Timo Vetter
0f52b860ea
All checks were successful
Build Docker and Deploy / Run goext test-suite (push) Successful in 56s
475 lines
11 KiB
Go
475 lines
11 KiB
Go
// 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"
|
||
"log"
|
||
"net"
|
||
"net/http"
|
||
"net/http/httptest"
|
||
"reflect"
|
||
"strings"
|
||
"testing"
|
||
)
|
||
|
||
// Test values for the stream test.
|
||
// One of each JSON kind.
|
||
var streamTest = []any{
|
||
0.1,
|
||
"hello",
|
||
nil,
|
||
true,
|
||
false,
|
||
[]any{"a", "b", "c"},
|
||
map[string]any{"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)
|
||
// Check that enc.SetIndent("", "") turns off indentation.
|
||
enc.SetIndent(">", ".")
|
||
enc.SetIndent("", "")
|
||
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
|
||
}
|
||
}
|
||
}
|
||
|
||
var streamEncodedIndent = `0.1
|
||
"hello"
|
||
null
|
||
true
|
||
false
|
||
[
|
||
>."a",
|
||
>."b",
|
||
>."c"
|
||
>]
|
||
{
|
||
>."ß": "long s",
|
||
>."K": "Kelvin"
|
||
>}
|
||
3.14
|
||
`
|
||
|
||
func TestEncoderIndent(t *testing.T) {
|
||
var buf bytes.Buffer
|
||
enc := NewEncoder(&buf)
|
||
enc.SetIndent(">", ".")
|
||
for _, v := range streamTest {
|
||
enc.Encode(v)
|
||
}
|
||
if have, want := buf.String(), streamEncodedIndent; have != want {
|
||
t.Error("indented encoding mismatch")
|
||
diff(t, []byte(have), []byte(want))
|
||
}
|
||
}
|
||
|
||
type strMarshaler string
|
||
|
||
func (s strMarshaler) MarshalJSON() ([]byte, error) {
|
||
return []byte(s), nil
|
||
}
|
||
|
||
type strPtrMarshaler string
|
||
|
||
func (s *strPtrMarshaler) MarshalJSON() ([]byte, error) {
|
||
return []byte(*s), nil
|
||
}
|
||
|
||
func TestEncoderSetEscapeHTML(t *testing.T) {
|
||
var c C
|
||
var ct CText
|
||
var tagStruct struct {
|
||
Valid int `json:"<>&#! "`
|
||
Invalid int `json:"\\"`
|
||
}
|
||
|
||
// This case is particularly interesting, as we force the encoder to
|
||
// take the address of the Ptr field to use its MarshalJSON method. This
|
||
// is why the '&' is important.
|
||
marshalerStruct := &struct {
|
||
NonPtr strMarshaler
|
||
Ptr strPtrMarshaler
|
||
}{`"<str>"`, `"<str>"`}
|
||
|
||
// https://golang.org/issue/34154
|
||
stringOption := struct {
|
||
Bar string `json:"bar,string"`
|
||
}{`<html>foobar</html>`}
|
||
|
||
for _, tt := range []struct {
|
||
name string
|
||
v any
|
||
wantEscape string
|
||
want string
|
||
}{
|
||
{"c", c, `"\u003c\u0026\u003e"`, `"<&>"`},
|
||
{"ct", ct, `"\"\u003c\u0026\u003e\""`, `"\"<&>\""`},
|
||
{`"<&>"`, "<&>", `"\u003c\u0026\u003e"`, `"<&>"`},
|
||
{
|
||
"tagStruct", tagStruct,
|
||
`{"\u003c\u003e\u0026#! ":0,"Invalid":0}`,
|
||
`{"<>&#! ":0,"Invalid":0}`,
|
||
},
|
||
{
|
||
`"<str>"`, marshalerStruct,
|
||
`{"NonPtr":"\u003cstr\u003e","Ptr":"\u003cstr\u003e"}`,
|
||
`{"NonPtr":"<str>","Ptr":"<str>"}`,
|
||
},
|
||
{
|
||
"stringOption", stringOption,
|
||
`{"bar":"\"\\u003chtml\\u003efoobar\\u003c/html\\u003e\""}`,
|
||
`{"bar":"\"<html>foobar</html>\""}`,
|
||
},
|
||
} {
|
||
var buf bytes.Buffer
|
||
enc := NewEncoder(&buf)
|
||
if err := enc.Encode(tt.v); err != nil {
