::channel::<i32>();

    let (tx2, rx2) = mpsc::channel();

    let t = thread::spawn(|| drop(tx1));

    rx1.map(move |result| tx2.send(result).unwrap()).run_in_background();

    t.join().unwrap();

    assert_eq!(Err(oneshot::Canceled), rx2.recv().unwrap());

#[test]

fn oneshot_drop_rx() {

    let (tx, rx) = oneshot::channel::<i32>();

    drop(rx);

    assert_eq!(Err(2), tx.send(2));

#[test]

fn oneshot_debug() {

    let (tx, rx) = oneshot::channel::<i32>();

    assert_eq!(format!("{:?}", tx), "Sender { complete: false }");

    assert_eq!(format!("{:?}", rx), "Receiver { complete: false }");

    drop(rx);

    assert_eq!(format!("{:?}", tx), "Sender { complete: true }");

    let (tx, rx) = oneshot::channel::<i32>();

    drop(tx);

    assert_eq!(format!("{:?}", rx), "Receiver { complete: true }");