go reader_test 源码
golang reader_test 代码
文件路径：/src/archive/tar/reader_test.go
// 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"
"errors"
"fmt"
"io"
"math"
"os"
"path"
"reflect"
"strconv"
"strings"
"testing"
"time"
)
func TestReader(t *testing.T) {
vectors := []struct {
file string // Test input file
headers []*Header // Expected output headers
chksums []string // MD5 checksum of files, leave as nil if not checked
err error // Expected error to occur
}{{
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",
Format: FormatGNU,
}, {
Name: "small2.txt",
Mode: 0640,
Uid: 73025,
Gid: 5000,
Size: 11,
ModTime: time.Unix(1244436044, 0),
Typeflag: '0',
Uname: "dsymonds",
Gname: "eng",
Format: FormatGNU,
}},
chksums: []string{
"e38b27eaccb4391bdec553a7f3ae6b2f",
"c65bd2e50a56a2138bf1716f2fd56fe9",
},
}, {
file: "testdata/sparse-formats.tar",
headers: []*Header{{
Name: "sparse-gnu",
Mode: 420,
Uid: 1000,
Gid: 1000,
Size: 200,
ModTime: time.Unix(1392395740, 0),
Typeflag: 0x53,
Linkname: "",
Uname: "david",
Gname: "david",
Devmajor: 0,
Devminor: 0,
Format: FormatGNU,
}, {
Name: "sparse-posix-0.0",
Mode: 420,
Uid: 1000,
Gid: 1000,
Size: 200,
ModTime: time.Unix(1392342187, 0),
Typeflag: 0x30,
Linkname: "",
Uname: "david",
Gname: "david",
Devmajor: 0,
Devminor: 0,
PAXRecords: map[string]string{
"GNU.sparse.size": "200",
"GNU.sparse.numblocks": "95",
"GNU.sparse.map": "1,1,3,1,5,1,7,1,9,1,11,1,13,1,15,1,17,1,19,1,21,1,23,1,25,1,27,1,29,1,31,1,33,1,35,1,37,1,39,1,41,1,43,1,45,1,47,1,49,1,51,1,53,1,55,1,57,1,59,1,61,1,63,1,65,1,67,1,69,1,71,1,73,1,75,1,77,1,79,1,81,1,83,1,85,1,87,1,89,1,91,1,93,1,95,1,97,1,99,1,101,1,103,1,105,1,107,1,109,1,111,1,113,1,115,1,117,1,119,1,121,1,123,1,125,1,127,1,129,1,131,1,133,1,135,1,137,1,139,1,141,1,143,1,145,1,147,1,149,1,151,1,153,1,155,1,157,1,159,1,161,1,163,1,165,1,167,1,169,1,171,1,173,1,175,1,177,1,179,1,181,1,183,1,185,1,187,1,189,1",
},
Format: FormatPAX,
}, {
Name: "sparse-posix-0.1",
Mode: 420,
Uid: 1000,
Gid: 1000,
Size: 200,
ModTime: time.Unix(1392340456, 0),
Typeflag: 0x30,
Linkname: "",
Uname: "david",
Gname: "david",
Devmajor: 0,
Devminor: 0,
PAXRecords: map[string]string{
"GNU.sparse.size": "200",
"GNU.sparse.numblocks": "95",
"GNU.sparse.map": "1,1,3,1,5,1,7,1,9,1,11,1,13,1,15,1,17,1,19,1,21,1,23,1,25,1,27,1,29,1,31,1,33,1,35,1,37,1,39,1,41,1,43,1,45,1,47,1,49,1,51,1,53,1,55,1,57,1,59,1,61,1,63,1,65,1,67,1,69,1,71,1,73,1,75,1,77,1,79,1,81,1,83,1,85,1,87,1,89,1,91,1,93,1,95,1,97,1,99,1,101,1,103,1,105,1,107,1,109,1,111,1,113,1,115,1,117,1,119,1,121,1,123,1,125,1,127,1,129,1,131,1,133,1,135,1,137,1,139,1,141,1,143,1,145,1,147,1,149,1,151,1,153,1,155,1,157,1,159,1,161,1,163,1,165,1,167,1,169,1,171,1,173,1,175,1,177,1,179,1,181,1,183,1,185,1,187,1,189,1",
"GNU.sparse.name": "sparse-posix-0.1",
},
Format: FormatPAX,
}, {
Name: "sparse-posix-1.0",
Mode: 420,
Uid: 1000,
Gid: 1000,
Size: 200,
ModTime: time.Unix(1392337404, 0),
Typeflag: 0x30,
Linkname: "",
Uname: "david",
Gname: "david",
Devmajor: 0,
Devminor: 0,
PAXRecords: map[string]string{
"GNU.sparse.major": "1",
"GNU.sparse.minor": "0",
"GNU.sparse.realsize": "200",
"GNU.sparse.name": "sparse-posix-1.0",
},
Format: FormatPAX,
}, {
Name: "end",
Mode: 420,
Uid: 1000,
Gid: 1000,
Size: 4,
ModTime: time.Unix(1392398319, 0),
Typeflag: 0x30,
Linkname: "",
Uname: "david",
Gname: "david",
Devmajor: 0,
Devminor: 0,
Format: FormatGNU,
}},
chksums: []string{
"6f53234398c2449fe67c1812d993012f",
"6f53234398c2449fe67c1812d993012f",
"6f53234398c2449fe67c1812d993012f",
"6f53234398c2449fe67c1812d993012f",
"b0061974914468de549a2af8ced10316",
},
}, {
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: '0',
}, {
Name: "small2.txt",
Mode: 0444,
Uid: 73025,
Gid: 5000,
Size: 11,
ModTime: time.Unix(1244593104, 0),
Typeflag: '0',
}},
}, {
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,
PAXRecords: map[string]string{
"path": "a/123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100",
"mtime": "1350244992.023960108",
"atime": "1350244992.023960108",
"ctime": "1350244992.023960108",
},
Format: FormatPAX,
}, {
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",
PAXRecords: map[string]string{
"linkpath": "123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100",
"mtime": "1350266320.910238425",
"atime": "1350266320.910238425",
"ctime": "1350266320.910238425",
},
Format: FormatPAX,
}},
}, {
file: "testdata/pax-bad-hdr-file.tar",
err: ErrHeader,
}, {
file: "testdata/pax-bad-mtime-file.tar",
err: ErrHeader,
}, {
file: "testdata/pax-pos-size-file.tar",
headers: []*Header{{
Name: "foo",
Mode: 0640,
Uid: 319973,
Gid: 5000,
Size: 999,
ModTime: time.Unix(1442282516, 0),
Typeflag: '0',
Uname: "joetsai",
Gname: "eng",
PAXRecords: map[string]string{
"size": "000000000000000000000999",
},
Format: FormatPAX,
}},
chksums: []string{
"0afb597b283fe61b5d4879669a350556",
},
}, {
file: "testdata/pax-records.tar",
headers: []*Header{{
Typeflag: TypeReg,
Name: "file",
Uname: strings.Repeat("long", 10),
ModTime: time.Unix(0, 0),
PAXRecords: map[string]string{
"GOLANG.pkg": "tar",
