go-json/decode_test.go

4060 lines
104 KiB
Go

package json_test
import (
"bytes"
"context"
"encoding"
stdjson "encoding/json"
"errors"
"fmt"
"image"
"math"
"math/big"
"net"
"reflect"
"strconv"
"strings"
"testing"
"time"
"unsafe"
"git.gammaspectra.live/P2Pool/go-json"
)
func Test_Decoder(t *testing.T) {
t.Run("int", func(t *testing.T) {
var v int
assertErr(t, json.Unmarshal([]byte(`-1`), &v))
assertEq(t, "int", int(-1), v)
})
t.Run("int8", func(t *testing.T) {
var v int8
assertErr(t, json.Unmarshal([]byte(`-2`), &v))
assertEq(t, "int8", int8(-2), v)
})
t.Run("int16", func(t *testing.T) {
var v int16
assertErr(t, json.Unmarshal([]byte(`-3`), &v))
assertEq(t, "int16", int16(-3), v)
})
t.Run("int32", func(t *testing.T) {
var v int32
assertErr(t, json.Unmarshal([]byte(`-4`), &v))
assertEq(t, "int32", int32(-4), v)
})
t.Run("int64", func(t *testing.T) {
var v int64
assertErr(t, json.Unmarshal([]byte(`-5`), &v))
assertEq(t, "int64", int64(-5), v)
})
t.Run("uint", func(t *testing.T) {
var v uint
assertErr(t, json.Unmarshal([]byte(`1`), &v))
assertEq(t, "uint", uint(1), v)
})
t.Run("uint8", func(t *testing.T) {
var v uint8
assertErr(t, json.Unmarshal([]byte(`2`), &v))
assertEq(t, "uint8", uint8(2), v)
})
t.Run("uint16", func(t *testing.T) {
var v uint16
assertErr(t, json.Unmarshal([]byte(`3`), &v))
assertEq(t, "uint16", uint16(3), v)
})
t.Run("uint32", func(t *testing.T) {
var v uint32
assertErr(t, json.Unmarshal([]byte(`4`), &v))
assertEq(t, "uint32", uint32(4), v)
})
t.Run("uint64", func(t *testing.T) {
var v uint64
assertErr(t, json.Unmarshal([]byte(`5`), &v))
assertEq(t, "uint64", uint64(5), v)
})
t.Run("bool", func(t *testing.T) {
t.Run("true", func(t *testing.T) {
var v bool
assertErr(t, json.Unmarshal([]byte(`true`), &v))
assertEq(t, "bool", true, v)
})
t.Run("false", func(t *testing.T) {
v := true
assertErr(t, json.Unmarshal([]byte(`false`), &v))
assertEq(t, "bool", false, v)
})
})
t.Run("string", func(t *testing.T) {
var v string
assertErr(t, json.Unmarshal([]byte(`"hello"`), &v))
assertEq(t, "string", "hello", v)
})
t.Run("float32", func(t *testing.T) {
var v float32
assertErr(t, json.Unmarshal([]byte(`3.14`), &v))
assertEq(t, "float32", float32(3.14), v)
})
t.Run("float64", func(t *testing.T) {
var v float64
assertErr(t, json.Unmarshal([]byte(`3.14`), &v))
assertEq(t, "float64", float64(3.14), v)
})
t.Run("slice", func(t *testing.T) {
var v []int
assertErr(t, json.Unmarshal([]byte(` [ 1 , 2 , 3 , 4 ] `), &v))
assertEq(t, "slice", fmt.Sprint([]int{1, 2, 3, 4}), fmt.Sprint(v))
})
t.Run("slice_reuse_data", func(t *testing.T) {
v := make([]int, 0, 10)
assertErr(t, json.Unmarshal([]byte(` [ 1 , 2 , 3 , 4 ] `), &v))
assertEq(t, "slice", fmt.Sprint([]int{1, 2, 3, 4}), fmt.Sprint(v))
assertEq(t, "cap", 10, cap(v))
})
t.Run("array", func(t *testing.T) {
var v [4]int
assertErr(t, json.Unmarshal([]byte(` [ 1 , 2 , 3 , 4 ] `), &v))
assertEq(t, "array", fmt.Sprint([4]int{1, 2, 3, 4}), fmt.Sprint(v))
})
t.Run("map", func(t *testing.T) {
var v map[string]int
assertErr(t, json.Unmarshal([]byte(` { "a": 1, "b": 2, "c": 3, "d": 4 } `), &v))
assertEq(t, "map.a", v["a"], 1)
assertEq(t, "map.b", v["b"], 2)
assertEq(t, "map.c", v["c"], 3)
assertEq(t, "map.d", v["d"], 4)
t.Run("nested map", func(t *testing.T) {
// https://git.gammaspectra.live/P2Pool/go-json/issues/8
content := `
{
"a": {
"nestedA": "value of nested a"
},
"b": {
"nestedB": "value of nested b"
},
"c": {
"nestedC": "value of nested c"
}
}`
var v map[string]interface{}
assertErr(t, json.Unmarshal([]byte(content), &v))
assertEq(t, "length", 3, len(v))
})
})
t.Run("struct", func(t *testing.T) {
type T struct {
AA int `json:"aa"`
BB string `json:"bb"`
CC bool `json:"cc"`
}
var v struct {
A int `json:"abcd"`
B string `json:"str"`
C bool
D *T
E func()
}
content := []byte(`
{
"abcd": 123,
"str" : "hello",
"c" : true,
"d" : {
"aa": 2,
"bb": "world",
"cc": true
},
"e" : null
}`)
assertErr(t, json.Unmarshal(content, &v))
assertEq(t, "struct.A", 123, v.A)
assertEq(t, "struct.B", "hello", v.B)
assertEq(t, "struct.C", true, v.C)
assertEq(t, "struct.D.AA", 2, v.D.AA)
assertEq(t, "struct.D.BB", "world", v.D.BB)
assertEq(t, "struct.D.CC", true, v.D.CC)
assertEq(t, "struct.E", true, v.E == nil)
t.Run("struct.field null", func(t *testing.T) {
var v struct {
A string
B []string
C []int
D map[string]interface{}
E [2]string
F interface{}
G func()
}
assertErr(t, json.Unmarshal([]byte(`{"a":null,"b":null,"c":null,"d":null,"e":null,"f":null,"g":null}`), &v))
assertEq(t, "string", v.A, "")
assertNeq(t, "[]string", v.B, nil)
assertEq(t, "[]string", len(v.B), 0)
assertNeq(t, "[]int", v.C, nil)
assertEq(t, "[]int", len(v.C), 0)
assertNeq(t, "map", v.D, nil)
assertEq(t, "map", len(v.D), 0)
assertNeq(t, "array", v.E, nil)
assertEq(t, "array", len(v.E), 2)
assertEq(t, "interface{}", v.F, nil)
assertEq(t, "nilfunc", true, v.G == nil)
})
t.Run("struct.pointer must be nil", func(t *testing.T) {
var v struct {
A *int
}
json.Unmarshal([]byte(`{"a": "alpha"}`), &v)
assertEq(t, "struct.A", v.A, (*int)(nil))
})
})
t.Run("interface", func(t *testing.T) {
t.Run("number", func(t *testing.T) {
var v interface{}
assertErr(t, json.Unmarshal([]byte(`10`), &v))
assertEq(t, "interface.kind", "float64", reflect.TypeOf(v).Kind().String())
assertEq(t, "interface", `10`, fmt.Sprint(v))
})
t.Run("string", func(t *testing.T) {
var v interface{}
assertErr(t, json.Unmarshal([]byte(`"hello"`), &v))
assertEq(t, "interface.kind", "string", reflect.TypeOf(v).Kind().String())
assertEq(t, "interface", `hello`, fmt.Sprint(v))
})
t.Run("escaped string", func(t *testing.T) {
var v interface{}
assertErr(t, json.Unmarshal([]byte(`"he\"llo"`), &v))
assertEq(t, "interface.kind", "string", reflect.TypeOf(v).Kind().String())
assertEq(t, "interface", `he"llo`, fmt.Sprint(v))
})
t.Run("bool", func(t *testing.T) {
var v interface{}
assertErr(t, json.Unmarshal([]byte(`true`), &v))
assertEq(t, "interface.kind", "bool", reflect.TypeOf(v).Kind().String())
assertEq(t, "interface", `true`, fmt.Sprint(v))
})
t.Run("slice", func(t *testing.T) {
var v interface{}
assertErr(t, json.Unmarshal([]byte(`[1,2,3,4]`), &v))
assertEq(t, "interface.kind", "slice", reflect.TypeOf(v).Kind().String())
assertEq(t, "interface", `[1 2 3 4]`, fmt.Sprint(v))
})
t.Run("map", func(t *testing.T) {
var v interface{}
assertErr(t, json.Unmarshal([]byte(`{"a": 1, "b": "c"}`), &v))
assertEq(t, "interface.kind", "map", reflect.TypeOf(v).Kind().String())
m := v.(map[string]interface{})
assertEq(t, "interface", `1`, fmt.Sprint(m["a"]))
assertEq(t, "interface", `c`, fmt.Sprint(m["b"]))
})
t.Run("null", func(t *testing.T) {
var v interface{}
v = 1
assertErr(t, json.Unmarshal([]byte(`null`), &v))
assertEq(t, "interface", nil, v)
})
})
t.Run("func", func(t *testing.T) {
var v func()
assertErr(t, json.Unmarshal([]byte(`null`), &v))
assertEq(t, "nilfunc", true, v == nil)
})
}
func TestIssue98(t *testing.T) {
data := "[\"\\"
var v interface{}
if err := json.Unmarshal([]byte(data), &v); err == nil {
t.Fatal("expected error")
}
}
func Test_Decoder_UseNumber(t *testing.T) {
dec := json.NewDecoder(strings.NewReader(`{"a": 3.14}`))
dec.UseNumber()
var v map[string]interface{}
assertErr(t, dec.Decode(&v))
assertEq(t, "json.Number", "json.Number", fmt.Sprintf("%T", v["a"]))
}
func Test_Decoder_DisallowUnknownFields(t *testing.T) {
dec := json.NewDecoder(strings.NewReader(`{"x": 1}`))
dec.DisallowUnknownFields()
var v struct {
x int
}
err := dec.Decode(&v)
if err == nil {
t.Fatal("expected unknown field error")
}
if err.Error() != `json: unknown field "x"` {
t.Fatal("expected unknown field error")
}
}
func Test_Decoder_EmptyObjectWithSpace(t *testing.T) {
dec := json.NewDecoder(strings.NewReader(`{"obj":{ }}`))
var v struct {
Obj map[string]int `json:"obj"`
}
assertErr(t, dec.Decode(&v))
}
type unmarshalJSON struct {
v int
}
func (u *unmarshalJSON) UnmarshalJSON(b []byte) error {
var v int
if err := json.Unmarshal(b, &v); err != nil {
return err
}
u.v = v
return nil
}
func Test_UnmarshalJSON(t *testing.T) {
t.Run("*struct", func(t *testing.T) {
var v unmarshalJSON
assertErr(t, json.Unmarshal([]byte(`10`), &v))
assertEq(t, "unmarshal", 10, v.v)
})
}
type unmarshalText struct {
v int
}
func (u *unmarshalText) UnmarshalText(b []byte) error {
var v int
if err := json.Unmarshal(b, &v); err != nil {
return err
}
u.v = v
return nil
}
func Test_UnmarshalText(t *testing.T) {
t.Run("*struct", func(t *testing.T) {
var v unmarshalText
assertErr(t, json.Unmarshal([]byte(`"11"`), &v))
assertEq(t, "unmarshal", v.v, 11)
})
}
func Test_InvalidUnmarshalError(t *testing.T) {
t.Run("nil", func(t *testing.T) {
var v *struct{}
err := fmt.Sprint(json.Unmarshal([]byte(`{}`), v))
assertEq(t, "invalid unmarshal error", "json: Unmarshal(nil *struct {})", err)
})
t.Run("non pointer", func(t *testing.T) {
var v int
err := fmt.Sprint(json.Unmarshal([]byte(`{}`), v))
assertEq(t, "invalid unmarshal error", "json: Unmarshal(non-pointer int)", err)
})
}
func Test_Token(t *testing.T) {
dec := json.NewDecoder(strings.NewReader(`{"a": 1, "b": true, "c": [1, "two", null]}`))
cnt := 0
for {
if _, err := dec.Token(); err != nil {
break
}
cnt++
}
if cnt != 12 {
t.Fatal("failed to parse token")
}
}
func Test_DecodeStream(t *testing.T) {
const stream = `
[
{"Name": "Ed", "Text": "Knock knock."},
{"Name": "Sam", "Text": "Who's there?"},
{"Name": "Ed", "Text": "Go fmt."},
{"Name": "Sam", "Text": "Go fmt who?"},
{"Name": "Ed", "Text": "Go fmt yourself!"}
]
`
type Message struct {
Name, Text string
}
dec := json.NewDecoder(strings.NewReader(stream))
tk, err := dec.Token()
assertErr(t, err)
assertEq(t, "[", fmt.Sprint(tk), "[")
elem := 0
// while the array contains values
for dec.More() {
var m Message
// decode an array value (Message)
assertErr(t, dec.Decode(&m))
if m.Name == "" || m.Text == "" {
t.Fatal("failed to assign value to struct field")
}
elem++
}
assertEq(t, "decode count", elem, 5)
tk, err = dec.Token()
assertErr(t, err)
assertEq(t, "]", fmt.Sprint(tk), "]")
}
type T struct {
X string
Y int
Z int `json:"-"`
}
type U struct {
Alphabet string `json:"alpha"`
}
type V struct {
F1 interface{}
F2 int32
F3 json.Number
F4 *VOuter
}
type VOuter struct {
V V
}
type W struct {
S SS
}
type P struct {
PP PP
}
type PP struct {
T T
Ts []T
}
type SS string
func (*SS) UnmarshalJSON(data []byte) error {
return &json.UnmarshalTypeError{Value: "number", Type: reflect.TypeOf(SS(""))}
}
// ifaceNumAsFloat64/ifaceNumAsNumber are used to test unmarshaling with and
// without UseNumber
var ifaceNumAsFloat64 = map[string]interface{}{
"k1": float64(1),
"k2": "s",
"k3": []interface{}{float64(1), float64(2.0), float64(3e-3)},
"k4": map[string]interface{}{"kk1": "s", "kk2": float64(2)},
}
var ifaceNumAsNumber = map[string]interface{}{
"k1": json.Number("1"),
"k2": "s",
"k3": []interface{}{json.Number("1"), json.Number("2.0"), json.Number("3e-3")},
"k4": map[string]interface{}{"kk1": "s", "kk2": json.Number("2")},
}
type tx struct {
x int
}
type u8 uint8
// A type that can unmarshal itself.
type unmarshaler struct {
T bool
}
func (u *unmarshaler) UnmarshalJSON(b []byte) error {
*u = unmarshaler{true} // All we need to see that UnmarshalJSON is called.
return nil
}
type ustruct struct {
M unmarshaler
}
var _ encoding.TextUnmarshaler = (*unmarshalerText)(nil)
type ustructText struct {
M unmarshalerText
}
// u8marshal is an integer type that can marshal/unmarshal itself.
type u8marshal uint8
func (u8 u8marshal) MarshalText() ([]byte, error) {
return []byte(fmt.Sprintf("u%d", u8)), nil
}
var errMissingU8Prefix = errors.New("missing 'u' prefix")
func (u8 *u8marshal) UnmarshalText(b []byte) error {
if !bytes.HasPrefix(b, []byte{'u'}) {
return errMissingU8Prefix
}
n, err := strconv.Atoi(string(b[1:]))
if err != nil {
return err
}
*u8 = u8marshal(n)
return nil
}
var _ encoding.TextUnmarshaler = (*u8marshal)(nil)
var (
umtrue = unmarshaler{true}
umslice = []unmarshaler{{true}}
umstruct = ustruct{unmarshaler{true}}
umtrueXY = unmarshalerText{"x", "y"}
umsliceXY = []unmarshalerText{{"x", "y"}}
umstructXY = ustructText{unmarshalerText{"x", "y"}}
ummapXY = map[unmarshalerText]bool{{"x", "y"}: true}
)
// Test data structures for anonymous fields.
type Point struct {
Z int
}
type Top struct {
Level0 int
Embed0
*Embed0a
*Embed0b `json:"e,omitempty"` // treated as named
Embed0c `json:"-"` // ignored
Loop
Embed0p // has Point with X, Y, used
Embed0q // has Point with Z, used
embed // contains exported field
}
type Embed0 struct {
Level1a int // overridden by Embed0a's Level1a with json tag
Level1b int // used because Embed0a's Level1b is renamed
Level1c int // used because Embed0a's Level1c is ignored
Level1d int // annihilated by Embed0a's Level1d
Level1e int `json:"x"` // annihilated by Embed0a.Level1e
}
type Embed0a struct {
Level1a int `json:"Level1a,omitempty"`
Level1b int `json:"LEVEL1B,omitempty"`
Level1c int `json:"-"`
Level1d int // annihilated by Embed0's Level1d
Level1f int `json:"x"` // annihilated by Embed0's Level1e
}
type Embed0b Embed0
type Embed0c Embed0
type Embed0p struct {
image.Point
}
type Embed0q struct {
Point
}
type embed struct {
Q int
}
type Loop struct {
Loop1 int `json:",omitempty"`
Loop2 int `json:",omitempty"`
*Loop
}
// From reflect test:
// The X in S6 and S7 annihilate, but they also block the X in S8.S9.
type S5 struct {
S6
S7
S8
}
type S6 struct {
X int
}
type S7 S6
type S8 struct {
S9
}
type S9 struct {
X int
Y int
}
// From reflect test:
// The X in S11.S6 and S12.S6 annihilate, but they also block the X in S13.S8.S9.
type S10 struct {
S11
S12
S13
}
type S11 struct {
S6
}
type S12 struct {
S6
}
type S13 struct {
S8
}
type Ambig struct {
// Given "hello", the first match should win.
