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#![deny(warnings, rust_2018_idioms)]
#[cfg(feature = "std")]
use bytes::buf::IoSliceMut;
use bytes::{BufMut, BytesMut};
use core::fmt::Write;
use core::usize;
#[test]
fn test_vec_as_mut_buf() {
let mut buf = Vec::with_capacity(64);
assert_eq!(buf.remaining_mut(), usize::MAX);
assert!(buf.bytes_mut().len() >= 64);
buf.put(&b"zomg"[..]);
assert_eq!(&buf, b"zomg");
assert_eq!(buf.remaining_mut(), usize::MAX - 4);
assert_eq!(buf.capacity(), 64);
for _ in 0..16 {
buf.put(&b"zomg"[..]);
}
assert_eq!(buf.len(), 68);
}
#[test]
fn test_put_u8() {
let mut buf = Vec::with_capacity(8);
buf.put_u8(33);
assert_eq!(b"\x21", &buf[..]);
}
#[test]
fn test_put_u16() {
let mut buf = Vec::with_capacity(8);
buf.put_u16(8532);
assert_eq!(b"\x21\x54", &buf[..]);
buf.clear();
buf.put_u16_le(8532);
assert_eq!(b"\x54\x21", &buf[..]);
}
#[test]
#[should_panic(expected = "cannot advance")]
fn test_vec_advance_mut() {
// Verify fix for #354
let mut buf = Vec::with_capacity(8);
unsafe {
buf.advance_mut(12);
}
}
#[test]
fn test_clone() {
let mut buf = BytesMut::with_capacity(100);
buf.write_str("this is a test").unwrap();
let buf2 = buf.clone();
buf.write_str(" of our emergency broadcast system").unwrap();
assert!(buf != buf2);
}
#[cfg(feature = "std")]
#[test]
fn test_bufs_vec_mut() {
let b1: &mut [u8] = &mut [];
let b2: &mut [u8] = &mut [];
let mut dst = [IoSliceMut::from(b1), IoSliceMut::from(b2)];
// with no capacity
let mut buf = BytesMut::new();
assert_eq!(buf.capacity(), 0);
assert_eq!(1, buf.bytes_vectored_mut(&mut dst[..]));
// with capacity
let mut buf = BytesMut::with_capacity(64);
assert_eq!(1, buf.bytes_vectored_mut(&mut dst[..]));
}
#[test]
fn test_mut_slice() {
let mut v = vec![0, 0, 0, 0];
let mut s = &mut v[..];
s.put_u32(42);
}
#[test]
fn test_deref_bufmut_forwards() {
struct Special;
impl BufMut for Special {
fn remaining_mut(&self) -> usize {
unreachable!("remaining_mut");
}
fn bytes_mut(&mut self) -> &mut [std::mem::MaybeUninit<u8>] {
unreachable!("bytes_mut");
}
unsafe fn advance_mut(&mut self, _: usize) {
unreachable!("advance");
}
fn put_u8(&mut self, _: u8) {
// specialized!
}
}
// these should all use the specialized method
Special.put_u8(b'x');
(&mut Special as &mut dyn BufMut).put_u8(b'x');
(Box::new(Special) as Box<dyn BufMut>).put_u8(b'x');
Box::new(Special).put_u8(b'x');
}
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