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decode_test.go
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// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package json
import (
"bytes"
"encoding"
"errors"
"fmt"
"image"
"math"
"math/big"
"net"
"reflect"
"strconv"
"strings"
"testing"
"time"
)
type T struct {
X string
Y int
Z int `json:"-"`
}
type U struct {
Alphabet string `json:"alpha"`
}
type V struct {
F1 any
F2 int32
F3 Number
F4 *VOuter
}
type VOuter struct {
V V
}
// ifaceNumAsFloat64/ifaceNumAsNumber are used to test unmarshaling with and
// without UseNumber.
var ifaceNumAsFloat64 = map[string]any{
"k1": float64(1),
"k2": "s",
"k3": []any{float64(1), float64(2.0), float64(3e-3)},
"k4": map[string]any{"kk1": "s", "kk2": float64(2)},
}
var ifaceNumAsNumber = map[string]any{
"k1": Number("1"),
"k2": "s",
"k3": []any{Number("1"), Number("2.0"), Number("3e-3")},
"k4": map[string]any{"kk1": "s", "kk2": Number("2")},
}
type tx struct {
x int //nolint:unused // Used via reflection.
}
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
}
type unmarshalerText struct {
A, B string
}
// MarshalText is needed for re-marshaling tests.
func (u unmarshalerText) MarshalText() ([]byte, error) {
return []byte(u.A + ":" + u.B), nil
}
func (u *unmarshalerText) UnmarshalText(b []byte) error {
pos := bytes.Index(b, []byte(":"))
if pos == -1 {
return errors.New("missing separator")
}
u.A, u.B = string(b[:pos]), string(b[pos+1:])
return nil
}
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 (
um0, um1 unmarshaler // target2 of unmarshaling
ump = &um1
umtrue = unmarshaler{true}
umslice = []unmarshaler{{true}}
umslicep = new([]unmarshaler)
umstruct = ustruct{unmarshaler{true}}
um0T, um1T unmarshalerText // target2 of unmarshaling
umpType = &um1T
umtrueXY = unmarshalerText{"x", "y"}
umsliceXY = []unmarshalerText{{"x", "y"}}
umslicepType = new([]unmarshalerText)
umstructType = new(ustructText)
umstructXY = ustructText{unmarshalerText{"x", "y"}}
ummapType = map[unmarshalerText]bool{}
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 any
Y any
Z any
}
func sliceAddr(x []int) *[]int { return &x }
func mapAddr(x map[string]int) *map[string]int { return &x }
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 unmarshalTest struct {
in string
ptr any
out any
err error
useNumber bool
golden bool
useOrderedObject bool
}
type B struct {
B bool `json:",string"`
}
var unmarshalTests = []unmarshalTest{
// basic types
{in: `true`, ptr: new(bool), out: true},
{in: `1`, ptr: new(int), out: 1},
{in: `1.2`, ptr: new(float64), out: 1.2},
{in: `-5`, ptr: new(int16), out: int16(-5)},
{in: `2`, ptr: new(Number), out: Number("2"), useNumber: true},
{in: `2`, ptr: new(Number), out: Number("2")},
{in: `2`, ptr: new(any), out: float64(2.0)},
{in: `2`, ptr: new(any), out: Number("2"), useNumber: true},
{in: `"a\u1234"`, ptr: new(string), out: "a\u1234"},
{in: `"http:\/\/"`, ptr: new(string), out: "http://"},
{in: `"g-clef: \uD834\uDD1E"`, ptr: new(string), out: "g-clef: \U0001D11E"},
{in: `"invalid: \uD834x\uDD1E"`, ptr: new(string), out: "invalid: \uFFFDx\uFFFD"},
{in: "null", ptr: new(any), out: nil},
{in: `{"X": [1,2,3], "Y": 4}`, ptr: new(T), out: T{Y: 4}, err: &UnmarshalTypeError{"array", reflect.TypeOf(""), 7, "T", "X"}},
{in: `{"x": 1}`, ptr: new(tx), out: tx{}},
{in: `{"F1":1,"F2":2,"F3":3}`, ptr: new(V), out: V{F1: float64(1), F2: int32(2), F3: Number("3")}},
{in: `{"F1":1,"F2":2,"F3":3}`, ptr: new(V), out: V{F1: Number("1"), F2: int32(2), F3: Number("3")}, useNumber: true},
{in: `{"k1":1,"k2":"s","k3":[1,2.0,3e-3],"k4":{"kk1":"s","kk2":2}}`, ptr: new(any), out: ifaceNumAsFloat64},
{in: `{"k1":1,"k2":"s","k3":[1,2.0,3e-3],"k4":{"kk1":"s","kk2":2}}`, ptr: new(any), out: ifaceNumAsNumber, useNumber: true},
// raw values with whitespace
{in: "\n true ", ptr: new(bool), out: true},
{in: "\t 1 ", ptr: new(int), out: 1},
{in: "\r 1.2 ", ptr: new(float64), out: 1.2},
{in: "\t -5 \n", ptr: new(int16), out: int16(-5)},
{in: "\t \"a\\u1234\" \n", ptr: new(string), out: "a\u1234"},
// Z has a "-" tag.
