| #![deny(warnings, rust_2018_idioms)] |
| |
| use bytes::{buf::IoSliceMut, BufMut, BytesMut}; |
| use std::usize; |
| use std::fmt::Write; |
| |
| #[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] |
| 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 emergency broadcast system").unwrap(); |
| assert!(buf != buf2); |
| } |
| |
| #[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'); |
| } |