21
0
Fork 0
goext/gojson/stream_test.go

475 lines
11 KiB
Go
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

// 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{"": "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","":"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",
>."": "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)
}
}