"comment": "Hello, 世界",
"uname": strings.Repeat("long", 10),
},
Format: FormatPAX,
}},
}, {
file: "testdata/pax-global-records.tar",
headers: []*Header{{
Typeflag: TypeXGlobalHeader,
Name: "global1",
PAXRecords: map[string]string{"path": "global1", "mtime": "1500000000.0"},
Format: FormatPAX,
}, {
Typeflag: TypeReg,
Name: "file1",
ModTime: time.Unix(0, 0),
Format: FormatUSTAR,
}, {
Typeflag: TypeReg,
Name: "file2",
PAXRecords: map[string]string{"path": "file2"},
ModTime: time.Unix(0, 0),
Format: FormatPAX,
}, {
Typeflag: TypeXGlobalHeader,
Name: "GlobalHead.0.0",
PAXRecords: map[string]string{"path": ""},
Format: FormatPAX,
}, {
Typeflag: TypeReg,
Name: "file3",
ModTime: time.Unix(0, 0),
Format: FormatUSTAR,
}, {
Typeflag: TypeReg,
Name: "file4",
ModTime: time.Unix(1400000000, 0),
PAXRecords: map[string]string{"mtime": "1400000000"},
Format: FormatPAX,
}},
}, {
file: "testdata/nil-uid.tar", // golang.org/issue/5290
headers: []*Header{{
Name: "P1050238.JPG.log",
Mode: 0664,
Uid: 0,
Gid: 0,
Size: 14,
ModTime: time.Unix(1365454838, 0),
Typeflag: TypeReg,
Linkname: "",
Uname: "eyefi",
Gname: "eyefi",
Devmajor: 0,
Devminor: 0,
Format: FormatGNU,
}},
}, {
file: "testdata/xattrs.tar",
headers: []*Header{{
Name: "small.txt",
Mode: 0644,
Uid: 1000,
Gid: 10,
Size: 5,
ModTime: time.Unix(1386065770, 448252320),
Typeflag: '0',
Uname: "alex",
Gname: "wheel",
AccessTime: time.Unix(1389782991, 419875220),
ChangeTime: time.Unix(1389782956, 794414986),
Xattrs: map[string]string{
"user.key": "value",
"user.key2": "value2",
// Interestingly, selinux encodes the terminating null inside the xattr
"security.selinux": "unconfined_u:object_r:default_t:s0\x00",
},
PAXRecords: map[string]string{
"mtime": "1386065770.44825232",
"atime": "1389782991.41987522",
"ctime": "1389782956.794414986",
"SCHILY.xattr.user.key": "value",
"SCHILY.xattr.user.key2": "value2",
"SCHILY.xattr.security.selinux": "unconfined_u:object_r:default_t:s0\x00",
},
Format: FormatPAX,
}, {
Name: "small2.txt",
Mode: 0644,
Uid: 1000,
Gid: 10,
Size: 11,
ModTime: time.Unix(1386065770, 449252304),
Typeflag: '0',
Uname: "alex",
Gname: "wheel",
AccessTime: time.Unix(1389782991, 419875220),
ChangeTime: time.Unix(1386065770, 449252304),
Xattrs: map[string]string{
"security.selinux": "unconfined_u:object_r:default_t:s0\x00",
},
PAXRecords: map[string]string{
"mtime": "1386065770.449252304",
"atime": "1389782991.41987522",
"ctime": "1386065770.449252304",
"SCHILY.xattr.security.selinux": "unconfined_u:object_r:default_t:s0\x00",
},
Format: FormatPAX,
}},
}, {
// Matches the behavior of GNU, BSD, and STAR tar utilities.
file: "testdata/gnu-multi-hdrs.tar",
headers: []*Header{{
Name: "GNU2/GNU2/long-path-name",
Linkname: "GNU4/GNU4/long-linkpath-name",
ModTime: time.Unix(0, 0),
Typeflag: '2',
Format: FormatGNU,
}},
}, {
// GNU tar file with atime and ctime fields set.
// Created with the GNU tar v1.27.1.
// tar --incremental -S -cvf gnu-incremental.tar test2
file: "testdata/gnu-incremental.tar",
headers: []*Header{{
Name: "test2/",
Mode: 16877,
Uid: 1000,
Gid: 1000,
Size: 14,
ModTime: time.Unix(1441973427, 0),
Typeflag: 'D',
Uname: "rawr",
Gname: "dsnet",
AccessTime: time.Unix(1441974501, 0),
ChangeTime: time.Unix(1441973436, 0),
Format: FormatGNU,
}, {
Name: "test2/foo",
Mode: 33188,
Uid: 1000,
Gid: 1000,
Size: 64,
ModTime: time.Unix(1441973363, 0),
Typeflag: '0',
Uname: "rawr",
Gname: "dsnet",
AccessTime: time.Unix(1441974501, 0),
ChangeTime: time.Unix(1441973436, 0),
Format: FormatGNU,
}, {
Name: "test2/sparse",
Mode: 33188,
Uid: 1000,
Gid: 1000,
Size: 536870912,
ModTime: time.Unix(1441973427, 0),
Typeflag: 'S',
Uname: "rawr",
Gname: "dsnet",
AccessTime: time.Unix(1441991948, 0),
ChangeTime: time.Unix(1441973436, 0),
Format: FormatGNU,
}},
}, {
// Matches the behavior of GNU and BSD tar utilities.
file: "testdata/pax-multi-hdrs.tar",
headers: []*Header{{
Name: "bar",
Linkname: "PAX4/PAX4/long-linkpath-name",
ModTime: time.Unix(0, 0),
Typeflag: '2',
PAXRecords: map[string]string{
"linkpath": "PAX4/PAX4/long-linkpath-name",
},
Format: FormatPAX,
}},
}, {
// Both BSD and GNU tar truncate long names at first NUL even
// if there is data following that NUL character.
// This is reasonable as GNU long names are C-strings.
file: "testdata/gnu-long-nul.tar",
headers: []*Header{{
Name: "0123456789",
Mode: 0644,
Uid: 1000,
Gid: 1000,
ModTime: time.Unix(1486082191, 0),
Typeflag: '0',
Uname: "rawr",
Gname: "dsnet",
Format: FormatGNU,
}},
}, {
// This archive was generated by Writer but is readable by both
// GNU and BSD tar utilities.
// The archive generated by GNU is nearly byte-for-byte identical
// to the Go version except the Go version sets a negative Devminor
// just to force the GNU format.
file: "testdata/gnu-utf8.tar",
headers: []*Header{{
Name: "☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹☺☻☹",
Mode: 0644,
Uid: 1000, Gid: 1000,
ModTime: time.Unix(0, 0),
Typeflag: '0',
Uname: "☺",
Gname: "⚹",
Format: FormatGNU,
}},
}, {
// This archive was generated by Writer but is readable by both
// GNU and BSD tar utilities.