{in: `{"Y": 1, "Z": 2}`, ptr: new(T), out: T{Y: 1}},
{in: `{"alpha": "abc", "alphabet": "xyz"}`, ptr: new(U), out: U{Alphabet: "abc"}},
{in: `{"alpha": "abc"}`, ptr: new(U), out: U{Alphabet: "abc"}},
{in: `{"alphabet": "xyz"}`, ptr: new(U), out: U{}},
// syntax errors
{in: `{"X": "foo", "Y"}`, err: &SyntaxError{"invalid character '}' after object key", 17}},
{in: `[1, 2, 3+]`, err: &SyntaxError{"invalid character '+' after array element", 9}},
{in: `{"X":12x}`, err: &SyntaxError{"invalid character 'x' after object key:value pair", 8}, useNumber: true},
// raw value errors
{in: "\x01 42", err: &SyntaxError{"invalid character '\\x01' looking for beginning of value", 1}},
{in: " 42 \x01", err: &SyntaxError{"invalid character '\\x01' after top-level value", 5}},
{in: "\x01 true", err: &SyntaxError{"invalid character '\\x01' looking for beginning of value", 1}},
{in: " false \x01", err: &SyntaxError{"invalid character '\\x01' after top-level value", 8}},
{in: "\x01 1.2", err: &SyntaxError{"invalid character '\\x01' looking for beginning of value", 1}},
{in: " 3.4 \x01", err: &SyntaxError{"invalid character '\\x01' after top-level value", 6}},
{in: "\x01 \"string\"", err: &SyntaxError{"invalid character '\\x01' looking for beginning of value", 1}},
{in: " \"string\" \x01", err: &SyntaxError{"invalid character '\\x01' after top-level value", 11}},
// array tests
{in: `[1, 2, 3]`, ptr: new([3]int), out: [3]int{1, 2, 3}},
{in: `[1, 2, 3]`, ptr: new([1]int), out: [1]int{1}},
{in: `[1, 2, 3]`, ptr: new([5]int), out: [5]int{1, 2, 3, 0, 0}},
// empty array to interface test
{in: `[]`, ptr: new([]any), out: []any{}},
{in: `null`, ptr: new([]any), out: []any(nil)},
{in: `{"T":[]}`, ptr: new(map[string]any), out: map[string]any{"T": []any{}}},
{in: `{"T":null}`, ptr: new(map[string]any), out: map[string]any{"T": any(nil)}},
// composite tests
{in: allValueIndent, ptr: new(All), out: allValue},
{in: allValueCompact, ptr: new(All), out: allValue},
{in: allValueIndent, ptr: new(*All), out: &allValue},
{in: allValueCompact, ptr: new(*All), out: &allValue},
{in: pallValueIndent, ptr: new(All), out: pallValue},
{in: pallValueCompact, ptr: new(All), out: pallValue},
{in: pallValueIndent, ptr: new(*All), out: &pallValue},
{in: pallValueCompact, ptr: new(*All), out: &pallValue},
// unmarshal interface test
{in: `{"T":false}`, ptr: &um0, out: umtrue}, // use "false" so test will fail if custom unmarshaler is not called
{in: `{"T":false}`, ptr: &ump, out: &umtrue},
{in: `[{"T":false}]`, ptr: &umslice, out: umslice},
{in: `[{"T":false}]`, ptr: &umslicep, out: &umslice},
{in: `{"M":{"T":"x:y"}}`, ptr: &umstruct, out: umstruct},
// UnmarshalText interface test
{in: `"x:y"`, ptr: &um0T, out: umtrueXY},
{in: `"x:y"`, ptr: &umpType, out: &umtrueXY},
{in: `["x:y"]`, ptr: &umsliceXY, out: umsliceXY},
{in: `["x:y"]`, ptr: &umslicepType, out: &umsliceXY},
{in: `{"M":"x:y"}`, ptr: umstructType, out: umstructXY},
// integer-keyed map test
{
in: `{"-1":"a","0":"b","1":"c"}`,
ptr: new(map[int]string),
out: map[int]string{-1: "a", 0: "b", 1: "c"},
},
{
in: `{"0":"a","10":"c","9":"b"}`,
ptr: new(map[u8]string),
out: map[u8]string{0: "a", 9: "b", 10: "c"},
},
{
in: `{"-9223372036854775808":"min","9223372036854775807":"max"}`,
ptr: new(map[int64]string),
out: map[int64]string{math.MinInt64: "min", math.MaxInt64: "max"},
