mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-24 18:55:30 +00:00
517 lines
12 KiB
Rust
517 lines
12 KiB
Rust
extern crate bytes;
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use bytes::{Bytes, BytesMut, BufMut};
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const LONG: &'static [u8] = b"mary had a little lamb, little lamb, little lamb";
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const SHORT: &'static [u8] = b"hello world";
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fn inline_cap() -> usize {
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use std::mem;
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4 * mem::size_of::<usize>() - 1
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}
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fn is_sync<T: Sync>() {}
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fn is_send<T: Send>() {}
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#[test]
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fn test_bounds() {
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is_sync::<Bytes>();
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is_sync::<BytesMut>();
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is_send::<Bytes>();
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is_send::<BytesMut>();
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}
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#[test]
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fn from_slice() {
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let a = Bytes::from(&b"abcdefgh"[..]);
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assert_eq!(a, b"abcdefgh"[..]);
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assert_eq!(a, &b"abcdefgh"[..]);
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assert_eq!(a, Vec::from(&b"abcdefgh"[..]));
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assert_eq!(b"abcdefgh"[..], a);
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assert_eq!(&b"abcdefgh"[..], a);
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assert_eq!(Vec::from(&b"abcdefgh"[..]), a);
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let a = BytesMut::from(&b"abcdefgh"[..]);
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assert_eq!(a, b"abcdefgh"[..]);
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assert_eq!(a, &b"abcdefgh"[..]);
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assert_eq!(a, Vec::from(&b"abcdefgh"[..]));
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assert_eq!(b"abcdefgh"[..], a);
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assert_eq!(&b"abcdefgh"[..], a);
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assert_eq!(Vec::from(&b"abcdefgh"[..]), a);
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}
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#[test]
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fn fmt() {
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let a = format!("{:?}", Bytes::from(&b"abcdefg"[..]));
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let b = "b\"abcdefg\"";
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assert_eq!(a, b);
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let a = format!("{:?}", BytesMut::from(&b"abcdefg"[..]));
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assert_eq!(a, b);
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}
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#[test]
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fn fmt_write() {
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use std::fmt::Write;
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use std::iter::FromIterator;
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let s = String::from_iter((0..10).map(|_| "abcdefg"));
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let mut a = BytesMut::with_capacity(64);
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write!(a, "{}", &s[..64]).unwrap();
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assert_eq!(a, s[..64].as_bytes());
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let mut b = BytesMut::with_capacity(64);
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write!(b, "{}", &s[..32]).unwrap();
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write!(b, "{}", &s[32..64]).unwrap();
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assert_eq!(b, s[..64].as_bytes());
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let mut c = BytesMut::with_capacity(64);
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write!(c, "{}", s).unwrap_err();
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assert!(c.is_empty());
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}
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#[test]
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fn len() {
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let a = Bytes::from(&b"abcdefg"[..]);
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assert_eq!(a.len(), 7);
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let a = BytesMut::from(&b"abcdefg"[..]);
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assert_eq!(a.len(), 7);
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let a = Bytes::from(&b""[..]);
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assert!(a.is_empty());
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let a = BytesMut::from(&b""[..]);
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assert!(a.is_empty());
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}
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#[test]
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fn index() {
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let a = Bytes::from(&b"hello world"[..]);
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assert_eq!(a[0..5], *b"hello");
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}
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#[test]
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fn slice() {
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let a = Bytes::from(&b"hello world"[..]);
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let b = a.slice(3, 5);
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assert_eq!(b, b"lo"[..]);
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let b = a.slice(0, 0);
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assert_eq!(b, b""[..]);
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let b = a.slice(3, 3);
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assert_eq!(b, b""[..]);
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let b = a.slice(a.len(), a.len());
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assert_eq!(b, b""[..]);
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let b = a.slice_to(5);
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assert_eq!(b, b"hello"[..]);
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let b = a.slice_from(3);
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assert_eq!(b, b"lo world"[..]);
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}
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#[test]
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#[should_panic]
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fn slice_oob_1() {
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let a = Bytes::from(&b"hello world"[..]);
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a.slice(5, inline_cap() + 1);
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}
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#[test]
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#[should_panic]
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fn slice_oob_2() {
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let a = Bytes::from(&b"hello world"[..]);
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a.slice(inline_cap() + 1, inline_cap() + 5);
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}
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#[test]
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fn split_off() {
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let mut hello = Bytes::from(&b"helloworld"[..]);
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let world = hello.split_off(5);
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assert_eq!(hello, &b"hello"[..]);
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assert_eq!(world, &b"world"[..]);
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let mut hello = BytesMut::from(&b"helloworld"[..]);
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let world = hello.split_off(5);
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assert_eq!(hello, &b"hello"[..]);
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assert_eq!(world, &b"world"[..]);
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}
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#[test]
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#[should_panic]
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fn split_off_oob() {
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let mut hello = Bytes::from(&b"helloworld"[..]);
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hello.split_off(inline_cap() + 1);
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}
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#[test]
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fn split_off_uninitialized() {
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let mut bytes = BytesMut::with_capacity(1024);
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let other = bytes.split_off(128);
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assert_eq!(bytes.len(), 0);
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assert_eq!(bytes.capacity(), 128);
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assert_eq!(other.len(), 0);
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assert_eq!(other.capacity(), 896);
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}
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#[test]
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fn split_off_to_loop() {
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let s = b"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
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for i in 0..(s.len() + 1) {
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{
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let mut bytes = Bytes::from(&s[..]);
