179 lines
3.3 KiB
Go
179 lines
3.3 KiB
Go
// 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 zlib
|
|
|
|
import (
|
|
"bytes"
|
|
"io"
|
|
"testing"
|
|
)
|
|
|
|
type zlibTest struct {
|
|
desc string
|
|
raw string
|
|
compressed []byte
|
|
dict []byte
|
|
err error
|
|
}
|
|
|
|
// Compare-to-golden test data was generated by the ZLIB example program at
|
|
// https://www.zlib.net/zpipe.c
|
|
|
|
var zlibTests = []zlibTest{
|
|
{
|
|
"truncated empty",
|
|
"",
|
|
[]byte{},
|
|
nil,
|
|
io.ErrUnexpectedEOF,
|
|
},
|
|
{
|
|
"truncated dict",
|
|
"",
|
|
[]byte{0x78, 0xbb},
|
|
[]byte{0x00},
|
|
io.ErrUnexpectedEOF,
|
|
},
|
|
{
|
|
"truncated checksum",
|
|
"",
|
|
[]byte{0x78, 0xbb, 0x00, 0x01, 0x00, 0x01, 0xca, 0x48,
|
|
0xcd, 0xc9, 0xc9, 0xd7, 0x51, 0x28, 0xcf, 0x2f,
|
|
0xca, 0x49, 0x01, 0x04, 0x00, 0x00, 0xff, 0xff,
|
|
},
|
|
[]byte{0x00},
|
|
io.ErrUnexpectedEOF,
|
|
},
|
|
{
|
|
"empty",
|
|
"",
|
|
[]byte{0x78, 0x9c, 0x03, 0x00, 0x00, 0x00, 0x00, 0x01},
|
|
nil,
|
|
nil,
|
|
},
|
|
{
|
|
"goodbye",
|
|
"goodbye, world",
|
|
[]byte{
|
|
0x78, 0x9c, 0x4b, 0xcf, 0xcf, 0x4f, 0x49, 0xaa,
|
|
0x4c, 0xd5, 0x51, 0x28, 0xcf, 0x2f, 0xca, 0x49,
|
|
0x01, 0x00, 0x28, 0xa5, 0x05, 0x5e,
|
|
},
|
|
nil,
|
|
nil,
|
|
},
|
|
{
|
|
"bad header",
|
|
"",
|
|
[]byte{0x78, 0x9f, 0x03, 0x00, 0x00, 0x00, 0x00, 0x01},
|
|
nil,
|
|
ErrHeader,
|
|
},
|
|
{
|
|
"bad checksum",
|
|
"",
|
|
[]byte{0x78, 0x9c, 0x03, 0x00, 0x00, 0x00, 0x00, 0xff},
|
|
nil,
|
|
ErrChecksum,
|
|
},
|
|
{
|
|
"not enough data",
|
|
"",
|
|
[]byte{0x78, 0x9c, 0x03, 0x00, 0x00, 0x00},
|
|
nil,
|
|
io.ErrUnexpectedEOF,
|
|
},
|
|
{
|
|
"excess data is silently ignored",
|
|
"",
|
|
[]byte{
|
|
0x78, 0x9c, 0x03, 0x00, 0x00, 0x00, 0x00, 0x01,
|
|
0x78, 0x9c, 0xff,
|
|
},
|
|
nil,
|
|
nil,
|
|
},
|
|
{
|
|
"dictionary",
|
|
"Hello, World!\n",
|
|
[]byte{
|
|
0x78, 0xbb, 0x1c, 0x32, 0x04, 0x27, 0xf3, 0x00,
|
|
0xb1, 0x75, 0x20, 0x1c, 0x45, 0x2e, 0x00, 0x24,
|
|
0x12, 0x04, 0x74,
|
|
},
|
|
[]byte{
|
|
0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x20, 0x57, 0x6f, 0x72, 0x6c, 0x64, 0x0a,
|
|
},
|
|
nil,
|
|
},
|
|
{
|
|
"wrong dictionary",
|
|
"",
|
|
[]byte{
|
|
0x78, 0xbb, 0x1c, 0x32, 0x04, 0x27, 0xf3, 0x00,
|
|
0xb1, 0x75, 0x20, 0x1c, 0x45, 0x2e, 0x00, 0x24,
|
|
0x12, 0x04, 0x74,
|
|
},
|
|
[]byte{
|
|
0x48, 0x65, 0x6c, 0x6c,
|
|
},
|
|
ErrDictionary,
|
|
},
|
|
{
|
|
"truncated zlib stream amid raw-block",
|
|
"hello",
|
|
[]byte{
|
|
0x78, 0x9c, 0x00, 0x0c, 0x00, 0xf3, 0xff, 0x68, 0x65, 0x6c, 0x6c, 0x6f,
|
|
},
|
|
nil,
|
|
io.ErrUnexpectedEOF,
|
|
},
|
|
{
|
|
"truncated zlib stream amid fixed-block",
|
|
"He",
|
|
[]byte{
|
|
0x78, 0x9c, 0xf2, 0x48, 0xcd,
|
|
},
|
|
nil,
|
|
io.ErrUnexpectedEOF,
|
|
},
|
|
}
|
|
|
|
func TestDecompressor(t *testing.T) {
|
|
b := new(bytes.Buffer)
|
|
for _, tt := range zlibTests {
|
|
in := bytes.NewReader(tt.compressed)
|
|
zr, err := NewReaderDict(in, tt.dict)
|
|
if err != nil {
|
|
if err != tt.err {
|
|
t.Errorf("%s: NewReader: %s", tt.desc, err)
|
|
}
|
|
continue
|
|
}
|
|
defer zr.Close()
|
|
|
|
// Read and verify correctness of data.
|
|
b.Reset()
|
|
n, err := io.Copy(b, zr)
|
|
if err != nil {
|
|
if err != tt.err {
|
|
t.Errorf("%s: io.Copy: %v want %v", tt.desc, err, tt.err)
|
|
}
|
|
continue
|
|
}
|
|
s := b.String()
|
|
if s != tt.raw {
|
|
t.Errorf("%s: got %d-byte %q want %d-byte %q", tt.desc, n, s, len(tt.raw), tt.raw)
|
|
}
|
|
|
|
// Check for sticky errors.
|
|
if n, err := zr.Read([]byte{0}); n != 0 || err != io.EOF {
|
|
t.Errorf("%s: Read() = (%d, %v), want (0, io.EOF)", tt.desc, n, err)
|
|
}
|
|
if err := zr.Close(); err != nil {
|
|
t.Errorf("%s: Close() = %v, want nil", tt.desc, err)
|
|
}
|
|
}
|
|
}
|