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130 lines
2.8 KiB
130 lines
2.8 KiB
#![warn(rust_2018_idioms)]
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use bytes::buf::UninitSlice;
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use bytes::{BufMut, BytesMut};
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use core::fmt::Write;
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use core::usize;
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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.chunk_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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#[should_panic(expected = "cannot advance")]
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fn test_vec_advance_mut() {
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// Verify fix for #354
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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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}
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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_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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#[test]
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fn test_deref_bufmut_forwards() {
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struct Special;
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unsafe impl BufMut for Special {
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fn remaining_mut(&self) -> usize {
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unreachable!("remaining_mut");
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}
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fn chunk_mut(&mut self) -> &mut UninitSlice {
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unreachable!("chunk_mut");
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}
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unsafe fn advance_mut(&mut self, _: usize) {
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unreachable!("advance");
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}
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fn put_u8(&mut self, _: u8) {
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// specialized!
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}
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}
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// these should all use the specialized method
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Special.put_u8(b'x');
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(&mut Special as &mut dyn BufMut).put_u8(b'x');
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(Box::new(Special) as Box<dyn BufMut>).put_u8(b'x');
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Box::new(Special).put_u8(b'x');
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}
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#[test]
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#[should_panic]
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fn write_byte_panics_if_out_of_bounds() {
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let mut data = [b'b', b'a', b'r'];
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let slice = unsafe { UninitSlice::from_raw_parts_mut(data.as_mut_ptr(), 3) };
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slice.write_byte(4, b'f');
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}
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#[test]
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#[should_panic]
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fn copy_from_slice_panics_if_different_length_1() {
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let mut data = [b'b', b'a', b'r'];
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let slice = unsafe { UninitSlice::from_raw_parts_mut(data.as_mut_ptr(), 3) };
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slice.copy_from_slice(b"a");
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}
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#[test]
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#[should_panic]
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fn copy_from_slice_panics_if_different_length_2() {
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let mut data = [b'b', b'a', b'r'];
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let slice = unsafe { UninitSlice::from_raw_parts_mut(data.as_mut_ptr(), 3) };
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slice.copy_from_slice(b"abcd");
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}
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