// The archive generated by GNU is nearly byte-for-byte identical
// to the Go version except the Go version sets a negative Devminor
// just to force the GNU format.
file: "testdata/gnu-not-utf8.tar",
headers: []*Header{{
Name: "hi\x80\x81\x82\x83bye",
Mode: 0644,
Uid: 1000,
Gid: 1000,
ModTime: time.Unix(0, 0),
Typeflag: '0',
Uname: "rawr",
Gname: "dsnet",
Format: FormatGNU,
}},
}, {
// BSD tar v3.1.2 and GNU tar v1.27.1 both rejects PAX records
// with NULs in the key.
file: "testdata/pax-nul-xattrs.tar",
err: ErrHeader,
}, {
// BSD tar v3.1.2 rejects a PAX path with NUL in the value, while
// GNU tar v1.27.1 simply truncates at first NUL.
// We emulate the behavior of BSD since it is strange doing NUL
// truncations since PAX records are length-prefix strings instead
// of NUL-terminated C-strings.
file: "testdata/pax-nul-path.tar",
err: ErrHeader,
}, {
file: "testdata/neg-size.tar",
err: ErrHeader,
}, {
file: "testdata/issue10968.tar",
err: ErrHeader,
}, {
file: "testdata/issue11169.tar",
err: ErrHeader,
}, {
file: "testdata/issue12435.tar",
err: ErrHeader,
}, {
// Ensure that we can read back the original Header as written with
// a buggy pre-Go1.8 tar.Writer.
file: "testdata/invalid-go17.tar",
headers: []*Header{{
Name: "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/foo",
Uid: 010000000,
ModTime: time.Unix(0, 0),
Typeflag: '0',
}},
}, {
// USTAR archive with a regular entry with non-zero device numbers.
file: "testdata/ustar-file-devs.tar",
headers: []*Header{{
Name: "file",
Mode: 0644,
Typeflag: '0',
ModTime: time.Unix(0, 0),
Devmajor: 1,
Devminor: 1,
Format: FormatUSTAR,
}},
}, {
// Generated by Go, works on BSD tar v3.1.2 and GNU tar v.1.27.1.
file: "testdata/gnu-nil-sparse-data.tar",
headers: []*Header{{
Name: "sparse.db",
Typeflag: TypeGNUSparse,
Size: 1000,
ModTime: time.Unix(0, 0),
Format: FormatGNU,
}},
}, {
// Generated by Go, works on BSD tar v3.1.2 and GNU tar v.1.27.1.
file: "testdata/gnu-nil-sparse-hole.tar",
headers: []*Header{{
Name: "sparse.db",
Typeflag: TypeGNUSparse,
Size: 1000,
ModTime: time.Unix(0, 0),
Format: FormatGNU,
}},
}, {
// Generated by Go, works on BSD tar v3.1.2 and GNU tar v.1.27.1.
file: "testdata/pax-nil-sparse-data.tar",
headers: []*Header{{
Name: "sparse.db",
Typeflag: TypeReg,
Size: 1000,
ModTime: time.Unix(0, 0),
PAXRecords: map[string]string{
"size": "1512",
"GNU.sparse.major": "1",
"GNU.sparse.minor": "0",
"GNU.sparse.realsize": "1000",
"GNU.sparse.name": "sparse.db",
},
Format: FormatPAX,
}},
}, {
// Generated by Go, works on BSD tar v3.1.2 and GNU tar v.1.27.1.
file: "testdata/pax-nil-sparse-hole.tar",
headers: []*Header{{
Name: "sparse.db",
Typeflag: TypeReg,
Size: 1000,
ModTime: time.Unix(0, 0),
PAXRecords: map[string]string{
"size": "512",
"GNU.sparse.major": "1",
"GNU.sparse.minor": "0",
"GNU.sparse.realsize": "1000",
"GNU.sparse.name": "sparse.db",
},
Format: FormatPAX,
}},
}, {
file: "testdata/trailing-slash.tar",
headers: []*Header{{
Typeflag: TypeDir,
Name: strings.Repeat("123456789/", 30),
ModTime: time.Unix(0, 0),
PAXRecords: map[string]string{
"path": strings.Repeat("123456789/", 30),
},
Format: FormatPAX,
}},
}}
for _, v := range vectors {
t.Run(path.Base(v.file), func(t *testing.T) {
f, err := os.Open(v.file)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
defer f.Close()
// Capture all headers and checksums.
var (
tr = NewReader(f)
hdrs []*Header
chksums []string
rdbuf = make([]byte, 8)
)
for {
var hdr *Header
hdr, err = tr.Next()
if err != nil {
if err == io.EOF {
err = nil // Expected error
}
break
}
hdrs = append(hdrs, hdr)
if v.chksums == nil {
continue
}
h := md5.New()
_, err = io.CopyBuffer(h, tr, rdbuf) // Effectively an incremental read
if err != nil {
break
}
chksums = append(chksums, fmt.Sprintf("%x", h.Sum(nil)))
}
for i, hdr := range hdrs {
if i >= len(v.headers) {
t.Fatalf("entry %d: unexpected header:\ngot %+v", i, *hdr)
continue
}
if !reflect.DeepEqual(*hdr, *v.headers[i]) {
t.Fatalf("entry %d: incorrect header:\ngot %+v\nwant %+v", i, *hdr, *v.headers[i])
}
}
if len(hdrs) != len(v.headers) {
t.Fatalf("got %d headers, want %d headers", len(hdrs), len(v.headers))
}
for i, sum := range chksums {
if i >= len(v.chksums) {
t.Fatalf("entry %d: unexpected sum: got %s", i, sum)
continue
}
if sum != v.chksums[i] {
t.Fatalf("entry %d: incorrect checksum: got %s, want %s", i, sum, v.chksums[i])
}
}
if err != v.err {
t.Fatalf("unexpected error: got %v, want %v", err, v.err)
}
f.Close()
})
}
}
func TestPartialRead(t *testing.T) {
type testCase struct {
cnt int // Number of bytes to read
output string // Expected value of string read
}
vectors := []struct {
file string
cases []testCase
}{{
file: "testdata/gnu.tar",
cases: []testCase{
{4, "Kilt"},
{6, "Google"},
},
}, {
file: "testdata/sparse-formats.tar",
cases: []testCase{
{2, "\x00G"},
{4, "\x00G\x00o"},
{6, "\x00G\x00o\x00G"},
{8, "\x00G\x00o\x00G\x00o"},
{4, "end\n"},
},
}}
for _, v := range vectors {
t.Run(path.Base(v.file), func(t *testing.T) {
f, err := os.Open(v.file)
if err != nil {
t.Fatalf("Open() error: %v", err)
}
defer f.Close()
tr := NewReader(f)
for i, tc := range v.cases {
hdr, err := tr.Next()
if err != nil || hdr == nil {
t.Fatalf("entry %d, Next(): got %v, want %v", i, err, nil)
}
buf := make([]byte, tc.cnt)
if _, err := io.ReadFull(tr, buf); err != nil {
t.Fatalf("entry %d, ReadFull(): got %v, want %v", i, err, nil)
}
if string(buf) != tc.output {
t.Fatalf("entry %d, ReadFull(): got %q, want %q", i, string(buf), tc.output)
}
}
if _, err := tr.Next(); err != io.EOF {
t.Fatalf("Next(): got %v, want EOF", err)
}
})
}
}
func TestUninitializedRead(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)
_, err = tr.Read([]byte{})
if err == nil || err != io.EOF {
t.Errorf("Unexpected error: %v, wanted %v", err, io.EOF)
}
}
type reader struct{ io.Reader }
type readSeeker struct{ io.ReadSeeker }
type readBadSeeker struct{ io.ReadSeeker }
func (rbs *readBadSeeker) Seek(int64, int) (int64, error) { return 0, fmt.Errorf("illegal seek") }
// TestReadTruncation test the ending condition on various truncated files and
// that truncated files are still detected even if the underlying io.Reader
// satisfies io.Seeker.
