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
|
package librsync // import "code.laria.me/golibrsync/librsync"
import (
"bytes"
"code.laria.me/golibrsync/librsync/testdata"
"io"
"testing"
)
func TestSignatureDeltaPatch(t *testing.T) {
// Generate signature
orig := bytes.NewReader(testdata.RandomData())
sigbuf := new(bytes.Buffer)
siggen, err := NewDefaultSignatureGen(orig)
if err != nil {
t.Fatalf("could not create a signature generator: %s", err)
}
defer siggen.Close()
if _, err = io.Copy(sigbuf, siggen); err != nil {
t.Fatalf("Creating the signature failed: %s", err)
}
matches := false
// Check both possible signatures.
for _, sigcheck := range testdata.RandomDataSig() {
if bytes.Equal(sigbuf.Bytes(), sigcheck) {
matches = true
}
}
if !matches {
if path, err := dump(sigbuf); err == nil {
t.Fatalf("Signatures do not match. Generated signature dumped to %s", path)
} else {
t.Fatalf("Signatures do not match. Could not dump signature: %s", err)
}
}
// Loading signature
sig, err := LoadSignature(sigbuf)
if err != nil {
t.Fatalf("Loading signature failed: %s", err)
}
defer sig.Close()
// Generate delta
mutation := bytes.NewReader(testdata.Mutation())
deltabuf := new(bytes.Buffer)
deltagen, err := NewDeltaGen(sig, mutation)
if err != nil {
t.Fatalf("could not create a delta generator: %s", err)
}
defer deltagen.Close()
if _, err = io.Copy(deltabuf, deltagen); err != nil {
t.Fatalf("Creating the delta failed: %s", err)
}
if !bytes.Equal(deltabuf.Bytes(), testdata.Delta()) {
if path, err := dump(deltabuf); err == nil {
t.Fatalf("deltas do not match. Generated delta dumped to %s", path)
} else {
t.Fatalf("deltas do not match. Could not dump delta: %s", err)
}
}
// Apply Patch
patchres := new(bytes.Buffer)
patcher, err := NewPatcher(deltabuf, orig)
if err != nil {
t.Fatalf("could not create a patcher: %s", err)
}
defer patcher.Close()
if _, err = io.Copy(patchres, patcher); err != nil {
t.Fatalf("Applying the patch failed: %s", err)
}
if !bytes.Equal(patchres.Bytes(), testdata.Mutation()) {
if path, err := dump(patchres); err == nil {
t.Fatalf("patch result and mutation are not equal. Result dumped to %s", path)
} else {
t.Fatalf("patch result and mutation are not equal. Could not dump result: %s", err)
}
}
}
|
