mirror of https://github.com/dswd/zvault
96 lines
2.9 KiB
Rust
96 lines
2.9 KiB
Rust
extern crate chunking;
|
|
|
|
use chunking::*;
|
|
|
|
use std::io::Cursor;
|
|
|
|
|
|
fn random_data(seed: u64, size: usize) -> Vec<u8> {
|
|
assert_eq!(size % 4, 0);
|
|
let mut data = vec![0; size];
|
|
let a = 6364136223846793005;
|
|
let c = 1442695040888963407;
|
|
let mut v = seed;
|
|
for i in 0..size/4 {
|
|
v = v.wrapping_mul(a).wrapping_add(c);
|
|
data[4*i] = ((v >> 24) & 0xff) as u8;
|
|
data[4*i+1] = ((v >> 16) & 0xff) as u8;
|
|
data[4*i+2] = ((v >> 8) & 0xff) as u8;
|
|
data[4*i+3] = (v & 0xff) as u8;
|
|
}
|
|
data
|
|
}
|
|
|
|
fn test_chunking(chunker: &mut Chunker, data: &[u8], chunk_lens: Option<&[usize]>) -> usize {
|
|
let mut cursor = Cursor::new(&data);
|
|
let mut chunks = vec![];
|
|
let mut chunk = vec![];
|
|
while chunker.chunk(&mut cursor, &mut chunk).unwrap() == ChunkerStatus::Continue {
|
|
chunks.push(chunk);
|
|
chunk = vec![];
|
|
}
|
|
chunks.push(chunk);
|
|
let mut pos = 0;
|
|
for chunk in &chunks {
|
|
assert!(pos+chunk.len() <= data.len());
|
|
assert_eq!(&data[pos..pos+chunk.len()], chunk as &[u8]);
|
|
pos += chunk.len();
|
|
}
|
|
if let Some(chunk_lens) = chunk_lens {
|
|
//assert_eq!(chunk_lens.len(), chunks.len());
|
|
for (i, chunk) in chunks.iter().enumerate() {
|
|
assert_eq!(chunk.len(), chunk_lens[i]);
|
|
}
|
|
}
|
|
assert_eq!(pos, data.len());
|
|
chunks.len()
|
|
}
|
|
|
|
|
|
#[test]
|
|
fn test_fixed() {
|
|
let data = random_data(0, 10*1024*1024);
|
|
for n in &[1usize,2,4,8,16,32,64,128,256,512,1024] {
|
|
let mut chunker = FixedChunker::new(1024*n);
|
|
let len = test_chunking(&mut chunker, &data, None);
|
|
assert!(len >= data.len()/n/1024/4);
|
|
assert!(len <= data.len()/n/1024*4);
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_ae() {
|
|
let data = random_data(0, 10*1024*1024);
|
|
for n in &[1usize,2,4,8,16,32,64,128,256,512,1024] {
|
|
let mut chunker = AeChunker::new(1024*n);
|
|
let len = test_chunking(&mut chunker, &data, None);
|
|
assert!(len >= data.len()/n/1024/4);
|
|
assert!(len <= data.len()/n/1024*4);
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_rabin() {
|
|
let data = random_data(0, 10*1024*1024);
|
|
for n in &[1usize,2,4,8,16,32,64,128,256,512,1024] {
|
|
let mut chunker = RabinChunker::new(1024*n, 0);
|
|
let len = test_chunking(&mut chunker, &data, None);
|
|
assert!(len >= data.len()/n/1024/4);
|
|
assert!(len <= data.len()/n/1024*4);
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_fastcdc() {
|
|
let data = random_data(0, 10*1024*1024);
|
|
for n in &[1usize,2,4,8,16,32,64,128,256,512,1024] {
|
|
let mut chunker = FastCdcChunker::new(1024*n, 0, true);
|
|
let len = test_chunking(&mut chunker, &data, None);
|
|
assert!(len >= data.len()/n/1024/4);
|
|
assert!(len <= data.len()/n/1024*4);
|
|
}
|
|
test_chunking(&mut FastCdcChunker::new(8192, 0, true), &random_data(0, 128*1024),
|
|
Some(&[8712, 8018, 2847, 9157, 8997, 8581, 8867, 5422, 5412, 9478,
|
|
11553, 9206, 4606, 8529, 3821, 11342, 6524]));
|
|
}
|