func TestReadTruncation(t *testing.T) {
var ss []string
for _, p := range []string{
"testdata/gnu.tar",
"testdata/ustar-file-reg.tar",
"testdata/pax-path-hdr.tar",
"testdata/sparse-formats.tar",
} {
buf, err := os.ReadFile(p)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
ss = append(ss, string(buf))
}
data1, data2, pax, sparse := ss[0], ss[1], ss[2], ss[3]
data2 += strings.Repeat("\x00", 10*512)
trash := strings.Repeat("garbage ", 64) // Exactly 512 bytes
vectors := []struct {
input string // Input stream
cnt int // Expected number of headers read
err error // Expected error outcome
}{
{"", 0, io.EOF}, // Empty file is a "valid" tar file
{data1[:511], 0, io.ErrUnexpectedEOF},
{data1[:512], 1, io.ErrUnexpectedEOF},
{data1[:1024], 1, io.EOF},
{data1[:1536], 2, io.ErrUnexpectedEOF},
{data1[:2048], 2, io.EOF},
{data1, 2, io.EOF},
{data1[:2048] + data2[:1536], 3, io.EOF},
{data2[:511], 0, io.ErrUnexpectedEOF},
{data2[:512], 1, io.ErrUnexpectedEOF},
{data2[:1195], 1, io.ErrUnexpectedEOF},
{data2[:1196], 1, io.EOF}, // Exact end of data and start of padding
{data2[:1200], 1, io.EOF},
{data2[:1535], 1, io.EOF},
{data2[:1536], 1, io.EOF}, // Exact end of padding
{data2[:1536] + trash[:1], 1, io.ErrUnexpectedEOF},
{data2[:1536] + trash[:511], 1, io.ErrUnexpectedEOF},
{data2[:1536] + trash, 1, ErrHeader},
{data2[:2048], 1, io.EOF}, // Exactly 1 empty block
{data2[:2048] + trash[:1], 1, io.ErrUnexpectedEOF},
{data2[:2048] + trash[:511], 1, io.ErrUnexpectedEOF},
{data2[:2048] + trash, 1, ErrHeader},
{data2[:2560], 1, io.EOF}, // Exactly 2 empty blocks (normal end-of-stream)
{data2[:2560] + trash[:1], 1, io.EOF},
{data2[:2560] + trash[:511], 1, io.EOF},
{data2[:2560] + trash, 1, io.EOF},
{data2[:3072], 1, io.EOF},
{pax, 0, io.EOF}, // PAX header without data is a "valid" tar file
{pax + trash[:1], 0, io.ErrUnexpectedEOF},
{pax + trash[:511], 0, io.ErrUnexpectedEOF},
{sparse[:511], 0, io.ErrUnexpectedEOF},
{sparse[:512], 0, io.ErrUnexpectedEOF},
{sparse[:3584], 1, io.EOF},
{sparse[:9200], 1, io.EOF}, // Terminate in padding of sparse header
{sparse[:9216], 1, io.EOF},
{sparse[:9728], 2, io.ErrUnexpectedEOF},
{sparse[:10240], 2, io.EOF},
{sparse[:11264], 2, io.ErrUnexpectedEOF},
{sparse, 5, io.EOF},
{sparse + trash, 5, io.EOF},
}
for i, v := range vectors {
for j := 0; j < 6; j++ {
var tr *Reader
var s1, s2 string
switch j {
case 0:
tr = NewReader(&reader{strings.NewReader(v.input)})
s1, s2 = "io.Reader", "auto"
case 1:
tr = NewReader(&reader{strings.NewReader(v.input)})
s1, s2 = "io.Reader", "manual"
case 2:
tr = NewReader(&readSeeker{strings.NewReader(v.input)})
s1, s2 = "io.ReadSeeker", "auto"
case 3:
tr = NewReader(&readSeeker{strings.NewReader(v.input)})
s1, s2 = "io.ReadSeeker", "manual"
case 4:
tr = NewReader(&readBadSeeker{strings.NewReader(v.input)})
s1, s2 = "ReadBadSeeker", "auto"
case 5:
tr = NewReader(&readBadSeeker{strings.NewReader(v.input)})
s1, s2 = "ReadBadSeeker", "manual"
}
var cnt int
var err error
for {
if _, err = tr.Next(); err != nil {
break
}
cnt++
if s2 == "manual" {
if _, err = tr.writeTo(io.Discard); err != nil {
break
}
}
}
if err != v.err {
t.Errorf("test %d, NewReader(%s) with %s discard: got %v, want %v",
i, s1, s2, err, v.err)
}
if cnt != v.cnt {
t.Errorf("test %d, NewReader(%s) with %s discard: got %d headers, want %d headers",
i, s1, s2, cnt, v.cnt)
}
}
}
}
// TestReadHeaderOnly tests that Reader does not attempt to read special
// header-only files.
func TestReadHeaderOnly(t *testing.T) {
f, err := os.Open("testdata/hdr-only.tar")
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
defer f.Close()
var hdrs []*Header
tr := NewReader(f)
for {
hdr, err := tr.Next()
if err == io.EOF {
break
}
if err != nil {
t.Errorf("Next(): got %v, want %v", err, nil)
continue
}
hdrs = append(hdrs, hdr)
// If a special flag, we should read nothing.
cnt, _ := io.ReadFull(tr, []byte{0})
if cnt > 0 && hdr.Typeflag != TypeReg {
t.Errorf("ReadFull(...): got %d bytes, want 0 bytes", cnt)
}
}
// File is crafted with 16 entries. The later 8 are identical to the first
// 8 except that the size is set.
