mirror of
https://github.com/openharmony/third_party_rust_bytes.git
synced 2026-07-21 04:15:24 -04:00
Carl Lerche
0c6b4179e3
This brings `BytesMut` in line with `Vec<u8>` behavior. This also fixes an existing bug in BytesMut::bytes_mut that exposes invalid slices. The bug was recently introduced and was only on master and never released to `crates.io`. In order to fix a test, `BufMutExt::chain_mut` is provided. Withou this, it is not possible to chain two `&mut [u8]`. Closes #170
90 lines
1.9 KiB
Rust
90 lines
1.9 KiB
Rust
#![deny(warnings, rust_2018_idioms)]
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use bytes::{buf::IoSliceMut, BufMut, BytesMut};
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use std::usize;
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use std::fmt::Write;
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#[test]
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fn test_vec_as_mut_buf() {
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let mut buf = Vec::with_capacity(64);
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assert_eq!(buf.remaining_mut(), usize::MAX);
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assert!(buf.bytes_mut().len() >= 64);
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buf.put(&b"zomg"[..]);
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assert_eq!(&buf, b"zomg");
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assert_eq!(buf.remaining_mut(), usize::MAX - 4);
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assert_eq!(buf.capacity(), 64);
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for _ in 0..16 {
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buf.put(&b"zomg"[..]);
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}
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assert_eq!(buf.len(), 68);
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}
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#[test]
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fn test_put_u8() {
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let mut buf = Vec::with_capacity(8);
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buf.put_u8(33);
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assert_eq!(b"\x21", &buf[..]);
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}
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#[test]
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fn test_put_u16() {
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let mut buf = Vec::with_capacity(8);
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buf.put_u16(8532);
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assert_eq!(b"\x21\x54", &buf[..]);
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buf.clear();
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buf.put_u16_le(8532);
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assert_eq!(b"\x54\x21", &buf[..]);
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}
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#[test]
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fn test_vec_advance_mut() {
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// Regression test for carllerche/bytes#108.
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let mut buf = Vec::with_capacity(8);
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unsafe {
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buf.advance_mut(12);
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assert_eq!(buf.len(), 12);
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assert!(buf.capacity() >= 12, "capacity: {}", buf.capacity());
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}
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}
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#[test]
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fn test_clone() {
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let mut buf = BytesMut::with_capacity(100);
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buf.write_str("this is a test").unwrap();
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let buf2 = buf.clone();
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buf.write_str(" of our emergency broadcast system").unwrap();
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assert!(buf != buf2);
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}
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#[test]
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fn test_bufs_vec_mut() {
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let b1: &mut [u8] = &mut [];
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let b2: &mut [u8] = &mut [];
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let mut dst = [IoSliceMut::from(b1), IoSliceMut::from(b2)];
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// with no capacity
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let mut buf = BytesMut::new();
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assert_eq!(buf.capacity(), 0);
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assert_eq!(1, buf.bytes_vectored_mut(&mut dst[..]));
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// with capacity
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let mut buf = BytesMut::with_capacity(64);
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assert_eq!(1, buf.bytes_vectored_mut(&mut dst[..]));
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}
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#[test]
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fn test_mut_slice() {
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let mut v = vec![0, 0, 0, 0];
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let mut s = &mut v[..];
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s.put_u32(42);
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}
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