/
test_buf_mut.rs
89 lines (71 loc) · 1.82 KB
/
test_buf_mut.rs
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extern crate bytes;
extern crate byteorder;
use bytes::{BufMut, BytesMut};
use std::usize;
use std::fmt::Write;
use std::io::IoSliceMut;
#[test]
fn test_vec_as_mut_buf() {
let mut buf = Vec::with_capacity(64);
assert_eq!(buf.remaining_mut(), usize::MAX);
unsafe {
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]
fn test_vec_advance_mut() {
// Regression test for carllerche/bytes#108.
let mut buf = Vec::with_capacity(8);
unsafe {
buf.advance_mut(12);
assert_eq!(buf.len(), 12);
assert!(buf.capacity() >= 12, "capacity: {}", buf.capacity());
}
}
#[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 emergecy broadcast system").unwrap();
assert!(buf != buf2);
}
#[test]
fn test_bufs_vec_mut() {
let mut buf = BytesMut::from(&b"hello world"[..]);
let b1: &mut [u8] = &mut [];
let b2: &mut [u8] = &mut [];
let mut dst = [IoSliceMut::new(b1), IoSliceMut::new(b2)];
unsafe {
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);
}