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
|
// Copyright (C) 2023 Luke Shumaker <lukeshu@lukeshu.com>
//
// SPDX-License-Identifier: GPL-2.0-or-later
package json_test
import (
"bytes"
std "encoding/json"
"errors"
"io"
"strconv"
"strings"
"testing"
"unicode/utf8"
"github.com/stretchr/testify/assert"
low "git.lukeshu.com/go/lowmemjson/compat/json"
)
func assertEquivErr(t *testing.T, stdErr, lowErr error) {
if (stdErr == nil) || (lowErr == nil) {
// Nil-equal.
assert.Equal(t, stdErr, lowErr)
return
}
switch stdErr.(type) {
case *std.SyntaxError:
if lowErr != nil {
stdMsg := stdErr.Error()
lowMsg := lowErr.Error()
// https://github.com/golang/go/issues/58680
if strings.HasPrefix(stdMsg, `invalid character ' ' `) &&
(errors.Is(lowErr, io.ErrUnexpectedEOF) || lowMsg == "unexpected end of JSON input") {
return
}
// https://github.com/golang/go/issues/58713
prefix := `invalid character '`
if stdMsg != lowMsg && strings.HasPrefix(stdMsg, prefix) && strings.HasPrefix(lowMsg, prefix) {
stdRune, stdRuneSize := utf8.DecodeRuneInString(stdMsg[len(prefix):])
lowByte := lowMsg[len(prefix)]
if lowByte == '\\' {
switch lowMsg[len(prefix)+1] {
case 'a':
lowByte = '\a'
case 'b':
lowByte = '\b'
case 'f':
lowByte = '\f'
case 'n':
lowByte = '\n'
case 'r':
lowByte = '\r'
case 't':
lowByte = '\t'
case 'v':
lowByte = '\v'
case '\\', '\'':
lowByte = lowMsg[len(prefix)+1]
case 'x':
lowByte64, _ := strconv.ParseUint(lowMsg[len(prefix)+2:][:2], 16, 8)
lowByte = byte(lowByte64)
case 'u':
lowRune, _ := strconv.ParseUint(lowMsg[len(prefix)+2:][:4], 16, 16)
var buf [4]byte
utf8.EncodeRune(buf[:], rune(lowRune))
lowByte = buf[0]
case 'U':
lowRune, _ := strconv.ParseUint(lowMsg[len(prefix)+2:][:8], 16, 32)
var buf [4]byte
utf8.EncodeRune(buf[:], rune(lowRune))
lowByte = buf[0]
}
}
if stdRune == rune(lowByte) {
lowRuneStr := lowMsg[len(prefix):]
lowRuneStr = lowRuneStr[:strings.IndexByte(lowRuneStr, '\'')]
stdMsg = prefix + lowRuneStr + stdMsg[len(prefix)+stdRuneSize:]
stdErr = errors.New(stdMsg)
}
}
// I'd file a ticket for this, but @dsnet (one of the encoding/json maintainers) says that he's
// working on a parser-rewrite that would fix a bunch of this type of issue.
// https://github.com/golang/go/issues/58680#issuecomment-1444224084
if strings.HasPrefix(stdMsg, `invalid character '\u00`) && strings.HasPrefix(lowMsg, `invalid character '\x`) {
stdMsg = `invalid character '\x` + strings.TrimPrefix(stdMsg, `invalid character '\u00`)
stdErr = errors.New(stdMsg)
}
}
// Text-equal.
assert.Equal(t, stdErr.Error(), lowErr.Error())
// TODO: Assert that they are deep-equal (but be permissive of these not being type aliases).
case *std.MarshalerError:
// Text-equal.
assert.Equal(t, stdErr.Error(), lowErr.Error())
// TODO: Assert that they are deep-equal (but be permissive of these not being type aliases).
default:
// Text-equal.
assert.Equal(t, stdErr.Error(), lowErr.Error())
// TODO: Assert that they are deep-equal.
}
}
func FuzzEquiv(f *testing.F) {
f.Fuzz(func(t *testing.T, str []byte) {
t.Logf("str=%q", str)
t.Run("HTMLEscape", func(t *testing.T) {
var stdOut bytes.Buffer
std.HTMLEscape(&stdOut, str)
var lowOut bytes.Buffer
low.HTMLEscape(&lowOut, str)
assert.Equal(t, stdOut.String(), lowOut.String())
})
t.Run("Compact", func(t *testing.T) {
var stdOut bytes.Buffer
stdErr := std.Compact(&stdOut, str)
var lowOut bytes.Buffer
lowErr := low.Compact(&lowOut, str)
assert.Equal(t, stdOut.String(), lowOut.String())
assertEquivErr(t, stdErr, lowErr)
})
t.Run("Indent", func(t *testing.T) {
var stdOut bytes.Buffer
stdErr := std.Indent(&stdOut, str, "»", "\t")
var lowOut bytes.Buffer
lowErr := low.Indent(&lowOut, str, "»", "\t")
assert.Equal(t, stdOut.String(), lowOut.String())
assertEquivErr(t, stdErr, lowErr)
})
t.Run("Valid", func(t *testing.T) {
stdValid := std.Valid(str) && utf8.Valid(str) // https://github.com/golang/go/issues/58517
lowValid := low.Valid(str)
assert.Equal(t, stdValid, lowValid)
})
t.Run("Decode-Encode", func(t *testing.T) {
var stdObj any
stdErr := std.NewDecoder(bytes.NewReader(str)).Decode(&stdObj)
var lowObj any
lowErr := low.NewDecoder(bytes.NewReader(str)).Decode(&lowObj)
assert.Equal(t, stdObj, lowObj)
assertEquivErr(t, stdErr, lowErr)
if t.Failed() {
return
}
var stdOut bytes.Buffer
stdErr = std.NewEncoder(&stdOut).Encode(stdObj)
var lowOut bytes.Buffer
lowErr = low.NewEncoder(&lowOut).Encode(lowObj)
assert.Equal(t, stdOut.String(), lowOut.String())
assertEquivErr(t, stdErr, lowErr)
})
t.Run("Unmarshal-Marshal", func(t *testing.T) {
var stdObj any
stdErr := std.Unmarshal(str, &stdObj)
var lowObj any
lowErr := low.Unmarshal(str, &lowObj)
assert.Equal(t, stdObj, lowObj)
assertEquivErr(t, stdErr, lowErr)
if t.Failed() {
return
}
stdOut, stdErr := std.Marshal(stdObj)
lowOut, lowErr := low.Marshal(lowObj)
assert.Equal(t, string(stdOut), string(lowOut))
assertEquivErr(t, stdErr, lowErr)
})
})
}
|