// 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 tar
import (
"bytes"
"crypto/md5"
"fmt"
"io"
"os"
"reflect"
"strings"
"testing"
"time"
)
type untarTest struct {
file string
headers []*Header
cksums []string
}
var gnuTarTest = &untarTest{
file: "testdata/gnu.tar",
headers: []*Header{
{
Name: "small.txt",
Mode: 0640,
Uid: 73025,
Gid: 5000,
Size: 5,
ModTime: time.Unix(1244428340, 0),
Typeflag: '0',
Uname: "dsymonds",
Gname: "eng",
},
{
Name: "small2.txt",
Mode: 0640,
Uid: 73025,
Gid: 5000,
Size: 11,
ModTime: time.Unix(1244436044, 0),
Typeflag: '0',
Uname: "dsymonds",
Gname: "eng",
},
},
cksums: []string{
"e38b27eaccb4391bdec553a7f3ae6b2f",
"c65bd2e50a56a2138bf1716f2fd56fe9",
},
}
var untarTests = []*untarTest{
gnuTarTest,
{
file: "testdata/star.tar",
headers: []*Header{
{
Name: "small.txt",
Mode: 0640,
Uid: 73025,
Gid: 5000,
Size: 5,
ModTime: time.Unix(1244592783, 0),
Typeflag: '0',
Uname: "dsymonds",
Gname: "eng",
AccessTime: time.Unix(1244592783, 0),
ChangeTime: time.Unix(1244592783, 0),
},
{
Name: "small2.txt",
Mode: 0640,
Uid: 73025,
Gid: 5000,
Size: 11,
ModTime: time.Unix(1244592783, 0),
Typeflag: '0',
Uname: "dsymonds",
Gname: "eng",
AccessTime: time.Unix(1244592783, 0),
ChangeTime: time.Unix(1244592783, 0),
},
},
},
{
file: "testdata/v7.tar",
headers: []*Header{
{
Name: "small.txt",
Mode: 0444,
Uid: 73025,
Gid: 5000,
Size: 5,
ModTime: time.Unix(1244593104, 0),
Typeflag: '\x00',
},
{
Name: "small2.txt",
Mode: 0444,
Uid: 73025,
Gid: 5000,
Size: 11,
ModTime: time.Unix(1244593104, 0),
Typeflag: '\x00',
},
},
},
{
file: "testdata/pax.tar",
headers: []*Header{
{
Name: "a/123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100",
Mode: 0664,
Uid: 1000,
Gid: 1000,
Uname: "shane",
Gname: "shane",
Size: 7,
ModTime: time.Unix(1350244992, 23960108),
ChangeTime: time.Unix(1350244992, 23960108),
AccessTime: time.Unix(1350244992, 23960108),
Typeflag: TypeReg,
},
{
Name: "a/b",
Mode: 0777,
Uid: 1000,
Gid: 1000,
Uname: "shane",
Gname: "shane",
Size: 0,
ModTime: time.Unix(1350266320, 910238425),
ChangeTime: time.Unix(1350266320, 910238425),
AccessTime: time.Unix(1350266320, 910238425),
Typeflag: TypeSymlink,
Linkname: "123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100",
},
},
},
}
func TestReader(t *testing.T) {
testLoop:
for i, test := range untarTests {
f, err := os.Open(test.file)
if err != nil {
t.Errorf("test %d: Unexpected error: %v", i, err)
continue
}
tr := NewReader(f)
for j, header := range test.headers {
hdr, err := tr.Next()
if err != nil || hdr == nil {
t.Errorf("test %d, entry %d: Didn't get entry: %v", i, j, err)
f.Close()
continue testLoop
}
if *hdr != *header {
t.Errorf("test %d, entry %d: Incorrect header:\nhave %+v\nwant %+v",
i, j, *hdr, *header)
}
}
hdr, err := tr.Next()
if err == io.EOF {
continue testLoop
}
if hdr != nil || err != nil {
t.Errorf("test %d: Unexpected entry or error: hdr=%v err=%v", i, hdr, err)
}
f.Close()
}
}
func TestPartialRead(t *testing.T) {
f, err := os.Open("testdata/gnu.tar")
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer f.Close()
tr := NewReader(f)
// Read the first four bytes; Next() should skip the last byte.