First int `json:"HELLO"`
Second int `json:"Hello"`
}
type XYZ struct {
X interface{}
Y interface{}
Z interface{}
}
type unexportedWithMethods struct{}
func (unexportedWithMethods) F() {}
type byteWithMarshalJSON byte
func (b byteWithMarshalJSON) MarshalJSON() ([]byte, error) {
return []byte(fmt.Sprintf(`"Z%.2x"`, byte(b))), nil
}
func (b *byteWithMarshalJSON) UnmarshalJSON(data []byte) error {
if len(data) != 5 || data[0] != '"' || data[1] != 'Z' || data[4] != '"' {
return fmt.Errorf("bad quoted string")
}
i, err := strconv.ParseInt(string(data[2:4]), 16, 8)
if err != nil {
return fmt.Errorf("bad hex")
}
*b = byteWithMarshalJSON(i)
return nil
}
type byteWithPtrMarshalJSON byte
func (b *byteWithPtrMarshalJSON) MarshalJSON() ([]byte, error) {
return byteWithMarshalJSON(*b).MarshalJSON()
}
func (b *byteWithPtrMarshalJSON) UnmarshalJSON(data []byte) error {
return (*byteWithMarshalJSON)(b).UnmarshalJSON(data)
}
type byteWithMarshalText byte
func (b byteWithMarshalText) MarshalText() ([]byte, error) {
return []byte(fmt.Sprintf(`Z%.2x`, byte(b))), nil
}
func (b *byteWithMarshalText) UnmarshalText(data []byte) error {
if len(data) != 3 || data[0] != 'Z' {
return fmt.Errorf("bad quoted string")
}
i, err := strconv.ParseInt(string(data[1:3]), 16, 8)
if err != nil {
return fmt.Errorf("bad hex")
}
*b = byteWithMarshalText(i)
return nil
}
type byteWithPtrMarshalText byte
func (b *byteWithPtrMarshalText) MarshalText() ([]byte, error) {
return byteWithMarshalText(*b).MarshalText()
}
func (b *byteWithPtrMarshalText) UnmarshalText(data []byte) error {
return (*byteWithMarshalText)(b).UnmarshalText(data)
}
type intWithMarshalJSON int
func (b intWithMarshalJSON) MarshalJSON() ([]byte, error) {
return []byte(fmt.Sprintf(`"Z%.2x"`, int(b))), nil
}
func (b *intWithMarshalJSON) UnmarshalJSON(data []byte) error {
if len(data) != 5 || data[0] != '"' || data[1] != 'Z' || data[4] != '"' {
return fmt.Errorf("bad quoted string")
}
i, err := strconv.ParseInt(string(data[2:4]), 16, 8)
if err != nil {
return fmt.Errorf("bad hex")
}
*b = intWithMarshalJSON(i)
return nil
}
type intWithPtrMarshalJSON int
func (b *intWithPtrMarshalJSON) MarshalJSON() ([]byte, error) {
return intWithMarshalJSON(*b).MarshalJSON()
}
func (b *intWithPtrMarshalJSON) UnmarshalJSON(data []byte) error {
return (*intWithMarshalJSON)(b).UnmarshalJSON(data)
}
type intWithMarshalText int
func (b intWithMarshalText) MarshalText() ([]byte, error) {
return []byte(fmt.Sprintf(`Z%.2x`, int(b))), nil
}
func (b *intWithMarshalText) UnmarshalText(data []byte) error {
if len(data) != 3 || data[0] != 'Z' {
return fmt.Errorf("bad quoted string")
}
i, err := strconv.ParseInt(string(data[1:3]), 16, 8)
if err != nil {
return fmt.Errorf("bad hex")
}
*b = intWithMarshalText(i)
return nil
}
type intWithPtrMarshalText int
func (b *intWithPtrMarshalText) MarshalText() ([]byte, error) {
return intWithMarshalText(*b).MarshalText()
}
func (b *intWithPtrMarshalText) UnmarshalText(data []byte) error {
return (*intWithMarshalText)(b).UnmarshalText(data)
}
type mapStringToStringData struct {
Data map[string]string `json:"data"`
}
type unmarshalTest struct {
in string
ptr interface{} // new(type)
out interface{}
err error
useNumber bool
golden bool
disallowUnknownFields bool
}
type B struct {
B bool `json:",string"`
}
type DoublePtr struct {
I **int
J **int
}
var unmarshalTests = []unmarshalTest{
// basic types
{in: `true`, ptr: new(bool), out: true}, // 0
{in: `1`, ptr: new(int), out: 1}, // 1
{in: `1.2`, ptr: new(float64), out: 1.2}, // 2
{in: `-5`, ptr: new(int16), out: int16(-5)}, // 3
{in: `2`, ptr: new(json.Number), out: json.Number("2"), useNumber: true}, // 4
{in: `2`, ptr: new(json.Number), out: json.Number("2")}, // 5
{in: `2`, ptr: new(interface{}), out: float64(2.0)}, // 6
{in: `2`, ptr: new(interface{}), out: json.Number("2"), useNumber: true}, // 7
{in: `"a\u1234"`, ptr: new(string), out: "a\u1234"}, // 8
{in: `"http:\/\/"`, ptr: new(string), out: "http://"}, // 9
{in: `"g-clef: \uD834\uDD1E"`, ptr: new(string), out: "g-clef: \U0001D11E"}, // 10
{in: `"invalid: \uD834x\uDD1E"`, ptr: new(string), out: "invalid: \uFFFDx\uFFFD"}, // 11
{in: "null", ptr: new(interface{}), out: nil}, // 12
{in: `{"X": [1,2,3], "Y": 4}`, ptr: new(T), out: T{Y: 4}, err: &json.UnmarshalTypeError{"array", reflect.TypeOf(""), 7, "T", "X"}}, // 13
{in: `{"X": 23}`, ptr: new(T), out: T{}, err: &json.UnmarshalTypeError{"number", reflect.TypeOf(""), 8, "T", "X"}}, {in: `{"x": 1}`, ptr: new(tx), out: tx{}}, // 14
{in: `{"x": 1}`, ptr: new(tx), out: tx{}}, // 15, 16
{in: `{"x": 1}`, ptr: new(tx), err: fmt.Errorf("json: unknown field \"x\""), disallowUnknownFields: true}, // 17
{in: `{"S": 23}`, ptr: new(W), out: W{}, err: &json.UnmarshalTypeError{"number", reflect.TypeOf(SS("")), 0, "W", "S"}}, // 18
{in: `{"F1":1,"F2":2,"F3":3}`, ptr: new(V), out: V{F1: float64(1), F2: int32(2), F3: json.Number("3")}}, // 19
{in: `{"F1":1,"F2":2,"F3":3}`, ptr: new(V), out: V{F1: json.Number("1"), F2: int32(2), F3: json.Number("3")}, useNumber: true}, // 20
{in: `{"k1":1,"k2":"s","k3":[1,2.0,3e-3],"k4":{"kk1":"s","kk2":2}}`, ptr: new(interface{}), out: ifaceNumAsFloat64}, // 21
{in: `{"k1":1,"k2":"s","k3":[1,2.0,3e-3],"k4":{"kk1":"s","kk2":2}}`, ptr: new(interface{}), out: ifaceNumAsNumber, useNumber: true}, // 22
// raw values with whitespace
{in: "\n true ", ptr: new(bool), out: true}, // 23
{in: "\t 1 ", ptr: new(int), out: 1}, // 24
{in: "\r 1.2 ", ptr: new(float64), out: 1.2}, // 25
{in: "\t -5 \n", ptr: new(int16), out: int16(-5)}, // 26
{in: "\t \"a\\u1234\" \n", ptr: new(string), out: "a\u1234"}, // 27
// Z has a "-" tag.
{in: `{"Y": 1, "Z": 2}`, ptr: new(T), out: T{Y: 1}}, // 28
{in: `{"Y": 1, "Z": 2}`, ptr: new(T), err: fmt.Errorf("json: unknown field \"Z\""), disallowUnknownFields: true}, // 29
{in: `{"alpha": "abc", "alphabet": "xyz"}`, ptr: new(U), out: U{Alphabet: "abc"}}, // 30
{in: `{"alpha": "abc", "alphabet": "xyz"}`, ptr: new(U), err: fmt.Errorf("json: unknown field \"alphabet\""), disallowUnknownFields: true}, // 31
{in: `{"alpha": "abc"}`, ptr: new(U), out: U{Alphabet: "abc"}}, // 32
{in: `{"alphabet": "xyz"}`, ptr: new(U), out: U{}}, // 33
{in: `{"alphabet": "xyz"}`, ptr: new(U), err: fmt.Errorf("json: unknown field \"alphabet\""), disallowUnknownFields: true}, // 34
// syntax errors
{in: `{"X": "foo", "Y"}`, err: json.NewSyntaxError("invalid character '}' after object key", 17)}, // 35
{in: `[1, 2, 3+]`, err: json.NewSyntaxError("invalid character '+' after array element", 9)}, // 36
{in: `{"X":12x}`, err: json.NewSyntaxError("invalid character 'x' after object key:value pair", 8), useNumber: true}, // 37
{in: `[2, 3`, err: json.NewSyntaxError("unexpected end of JSON input", 5)}, // 38
{in: `{"F3": -}`, ptr: new(V), out: V{F3: json.Number("-")}, err: json.NewSyntaxError("strconv.ParseFloat: parsing \"-\": invalid syntax", 9)}, // 39
// raw value errors
{in: "\x01 42", err: json.NewSyntaxError("invalid character '\\x01' looking for beginning of value", 1)}, // 40
{in: " 42 \x01", err: json.NewSyntaxError("invalid character '\\x01' after top-level value", 5)}, // 41
{in: "\x01 true", err: json.NewSyntaxError("invalid character '\\x01' looking for beginning of value", 1)}, // 42
{in: " false \x01", err: json.NewSyntaxError("invalid character '\\x01' after top-level value", 8)}, // 43
{in: "\x01 1.2", err: json.NewSyntaxError("invalid character '\\x01' looking for beginning of value", 1)}, // 44
{in: " 3.4 \x01", err: json.NewSyntaxError("invalid character '\\x01' after top-level value", 6)}, // 45
{in: "\x01 \"string\"", err: json.NewSyntaxError("invalid character '\\x01' looking for beginning of value", 1)}, // 46
{in: " \"string\" \x01", err: json.NewSyntaxError("invalid character '\\x01' after top-level value", 11)}, // 47
// array tests
{in: `[1, 2, 3]`, ptr: new([3]int), out: [3]int{1, 2, 3}}, // 48
{in: `[1, 2, 3]`, ptr: new([1]int), out: [1]int{1}}, // 49
{in: `[1, 2, 3]`, ptr: new([5]int), out: [5]int{1, 2, 3, 0, 0}}, // 50
{in: `[1, 2, 3]`, ptr: new(MustNotUnmarshalJSON), err: errors.New("MustNotUnmarshalJSON was used")}, // 51
// empty array to interface test
{in: `[]`, ptr: new([]interface{}), out: []interface{}{}}, //52
{in: `null`, ptr: new([]interface{}), out: []interface{}(nil)}, //53
{in: `{"T":[]}`, ptr: new(map[string]interface{}), out: map[string]interface{}{"T": []interface{}{}}}, //54
{in: `{"T":null}`, ptr: new(map[string]interface{}), out: map[string]interface{}{"T": interface{}(nil)}}, // 55
// composite tests
{in: allValueIndent, ptr: new(All), out: allValue}, // 56
{in: allValueCompact, ptr: new(All), out: allValue}, // 57
{in: allValueIndent, ptr: new(*All), out: &allValue}, // 58
{in: allValueCompact, ptr: new(*All), out: &allValue}, // 59
{in: pallValueIndent, ptr: new(All), out: pallValue}, // 60
{in: pallValueCompact, ptr: new(All), out: pallValue}, // 61
{in: pallValueIndent, ptr: new(*All), out: &pallValue}, // 62
{in: pallValueCompact, ptr: new(*All), out: &pallValue}, // 63
// unmarshal interface test
{in: `{"T":false}`, ptr: new(unmarshaler), out: umtrue}, // use "false" so test will fail if custom unmarshaler is not called
{in: `{"T":false}`, ptr: new(*unmarshaler), out: &umtrue}, // 65
{in: `[{"T":false}]`, ptr: new([]unmarshaler), out: umslice}, // 66
{in: `[{"T":false}]`, ptr: new(*[]unmarshaler), out: &umslice}, // 67
{in: `{"M":{"T":"x:y"}}`, ptr: new(ustruct), out: umstruct}, // 68
// UnmarshalText interface test
{in: `"x:y"`, ptr: new(unmarshalerText), out: umtrueXY}, // 69
{in: `"x:y"`, ptr: new(*unmarshalerText), out: &umtrueXY}, // 70
{in: `["x:y"]`, ptr: new([]unmarshalerText), out: umsliceXY}, // 71
{in: `["x:y"]`, ptr: new(*[]unmarshalerText), out: &umsliceXY}, // 72
{in: `{"M":"x:y"}`, ptr: new(ustructText), out: umstructXY}, // 73
// integer-keyed map test
{
in: `{"-1":"a","0":"b","1":"c"}`, // 74
ptr: new(map[int]string),
out: map[int]string{-1: "a", 0: "b", 1: "c"},
},
{
in: `{"0":"a","10":"c","9":"b"}`, // 75
ptr: new(map[u8]string),
out: map[u8]string{0: "a", 9: "b", 10: "c"},
},
{
in: `{"-9223372036854775808":"min","9223372036854775807":"max"}`, // 76
ptr: new(map[int64]string),
out: map[int64]string{math.MinInt64: "min", math.MaxInt64: "max"},
},
{
in: `{"18446744073709551615":"max"}`, // 77
ptr: new(map[uint64]string),
out: map[uint64]string{math.MaxUint64: "max"},
},
{
in: `{"0":false,"10":true}`, // 78
ptr: new(map[uintptr]bool),
out: map[uintptr]bool{0: false, 10: true},
},
// Check that MarshalText and UnmarshalText take precedence
// over default integer handling in map keys.