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let off = bytes.split_off(i);
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assert_eq!(i, bytes.len());
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let mut sum = Vec::new();
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sum.extend(&bytes);
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sum.extend(&off);
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assert_eq!(&s[..], &sum[..]);
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}
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{
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let mut bytes = BytesMut::from(&s[..]);
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let off = bytes.split_off(i);
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assert_eq!(i, bytes.len());
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let mut sum = Vec::new();
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sum.extend(&bytes);
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sum.extend(&off);
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assert_eq!(&s[..], &sum[..]);
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}
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{
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let mut bytes = Bytes::from(&s[..]);
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let off = bytes.split_to(i);
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assert_eq!(i, off.len());
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let mut sum = Vec::new();
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sum.extend(&off);
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sum.extend(&bytes);
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assert_eq!(&s[..], &sum[..]);
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}
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{
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let mut bytes = BytesMut::from(&s[..]);
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let off = bytes.split_to(i);
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assert_eq!(i, off.len());
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let mut sum = Vec::new();
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sum.extend(&off);
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sum.extend(&bytes);
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assert_eq!(&s[..], &sum[..]);
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}
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}
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}
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#[test]
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fn split_to_1() {
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// Inline
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let mut a = Bytes::from(SHORT);
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let b = a.split_to(4);
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assert_eq!(SHORT[4..], a);
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assert_eq!(SHORT[..4], b);
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// Allocated
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let mut a = Bytes::from(LONG);
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let b = a.split_to(4);
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assert_eq!(LONG[4..], a);
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assert_eq!(LONG[..4], b);
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let mut a = Bytes::from(LONG);
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let b = a.split_to(30);
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assert_eq!(LONG[30..], a);
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assert_eq!(LONG[..30], b);
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}
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#[test]
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fn split_to_2() {
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let mut a = Bytes::from(LONG);
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assert_eq!(LONG, a);
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let b = a.split_to(1);
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assert_eq!(LONG[1..], a);
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drop(b);
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}
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#[test]
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#[should_panic]
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fn split_to_oob() {
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let mut hello = Bytes::from(&b"helloworld"[..]);
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hello.split_to(inline_cap() + 1);
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}
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#[test]
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#[should_panic]
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fn split_to_oob_mut() {
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let mut hello = BytesMut::from(&b"helloworld"[..]);
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hello.split_to(inline_cap() + 1);
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}
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#[test]
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fn split_to_uninitialized() {
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let mut bytes = BytesMut::with_capacity(1024);
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let other = bytes.split_to(128);
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assert_eq!(bytes.len(), 0);
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assert_eq!(bytes.capacity(), 896);
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assert_eq!(other.len(), 0);
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assert_eq!(other.capacity(), 128);
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}
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#[test]
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fn split_off_to_at_gt_len() {
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fn make_bytes() -> Bytes {
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let mut bytes = BytesMut::with_capacity(100);
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bytes.put_slice(&[10, 20, 30, 40]);
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bytes.freeze()
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}
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use std::panic;
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make_bytes().split_to(4);
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make_bytes().split_off(4);
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assert!(panic::catch_unwind(move || {
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make_bytes().split_to(5);
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}).is_err());
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assert!(panic::catch_unwind(move || {
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make_bytes().split_off(5);
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}).is_err());
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}
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#[test]
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fn fns_defined_for_bytes_mut() {
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let mut bytes = BytesMut::from(&b"hello world"[..]);
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bytes.as_ptr();
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bytes.as_mut_ptr();
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// Iterator
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let v: Vec<u8> = bytes.iter().map(|b| *b).collect();
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assert_eq!(&v[..], bytes);
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}
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#[test]
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fn reserve_convert() {
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// Inline -> Vec
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let mut bytes = BytesMut::with_capacity(8);
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bytes.put("hello");
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bytes.reserve(40);
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assert_eq!(bytes.capacity(), 45);
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assert_eq!(bytes, "hello");
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// Inline -> Inline
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let mut bytes = BytesMut::with_capacity(inline_cap());
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bytes.put("abcdefghijkl");
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let a = bytes.split_to(10);
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bytes.reserve(inline_cap() - 3);
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assert_eq!(inline_cap(), bytes.capacity());
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assert_eq!(bytes, "kl");
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assert_eq!(a, "abcdefghij");
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// Vec -> Vec
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let mut bytes = BytesMut::from(LONG);
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bytes.reserve(64);
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assert_eq!(bytes.capacity(), LONG.len() + 64);
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// Arc -> Vec
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let mut bytes = BytesMut::from(LONG);
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let a = bytes.split_to(30);
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bytes.reserve(128);
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assert!(bytes.capacity() >= bytes.len() + 128);
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drop(a);
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}
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#[test]
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fn reserve_growth() {
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let mut bytes = BytesMut::with_capacity(64);
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bytes.put("hello world");