|
||
t.Errorf("Encode(%s): %s", tt.name, err)
|
||
continue
|
||
}
|
||
if got := strings.TrimSpace(buf.String()); got != tt.wantEscape {
|
||
t.Errorf("Encode(%s) = %#q, want %#q", tt.name, got, tt.wantEscape)
|
||
}
|
||
buf.Reset()
|
||
enc.SetEscapeHTML(false)
|
||
if err := enc.Encode(tt.v); err != nil {
|
||
t.Errorf("SetEscapeHTML(false) Encode(%s): %s", tt.name, err)
|
||
continue
|
||
}
|
||
if got := strings.TrimSpace(buf.String()); got != tt.want {
|
||
t.Errorf("SetEscapeHTML(false) Encode(%s) = %#q, want %#q",
|
||
tt.name, got, tt.want)
|
||
}
|
||
}
|
||
}
|
||
|
||
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([]any, 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 := io.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) {
|
||
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) {
|
||
var data struct {
|
||
X float64
|
||
Id RawMessage
|
||
IdPtr *RawMessage
|
||
Y float32
|
||
}
|
||
const msg = `{"X":0.1,"Id":null,"IdPtr":null,"Y":0.2}`
|
||
err := Unmarshal([]byte(msg), &data)
|
||
if err != nil {
|
||
t.Fatalf("Unmarshal: %v", err)
|
||
}
|
||
if want, got := "null", string(data.Id); want != got {
|
||
t.Fatalf("Raw mismatch: have %q, want %q", got, want)
|
||
}
|
||
if data.IdPtr != nil {
|
||
t.Fatalf("Raw pointer 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 any
|
||
|
||
// 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"}
|
||
b.RunParallel(func(pb *testing.PB) {
|
||
for pb.Next() {
|
||
if err := NewEncoder(io.Discard).Encode(v); err != nil {
|
||
b.Fatal(err)
|
||
}
|
||
}
|
||
})
|
||
}
|
||
|
||
type tokenStreamCase struct {
|
||
json string
|
||
expTokens []any
|
||
}
|
||
|
||
type decodeThis struct {
|
||
v any
|
||
}
|
||
|
||
var tokenStreamCases = []tokenStreamCase{
|
||
// streaming token cases
|
||
{json: `10`, expTokens: []any{float64(10)}},
|
||
{json: ` [10] `, expTokens: []any{
|
||
Delim('['), float64(10), Delim(']')}},
|
||
{json: ` [false,10,"b"] `, expTokens: []any{
|
||
Delim('['), false, float64(10), "b", Delim(']')}},
|
||
{json: `{ "a": 1 }`, expTokens: []any{
|
||
Delim('{'), "a", float64(1), Delim('}')}},
|
||
{json: `{"a": 1, "b":"3"}`, expTokens: []any{
|
||
Delim('{'), "a", float64(1), "b", "3", Delim('}')}},
|
||
{json: ` [{"a": 1},{"a": 2}] `, expTokens: []any{
|
||
Delim('['),
|
||
Delim('{'), "a", float64(1), Delim('}'),
|
||
Delim('{'), "a", float64(2), Delim('}'),
|
||
Delim(']')}},
|
||
{json: `{"obj": {"a": 1}}`, expTokens: []any{
|
||
Delim('{'), "obj", Delim('{'), "a", float64(1), Delim('}'),
|
||
Delim('}')}},
|
||
{json: `{"obj": [{"a": 1}]}`, expTokens: []any{
|
||
Delim('{'), "obj", Delim('['),
|
||
Delim('{'), "a", float64(1), Delim('}'),
|
||
Delim(']'), Delim('}')}},
|
||
|
||
// streaming tokens with intermittent Decode()
|
||
{json: `{ "a": 1 }`, expTokens: []any{
|
||
Delim('{'), "a",
|
||
decodeThis{float64(1)},
|
||
Delim('}')}},
|
||
{json: ` [ { "a" : 1 } ] `, expTokens: []any{
|
||
Delim('['),
|
||
decodeThis{map[string]any{"a": float64(1)}},
|
||
Delim(']')}},
|
||
{json: ` [{"a": 1},{"a": 2}] `, expTokens: []any{
|