if len(hdrs) != 16 {
t.Fatalf("len(hdrs): got %d, want %d", len(hdrs), 16)
}
for i := 0; i < 8; i++ {
hdr1, hdr2 := hdrs[i+0], hdrs[i+8]
hdr1.Size, hdr2.Size = 0, 0
if !reflect.DeepEqual(*hdr1, *hdr2) {
t.Errorf("incorrect header:\ngot %+v\nwant %+v", *hdr1, *hdr2)
}
}
}
func TestMergePAX(t *testing.T) {
vectors := []struct {
in map[string]string
want *Header
ok bool
}{{
in: map[string]string{
"path": "a/b/c",
"uid": "1000",
"mtime": "1350244992.023960108",
},
want: &Header{
Name: "a/b/c",
Uid: 1000,
ModTime: time.Unix(1350244992, 23960108),
PAXRecords: map[string]string{
"path": "a/b/c",
"uid": "1000",
"mtime": "1350244992.023960108",
},
},
ok: true,
}, {
in: map[string]string{
"gid": "gtgergergersagersgers",
},
ok: false,
}, {
in: map[string]string{
"missing": "missing",
"SCHILY.xattr.key": "value",
},
want: &Header{
Xattrs: map[string]string{"key": "value"},
PAXRecords: map[string]string{
"missing": "missing",
"SCHILY.xattr.key": "value",
},
},
ok: true,
}}
for i, v := range vectors {
got := new(Header)
err := mergePAX(got, v.in)
if v.ok && !reflect.DeepEqual(*got, *v.want) {
t.Errorf("test %d, mergePAX(...):\ngot %+v\nwant %+v", i, *got, *v.want)
}
if ok := err == nil; ok != v.ok {
t.Errorf("test %d, mergePAX(...): got %v, want %v", i, ok, v.ok)
}
}
}
func TestParsePAX(t *testing.T) {
vectors := []struct {
in string
want map[string]string
ok bool
}{
{"", nil, true},
{"6 k=1\n", map[string]string{"k": "1"}, true},
{"10 a=name\n", map[string]string{"a": "name"}, true},
{"9 a=name\n", map[string]string{"a": "name"}, true},
{"30 mtime=1350244992.023960108\n", map[string]string{"mtime": "1350244992.023960108"}, true},
{"3 somelongkey=\n", nil, false},
{"50 tooshort=\n", nil, false},
{"13 key1=haha\n13 key2=nana\n13 key3=kaka\n",
map[string]string{"key1": "haha", "key2": "nana", "key3": "kaka"}, true},
{"13 key1=val1\n13 key2=val2\n8 key1=\n",
map[string]string{"key1": "", "key2": "val2"}, true},
{"22 GNU.sparse.size=10\n26 GNU.sparse.numblocks=2\n" +
"23 GNU.sparse.offset=1\n25 GNU.sparse.numbytes=2\n" +
"23 GNU.sparse.offset=3\n25 GNU.sparse.numbytes=4\n",
map[string]string{paxGNUSparseSize: "10", paxGNUSparseNumBlocks: "2", paxGNUSparseMap: "1,2,3,4"}, true},
{"22 GNU.sparse.size=10\n26 GNU.sparse.numblocks=1\n" +
"25 GNU.sparse.numbytes=2\n23 GNU.sparse.offset=1\n",
nil, false},
{"22 GNU.sparse.size=10\n26 GNU.sparse.numblocks=1\n" +
"25 GNU.sparse.offset=1,2\n25 GNU.sparse.numbytes=2\n",
nil, false},
}
for i, v := range vectors {
r := strings.NewReader(v.in)
got, err := parsePAX(r)
if !reflect.DeepEqual(got, v.want) && !(len(got) == 0 && len(v.want) == 0) {
t.Errorf("test %d, parsePAX():\ngot %v\nwant %v", i, got, v.want)
}
if ok := err == nil; ok != v.ok {
t.Errorf("test %d, parsePAX(): got %v, want %v", i, ok, v.ok)
}
}
}
func TestReadOldGNUSparseMap(t *testing.T) {
populateSparseMap := func(sa sparseArray, sps []string) []string {
for i := 0; len(sps) > 0 && i < sa.maxEntries(); i++ {
copy(sa.entry(i), sps[0])
sps = sps[1:]
}
if len(sps) > 0 {
copy(sa.isExtended(), "\x80")
}
return sps
}
makeInput := func(format Format, size string, sps ...string) (out []byte) {
// Write the initial GNU header.
var blk block
gnu := blk.toGNU()
sparse := gnu.sparse()
copy(gnu.realSize(), size)
sps = populateSparseMap(sparse, sps)
if format != FormatUnknown {
blk.setFormat(format)
}
out = append(out, blk[:]...)
// Write extended sparse blocks.
for len(sps) > 0 {
var blk block
sps = populateSparseMap(blk.toSparse(), sps)
out = append(out, blk[:]...)
