// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package pgzip
import (
"bytes"
oldgz "compress/gzip"
"crypto/rand"
"io"
"io/ioutil"
"os"
"runtime/pprof"
"strings"
"testing"
"time"
kpgzip "github.com/klauspost/compress/gzip"
)
type gunzipTest struct {
name string
desc string
raw string
gzip []byte
err error
}
var gunzipTests = []gunzipTest{
{ // has 1 empty fixed-huffman block
"empty.txt",
"empty.txt",
"",
[]byte{
0x1f, 0x8b, 0x08, 0x08, 0xf7, 0x5e, 0x14, 0x4a,
0x00, 0x03, 0x65, 0x6d, 0x70, 0x74, 0x79, 0x2e,
0x74, 0x78, 0x74, 0x00, 0x03, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
},
nil,
},
{ // has 1 non-empty fixed huffman block
"hello.txt",
"hello.txt",
"hello world\n",
[]byte{
0x1f, 0x8b, 0x08, 0x08, 0xc8, 0x58, 0x13, 0x4a,
0x00, 0x03, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x2e,
0x74, 0x78, 0x74, 0x00, 0xcb, 0x48, 0xcd, 0xc9,
0xc9, 0x57, 0x28, 0xcf, 0x2f, 0xca, 0x49, 0xe1,
0x02, 0x00, 0x2d, 0x3b, 0x08, 0xaf, 0x0c, 0x00,
0x00, 0x00,
},
nil,
},
{ // concatenation
"hello.txt",
"hello.txt x2",
"hello world\n" +
"hello world\n",
[]byte{
0x1f, 0x8b, 0x08, 0x08, 0xc8, 0x58, 0x13, 0x4a,
0x00, 0x03, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x2e,
0x74, 0x78, 0x74, 0x00, 0xcb, 0x48, 0xcd, 0xc9,
0xc9, 0x57, 0x28, 0xcf, 0x2f, 0xca, 0x49, 0xe1,
0x02, 0x00, 0x2d, 0x3b, 0x08, 0xaf, 0x0c, 0x00,
0x00, 0x00,
0x1f, 0x8b, 0x08, 0x08, 0xc8, 0x58, 0x13, 0x4a,
0x00, 0x03, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x2e,
0x74, 0x78, 0x74, 0x00, 0xcb, 0x48, 0xcd, 0xc9,
0xc9, 0x57, 0x28, 0xcf, 0x2f, 0xca, 0x49, 0xe1,
0x02, 0x00, 0x2d, 0x3b, 0x08, 0xaf, 0x0c, 0x00,
0x00, 0x00,
},
nil,
},
{ // has a fixed huffman block with some length-distance pairs
"shesells.txt",
"shesells.txt",
"she sells seashells by the seashore\n",
[]byte{
0x1f, 0x8b, 0x08, 0x08, 0x72, 0x66, 0x8b, 0x4a,
0x00, 0x03, 0x73, 0x68, 0x65, 0x73, 0x65, 0x6c,
0x6c, 0x73, 0x2e, 0x74, 0x78, 0x74, 0x00, 0x2b,
0xce, 0x48, 0x55, 0x28, 0x4e, 0xcd, 0xc9, 0x29,
0x06, 0x92, 0x89, 0xc5, 0x19, 0x60, 0x56, 0x52,
0xa5, 0x42, 0x09, 0x58, 0x18, 0x28, 0x90, 0x5f,
0x94, 0xca, 0x05, 0x00, 0x76, 0xb0, 0x3b, 0xeb,
0x24, 0x00, 0x00, 0x00,
},
nil,
},
{ // has dynamic huffman blocks
"gettysburg",
"gettysburg",