{
in: `{"u2":4}`, // 79
ptr: new(map[u8marshal]int),
out: map[u8marshal]int{2: 4},
},
{
in: `{"2":4}`, // 80
ptr: new(map[u8marshal]int),
err: errMissingU8Prefix,
},
// integer-keyed map errors
{
in: `{"abc":"abc"}`, // 81
ptr: new(map[int]string),
err: &json.UnmarshalTypeError{Value: "number a", Type: reflect.TypeOf(0), Offset: 2},
},
{
in: `{"256":"abc"}`, // 82
ptr: new(map[uint8]string),
err: &json.UnmarshalTypeError{Value: "number 256", Type: reflect.TypeOf(uint8(0)), Offset: 2},
},
{
in: `{"128":"abc"}`, // 83
ptr: new(map[int8]string),
err: &json.UnmarshalTypeError{Value: "number 128", Type: reflect.TypeOf(int8(0)), Offset: 2},
},
{
in: `{"-1":"abc"}`, // 84
ptr: new(map[uint8]string),
err: &json.UnmarshalTypeError{Value: "number -", Type: reflect.TypeOf(uint8(0)), Offset: 2},
},
{
in: `{"F":{"a":2,"3":4}}`, // 85
ptr: new(map[string]map[int]int),
err: &json.UnmarshalTypeError{Value: "number a", Type: reflect.TypeOf(int(0)), Offset: 7},
},
{
in: `{"F":{"a":2,"3":4}}`, // 86
ptr: new(map[string]map[uint]int),
err: &json.UnmarshalTypeError{Value: "number a", Type: reflect.TypeOf(uint(0)), Offset: 7},
},
// Map keys can be encoding.TextUnmarshalers.
{in: `{"x:y":true}`, ptr: new(map[unmarshalerText]bool), out: ummapXY}, // 87
// If multiple values for the same key exists, only the most recent value is used.
{in: `{"x:y":false,"x:y":true}`, ptr: new(map[unmarshalerText]bool), out: ummapXY}, // 88
{ // 89
in: `{
"Level0": 1,
"Level1b": 2,
"Level1c": 3,
"x": 4,
"Level1a": 5,
"LEVEL1B": 6,
"e": {
"Level1a": 8,
"Level1b": 9,
"Level1c": 10,
"Level1d": 11,
"x": 12
},
"Loop1": 13,
"Loop2": 14,
"X": 15,
"Y": 16,
"Z": 17,
"Q": 18
}`,
ptr: new(Top),
out: Top{
Level0: 1,
Embed0: Embed0{
Level1b: 2,
Level1c: 3,
},
Embed0a: &Embed0a{
Level1a: 5,
Level1b: 6,
},
Embed0b: &Embed0b{
Level1a: 8,
Level1b: 9,
Level1c: 10,
Level1d: 11,
Level1e: 12,
},
Loop: Loop{
Loop1: 13,
Loop2: 14,
},
Embed0p: Embed0p{
Point: image.Point{X: 15, Y: 16},
},
Embed0q: Embed0q{
Point: Point{Z: 17},
},
embed: embed{
Q: 18,
},
},
},
{
in: `{"hello": 1}`, // 90
ptr: new(Ambig),
out: Ambig{First: 1},
},
{
in: `{"X": 1,"Y":2}`, // 91
ptr: new(S5),
out: S5{S8: S8{S9: S9{Y: 2}}},
},
{
in: `{"X": 1,"Y":2}`, // 92
ptr: new(S5),
err: fmt.Errorf("json: unknown field \"X\""),
disallowUnknownFields: true,
},
{
in: `{"X": 1,"Y":2}`, // 93
ptr: new(S10),
out: S10{S13: S13{S8: S8{S9: S9{Y: 2}}}},
},
{
in: `{"X": 1,"Y":2}`, // 94
ptr: new(S10),
err: fmt.Errorf("json: unknown field \"X\""),
disallowUnknownFields: true,
},
{
in: `{"I": 0, "I": null, "J": null}`, // 95
ptr: new(DoublePtr),
out: DoublePtr{I: nil, J: nil},
},
{
in: "\"hello\\ud800world\"", // 96
ptr: new(string),
out: "hello\ufffdworld",
},
{
in: "\"hello\\ud800\\ud800world\"", // 97
ptr: new(string),
out: "hello\ufffd\ufffdworld",
},
{
in: "\"hello\\ud800\\ud800world\"", // 98
ptr: new(string),
out: "hello\ufffd\ufffdworld",
},
// Used to be issue 8305, but time.Time implements encoding.TextUnmarshaler so this works now.
{
in: `{"2009-11-10T23:00:00Z": "hello world"}`, // 99
ptr: new(map[time.Time]string),
out: map[time.Time]string{time.Date(2009, 11, 10, 23, 0, 0, 0, time.UTC): "hello world"},
},
// issue 8305
{
in: `{"2009-11-10T23:00:00Z": "hello world"}`, // 100
ptr: new(map[Point]string),
err: &json.UnmarshalTypeError{Value: "object", Type: reflect.TypeOf(Point{}), Offset: 0},
},
{
in: `{"asdf": "hello world"}`, // 101
ptr: new(map[unmarshaler]string),
err: &json.UnmarshalTypeError{Value: "object", Type: reflect.TypeOf(unmarshaler{}), Offset: 1},
},
// related to issue 13783.
// Go 1.7 changed marshaling a slice of typed byte to use the methods on the byte type,
// similar to marshaling a slice of typed int.
// These tests check that, assuming the byte type also has valid decoding methods,
// either the old base64 string encoding or the new per-element encoding can be
// successfully unmarshaled. The custom unmarshalers were accessible in earlier
// versions of Go, even though the custom marshaler was not.
{
in: `"AQID"`, // 102
ptr: new([]byteWithMarshalJSON),
out: []byteWithMarshalJSON{1, 2, 3},
},
{
in: `["Z01","Z02","Z03"]`, // 103
ptr: new([]byteWithMarshalJSON),
out: []byteWithMarshalJSON{1, 2, 3},
golden: true,
},
{
in: `"AQID"`, // 104
ptr: new([]byteWithMarshalText),
out: []byteWithMarshalText{1, 2, 3},
},
{
in: `["Z01","Z02","Z03"]`, // 105
ptr: new([]byteWithMarshalText),
out: []byteWithMarshalText{1, 2, 3},
golden: true,
},
{
in: `"AQID"`, // 106
ptr: new([]byteWithPtrMarshalJSON),
out: []byteWithPtrMarshalJSON{1, 2, 3},
},
{
in: `["Z01","Z02","Z03"]`, // 107
ptr: new([]byteWithPtrMarshalJSON),
out: []byteWithPtrMarshalJSON{1, 2, 3},
golden: true,
},
{
in: `"AQID"`, // 108
ptr: new([]byteWithPtrMarshalText),
out: []byteWithPtrMarshalText{1, 2, 3},
},
{
in: `["Z01","Z02","Z03"]`, // 109
ptr: new([]byteWithPtrMarshalText),
out: []byteWithPtrMarshalText{1, 2, 3},
golden: true,
},
// ints work with the marshaler but not the base64 []byte case
{
in: `["Z01","Z02","Z03"]`, // 110
ptr: new([]intWithMarshalJSON),
out: []intWithMarshalJSON{1, 2, 3},
golden: true,
},
{
in: `["Z01","Z02","Z03"]`, // 111
ptr: new([]intWithMarshalText),
out: []intWithMarshalText{1, 2, 3},
golden: true,
},
{
in: `["Z01","Z02","Z03"]`, // 112
ptr: new([]intWithPtrMarshalJSON),
out: []intWithPtrMarshalJSON{1, 2, 3},
golden: true,
},
{
in: `["Z01","Z02","Z03"]`, // 113
ptr: new([]intWithPtrMarshalText),
out: []intWithPtrMarshalText{1, 2, 3},
golden: true,
},
{in: `0.000001`, ptr: new(float64), out: 0.000001, golden: true}, // 114
{in: `1e-07`, ptr: new(float64), out: 1e-7, golden: true}, // 115
{in: `100000000000000000000`, ptr: new(float64), out: 100000000000000000000.0, golden: true}, // 116
{in: `1e+21`, ptr: new(float64), out: 1e21, golden: true}, // 117
{in: `-0.000001`, ptr: new(float64), out: -0.000001, golden: true}, // 118
{in: `-1e-07`, ptr: new(float64), out: -1e-7, golden: true}, // 119
{in: `-100000000000000000000`, ptr: new(float64), out: -100000000000000000000.0, golden: true}, // 120
{in: `-1e+21`, ptr: new(float64), out: -1e21, golden: true}, // 121
{in: `999999999999999900000`, ptr: new(float64), out: 999999999999999900000.0, golden: true}, // 122
{in: `9007199254740992`, ptr: new(float64), out: 9007199254740992.0, golden: true}, // 123
{in: `9007199254740993`, ptr: new(float64), out: 9007199254740992.0, golden: false}, // 124
{
in: `{"V": {"F2": "hello"}}`, // 125
ptr: new(VOuter),
err: &json.UnmarshalTypeError{
Value: `number "`,
Struct: "V",
Field: "F2",
Type: reflect.TypeOf(int32(0)),
Offset: 20,
},
},
{
in: `{"V": {"F4": {}, "F2": "hello"}}`, // 126
ptr: new(VOuter),
err: &json.UnmarshalTypeError{
Value: `number "`,
Struct: "V",
Field: "F2",
Type: reflect.TypeOf(int32(0)),
Offset: 30,
},
},
// issue 15146.
// invalid inputs in wrongStringTests below.
{in: `{"B":"true"}`, ptr: new(B), out: B{true}, golden: true}, // 127
{in: `{"B":"false"}`, ptr: new(B), out: B{false}, golden: true}, // 128
{in: `{"B": "maybe"}`, ptr: new(B), err: errors.New(`json: bool unexpected end of JSON input`)}, // 129
{in: `{"B": "tru"}`, ptr: new(B), err: errors.New(`json: invalid character as true`)}, // 130
{in: `{"B": "False"}`, ptr: new(B), err: errors.New(`json: bool unexpected end of JSON input`)}, // 131
{in: `{"B": "null"}`, ptr: new(B), out: B{false}}, // 132
{in: `{"B": "nul"}`, ptr: new(B), err: errors.New(`json: invalid character as null`)}, // 133
{in: `{"B": [2, 3]}`, ptr: new(B), err: errors.New(`json: cannot unmarshal array into Go struct field B.B of type string`)}, // 134
// additional tests for disallowUnknownFields
{ // 135
in: `{
"Level0": 1,
"Level1b": 2,
"Level1c": 3,
"x": 4,
"Level1a": 5,
"LEVEL1B": 6,
"e": {
"Level1a": 8,
"Level1b": 9,
"Level1c": 10,
"Level1d": 11,
"x": 12
},
"Loop1": 13,
"Loop2": 14,
"X": 15,
"Y": 16,
"Z": 17,
"Q": 18,
"extra": true
}`,
ptr: new(Top),
err: fmt.Errorf("json: unknown field \"extra\""),
disallowUnknownFields: true,
},
{ // 136
in: `{
"Level0": 1,
"Level1b": 2,
"Level1c": 3,
"x": 4,
"Level1a": 5,
"LEVEL1B": 6,
"e": {
"Level1a": 8,
"Level1b": 9,
"Level1c": 10,
"Level1d": 11,
"x": 12,
"extra": null
},
"Loop1": 13,
"Loop2": 14,
"X": 15,
"Y": 16,
"Z": 17,
"Q": 18
}`,
ptr: new(Top),
err: fmt.Errorf("json: unknown field \"extra\""),
disallowUnknownFields: true,
},
// issue 26444
// UnmarshalTypeError without field & struct values
{
in: `{"data":{"test1": "bob", "test2": 123}}`, // 137
ptr: new(mapStringToStringData),
err: &json.UnmarshalTypeError{Value: "number", Type: reflect.TypeOf(""), Offset: 37, Struct: "mapStringToStringData", Field: "Data"},
},
{
in: `{"data":{"test1": 123, "test2": "bob"}}`, // 138
ptr: new(mapStringToStringData),
err: &json.UnmarshalTypeError{Value: "number", Type: reflect.TypeOf(""), Offset: 21, Struct: "mapStringToStringData", Field: "Data"},
},
// trying to decode JSON arrays or objects via TextUnmarshaler
{
in: `[1, 2, 3]`, // 139
ptr: new(MustNotUnmarshalText),
err: &json.UnmarshalTypeError{Value: "array", Type: reflect.TypeOf(&MustNotUnmarshalText{}), Offset: 1},
},
{
in: `{"foo": "bar"}`, // 140
ptr: new(MustNotUnmarshalText),
err: &json.UnmarshalTypeError{Value: "object", Type: reflect.TypeOf(&MustNotUnmarshalText{}), Offset: 1},
},
// #22369
{
in: `{"PP": {"T": {"Y": "bad-type"}}}`, // 141
ptr: new(P),
err: &json.UnmarshalTypeError{
Value: `number "`,
Struct: "T",
Field: "Y",
Type: reflect.TypeOf(int(0)),
Offset: 29,
},
},
{
in: `{"Ts": [{"Y": 1}, {"Y": 2}, {"Y": "bad-type"}]}`, // 142
ptr: new(PP),
err: &json.UnmarshalTypeError{
Value: `number "`,
Struct: "T",
Field: "Y",
Type: reflect.TypeOf(int(0)),
Offset: 29,
},
},
// #14702
{
in: `invalid`, // 143
ptr: new(json.Number),
err: json.NewSyntaxError(
`invalid character 'i' looking for beginning of value`,
1,
),
},
{
in: `"invalid"`, // 144
ptr: new(json.Number),
err: fmt.Errorf(`strconv.ParseFloat: parsing "invalid": invalid syntax`),
},
{
in: `{"A":"invalid"}`, // 145
ptr: new(struct{ A json.Number }),
err: fmt.Errorf(`strconv.ParseFloat: parsing "invalid": invalid syntax`),
},
{
in: `{"A":"invalid"}`, // 146
ptr: new(struct {
A json.Number `json:",string"`
}),
err: fmt.Errorf(`json: json.Number unexpected end of JSON input`),
},
{
in: `{"A":"invalid"}`, // 147
ptr: new(map[string]json.Number),
err: fmt.Errorf(`strconv.ParseFloat: parsing "invalid": invalid syntax`),
},
// invalid UTF-8 is coerced to valid UTF-8.
