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io: add test for take bug #4443

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merged 2 commits into from Feb 2, 2022
Merged

io: add test for take bug #4443

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dfc8e66
io: add test for take bug
Darksonn Jan 28, 2022
fa2cf8a
rustfmt
Darksonn Jan 28, 2022
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15 changes: 15 additions & 0 deletions tokio/tests/io_take.rs
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Expand Up @@ -17,6 +17,21 @@ async fn take() {
assert_eq!(&buf, &b"hell\0\0"[..]);
}

#[tokio::test]
async fn issue_4435() {
let mut buf = [0; 8];
let rd: &[u8] = b"hello world";

let rd = rd.take(4);
tokio::pin!(rd);

let mut read_buf = ReadBuf::new(&mut buf);
read_buf.put_slice(b"AB");

futures::future::poll_fn(|cx| rd.as_mut().poll_read(cx, &mut read_buf)).await.unwrap();
assert_eq!(&buf, &b"ABhell\0\0"[..]);
}

struct BadReader;

impl AsyncRead for BadReader {
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