}
return out
}
makeSparseStrings := func(sp []sparseEntry) (out []string) {
var f formatter
for _, s := range sp {
var b [24]byte
f.formatNumeric(b[:12], s.Offset)
f.formatNumeric(b[12:], s.Length)
out = append(out, string(b[:]))
}
return out
}
vectors := []struct {
input []byte
wantMap sparseDatas
wantSize int64
wantErr error
}{{
input: makeInput(FormatUnknown, ""),
wantErr: ErrHeader,
}, {
input: makeInput(FormatGNU, "1234", "fewa"),
wantSize: 01234,
wantErr: ErrHeader,
}, {
input: makeInput(FormatGNU, "0031"),
wantSize: 031,
}, {
input: makeInput(FormatGNU, "80"),
wantErr: ErrHeader,
}, {
input: makeInput(FormatGNU, "1234",
makeSparseStrings(sparseDatas{{0, 0}, {1, 1}})...),
wantMap: sparseDatas{{0, 0}, {1, 1}},
wantSize: 01234,
}, {
input: makeInput(FormatGNU, "1234",
append(makeSparseStrings(sparseDatas{{0, 0}, {1, 1}}), []string{"", "blah"}...)...),
wantMap: sparseDatas{{0, 0}, {1, 1}},
wantSize: 01234,
}, {
input: makeInput(FormatGNU, "3333",
makeSparseStrings(sparseDatas{{0, 1}, {2, 1}, {4, 1}, {6, 1}})...),
wantMap: sparseDatas{{0, 1}, {2, 1}, {4, 1}, {6, 1}},
wantSize: 03333,
}, {
input: makeInput(FormatGNU, "",
append(append(
makeSparseStrings(sparseDatas{{0, 1}, {2, 1}}),
[]string{"", ""}...),
makeSparseStrings(sparseDatas{{4, 1}, {6, 1}})...)...),
wantMap: sparseDatas{{0, 1}, {2, 1}, {4, 1}, {6, 1}},
}, {
input: makeInput(FormatGNU, "",
makeSparseStrings(sparseDatas{{0, 1}, {2, 1}, {4, 1}, {6, 1}, {8, 1}, {10, 1}})...)[:blockSize],
wantErr: io.ErrUnexpectedEOF,
}, {
input: makeInput(FormatGNU, "",
makeSparseStrings(sparseDatas{{0, 1}, {2, 1}, {4, 1}, {6, 1}, {8, 1}, {10, 1}})...)[:3*blockSize/2],
wantErr: io.ErrUnexpectedEOF,
}, {
input: makeInput(FormatGNU, "",
makeSparseStrings(sparseDatas{{0, 1}, {2, 1}, {4, 1}, {6, 1}, {8, 1}, {10, 1}})...),
wantMap: sparseDatas{{0, 1}, {2, 1}, {4, 1}, {6, 1}, {8, 1}, {10, 1}},
}, {
input: makeInput(FormatGNU, "",
makeSparseStrings(sparseDatas{{10 << 30, 512}, {20 << 30, 512}})...),
wantMap: sparseDatas{{10 << 30, 512}, {20 << 30, 512}},
}}
for i, v := range vectors {
var blk block
var hdr Header
v.input = v.input[copy(blk[:], v.input):]
tr := Reader{r: bytes.NewReader(v.input)}
got, err := tr.readOldGNUSparseMap(&hdr, &blk)
if !equalSparseEntries(got, v.wantMap) {
t.Errorf("test %d, readOldGNUSparseMap(): got %v, want %v", i, got, v.wantMap)
}
if err != v.wantErr {
t.Errorf("test %d, readOldGNUSparseMap() = %v, want %v", i, err, v.wantErr)
}
if hdr.Size != v.wantSize {
t.Errorf("test %d, Header.Size = %d, want %d", i, hdr.Size, v.wantSize)
}
}
}
func TestReadGNUSparsePAXHeaders(t *testing.T) {
padInput := func(s string) string {
return s + string(zeroBlock[:blockPadding(int64(len(s)))])
}
vectors := []struct {
inputData string
inputHdrs map[string]string
wantMap sparseDatas
wantSize int64
wantName string
wantErr error
}{{
inputHdrs: nil,
wantErr: nil,
}, {
inputHdrs: map[string]string{
paxGNUSparseNumBlocks: strconv.FormatInt(math.MaxInt64, 10),
paxGNUSparseMap: "0,1,2,3",
},
wantErr: ErrHeader,
}, {
inputHdrs: map[string]string{
paxGNUSparseNumBlocks: "4\x00",
paxGNUSparseMap: "0,1,2,3",
},
wantErr: ErrHeader,
}, {
inputHdrs: map[string]string{
paxGNUSparseNumBlocks: "4",
paxGNUSparseMap: "0,1,2,3",
},
wantErr: ErrHeader,
}, {
inputHdrs: map[string]string{
paxGNUSparseNumBlocks: "2",
paxGNUSparseMap: "0,1,2,3",
},
wantMap: sparseDatas{{0, 1}, {2, 3}},
}, {
inputHdrs: map[string]string{
paxGNUSparseNumBlocks: "2",
paxGNUSparseMap: "0, 1,2,3",
},
wantErr: ErrHeader,
}, {
inputHdrs: map[string]string{
paxGNUSparseNumBlocks: "2",
paxGNUSparseMap: "0,1,02,3",
paxGNUSparseRealSize: "4321",
},
wantMap: sparseDatas{{0, 1}, {2, 3}},
wantSize: 4321,
}, {
inputHdrs: map[string]string{
paxGNUSparseNumBlocks: "2",
paxGNUSparseMap: "0,one1,2,3",
},
wantErr: ErrHeader,
}, {
inputHdrs: map[string]string{
paxGNUSparseMajor: "0",
paxGNUSparseMinor: "0",
paxGNUSparseNumBlocks: "2",
paxGNUSparseMap: "0,1,2,3",
paxGNUSparseSize: "1234",
paxGNUSparseRealSize: "4321",
paxGNUSparseName: "realname",
},
wantMap: sparseDatas{{0, 1}, {2, 3}},
wantSize: 1234,
wantName: "realname",
}, {
inputHdrs: map[string]string{
paxGNUSparseMajor: "0",
paxGNUSparseMinor: "0",
paxGNUSparseNumBlocks: "1",
paxGNUSparseMap: "10737418240,512",
paxGNUSparseSize: "10737418240",
paxGNUSparseName: "realname",
},
wantMap: sparseDatas{{10737418240, 512}},
wantSize: 10737418240,
wantName: "realname",
}, {
inputHdrs: map[string]string{
paxGNUSparseMajor: "0",
paxGNUSparseMinor: "0",
paxGNUSparseNumBlocks: "0",
paxGNUSparseMap: "",
},
wantMap: sparseDatas{},
}, {
inputHdrs: map[string]string{
paxGNUSparseMajor: "0",
paxGNUSparseMinor: "1",
paxGNUSparseNumBlocks: "4",
paxGNUSparseMap: "0,5,10,5,20,5,30,5",
},
wantMap: sparseDatas{{0, 5}, {10, 5}, {20, 5}, {30, 5}},
}, {
inputHdrs: map[string]string{
paxGNUSparseMajor: "1",
paxGNUSparseMinor: "0",
paxGNUSparseNumBlocks: "4",
paxGNUSparseMap: "0,5,10,5,20,5,30,5",
},
wantErr: io.ErrUnexpectedEOF,
}, {
inputData: padInput("0\n"),
inputHdrs: map[string]string{paxGNUSparseMajor: "1", paxGNUSparseMinor: "0"},
wantMap: sparseDatas{},
}, {
inputData: padInput("0\n")[:blockSize-1] + "#",
