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extern crate bytes;
extern crate futures;
extern crate tokio_io;
use bytes::{BufMut, BytesMut};
use futures::Async;
use tokio_io::AsyncRead;
use std::io::{self, Read};
#[test]
fn read_buf_success() {
struct R;
impl Read for R {
fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
buf[0..11].copy_from_slice(b"hello world");
Ok(11)
}
}
impl AsyncRead for R {}
let mut buf = BytesMut::with_capacity(65);
let n = match R.read_buf(&mut buf).unwrap() {
Async::Ready(n) => n,
_ => panic!(),
};
assert_eq!(11, n);
assert_eq!(buf[..], b"hello world"[..]);
}
#[test]
fn read_buf_error() {
struct R;
impl Read for R {
fn read(&mut self, _: &mut [u8]) -> io::Result<usize> {
Err(io::Error::new(io::ErrorKind::Other, "other"))
}
}
impl AsyncRead for R {}
let mut buf = BytesMut::with_capacity(65);
let err = R.read_buf(&mut buf).unwrap_err();
assert_eq!(err.kind(), io::ErrorKind::Other);
}
#[test]
fn read_buf_no_capacity() {
struct R;
impl Read for R {
fn read(&mut self, _: &mut [u8]) -> io::Result<usize> {
unimplemented!();
}
}
impl AsyncRead for R {}
// Can't create BytesMut w/ zero capacity, so fill it up
let mut buf = BytesMut::with_capacity(64);
buf.put(&[0; 64][..]);
let n = match R.read_buf(&mut buf).unwrap() {
Async::Ready(n) => n,
_ => panic!(),
};
assert_eq!(0, n);
}
#[test]
fn read_buf_no_uninitialized() {
struct R;
impl Read for R {
fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
for b in buf {
assert_eq!(0, *b);
}
Ok(0)
}
}
impl AsyncRead for R {}
// Can't create BytesMut w/ zero capacity, so fill it up
let mut buf = BytesMut::with_capacity(64);
let n = match R.read_buf(&mut buf).unwrap() {
Async::Ready(n) => n,
_ => panic!(),
};
assert_eq!(0, n);
}
#[test]
fn read_buf_uninitialized_ok() {
struct R;
impl Read for R {
fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
assert_eq!(buf[0..11], b"hello world"[..]);
Ok(0)
}
}
impl AsyncRead for R {
unsafe fn prepare_uninitialized_buffer(&self, _: &mut [u8]) -> bool {
false
}
}
// Can't create BytesMut w/ zero capacity, so fill it up
let mut buf = BytesMut::with_capacity(64);
unsafe {
buf.bytes_mut()[0..11].copy_from_slice(b"hello world");
}
let n = match R.read_buf(&mut buf).unwrap() {
Async::Ready(n) => n,
_ => panic!(),
};
assert_eq!(0, n);
}
#[test]
fn read_buf_translate_wouldblock_to_not_ready() {
struct R;
impl Read for R {
fn read(&mut self, _: &mut [u8]) -> io::Result<usize> {
Err(io::Error::new(io::ErrorKind::WouldBlock, ""))
}
}
impl AsyncRead for R {}
let mut buf = BytesMut::with_capacity(65);
assert!(!R.read_buf(&mut buf).unwrap().is_ready());
}
|
