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
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
// Copyright 2010 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 json
import (
"bytes"
"io/ioutil"
"net"
"reflect"
"strings"
"testing"
)
// Test values for the stream test.
// One of each JSON kind.
var streamTest = []interface{}{
0.1,
"hello",
nil,
true,
false,
[]interface{}{"a", "b", "c"},
map[string]interface{}{"K": "Kelvin", "ß": "long s"},
3.14, // another value to make sure something can follow map
}
var streamEncoded = `0.1
"hello"
null
true
false
["a","b","c"]
{"ß":"long s","K":"Kelvin"}
3.14
`
func TestEncoder(t *testing.T) {
for i := 0; i <= len(streamTest); i++ {
var buf bytes.Buffer
enc := NewEncoder(&buf)
for j, v := range streamTest[0:i] {
if err := enc.Encode(v); err != nil {
t.Fatalf("encode #%d: %v", j, err)
}
}
if have, want := buf.String(), nlines(streamEncoded, i); have != want {
t.Errorf("encoding %d items: mismatch", i)
diff(t, []byte(have), []byte(want))
break
}
}
}
func TestDecoder(t *testing.T) {
for i := 0; i <= len(streamTest); i++ {
// Use stream without newlines as input,
// just to stress the decoder even more.
// Our test input does not include back-to-back numbers.
// Otherwise stripping the newlines would
// merge two adjacent JSON values.
var buf bytes.Buffer
for _, c := range nlines(streamEncoded, i) {
if c != '\n' {
buf.WriteRune(c)
}
}
out := make([]interface{}, i)
dec := NewDecoder(&buf)
for j := range out {
if err := dec.Decode(&out[j]); err != nil {
t.Fatalf("decode #%d/%d: %v", j, i, err)
}
}
if !reflect.DeepEqual(out, streamTest[0:i]) {
t.Errorf("decoding %d items: mismatch", i)
for j := range out {
if !reflect.DeepEqual(out[j], streamTest[j]) {
t.Errorf("#%d: have %v want %v", j, out[j], streamTest[j])
}
}
break
}
}
}
func TestDecoderBuffered(t *testing.T) {
r := strings.NewReader(`{"Name": "Gopher"} extra `)
var m struct {
Name string
}
d := NewDecoder(r)
err := d.Decode(&m)
if err != nil {
t.Fatal(err)
}
if m.Name != "Gopher" {
t.Errorf("Name = %q; want Gopher", m.Name)
}
rest, err := ioutil.ReadAll(d.Buffered())
if err != nil {
t.Fatal(err)
}
if g, w := string(rest), " extra "; g != w {
t.Errorf("Remaining = %q; want %q", g, w)
}
}
func nlines(s string, n int) string {
if n <= 0 {
return ""
}
for i, c := range s {
if c == '\n' {
if n--; n == 0 {
return s[0 : i+1]
}
}
}
return s
}
func TestRawMessage(t *testing.T) {
// TODO(rsc): Should not need the * in *RawMessage
var data struct {
X float64
Id *RawMessage
Y float32
}
const raw = `["\u0056",null]`
const msg = `{"X":0.1,"Id":["\u0056",null],"Y":0.2}`
err := Unmarshal([]byte(msg), &data)
if err != nil {
t.Fatalf("Unmarshal: %v", err)
}
if string([]byte(*data.Id)) != raw {
t.Fatalf("Raw mismatch: have %#q want %#q", []byte(*data.Id), raw)
}
b, err := Marshal(&data)
if err != nil {
t.Fatalf("Marshal: %v", err)
}
if string(b) != msg {
t.Fatalf("Marshal: have %#q want %#q", b, msg)
}
}
func TestNullRawMessage(t *testing.T) {
// TODO(rsc): Should not need the * in *RawMessage
var data struct {
X float64
Id *RawMessage
Y float32
}
data.Id = new(RawMessage)
const msg = `{"X":0.1,"Id":null,"Y":0.2}`
err := Unmarshal([]byte(msg), &data)
if err != nil {
t.Fatalf("Unmarshal: %v", err)
}
if data.Id != nil {
t.Fatalf("Raw mismatch: have non-nil, want nil")
}
b, err := Marshal(&data)
if err != nil {
t.Fatalf("Marshal: %v", err)
}
if string(b) != msg {
t.Fatalf("Marshal: have %#q want %#q", b, msg)
}
}
var blockingTests = []string{
`{"x": 1}`,
`[1, 2, 3]`,
}
func TestBlocking(t *testing.T) {
for _, enc := range blockingTests {
r, w := net.Pipe()
go w.Write([]byte(enc))
var val interface{}
// If Decode reads beyond what w.Write writes above,
// it will block, and the test will deadlock.
if err := NewDecoder(r).Decode(&val); err != nil {
t.Errorf("decoding %s: %v", enc, err)
}
r.Close()
w.Close()
}
}
func BenchmarkEncoderEncode(b *testing.B) {
b.ReportAllocs()
type T struct {
X, Y string
}
v := &T{"foo", "bar"}
for i := 0; i < b.N; i++ {
if err := NewEncoder(ioutil.Discard).Encode(v); err != nil {
b.Fatal(err)
}
}
}
|
