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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 (
type U struct {
Alphabet string `json:"alpha"`
}
type V struct {
F1 interface{}
F2 int32
F3 Number
}
// ifaceNumAsFloat64/ifaceNumAsNumber are used to test unmarshalling 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")},
}
// 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
}
var (
um0, um1 unmarshaler // target2 of unmarshaling
ump = &um1
umtrue = unmarshaler{true}
umslicep = new([]unmarshaler)
umstruct = ustruct{unmarshaler{true}}
in string
ptr interface{}
out interface{}
err error
useNumber bool
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("")}},
{in: `{"x": 1}`, ptr: new(tx), out: tx{}, err: &UnmarshalFieldError{"x", txType, txType.Field(0)}},
{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},
{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{}},
{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},
// 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}},
{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":false}}`, ptr: &umstruct, out: umstruct},
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
}
func TestMarshalBadUTF8(t *testing.T) {
s := "hello\xffworld"
b, err := Marshal(s)
if err == nil {
t.Fatal("Marshal bad UTF8: no error")
}
if len(b) != 0 {
t.Fatal("Marshal returned data")
}
if _, ok := err.(*InvalidUTF8Error); !ok {
t.Fatalf("Marshal did not return InvalidUTF8Error: %T %v", err, err)
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 TestUnmarshal(t *testing.T) {
for i, tt := range unmarshalTests {
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)
dec := NewDecoder(bytes.NewBuffer(in))
if tt.useNumber {
dec.UseNumber()
}
if err := dec.Decode(v.Interface()); !reflect.DeepEqual(err, tt.err) {
t.Errorf("#%d: %v want %v", i, err, tt.err)
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.
if tt.err == nil {
enc, err := Marshal(v.Interface())
if err != nil {
t.Errorf("#%d: error re-marshaling: %v", i, err)
continue
}
vv := reflect.New(reflect.TypeOf(tt.ptr).Elem())
dec = NewDecoder(bytes.NewBuffer(enc))
if tt.useNumber {
dec.UseNumber()
}
if err := dec.Decode(vv.Interface()); err != nil {
t.Errorf("#%d: error re-unmarshaling: %v", i, 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())
continue
}
}
func TestUnmarshalMarshal(t *testing.T) {
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.Compare(jsonBig, b) != 0 {
t.Errorf("Marshal jsonBig")
diff(t, b, jsonBig)
return
}
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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.Compare(s0, s1) != 0 {
t.Errorf("Marshal large byte slice")
diff(t, s0, s1)
}
}
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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>`
const expected = `"\"foobar\"\u003chtml\u003e"`
b, err := Marshal(input)
if err != nil {
t.Fatalf("Marshal error: %v", err)
}
if s := string(b); s != expected {
t.Errorf("Encoding of [%s] was [%s], want [%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`},
}
// 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)
}
}
}
if isSpace(c) {
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"`
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{}
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",
String: "16",
Map: map[string]Small{
"20": nil,
},
EmptyMap: map[string]Small{},
EmptySlice: []Small{},
StringSlice: []string{"str24", "str25", "str26"},
ByteSlice: []byte{27, 28, 29},
Small: Small{Tag: "tag30"},
PSmall: &Small{Tag: "tag31"},
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,
"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,
"bar2": "foo2",
"IntStr": "42",
"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": {
"PMap": null,
"PMapP": null,
"EmptyMap": {},
"NilMap": null,
"Slice": [
"PSlice": null,
"PSliceP": null,
"EmptySlice": [],
"str24",
"str25",
"str26"
],
"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,
"bar2": "",
"IntStr": "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": {
"EmptyMap": null,
"NilMap": null,
"EmptySlice": null,
"NilSlice": null,
"StringSlice": null,
"ByteSlice": null,
"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
}
want := S{
R0: 12,
R1: new(Ref),
}
*want.R1 = 12
var got S
if err := Unmarshal([]byte(`{"R0":"ref","R1":"ref"}`), &got); err != nil {
t.Fatalf("Unmarshal: %v", err)
}
if !reflect.DeepEqual(got, want) {
t.Errorf("got %+v, want %+v", got, want)
}
}
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// Test that anonymous fields are ignored.
// We may assign meaning to them later.
func TestAnonymous(t *testing.T) {
type S struct {
T
N int
}
data, err := Marshal(new(S))
if err != nil {
t.Fatalf("Marshal: %v", err)
}
want := `{"N":0}`
if string(data) != want {
t.Fatalf("Marshal = %#q, want %#q", string(data), want)
}
var s S
if err := Unmarshal([]byte(`{"T": 1, "T": {"Y": 1}, "N": 2}`), &s); err != nil {
t.Fatalf("Unmarshal: %v", err)
}
if s.N != 2 {
t.Fatal("Unmarshal: did not set N")
}
if s.T.Y != 0 {
t.Fatal("Unmarshal: did set T.Y")
}
}
Michael Chaten
committed
// 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")
}
}
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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)
}
}
}