" Four score and seven years ago our fathers brought forth on\n" +
"this continent, a new nation, conceived in Liberty, and dedicated\n" +
"to the proposition that all men are created equal.\n" +
" Now we are engaged in a great Civil War, testing whether that\n" +
"nation, or any nation so conceived and so dedicated, can long\n" +
"endure.\n" +
" We are met on a great battle-field of that war.\n" +
" We have come to dedicate a portion of that field, as a final\n" +
"resting place for those who here gave their lives that that\n" +
"nation might live. It is altogether fitting and proper that\n" +
"we should do this.\n" +
" But, in a larger sense, we can not dedicate — we can not\n" +
"consecrate — we can not hallow — this ground.\n" +
" The brave men, living and dead, who struggled here, have\n" +
"consecrated it, far above our poor power to add or detract.\n" +
"The world will little note, nor long remember what we say here,\n" +
"but it can never forget what they did here.\n" +
" It is for us the living, rather, to be dedicated here to the\n" +
"unfinished work which they who fought here have thus far so\n" +
"nobly advanced. It is rather for us to be here dedicated to\n" +
"the great task remaining before us — that from these honored\n" +
"dead we take increased devotion to that cause for which they\n" +
"gave the last full measure of devotion —\n" +
" that we here highly resolve that these dead shall not have\n" +
"died in vain — that this nation, under God, shall have a new\n" +
"birth of freedom — and that government of the people, by the\n" +
"people, for the people, shall not perish from this earth.\n" +
"\n" +
"Abraham Lincoln, November 19, 1863, Gettysburg, Pennsylvania\n",
[]byte{
0x1f, 0x8b, 0x08, 0x08, 0xd1, 0x12, 0x2b, 0x4a,
0x00, 0x03, 0x67, 0x65, 0x74, 0x74, 0x79, 0x73,
0x62, 0x75, 0x72, 0x67, 0x00, 0x65, 0x54, 0xcd,
0x6e, 0xd4, 0x30, 0x10, 0xbe, 0xfb, 0x29, 0xe6,
0x01, 0x42, 0xa5, 0x0a, 0x09, 0xc1, 0x11, 0x90,
0x40, 0x48, 0xa8, 0xe2, 0x80, 0xd4, 0xf3, 0x24,
0x9e, 0x24, 0x56, 0xbd, 0x9e, 0xc5, 0x76, 0x76,
0x95, 0x1b, 0x0f, 0xc1, 0x13, 0xf2, 0x24, 0x7c,
0x63, 0x77, 0x9b, 0x4a, 0x5c, 0xaa, 0x6e, 0x6c,
0xcf, 0x7c, 0x7f, 0x33, 0x44, 0x5f, 0x74, 0xcb,
0x54, 0x26, 0xcd, 0x42, 0x9c, 0x3c, 0x15, 0xb9,