{
in: "\"hello\xffworld\"", // 148
ptr: new(string),
out: "hello\ufffdworld",
},
{
in: "\"hello\xc2\xc2world\"", // 149
ptr: new(string),
out: "hello\ufffd\ufffdworld",
},
{
in: "\"hello\xc2\xffworld\"", // 150
ptr: new(string),
out: "hello\ufffd\ufffdworld",
},
{
in: "\"hello\xed\xa0\x80\xed\xb0\x80world\"", // 151
ptr: new(string),
out: "hello\ufffd\ufffd\ufffd\ufffd\ufffd\ufffdworld",
},
{in: "-128", ptr: new(int8), out: int8(-128)},
{in: "127", ptr: new(int8), out: int8(127)},
{in: "-32768", ptr: new(int16), out: int16(-32768)},
{in: "32767", ptr: new(int16), out: int16(32767)},
{in: "-2147483648", ptr: new(int32), out: int32(-2147483648)},
{in: "2147483647", ptr: new(int32), out: int32(2147483647)},
}
type All struct {
Bool bool
Int int
Int8 int8
Int16 int16
Int32 int32
Int64 int64
Uint uint
Uint8 uint8
Uint16 uint16
Uint32 uint32
Uint64 uint64
Uintptr uintptr
Float32 float32
Float64 float64
Foo string `json:"bar"`
Foo2 string `json:"bar2,dummyopt"`
IntStr int64 `json:",string"`
UintptrStr uintptr `json:",string"`
PBool *bool
PInt *int
PInt8 *int8
PInt16 *int16
PInt32 *int32
PInt64 *int64
PUint *uint
PUint8 *uint8
PUint16 *uint16
PUint32 *uint32
PUint64 *uint64
PUintptr *uintptr
PFloat32 *float32
PFloat64 *float64
String string
PString *string
Map map[string]Small
MapP map[string]*Small
PMap *map[string]Small
PMapP *map[string]*Small
EmptyMap map[string]Small
NilMap map[string]Small
Slice []Small
SliceP []*Small
PSlice *[]Small
PSliceP *[]*Small
EmptySlice []Small
NilSlice []Small
StringSlice []string
ByteSlice []byte
Small Small
PSmall *Small
PPSmall **Small
Interface interface{}
PInterface *interface{}
unexported int
}
type Small struct {
Tag string
}
var allValue = All{
Bool: true,
Int: 2,
Int8: 3,
Int16: 4,
Int32: 5,
Int64: 6,
Uint: 7,
Uint8: 8,
Uint16: 9,
Uint32: 10,
Uint64: 11,
Uintptr: 12,
Float32: 14.1,
Float64: 15.1,
Foo: "foo",
Foo2: "foo2",
IntStr: 42,
UintptrStr: 44,
String: "16",
Map: map[string]Small{
"17": {Tag: "tag17"},
"18": {Tag: "tag18"},
},
MapP: map[string]*Small{
"19": {Tag: "tag19"},
"20": nil,
},
EmptyMap: map[string]Small{},
Slice: []Small{{Tag: "tag20"}, {Tag: "tag21"}},
SliceP: []*Small{{Tag: "tag22"}, nil, {Tag: "tag23"}},
EmptySlice: []Small{},
StringSlice: []string{"str24", "str25", "str26"},
ByteSlice: []byte{27, 28, 29},
Small: Small{Tag: "tag30"},
PSmall: &Small{Tag: "tag31"},
Interface: 5.2,
}
var pallValue = All{
PBool: &allValue.Bool,
PInt: &allValue.Int,
PInt8: &allValue.Int8,
PInt16: &allValue.Int16,
PInt32: &allValue.Int32,
PInt64: &allValue.Int64,
PUint: &allValue.Uint,
PUint8: &allValue.Uint8,
PUint16: &allValue.Uint16,
PUint32: &allValue.Uint32,
PUint64: &allValue.Uint64,
PUintptr: &allValue.Uintptr,
PFloat32: &allValue.Float32,
PFloat64: &allValue.Float64,
PString: &allValue.String,
PMap: &allValue.Map,
PMapP: &allValue.MapP,
PSlice: &allValue.Slice,
PSliceP: &allValue.SliceP,
PPSmall: &allValue.PSmall,
PInterface: &allValue.Interface,
}
var allValueIndent = `{
"Bool": true,
"Int": 2,
"Int8": 3,
"Int16": 4,
"Int32": 5,
"Int64": 6,
"Uint": 7,
"Uint8": 8,
"Uint16": 9,
"Uint32": 10,
"Uint64": 11,
"Uintptr": 12,
"Float32": 14.1,
"Float64": 15.1,
"bar": "foo",
"bar2": "foo2",
"IntStr": "42",
"UintptrStr": "44",
"PBool": null,
"PInt": null,
"PInt8": null,
"PInt16": null,
"PInt32": null,
"PInt64": null,
"PUint": null,
"PUint8": null,
"PUint16": null,
"PUint32": null,
"PUint64": null,
"PUintptr": null,
"PFloat32": null,
"PFloat64": null,
"String": "16",
"PString": null,
"Map": {
"17": {
"Tag": "tag17"
},
"18": {
"Tag": "tag18"
}
},
"MapP": {
"19": {
"Tag": "tag19"
},
"20": null
},
"PMap": null,
"PMapP": null,
"EmptyMap": {},
"NilMap": null,
"Slice": [
{
"Tag": "tag20"
},
{
"Tag": "tag21"
}
],
"SliceP": [
{
"Tag": "tag22"
},
null,
{
"Tag": "tag23"
}
],
"PSlice": null,
"PSliceP": null,
"EmptySlice": [],
"NilSlice": null,
"StringSlice": [
"str24",
"str25",
"str26"
],
"ByteSlice": "Gxwd",
"Small": {
"Tag": "tag30"
},
"PSmall": {
"Tag": "tag31"
},
"PPSmall": null,
"Interface": 5.2,
"PInterface": null
}`
var allValueCompact = strings.Map(noSpace, allValueIndent)
var pallValueIndent = `{
"Bool": false,
"Int": 0,
"Int8": 0,
"Int16": 0,
"Int32": 0,
"Int64": 0,
"Uint": 0,
"Uint8": 0,
"Uint16": 0,
"Uint32": 0,
"Uint64": 0,
"Uintptr": 0,
"Float32": 0,
"Float64": 0,
"bar": "",
"bar2": "",
"IntStr": "0",
"UintptrStr": "0",
"PBool": true,
"PInt": 2,
"PInt8": 3,
"PInt16": 4,
"PInt32": 5,
"PInt64": 6,
"PUint": 7,
"PUint8": 8,
"PUint16": 9,
"PUint32": 10,
"PUint64": 11,
"PUintptr": 12,
"PFloat32": 14.1,
"PFloat64": 15.1,
"String": "",
"PString": "16",
"Map": null,
"MapP": null,
"PMap": {
"17": {
"Tag": "tag17"
},
"18": {
"Tag": "tag18"
}
},
"PMapP": {
"19": {
"Tag": "tag19"
},
"20": null
},
"EmptyMap": null,
"NilMap": null,
"Slice": null,
"SliceP": null,
"PSlice": [
{
"Tag": "tag20"
},
{
"Tag": "tag21"
}
],
"PSliceP": [
{
"Tag": "tag22"
},
null,
{
"Tag": "tag23"
}
],
"EmptySlice": null,
"NilSlice": null,
"StringSlice": null,
"ByteSlice": null,
"Small": {
"Tag": ""
},
"PSmall": null,
"PPSmall": {
"Tag": "tag31"
},
"Interface": null,
"PInterface": 5.2
}`
var pallValueCompact = strings.Map(noSpace, pallValueIndent)
type NullTest struct {
Bool bool
Int int
Int8 int8
Int16 int16
Int32 int32
Int64 int64
Uint uint
Uint8 uint8
Uint16 uint16
Uint32 uint32
Uint64 uint64
Float32 float32
Float64 float64
String string
PBool *bool
Map map[string]string
Slice []string
Interface interface{}
PRaw *json.RawMessage
PTime *time.Time
PBigInt *big.Int
PText *MustNotUnmarshalText
PBuffer *bytes.Buffer // has methods, just not relevant ones
PStruct *struct{}
Raw json.RawMessage
Time time.Time
BigInt big.Int
Text MustNotUnmarshalText
Buffer bytes.Buffer
Struct struct{}
}
type MustNotUnmarshalJSON struct{}
func (x MustNotUnmarshalJSON) UnmarshalJSON(data []byte) error {
return errors.New("MustNotUnmarshalJSON was used")
}
type MustNotUnmarshalText struct{}
func (x MustNotUnmarshalText) UnmarshalText(text []byte) error {
return errors.New("MustNotUnmarshalText was used")
}
func isSpace(c byte) bool {
return c <= ' ' && (c == ' ' || c == '\t' || c == '\r' || c == '\n')
}
func noSpace(c rune) rune {
if isSpace(byte(c)) { //only used for ascii
return -1
}
return c
}
var badUTF8 = []struct {
in, out string
}{
{"hello\xffworld", `"hello\ufffdworld"`},
{"", `""`},
{"\xff", `"\ufffd"`},
{"\xff\xff", `"\ufffd\ufffd"`},
{"a\xffb", `"a\ufffdb"`},
{"\xe6\x97\xa5\xe6\x9c\xac\xff\xaa\x9e", `"日本\ufffd\ufffd\ufffd"`},
}
func TestMarshalAllValue(t *testing.T) {
b, err := json.Marshal(allValue)
if err != nil {
t.Fatalf("Marshal allValue: %v", err)
}
if string(b) != allValueCompact {
t.Errorf("Marshal allValueCompact")
diff(t, b, []byte(allValueCompact))
return
}
b, err = json.Marshal(pallValue)
if err != nil {
t.Fatalf("Marshal pallValue: %v", err)
}
if string(b) != pallValueCompact {
t.Errorf("Marshal pallValueCompact")
diff(t, b, []byte(pallValueCompact))
return
}
}
func TestMarshalBadUTF8(t *testing.T) {
for _, tt := range badUTF8 {
b, err := json.Marshal(tt.in)
if string(b) != tt.out || err != nil {
t.Errorf("Marshal(%q) = %#q, %v, want %#q, nil", tt.in, b, err, tt.out)
}
}
}
func TestMarshalNumberZeroVal(t *testing.T) {
var n json.Number
out, err := json.Marshal(n)
if err != nil {
t.Fatal(err)
}
outStr := string(out)
if outStr != "0" {
t.Fatalf("Invalid zero val for Number: %q", outStr)
}
}
func TestMarshalEmbeds(t *testing.T) {
top := &Top{
Level0: 1,
Embed0: Embed0{
Level1b: 2,
Level1c: 3,
},
Embed0a: &Embed0a{
Level1a: 5,
Level1b: 6,
},
Embed0b: &Embed0b{
Level1a: 8,
Level1b: 9,
Level1c: 10,
Level1d: 11,
Level1e: 12,
},
Loop: Loop{
Loop1: 13,
Loop2: 14,
},
Embed0p: Embed0p{
Point: image.Point{X: 15, Y: 16},
},
Embed0q: Embed0q{
Point: Point{Z: 17},
},
embed: embed{
Q: 18,
},
}
b, err := json.Marshal(top)
if err != nil {
t.Fatal(err)
}
want := "{\"Level0\":1,\"Level1b\":2,\"Level1c\":3,\"Level1a\":5,\"LEVEL1B\":6,\"e\":{\"Level1a\":8,\"Level1b\":9,\"Level1c\":10,\"Level1d\":11,\"x\":12},\"Loop1\":13,\"Loop2\":14,\"X\":15,\"Y\":16,\"Z\":17,\"Q\":18}"
if string(b) != want {
t.Errorf("Wrong marshal result.\n got: %q\nwant: %q", b, want)
}
}
func equalError(a, b error) bool {
if a == nil {
return b == nil
}
if b == nil {
return a == nil
}
return a.Error() == b.Error()
}
func TestUnmarshal(t *testing.T) {
for i, tt := range unmarshalTests {
t.Run(fmt.Sprintf("%d_%q", i, tt.in), func(t *testing.T) {
in := []byte(tt.in)
if tt.ptr == nil {
return
}
typ := reflect.TypeOf(tt.ptr)
if typ.Kind() != reflect.Ptr {
t.Errorf("#%d: unmarshalTest.ptr %T is not a pointer type", i, tt.ptr)
return
}
typ = typ.Elem()
// v = new(right-type)
v := reflect.New(typ)
if !reflect.DeepEqual(tt.ptr, v.Interface()) {
// There's no reason for ptr to point to non-zero data,
// as we decode into new(right-type), so the data is
// discarded.
// This can easily mean tests that silently don't test
// what they should. To test decoding into existing
// data, see TestPrefilled.
t.Errorf("#%d: unmarshalTest.ptr %#v is not a pointer to a zero value", i, tt.ptr)
return
}
dec := json.NewDecoder(bytes.NewReader(in))
if tt.useNumber {
dec.UseNumber()
}
if tt.disallowUnknownFields {
dec.DisallowUnknownFields()
}
if err := dec.Decode(v.Interface()); !equalError(err, tt.err) {
t.Errorf("#%d: %v, want %v", i, err, tt.err)
return
} else if err != nil {
return
}
if !reflect.DeepEqual(v.Elem().Interface(), tt.out) {
t.Errorf("#%d: mismatch\nhave: %#+v\nwant: %#+v", i, v.Elem().Interface(), tt.out)
data, _ := json.Marshal(v.Elem().Interface())
println(string(data))
data, _ = json.Marshal(tt.out)
println(string(data))
return
}
// Check round trip also decodes correctly.
if tt.err == nil {
enc, err := json.Marshal(v.Interface())
if err != nil {
t.Errorf("#%d: error re-marshaling: %v", i, err)
return
}
if tt.golden && !bytes.Equal(enc, in) {
t.Errorf("#%d: remarshal mismatch:\nhave: %s\nwant: %s", i, enc, in)
}
vv := reflect.New(reflect.TypeOf(tt.ptr).Elem())
dec = json.NewDecoder(bytes.NewReader(enc))
if tt.useNumber {
dec.UseNumber()
}
if err := dec.Decode(vv.Interface()); err != nil {
t.Errorf("#%d: error re-unmarshaling %#q: %v", i, enc, err)
return
}
if !reflect.DeepEqual(v.Elem().Interface(), vv.Elem().Interface()) {
t.Errorf("#%d: mismatch\nhave: %#+v\nwant: %#+v", i, v.Elem().Interface(), vv.Elem().Interface())
t.Errorf(" In: %q", strings.Map(noSpace, string(in)))
t.Errorf("Marshal: %q", strings.Map(noSpace, string(enc)))
return
}
}
})
}
}
func TestUnmarshalMarshal(t *testing.T) {
initBig()
var v interface{}
if err := json.Unmarshal(jsonBig, &v); err != nil {
t.Fatalf("Unmarshal: %v", err)
}
b, err := json.Marshal(v)
if err != nil {
t.Fatalf("Marshal: %v", err)
}
if !bytes.Equal(jsonBig, b) {
t.Errorf("Marshal jsonBig")
diff(t, b, jsonBig)
return
}
}
var numberTests = []struct {
in string
i int64
intErr string
f float64
floatErr string
}{
{in: "-1.23e1", intErr: "strconv.ParseInt: parsing \"-1.23e1\": invalid syntax", f: -1.23e1},
{in: "-12", i: -12, f: -12.0},
{in: "1e1000", intErr: "strconv.ParseInt: parsing \"1e1000\": invalid syntax", floatErr: "strconv.ParseFloat: parsing \"1e1000\": value out of range"},
}
// Independent of Decode, basic coverage of the accessors in Number
func TestNumberAccessors(t *testing.T) {
for _, tt := range numberTests {
n := json.Number(tt.in)
if s := n.String(); s != tt.in {
t.Errorf("Number(%q).String() is %q", tt.in, s)
}
if i, err := n.Int64(); err == nil && tt.intErr == "" && i != tt.i {
t.Errorf("Number(%q).Int64() is %d", tt.in, i)
} else if (err == nil && tt.intErr != "") || (err != nil && err.Error() != tt.intErr) {
t.Errorf("Number(%q).Int64() wanted error %q but got: %v", tt.in, tt.intErr, err)
}
if f, err := n.Float64(); err == nil && tt.floatErr == "" && f != tt.f {
t.Errorf("Number(%q).Float64() is %g", tt.in, f)
} else if (err == nil && tt.floatErr != "") || (err != nil && err.Error() != tt.floatErr) {
t.Errorf("Number(%q).Float64() wanted error %q but got: %v", tt.in, tt.floatErr, err)
}
}
}
func TestLargeByteSlice(t *testing.T) {
s0 := make([]byte, 2000)
for i := range s0 {
s0[i] = byte(i)
}
b, err := json.Marshal(s0)
if err != nil {
t.Fatalf("Marshal: %v", err)
}
var s1 []byte
if err := json.Unmarshal(b, &s1); err != nil {
t.Fatalf("Unmarshal: %v", err)
}
if !bytes.Equal(s0, s1) {
t.Errorf("Marshal large byte slice")
diff(t, s0, s1)
}
}
type Xint struct {
X int
}
func TestUnmarshalInterface(t *testing.T) {
var xint Xint
var i interface{} = &xint
if err := json.Unmarshal([]byte(`{"X":1}`), &i); err != nil {
t.Fatalf("Unmarshal: %v", err)
}
if xint.X != 1 {
t.Fatalf("Did not write to xint")
}
}
func TestUnmarshalPtrPtr(t *testing.T) {
var xint Xint
pxint := &xint
if err := json.Unmarshal([]byte(`{"X":1}`), &pxint); err != nil {
t.Fatalf("Unmarshal: %v", err)
}
if xint.X != 1 {
t.Fatalf("Did not write to xint")
}
}
func TestEscape(t *testing.T) {
const input = `"foobar"<html>` + " [\u2028 \u2029]"
const expected = `"\"foobar\"\u003chtml\u003e [\u2028 \u2029]"`
b, err := json.Marshal(input)
if err != nil {
t.Fatalf("Marshal error: %v", err)
}
if s := string(b); s != expected {
t.Errorf("Encoding of [%s]:\n got [%s]\nwant [%s]", input, s, expected)
}
}
// WrongString is a struct that's misusing the ,string modifier.