inputHdrs: map[string]string{paxGNUSparseMajor: "1", paxGNUSparseMinor: "0"},
wantMap: sparseDatas{},
}, {
inputData: padInput("0"),
inputHdrs: map[string]string{paxGNUSparseMajor: "1", paxGNUSparseMinor: "0"},
wantErr: io.ErrUnexpectedEOF,
}, {
inputData: padInput("ab\n"),
inputHdrs: map[string]string{paxGNUSparseMajor: "1", paxGNUSparseMinor: "0"},
wantErr: ErrHeader,
}, {
inputData: padInput("1\n2\n3\n"),
inputHdrs: map[string]string{paxGNUSparseMajor: "1", paxGNUSparseMinor: "0"},
wantMap: sparseDatas{{2, 3}},
}, {
inputData: padInput("1\n2\n"),
inputHdrs: map[string]string{paxGNUSparseMajor: "1", paxGNUSparseMinor: "0"},
wantErr: io.ErrUnexpectedEOF,
}, {
inputData: padInput("1\n2\n\n"),
inputHdrs: map[string]string{paxGNUSparseMajor: "1", paxGNUSparseMinor: "0"},
wantErr: ErrHeader,
}, {
inputData: string(zeroBlock[:]) + padInput("0\n"),
inputHdrs: map[string]string{paxGNUSparseMajor: "1", paxGNUSparseMinor: "0"},
wantErr: ErrHeader,
}, {
inputData: strings.Repeat("0", blockSize) + padInput("1\n5\n1\n"),
inputHdrs: map[string]string{paxGNUSparseMajor: "1", paxGNUSparseMinor: "0"},
wantMap: sparseDatas{{5, 1}},
}, {
inputData: padInput(fmt.Sprintf("%d\n", int64(math.MaxInt64))),
inputHdrs: map[string]string{paxGNUSparseMajor: "1", paxGNUSparseMinor: "0"},
wantErr: ErrHeader,
}, {
inputData: padInput(strings.Repeat("0", 300) + "1\n" + strings.Repeat("0", 1000) + "5\n" + strings.Repeat("0", 800) + "2\n"),
inputHdrs: map[string]string{paxGNUSparseMajor: "1", paxGNUSparseMinor: "0"},
wantMap: sparseDatas{{5, 2}},
}, {
inputData: padInput("2\n10737418240\n512\n21474836480\n512\n"),
inputHdrs: map[string]string{paxGNUSparseMajor: "1", paxGNUSparseMinor: "0"},
wantMap: sparseDatas{{10737418240, 512}, {21474836480, 512}},
}, {
inputData: padInput("100\n" + func() string {
var ss []string
for i := 0; i < 100; i++ {
ss = append(ss, fmt.Sprintf("%d\n%d\n", int64(i)<<30, 512))
}
return strings.Join(ss, "")
}()),
inputHdrs: map[string]string{paxGNUSparseMajor: "1", paxGNUSparseMinor: "0"},
wantMap: func() (spd sparseDatas) {
for i := 0; i < 100; i++ {
spd = append(spd, sparseEntry{int64(i) << 30, 512})
}
return spd
}(),
}}
for i, v := range vectors {
var hdr Header
hdr.PAXRecords = v.inputHdrs
r := strings.NewReader(v.inputData + "#") // Add canary byte
tr := Reader{curr: ®FileReader{r, int64(r.Len())}}
got, err := tr.readGNUSparsePAXHeaders(&hdr)
if !equalSparseEntries(got, v.wantMap) {
t.Errorf("test %d, readGNUSparsePAXHeaders(): got %v, want %v", i, got, v.wantMap)
}
if err != v.wantErr {
t.Errorf("test %d, readGNUSparsePAXHeaders() = %v, want %v", i, err, v.wantErr)
}
if hdr.Size != v.wantSize {
t.Errorf("test %d, Header.Size = %d, want %d", i, hdr.Size, v.wantSize)
}
if hdr.Name != v.wantName {
t.Errorf("test %d, Header.Name = %s, want %s", i, hdr.Name, v.wantName)
}
if v.wantErr == nil && r.Len() == 0 {
t.Errorf("test %d, canary byte unexpectedly consumed", i)
}
}
}
// testNonEmptyReader wraps an io.Reader and ensures that
// Read is never called with an empty buffer.
type testNonEmptyReader struct{ io.Reader }
func (r testNonEmptyReader) Read(b []byte) (int, error) {
if len(b) == 0 {
return 0, errors.New("unexpected empty Read call")
}
return r.Reader.Read(b)
}
func TestFileReader(t *testing.T) {
type (
testRead struct { // Read(cnt) == (wantStr, wantErr)
cnt int
wantStr string
wantErr error
}
testWriteTo struct { // WriteTo(testFile{ops}) == (wantCnt, wantErr)
ops fileOps
wantCnt int64
wantErr error
}
testRemaining struct { // logicalRemaining() == wantLCnt, physicalRemaining() == wantPCnt
wantLCnt int64
wantPCnt int64
}
testFnc any // testRead | testWriteTo | testRemaining
)
type (
makeReg struct {
str string
size int64
}
makeSparse struct {
makeReg makeReg
spd sparseDatas
size int64
}
fileMaker any // makeReg | makeSparse
)
vectors := []struct {
maker fileMaker
tests []testFnc
}{{
maker: makeReg{"", 0},
tests: []testFnc{
testRemaining{0, 0},
testRead{0, "", io.EOF},
testRead{1, "", io.EOF},
testWriteTo{nil, 0, nil},
testRemaining{0, 0},
},
}, {
maker: makeReg{"", 1},
tests: []testFnc{
testRemaining{1, 1},
testRead{5, "", io.ErrUnexpectedEOF},
testWriteTo{nil, 0, io.ErrUnexpectedEOF},
testRemaining{1, 1},
},
}, {
maker: makeReg{"hello", 5},
tests: []testFnc{
testRemaining{5, 5},
testRead{5, "hello", io.EOF},
testRemaining{0, 0},
},
}, {
maker: makeReg{"hello, world", 50},
tests: []testFnc{
testRemaining{50, 50},
testRead{7, "hello, ", nil},
testRemaining{43, 43},
testRead{5, "world", nil},
testRemaining{38, 38},
testWriteTo{nil, 0, io.ErrUnexpectedEOF},
testRead{1, "", io.ErrUnexpectedEOF},
testRemaining{38, 38},
},
}, {
maker: makeReg{"hello, world", 5},
tests: []testFnc{
testRemaining{5, 5},
testRead{0, "", nil},
testRead{4, "hell", nil},
testRemaining{1, 1},
testWriteTo{fileOps{"o"}, 1, nil},
testRemaining{0, 0},
testWriteTo{nil, 0, nil},
testRead{0, "", io.EOF},
},
}, {
maker: makeSparse{makeReg{"abcde", 5}, sparseDatas{{0, 2}, {5, 3}}, 8},
tests: []testFnc{
testRemaining{8, 5},
testRead{3, "ab\x00", nil},
testRead{10, "\x00\x00cde", io.EOF},
testRemaining{0, 0},
},
}, {
maker: makeSparse{makeReg{"abcde", 5}, sparseDatas{{0, 2}, {5, 3}}, 8},