0x48, 0xa2, 0x5d, 0x38, 0x17, 0xe2, 0x45, 0xc9,
0x4e, 0x67, 0xae, 0xab, 0xe0, 0xf7, 0x98, 0x75,
0x5b, 0xd6, 0x4a, 0xb3, 0xe6, 0xba, 0x92, 0x26,
0x57, 0xd7, 0x50, 0x68, 0xd2, 0x54, 0x43, 0x92,
0x54, 0x07, 0x62, 0x4a, 0x72, 0xa5, 0xc4, 0x35,
0x68, 0x1a, 0xec, 0x60, 0x92, 0x70, 0x11, 0x4f,
0x21, 0xd1, 0xf7, 0x30, 0x4a, 0xae, 0xfb, 0xd0,
0x9a, 0x78, 0xf1, 0x61, 0xe2, 0x2a, 0xde, 0x55,
0x25, 0xd4, 0xa6, 0x73, 0xd6, 0xb3, 0x96, 0x60,
0xef, 0xf0, 0x9b, 0x2b, 0x71, 0x8c, 0x74, 0x02,
0x10, 0x06, 0xac, 0x29, 0x8b, 0xdd, 0x25, 0xf9,
0xb5, 0x71, 0xbc, 0x73, 0x44, 0x0f, 0x7a, 0xa5,
0xab, 0xb4, 0x33, 0x49, 0x0b, 0x2f, 0xbd, 0x03,
0xd3, 0x62, 0x17, 0xe9, 0x73, 0xb8, 0x84, 0x48,
0x8f, 0x9c, 0x07, 0xaa, 0x52, 0x00, 0x6d, 0xa1,
0xeb, 0x2a, 0xc6, 0xa0, 0x95, 0x76, 0x37, 0x78,
0x9a, 0x81, 0x65, 0x7f, 0x46, 0x4b, 0x45, 0x5f,
0xe1, 0x6d, 0x42, 0xe8, 0x01, 0x13, 0x5c, 0x38,
0x51, 0xd4, 0xb4, 0x38, 0x49, 0x7e, 0xcb, 0x62,
0x28, 0x1e, 0x3b, 0x82, 0x93, 0x54, 0x48, 0xf1,
0xd2, 0x7d, 0xe4, 0x5a, 0xa3, 0xbc, 0x99, 0x83,
0x44, 0x4f, 0x3a, 0x77, 0x36, 0x57, 0xce, 0xcf,
0x2f, 0x56, 0xbe, 0x80, 0x90, 0x9e, 0x84, 0xea,
0x51, 0x1f, 0x8f, 0xcf, 0x90, 0xd4, 0x60, 0xdc,
0x5e, 0xb4, 0xf7, 0x10, 0x0b, 0x26, 0xe0, 0xff,
0xc4, 0xd1, 0xe5, 0x67, 0x2e, 0xe7, 0xc8, 0x93,
0x98, 0x05, 0xb8, 0xa8, 0x45, 0xc0, 0x4d, 0x09,
0xdc, 0x84, 0x16, 0x2b, 0x0d, 0x9a, 0x21, 0x53,
0x04, 0x8b, 0xd2, 0x0b, 0xbd, 0xa2, 0x4c, 0xa7,
0x60, 0xee, 0xd9, 0xe1, 0x1d, 0xd1, 0xb7, 0x4a,
0x30, 0x8f, 0x63, 0xd5, 0xa5, 0x8b, 0x33, 0x87,
0xda, 0x1a, 0x18, 0x79, 0xf3, 0xe3, 0xa6, 0x17,
0x94, 0x2e, 0xab, 0x6e, 0xa0, 0xe3, 0xcd, 0xac,
0x50, 0x8c, 0xca, 0xa7, 0x0d, 0x76, 0x37, 0xd1,
0x23, 0xe7, 0x05, 0x57, 0x8b, 0xa4, 0x22, 0x83,
0xd9, 0x62, 0x52, 0x25, 0xad, 0x07, 0xbb, 0xbf,
0xbf, 0xff, 0xbc, 0xfa, 0xee, 0x20, 0x73, 0x91,
0x29, 0xff, 0x7f, 0x02, 0x71, 0x62, 0x84, 0xb5,
0xf6, 0xb5, 0x25, 0x6b, 0x41, 0xde, 0x92, 0xb7,
0x76, 0x3f, 0x91, 0x91, 0x31, 0x1b, 0x41, 0x84,
0x62, 0x30, 0x0a, 0x37, 0xa4, 0x5e, 0x18, 0x3a,
0x99, 0x08, 0xa5, 0xe6, 0x6d, 0x59, 0x22, 0xec,
0x33, 0x39, 0x86, 0x26, 0xf5, 0xab, 0x66, 0xc8,
0x08, 0x20, 0xcf, 0x0c, 0xd7, 0x47, 0x45, 0x21,
0x0b, 0xf6, 0x59, 0xd5, 0xfe, 0x5c, 0x8d, 0xaa,
0x12, 0x7b, 0x6f, 0xa1, 0xf0, 0x52, 0x33, 0x4f,
