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use futures_core::stream::Stream;
use std::{io, pin::Pin};
use tokio_test::{assert_ready, io::Builder, task};
use tokio_util::codec::{BytesCodec, FramedRead};
macro_rules! pin {
($id:ident) => {
Pin::new(&mut $id)
};
}
macro_rules! assert_read {
($e:expr, $n:expr) => {{
let val = assert_ready!($e);
assert_eq!(val.unwrap().unwrap(), $n);
}};
}
#[tokio::test]
async fn return_none_after_error() {
let mut io = FramedRead::new(
Builder::new()
.read(b"abcdef")
.read_error(io::Error::new(io::ErrorKind::Other, "Resource errored out"))
.read(b"more data")
.build(),
BytesCodec::new(),
);
let mut task = task::spawn(());
task.enter(|cx, _| {
assert_read!(pin!(io).poll_next(cx), b"abcdef".to_vec());
assert!(assert_ready!(pin!(io).poll_next(cx)).unwrap().is_err());
assert!(assert_ready!(pin!(io).poll_next(cx)).is_none());
assert_read!(pin!(io).poll_next(cx), b"more data".to_vec());
})
}