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97 lines
3.1 KiB
97 lines
3.1 KiB
#[test]
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fn works_1() {
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use futures::channel::oneshot;
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use futures::executor::block_on_stream;
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use futures::stream::{StreamExt, FuturesOrdered};
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use futures_test::task::noop_context;
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let (a_tx, a_rx) = oneshot::channel::<i32>();
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let (b_tx, b_rx) = oneshot::channel::<i32>();
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let (c_tx, c_rx) = oneshot::channel::<i32>();
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let mut stream = vec![a_rx, b_rx, c_rx].into_iter().collect::<FuturesOrdered<_>>();
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b_tx.send(99).unwrap();
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assert!(stream.poll_next_unpin(&mut noop_context()).is_pending());
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a_tx.send(33).unwrap();
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c_tx.send(33).unwrap();
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let mut iter = block_on_stream(stream);
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assert_eq!(Some(Ok(33)), iter.next());
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assert_eq!(Some(Ok(99)), iter.next());
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assert_eq!(Some(Ok(33)), iter.next());
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assert_eq!(None, iter.next());
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}
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#[test]
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fn works_2() {
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use futures::channel::oneshot;
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use futures::future::{join, FutureExt};
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use futures::stream::{StreamExt, FuturesOrdered};
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use futures_test::task::noop_context;
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let (a_tx, a_rx) = oneshot::channel::<i32>();
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let (b_tx, b_rx) = oneshot::channel::<i32>();
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let (c_tx, c_rx) = oneshot::channel::<i32>();
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let mut stream = vec![
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a_rx.boxed(),
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join(b_rx, c_rx).map(|(a, b)| Ok(a? + b?)).boxed(),
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].into_iter().collect::<FuturesOrdered<_>>();
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let mut cx = noop_context();
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a_tx.send(33).unwrap();
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b_tx.send(33).unwrap();
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assert!(stream.poll_next_unpin(&mut cx).is_ready());
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assert!(stream.poll_next_unpin(&mut cx).is_pending());
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c_tx.send(33).unwrap();
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assert!(stream.poll_next_unpin(&mut cx).is_ready());
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}
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#[test]
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fn from_iterator() {
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use futures::executor::block_on;
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use futures::future;
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use futures::stream::{StreamExt, FuturesOrdered};
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let stream = vec![
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future::ready::<i32>(1),
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future::ready::<i32>(2),
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future::ready::<i32>(3)
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].into_iter().collect::<FuturesOrdered<_>>();
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assert_eq!(stream.len(), 3);
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assert_eq!(block_on(stream.collect::<Vec<_>>()), vec![1,2,3]);
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}
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#[test]
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fn queue_never_unblocked() {
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use futures::channel::oneshot;
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use futures::future::{self, Future, TryFutureExt};
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use futures::stream::{StreamExt, FuturesOrdered};
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use futures_test::task::noop_context;
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use std::any::Any;
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let (_a_tx, a_rx) = oneshot::channel::<Box<dyn Any + Send>>();
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let (b_tx, b_rx) = oneshot::channel::<Box<dyn Any + Send>>();
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let (c_tx, c_rx) = oneshot::channel::<Box<dyn Any + Send>>();
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let mut stream = vec![
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Box::new(a_rx) as Box<dyn Future<Output = _> + Unpin>,
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Box::new(future::try_select(b_rx, c_rx)
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.map_err(|e| e.factor_first().0)
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.and_then(|e| future::ok(Box::new(e) as Box<dyn Any + Send>))) as _,
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].into_iter().collect::<FuturesOrdered<_>>();
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let cx = &mut noop_context();
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for _ in 0..10 {
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assert!(stream.poll_next_unpin(cx).is_pending());
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}
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b_tx.send(Box::new(())).unwrap();
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assert!(stream.poll_next_unpin(cx).is_pending());
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c_tx.send(Box::new(())).unwrap();
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assert!(stream.poll_next_unpin(cx).is_pending());
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assert!(stream.poll_next_unpin(cx).is_pending());
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}
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