type WrongString struct {
Message string `json:"result,string"`
}
type wrongStringTest struct {
in, err string
}
var wrongStringTests = []wrongStringTest{
{`{"result":"x"}`, `invalid character 'x' looking for beginning of value`},
{`{"result":"foo"}`, `invalid character 'f' looking for beginning of value`},
{`{"result":"123"}`, `json: cannot unmarshal number into Go struct field WrongString.Message of type string`},
{`{"result":123}`, `json: cannot unmarshal number into Go struct field WrongString.Message of type string`},
{`{"result":"\""}`, `json: string unexpected end of JSON input`},
{`{"result":"\"foo"}`, `json: string unexpected end of JSON input`},
}
// If people misuse the ,string modifier, the error message should be
// helpful, telling the user that they're doing it wrong.
func TestErrorMessageFromMisusedString(t *testing.T) {
for n, tt := range wrongStringTests {
r := strings.NewReader(tt.in)
var s WrongString
err := json.NewDecoder(r).Decode(&s)
got := fmt.Sprintf("%v", err)
if got != tt.err {
t.Errorf("%d. got err = %q, want %q", n, got, tt.err)
}
}
}
func TestRefUnmarshal(t *testing.T) {
type S struct {
// Ref is defined in encode_test.go.
R0 Ref
R1 *Ref
R2 RefText
R3 *RefText
}
want := S{
R0: 12,
R1: new(Ref),
R2: 13,
R3: new(RefText),
}
*want.R1 = 12
*want.R3 = 13
var got S
if err := json.Unmarshal([]byte(`{"R0":"ref","R1":"ref","R2":"ref","R3":"ref"}`), &got); err != nil {
t.Fatalf("Unmarshal: %v", err)
}
if !reflect.DeepEqual(got, want) {
t.Errorf("got %+v, want %+v", got, want)
}
}
// Test that the empty string doesn't panic decoding when ,string is specified
// Issue 3450
func TestEmptyString(t *testing.T) {
type T2 struct {
Number1 int `json:",string"`
Number2 int `json:",string"`
}
data := `{"Number1":"1", "Number2":""}`
dec := json.NewDecoder(strings.NewReader(data))
var t2 T2
err := dec.Decode(&t2)
if err == nil {
t.Fatal("Decode: did not return error")
}
if t2.Number1 != 1 {
t.Fatal("Decode: did not set Number1")
}
}
// Test that a null for ,string is not replaced with the previous quoted string (issue 7046).
// It should also not be an error (issue 2540, issue 8587).
func TestNullString(t *testing.T) {
type T struct {
A int `json:",string"`
B int `json:",string"`
C *int `json:",string"`
}
data := []byte(`{"A": "1", "B": null, "C": null}`)
var s T
s.B = 1
s.C = new(int)
*s.C = 2
err := json.Unmarshal(data, &s)
if err != nil {
t.Fatalf("Unmarshal: %v", err)
}
if s.B != 1 || s.C != nil {
t.Fatalf("after Unmarshal, s.B=%d, s.C=%p, want 1, nil", s.B, s.C)
}
}
func intp(x int) *int {
p := new(int)
*p = x
return p
}
func intpp(x *int) **int {
pp := new(*int)
*pp = x
return pp
}
var interfaceSetTests = []struct {
pre interface{}
json string
post interface{}
}{
{"foo", `"bar"`, "bar"},
{"foo", `2`, 2.0},
{"foo", `true`, true},
{"foo", `null`, nil},
{nil, `null`, nil},
{new(int), `null`, nil},
{(*int)(nil), `null`, nil},
//{new(*int), `null`, new(*int)},
{(**int)(nil), `null`, nil},
{intp(1), `null`, nil},
//{intpp(nil), `null`, intpp(nil)},
//{intpp(intp(1)), `null`, intpp(nil)},
}
func TestInterfaceSet(t *testing.T) {
for idx, tt := range interfaceSetTests {
b := struct{ X interface{} }{tt.pre}
blob := `{"X":` + tt.json + `}`
if err := json.Unmarshal([]byte(blob), &b); err != nil {
t.Errorf("Unmarshal %#q: %v", blob, err)
continue
}
if !reflect.DeepEqual(b.X, tt.post) {
t.Errorf("%d: Unmarshal %#q into %#v: X=%#v, want %#v", idx, blob, tt.pre, b.X, tt.post)
}
}
}
// JSON null values should be ignored for primitives and string values instead of resulting in an error.
// Issue 2540
func TestUnmarshalNulls(t *testing.T) {
// Unmarshal docs:
// The JSON null value unmarshals into an interface, map, pointer, or slice
// by setting that Go value to nil. Because null is often used in JSON to mean
// ``not present,'' unmarshaling a JSON null into any other Go type has no effect
// on the value and produces no error.
jsonData := []byte(`{
"Bool" : null,
"Int" : null,
"Int8" : null,
"Int16" : null,
"Int32" : null,
"Int64" : null,
"Uint" : null,
"Uint8" : null,
"Uint16" : null,
"Uint32" : null,
"Uint64" : null,
"Float32" : null,
"Float64" : null,
"String" : null,
"PBool": null,
"Map": null,
"Slice": null,
"Interface": null,
"PRaw": null,
"PTime": null,
"PBigInt": null,
"PText": null,
"PBuffer": null,
"PStruct": null,
"Raw": null,
"Time": null,
"BigInt": null,
"Text": null,
"Buffer": null,
"Struct": null
}`)
nulls := NullTest{
Bool: true,
Int: 2,
Int8: 3,
Int16: 4,
Int32: 5,
Int64: 6,
Uint: 7,
Uint8: 8,
Uint16: 9,
Uint32: 10,
Uint64: 11,
Float32: 12.1,
Float64: 13.1,
String: "14",
PBool: new(bool),
Map: map[string]string{},
Slice: []string{},
Interface: new(MustNotUnmarshalJSON),
PRaw: new(json.RawMessage),
PTime: new(time.Time),
PBigInt: new(big.Int),
PText: new(MustNotUnmarshalText),
PStruct: new(struct{}),
PBuffer: new(bytes.Buffer),
Raw: json.RawMessage("123"),
Time: time.Unix(123456789, 0),
BigInt: *big.NewInt(123),
}
before := nulls.Time.String()
err := json.Unmarshal(jsonData, &nulls)
if err != nil {
t.Errorf("Unmarshal of null values failed: %v", err)
}
if !nulls.Bool || nulls.Int != 2 || nulls.Int8 != 3 || nulls.Int16 != 4 || nulls.Int32 != 5 || nulls.Int64 != 6 ||
nulls.Uint != 7 || nulls.Uint8 != 8 || nulls.Uint16 != 9 || nulls.Uint32 != 10 || nulls.Uint64 != 11 ||
nulls.Float32 != 12.1 || nulls.Float64 != 13.1 || nulls.String != "14" {
t.Errorf("Unmarshal of null values affected primitives")
}
if nulls.PBool != nil {
t.Errorf("Unmarshal of null did not clear nulls.PBool")
}
if nulls.Map != nil {
t.Errorf("Unmarshal of null did not clear nulls.Map")
}
if nulls.Slice != nil {
t.Errorf("Unmarshal of null did not clear nulls.Slice")
}
if nulls.Interface != nil {
t.Errorf("Unmarshal of null did not clear nulls.Interface")
}
if nulls.PRaw != nil {
t.Errorf("Unmarshal of null did not clear nulls.PRaw")
}
if nulls.PTime != nil {
t.Errorf("Unmarshal of null did not clear nulls.PTime")
}
if nulls.PBigInt != nil {
t.Errorf("Unmarshal of null did not clear nulls.PBigInt")
}
if nulls.PText != nil {
t.Errorf("Unmarshal of null did not clear nulls.PText")
}
if nulls.PBuffer != nil {
t.Errorf("Unmarshal of null did not clear nulls.PBuffer")
}
if nulls.PStruct != nil {
t.Errorf("Unmarshal of null did not clear nulls.PStruct")
}
if string(nulls.Raw) != "null" {
t.Errorf("Unmarshal of RawMessage null did not record null: %v", string(nulls.Raw))
}
if nulls.Time.String() != before {
t.Errorf("Unmarshal of time.Time null set time to %v", nulls.Time.String())
}
if nulls.BigInt.String() != "123" {
t.Errorf("Unmarshal of big.Int null set int to %v", nulls.BigInt.String())
}
}
func TestStringKind(t *testing.T) {
type stringKind string
var m1, m2 map[stringKind]int
m1 = map[stringKind]int{
"foo": 42,
}
data, err := json.Marshal(m1)
if err != nil {
t.Errorf("Unexpected error marshaling: %v", err)
}
err = json.Unmarshal(data, &m2)
if err != nil {
t.Errorf("Unexpected error unmarshaling: %v", err)
}
if !reflect.DeepEqual(m1, m2) {
t.Error("Items should be equal after encoding and then decoding")
}
}
// Custom types with []byte as underlying type could not be marshaled
// and then unmarshaled.
// Issue 8962.
func TestByteKind(t *testing.T) {
type byteKind []byte
a := byteKind("hello")
data, err := json.Marshal(a)
if err != nil {
t.Error(err)
}
var b byteKind
err = json.Unmarshal(data, &b)
if err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(a, b) {
t.Errorf("expected %v == %v", a, b)
}
}
// The fix for issue 8962 introduced a regression.
// Issue 12921.
func TestSliceOfCustomByte(t *testing.T) {
type Uint8 uint8
a := []Uint8("hello")
data, err := json.Marshal(a)
if err != nil {
t.Fatal(err)
}
var b []Uint8
err = json.Unmarshal(data, &b)
if err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(a, b) {
t.Fatalf("expected %v == %v", a, b)
}
}
var decodeTypeErrorTests = []struct {
dest interface{}
src string
}{
{new(string), `{"user": "name"}`}, // issue 4628.
{new(error), `{}`}, // issue 4222
{new(error), `[]`},
{new(error), `""`},
{new(error), `123`},
{new(error), `true`},
}
func TestUnmarshalTypeError(t *testing.T) {
for _, item := range decodeTypeErrorTests {
err := json.Unmarshal([]byte(item.src), item.dest)
if _, ok := err.(*json.UnmarshalTypeError); !ok {
t.Errorf("expected type error for Unmarshal(%q, type %T): got %T",
item.src, item.dest, err)
}
}
}
var unmarshalSyntaxTests = []string{
"tru",
"fals",
"nul",
"123e",
`"hello`,
`[1,2,3`,
`{"key":1`,
`{"key":1,`,
}
func TestUnmarshalSyntax(t *testing.T) {
var x interface{}
for _, src := range unmarshalSyntaxTests {
err := json.Unmarshal([]byte(src), &x)
if _, ok := err.(*json.SyntaxError); !ok {
t.Errorf("expected syntax error for Unmarshal(%q): got %T", src, err)
}
}
}
// Test handling of unexported fields that should be ignored.
// Issue 4660
type unexportedFields struct {
Name string
m map[string]interface{} `json:"-"`
m2 map[string]interface{} `json:"abcd"`
s []int `json:"-"`
}
func TestUnmarshalUnexported(t *testing.T) {
input := `{"Name": "Bob", "m": {"x": 123}, "m2": {"y": 456}, "abcd": {"z": 789}, "s": [2, 3]}`
want := &unexportedFields{Name: "Bob"}
out := &unexportedFields{}
err := json.Unmarshal([]byte(input), out)
if err != nil {
t.Errorf("got error %v, expected nil", err)
}
if !reflect.DeepEqual(out, want) {
t.Errorf("got %q, want %q", out, want)
}
}
// Time3339 is a time.Time which encodes to and from JSON
// as an RFC 3339 time in UTC.
type Time3339 time.Time
func (t *Time3339) UnmarshalJSON(b []byte) error {
if len(b) < 2 || b[0] != '"' || b[len(b)-1] != '"' {
return fmt.Errorf("types: failed to unmarshal non-string value %q as an RFC 3339 time", b)
}
tm, err := time.Parse(time.RFC3339, string(b[1:len(b)-1]))
if err != nil {
return err
}
*t = Time3339(tm)
return nil
}
func TestUnmarshalJSONLiteralError(t *testing.T) {
var t3 Time3339
err := json.Unmarshal([]byte(`"0000-00-00T00:00:00Z"`), &t3)
if err == nil {
t.Fatalf("expected error; got time %v", time.Time(t3))
}
if !strings.Contains(err.Error(), "range") {
t.Errorf("got err = %v; want out of range error", err)
}
}
// Test that extra object elements in an array do not result in a
// "data changing underfoot" error.
// Issue 3717
func TestSkipArrayObjects(t *testing.T) {
data := `[{}]`
var dest [0]interface{}
err := json.Unmarshal([]byte(data), &dest)
if err != nil {
t.Errorf("got error %q, want nil", err)
}
}
// Test semantics of pre-filled data, such as struct fields, map elements,
// slices, and arrays.
