extern crate futures;
use futures::executor::block_on;
use futures::prelude::*;
use futures::stream::iter_ok;
struct Join<T, U>(T, U);
impl<T: Stream, U> Stream for Join<T, U> {
type Item = T::Item;
type Error = T::Error;
fn poll_next(&mut self, cx: &mut task::Context) -> Poll<Option<T::Item>, T::Error> {
self.0.poll_next(cx)
}
}
impl<T, U: Sink> Sink for Join<T, U> {
type SinkItem = U::SinkItem;
type SinkError = U::SinkError;
fn poll_ready(&mut self, cx: &mut task::Context) -> Poll<(), Self::SinkError> {
self.1.poll_ready(cx)
}
fn start_send(&mut self, item: Self::SinkItem) -> Result<(), Self::SinkError> {
self.1.start_send(item)
}
fn poll_flush(&mut self, cx: &mut task::Context) -> Poll<(), Self::SinkError> {
self.1.poll_flush(cx)
}
fn poll_close(&mut self, cx: &mut task::Context) -> Poll<(), Self::SinkError> {
self.1.poll_close(cx)
}
}
#[test]
fn test_split() {
let mut dest = Vec::new();
{
let j = Join(iter_ok(vec![10, 20, 30]), &mut dest);
let (sink, stream) = j.split();
let j = sink.reunite(stream).expect("test_split: reunite error");
let (sink, stream) = j.split();
block_on(sink.send_all(stream)).unwrap();
}
assert_eq!(dest, vec![10, 20, 30]);
}