json2csv/json2csv_test.go at master · mengbiping/json2csv · GitHub

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
package json2csv

import (
	"archive/zip"
	"bytes"
	"encoding/json"
	"math"
	"os"
	"reflect"
	"testing"
)

// Decode JSON with UseNumber option.
func json2obj(jsonstr string) (interface{}, error) {
	r := bytes.NewReader([]byte(jsonstr))
	d := json.NewDecoder(r)
	d.UseNumber()
	var obj interface{}
	if err := d.Decode(&obj); err != nil {
		return nil, err
	}
	return obj, nil
}

var testJSON2CSVCases = []struct {
	json     string
	expected []KeyValue
	err      string
}{
	{
		`[
			{"id": 1, "name": "foo"},
			{"id": 2, "name": "bar"}
		]`,
		[]KeyValue{
			{"/id": json.Number("1"), "/name": "foo"},
			{"/id": json.Number("2"), "/name": "bar"},
		},
		``,
	},
	{
		`[
			{"id": 1, "name/a": "foo"},
			{"id": 2, "name~b": "bar"}
		]`,
		[]KeyValue{
			{"/id": json.Number("1"), "/name~1a": "foo"},
			{"/id": json.Number("2"), "/name~0b": "bar"},
		},
		``,
	},
	{
		`[
			{"id":1, "values":["a", "b"]},
			{"id":2, "values":["x"]}
		]`,
		[]KeyValue{
			{"/id": json.Number("1"), "/values/0": "a", "/values/1": "b"},
			{"/id": json.Number("2"), "/values/0": "x"},
		},
		``,
	},
	{
		`[
			{"id":1, "values":[]},
			{"id":2, "values":["x"]}
		]`,
		[]KeyValue{
			{"/id": json.Number("1")},
			{"/id": json.Number("2"), "/values/0": "x"},
		},
		``,
	},
	{
		`[
			{"id":1, "values":{}},
			{"id":2, "values":["x"]}
		]`,
		[]KeyValue{
			{"/id": json.Number("1")},
			{"/id": json.Number("2"), "/values/0": "x"},
		},
		``,
	},
	{
		`{
			"id": 123,
			"values": [
				{"foo": "FOO"},
				{"bar": "BAR"}
			]
		}`,
		[]KeyValue{
			{"/id": json.Number("123"), "/values/0/foo": "FOO", "/values/1/bar": "BAR"},
		},
		``,
	},
	{
		`[]`,
		[]KeyValue{},
		``,
	},
	{
		`{}`,
		[]KeyValue{},
		``,
	},
	{
		`{"large_int_value": 146163870300}`,
		[]KeyValue{{"/large_int_value": json.Number("146163870300")}},
		``,
	},
	{
		`{"float_value": 146163870.300}`,
		[]KeyValue{{"/float_value": json.Number("146163870.300")}},
		``,
	},
	{`"foo"`, nil, `Unsupported JSON structure.`},
	{`123`, nil, `Unsupported JSON structure.`},
	{`true`, nil, `Unsupported JSON structure.`},
}

func TestJSON2CSV(t *testing.T) {
	csvHeader := CSVHeader{}
	var actual []KeyValue
	for caseIndex, testCase := range testJSON2CSVCases {
		obj, err := json2obj(testCase.json)
		if err != nil {
			t.Fatal(err)
		}
		actual, err = JSON2CSV(obj, csvHeader, math.MaxInt)
		if err != nil {
			if err.Error() != testCase.err {
				t.Errorf("%d: Expected %v, but %v", caseIndex, testCase.err, err)
			}
		} else if !reflect.DeepEqual(testCase.expected, actual) {
			t.Errorf("%d: Expected %#v, but %#v", caseIndex, testCase.expected, actual)
		}
	}
}

func TestJSON2CSVOnline(t *testing.T) {
	// extract csvHeader
	zipReader, err := zip.OpenReader("test.zip")
	reader := NewJSONStreamZipReader(zipReader)
	csvHeader, err := JSON2CSVHeader(reader, "", math.MaxInt)
	if err != nil {
		t.Errorf("Exception: %v", err)
		return
	}

	// extract row
	output, err := os.Create("test.csv")
	if err != nil {
		t.Errorf("Exception: %v", err)
	}
	reader = NewJSONStreamZipReader(zipReader)
	err = JSON2CSVOnline(reader, csvHeader, output, DotBracketStyle, false, "", math.MaxInt)
	if err != nil {
		t.Errorf("ExceptionL %v", err)
	}
	err = zipReader.Close()
	if err != nil {
		t.Errorf("ExceptionL %v", err)
	}
}