// Issues 4900 and 8837, among others.
func TestPrefilled(t *testing.T) {
// Values here change, cannot reuse table across runs.
var prefillTests = []struct {
in string
ptr interface{}
out interface{}
}{
{
in: `{"X": 1, "Y": 2}`,
ptr: &XYZ{X: float32(3), Y: int16(4), Z: 1.5},
out: &XYZ{X: float64(1), Y: float64(2), Z: 1.5},
},
{
in: `{"X": 1, "Y": 2}`,
ptr: &map[string]interface{}{"X": float32(3), "Y": int16(4), "Z": 1.5},
out: &map[string]interface{}{"X": float64(1), "Y": float64(2), "Z": 1.5},
},
{
in: `[2]`,
ptr: &[]int{1},
out: &[]int{2},
},
{
in: `[2, 3]`,
ptr: &[]int{1},
out: &[]int{2, 3},
},
{
in: `[2, 3]`,
ptr: &[...]int{1},
out: &[...]int{2},
},
{
in: `[3]`,
ptr: &[...]int{1, 2},
out: &[...]int{3, 0},
},
}
for _, tt := range prefillTests {
ptrstr := fmt.Sprintf("%v", tt.ptr)
err := json.Unmarshal([]byte(tt.in), tt.ptr) // tt.ptr edited here
if err != nil {
t.Errorf("Unmarshal: %v", err)
}
if !reflect.DeepEqual(tt.ptr, tt.out) {
t.Errorf("Unmarshal(%#q, %s): have %v, want %v", tt.in, ptrstr, tt.ptr, tt.out)
}
}
}
var invalidUnmarshalTests = []struct {
v interface{}
want string
}{
{nil, "json: Unmarshal(nil)"},
{struct{}{}, "json: Unmarshal(non-pointer struct {})"},
{(*int)(nil), "json: Unmarshal(nil *int)"},
}
func TestInvalidUnmarshal(t *testing.T) {
buf := []byte(`{"a":"1"}`)
for _, tt := range invalidUnmarshalTests {
err := json.Unmarshal(buf, tt.v)
if err == nil {
t.Errorf("Unmarshal expecting error, got nil")
continue
}
if got := err.Error(); got != tt.want {
t.Errorf("Unmarshal = %q; want %q", got, tt.want)
}
}
}
var invalidUnmarshalTextTests = []struct {
v interface{}
want string
}{
{nil, "json: Unmarshal(nil)"},
{struct{}{}, "json: Unmarshal(non-pointer struct {})"},
{(*int)(nil), "json: Unmarshal(nil *int)"},
{new(net.IP), "json: cannot unmarshal number into Go value of type *net.IP"},
}
func TestInvalidUnmarshalText(t *testing.T) {
buf := []byte(`123`)
for _, tt := range invalidUnmarshalTextTests {
err := json.Unmarshal(buf, tt.v)
if err == nil {
t.Errorf("Unmarshal expecting error, got nil")
continue
}
if got := err.Error(); got != tt.want {
t.Errorf("Unmarshal = %q; want %q", got, tt.want)
}
}
}
// Test that string option is ignored for invalid types.
// Issue 9812.
func TestInvalidStringOption(t *testing.T) {
num := 0
item := struct {
T time.Time `json:",string"`
M map[string]string `json:",string"`
S []string `json:",string"`
A [1]string `json:",string"`
I interface{} `json:",string"`
P *int `json:",string"`
}{M: make(map[string]string), S: make([]string, 0), I: num, P: &num}
data, err := json.Marshal(item)
if err != nil {
t.Fatalf("Marshal: %v", err)
}
err = json.Unmarshal(data, &item)
if err != nil {
t.Fatalf("Unmarshal: %v", err)
}
}
// Test unmarshal behavior with regards to embedded unexported structs.
//
// (Issue 21357) If the embedded struct is a pointer and is unallocated,
// this returns an error because unmarshal cannot set the field.
//
// (Issue 24152) If the embedded struct is given an explicit name,
// ensure that the normal unmarshal logic does not panic in reflect.
//
// (Issue 28145) If the embedded struct is given an explicit name and has
// exported methods, don't cause a panic trying to get its value.
func TestUnmarshalEmbeddedUnexported(t *testing.T) {
type (
embed1 struct{ Q int }
embed2 struct{ Q int }
embed3 struct {
Q int64 `json:",string"`
}
S1 struct {
*embed1
R int
}
S2 struct {
*embed1
Q int
}
S3 struct {
embed1
R int
}
S4 struct {
*embed1
embed2
}
S5 struct {
*embed3
R int
}
S6 struct {
embed1 `json:"embed1"`
}
S7 struct {
embed1 `json:"embed1"`
embed2
}
S8 struct {
embed1 `json:"embed1"`
embed2 `json:"embed2"`
Q int
}
S9 struct {
unexportedWithMethods `json:"embed"`
}
)
tests := []struct {
in string
ptr interface{}
out interface{}
err error
}{{
// Error since we cannot set S1.embed1, but still able to set S1.R.
in: `{"R":2,"Q":1}`,
ptr: new(S1),
out: &S1{R: 2},
err: fmt.Errorf("json: cannot set embedded pointer to unexported struct: json_test.embed1"),
}, {
// The top level Q field takes precedence.
in: `{"Q":1}`,
ptr: new(S2),
out: &S2{Q: 1},
}, {
// No issue with non-pointer variant.
in: `{"R":2,"Q":1}`,
ptr: new(S3),
out: &S3{embed1: embed1{Q: 1}, R: 2},
}, {
// No error since both embedded structs have field R, which annihilate each other.
// Thus, no attempt is made at setting S4.embed1.
in: `{"R":2}`,
ptr: new(S4),
out: new(S4),
}, {
// Error since we cannot set S5.embed1, but still able to set S5.R.
in: `{"R":2,"Q":1}`,
ptr: new(S5),
out: &S5{R: 2},
err: fmt.Errorf("json: cannot set embedded pointer to unexported struct: json_test.embed3"),
}, {
// Issue 24152, ensure decodeState.indirect does not panic.
in: `{"embed1": {"Q": 1}}`,
ptr: new(S6),
out: &S6{embed1{1}},
}, {
// Issue 24153, check that we can still set forwarded fields even in
// the presence of a name conflict.
//
// This relies on obscure behavior of reflect where it is possible
// to set a forwarded exported field on an unexported embedded struct
// even though there is a name conflict, even when it would have been
// impossible to do so according to Go visibility rules.
// Go forbids this because it is ambiguous whether S7.Q refers to
// S7.embed1.Q or S7.embed2.Q. Since embed1 and embed2 are unexported,
// it should be impossible for an external package to set either Q.
//
// It is probably okay for a future reflect change to break this.
in: `{"embed1": {"Q": 1}, "Q": 2}`,
ptr: new(S7),
out: &S7{embed1{1}, embed2{2}},
}, {
// Issue 24153, similar to the S7 case.
in: `{"embed1": {"Q": 1}, "embed2": {"Q": 2}, "Q": 3}`,
ptr: new(S8),
out: &S8{embed1{1}, embed2{2}, 3},
}, {
// Issue 228145, similar to the cases above.
in: `{"embed": {}}`,
ptr: new(S9),
out: &S9{},
}}
for i, tt := range tests {
err := json.Unmarshal([]byte(tt.in), tt.ptr)
if !equalError(err, tt.err) {
t.Errorf("#%d: %v, want %v", i, err, tt.err)
}
if !reflect.DeepEqual(tt.ptr, tt.out) {
t.Errorf("#%d: mismatch\ngot: %#+v\nwant: %#+v", i, tt.ptr, tt.out)
}
}
}
func TestUnmarshalErrorAfterMultipleJSON(t *testing.T) {
tests := []struct {
in string
err error
}{{
in: `1 false null :`,
err: json.NewSyntaxError("invalid character '\x00' looking for beginning of value", 14),
}, {
in: `1 [] [,]`,
err: json.NewSyntaxError("invalid character ',' looking for beginning of value", 6),
}, {
in: `1 [] [true:]`,
err: json.NewSyntaxError("json: slice unexpected end of JSON input", 10),
}, {
in: `1 {} {"x"=}`,
err: json.NewSyntaxError("expected colon after object key", 13),
}, {
in: `falsetruenul#`,
err: json.NewSyntaxError("json: invalid character # as null", 12),
}}
for i, tt := range tests {
dec := json.NewDecoder(strings.NewReader(tt.in))
var err error
for {
var v interface{}
if err = dec.Decode(&v); err != nil {
break
}
}
if !reflect.DeepEqual(err, tt.err) {
t.Errorf("#%d: got %#v, want %#v", i, err, tt.err)
}
}
}
type unmarshalPanic struct{}
func (unmarshalPanic) UnmarshalJSON([]byte) error { panic(0xdead) }
func TestUnmarshalPanic(t *testing.T) {
defer func() {
if got := recover(); !reflect.DeepEqual(got, 0xdead) {
t.Errorf("panic() = (%T)(%v), want 0xdead", got, got)
}
}()
json.Unmarshal([]byte("{}"), &unmarshalPanic{})
t.Fatalf("Unmarshal should have panicked")
}
// The decoder used to hang if decoding into an interface pointing to its own address.
// See golang.org/issues/31740.
func TestUnmarshalRecursivePointer(t *testing.T) {
var v interface{}
v = &v
data := []byte(`{"a": "b"}`)
if err := json.Unmarshal(data, v); err != nil {
t.Fatal(err)
}
}
type textUnmarshalerString string
func (m *textUnmarshalerString) UnmarshalText(text []byte) error {
*m = textUnmarshalerString(strings.ToLower(string(text)))
return nil
}
// Test unmarshal to a map, where the map key is a user defined type.
// See golang.org/issues/34437.
func TestUnmarshalMapWithTextUnmarshalerStringKey(t *testing.T) {
var p map[textUnmarshalerString]string
if err := json.Unmarshal([]byte(`{"FOO": "1"}`), &p); err != nil {
t.Fatalf("Unmarshal unexpected error: %v", err)
}
if _, ok := p["foo"]; !ok {
t.Errorf(`Key "foo" does not exist in map: %v`, p)
}
}
func TestUnmarshalRescanLiteralMangledUnquote(t *testing.T) {
// See golang.org/issues/38105.
var p map[textUnmarshalerString]string
if err := json.Unmarshal([]byte(`{"开源":"12345开源"}`), &p); err != nil {
t.Fatalf("Unmarshal unexpected error: %v", err)
}
if _, ok := p["开源"]; !ok {
t.Errorf(`Key "开源" does not exist in map: %v`, p)
}
// See golang.org/issues/38126.
type T struct {
F1 string `json:"F1,string"`
}
t1 := T{"aaa\tbbb"}
b, err := json.Marshal(t1)
if err != nil {
t.Fatalf("Marshal unexpected error: %v", err)
}
var t2 T
if err := json.Unmarshal(b, &t2); err != nil {
t.Fatalf("Unmarshal unexpected error: %v", err)
}
if t1 != t2 {
t.Errorf("Marshal and Unmarshal roundtrip mismatch: want %q got %q", t1, t2)
}
// See golang.org/issues/39555.
input := map[textUnmarshalerString]string{"FOO": "", `"`: ""}
encoded, err := json.Marshal(input)
if err != nil {
t.Fatalf("Marshal unexpected error: %v", err)
}
var got map[textUnmarshalerString]string
if err := json.Unmarshal(encoded, &got); err != nil {
t.Fatalf("Unmarshal unexpected error: %v", err)
}
want := map[textUnmarshalerString]string{"foo": "", `"`: ""}
if !reflect.DeepEqual(want, got) {
t.Fatalf("Unexpected roundtrip result:\nwant: %q\ngot: %q", want, got)
}
}
func TestUnmarshalMaxDepth(t *testing.T) {
testcases := []struct {
name string
data string
errMaxDepth bool
}{
{
name: "ArrayUnderMaxNestingDepth",
data: `{"a":` + strings.Repeat(`[`, 10000-1) + strings.Repeat(`]`, 10000-1) + `}`,
errMaxDepth: false,
},
{
name: "ArrayOverMaxNestingDepth",
data: `{"a":` + strings.Repeat(`[`, 10000) + strings.Repeat(`]`, 10000) + `}`,
errMaxDepth: true,
},
{
name: "ArrayOverStackDepth",
data: `{"a":` + strings.Repeat(`[`, 3000000) + strings.Repeat(`]`, 3000000) + `}`,
errMaxDepth: true,
},
{
name: "ObjectUnderMaxNestingDepth",
data: `{"a":` + strings.Repeat(`{"a":`, 10000-1) + `0` + strings.Repeat(`}`, 10000-1) + `}`,
errMaxDepth: false,
},
{
name: "ObjectOverMaxNestingDepth",
data: `{"a":` + strings.Repeat(`{"a":`, 10000) + `0` + strings.Repeat(`}`, 10000) + `}`,
errMaxDepth: true,
},
{
name: "ObjectOverStackDepth",
data: `{"a":` + strings.Repeat(`{"a":`, 3000000) + `0` + strings.Repeat(`}`, 3000000) + `}`,
errMaxDepth: true,
},
}
targets := []struct {
name string
newValue func() interface{}
}{
{
name: "unstructured",
newValue: func() interface{} {
var v interface{}
return &v
},
},
{
name: "typed named field",
newValue: func() interface{} {
v := struct {
A interface{} `json:"a"`
}{}
return &v
},
},
{
name: "typed missing field",
newValue: func() interface{} {
v := struct {
B interface{} `json:"b"`
}{}
return &v
},
},
{
name: "custom unmarshaler",
newValue: func() interface{} {
v := unmarshaler{}
return &v
},
},
}
for _, tc := range testcases {
for _, target := range targets {
t.Run(target.name+"-"+tc.name, func(t *testing.T) {
t.Run("unmarshal", func(t *testing.T) {
err := json.Unmarshal([]byte(tc.data), target.newValue())
if !tc.errMaxDepth {
if err != nil {
t.Errorf("unexpected error: %v", err)
}
} else {
if err == nil {
t.Errorf("expected error containing 'exceeded max depth', got none")
} else if !strings.Contains(err.Error(), "exceeded max depth") {
t.Errorf("expected error containing 'exceeded max depth', got: %v", err)
}
}
})
t.Run("stream", func(t *testing.T) {
err := json.NewDecoder(strings.NewReader(tc.data)).Decode(target.newValue())
if !tc.errMaxDepth {
if err != nil {
t.Errorf("unexpected error: %v", err)
}
} else {
if err == nil {
t.Errorf("expected error containing 'exceeded max depth', got none")
} else if !strings.Contains(err.Error(), "exceeded max depth") {
t.Errorf("expected error containing 'exceeded max depth', got: %v", err)
}
}
})
})
}
}
}
func TestDecodeSlice(t *testing.T) {
type B struct{ Int int32 }
type A struct{ B *B }
type X struct{ A []*A }
w1 := &X{}
w2 := &X{}
if err := json.Unmarshal([]byte(`{"a": [ {"b":{"int": 42} } ] }`), w1); err != nil {
t.Fatal(err)
}
w1addr := uintptr(unsafe.Pointer(w1.A[0].B))
if err := json.Unmarshal([]byte(`{"a": [ {"b":{"int": 112} } ] }`), w2); err != nil {
t.Fatal(err)
}
if uintptr(unsafe.Pointer(w1.A[0].B)) != w1addr {
t.Fatal("wrong addr")
}
w2addr := uintptr(unsafe.Pointer(w2.A[0].B))
if w1addr == w2addr {
t.Fatal("invaid address")
}
}
func TestDecodeMultipleUnmarshal(t *testing.T) {
data := []byte(`[{"AA":{"X":[{"a": "A"},{"b": "B"}],"Y":"y","Z":"z"},"BB":"bb"},{"AA":{"X":[],"Y":"y","Z":"z"},"BB":"bb"}]`)
