1
// Copyright 2009 The Go Authors. All rights reserved.
2
// Use of this source code is governed by a BSD-style
3
// license that can be found in the LICENSE file.
14
type testpair struct {
15
decoded, encoded string
18
func testEqual(t *testing.T, msg string, args ...interface{}) bool {
19
if args[len(args)-2] != args[len(args)-1] {
20
t.Errorf(msg, args...)
26
func TestGitTable(t *testing.T) {
28
for i, c := range encode {
29
if decode[c] != uint8(i+1) {
30
t.Errorf("decode['%c'] = %d, want %d", c, decode[c], i+1)
34
for i, b := range saw {
35
if !b && decode[i] != 0 {
36
t.Errorf("decode[%d] = %d, want 0", i, decode[i])
41
var gitPairs = []testpair{
42
// Wikipedia example, adapted.
44
"Man is distinguished, not only by his reason, but by this singular passion from " +
45
"other animals, which is a lust of the mind, that by a perseverance of delight in " +
46
"the continued and indefatigable generation of knowledge, exceeds the short " +
47
"vehemence of any carnal pleasure.",
49
"zO<`^zX>%ZCX>)XGZfA9Ab7*B`EFf-gbRchTY<VDJc_3(Mb0BhMVRLV8EFfZabRc4R\n" +
50
"zAarPHb0BkRZfA9DVR9gFVRLh7Z*CxFa&K)QZ**v7av))DX>DO_b1WctXlY|;AZc?T\n" +
51
"zVIXXEb95kYW*~HEWgu;7Ze%PVbZB98AYyqSVIXj2a&u*NWpZI|V`U(3W*}r`Y-wj`\n" +
52
"zbRcPNAarPDAY*TCbZKsNWn>^>Ze$>7Ze(R<VRUI{VPb4$AZKN6WpZJ3X>V>IZ)PBC\n" +
53
"zZf|#NWn^b%EFfigV`XJzb0BnRWgv5CZ*p`Xc4cT~ZDnp_Wgu^6AYpEKAY);2ZeeU7\n" +
58
var gitBigtest = gitPairs[len(gitPairs)-1]
60
func TestEncode(t *testing.T) {
61
for _, p := range gitPairs {
62
buf := make([]byte, EncodedLen(len(p.decoded)))
63
n := Encode(buf, []byte(p.decoded))
65
t.Errorf("EncodedLen does not agree with Encode")
68
testEqual(t, "Encode(%q) = %q, want %q", p.decoded, string(buf), p.encoded)
72
func TestEncoder(t *testing.T) {
73
for _, p := range gitPairs {
75
encoder := NewEncoder(bb)
76
encoder.Write([]byte(p.decoded))
78
testEqual(t, "Encode(%q) = %q, want %q", p.decoded, bb.String(), p.encoded)
82
func TestEncoderBuffering(t *testing.T) {
83
input := []byte(gitBigtest.decoded)
84
for bs := 1; bs <= 12; bs++ {
86
encoder := NewEncoder(bb)
87
for pos := 0; pos < len(input); pos += bs {
92
n, err := encoder.Write(input[pos:end])
93
testEqual(t, "Write(%q) gave error %v, want %v", input[pos:end], err, os.Error(nil))
94
testEqual(t, "Write(%q) gave length %v, want %v", input[pos:end], n, end-pos)
96
err := encoder.Close()
97
testEqual(t, "Close gave error %v, want %v", err, os.Error(nil))
98
testEqual(t, "Encoding/%d of %q = %q, want %q", bs, gitBigtest.decoded, bb.String(), gitBigtest.encoded)
102
func TestDecode(t *testing.T) {
103
for _, p := range gitPairs {
104
dbuf := make([]byte, 4*len(p.encoded))
105
ndst, err := Decode(dbuf, []byte(p.encoded))
106
testEqual(t, "Decode(%q) = error %v, want %v", p.encoded, err, os.Error(nil))
107
testEqual(t, "Decode(%q) = ndst %v, want %v", p.encoded, ndst, len(p.decoded))
108
testEqual(t, "Decode(%q) = %q, want %q", p.encoded, string(dbuf[0:ndst]), p.decoded)
112
func TestDecoder(t *testing.T) {
113
for _, p := range gitPairs {
114
decoder := NewDecoder(bytes.NewBufferString(p.encoded))
115
dbuf, err := ioutil.ReadAll(decoder)
117
t.Fatal("Read failed", err)
119
testEqual(t, "Read from %q = length %v, want %v", p.encoded, len(dbuf), len(p.decoded))
120
testEqual(t, "Decoding of %q = %q, want %q", p.encoded, string(dbuf), p.decoded)
122
testEqual(t, "Read from %q = %v, want %v", p.encoded, err, os.EOF)
127
func TestDecoderBuffering(t *testing.T) {
128
for bs := 1; bs <= 12; bs++ {
129
decoder := NewDecoder(bytes.NewBufferString(gitBigtest.encoded))
130
buf := make([]byte, len(gitBigtest.decoded)+12)
132
for total = 0; total < len(gitBigtest.decoded); {
133
n, err := decoder.Read(buf[total : total+bs])
134
testEqual(t, "Read from %q at pos %d = %d, %v, want _, %v", gitBigtest.encoded, total, n, err, os.Error(nil))
137
testEqual(t, "Decoding/%d of %q = %q, want %q", bs, gitBigtest.encoded, string(buf[0:total]), gitBigtest.decoded)
141
func TestDecodeCorrupt(t *testing.T) {
142
type corrupt struct {
146
examples := []corrupt{
151
for _, e := range examples {
152
dbuf := make([]byte, 2*len(e.e))
153
_, err := Decode(dbuf, []byte(e.e))
154
switch err := err.(type) {
155
case CorruptInputError:
156
testEqual(t, "Corruption in %q at offset %v, want %v", e.e, int(err), e.p)
158
t.Error("Decoder failed to detect corruption in", e)
163
func TestGitBig(t *testing.T) {
165
raw := make([]byte, n)
166
const alpha = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
167
for i := 0; i < n; i++ {
168
raw[i] = alpha[i%len(alpha)]
170
encoded := new(bytes.Buffer)
171
w := NewEncoder(encoded)
172
nn, err := w.Write(raw)
173
if nn != n || err != nil {
174
t.Fatalf("Encoder.Write(raw) = %d, %v want %d, nil", nn, err, n)
178
t.Fatalf("Encoder.Close() = %v want nil", err)
180
decoded, err := ioutil.ReadAll(NewDecoder(encoded))
182
t.Fatalf("ioutil.ReadAll(NewDecoder(...)): %v", err)
185
if !bytes.Equal(raw, decoded) {
187
for i = 0; i < len(decoded) && i < len(raw); i++ {
188
if decoded[i] != raw[i] {
192
t.Errorf("Decode(Encode(%d-byte string)) failed at offset %d", n, i)