зеркало из https://github.com/mozilla/gecko-dev.git
62 строки
1.3 KiB
Rust
62 строки
1.3 KiB
Rust
#![warn(rust_2018_idioms)]
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#![cfg(feature = "full")]
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use std::pin::Pin;
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use std::task::{Context, Poll};
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use tokio::io::{self, AsyncRead, AsyncReadExt, ReadBuf};
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use tokio_test::assert_ok;
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#[tokio::test]
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async fn take() {
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let mut buf = [0; 6];
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let rd: &[u8] = b"hello world";
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let mut rd = rd.take(4);
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let n = assert_ok!(rd.read(&mut buf).await);
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assert_eq!(n, 4);
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assert_eq!(&buf, &b"hell\0\0"[..]);
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}
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#[tokio::test]
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async fn issue_4435() {
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let mut buf = [0; 8];
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let rd: &[u8] = b"hello world";
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let rd = rd.take(4);
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tokio::pin!(rd);
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let mut read_buf = ReadBuf::new(&mut buf);
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read_buf.put_slice(b"AB");
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futures::future::poll_fn(|cx| rd.as_mut().poll_read(cx, &mut read_buf))
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.await
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.unwrap();
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assert_eq!(&buf, &b"ABhell\0\0"[..]);
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}
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struct BadReader;
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impl AsyncRead for BadReader {
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fn poll_read(
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self: Pin<&mut Self>,
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_cx: &mut Context<'_>,
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read_buf: &mut ReadBuf<'_>,
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) -> Poll<io::Result<()>> {
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let vec = vec![0; 10];
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let mut buf = ReadBuf::new(vec.leak());
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buf.put_slice(&[123; 10]);
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*read_buf = buf;
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Poll::Ready(Ok(()))
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}
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}
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#[tokio::test]
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#[should_panic]
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async fn bad_reader_fails() {
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let mut buf = Vec::with_capacity(10);
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BadReader.take(10).read_buf(&mut buf).await.unwrap();
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}
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