tests: []testFnc{
testRemaining{8, 5},
testWriteTo{fileOps{"ab", int64(3), "cde"}, 8, nil},
testRemaining{0, 0},
},
}, {
maker: makeSparse{makeReg{"abcde", 5}, sparseDatas{{0, 2}, {5, 3}}, 10},
tests: []testFnc{
testRemaining{10, 5},
testRead{100, "ab\x00\x00\x00cde\x00\x00", io.EOF},
testRemaining{0, 0},
},
}, {
maker: makeSparse{makeReg{"abc", 5}, sparseDatas{{0, 2}, {5, 3}}, 10},
tests: []testFnc{
testRemaining{10, 5},
testRead{100, "ab\x00\x00\x00c", io.ErrUnexpectedEOF},
testRemaining{4, 2},
},
}, {
maker: makeSparse{makeReg{"abcde", 5}, sparseDatas{{1, 3}, {6, 2}}, 8},
tests: []testFnc{
testRemaining{8, 5},
testRead{8, "\x00abc\x00\x00de", io.EOF},
testRemaining{0, 0},
},
}, {
maker: makeSparse{makeReg{"abcde", 5}, sparseDatas{{1, 3}, {6, 0}, {6, 0}, {6, 2}}, 8},
tests: []testFnc{
testRemaining{8, 5},
testRead{8, "\x00abc\x00\x00de", io.EOF},
testRemaining{0, 0},
},
}, {
maker: makeSparse{makeReg{"abcde", 5}, sparseDatas{{1, 3}, {6, 0}, {6, 0}, {6, 2}}, 8},
tests: []testFnc{
testRemaining{8, 5},
testWriteTo{fileOps{int64(1), "abc", int64(2), "de"}, 8, nil},
testRemaining{0, 0},
},
}, {
maker: makeSparse{makeReg{"abcde", 5}, sparseDatas{{1, 3}, {6, 2}}, 10},
tests: []testFnc{
testRead{100, "\x00abc\x00\x00de\x00\x00", io.EOF},
},
}, {
maker: makeSparse{makeReg{"abcde", 5}, sparseDatas{{1, 3}, {6, 2}}, 10},
tests: []testFnc{
testWriteTo{fileOps{int64(1), "abc", int64(2), "de", int64(1), "\x00"}, 10, nil},
},
}, {
maker: makeSparse{makeReg{"abcde", 5}, sparseDatas{{1, 3}, {6, 2}, {8, 0}, {8, 0}, {8, 0}, {8, 0}}, 10},
tests: []testFnc{
testRead{100, "\x00abc\x00\x00de\x00\x00", io.EOF},
},
}, {
maker: makeSparse{makeReg{"", 0}, sparseDatas{}, 2},
tests: []testFnc{
testRead{100, "\x00\x00", io.EOF},
},
}, {
maker: makeSparse{makeReg{"", 8}, sparseDatas{{1, 3}, {6, 5}}, 15},
tests: []testFnc{
testRead{100, "\x00", io.ErrUnexpectedEOF},
},
}, {
maker: makeSparse{makeReg{"ab", 2}, sparseDatas{{1, 3}, {6, 5}}, 15},
tests: []testFnc{
testRead{100, "\x00ab", errMissData},
},
}, {
maker: makeSparse{makeReg{"ab", 8}, sparseDatas{{1, 3}, {6, 5}}, 15},
tests: []testFnc{
testRead{100, "\x00ab", io.ErrUnexpectedEOF},
},
}, {
maker: makeSparse{makeReg{"abc", 3}, sparseDatas{{1, 3}, {6, 5}}, 15},
tests: []testFnc{
testRead{100, "\x00abc\x00\x00", errMissData},
},
}, {
maker: makeSparse{makeReg{"abc", 8}, sparseDatas{{1, 3}, {6, 5}}, 15},
tests: []testFnc{
testRead{100, "\x00abc\x00\x00", io.ErrUnexpectedEOF},
},
}, {
maker: makeSparse{makeReg{"abcde", 5}, sparseDatas{{1, 3}, {6, 5}}, 15},
tests: []testFnc{
testRead{100, "\x00abc\x00\x00de", errMissData},
},
}, {
maker: makeSparse{makeReg{"abcde", 5}, sparseDatas{{1, 3}, {6, 5}}, 15},
tests: []testFnc{
testWriteTo{fileOps{int64(1), "abc", int64(2), "de"}, 8, errMissData},
},
}, {
maker: makeSparse{makeReg{"abcde", 8}, sparseDatas{{1, 3}, {6, 5}}, 15},
tests: []testFnc{
testRead{100, "\x00abc\x00\x00de", io.ErrUnexpectedEOF},
},
}, {
maker: makeSparse{makeReg{"abcdefghEXTRA", 13}, sparseDatas{{1, 3}, {6, 5}}, 15},
tests: []testFnc{
testRemaining{15, 13},
testRead{100, "\x00abc\x00\x00defgh\x00\x00\x00\x00", errUnrefData},
testWriteTo{nil, 0, errUnrefData},
testRemaining{0, 5},
},
}, {
maker: makeSparse{makeReg{"abcdefghEXTRA", 13}, sparseDatas{{1, 3}, {6, 5}}, 15},
tests: []testFnc{
testRemaining{15, 13},
testWriteTo{fileOps{int64(1), "abc", int64(2), "defgh", int64(4)}, 15, errUnrefData},
testRead{100, "", errUnrefData},
testRemaining{0, 5},
},
}}
for i, v := range vectors {
var fr fileReader
switch maker := v.maker.(type) {
case makeReg:
r := testNonEmptyReader{strings.NewReader(maker.str)}
fr = ®FileReader{r, maker.size}
case makeSparse:
if !validateSparseEntries(maker.spd, maker.size) {
t.Fatalf("invalid sparse map: %v", maker.spd)
}
sph := invertSparseEntries(maker.spd, maker.size)
r := testNonEmptyReader{strings.NewReader(maker.makeReg.str)}
fr = ®FileReader{r, maker.makeReg.size}
fr = &sparseFileReader{fr, sph, 0}
default:
t.Fatalf("test %d, unknown make operation: %T", i, maker)
}
for j, tf := range v.tests {
switch tf := tf.(type) {
case testRead:
b := make([]byte, tf.cnt)
n, err := fr.Read(b)
if got := string(b[:n]); got != tf.wantStr || err != tf.wantErr {
t.Errorf("test %d.%d, Read(%d):\ngot (%q, %v)\nwant (%q, %v)", i, j, tf.cnt, got, err, tf.wantStr, tf.wantErr)
}
case testWriteTo:
f := &testFile{ops: tf.ops}
got, err := fr.WriteTo(f)
if _, ok := err.(testError); ok {
t.Errorf("test %d.%d, WriteTo(): %v", i, j, err)
} else if got != tf.wantCnt || err != tf.wantErr {
t.Errorf("test %d.%d, WriteTo() = (%d, %v), want (%d, %v)", i, j, got, err, tf.wantCnt, tf.wantErr)
}
if len(f.ops) > 0 {
t.Errorf("test %d.%d, expected %d more operations", i, j, len(f.ops))
}
case testRemaining:
if got := fr.logicalRemaining(); got != tf.wantLCnt {
t.Errorf("test %d.%d, logicalRemaining() = %d, want %d", i, j, got, tf.wantLCnt)
}
if got := fr.physicalRemaining(); got != tf.wantPCnt {
t.Errorf("test %d.%d, physicalRemaining() = %d, want %d", i, j, got, tf.wantPCnt)
}
default:
t.Fatalf("test %d.%d, unknown test operation: %T", i, j, tf)
}
}
}
}
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