0xf5, 0xce, 0x59, 0xd3, 0xab, 0x66, 0x10, 0xbf,
0x06, 0xc4, 0x31, 0x06, 0x73, 0xd6, 0x80, 0xa2,
0x78, 0xc2, 0x45, 0xcb, 0x03, 0x65, 0x39, 0xc9,
0x09, 0xd1, 0x06, 0x04, 0x33, 0x1a, 0x5a, 0xf1,
0xde, 0x01, 0xb8, 0x71, 0x83, 0xc4, 0xb5, 0xb3,
0xc3, 0x54, 0x65, 0x33, 0x0d, 0x5a, 0xf7, 0x9b,
0x90, 0x7c, 0x27, 0x1f, 0x3a, 0x58, 0xa3, 0xd8,
0xfd, 0x30, 0x5f, 0xb7, 0xd2, 0x66, 0xa2, 0x93,
0x1c, 0x28, 0xb7, 0xe9, 0x1b, 0x0c, 0xe1, 0x28,
0x47, 0x26, 0xbb, 0xe9, 0x7d, 0x7e, 0xdc, 0x96,
0x10, 0x92, 0x50, 0x56, 0x7c, 0x06, 0xe2, 0x27,
0xb4, 0x08, 0xd3, 0xda, 0x7b, 0x98, 0x34, 0x73,
0x9f, 0xdb, 0xf6, 0x62, 0xed, 0x31, 0x41, 0x13,
0xd3, 0xa2, 0xa8, 0x4b, 0x3a, 0xc6, 0x1d, 0xe4,
0x2f, 0x8c, 0xf8, 0xfb, 0x97, 0x64, 0xf4, 0xb6,
0x2f, 0x80, 0x5a, 0xf3, 0x56, 0xe0, 0x40, 0x50,
0xd5, 0x19, 0xd0, 0x1e, 0xfc, 0xca, 0xe5, 0xc9,
0xd4, 0x60, 0x00, 0x81, 0x2e, 0xa3, 0xcc, 0xb6,
0x52, 0xf0, 0xb4, 0xdb, 0x69, 0x99, 0xce, 0x7a,
0x32, 0x4c, 0x08, 0xed, 0xaa, 0x10, 0x10, 0xe3,
0x6f, 0xee, 0x99, 0x68, 0x95, 0x9f, 0x04, 0x71,
0xb2, 0x49, 0x2f, 0x62, 0xa6, 0x5e, 0xb4, 0xef,
0x02, 0xed, 0x4f, 0x27, 0xde, 0x4a, 0x0f, 0xfd,
0xc1, 0xcc, 0xdd, 0x02, 0x8f, 0x08, 0x16, 0x54,
0xdf, 0xda, 0xca, 0xe0, 0x82, 0xf1, 0xb4, 0x31,
0x7a, 0xa9, 0x81, 0xfe, 0x90, 0xb7, 0x3e, 0xdb,
0xd3, 0x35, 0xc0, 0x20, 0x80, 0x33, 0x46, 0x4a,
0x63, 0xab, 0xd1, 0x0d, 0x29, 0xd2, 0xe2, 0x84,
0xb8, 0xdb, 0xfa, 0xe9, 0x89, 0x44, 0x86, 0x7c,
0xe8, 0x0b, 0xe6, 0x02, 0x6a, 0x07, 0x9b, 0x96,
0xd0, 0xdb, 0x2e, 0x41, 0x4c, 0xa1, 0xd5, 0x57,
0x45, 0x14, 0xfb, 0xe3, 0xa6, 0x72, 0x5b, 0x87,
0x6e, 0x0c, 0x6d, 0x5b, 0xce, 0xe0, 0x2f, 0xe2,
0x21, 0x81, 0x95, 0xb0, 0xe8, 0xb6, 0x32, 0x0b,
0xb2, 0x98, 0x13, 0x52, 0x5d, 0xfb, 0xec, 0x63,
0x17, 0x8a, 0x9e, 0x23, 0x22, 0x36, 0xee, 0xcd,
0xda, 0xdb, 0xcf, 0x3e, 0xf1, 0xc7, 0xf1, 0x01,
0x12, 0x93, 0x0a, 0xeb, 0x6f, 0xf2, 0x02, 0x15,
0x96, 0x77, 0x5d, 0xef, 0x9c, 0xfb, 0x88, 0x91,
0x59, 0xf9, 0x84, 0xdd, 0x9b, 0x26, 0x8d, 0x80,
0xf9, 0x80, 0x66, 0x2d, 0xac, 0xf7, 0x1f, 0x06,
0xba, 0x7f, 0xff, 0xee, 0xed, 0x40, 0x5f, 0xa5,
0xd6, 0xbd, 0x8c, 0x5b, 0x46, 0xd2, 0x7e, 0x48,
0x4a, 0x65, 0x8f, 0x08, 0x42, 0x60, 0xf7, 0x0f,
0xb9, 0x16, 0x0b, 0x0c, 0x1a, 0x06, 0x00, 0x00,
},
nil,
},
{ // has 1 non-empty fixed huffman block then garbage
"hello.txt",
