mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-23 06:42:23 +00:00
156 lines
3.9 KiB
Rust
156 lines
3.9 KiB
Rust
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#![warn(rust_2018_idioms)]
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use bytes::{Buf, BufMut, Bytes};
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#[cfg(feature = "std")]
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use std::io::IoSlice;
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#[test]
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fn collect_two_bufs() {
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let a = Bytes::from(&b"hello"[..]);
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let b = Bytes::from(&b"world"[..]);
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let res = a.chain(b).copy_to_bytes(10);
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assert_eq!(res, &b"helloworld"[..]);
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}
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#[test]
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fn writing_chained() {
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let mut a = [0u8; 64];
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let mut b = [0u8; 64];
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{
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let mut buf = (&mut a[..]).chain_mut(&mut b[..]);
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for i in 0u8..128 {
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buf.put_u8(i);
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}
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}
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for i in 0..64 {
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let expect = i as u8;
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assert_eq!(expect, a[i]);
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assert_eq!(expect + 64, b[i]);
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}
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}
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#[test]
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fn iterating_two_bufs() {
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let a = Bytes::from(&b"hello"[..]);
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let b = Bytes::from(&b"world"[..]);
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let res: Vec<u8> = a.chain(b).into_iter().collect();
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assert_eq!(res, &b"helloworld"[..]);
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}
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#[cfg(feature = "std")]
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#[test]
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fn vectored_read() {
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let a = Bytes::from(&b"hello"[..]);
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let b = Bytes::from(&b"world"[..]);
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let mut buf = a.chain(b);
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{
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let b1: &[u8] = &mut [];
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let b2: &[u8] = &mut [];
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let b3: &[u8] = &mut [];
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let b4: &[u8] = &mut [];
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let mut iovecs = [
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IoSlice::new(b1),
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IoSlice::new(b2),
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IoSlice::new(b3),
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IoSlice::new(b4),
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];
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assert_eq!(2, buf.chunks_vectored(&mut iovecs));
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assert_eq!(iovecs[0][..], b"hello"[..]);
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assert_eq!(iovecs[1][..], b"world"[..]);
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assert_eq!(iovecs[2][..], b""[..]);
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assert_eq!(iovecs[3][..], b""[..]);
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}
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buf.advance(2);
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{
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let b1: &[u8] = &mut [];
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let b2: &[u8] = &mut [];
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let b3: &[u8] = &mut [];
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let b4: &[u8] = &mut [];
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let mut iovecs = [
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IoSlice::new(b1),
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IoSlice::new(b2),
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IoSlice::new(b3),
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IoSlice::new(b4),
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];
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assert_eq!(2, buf.chunks_vectored(&mut iovecs));
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assert_eq!(iovecs[0][..], b"llo"[..]);
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assert_eq!(iovecs[1][..], b"world"[..]);
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assert_eq!(iovecs[2][..], b""[..]);
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assert_eq!(iovecs[3][..], b""[..]);
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}
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buf.advance(3);
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{
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let b1: &[u8] = &mut [];
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let b2: &[u8] = &mut [];
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let b3: &[u8] = &mut [];
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let b4: &[u8] = &mut [];
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let mut iovecs = [
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IoSlice::new(b1),
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IoSlice::new(b2),
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IoSlice::new(b3),
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IoSlice::new(b4),
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];
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assert_eq!(1, buf.chunks_vectored(&mut iovecs));
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assert_eq!(iovecs[0][..], b"world"[..]);
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assert_eq!(iovecs[1][..], b""[..]);
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assert_eq!(iovecs[2][..], b""[..]);
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assert_eq!(iovecs[3][..], b""[..]);
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}
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buf.advance(3);
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{
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let b1: &[u8] = &mut [];
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let b2: &[u8] = &mut [];
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let b3: &[u8] = &mut [];
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let b4: &[u8] = &mut [];
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let mut iovecs = [
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IoSlice::new(b1),
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IoSlice::new(b2),
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IoSlice::new(b3),
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IoSlice::new(b4),
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];
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assert_eq!(1, buf.chunks_vectored(&mut iovecs));
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assert_eq!(iovecs[0][..], b"ld"[..]);
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assert_eq!(iovecs[1][..], b""[..]);
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assert_eq!(iovecs[2][..], b""[..]);
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assert_eq!(iovecs[3][..], b""[..]);
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}
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}
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#[test]
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fn chain_get_bytes() {
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let mut ab = Bytes::copy_from_slice(b"ab");
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let mut cd = Bytes::copy_from_slice(b"cd");
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let ab_ptr = ab.as_ptr();
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let cd_ptr = cd.as_ptr();
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let mut chain = (&mut ab).chain(&mut cd);
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let a = chain.copy_to_bytes(1);
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let bc = chain.copy_to_bytes(2);
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let d = chain.copy_to_bytes(1);
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assert_eq!(Bytes::copy_from_slice(b"a"), a);
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assert_eq!(Bytes::copy_from_slice(b"bc"), bc);
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assert_eq!(Bytes::copy_from_slice(b"d"), d);
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// assert `get_bytes` did not allocate
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assert_eq!(ab_ptr, a.as_ptr());
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// assert `get_bytes` did not allocate
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assert_eq!(cd_ptr.wrapping_offset(1), d.as_ptr());
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}
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