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// Copyright 2014-2022 Ulrich Kunitz. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package xz
import (
"bytes"
"io"
"io/ioutil"
"os"
"testing"
)
func TestReaderSimple(t *testing.T) {
const file = "fox.xz"
xz, err := os.Open(file)
if err != nil {
t.Fatalf("os.Open(%q) error %s", file, err)
}
r, err := NewReader(xz)
if err != nil {
t.Fatalf("NewReader error %s", err)
}
var buf bytes.Buffer
if _, err = io.Copy(&buf, r); err != nil {
t.Fatalf("io.Copy error %s", err)
}
}
func TestReaderSingleStream(t *testing.T) {
data, err := ioutil.ReadFile("fox.xz")
if err != nil {
t.Fatalf("ReadFile error %s", err)
}
xz := bytes.NewReader(data)
rc := ReaderConfig{SingleStream: true}
r, err := rc.NewReader(xz)
if err != nil {
t.Fatalf("NewReader error %s", err)
}
var buf bytes.Buffer
if _, err = io.Copy(&buf, r); err != nil {
t.Fatalf("io.Copy error %s", err)
}
buf.Reset()
data = append(data, 0)
xz = bytes.NewReader(data)
r, err = rc.NewReader(xz)
if err != nil {
t.Fatalf("NewReader error %s", err)
}
if _, err = io.Copy(&buf, r); err != errUnexpectedData {
t.Fatalf("io.Copy returned %v; want %v", err, errUnexpectedData)
}
}
func TestReaderMultipleStreams(t *testing.T) {
data, err := ioutil.ReadFile("fox.xz")
if err != nil {
t.Fatalf("ReadFile error %s", err)
}
m := make([]byte, 0, 4*len(data)+4*4)
m = append(m, data...)
m = append(m, data...)
m = append(m, 0, 0, 0, 0)
m = append(m, data...)
m = append(m, 0, 0, 0, 0)
m = append(m, 0, 0, 0, 0)
m = append(m, data...)
m = append(m, 0, 0, 0, 0)
xz := bytes.NewReader(m)
r, err := NewReader(xz)
if err != nil {
t.Fatalf("NewReader error %s", err)
}
var buf bytes.Buffer
if _, err = io.Copy(&buf, r); err != nil {
t.Fatalf("io.Copy error %s", err)
}
}
func TestCheckNone(t *testing.T) {
const file = "fox-check-none.xz"
xz, err := os.Open(file)
if err != nil {
t.Fatalf("os.Open(%q) error %s", file, err)
}
r, err := NewReader(xz)
if err != nil {
t.Fatalf("NewReader error %s", err)
}
var buf bytes.Buffer
if _, err = io.Copy(&buf, r); err != nil {
t.Fatalf("io.Copy error %s", err)
}
}
func BenchmarkReader(b *testing.B) {
const testFile = "testdata/enwik7"
data, err := os.ReadFile(testFile)
if err != nil {
b.Fatalf("os.ReadFile(%q) error %s", testFile, err)
}
buf := new(bytes.Buffer)
uncompressedLen := int64(len(data))
b.SetBytes(int64(uncompressedLen))
b.ReportAllocs()
buf.Reset()
w, err := NewWriter(buf)
if err != nil {
b.Fatalf("NewWriter(buf) error %s", err)
}
if _, err = w.Write(data); err != nil {
b.Fatalf("w.Write(data) error %s", err)
}
if err = w.Close(); err != nil {
b.Fatalf("w.Write(data)")
}
data = make([]byte, buf.Len())
copy(data, buf.Bytes())
b.ResetTimer()
for i := 0; i < b.N; i++ {
buf.Reset()
r, err := NewReader(bytes.NewReader(data))
if err != nil {
b.Fatalf("NewReader(data) error %s", err)
}
n, err := io.Copy(buf, r)
if err != nil {
b.Fatalf("io.Copy(buf, r) error %s", err)
}
if n != uncompressedLen {
b.Fatalf("io.Copy got %d; want %d", n, uncompressedLen)
}
}
}
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