1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
//go:build linux
// +build linux
package chunked
import (
"bufio"
"bytes"
"encoding/json"
"fmt"
"io"
"testing"
"github.com/containers/storage/pkg/chunked/internal"
)
func TestIsZstdChunkedFrameMagic(t *testing.T) {
b := append(internal.ZstdChunkedFrameMagic[:], make([]byte, 200)...)
if !isZstdChunkedFrameMagic(b) {
t.Fatal("Chunked frame magic not found")
}
// change a byte
b[0] = -b[0]
if isZstdChunkedFrameMagic(b) {
t.Fatal("Invalid chunked frame magic found")
}
}
type seekable struct {
data []byte
offset uint64
length uint64
t *testing.T
}
func (s seekable) GetBlobAt(req []ImageSourceChunk) (chan io.ReadCloser, chan error, error) {
if len(req) != 1 {
s.t.Fatal("Requested more than one chunk")
}
if req[0].Offset != s.offset {
s.t.Fatal("Invalid offset requested")
}
if req[0].Length != s.length {
s.t.Fatal("Invalid length requested")
}
m := make(chan io.ReadCloser)
e := make(chan error)
go func() {
m <- io.NopCloser(bytes.NewReader(s.data))
close(m)
close(e)
}()
return m, e, nil
}
var someFiles = []internal.FileMetadata{
{
Type: "dir",
Name: "/foo",
Mode: 0755,
Size: 0,
},
{
Type: "reg",
Name: "/foo/bar",
Mode: 0755,
Size: 10,
Digest: "sha256:5891b5b522d5df086d0ff0b110fbd9d21bb4fc7163af34d08286a2e846f6be03",
Offset: 100,
EndOffset: 110,
ChunkSize: 10,
ChunkDigest: "sha256:5891b5b522d5df086d0ff0b110fbd9d21bb4fc7163af34d08286a2e846f6be03",
ChunkOffset: 0,
},
{
Type: "reg",
Name: "/foo/baz",
Mode: 0755,
Size: 12,
Digest: "sha256:6f0378f21a495f5c13247317d158e9d51da45a5bf68fc2f366e450deafdc8302",
Offset: 200,
EndOffset: 212,
ChunkSize: 12,
ChunkDigest: "sha256:6f0378f21a495f5c13247317d158e9d51da45a5bf68fc2f366e450deafdc8302",
ChunkOffset: 0,
},
}
func TestGenerateAndParseManifest(t *testing.T) {
annotations := make(map[string]string)
offsetManifest := uint64(100000)
var b bytes.Buffer
writer := bufio.NewWriter(&b)
if err := internal.WriteZstdChunkedManifest(writer, annotations, offsetManifest, someFiles[:], 9); err != nil {
t.Error(err)
}
if err := writer.Flush(); err != nil {
t.Error(err)
}
offsetMetadata := annotations[internal.ManifestInfoKey]
if offsetMetadata == "" {
t.Fatal("Annotation not found")
}
var offset, length, lengthUncompressed, manifestType uint64
if _, err := fmt.Sscanf(offsetMetadata, "%d:%d:%d:%d", &offset, &length, &lengthUncompressed, &manifestType); err != nil {
t.Error(err)
}
if offset != offsetManifest+8 {
t.Fatalf("Invalid offset %d", offset)
}
if manifestType != internal.ManifestTypeCRFS {
t.Fatalf("Invalid manifest type %d", manifestType)
}
if b.Len() == 0 {
t.Fatal("no manifest written")
}
data := b.Bytes()[offset-offsetManifest:]
s := seekable{
data: data,
offset: offset,
length: length,
t: t,
}
manifest, _, err := readZstdChunkedManifest(s, 8192, annotations)
if err != nil {
t.Error(err)
}
var toc internal.TOC
if err := json.Unmarshal(manifest, &toc); err != nil {
t.Error(err)
}
if toc.Version != 1 {
t.Fatal("Invalid manifest version generated")
}
if len(toc.Entries) != len(someFiles) {
t.Fatal("Manifest mismatch")
}
}
func TestGetTarType(t *testing.T) {
for k, v := range typesToTar {
r, err := typeToTarType(k)
if err != nil {
t.Error(err)
}
if r != v {
t.Fatal("Invalid typeToTarType conversion")
}
}
if _, err := typeToTarType("FOO"); err == nil {
t.Fatal("Invalid typeToTarType conversion")
}
for k, v := range internal.TarTypes {
r, err := internal.GetType(k)
if err != nil {
t.Error(err)
}
if r != v {
t.Fatal("Invalid GetType conversion")
}
}
if _, err := internal.GetType(byte('Z')); err == nil {
t.Fatal("Invalid GetType conversion")
}
}
|
