Golang程序
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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 interface{}
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]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": Number("1"),
"k2": "s",
"k3": []interface{}{Number("1"), Number("2.0"), Number("3e-3")},
"k4": map[string]interface{}{"kk1": "s", "kk2": 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
}
type unmarshalerText struct {
A, B string
}
// 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.IndexByte(b, ':')
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{unmarshalerText{"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{}
}
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 interface{}
out interface{}
err error
useNumber bool
golden bool
disallowUnknownFields 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(interface{}), out: float64(2.0)},
{in: `2`, ptr: new(interface{}), 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(interface{}), 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: `{"x": 1}`, ptr: new(tx), err: fmt.Errorf("json: unknown field \"x\""), disallowUnknownFields: true},
{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(interface{}), out: ifaceNumAsFloat64},
{in: `{"k1":1,"k2":"s","k3":[1,2.0,3e-3],"k4":{"kk1":"s","kk2":2}}`, ptr: new(interface{}), 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: `{"Y": 1, "Z": 2}`, ptr: new(T), err: fmt.Errorf("json: unknown field \"Z\""), disallowUnknownFields: true},
{in: `{"alpha": "abc", "alphabet": "xyz"}`, ptr: new(U), out: U{Alphabet: "abc"}},
{in: `{"alpha": "abc", "alphabet": "xyz"}`, ptr: new(U), err: fmt.Errorf("json: unknown field \"alphabet\""), disallowUnknownFields: true},
{in: `{"alpha": "abc"}`, ptr: new(U), out: U{Alphabet: "abc"}},
{in: `{"alphabet": "xyz"}`, ptr: new(U), out: U{}},
{in: `{"alphabet": "xyz"}`, ptr: new(U), err: fmt.Errorf("json: unknown field \"alphabet\""), disallowUnknownFields: true},
// 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([]interface{}), out: []interface{}{}},
{in: `null`, ptr: new([]interface{}), out: []interface{}(nil)},
{in: `{"T":[]}`, ptr: new(map[string]interface{}), out: map[string]interface{}{"T": []interface{}{}}},
{in: `{"T":null}`, ptr: new(map[string]interface{}), out: map[string]interface{}{"T": interface{}(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(S5),
err: fmt.Errorf("json: unknown field \"X\""),
disallowUnknownFields: true,
},
{
in: `{"X": 1,"Y":2}`,
ptr: new(S10),
out: S10{S13: S13{S8: S8{S9: S9{Y: 2}}}},
},
{
in: `{"X": 1,"Y":2}`,
ptr: new(S10),
err: fmt.Errorf("json: unknown field \"X\""),
disallowUnknownFields: true,
},
// 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`)},
// additional tests for disallowUnknownFields
{
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,
},
{
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,
},
}
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\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 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.disallowUnknownFields {
dec.DisallowUnknownFields()
}
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 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
}
}
}
}
func TestUnmarshalMarshal(t *testing.T) {
initBig()
var v interface{}
if err := Unmarshal(jsonBig, &v); err != nil {
t.Fatalf("Unmarshal: %v", err)
}
b, err := 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 := 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 := Marshal(s0)
if err != nil {
t.Fatalf("Marshal: %v", err)
}
var s1 []byte
if err := 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 := 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 := 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 := 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"}`, `json: invalid use of ,string struct tag, trying to unmarshal "x" into string`},
{`{"result":"foo"}`, `json: invalid use of ,string struct tag, trying to unmarshal "foo" into string`},
{`{"result":"123"}`, `json: invalid use of ,string struct tag, trying to unmarshal "123" into string`},
{`{"result":123}`, `json: invalid use of ,string struct tag, trying to unmarshal unquoted value into string`},
}
// 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 := 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 noSpace(c rune) rune {
if isSpace(byte(c)) { //only used for ascii
return -1
}
return c
}
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)
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 := 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 := 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 := 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 _, tt := range interfaceSetTests {