"hello.txt + garbage",
"hello world\n",
[]byte{
0x1f, 0x8b, 0x08, 0x08, 0xc8, 0x58, 0x13, 0x4a,
0x00, 0x03, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x2e,
0x74, 0x78, 0x74, 0x00, 0xcb, 0x48, 0xcd, 0xc9,
0xc9, 0x57, 0x28, 0xcf, 0x2f, 0xca, 0x49, 0xe1,
0x02, 0x00, 0x2d, 0x3b, 0x08, 0xaf, 0x0c, 0x00,
0x00, 0x00, 'g', 'a', 'r', 'b', 'a', 'g', 'e', '!', '!', '!',
},
ErrHeader,
},
{ // has 1 non-empty fixed huffman block not enough header
"hello.txt",
"hello.txt + garbage",
"hello world\n",
[]byte{
0x1f, 0x8b, 0x08, 0x08, 0xc8, 0x58, 0x13, 0x4a,
0x00, 0x03, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x2e,
0x74, 0x78, 0x74, 0x00, 0xcb, 0x48, 0xcd, 0xc9,
0xc9, 0x57, 0x28, 0xcf, 0x2f, 0xca, 0x49, 0xe1,
0x02, 0x00, 0x2d, 0x3b, 0x08, 0xaf, 0x0c, 0x00,
0x00, 0x00, gzipID1,
},
io.ErrUnexpectedEOF,
},
{ // has 1 non-empty fixed huffman block but corrupt checksum
"hello.txt",
"hello.txt + corrupt checksum",
"hello world\n",
[]byte{
0x1f, 0x8b, 0x08, 0x08, 0xc8, 0x58, 0x13, 0x4a,
0x00, 0x03, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x2e,
0x74, 0x78, 0x74, 0x00, 0xcb, 0x48, 0xcd, 0xc9,
0xc9, 0x57, 0x28, 0xcf, 0x2f, 0xca, 0x49, 0xe1,
0x02, 0x00, 0xff, 0xff, 0xff, 0xff, 0x0c, 0x00,
0x00, 0x00,
},
ErrChecksum,
},
{ // has 1 non-empty fixed huffman block but corrupt size
"hello.txt",
"hello.txt + corrupt size",
"hello world\n",
[]byte{
0x1f, 0x8b, 0x08, 0x08, 0xc8, 0x58, 0x13, 0x4a,
0x00, 0x03, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x2e,
0x74, 0x78, 0x74, 0x00, 0xcb, 0x48, 0xcd, 0xc9,
0xc9, 0x57, 0x28, 0xcf, 0x2f, 0xca, 0x49, 0xe1,
0x02, 0x00, 0x2d, 0x3b, 0x08, 0xaf, 0xff, 0x00,
0x00, 0x00,
},
ErrChecksum,
},
}
func TestDecompressor(t *testing.T) {
b := new(bytes.Buffer)
for _, tt := range gunzipTests {
in := bytes.NewReader(tt.gzip)
gzip, err := NewReader(in)
if err != nil {
t.Errorf("%s: NewReader: %s", tt.name, err)
continue
}
defer gzip.Close()
if tt.name != gzip.Name {
t.Errorf("%s: got name %s", tt.name, gzip.Name)
}
b.Reset()
n, err := io.Copy(b, gzip)
if err != tt.err {
t.Errorf("%s: io.Copy: %v want %v", tt.name, err, tt.err)
}
s := b.String()
if s != tt.raw {
t.Errorf("%s: got %d-byte %q want %d-byte %q", tt.name, n, s, len(tt.raw), tt.raw)
}
// Test Reader Reset.
