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#![warn(rust_2018_idioms)]
use bytes::Bytes;
use tokio::io::AsyncReadExt;
use tokio_stream::iter;
use tokio_util::io::StreamReader;
#[tokio::test]
async fn test_stream_reader() -> std::io::Result<()> {
let stream = iter(vec![
std::io::Result::Ok(Bytes::from_static(&[])),
Ok(Bytes::from_static(&[0, 1, 2, 3])),
Ok(Bytes::from_static(&[])),
Ok(Bytes::from_static(&[4, 5, 6, 7])),
Ok(Bytes::from_static(&[])),
Ok(Bytes::from_static(&[8, 9, 10, 11])),
Ok(Bytes::from_static(&[])),
]);
let mut read = StreamReader::new(stream);
let mut buf = [0; 5];
read.read_exact(&mut buf).await?;
assert_eq!(buf, [0, 1, 2, 3, 4]);
assert_eq!(read.read(&mut buf).await?, 3);
assert_eq!(&buf[..3], [5, 6, 7]);
assert_eq!(read.read(&mut buf).await?, 4);
assert_eq!(&buf[..4], [8, 9, 10, 11]);
assert_eq!(read.read(&mut buf).await?, 0);
Ok(())
}
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