110 lines
2.6 KiB
Go
110 lines
2.6 KiB
Go
|
// Copyright 2014-2017 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 lzma
|
||
|
|
|
||
|
|
import (
|
||
|
|
"bytes"
|
||
|
|
"io"
|
||
|
|
"math/rand"
|
||
|
|
"strings"
|
||
|
|
"testing"
|
||
|
|
|
||
|
|
"github.com/ulikunitz/xz/internal/randtxt"
|
||
|
|
)
|
||
|
|
|
||
|
|
func TestWriter2(t *testing.T) {
|
||
|
|
var buf bytes.Buffer
|
||
|
|
w, err := Writer2Config{DictCap: 4096}.NewWriter2(&buf)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("NewWriter error %s", err)
|
||
|
|
}
|
||
|
|
n, err := w.Write([]byte{'a'})
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("w.Write([]byte{'a'}) error %s", err)
|
||
|
|
}
|
||
|
|
if n != 1 {
|
||
|
|
t.Fatalf("w.Write([]byte{'a'}) returned %d; want %d", n, 1)
|
||
|
|
}
|
||
|
|
if err = w.Flush(); err != nil {
|
||
|
|
t.Fatalf("w.Flush() error %s", err)
|
||
|
|
}
|
||
|
|
// check that double Flush doesn't write another chunk
|
||
|
|
if err = w.Flush(); err != nil {
|
||
|
|
t.Fatalf("w.Flush() error %s", err)
|
||
|
|
}
|
||
|
|
if err = w.Close(); err != nil {
|
||
|
|
t.Fatalf("w.Close() error %s", err)
|
||
|
|
}
|
||
|
|
p := buf.Bytes()
|
||
|
|
want := []byte{1, 0, 0, 'a', 0}
|
||
|
|
if !bytes.Equal(p, want) {
|
||
|
|
t.Fatalf("bytes written %#v; want %#v", p, want)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func TestCycle1(t *testing.T) {
|
||
|
|
var buf bytes.Buffer
|
||
|
|
w, err := Writer2Config{DictCap: 4096}.NewWriter2(&buf)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("NewWriter error %s", err)
|
||
|
|
}
|
||
|
|
n, err := w.Write([]byte{'a'})
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("w.Write([]byte{'a'}) error %s", err)
|
||
|
|
}
|
||
|
|
if n != 1 {
|
||
|
|
t.Fatalf("w.Write([]byte{'a'}) returned %d; want %d", n, 1)
|
||
|
|
}
|
||
|
|
if err = w.Close(); err != nil {
|
||
|
|
t.Fatalf("w.Close() error %s", err)
|
||
|
|
}
|
||
|
|
r, err := Reader2Config{DictCap: 4096}.NewReader2(&buf)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("NewReader error %s", err)
|
||
|
|
}
|
||
|
|
p := make([]byte, 3)
|
||
|
|
n, err = r.Read(p)
|
||
|
|
t.Logf("n %d error %v", n, err)
|
||
|
|
}
|
||
|
|
|
||
|
|
func TestCycle2(t *testing.T) {
|
||
|
|
buf := new(bytes.Buffer)
|
||
|
|
w, err := Writer2Config{DictCap: 4096}.NewWriter2(buf)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("NewWriter error %s", err)
|
||
|
|
}
|
||
|
|
// const txtlen = 1024
|
||
|
|
const txtlen = 2100000
|
||
|
|
io.CopyN(buf, randtxt.NewReader(rand.NewSource(42)), txtlen)
|
||
|
|
txt := buf.String()
|
||
|
|
buf.Reset()
|
||
|
|
n, err := io.Copy(w, strings.NewReader(txt))
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("Compressing copy error %s", err)
|
||
|
|
}
|
||
|
|
if n != txtlen {
|
||
|
|
t.Fatalf("Compressing data length %d; want %d", n, txtlen)
|
||
|
|
}
|
||
|
|
if err = w.Close(); err != nil {
|
||
|
|
t.Fatalf("w.Close error %s", err)
|
||
|
|
}
|
||
|
|
t.Logf("buf.Len() %d", buf.Len())
|
||
|
|
r, err := Reader2Config{DictCap: 4096}.NewReader2(buf)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("NewReader error %s", err)
|
||
|
|
}
|
||
|
|
out := new(bytes.Buffer)
|
||
|
|
n, err = io.Copy(out, r)
|
||
|
|
if err != nil {
|
||
|
|
t.Fatalf("Decompressing copy error %s after %d bytes", err, n)
|
||
|
|
}
|
||
|
|
if n != txtlen {
|
||
|
|
t.Fatalf("Decompression data length %d; want %d", n, txtlen)
|
||
|
|
}
|
||
|
|
if txt != out.String() {
|
||
|
|
t.Fatal("decompressed data differs from original")
|
||
|
|
}
|
||
|
|
}
|