1 // Copyright 2010 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.
15 // Tests of simple examples.
22 var examples = []example{
26 {`{"":2}`, "{\n\t\"\": 2\n}"},
28 {`[1,2,3]`, "[\n\t1,\n\t2,\n\t3\n]"},
29 {`{"x":1}`, "{\n\t\"x\": 1\n}"},
33 var ex1 = `[true,false,null,"x",1,1.5,0,-5e+2]`
46 func TestCompact(t *testing.T) {
48 for _, tt := range examples {
50 if err := Compact(&buf, []byte(tt.compact)); err != nil {
51 t.Errorf("Compact(%#q): %v", tt.compact, err)
52 } else if s := buf.String(); s != tt.compact {
53 t.Errorf("Compact(%#q) = %#q, want original", tt.compact, s)
57 if err := Compact(&buf, []byte(tt.indent)); err != nil {
58 t.Errorf("Compact(%#q): %v", tt.indent, err)
60 } else if s := buf.String(); s != tt.compact {
61 t.Errorf("Compact(%#q) = %#q, want %#q", tt.indent, s, tt.compact)
66 func TestIndent(t *testing.T) {
68 for _, tt := range examples {
70 if err := Indent(&buf, []byte(tt.indent), "", "\t"); err != nil {
71 t.Errorf("Indent(%#q): %v", tt.indent, err)
72 } else if s := buf.String(); s != tt.indent {
73 t.Errorf("Indent(%#q) = %#q, want original", tt.indent, s)
77 if err := Indent(&buf, []byte(tt.compact), "", "\t"); err != nil {
78 t.Errorf("Indent(%#q): %v", tt.compact, err)
80 } else if s := buf.String(); s != tt.indent {
81 t.Errorf("Indent(%#q) = %#q, want %#q", tt.compact, s, tt.indent)
86 // Tests of a large random structure.
88 func TestCompactBig(t *testing.T) {
91 if err := Compact(&buf, jsonBig); err != nil {
92 t.Fatalf("Compact: %v", err)
95 if bytes.Compare(b, jsonBig) != 0 {
96 t.Error("Compact(jsonBig) != jsonBig")
102 func TestIndentBig(t *testing.T) {
105 if err := Indent(&buf, jsonBig, "", "\t"); err != nil {
106 t.Fatalf("Indent1: %v", err)
109 if len(b) == len(jsonBig) {
110 // jsonBig is compact (no unnecessary spaces);
111 // indenting should make it bigger
112 t.Fatalf("Indent(jsonBig) did not get bigger")
115 // should be idempotent
116 var buf1 bytes.Buffer
117 if err := Indent(&buf1, b, "", "\t"); err != nil {
118 t.Fatalf("Indent2: %v", err)
121 if bytes.Compare(b1, b) != 0 {
122 t.Error("Indent(Indent(jsonBig)) != Indent(jsonBig)")
127 // should get back to original
129 if err := Compact(&buf1, b); err != nil {
130 t.Fatalf("Compact: %v", err)
133 if bytes.Compare(b1, jsonBig) != 0 {
134 t.Error("Compact(Indent(jsonBig)) != jsonBig")
140 type indentErrorTest struct {
145 var indentErrorTests = []indentErrorTest{
146 {`{"X": "foo", "Y"}`, &SyntaxError{"invalid character '}' after object key", 17}},
147 {`{"X": "foo" "Y": "bar"}`, &SyntaxError{"invalid character '\"' after object key:value pair", 13}},
150 func TestIdentErrors(t *testing.T) {
151 for i, tt := range indentErrorTests {
152 slice := make([]uint8, 0)
153 buf := bytes.NewBuffer(slice)
154 if err := Indent(buf, []uint8(tt.in), "", ""); err != nil {
155 if !reflect.DeepEqual(err, tt.err) {
156 t.Errorf("#%d: Indent: %#v", i, err)
163 func TestNextValueBig(t *testing.T) {
166 item, rest, err := nextValue(jsonBig, &scan)
168 t.Fatalf("nextValue: %s", err)
170 if len(item) != len(jsonBig) || &item[0] != &jsonBig[0] {
171 t.Errorf("invalid item: %d %d", len(item), len(jsonBig))
174 t.Errorf("invalid rest: %d", len(rest))
177 item, rest, err = nextValue(append(jsonBig, "HELLO WORLD"...), &scan)
179 t.Fatalf("nextValue extra: %s", err)
181 if len(item) != len(jsonBig) {
182 t.Errorf("invalid item: %d %d", len(item), len(jsonBig))
184 if string(rest) != "HELLO WORLD" {
185 t.Errorf("invalid rest: %d", len(rest))
189 func BenchmarkSkipValue(b *testing.B) {
192 for i := 0; i < b.N; i++ {
193 nextValue(jsonBig, &scan)
195 b.SetBytes(int64(len(jsonBig)))
198 func diff(t *testing.T, a, b []byte) {
200 if i >= len(a) || i >= len(b) || a[i] != b[i] {
205 t.Errorf("diverge at %d: «%s» vs «%s»", i, trim(a[j:]), trim(b[j:]))
211 func trim(b []byte) []byte {
218 // Generate a random JSON object.
232 if len(jsonBig) != n {
233 b, err := Marshal(genValue(n))
241 func genValue(n int) interface{} {
243 switch rand.Intn(2) {
250 switch rand.Intn(3) {
252 return rand.Intn(2) == 0
254 return rand.NormFloat64()
261 func genString(stddev float64) string {
262 n := int(math.Abs(rand.NormFloat64()*stddev + stddev/2))
265 f := math.Abs(rand.NormFloat64()*64 + 32)
274 func genArray(n int) []interface{} {
275 f := int(math.Abs(rand.NormFloat64()) * math.Min(10, float64(n/2)))
282 x := make([]interface{}, f)
284 x[i] = genValue(((i+1)*n)/f - (i*n)/f)
289 func genMap(n int) map[string]interface{} {
290 f := int(math.Abs(rand.NormFloat64()) * math.Min(10, float64(n/2)))
297 x := make(map[string]interface{})
298 for i := 0; i < f; i++ {
299 x[genString(10)] = genValue(((i+1)*n)/f - (i*n)/f)