58 lines
1.7 KiB
Rust
58 lines
1.7 KiB
Rust
use futures::executor::block_on;
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use futures::sink::{Sink, SinkExt};
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use futures::stream::{self, Stream, StreamExt};
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use futures::task::{Context, Poll};
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use pin_project::pin_project;
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use std::pin::Pin;
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#[test]
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fn test_split() {
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#[pin_project]
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struct Join<T, U> {
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#[pin]
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stream: T,
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#[pin]
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sink: U,
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}
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impl<T: Stream, U> Stream for Join<T, U> {
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type Item = T::Item;
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fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<T::Item>> {
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self.project().stream.poll_next(cx)
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}
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}
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impl<T, U: Sink<Item>, Item> Sink<Item> for Join<T, U> {
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type Error = U::Error;
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fn poll_ready(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
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self.project().sink.poll_ready(cx)
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}
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fn start_send(self: Pin<&mut Self>, item: Item) -> Result<(), Self::Error> {
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self.project().sink.start_send(item)
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}
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fn poll_flush(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
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self.project().sink.poll_flush(cx)
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}
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fn poll_close(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
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self.project().sink.poll_close(cx)
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}
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}
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let mut dest: Vec<i32> = Vec::new();
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{
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let join = Join { stream: stream::iter(vec![10, 20, 30]), sink: &mut dest };
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let (sink, stream) = join.split();
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let join = sink.reunite(stream).expect("test_split: reunite error");
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let (mut sink, stream) = join.split();
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let mut stream = stream.map(Ok);
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block_on(sink.send_all(&mut stream)).unwrap();
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}
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assert_eq!(dest, vec![10, 20, 30]);
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}
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