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// Copyright 2011 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 zip
import (
"bytes"
"io"
"io/ioutil"
"math/rand"
"os"
"testing"
)
// TODO(adg): a more sophisticated test suite
type WriteTest struct {
Name string
Data []byte
Method uint16
Mode os.FileMode
}
var writeTests = []WriteTest{
{
Name: "foo",
Data: []byte("Rabbits, guinea pigs, gophers, marsupial rats, and quolls."),
Method: Store,
Mode: 0666,
},
{
Name: "bar",
Data: nil, // large data set in the test
Method: Deflate,
Mode: 0644,
},
{
Name: "setuid",
Data: []byte("setuid file"),
Method: Deflate,
Mode: 0755 | os.ModeSetuid,
},
{
Name: "setgid",
Data: []byte("setgid file"),
Method: Deflate,
Mode: 0755 | os.ModeSetgid,
},
{
Name: "symlink",
Data: []byte("../link/target"),
Method: Deflate,
Mode: 0755 | os.ModeSymlink,
},
}
func TestWriter(t *testing.T) {
largeData := make([]byte, 1<<17)
for i := range largeData {
largeData[i] = byte(rand.Int())
}
writeTests[1].Data = largeData
defer func() {
writeTests[1].Data = nil
}()
// write a zip file
buf := new(bytes.Buffer)
w := NewWriter(buf)
for _, wt := range writeTests {
testCreate(t, w, &wt)
}
if err := w.Close(); err != nil {
t.Fatal(err)
}
// read it back
r, err := NewReader(bytes.NewReader(buf.Bytes()), int64(buf.Len()))
if err != nil {
t.Fatal(err)
}
for i, wt := range writeTests {
testReadFile(t, r.File[i], &wt)
}
}
func TestWriterFlush(t *testing.T) {
var buf bytes.Buffer
w := NewWriter(struct{ io.Writer }{&buf})
_, err := w.Create("foo")
if err != nil {
t.Fatal(err)
}
if buf.Len() > 0 {
t.Fatalf("Unexpected %d bytes already in buffer", buf.Len())
}
if err := w.Flush(); err != nil {
t.Fatal(err)
}
if buf.Len() == 0 {
t.Fatal("No bytes written after Flush")
}
}
func testCreate(t *testing.T, w *Writer, wt *WriteTest) {
header := &FileHeader{
Name: wt.Name,
Method: wt.Method,
}
if wt.Mode != 0 {
header.SetMode(wt.Mode)
}
f, err := w.CreateHeader(header)
if err != nil {
t.Fatal(err)
}
_, err = f.Write(wt.Data)
if err != nil {
t.Fatal(err)
}
}
func testReadFile(t *testing.T, f *File, wt *WriteTest) {
if f.Name != wt.Name {
t.Fatalf("File name: got %q, want %q", f.Name, wt.Name)
}
testFileMode(t, wt.Name, f, wt.Mode)
rc, err := f.Open()
if err != nil {
t.Fatal("opening:", err)
}
b, err := ioutil.ReadAll(rc)
if err != nil {
t.Fatal("reading:", err)
}
err = rc.Close()
if err != nil {
t.Fatal("closing:", err)
}
if !bytes.Equal(b, wt.Data) {
t.Errorf("File contents %q, want %q", b, wt.Data)
}
}
func BenchmarkCompressedZipGarbage(b *testing.B) {
b.ReportAllocs()
var buf bytes.Buffer
bigBuf := bytes.Repeat([]byte("a"), 1<<20)
for i := 0; i < b.N; i++ {
buf.Reset()
zw := NewWriter(&buf)
for j := 0; j < 3; j++ {
w, _ := zw.CreateHeader(&FileHeader{
Name: "foo",
Method: Deflate,
})
w.Write(bigBuf)
}
zw.Close()
}
}
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