forked from git-lfs/git-lfs
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathgitscanner_pointerscanner_test.go
More file actions
137 lines (111 loc) · 3.38 KB
/
gitscanner_pointerscanner_test.go
File metadata and controls
137 lines (111 loc) · 3.38 KB
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
package lfs
import (
"bytes"
"crypto/sha256"
"encoding/hex"
"fmt"
"io"
"math/rand"
"testing"
"github.com/git-lfs/git-lfs/v3/git"
"github.com/git-lfs/gitobj/v2"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestPointerScannerWithValidOutput(t *testing.T) {
blobs := []*Pointer{
&Pointer{
Version: "https://git-lfs.github.com/spec/v1",
Oid: "e71eefd918ea175b8f362611f981f648dbf9888ff74865077cb4c9077728f350",
Size: 123,
OidType: "sha256",
},
&Pointer{
Version: "https://git-lfs.github.com/spec/v1",
Oid: "0eb69b651be65d5a61d6bebf2c53c811a5bf8031951111000e2077f4d7fe43b1",
Size: 132,
OidType: "sha256",
},
}
be, _ := gitobj.NewMemoryBackend(nil)
db, _ := gitobj.FromBackend(be)
shas := fakeObjectsWithRandoData(t, db, blobs)
scanner := &PointerScanner{
scanner: git.NewObjectScannerFrom(db),
}
iter := 0
for i := 0; i < 5; i++ {
assertNextEmptyPointer(t, scanner, shas[iter])
iter++
}
assertNextPointer(t, scanner, shas[iter], "e71eefd918ea175b8f362611f981f648dbf9888ff74865077cb4c9077728f350")
iter++
for i := 0; i < 5; i++ {
assertNextEmptyPointer(t, scanner, shas[iter])
iter++
}
assertNextPointer(t, scanner, shas[iter], "0eb69b651be65d5a61d6bebf2c53c811a5bf8031951111000e2077f4d7fe43b1")
iter++
for i := 0; i < 5; i++ {
assertNextEmptyPointer(t, scanner, shas[iter])
iter++
}
}
func TestPointerScannerWithLargeBlobs(t *testing.T) {
buf := bytes.NewBuffer(make([]byte, 0, 1025))
sha := sha256.New()
rng := rand.New(rand.NewSource(0))
_, err := io.CopyN(io.MultiWriter(sha, buf), rng, 1025)
require.Nil(t, err)
be, _ := gitobj.NewMemoryBackend(nil)
db, _ := gitobj.FromBackend(be)
fake := bytes.NewBuffer(nil)
oid := writeFakeBuffer(t, db, fake, buf.Bytes(), buf.Len())
scanner := &PointerScanner{
scanner: git.NewObjectScannerFrom(db),
}
require.True(t, scanner.Scan(oid))
assert.Nil(t, scanner.Pointer())
assert.Equal(t, fmt.Sprintf("%x", sha.Sum(nil)), scanner.ContentsSha())
}
func assertNextPointer(t *testing.T, scanner *PointerScanner, sha string, oid string) {
assert.True(t, scanner.Scan(sha))
assert.Nil(t, scanner.Err())
p := scanner.Pointer()
assert.NotNil(t, p)
assert.Equal(t, oid, p.Oid)
}
func assertNextEmptyPointer(t *testing.T, scanner *PointerScanner, sha string) {
assert.True(t, scanner.Scan(sha))
assert.Nil(t, scanner.Err())
assert.Nil(t, scanner.Pointer())
}
func fakeObjectsWithRandoData(t *testing.T, db *gitobj.ObjectDatabase, blobs []*Pointer) []string {
buf := &bytes.Buffer{}
rngbuf := make([]byte, 1000) // just under blob size cutoff
rng := rand.New(rand.NewSource(0))
oids := make([]string, 0)
for i := 0; i < 5; i++ {
n, err := io.ReadFull(rng, rngbuf)
if err != nil {
t.Fatalf("error reading from rng: %+v", err)
}
oids = append(oids, writeFakeBuffer(t, db, buf, rngbuf, n))
}
for _, b := range blobs {
ptrtext := b.Encoded()
oids = append(oids, writeFakeBuffer(t, db, buf, []byte(ptrtext), len(ptrtext)))
for i := 0; i < 5; i++ {
n, err := io.ReadFull(rng, rngbuf)
if err != nil {
t.Fatalf("error reading from rng: %+v", err)
}
oids = append(oids, writeFakeBuffer(t, db, buf, rngbuf, n))
}
}
return oids
}
func writeFakeBuffer(t *testing.T, db *gitobj.ObjectDatabase, buf *bytes.Buffer, by []byte, size int) string {
oid, _ := db.WriteBlob(gitobj.NewBlobFromBytes(by))
return hex.EncodeToString(oid)
}