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|
#![warn(rust_2018_idioms)]
use bytes::Buf;
#[cfg(feature = "std")]
use std::io::IoSlice;
#[test]
fn test_fresh_cursor_vec() {
let mut buf = &b"hello"[..];
assert_eq!(buf.remaining(), 5);
assert_eq!(buf.chunk(), b"hello");
buf.advance(2);
assert_eq!(buf.remaining(), 3);
assert_eq!(buf.chunk(), b"llo");
buf.advance(3);
assert_eq!(buf.remaining(), 0);
assert_eq!(buf.chunk(), b"");
}
#[test]
fn test_get_u8() {
let mut buf = &b"\x21zomg"[..];
assert_eq!(0x21, buf.get_u8());
}
#[test]
fn test_get_u16() {
let mut buf = &b"\x21\x54zomg"[..];
assert_eq!(0x2154, buf.get_u16());
let mut buf = &b"\x21\x54zomg"[..];
assert_eq!(0x5421, buf.get_u16_le());
}
#[test]
#[should_panic]
fn test_get_u16_buffer_underflow() {
let mut buf = &b"\x21"[..];
buf.get_u16();
}
#[cfg(feature = "std")]
#[test]
fn test_bufs_vec() {
let buf = &b"hello world"[..];
let b1: &[u8] = &mut [];
let b2: &[u8] = &mut [];
let mut dst = [IoSlice::new(b1), IoSlice::new(b2)];
assert_eq!(1, buf.chunks_vectored(&mut dst[..]));
}
#[test]
fn test_vec_deque() {
use std::collections::VecDeque;
let mut buffer: VecDeque<u8> = VecDeque::new();
buffer.extend(b"hello world");
assert_eq!(11, buffer.remaining());
assert_eq!(b"hello world", buffer.chunk());
buffer.advance(6);
assert_eq!(b"world", buffer.chunk());
buffer.extend(b" piece");
let mut out = [0; 11];
buffer.copy_to_slice(&mut out);
assert_eq!(b"world piece", &out[..]);
}
#[test]
fn test_deref_buf_forwards() {
struct Special;
impl Buf for Special {
fn remaining(&self) -> usize {
unreachable!("remaining");
}
fn chunk(&self) -> &[u8] {
unreachable!("chunk");
}
fn advance(&mut self, _: usize) {
unreachable!("advance");
}
fn get_u8(&mut self) -> u8 {
// specialized!
b'x'
}
}
// these should all use the specialized method
assert_eq!(Special.get_u8(), b'x');
assert_eq!((&mut Special as &mut dyn Buf).get_u8(), b'x');
assert_eq!((Box::new(Special) as Box<dyn Buf>).get_u8(), b'x');
assert_eq!(Box::new(Special).get_u8(), b'x');
}
#[test]
fn copy_to_bytes_less() {
let mut buf = &b"hello world"[..];
let bytes = buf.copy_to_bytes(5);
assert_eq!(bytes, &b"hello"[..]);
assert_eq!(buf, &b" world"[..])
}
#[test]
#[should_panic]
fn copy_to_bytes_overflow() {
let mut buf = &b"hello world"[..];
let _bytes = buf.copy_to_bytes(12);
}
|