var a []json.RawMessage
if err := json.Unmarshal(data, &a); err != nil {
t.Fatal(err)
}
if len(a) != 2 {
t.Fatalf("failed to decode: got %v", a)
}
t.Run("first", func(t *testing.T) {
data := a[0]
var v map[string]json.RawMessage
if err := json.Unmarshal(data, &v); err != nil {
t.Fatal(err)
}
if string(v["AA"]) != `{"X":[{"a": "A"},{"b": "B"}],"Y":"y","Z":"z"}` {
t.Fatalf("failed to decode. got %q", v["AA"])
}
var aa map[string]json.RawMessage
if err := json.Unmarshal(v["AA"], &aa); err != nil {
t.Fatal(err)
}
if string(aa["X"]) != `[{"a": "A"},{"b": "B"}]` {
t.Fatalf("failed to decode. got %q", v["X"])
}
var x []json.RawMessage
if err := json.Unmarshal(aa["X"], &x); err != nil {
t.Fatal(err)
}
if len(x) != 2 {
t.Fatalf("failed to decode: %v", x)
}
if string(x[0]) != `{"a": "A"}` {
t.Fatal("failed to decode")
}
if string(x[1]) != `{"b": "B"}` {
t.Fatal("failed to decode")
}
})
t.Run("second", func(t *testing.T) {
data := a[1]
var v map[string]json.RawMessage
if err := json.Unmarshal(data, &v); err != nil {
t.Fatal(err)
}
if string(v["AA"]) != `{"X":[],"Y":"y","Z":"z"}` {
t.Fatalf("failed to decode. got %q", v["AA"])
}
var aa map[string]json.RawMessage
if err := json.Unmarshal(v["AA"], &aa); err != nil {
t.Fatal(err)
}
if string(aa["X"]) != `[]` {
t.Fatalf("failed to decode. got %q", v["X"])
}
var x []json.RawMessage
if err := json.Unmarshal(aa["X"], &x); err != nil {
t.Fatal(err)
}
if len(x) != 0 {
t.Fatalf("failed to decode: %v", x)
}
})
}
func TestMultipleDecodeWithRawMessage(t *testing.T) {
original := []byte(`{
"Body": {
"List": [
{
"Returns": [
{
"Value": "10",
"nodeType": "Literal"
}
],
"nodeKind": "Return",
"nodeType": "Statement"
}
],
"nodeKind": "Block",
"nodeType": "Statement"
},
"nodeType": "Function"
}`)
var a map[string]json.RawMessage
if err := json.Unmarshal(original, &a); err != nil {
t.Fatal(err)
}
var b map[string]json.RawMessage
if err := json.Unmarshal(a["Body"], &b); err != nil {
t.Fatal(err)
}
var c []json.RawMessage
if err := json.Unmarshal(b["List"], &c); err != nil {
t.Fatal(err)
}
var d map[string]json.RawMessage
if err := json.Unmarshal(c[0], &d); err != nil {
t.Fatal(err)
}
var e []json.RawMessage
if err := json.Unmarshal(d["Returns"], &e); err != nil {
t.Fatal(err)
}
var f map[string]json.RawMessage
if err := json.Unmarshal(e[0], &f); err != nil {
t.Fatal(err)
}
}
type intUnmarshaler int
func (u *intUnmarshaler) UnmarshalJSON(b []byte) error {
if *u != 0 && *u != 10 {
return fmt.Errorf("failed to decode of slice with int unmarshaler")
}
*u = 10
return nil
}
type arrayUnmarshaler [5]int
func (u *arrayUnmarshaler) UnmarshalJSON(b []byte) error {
if (*u)[0] != 0 && (*u)[0] != 10 {
return fmt.Errorf("failed to decode of slice with array unmarshaler")
}
(*u)[0] = 10
return nil
}
type mapUnmarshaler map[string]int
func (u *mapUnmarshaler) UnmarshalJSON(b []byte) error {
if len(*u) != 0 && len(*u) != 1 {
return fmt.Errorf("failed to decode of slice with map unmarshaler")
}
*u = map[string]int{"a": 10}
return nil
}
type structUnmarshaler struct {
A int
notFirst bool
}
func (u *structUnmarshaler) UnmarshalJSON(b []byte) error {
if !u.notFirst && u.A != 0 {
return fmt.Errorf("failed to decode of slice with struct unmarshaler")
}
u.A = 10
u.notFirst = true
return nil
}
func TestSliceElemUnmarshaler(t *testing.T) {
t.Run("int", func(t *testing.T) {
var v []intUnmarshaler
if err := json.Unmarshal([]byte(`[1,2,3,4,5]`), &v); err != nil {
t.Fatal(err)
}
if len(v) != 5 {
t.Fatalf("failed to decode of slice with int unmarshaler: %v", v)
}
if v[0] != 10 {
t.Fatalf("failed to decode of slice with int unmarshaler: %v", v)
}
if err := json.Unmarshal([]byte(`[6]`), &v); err != nil {
t.Fatal(err)
}
if len(v) != 1 {
t.Fatalf("failed to decode of slice with int unmarshaler: %v", v)
}
if v[0] != 10 {
t.Fatalf("failed to decode of slice with int unmarshaler: %v", v)
}
})
t.Run("slice", func(t *testing.T) {
var v []json.RawMessage
if err := json.Unmarshal([]byte(`[1,2,3,4,5]`), &v); err != nil {
t.Fatal(err)
}
if len(v) != 5 {
t.Fatalf("failed to decode of slice with slice unmarshaler: %v", v)
}
if len(v[0]) != 1 {
t.Fatalf("failed to decode of slice with slice unmarshaler: %v", v)
}
if err := json.Unmarshal([]byte(`[6]`), &v); err != nil {
t.Fatal(err)
}
if len(v) != 1 {
t.Fatalf("failed to decode of slice with slice unmarshaler: %v", v)
}
if len(v[0]) != 1 {
t.Fatalf("failed to decode of slice with slice unmarshaler: %v", v)
}
})
t.Run("array", func(t *testing.T) {
var v []arrayUnmarshaler
if err := json.Unmarshal([]byte(`[1,2,3,4,5]`), &v); err != nil {
t.Fatal(err)
}
if len(v) != 5 {
t.Fatalf("failed to decode of slice with array unmarshaler: %v", v)
}
if v[0][0] != 10 {
t.Fatalf("failed to decode of slice with array unmarshaler: %v", v)
}
if err := json.Unmarshal([]byte(`[6]`), &v); err != nil {
t.Fatal(err)
}
if len(v) != 1 {
t.Fatalf("failed to decode of slice with array unmarshaler: %v", v)
}
if v[0][0] != 10 {
t.Fatalf("failed to decode of slice with array unmarshaler: %v", v)
}
})
t.Run("map", func(t *testing.T) {
var v []mapUnmarshaler
if err := json.Unmarshal([]byte(`[{"a":1},{"b":2},{"c":3},{"d":4},{"e":5}]`), &v); err != nil {
t.Fatal(err)
}
if len(v) != 5 {
t.Fatalf("failed to decode of slice with map unmarshaler: %v", v)
}
if v[0]["a"] != 10 {
t.Fatalf("failed to decode of slice with map unmarshaler: %v", v)
}
if err := json.Unmarshal([]byte(`[6]`), &v); err != nil {
t.Fatal(err)
}
if len(v) != 1 {
t.Fatalf("failed to decode of slice with map unmarshaler: %v", v)
}
if v[0]["a"] != 10 {
t.Fatalf("failed to decode of slice with map unmarshaler: %v", v)
}
})
t.Run("struct", func(t *testing.T) {
var v []structUnmarshaler
if err := json.Unmarshal([]byte(`[1,2,3,4,5]`), &v); err != nil {
t.Fatal(err)
}
if len(v) != 5 {
t.Fatalf("failed to decode of slice with struct unmarshaler: %v", v)
}
if v[0].A != 10 {
t.Fatalf("failed to decode of slice with struct unmarshaler: %v", v)
}
if err := json.Unmarshal([]byte(`[6]`), &v); err != nil {
t.Fatal(err)
}
if len(v) != 1 {
t.Fatalf("failed to decode of slice with struct unmarshaler: %v", v)
}
if v[0].A != 10 {
t.Fatalf("failed to decode of slice with struct unmarshaler: %v", v)
}
})
}
type keepRefTest struct {
A int
B string
}
func (t *keepRefTest) UnmarshalJSON(data []byte) error {
v := []interface{}{&t.A, &t.B}
return json.Unmarshal(data, &v)
}
func TestKeepReferenceSlice(t *testing.T) {
var v keepRefTest
if err := json.Unmarshal([]byte(`[54,"hello"]`), &v); err != nil {
t.Fatal(err)
}
if v.A != 54 {
t.Fatal("failed to keep reference for slice")
}
if v.B != "hello" {
t.Fatal("failed to keep reference for slice")
}
}
func TestInvalidTopLevelValue(t *testing.T) {
t.Run("invalid end of buffer", func(t *testing.T) {
var v struct{}
if err := stdjson.Unmarshal([]byte(`{}0`), &v); err == nil {
t.Fatal("expected error")
}
if err := json.Unmarshal([]byte(`{}0`), &v); err == nil {
t.Fatal("expected error")
}
})
t.Run("invalid object", func(t *testing.T) {
var v interface{}
if err := stdjson.Unmarshal([]byte(`{"a":4}{"a"5}`), &v); err == nil {
t.Fatal("expected error")
}
if err := json.Unmarshal([]byte(`{"a":4}{"a"5}`), &v); err == nil {
t.Fatal("expected error")
}
})
}
func TestInvalidNumber(t *testing.T) {
t.Run("invalid length of number", func(t *testing.T) {
invalidNum := strings.Repeat("1", 30)
t.Run("int", func(t *testing.T) {
var v int64
stdErr := stdjson.Unmarshal([]byte(invalidNum), &v)
if stdErr == nil {
t.Fatal("expected error")
}
err := json.Unmarshal([]byte(invalidNum), &v)
if err == nil {
t.Fatal("expected error")
}
if stdErr.Error() != err.Error() {
t.Fatalf("unexpected error message. expected: %q but got %q", stdErr.Error(), err.Error())
}
})
t.Run("uint", func(t *testing.T) {
var v uint64
stdErr := stdjson.Unmarshal([]byte(invalidNum), &v)
if stdErr == nil {
t.Fatal("expected error")
}
err := json.Unmarshal([]byte(invalidNum), &v)
if err == nil {
t.Fatal("expected error")
}
if stdErr.Error() != err.Error() {
t.Fatalf("unexpected error message. expected: %q but got %q", stdErr.Error(), err.Error())
}
})
})
t.Run("invalid number of zero", func(t *testing.T) {
t.Run("int", func(t *testing.T) {
invalidNum := strings.Repeat("0", 10)
var v int64
stdErr := stdjson.Unmarshal([]byte(invalidNum), &v)
if stdErr == nil {
t.Fatal("expected error")
}
err := json.Unmarshal([]byte(invalidNum), &v)
if err == nil {
t.Fatal("expected error")
}
if stdErr.Error() != err.Error() {
t.Fatalf("unexpected error message. expected: %q but got %q", stdErr.Error(), err.Error())
}
})
t.Run("uint", func(t *testing.T) {
invalidNum := strings.Repeat("0", 10)
var v uint64
stdErr := stdjson.Unmarshal([]byte(invalidNum), &v)
if stdErr == nil {
t.Fatal("expected error")
}
err := json.Unmarshal([]byte(invalidNum), &v)
if err == nil {
t.Fatal("expected error")
}
if stdErr.Error() != err.Error() {
t.Fatalf("unexpected error message. expected: %q but got %q", stdErr.Error(), err.Error())
}
})
})
t.Run("invalid number", func(t *testing.T) {
t.Run("int", func(t *testing.T) {
t.Run("-0", func(t *testing.T) {
var v int64
if err := stdjson.Unmarshal([]byte(`-0`), &v); err != nil {
t.Fatal(err)
}
if err := json.Unmarshal([]byte(`-0`), &v); err != nil {
t.Fatal(err)
}
})
t.Run("+0", func(t *testing.T) {
var v int64
if err := stdjson.Unmarshal([]byte(`+0`), &v); err == nil {
t.Error("expected error")
}
if err := json.Unmarshal([]byte(`+0`), &v); err == nil {
t.Error("expected error")
}
})
})
t.Run("uint", func(t *testing.T) {
t.Run("-0", func(t *testing.T) {
var v uint64
if err := stdjson.Unmarshal([]byte(`-0`), &v); err == nil {
t.Error("expected error")
}
if err := json.Unmarshal([]byte(`-0`), &v); err == nil {
t.Error("expected error")
}
})
t.Run("+0", func(t *testing.T) {
var v uint64
if err := stdjson.Unmarshal([]byte(`+0`), &v); err == nil {
t.Error("expected error")
}
if err := json.Unmarshal([]byte(`+0`), &v); err == nil {
t.Error("expected error")
}
})
})
t.Run("float", func(t *testing.T) {
t.Run("0.0", func(t *testing.T) {
var f float64
if err := stdjson.Unmarshal([]byte(`0.0`), &f); err != nil {
t.Fatal(err)
}
if err := json.Unmarshal([]byte(`0.0`), &f); err != nil {
t.Fatal(err)
}
})
t.Run("0.000000000", func(t *testing.T) {
var f float64
if err := stdjson.Unmarshal([]byte(`0.000000000`), &f); err != nil {
t.Fatal(err)
}
if err := json.Unmarshal([]byte(`0.000000000`), &f); err != nil {
t.Fatal(err)
}
})
t.Run("repeat zero a lot with float value", func(t *testing.T) {
var f float64
if err := stdjson.Unmarshal([]byte("0."+strings.Repeat("0", 30)), &f); err != nil {
t.Fatal(err)
}
if err := json.Unmarshal([]byte("0."+strings.Repeat("0", 30)), &f); err != nil {
t.Fatal(err)
}
})
})
})
}
type someInterface interface {
DoesNotMatter()
}
func TestDecodeUnknownInterface(t *testing.T) {
t.Run("unmarshal", func(t *testing.T) {
var v map[string]someInterface
if err := json.Unmarshal([]byte(`{"a":null,"b":null}`), &v); err != nil {
t.Fatal(err)
}
if len(v) != 2 {
t.Fatalf("failed to decode: %v", v)
}
if a, exists := v["a"]; a != nil || !exists {
t.Fatalf("failed to decode: %v", v)
}
if b, exists := v["b"]; b != nil || !exists {
t.Fatalf("failed to decode: %v", v)
}
})
t.Run("stream", func(t *testing.T) {
var v map[string]someInterface
if err := json.NewDecoder(strings.NewReader(`{"a":null,"b":null}`)).Decode(&v); err != nil {
t.Fatal(err)
}
if len(v) != 2 {
t.Fatalf("failed to decode: %v", v)
}
if a, exists := v["a"]; a != nil || !exists {
t.Fatalf("failed to decode: %v", v)
}
if b, exists := v["b"]; b != nil || !exists {
t.Fatalf("failed to decode: %v", v)
}
})
}
func TestDecodeByteSliceNull(t *testing.T) {
t.Run("unmarshal", func(t *testing.T) {
var v1 []byte
if err := stdjson.Unmarshal([]byte(`null`), &v1); err != nil {
t.Fatal(err)
}
var v2 []byte
if err := json.Unmarshal([]byte(`null`), &v2); err != nil {
t.Fatal(err)
}
if v1 == nil && v2 != nil || len(v1) != len(v2) {
t.Fatalf("failed to decode null to []byte. expected:%#v but got %#v", v1, v2)
}
})
t.Run("stream", func(t *testing.T) {
var v1 []byte
if err := stdjson.NewDecoder(strings.NewReader(`null`)).Decode(&v1); err != nil {
t.Fatal(err)
}
var v2 []byte
if err := json.NewDecoder(strings.NewReader(`null`)).Decode(&v2); err != nil {
t.Fatal(err)
}
if v1 == nil && v2 != nil || len(v1) != len(v2) {
t.Fatalf("failed to decode null to []byte. expected:%#v but got %#v", v1, v2)
}
})
}
func TestDecodeBackSlash(t *testing.T) {
t.Run("unmarshal", func(t *testing.T) {
