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// Copyright (c) 2019 Klaus Post. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package s2
import (
"bytes"
"fmt"
"io"
"os"
"runtime"
"strings"
"testing"
"github.com/klauspost/compress/zip"
)
func TestDecodeRegression(t *testing.T) {
data, err := os.ReadFile("testdata/dec-block-regressions.zip")
if err != nil {
t.Fatal(err)
}
zr, err := zip.NewReader(bytes.NewReader(data), int64(len(data)))
if err != nil {
t.Fatal(err)
}
for _, tt := range zr.File {
if !strings.HasSuffix(t.Name(), "") {
continue
}
t.Run(tt.Name, func(t *testing.T) {
r, err := tt.Open()
if err != nil {
t.Error(err)
return
}
in, err := io.ReadAll(r)
if err != nil {
t.Error(err)
}
got, err := Decode(nil, in)
t.Log("Received:", len(got), err)
})
}
}
func TestDecoderMaxBlockSize(t *testing.T) {
data, err := os.ReadFile("testdata/enc_regressions.zip")
if err != nil {
t.Fatal(err)
}
zr, err := zip.NewReader(bytes.NewReader(data), int64(len(data)))
if err != nil {
t.Fatal(err)
}
sizes := []int{4 << 10, 10 << 10, 1 << 20, 4 << 20}
test := func(t *testing.T, data []byte) {
for _, size := range sizes {
t.Run(fmt.Sprintf("%d", size), func(t *testing.T) {
var buf bytes.Buffer
dec := NewReader(nil, ReaderMaxBlockSize(size), ReaderAllocBlock(size/2))
enc := NewWriter(&buf, WriterBlockSize(size), WriterPadding(16<<10), WriterPaddingSrc(zeroReader{}))
// Test writer.
n, err := enc.Write(data)
if err != nil {
t.Error(err)
return
}
if n != len(data) {
t.Error(fmt.Errorf("Write: Short write, want %d, got %d", len(data), n))
return
}
err = enc.Close()
if err != nil {
t.Error(err)
return
}
// Calling close twice should not affect anything.
err = enc.Close()
if err != nil {
t.Error(err)
return
}
dec.Reset(&buf)
got, err := io.ReadAll(dec)
if err != nil {
t.Error(err)
return
}
if !bytes.Equal(data, got) {
t.Error("block (reset) decoder mismatch")
return
}
// Test Reset on both and use ReadFrom instead.
buf.Reset()
enc.Reset(&buf)
n2, err := enc.ReadFrom(bytes.NewBuffer(data))
if err != nil {
t.Error(err)
return
}
if n2 != int64(len(data)) {
t.Error(fmt.Errorf("ReadFrom: Short read, want %d, got %d", len(data), n2))
return
}
// Encode twice...
n2, err = enc.ReadFrom(bytes.NewBuffer(data))
if err != nil {
t.Error(err)
return
}
if n2 != int64(len(data)) {
t.Error(fmt.Errorf("ReadFrom: Short read, want %d, got %d", len(data), n2))
return
}
err = enc.Close()
if err != nil {
t.Error(err)
return
}
if enc.pad > 0 && buf.Len()%enc.pad != 0 {
t.Error(fmt.Errorf("wanted size to be mutiple of %d, got size %d with remainder %d", enc.pad, buf.Len(), buf.Len()%enc.pad))
return
}
encoded := buf.Bytes()
dec.Reset(&buf)
// Skip first...
dec.Skip(int64(len(data)))
got, err = io.ReadAll(dec)
if err != nil {
t.Error(err)
return
}
if !bytes.Equal(data, got) {
t.Error("frame (reset) decoder mismatch")
return
}
// Re-add data, Read concurrent.
buf.Write(encoded)
dec.Reset(&buf)
var doubleB bytes.Buffer
nb, err := dec.DecodeConcurrent(&doubleB, runtime.GOMAXPROCS(0))
if err != nil {
t.Error(err)
return
}
if nb != int64(len(data)*2) {
t.Errorf("want %d, got %d, err: %v", len(data)*2, nb, err)
return
}
got = doubleB.Bytes()[:len(data)]
if !bytes.Equal(data, got) {
t.Error("frame (DecodeConcurrent) decoder mismatch")
return
}
got = doubleB.Bytes()[len(data):]
if !bytes.Equal(data, got) {
t.Error("frame (DecodeConcurrent) decoder mismatch")
return
}
})
}
}
for _, tt := range zr.File {
if !strings.HasSuffix(t.Name(), "") {
continue
}
t.Run(tt.Name, func(t *testing.T) {
r, err := tt.Open()
if err != nil {
t.Error(err)
return
}
b, err := io.ReadAll(r)
if err != nil {
t.Error(err)
return
}
test(t, b[:len(b):len(b)])
})
}
}
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