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extern crate deflate;
extern crate flate2;
use std::io::{Write, Read};
use deflate::CompressionOptions;
fn get_test_file_data(name: &str) -> Vec<u8> {
use std::fs::File;
let mut input = Vec::new();
let mut f = File::open(name).unwrap();
f.read_to_end(&mut input).unwrap();
input
}
fn get_test_data() -> Vec<u8> {
use std::env;
let path = env::var("TEST_FILE").unwrap_or_else(|_| "tests/pg11.txt".to_string());
get_test_file_data(&path)
}
fn roundtrip(data: &[u8]) {
roundtrip_conf(data, CompressionOptions::default())
}
fn roundtrip_conf(data: &[u8], level: CompressionOptions) {
let compressed = deflate::deflate_bytes_zlib_conf(data, level);
println!("Compressed len: {}, level: {:?}", compressed.len(), level);
let decompressed = {
let mut d = flate2::read::ZlibDecoder::new(compressed.as_slice());
let mut out = Vec::new();
d.read_to_end(&mut out).unwrap();
out
};
assert!(decompressed.as_slice() == data);
}
// A test comparing the compression ratio of the library with flate2
#[test]
fn file_zlib_compare_output() {
use flate2::Compression;
let test_data = get_test_data();
let flate2_compressed = {
let mut e = flate2::write::ZlibEncoder::new(Vec::new(), Compression::best());
e.write_all(&test_data).unwrap();
e.finish().unwrap()
};
// {
// use std::fs::File;
// use std::io::Write;
// {
// let mut f = File::create("out.deflate").unwrap();
// f.write_all(&deflate_compressed).unwrap();
// }
// {
// let mut f = File::create("out.flate2").unwrap();
// f.write_all(&flate2_compressed).unwrap();
// }
// }
println!("flate2 len: {}", flate2_compressed.len(),);
roundtrip_conf(&test_data, CompressionOptions::high());
}
#[test]
fn block_type() {
let test_file = "tests/short.bin";
let test_data = get_test_file_data(test_file);
let compressed = deflate::deflate_bytes_zlib(&test_data);
assert_eq!(compressed.len(), 30);
roundtrip(b"test");
}
#[test]
fn issue_17() {
// This is window size + 1 bytes long which made the hash table
// slide when there was only the two end-bytes that don't need to be hashed left
// and triggered an assertion.
let data = vec![0; 65537];
roundtrip(&data);
}
#[test]
fn fast() {
let test_data = get_test_data();
roundtrip_conf(&test_data, CompressionOptions::fast());
}
#[test]
fn rle() {
use deflate::{deflate_bytes_conf, CompressionOptions};
let test_data = get_test_data();
let compressed = deflate_bytes_conf(&test_data, CompressionOptions::rle());
let decompressed = {
let mut d = flate2::read::DeflateDecoder::new(compressed.as_slice());
let mut out = Vec::new();
d.read_to_end(&mut out).unwrap();
out
};
println!("Input size: {}", test_data.len());
println!("Rle compressed len: {}", compressed.len());
assert!(test_data == decompressed);
}
#[test]
fn issue_26() {
use deflate::write::ZlibEncoder;
let fp = Vec::new();
let mut fp = ZlibEncoder::new( fp, CompressionOptions::default() );
fp.write( &[0] ).unwrap();
fp.flush().unwrap();
fp.write( &[0] ).unwrap();
fp.write( &[0, 0] ).unwrap();
}
#[cfg(feature = "gzip")]
#[test]
fn issue_26_gzip() {
use deflate::write::DeflateEncoder;
let fp = Vec::new();
let mut fp = DeflateEncoder::new( fp, CompressionOptions::default() );
fp.write( &[0] ).unwrap();
fp.flush().unwrap();
fp.write( &[0] ).unwrap();
fp.write( &[0, 0] ).unwrap();
}
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