in = bytes.NewReader(tt.gzip)
err = gzip.Reset(in)
if err != nil {
t.Errorf("%s: Reset: %s", tt.name, err)
continue
}
if tt.name != gzip.Name {
t.Errorf("%s: got name %s", tt.name, gzip.Name)
}
b.Reset()
n, err = io.Copy(b, gzip)
if err != tt.err {
t.Errorf("%s: io.Copy: %v want %v", tt.name, err, tt.err)
}
s = b.String()
if s != tt.raw {
t.Errorf("%s: got %d-byte %q want %d-byte %q", tt.name, n, s, len(tt.raw), tt.raw)
}
}
}
func TestDecompressorReset(t *testing.T) {
b := new(bytes.Buffer)
var gzip *Reader
for _, tt := range gunzipTests {
in := bytes.NewReader(tt.gzip)
if gzip == nil {
var err error
gzip, err = NewReader(in)
if err != nil {
t.Fatalf("NewReader: %s", err)
}
defer gzip.Close()
} else {
err := gzip.Reset(in)
if err != nil {
t.Errorf("%s: Reset: %s", tt.name, err)
continue
}
}
if tt.name != gzip.Name {
t.Errorf("%s: got name %s", tt.name, gzip.Name)
}
b.Reset()
n, err := io.Copy(b, gzip)
if err != tt.err {
t.Errorf("%s: io.Copy: %v want %v", tt.name, err, tt.err)
}
s := b.String()
if s != tt.raw {
t.Errorf("%s: got %d-byte %q want %d-byte %q", tt.name, n, s, len(tt.raw), tt.raw)
}
// Test Reader Reset.
in = bytes.NewReader(tt.gzip)
err = gzip.Reset(in)
if err != nil {
t.Errorf("%s: Reset: %s", tt.name, err)
continue
}
if tt.name != gzip.Name {
t.Errorf("%s: got name %s", tt.name, gzip.Name)
}
b.Reset()
n, err = io.Copy(b, gzip)
if err != tt.err {
t.Errorf("%s: io.Copy: %v want %v", tt.name, err, tt.err)
}
s = b.String()
if s != tt.raw {
t.Errorf("%s: got %d-byte %q want %d-byte %q", tt.name, n, s, len(tt.raw), tt.raw)
}
}
}
func TestDecompressorResetNoRead(t *testing.T) {
done := make(chan struct{})
defer close(done)
go func() {
select {
// Typical runtime is 2-3s, so we add an order of magnitude.
case <-time.After(30 * time.Second):
pprof.Lookup("goroutine").WriteTo(os.Stdout, 1)
case <-done:
}
}()
in, err := ioutil.ReadFile("testdata/bigempty.gz")
if err != nil {
t.Fatal(err)
}
gz, err := NewReader(bytes.NewBuffer(in))
if err != nil {
t.Fatal(err)
}
for i := 0; i < 100; i++ {
if testing.Short() && i > 10 {
break
}
err := gz.Reset(bytes.NewBuffer(in))
if err != nil {
t.Fatal(i, err)
}
// Read 100KB, ignore the rest
lr := io.LimitedReader{N: 100 << 10, R: gz}
_, err = io.Copy(ioutil.Discard, &lr)
if err != nil {
t.Fatal(i, err)
}
}
}
func TestIssue6550(t *testing.T) {
f, err := os.Open("testdata/issue6550.gz")
if err != nil {
t.Fatal(err)
}
gzip, err := NewReader(f)
if err != nil {
t.Fatalf("NewReader(testdata/issue6550.gz): %v", err)
}
defer gzip.Close()
done := make(chan bool, 1)
go func() {
_, err := io.Copy(ioutil.Discard, gzip)
if err == nil {
t.Errorf("Copy succeeded")
} else {
t.Logf("Copy failed (correctly): %v", err)
}
done <- true
}()
select {
case <-time.After(1 * time.Second):
t.Errorf("Copy hung")
case <-done:
// ok
}
}
func TestInitialReset(t *testing.T) {
var r Reader
if err := r.Reset(bytes.NewReader(gunzipTests[1].gzip)); err != nil {
t.Error(err)
}
var buf bytes.Buffer
if _, err := io.Copy(&buf, &r); err != nil {
t.Error(err)
}
if s := buf.String(); s != gunzipTests[1].raw {
t.Errorf("got %q want %q", s, gunzipTests[1].raw)
}
}
func TestMultistreamFalse(t *testing.T) {
// Find concatenation test.