||
Delim('['),
|
||
decodeThis{map[string]any{"a": float64(1)}},
|
||
decodeThis{map[string]any{"a": float64(2)}},
|
||
Delim(']')}},
|
||
{json: `{ "obj" : [ { "a" : 1 } ] }`, expTokens: []any{
|
||
Delim('{'), "obj", Delim('['),
|
||
decodeThis{map[string]any{"a": float64(1)}},
|
||
Delim(']'), Delim('}')}},
|
||
|
||
{json: `{"obj": {"a": 1}}`, expTokens: []any{
|
||
Delim('{'), "obj",
|
||
decodeThis{map[string]any{"a": float64(1)}},
|
||
Delim('}')}},
|
||
{json: `{"obj": [{"a": 1}]}`, expTokens: []any{
|
||
Delim('{'), "obj",
|
||
decodeThis{[]any{
|
||
map[string]any{"a": float64(1)},
|
||
}},
|
||
Delim('}')}},
|
||
{json: ` [{"a": 1} {"a": 2}] `, expTokens: []any{
|
||
Delim('['),
|
||
decodeThis{map[string]any{"a": float64(1)}},
|
||
decodeThis{&SyntaxError{"expected comma after array element", 11}},
|
||
}},
|
||
{json: `{ "` + strings.Repeat("a", 513) + `" 1 }`, expTokens: []any{
|
||
Delim('{'), strings.Repeat("a", 513),
|
||
decodeThis{&SyntaxError{"expected colon after object key", 518}},
|
||
}},
|
||
{json: `{ "\a" }`, expTokens: []any{
|
||
Delim('{'),
|
||
&SyntaxError{"invalid character 'a' in string escape code", 3},
|
||
}},
|
||
{json: ` \a`, expTokens: []any{
|
||
&SyntaxError{"invalid character '\\\\' looking for beginning of value", 1},
|
||
}},
|
||
}
|
||
|
||
func TestDecodeInStream(t *testing.T) {
|
||
for ci, tcase := range tokenStreamCases {
|
||
|
||
dec := NewDecoder(strings.NewReader(tcase.json))
|
||
for i, etk := range tcase.expTokens {
|
||
|
||
var tk any
|
||
var err error
|
||
|
||
if dt, ok := etk.(decodeThis); ok {
|
||
etk = dt.v
|
||
err = dec.Decode(&tk)
|
||
} else {
|
||
tk, err = dec.Token()
|
||
}
|
||
if experr, ok := etk.(error); ok {
|
||
if err == nil || !reflect.DeepEqual(err, experr) {
|
||
t.Errorf("case %v: Expected error %#v in %q, but was %#v", ci, experr, tcase.json, err)
|
||
}
|
||
break
|
||
} else if err == io.EOF {
|
||
t.Errorf("case %v: Unexpected EOF in %q", ci, tcase.json)
|
||
break
|
||
} else if err != nil {
|
||
t.Errorf("case %v: Unexpected error '%#v' in %q", ci, err, tcase.json)
|
||
break
|
||
}
|
||
if !reflect.DeepEqual(tk, etk) {
|
||
t.Errorf(`case %v: %q @ %v expected %T(%v) was %T(%v)`, ci, tcase.json, i, etk, etk, tk, tk)
|
||
break
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
// Test from golang.org/issue/11893
|
||
func TestHTTPDecoding(t *testing.T) {
|
||
const raw = `{ "foo": "bar" }`
|
||
|
||
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
||
w.Write([]byte(raw))
|
||
}))
|
||
defer ts.Close()
|
||
res, err := http.Get(ts.URL)
|
||
if err != nil {
|
||
log.Fatalf("GET failed: %v", err)
|
||
}
|
||
defer res.Body.Close()
|
||
|
||
foo := struct {
|
||
Foo string
|
||
}{}
|
||
|
||
d := NewDecoder(res.Body)
|
||
err = d.Decode(&foo)
|
||
if err != nil {
|
||
t.Fatalf("Decode: %v", err)
|
||
}
|
||
if foo.Foo != "bar" {
|
||
t.Errorf("decoded %q; want \"bar\"", foo.Foo)
|
||
}
|
||
|
||
// make sure we get the EOF the second time
|
||
err = d.Decode(&foo)
|
||
if err != io.EOF {
|
||
t.Errorf("err = %v; want io.EOF", err)
|
||
}
|
||
}
|