hdr, err := tr.Next()
if err != nil || hdr == nil {
t.Fatalf("Didn't get first file: %v", err)
}
buf := make([]byte, 4)
if _, err := io.ReadFull(tr, buf); err != nil {
t.Fatalf("Unexpected error: %v", err)
}
if expected := []byte("Kilt"); !bytes.Equal(buf, expected) {
t.Errorf("Contents = %v, want %v", buf, expected)
}
// Second file
hdr, err = tr.Next()
if err != nil || hdr == nil {
t.Fatalf("Didn't get second file: %v", err)
}
buf = make([]byte, 6)
if _, err := io.ReadFull(tr, buf); err != nil {
t.Fatalf("Unexpected error: %v", err)
}
if expected := []byte("Google"); !bytes.Equal(buf, expected) {
t.Errorf("Contents = %v, want %v", buf, expected)
}
}
func TestIncrementalRead(t *testing.T) {
test := gnuTarTest
f, err := os.Open(test.file)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer f.Close()
tr := NewReader(f)
headers := test.headers
cksums := test.cksums
nread := 0
// loop over all files
for ; ; nread++ {
hdr, err := tr.Next()
if hdr == nil || err == io.EOF {
break
}
// check the header
if *hdr != *headers[nread] {
t.Errorf("Incorrect header:\nhave %+v\nwant %+v",
*hdr, headers[nread])
}
// read file contents in little chunks EOF,
// checksumming all the way
h := md5.New()
rdbuf := make([]uint8, 8)
for {
nr, err := tr.Read(rdbuf)
if err == io.EOF {
break
}
if err != nil {
t.Errorf("Read: unexpected error %v\n", err)
break
}
h.Write(rdbuf[0:nr])
}
// verify checksum
have := fmt.Sprintf("%x", h.Sum(nil))
want := cksums[nread]
if want != have {
t.Errorf("Bad checksum on file %s:\nhave %+v\nwant %+v", hdr.Name, have, want)
}
}
if nread != len(headers) {
t.Errorf("Didn't process all files\nexpected: %d\nprocessed %d\n", len(headers), nread)
}
}
func TestNonSeekable(t *testing.T) {
test := gnuTarTest
f, err := os.Open(test.file)
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
defer f.Close()
type readerOnly struct {
io.Reader
}
tr := NewReader(readerOnly{f})
nread := 0
for ; ; nread++ {
_, err := tr.Next()
if err == io.EOF {
break
}
if err != nil {
t.Fatalf("Unexpected error: %v", err)
}
}
if nread != len(test.headers) {
t.Errorf("Didn't process all files\nexpected: %d\nprocessed %d\n", len(test.headers), nread)
}
}
func TestParsePAXHeader(t *testing.T) {
paxTests := [][3]string{
{"a", "a=name", "10 a=name\n"}, // Test case involving multiple acceptable lengths
{"a", "a=name", "9 a=name\n"}, // Test case involving multiple acceptable length
{"mtime", "mtime=1350244992.023960108", "30 mtime=1350244992.023960108\n"}}
for _, test := range paxTests {
key, expected, raw := test[0], test[1], test[2]
reader := bytes.NewBuffer([]byte(raw))
headers, err := parsePAX(reader)
if err != nil {
t.Errorf("Couldn't parse correctly formatted headers: %v", err)
continue
}
if strings.EqualFold(headers[key], expected) {
t.Errorf("mtime header incorrectly parsed: got %s, wanted %s", headers[key], expected)
continue
}
trailer := make([]byte, 100)
n, err := reader.Read(trailer)
if err != io.EOF || n != 0 {
t.Error("Buffer wasn't consumed")
}
}
badHeader := bytes.NewBuffer([]byte("3 somelongkey="))
if _, err := parsePAX(badHeader); err != ErrHeader {
t.Fatal("Unexpected success when parsing bad header")
}
}
func TestParsePAXTime(t *testing.T) {
// Some valid PAX time values
timestamps := map[string]time.Time{
"1350244992.023960108": time.Unix(1350244992, 23960108), // The commoon case
"1350244992.02396010": time.Unix(1350244992, 23960100), // Lower precision value
"1350244992.0239601089": time.Unix(1350244992, 23960108), // Higher precision value
"1350244992": time.Unix(1350244992, 0), // Low precision value
}
for input, expected := range timestamps {
ts, err := parsePAXTime(input)
if err != nil {
t.Fatal(err)
}
if !ts.Equal(expected) {
t.Fatalf("Time parsing failure %s %s", ts, expected)
}
}
}
func TestMergePAX(t *testing.T) {
hdr := new(Header)
// Test a string, integer, and time based value.
headers := map[string]string{
"path": "a/b/c",
"uid": "1000",
"mtime": "1350244992.023960108",
}
err := mergePAX(hdr, headers)
if err != nil {
t.Fatal(err)
}
want := &Header{
Name: "a/b/c",
Uid: 1000,
ModTime: time.Unix(1350244992, 23960108),
}
if !reflect.DeepEqual(hdr, want) {
t.Errorf("incorrect merge: got %+v, want %+v", hdr, want)
}
}