t.Run("string", func(t *testing.T) {
var v1 map[string]stdjson.RawMessage
if err := stdjson.Unmarshal([]byte(`{"c":"\\"}`), &v1); err != nil {
t.Fatal(err)
}
var v2 map[string]json.RawMessage
if err := json.Unmarshal([]byte(`{"c":"\\"}`), &v2); err != nil {
t.Fatal(err)
}
if len(v1) != len(v2) || !bytes.Equal(v1["c"], v2["c"]) {
t.Fatalf("failed to decode backslash: expected %#v but got %#v", v1, v2)
}
})
t.Run("array", func(t *testing.T) {
var v1 map[string]stdjson.RawMessage
if err := stdjson.Unmarshal([]byte(`{"c":["\\"]}`), &v1); err != nil {
t.Fatal(err)
}
var v2 map[string]json.RawMessage
if err := json.Unmarshal([]byte(`{"c":["\\"]}`), &v2); err != nil {
t.Fatal(err)
}
if len(v1) != len(v2) || !bytes.Equal(v1["c"], v2["c"]) {
t.Fatalf("failed to decode backslash: expected %#v but got %#v", v1, v2)
}
})
t.Run("object", func(t *testing.T) {
var v1 map[string]stdjson.RawMessage
if err := stdjson.Unmarshal([]byte(`{"c":{"\\":"\\"}}`), &v1); err != nil {
t.Fatal(err)
}
var v2 map[string]json.RawMessage
if err := json.Unmarshal([]byte(`{"c":{"\\":"\\"}}`), &v2); err != nil {
t.Fatal(err)
}
if len(v1) != len(v2) || !bytes.Equal(v1["c"], v2["c"]) {
t.Fatalf("failed to decode backslash: expected %#v but got %#v", v1, v2)
}
})
})
t.Run("stream", func(t *testing.T) {
t.Run("string", func(t *testing.T) {
var v1 map[string]stdjson.RawMessage
if err := stdjson.NewDecoder(strings.NewReader(`{"c":"\\"}`)).Decode(&v1); err != nil {
t.Fatal(err)
}
var v2 map[string]json.RawMessage
if err := json.NewDecoder(strings.NewReader(`{"c":"\\"}`)).Decode(&v2); err != nil {
t.Fatal(err)
}
if len(v1) != len(v2) || !bytes.Equal(v1["c"], v2["c"]) {
t.Fatalf("failed to decode backslash: expected %#v but got %#v", v1, v2)
}
})
t.Run("array", func(t *testing.T) {
var v1 map[string]stdjson.RawMessage
if err := stdjson.NewDecoder(strings.NewReader(`{"c":["\\"]}`)).Decode(&v1); err != nil {
t.Fatal(err)
}
var v2 map[string]json.RawMessage
if err := json.NewDecoder(strings.NewReader(`{"c":["\\"]}`)).Decode(&v2); err != nil {
t.Fatal(err)
}
if len(v1) != len(v2) || !bytes.Equal(v1["c"], v2["c"]) {
t.Fatalf("failed to decode backslash: expected %#v but got %#v", v1, v2)
}
})
t.Run("object", func(t *testing.T) {
var v1 map[string]stdjson.RawMessage
if err := stdjson.NewDecoder(strings.NewReader(`{"c":{"\\":"\\"}}`)).Decode(&v1); err != nil {
t.Fatal(err)
}
var v2 map[string]json.RawMessage
if err := json.NewDecoder(strings.NewReader(`{"c":{"\\":"\\"}}`)).Decode(&v2); err != nil {
t.Fatal(err)
}
if len(v1) != len(v2) || !bytes.Equal(v1["c"], v2["c"]) {
t.Fatalf("failed to decode backslash: expected %#v but got %#v", v1, v2)
}
})
})
}
func TestIssue218(t *testing.T) {
type A struct {
X int
}
type B struct {
Y int
}
type S struct {
A *A `json:"a,omitempty"`
B *B `json:"b,omitempty"`
}
tests := []struct {
name string
given []S
expected []S
}{
{
name: "A should be correct",
given: []S{{
A: &A{
X: 1,
},
}},
expected: []S{{
A: &A{
X: 1,
},
}},
},
{
name: "B should be correct",
given: []S{{
B: &B{
Y: 2,
},
}},
expected: []S{{
B: &B{
Y: 2,
},
}},
},
}
for _, test := range tests {
test := test
t.Run(test.name, func(t *testing.T) {
var buf bytes.Buffer
if err := json.NewEncoder(&buf).Encode(test.given); err != nil {
t.Fatal(err)
}
var actual []S
if err := json.NewDecoder(bytes.NewReader(buf.Bytes())).Decode(&actual); err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(test.expected, actual) {
t.Fatalf("mismatch value: expected %v but got %v", test.expected, actual)
}
})
}
}
func TestDecodeEscapedCharField(t *testing.T) {
b := []byte(`{"\u6D88\u606F":"\u6D88\u606F"}`)
t.Run("unmarshal", func(t *testing.T) {
v := struct {
Msg string `json:"消息"`
}{}
if err := json.Unmarshal(b, &v); err != nil {
t.Fatal(err)
}
if !bytes.Equal([]byte(v.Msg), []byte("消息")) {
t.Fatal("failed to decode unicode char")
}
})
t.Run("stream", func(t *testing.T) {
v := struct {
Msg string `json:"消息"`
}{}
if err := json.NewDecoder(bytes.NewBuffer(b)).Decode(&v); err != nil {
t.Fatal(err)
}
if !bytes.Equal([]byte(v.Msg), []byte("消息")) {
t.Fatal("failed to decode unicode char")
}
})
}
type unmarshalContextKey struct{}
type unmarshalContextStructType struct {
v int
}
func (t *unmarshalContextStructType) UnmarshalJSON(ctx context.Context, b []byte) error {
v := ctx.Value(unmarshalContextKey{})
s, ok := v.(string)
if !ok {
return fmt.Errorf("failed to propagate parent context.Context")
}
if s != "hello" {
return fmt.Errorf("failed to propagate parent context.Context")
}
t.v = 100
return nil
}
func TestDecodeContextOption(t *testing.T) {
src := []byte("10")
buf := bytes.NewBuffer(src)
t.Run("UnmarshalContext", func(t *testing.T) {
ctx := context.WithValue(context.Background(), unmarshalContextKey{}, "hello")
var v unmarshalContextStructType
if err := json.UnmarshalContext(ctx, src, &v); err != nil {
t.Fatal(err)
}
if v.v != 100 {
t.Fatal("failed to decode with context")
}
})
t.Run("DecodeContext", func(t *testing.T) {
ctx := context.WithValue(context.Background(), unmarshalContextKey{}, "hello")
var v unmarshalContextStructType
if err := json.NewDecoder(buf).DecodeContext(ctx, &v); err != nil {
t.Fatal(err)
}
if v.v != 100 {
t.Fatal("failed to decode with context")
}
})
}
func TestIssue251(t *testing.T) {
array := [3]int{1, 2, 3}
err := stdjson.Unmarshal([]byte("[ ]"), &array)
if err != nil {
t.Fatal(err)
}
t.Log(array)
array = [3]int{1, 2, 3}
err = json.Unmarshal([]byte("[ ]"), &array)
if err != nil {
t.Fatal(err)
}
t.Log(array)
array = [3]int{1, 2, 3}
err = json.NewDecoder(strings.NewReader(`[ ]`)).Decode(&array)
if err != nil {
t.Fatal(err)
}
t.Log(array)
}
func TestDecodeBinaryTypeWithEscapedChar(t *testing.T) {
type T struct {
Msg []byte `json:"msg"`
}
content := []byte(`{"msg":"aGVsbG8K\n"}`)
t.Run("unmarshal", func(t *testing.T) {
var expected T
if err := stdjson.Unmarshal(content, &expected); err != nil {
t.Fatal(err)
}
var got T
if err := json.Unmarshal(content, &got); err != nil {
t.Fatal(err)
}
if !bytes.Equal(expected.Msg, got.Msg) {
t.Fatalf("failed to decode binary type with escaped char. expected %q but got %q", expected.Msg, got.Msg)
}
})
t.Run("stream", func(t *testing.T) {
var expected T
if err := stdjson.NewDecoder(bytes.NewBuffer(content)).Decode(&expected); err != nil {
t.Fatal(err)
}
var got T
if err := json.NewDecoder(bytes.NewBuffer(content)).Decode(&got); err != nil {
t.Fatal(err)
}
if !bytes.Equal(expected.Msg, got.Msg) {
t.Fatalf("failed to decode binary type with escaped char. expected %q but got %q", expected.Msg, got.Msg)
}
})
}
func TestIssue282(t *testing.T) {
var J = []byte(`{
"a": {},
"b": {},
"c": {},
"d": {},
"e": {},
"f": {},
"g": {},
"h": {
"m": "1"
},
"i": {}
}`)
type T4 struct {
F0 string
F1 string
F2 string
F3 string
F4 string
F5 string
F6 int
}
type T3 struct {
F0 string
F1 T4
}
type T2 struct {
F0 string `json:"m"`
F1 T3
}
type T0 map[string]T2
// T2 size is 136 bytes. This is indirect type.
var v T0
if err := json.Unmarshal(J, &v); err != nil {
t.Fatal(err)
}
if v["h"].F0 != "1" {
t.Fatalf("failed to assign map value")
}
}
func TestDecodeStructFieldMap(t *testing.T) {
type Foo struct {
Bar map[float64]float64 `json:"bar,omitempty"`
}
var v Foo
if err := json.Unmarshal([]byte(`{"name":"test"}`), &v); err != nil {
t.Fatal(err)
}
if v.Bar != nil {
t.Fatalf("failed to decode v.Bar = %+v", v.Bar)
}
}
type issue303 struct {
Count int
Type string
Value interface{}
}
func (t *issue303) UnmarshalJSON(b []byte) error {
type tmpType issue303
wrapped := struct {
Value json.RawMessage
tmpType
}{}
if err := json.Unmarshal(b, &wrapped); err != nil {
return err
}
*t = issue303(wrapped.tmpType)
switch wrapped.Type {
case "string":
var str string
if err := json.Unmarshal(wrapped.Value, &str); err != nil {
return err
}
t.Value = str
}
return nil
}
func TestIssue303(t *testing.T) {
var v issue303
if err := json.Unmarshal([]byte(`{"Count":7,"Type":"string","Value":"hello"}`), &v); err != nil {
t.Fatal(err)
}
if v.Count != 7 || v.Type != "string" || v.Value != "hello" {
t.Fatalf("failed to decode. count = %d type = %s value = %v", v.Count, v.Type, v.Value)
}
}
func TestIssue327(t *testing.T) {
var v struct {
Date time.Time `json:"date"`
}
dec := json.NewDecoder(strings.NewReader(`{"date": "2021-11-23T13:47:30+01:00"})`))
if err := dec.DecodeContext(context.Background(), &v); err != nil {
t.Fatal(err)
}
expected := "2021-11-23T13:47:30+01:00"
if got := v.Date.Format(time.RFC3339); got != expected {
t.Fatalf("failed to decode. expected %q but got %q", expected, got)
}
}
func TestIssue337(t *testing.T) {
in := strings.Repeat(" ", 510) + "{}"
var m map[string]string
if err := json.NewDecoder(strings.NewReader(in)).Decode(&m); err != nil {
t.Fatal("unexpected error:", err)
}
if len(m) != 0 {
t.Fatal("unexpected result", m)
}
}
func Benchmark306(b *testing.B) {
type T0 struct {
Str string
}
in := []byte(`{"Str":"` + strings.Repeat(`abcd\"`, 10000) + `"}`)
b.Run("stdjson", func(b *testing.B) {
var x T0
for i := 0; i < b.N; i++ {
stdjson.Unmarshal(in, &x)
}
})
b.Run("go-json", func(b *testing.B) {
var x T0
for i := 0; i < b.N; i++ {
json.Unmarshal(in, &x)
}
})
}
func TestIssue348(t *testing.T) {
in := strings.Repeat("["+strings.Repeat(",1000", 500)[1:]+"]", 2)
dec := json.NewDecoder(strings.NewReader(in))
for dec.More() {
var foo interface{}
if err := dec.Decode(&foo); err != nil {
t.Error(err)
}
}
}
type issue342 string
func (t *issue342) UnmarshalJSON(b []byte) error {
panic("unreachable")
}
func TestIssue342(t *testing.T) {
var v map[issue342]int
in := []byte(`{"a":1}`)
if err := json.Unmarshal(in, &v); err != nil {
t.Errorf("unexpected error: %v", err)
}
expected := 1
if got := v["a"]; got != expected {
t.Errorf("unexpected result: got(%v) != expected(%v)", got, expected)
}
}
func TestIssue360(t *testing.T) {
var uints []uint8
err := json.Unmarshal([]byte(`[0, 1, 2]`), &uints)
if err != nil {
t.Errorf("unexpected error: %v", err)
}
if len(uints) != 3 || !(uints[0] == 0 && uints[1] == 1 && uints[2] == 2) {
t.Errorf("unexpected result: %v", uints)
}
}
func TestIssue359(t *testing.T) {
var a interface{} = 1
var b interface{} = &a
var c interface{} = &b
v, err := json.Marshal(c)
if err != nil {
t.Errorf("unexpected error: %v", err)
}
if string(v) != "1" {
t.Errorf("unexpected result: %v", string(v))
}
}
func TestIssue364(t *testing.T) {
var v struct {
Description string `json:"description"`
}
err := json.Unmarshal([]byte(`{"description":"\uD83D\uDE87 Toledo is a metro station"}`), &v)
if err != nil {
t.Errorf("unexpected error: %v", err)
}
if v.Description != "🚇 Toledo is a metro station" {
t.Errorf("unexpected result: %v", v.Description)
}
}
func TestIssue362(t *testing.T) {
type AliasedPrimitive int
type Combiner struct {
SomeField int
AliasedPrimitive
}
originalCombiner := Combiner{AliasedPrimitive: 7}
b, err := json.Marshal(originalCombiner)
assertErr(t, err)
newCombiner := Combiner{}
err = json.Unmarshal(b, &newCombiner)
assertErr(t, err)
assertEq(t, "TestEmbeddedPrimitiveAlias", originalCombiner, newCombiner)
}
func TestIssue335(t *testing.T) {
var v []string
in := []byte(`["\u","A"]`)
err := json.Unmarshal(in, &v)
if err == nil {
t.Errorf("unexpected success")
}
}
func TestIssue372(t *testing.T) {
type A int
type T struct {
_ int
*A
}
var v T
err := json.Unmarshal([]byte(`{"A":7}`), &v)
assertErr(t, err)
got := *v.A
expected := A(7)
if got != expected {
t.Errorf("unexpected result: %v != %v", got, expected)
}
}
type issue384 struct{}
func (t *issue384) UnmarshalJSON(b []byte) error {
return nil
}
func TestIssue384(t *testing.T) {
testcases := []string{
`{"data": "` + strings.Repeat("-", 500) + `\""}`,
`["` + strings.Repeat("-", 508) + `\""]`,
}
for _, tc := range testcases {
dec := json.NewDecoder(strings.NewReader(tc))
var v issue384
if err := dec.Decode(&v); err != nil {
t.Errorf("unexpected error: %v", err)
}
}
}
func TestIssue408(t *testing.T) {
type T struct {
Arr [2]int32 `json:"arr"`
}
var v T
if err := json.Unmarshal([]byte(`{"arr": [1,2]}`), &v); err != nil {
t.Fatal(err)
}
}
func TestIssue416(t *testing.T) {
b := []byte(`{"Сообщение":"Текст"}`)
type T struct {
Msg string `json:"Сообщение"`
}
var x T
err := json.Unmarshal(b, &x)
assertErr(t, err)
assertEq(t, "unexpected result", "Текст", x.Msg)
}
func TestIssue429(t *testing.T) {
var x struct {
N int32
}
for _, b := range []string{
`{"\u"`,
`{"\u0"`,
`{"\u00"`,
} {
if err := json.Unmarshal([]byte(b), &x); err == nil {
t.Errorf("unexpected success")
}
}
}