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let _ = bytes.take();
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bytes.reserve(65);
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assert_eq!(bytes.capacity(), 128);
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}
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#[test]
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fn reserve_allocates_at_least_original_capacity() {
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let mut bytes = BytesMut::with_capacity(128);
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for i in 0..120 {
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bytes.put(i as u8);
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}
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let _other = bytes.take();
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bytes.reserve(16);
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assert_eq!(bytes.capacity(), 128);
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}
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#[test]
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fn reserve_max_original_capacity_value() {
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const SIZE: usize = 128 * 1024;
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let mut bytes = BytesMut::with_capacity(SIZE);
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for _ in 0..SIZE {
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bytes.put(0u8);
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}
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let _other = bytes.take();
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bytes.reserve(16);
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assert_eq!(bytes.capacity(), 64 * 1024);
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}
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#[test]
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fn reserve_in_arc_unique_does_not_overallocate() {
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let mut bytes = BytesMut::with_capacity(1000);
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bytes.take();
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// now bytes is Arc and refcount == 1
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assert_eq!(1000, bytes.capacity());
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bytes.reserve(2001);
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assert_eq!(2001, bytes.capacity());
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}
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#[test]
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fn reserve_in_arc_unique_doubles() {
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let mut bytes = BytesMut::with_capacity(1000);
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bytes.take();
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// now bytes is Arc and refcount == 1
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assert_eq!(1000, bytes.capacity());
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bytes.reserve(1001);
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assert_eq!(2000, bytes.capacity());
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}
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#[test]
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fn reserve_in_arc_nonunique_does_not_overallocate() {
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let mut bytes = BytesMut::with_capacity(1000);
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let _copy = bytes.take();
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// now bytes is Arc and refcount == 2
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assert_eq!(1000, bytes.capacity());
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bytes.reserve(2001);
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assert_eq!(2001, bytes.capacity());
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}
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#[test]
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fn inline_storage() {
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let mut bytes = BytesMut::with_capacity(inline_cap());
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let zero = [0u8; 64];
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bytes.put(&zero[0..inline_cap()]);
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assert_eq!(*bytes, zero[0..inline_cap()]);
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}
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#[test]
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fn extend_mut() {
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let mut bytes = BytesMut::with_capacity(0);
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bytes.extend(LONG);
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assert_eq!(*bytes, LONG[..]);
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}
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#[test]
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fn extend_shr() {
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let mut bytes = Bytes::new();
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bytes.extend(LONG);
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assert_eq!(*bytes, LONG[..]);
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}
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#[test]
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fn extend_from_slice_mut() {
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for &i in &[3, 34] {
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let mut bytes = BytesMut::new();
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bytes.extend_from_slice(&LONG[..i]);
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bytes.extend_from_slice(&LONG[i..]);
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assert_eq!(LONG[..], *bytes);
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}
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}
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#[test]
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fn extend_from_slice_shr() {
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for &i in &[3, 34] {
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let mut bytes = Bytes::new();
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bytes.extend_from_slice(&LONG[..i]);
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bytes.extend_from_slice(&LONG[i..]);
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assert_eq!(LONG[..], *bytes);
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}
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}
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#[test]
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fn from_static() {
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let mut a = Bytes::from_static(b"ab");
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let b = a.split_off(1);
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assert_eq!(a, b"a"[..]);
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assert_eq!(b, b"b"[..]);
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}
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#[test]
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// Only run these tests on little endian systems. CI uses qemu for testing
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// little endian... and qemu doesn't really support threading all that well.
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#[cfg(target_endian = "little")]
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fn stress() {
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// Tests promoting a buffer from a vec -> shared in a concurrent situation
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use std::sync::{Arc, Barrier};
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use std::thread;
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const THREADS: usize = 8;
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const ITERS: usize = 1_000;
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for i in 0..ITERS {
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let data = [i as u8; 256];
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let buf = Arc::new(Bytes::from(&data[..]));
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let barrier = Arc::new(Barrier::new(THREADS));
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let mut joins = Vec::with_capacity(THREADS);
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for _ in 0..THREADS {
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let c = barrier.clone();
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let buf = buf.clone();
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joins.push(thread::spawn(move || {
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c.wait();
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let buf: Bytes = (*buf).clone();
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drop(buf);
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}));
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}
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for th in joins {
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th.join().unwrap();
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}
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assert_eq!(*buf, data[..]);
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}
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}
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#[test]
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fn partial_eq_bytesmut() {
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let bytes = Bytes::from(&b"The quick red fox"[..]);
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let bytesmut = BytesMut::from(&b"The quick red fox"[..]);
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assert!(bytes == bytesmut);
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assert!(bytesmut == bytes);
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let bytes2 = Bytes::from(&b"Jumped over the lazy brown dog"[..]);
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assert!(bytes2 != bytesmut);
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assert!(bytesmut != bytes2);
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}
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