var tt gunzipTest
for _, tt = range gunzipTests {
if strings.HasSuffix(tt.desc, " x2") {
goto Found
}
}
t.Fatal("cannot find hello.txt x2 in gunzip tests")
Found:
br := bytes.NewReader(tt.gzip)
var r Reader
if err := r.Reset(br); err != nil {
t.Fatalf("first reset: %v", err)
}
// Expect two streams with "hello world\n", then real EOF.
const hello = "hello world\n"
r.Multistream(false)
data, err := ioutil.ReadAll(&r)
if string(data) != hello || err != nil {
t.Fatalf("first stream = %q, %v, want %q, %v", string(data), err, hello, nil)
}
if err := r.Reset(br); err != nil {
t.Fatalf("second reset: %v", err)
}
r.Multistream(false)
data, err = ioutil.ReadAll(&r)
if string(data) != hello || err != nil {
t.Fatalf("second stream = %q, %v, want %q, %v", string(data), err, hello, nil)
}
if err := r.Reset(br); err != io.EOF {
t.Fatalf("third reset: err=%v, want io.EOF", err)
}
}
func TestWriteTo(t *testing.T) {
input := make([]byte, 100000)
n, err := rand.Read(input)
if err != nil {
t.Fatal(err)
}
if n != len(input) {
t.Fatal("did not fill buffer")
}
compressed := &bytes.Buffer{}
// Do it twice to test MultiStream functionality
for i := 0; i < 2; i++ {
w, err := NewWriterLevel(compressed, -2)
if err != nil {
t.Fatal(err)
}
n, err = w.Write(input)
if err != nil {
t.Fatal(err)
}
if n != len(input) {
t.Fatal("did not fill buffer")
}
w.Close()
}
input = append(input, input...)
buf := compressed.Bytes()
dec, err := NewReader(bytes.NewBuffer(buf))
if err != nil {
t.Fatal(err)
}
// ReadAll does not use WriteTo, but we wrap it in a NopCloser to be sure.
readall, err := ioutil.ReadAll(ioutil.NopCloser(dec))
if err != nil {
t.Fatal(err)
}
if len(readall) != len(input) {
t.Fatal("did not decompress everything")
}
if bytes.Compare(readall, input) != 0 {
t.Fatal("output did not match input")
}
dec, err = NewReader(bytes.NewBuffer(buf))
if err != nil {
t.Fatal(err)
}
wtbuf := &bytes.Buffer{}
written, err := dec.WriteTo(wtbuf)
if err != nil {
t.Fatal(err)
}
if written != int64(len(input)) {
t.Error("Returned length did not match, expected", len(input), "got", written)
}
if wtbuf.Len() != len(input) {
t.Error("Actual Length did not match, expected", len(input), "got", wtbuf.Len())
}
if bytes.Compare(wtbuf.Bytes(), input) != 0 {
t.Fatal("output did not match input")
}
}
func BenchmarkGunzipCopy(b *testing.B) {
dat, _ := ioutil.ReadFile("testdata/test.json")
dat = append(dat, dat...)
dat = append(dat, dat...)
dat = append(dat, dat...)
dat = append(dat, dat...)
dat = append(dat, dat...)
dst := &bytes.Buffer{}
w, _ := NewWriterLevel(dst, 1)
_, err := w.Write(dat)
if err != nil {
b.Fatal(err)
}
w.Close()
input := dst.Bytes()
r, err := NewReader(bytes.NewBuffer(input))
b.SetBytes(int64(len(dat)))
b.ResetTimer()
for n := 0; n < b.N; n++ {
err = r.Reset(bytes.NewBuffer(input))
if err != nil {
b.Fatal(err)
}
_, err = io.Copy(ioutil.Discard, r)
if err != nil {
b.Fatal(err)
}
}
}
func BenchmarkGunzipReadAll(b *testing.B) {
dat, _ := ioutil.ReadFile("testdata/test.json")
dat = append(dat, dat...)
dat = append(dat, dat...)
dat = append(dat, dat...)
dat = append(dat, dat...)
dat = append(dat, dat...)
