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
|
package json // import "github.com/tdewolff/parse/json"
import (
"bytes"
"fmt"
"io"
"testing"
"github.com/tdewolff/parse"
"github.com/tdewolff/test"
)
type GTs []GrammarType
func TestGrammars(t *testing.T) {
var grammarTests = []struct {
json string
expected []GrammarType
}{
{" \t\n\r", GTs{}}, // WhitespaceGrammar
{"null", GTs{LiteralGrammar}},
{"[]", GTs{StartArrayGrammar, EndArrayGrammar}},
{"15.2", GTs{NumberGrammar}},
{"0.4", GTs{NumberGrammar}},
{"5e9", GTs{NumberGrammar}},
{"-4E-3", GTs{NumberGrammar}},
{"true", GTs{LiteralGrammar}},
{"false", GTs{LiteralGrammar}},
{"null", GTs{LiteralGrammar}},
{`""`, GTs{StringGrammar}},
{`"abc"`, GTs{StringGrammar}},
{`"\""`, GTs{StringGrammar}},
{`"\\"`, GTs{StringGrammar}},
{"{}", GTs{StartObjectGrammar, EndObjectGrammar}},
{`{"a": "b", "c": "d"}`, GTs{StartObjectGrammar, StringGrammar, StringGrammar, StringGrammar, StringGrammar, EndObjectGrammar}},
{`{"a": [1, 2], "b": {"c": 3}}`, GTs{StartObjectGrammar, StringGrammar, StartArrayGrammar, NumberGrammar, NumberGrammar, EndArrayGrammar, StringGrammar, StartObjectGrammar, StringGrammar, NumberGrammar, EndObjectGrammar, EndObjectGrammar}},
{"[null,]", GTs{StartArrayGrammar, LiteralGrammar, EndArrayGrammar}},
// {"[\"x\\\x00y\", 0]", GTs{StartArrayGrammar, StringGrammar, NumberGrammar, EndArrayGrammar}},
}
for _, tt := range grammarTests {
t.Run(tt.json, func(t *testing.T) {
p := NewParser(bytes.NewBufferString(tt.json))
i := 0
for {
grammar, _ := p.Next()
if grammar == ErrorGrammar {
test.T(t, p.Err(), io.EOF)
test.T(t, i, len(tt.expected), "when error occurred we must be at the end")
break
} else if grammar == WhitespaceGrammar {
continue
}
test.That(t, i < len(tt.expected), "index", i, "must not exceed expected grammar types size", len(tt.expected))
if i < len(tt.expected) {
test.T(t, grammar, tt.expected[i], "grammar types must match")
}
i++
}
})
}
test.T(t, WhitespaceGrammar.String(), "Whitespace")
test.T(t, GrammarType(100).String(), "Invalid(100)")
test.T(t, ValueState.String(), "Value")
test.T(t, ObjectKeyState.String(), "ObjectKey")
test.T(t, ObjectValueState.String(), "ObjectValue")
test.T(t, ArrayState.String(), "Array")
test.T(t, State(100).String(), "Invalid(100)")
}
func TestGrammarsError(t *testing.T) {
var grammarErrorTests = []struct {
json string
col int
}{
{"true, false", 5},
{"[true false]", 7},
{"]", 1},
{"}", 1},
{"{0: 1}", 2},
{"{\"a\" 1}", 6},
{"1.", 2},
{"1e+", 2},
{`{"":"`, 0},
{"\"a\\", 0},
}
for _, tt := range grammarErrorTests {
t.Run(tt.json, func(t *testing.T) {
p := NewParser(bytes.NewBufferString(tt.json))
for {
grammar, _ := p.Next()
if grammar == ErrorGrammar {
if tt.col == 0 {
test.T(t, p.Err(), io.EOF)
} else if perr, ok := p.Err().(*parse.Error); ok {
_, col, _ := perr.Position()
test.T(t, col, tt.col)
} else {
test.Fail(t, "bad error:", p.Err())
}
break
}
}
})
}
}
func TestStates(t *testing.T) {
var stateTests = []struct {
json string
expected []State
}{
{"null", []State{ValueState}},
{"[null]", []State{ArrayState, ArrayState, ValueState}},
{"{\"\":null}", []State{ObjectKeyState, ObjectValueState, ObjectKeyState, ValueState}},
}
for _, tt := range stateTests {
t.Run(tt.json, func(t *testing.T) {
p := NewParser(bytes.NewBufferString(tt.json))
i := 0
for {
grammar, _ := p.Next()
state := p.State()
if grammar == ErrorGrammar {
test.T(t, p.Err(), io.EOF)
test.T(t, i, len(tt.expected), "when error occurred we must be at the end")
break
} else if grammar == WhitespaceGrammar {
continue
}
test.That(t, i < len(tt.expected), "index", i, "must not exceed expected states size", len(tt.expected))
if i < len(tt.expected) {
test.T(t, state, tt.expected[i], "states must match")
}
i++
}
})
}
}
////////////////////////////////////////////////////////////////
func ExampleNewParser() {
p := NewParser(bytes.NewBufferString(`{"key": 5}`))
out := ""
for {
state := p.State()
gt, data := p.Next()
if gt == ErrorGrammar {
break
}
out += string(data)
if state == ObjectKeyState && gt != EndObjectGrammar {
out += ":"
}
// not handling comma insertion
}
fmt.Println(out)
// Output: {"key":5}
}
|