},
{
in: `{"18446744073709551615":"max"}`,
ptr: new(map[uint64]string),
out: map[uint64]string{math.MaxUint64: "max"},
},
{
in: `{"0":false,"10":true}`,
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}`,
ptr: new(map[u8marshal]int),
out: map[u8marshal]int{2: 4},
},
{
in: `{"2":4}`,
ptr: new(map[u8marshal]int),
err: errMissingU8Prefix,
},
// integer-keyed map errors
{
in: `{"abc":"abc"}`,
ptr: new(map[int]string),
err: &UnmarshalTypeError{Value: "number abc", Type: reflect.TypeOf(0), Offset: 2},
},
{
in: `{"256":"abc"}`,
ptr: new(map[uint8]string),
err: &UnmarshalTypeError{Value: "number 256", Type: reflect.TypeOf(uint8(0)), Offset: 2},
},
{
in: `{"128":"abc"}`,
ptr: new(map[int8]string),
err: &UnmarshalTypeError{Value: "number 128", Type: reflect.TypeOf(int8(0)), Offset: 2},
},
{
in: `{"-1":"abc"}`,
ptr: new(map[uint8]string),
err: &UnmarshalTypeError{Value: "number -1", Type: reflect.TypeOf(uint8(0)), Offset: 2},
},
// Map keys can be encoding.TextUnmarshalers.
{in: `{"x:y":true}`, ptr: &ummapType, out: ummapXY},
// If multiple values for the same key exists, only the most recent value is used.
{in: `{"x:y":false,"x:y":true}`, ptr: &ummapType, out: ummapXY},
// Overwriting of data.
// This is different from package xml, but it's what we've always done.
// Now documented and tested.
{in: `[2]`, ptr: sliceAddr([]int{1}), out: []int{2}},
{in: `{"key": 2}`, ptr: mapAddr(map[string]int{"old": 0, "key": 1}), out: map[string]int{"key": 2}},
{
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}`,
ptr: new(Ambig),
out: Ambig{First: 1},
},
{
in: `{"X": 1,"Y":2}`,
ptr: new(S5),
out: S5{S8: S8{S9: S9{Y: 2}}},
},
{
in: `{"X": 1,"Y":2}`,
ptr: new(S10),
out: S10{S13: S13{S8: S8{S9: S9{Y: 2}}}},
},
// invalid UTF-8 is coerced to valid UTF-8.
{
in: "\"hello\xffworld\"",
ptr: new(string),
out: "hello\ufffdworld",
},
{
in: "\"hello\xc2\xc2world\"",
ptr: new(string),
out: "hello\ufffd\ufffdworld",
},
{
in: "\"hello\xc2\xffworld\"",
ptr: new(string),
out: "hello\ufffd\ufffdworld",
},
{
in: "\"hello\\ud800world\"",
ptr: new(string),
out: "hello\ufffdworld",
},
{
in: "\"hello\\ud800\\ud800world\"",
ptr: new(string),
out: "hello\ufffd\ufffdworld",
},
{
in: "\"hello\\ud800\\ud800world\"",
ptr: new(string),
out: "hello\ufffd\ufffdworld",
},
{
in: "\"hello\xed\xa0\x80\xed\xb0\x80world\"",
ptr: new(string),
out: "hello\ufffd\ufffd\ufffd\ufffd\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"}`,
ptr: &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"}`,
ptr: &map[Point]string{},
err: &UnmarshalTypeError{Value: "object", Type: reflect.TypeOf(map[Point]string{}), Offset: 1},
},
{
in: `{"asdf": "hello world"}`,
ptr: &map[unmarshaler]string{},
err: &UnmarshalTypeError{Value: "object", Type: reflect.TypeOf(map[unmarshaler]string{}), 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"`,
ptr: new([]byteWithMarshalJSON),
out: []byteWithMarshalJSON{1, 2, 3},
},
{
in: `["Z01","Z02","Z03"]`,
ptr: new([]byteWithMarshalJSON),
out: []byteWithMarshalJSON{1, 2, 3},
golden: true,
},
{
in: `"AQID"`,
ptr: new([]byteWithMarshalText),
out: []byteWithMarshalText{1, 2, 3},
},
{
in: `["Z01","Z02","Z03"]`,
ptr: new([]byteWithMarshalText),
out: []byteWithMarshalText{1, 2, 3},
golden: true,
},
{
in: `"AQID"`,
ptr: new([]byteWithPtrMarshalJSON),
out: []byteWithPtrMarshalJSON{1, 2, 3},