dst := &bytes.Buffer{}
w, _ := NewWriterLevel(dst, 1)
_, err := w.Write(dat)
if err != nil {
b.Fatal(err)
}
w.Close()
input := dst.Bytes()
r, err := NewReader(bytes.NewBuffer(input))
b.SetBytes(int64(len(dat)))
b.ResetTimer()
for n := 0; n < b.N; n++ {
err = r.Reset(bytes.NewBuffer(input))
if err != nil {
b.Fatal(err)
}
_, err = ioutil.ReadAll(ioutil.NopCloser(r))
if err != nil {
b.Fatal(err)
}
}
}
func BenchmarkGunzipStdLib(b *testing.B) {
dat, _ := ioutil.ReadFile("testdata/test.json")
dat = append(dat, dat...)
dat = append(dat, dat...)
dat = append(dat, dat...)
dat = append(dat, dat...)
dat = append(dat, dat...)
dst := &bytes.Buffer{}
w, _ := NewWriterLevel(dst, 1)
_, err := w.Write(dat)
if err != nil {
b.Fatal(err)
}
w.Close()
input := dst.Bytes()
r, err := oldgz.NewReader(bytes.NewBuffer(input))
b.SetBytes(int64(len(dat)))
b.ResetTimer()
for n := 0; n < b.N; n++ {
err = r.Reset(bytes.NewBuffer(input))
if err != nil {
b.Fatal(err)
}
_, err = io.Copy(ioutil.Discard, r)
if err != nil {
b.Fatal(err)
}
}
}
func BenchmarkGunzipFlate(b *testing.B) {
dat, _ := ioutil.ReadFile("testdata/test.json")
dat = append(dat, dat...)
dat = append(dat, dat...)
dat = append(dat, dat...)
dat = append(dat, dat...)
dat = append(dat, dat...)
dst := &bytes.Buffer{}
w, _ := NewWriterLevel(dst, 1)
_, err := w.Write(dat)
if err != nil {
b.Fatal(err)
}
w.Close()
input := dst.Bytes()
r, err := kpgzip.NewReader(bytes.NewBuffer(input))
b.SetBytes(int64(len(dat)))
b.ResetTimer()
for n := 0; n < b.N; n++ {
err = r.Reset(bytes.NewBuffer(input))
if err != nil {
b.Fatal(err)
}
_, err = io.Copy(ioutil.Discard, r)
if err != nil {
b.Fatal(err)
}
}
}
func TestTruncatedGunzip(t *testing.T) {
in := []byte(strings.Repeat("ASDFASDFASDFASDFASDF", 1000))
var buf bytes.Buffer
enc := kpgzip.NewWriter(&buf)
_, err := enc.Write(in)
if err != nil {
t.Fatal(err)
}
enc.Close()
testdata := buf.Bytes()
for i := 5; i < len(testdata); i += 10 {
timer := time.NewTimer(time.Second)
done := make(chan struct{})
fail := make(chan struct{})
go func() {
r, err := NewReader(bytes.NewBuffer(testdata[:i]))
if err == nil {
b, err := ioutil.ReadAll(r)
if err == nil && !bytes.Equal(testdata[:i], b) {
close(fail)
}
}
close(done)
}()
select {
case <-timer.C:
t.Fatal("Timeout decoding")
case <-fail:
t.Fatal("No error, but mismatch")
case <-done:
timer.Stop()
}
}
}
func TestTruncatedGunzipBlocks(t *testing.T) {
var in = make([]byte, 512*10)
rand.Read(in)
var buf bytes.Buffer
for i := 0; i < len(in); i += 512 {
enc, _ := kpgzip.NewWriterLevel(&buf, 0)
_, err := enc.Write(in[:i])
if err != nil {
t.Fatal(err)
}
enc.Close()
timer := time.NewTimer(time.Second)
done := make(chan struct{})
fail := make(chan struct{})
go func() {
r, err := NewReaderN(&buf, 512, 10)
if err == nil {
b, err := ioutil.ReadAll(r)
if err == nil && !bytes.Equal(b, in[:i]) {
close(fail)
}
}
close(done)
}()
select {
case <-timer.C:
t.Fatal("Timeout decoding")
case <-fail:
t.Fatal("No error, but mismatch")
case <-done:
timer.Stop()
}
}
}