b := struct{ X interface{} }{tt.pre}
blob := `{"X":` + tt.json + `}`
if err := Unmarshal([]byte(blob), &b); err != nil {
t.Errorf("Unmarshal %#q: %v", blob, err)
continue
}
if !reflect.DeepEqual(b.X, tt.post) {
t.Errorf("Unmarshal %#q into %#v: X=%#v, want %#v", blob, tt.pre, b.X, tt.post)
}
}
}
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 *RawMessage
PTime *time.Time
PBigInt *big.Int
PText *MustNotUnmarshalText
PBuffer *bytes.Buffer // has methods, just not relevant ones
PStruct *struct{}
Raw RawMessage
Time time.Time
BigInt big.Int
Text MustNotUnmarshalText
Buffer bytes.Buffer
Struct struct{}
}
type NullTestStrings struct {
Bool bool `json:",string"`
Int int `json:",string"`
Int8 int8 `json:",string"`
Int16 int16 `json:",string"`
Int32 int32 `json:",string"`
Int64 int64 `json:",string"`
Uint uint `json:",string"`
Uint8 uint8 `json:",string"`
Uint16 uint16 `json:",string"`
Uint32 uint32 `json:",string"`
Uint64 uint64 `json:",string"`
Float32 float32 `json:",string"`
Float64 float64 `json:",string"`
String string `json:",string"`
PBool *bool `json:",string"`
Map map[string]string `json:",string"`
Slice []string `json:",string"`
Interface interface{} `json:",string"`
PRaw *RawMessage `json:",string"`
PTime *time.Time `json:",string"`
PBigInt *big.Int `json:",string"`
PText *MustNotUnmarshalText `json:",string"`
PBuffer *bytes.Buffer `json:",string"`
PStruct *struct{} `json:",string"`
Raw RawMessage `json:",string"`
Time time.Time `json:",string"`
BigInt big.Int `json:",string"`
Text MustNotUnmarshalText `json:",string"`
Buffer bytes.Buffer `json:",string"`
Struct struct{} `json:",string"`
}
// 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(RawMessage),
PTime: new(time.Time),
PBigInt: new(big.Int),
PText: new(MustNotUnmarshalText),
PStruct: new(struct{}),
PBuffer: new(bytes.Buffer),
Raw: RawMessage("123"),
Time: time.Unix(123456789, 0),
BigInt: *big.NewInt(123),
}
before := nulls.Time.String()
err := 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())
}
}
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 TestStringKind(t *testing.T) {
type stringKind string
var m1, m2 map[stringKind]int
m1 = map[stringKind]int{
"foo": 42,
}
data, err := Marshal(m1)
if err != nil {
t.Errorf("Unexpected error marshaling: %v", err)
}
err = 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 := Marshal(a)
if err != nil {
t.Error(err)
}
var b byteKind
err = 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 := Marshal(a)
if err != nil {
t.Fatal(err)
}
var b []Uint8
err = 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 := Unmarshal([]byte(item.src), item.dest)
if _, ok := err.(*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 := Unmarshal([]byte(src), &x)
if _, ok := err.(*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"`
}
func TestUnmarshalUnexported(t *testing.T) {
input := `{"Name": "Bob", "m": {"x": 123}, "m2": {"y": 456}, "abcd": {"z": 789}}`
want := &unexportedFields{Name: "Bob"}
out := &unexportedFields{}
err := 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 := 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) {
json := `[{}]`
var dest [0]interface{}
err := Unmarshal([]byte(json), &dest)
if err != nil {
t.Errorf("got error %q, want nil", err)
}
}
// Test semantics of pre-filled struct fields and pre-filled map fields.
// Issue 4900.
func TestPrefilled(t *testing.T) {
ptrToMap := func(m map[string]interface{}) *map[string]interface{} { return &m }
// 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: ptrToMap(map[string]interface{}{"X": float32(3), "Y": int16(4), "Z": 1.5}),
out: ptrToMap(map[string]interface{}{"X": float64(1), "Y": float64(2), "Z": 1.5}),
},
}
for _, tt := range prefillTests {
ptrstr := fmt.Sprintf("%v", tt.ptr)
err := 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 := 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 := 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 := Marshal(item)
if err != nil {
t.Fatalf("Marshal: %v", err)
}
err = Unmarshal(data, &item)
if err != nil {
t.Fatalf("Unmarshal: %v", err)
}
}
// Test unmarshal behavior with regards to embedded pointers to unexported structs.
// If unallocated, this returns an error because unmarshal cannot set the field.
// Issue 21357.
func TestUnmarshalEmbeddedPointerUnexported(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
}
)
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.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.embed3"),
}}
for i, tt := range tests {
err := Unmarshal([]byte(tt.in), tt.ptr)
if !reflect.DeepEqual(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)
}
}
}