},
{
in: `["Z01","Z02","Z03"]`,
ptr: new([]byteWithPtrMarshalJSON),
out: []byteWithPtrMarshalJSON{1, 2, 3},
golden: true,
},
{
in: `"AQID"`,
ptr: new([]byteWithPtrMarshalText),
out: []byteWithPtrMarshalText{1, 2, 3},
},
{
in: `["Z01","Z02","Z03"]`,
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"]`,
ptr: new([]intWithMarshalJSON),
out: []intWithMarshalJSON{1, 2, 3},
golden: true,
},
{
in: `["Z01","Z02","Z03"]`,
ptr: new([]intWithMarshalText),
out: []intWithMarshalText{1, 2, 3},
golden: true,
},
{
in: `["Z01","Z02","Z03"]`,
ptr: new([]intWithPtrMarshalJSON),
out: []intWithPtrMarshalJSON{1, 2, 3},
golden: true,
},
{
in: `["Z01","Z02","Z03"]`,
ptr: new([]intWithPtrMarshalText),
out: []intWithPtrMarshalText{1, 2, 3},
golden: true,
},
{in: `0.000001`, ptr: new(float64), out: 0.000001, golden: true},
{in: `1e-7`, ptr: new(float64), out: 1e-7, golden: true},
{in: `100000000000000000000`, ptr: new(float64), out: 100000000000000000000.0, golden: true},
{in: `1e+21`, ptr: new(float64), out: 1e21, golden: true},
{in: `-0.000001`, ptr: new(float64), out: -0.000001, golden: true},
{in: `-1e-7`, ptr: new(float64), out: -1e-7, golden: true},
{in: `-100000000000000000000`, ptr: new(float64), out: -100000000000000000000.0, golden: true},
{in: `-1e+21`, ptr: new(float64), out: -1e21, golden: true},
{in: `999999999999999900000`, ptr: new(float64), out: 999999999999999900000.0, golden: true},
{in: `9007199254740992`, ptr: new(float64), out: 9007199254740992.0, golden: true},
{in: `9007199254740993`, ptr: new(float64), out: 9007199254740992.0, golden: false},
{
in: `{"V": {"F2": "hello"}}`,
ptr: new(VOuter),
err: &UnmarshalTypeError{
Value: "string",
Struct: "V",
Field: "F2",
Type: reflect.TypeOf(int32(0)),
Offset: 20,
},
},
{
in: `{"V": {"F4": {}, "F2": "hello"}}`,
ptr: new(VOuter),
err: &UnmarshalTypeError{
Value: "string",
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},
{in: `{"B":"false"}`, ptr: new(B), out: B{false}, golden: true},
{in: `{"B": "maybe"}`, ptr: new(B), err: errors.New(`json: invalid use of ,string struct tag, trying to unmarshal "maybe" into bool`)},
{in: `{"B": "tru"}`, ptr: new(B), err: errors.New(`json: invalid use of ,string struct tag, trying to unmarshal "tru" into bool`)},
{in: `{"B": "False"}`, ptr: new(B), err: errors.New(`json: invalid use of ,string struct tag, trying to unmarshal "False" into bool`)},
{in: `{"B": "null"}`, ptr: new(B), out: B{false}},
{in: `{"B": "nul"}`, ptr: new(B), err: errors.New(`json: invalid use of ,string struct tag, trying to unmarshal "nul" into bool`)},
// OrderedObject tests - into any
{in: `{"a":"1","b":2,"c":3}`, ptr: new(any), useOrderedObject: true,
out: OrderedObject{{"a", "1"}, {"b", float64(2)}, {"c", float64(3)}}},
{in: `[{"a":"1","b":2}]`, ptr: new(any), useOrderedObject: true,
out: []any{OrderedObject{{"a", "1"}, {"b", float64(2)}}}},
{in: `{"a":null,"b": {"c":true} }`, ptr: new(any), useOrderedObject: true,
out: OrderedObject{{"a", nil}, {"b", OrderedObject{{"c", true}}}}},
{in: `{"T":[]}`, ptr: new(any), useOrderedObject: true,
out: OrderedObject{{Key: "T", Value: []any{}}}},
{in: `{"T":null}`, ptr: new(any), useOrderedObject: true,
out: OrderedObject{{Key: "T", Value: nil}}},
// OrderedObject tests - into map[string]any
{in: `{"a":"1","b":2,"c":3}`, ptr: new(map[string]any), useOrderedObject: true,
out: map[string]any{"a": "1", "b": float64(2), "c": float64(3)}},
{in: `{"a":null,"b": {"c":true} }`, ptr: new(map[string]any), useOrderedObject: true,
out: map[string]any{"a": nil, "b": OrderedObject{{"c", true}}}},
{in: `{"T":[]}`, ptr: new(map[string]any), useOrderedObject: true,
out: map[string]any{"T": []any{}}},
{in: `{"T":null}`, ptr: new(map[string]any), useOrderedObject: true,
out: map[string]any{"T": nil}},
// OrderedObject tests - into OrderedObject
{in: `{"a":"1","b":2,"c":3}`, ptr: new(OrderedObject), useOrderedObject: true,
out: OrderedObject{{"a", "1"}, {"b", float64(2)}, {"c", float64(3)}}},
{in: `{"a":"1","b":2,"c":3}`, ptr: new(OrderedObject),
out: OrderedObject{{"a", "1"}, {"b", float64(2)}, {"c", float64(3)}}},
{in: `{"a":null,"b": {"c":true} }`, ptr: new(OrderedObject), useOrderedObject: true,
out: OrderedObject{{"a", nil}, {"b", OrderedObject{{"c", true}}}}},
{in: `{"a":null,"b": {"c":true} }`, ptr: new(OrderedObject),
out: OrderedObject{{"a", nil}, {"b", map[string]any{"c": true}}}},
// OrderedObject tests -into []OrderedObject
{in: `[{"a":"1","b":2},{"c":3}]`, ptr: &[]OrderedObject{},
out: []OrderedObject{{{"a", "1"}, {"b", float64(2)}}, {{"c", float64(3)}}}},
}
func TestMarshal(t *testing.T) {
b, err := 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 = 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
}
}
var badUTF8 = []struct {
in, out string
}{
{"hello\xffworld", `"hello\u00FFworld"`},
{"", `""`},
{"\xff", `"\u00FF"`},
{"\xff\xff", `"\u00FF\u00FF"`},
{"a\xffb", `"a\u00FFb"`},
{"\xe6\x97\xa5\xe6\x9c\xac\xff\xaa\x9e", `"\u65E5\u672C\u00FF\u00AA\u009E"`},
}
func TestMarshalBadUTF8(t *testing.T) {
for _, tt := range badUTF8 {
b, err := 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 Number
out, err := 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 := 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 TestUnmarshal(t *testing.T) {
for i, tt := range unmarshalTests {
var scan scanner
in := []byte(tt.in)
if err := checkValid(in, &scan); err != nil {
if !reflect.DeepEqual(err, tt.err) {
t.Errorf("#%d: checkValid: %#v", i, err)
continue
}
}
if tt.ptr == nil {
continue
}
// v = new(right-type)
v := reflect.New(reflect.TypeOf(tt.ptr).Elem())
dec := NewDecoder(bytes.NewReader(in))
if tt.useNumber {
dec.UseNumber()
}
if tt.useOrderedObject {
dec.UseOrderedObject()
}
if err := dec.Decode(v.Interface()); !reflect.DeepEqual(err, tt.err) {
t.Errorf("#%d: %v, want %v", i, err, tt.err)
continue
} else if err != nil {
continue
}
if !reflect.DeepEqual(v.Elem().Interface(), tt.out) {
t.Errorf("#%d: mismatch\nhave: %#+v\nwant: %#+v", i, v.Elem().Interface(), tt.out)
data, _ := Marshal(v.Elem().Interface())
println(string(data))
data, _ = Marshal(tt.out)
println(string(data))
continue
}
// Check round trip also decodes correctly.
if tt.err == nil {
enc, err := Marshal(v.Interface())
if err != nil {
t.Errorf("#%d: error re-marshaling: %v", i, err)
continue
}
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 = NewDecoder(bytes.NewReader(enc))
if tt.useNumber {
dec.UseNumber()
}
if tt.useOrderedObject {
dec.UseOrderedObject()
}
if err := dec.Decode(vv.Interface()); err != nil {
t.Errorf("#%d: error re-unmarshaling %#q: %v", i, enc, err)
continue
}
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)))
continue
}
}
}
}