// Copyright 2011 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"
"fmt"
"log"
"math"
"reflect"
"regexp"
"strconv"
"testing"
"unicode"
)
type Optionals struct {
Sr string `json:"sr"`
So string `json:"so,omitempty"`
Sw string `json:"-"`
Ir int `json:"omitempty"` // actually named omitempty, not an option
Io int `json:"io,omitempty"`
Slr []string `json:"slr,random"`
Slo []string `json:"slo,omitempty"`
Mr map[string]interface{} `json:"mr"`
Mo map[string]interface{} `json:",omitempty"`
Fr float64 `json:"fr"`
Fo float64 `json:"fo,omitempty"`
Br bool `json:"br"`
Bo bool `json:"bo,omitempty"`
Ur uint `json:"ur"`
Uo uint `json:"uo,omitempty"`
Str struct{} `json:"str"`
Sto struct{} `json:"sto,omitempty"`
}
var optionalsExpected = `{
"sr": "",
"omitempty": 0,
"slr": null,
"mr": {},
"fr": 0,
"br": false,
"ur": 0,
"str": {},
"sto": {}
}`
func TestOmitEmpty(t *testing.T) {
var o Optionals
o.Sw = "something"
o.Mr = map[string]interface{}{}
o.Mo = map[string]interface{}{}
got, err := MarshalIndent(&o, "", " ")
if err != nil {
t.Fatal(err)
}
if got := string(got); got != optionalsExpected {
t.Errorf(" got: %s\nwant: %s\n", got, optionalsExpected)
}
}
type StringTag struct {
BoolStr bool `json:",string"`
IntStr int64 `json:",string"`
UintptrStr uintptr `json:",string"`
StrStr string `json:",string"`
}
var stringTagExpected = `{
"BoolStr": "true",
"IntStr": "42",
"UintptrStr": "44",
"StrStr": "\"xzbit\""
}`
func TestStringTag(t *testing.T) {
var s StringTag
s.BoolStr = true
s.IntStr = 42
s.UintptrStr = 44
s.StrStr = "xzbit"
got, err := MarshalIndent(&s, "", " ")
if err != nil {
t.Fatal(err)
}
if got := string(got); got != stringTagExpected {
t.Fatalf(" got: %s\nwant: %s\n", got, stringTagExpected)
}
// Verify that it round-trips.
var s2 StringTag
err = NewDecoder(bytes.NewReader(got)).Decode(&s2)
if err != nil {
t.Fatalf("Decode: %v", err)
}
if !reflect.DeepEqual(s, s2) {
t.Fatalf("decode didn't match.\nsource: %#v\nEncoded as:\n%s\ndecode: %#v", s, string(got), s2)
}
}
// byte slices are special even if they're renamed types.
type renamedByte byte
type renamedByteSlice []byte
type renamedRenamedByteSlice []renamedByte
func TestEncodeRenamedByteSlice(t *testing.T) {
s := renamedByteSlice("abc")
result, err := Marshal(s)
if err != nil {
t.Fatal(err)
}
expect := `"YWJj"`
if string(result) != expect {
t.Errorf(" got %s want %s", result, expect)
}
r := renamedRenamedByteSlice("abc")
result, err = Marshal(r)
if err != nil {
t.Fatal(err)
}
if string(result) != expect {
t.Errorf(" got %s want %s", result, expect)
}
}
var unsupportedValues = []interface{}{
math.NaN(),
math.Inf(-1),
math.Inf(1),
}
func TestUnsupportedValues(t *testing.T) {
for _, v := range unsupportedValues {
if _, err := Marshal(v); err != nil {
if _, ok := err.(*UnsupportedValueError); !ok {
t.Errorf("for %v, got %T want UnsupportedValueError", v, err)
}
} else {
t.Errorf("for %v, expected error", v)
}
}
}
// Ref has Marshaler and Unmarshaler methods with pointer receiver.
type Ref int
func (*Ref) MarshalJSON() ([]byte, error) {
return []byte(`"ref"`), nil
}
func (r *Ref) UnmarshalJSON([]byte) error {
*r = 12
return nil
}
// Val has Marshaler methods with value receiver.
type Val int
func (Val) MarshalJSON() ([]byte, error) {
return []byte(`"val"`), nil
}
// RefText has Marshaler and Unmarshaler methods with pointer receiver.
type RefText int
func (*RefText) MarshalText() ([]byte, error) {
return []byte(`"ref"`), nil
}
func (r *RefText) UnmarshalText([]byte) error {
*r = 13
return nil
}
// ValText has Marshaler methods with value receiver.
type ValText int
func (ValText) MarshalText() ([]byte, error) {
return []byte(`"val"`), nil
}
func TestRefValMarshal(t *testing.T) {
var s = struct {
R0 Ref
R1 *Ref
R2 RefText
R3 *RefText
V0 Val
V1 *Val
V2 ValText
V3 *ValText
}{
R0: 12,
R1: new(Ref),
R2: 14,
R3: new(RefText),
V0: 13,
V1: new(Val),
V2: 15,
V3: new(ValText),
}
const want = `{"R0":"ref","R1":"ref","R2":"\"ref\"","R3":"\"ref\"","V0":"val","V1":"val","V2":"\"val\"","V3":"\"val\""}`
b, err := Marshal(&s)
if err != nil {
t.Fatalf("Marshal: %v", err)
}
if got := string(b); got != want {
t.Errorf("got %q, want %q", got, want)
}
}
// C implements Marshaler and returns unescaped JSON.
type C int
func (C) MarshalJSON() ([]byte, error) {
return []byte(`"<&>"`), nil
}
// CText implements Marshaler and returns unescaped text.
type CText int
func (CText) MarshalText() ([]byte, error) {
return []byte(`"<&>"`), nil
}
func TestMarshalerEscaping(t *testing.T) {
var c C
want := `"\u003c\u0026\u003e"`
b, err := Marshal(c)
if err != nil {
t.Fatalf("Marshal(c): %v", err)
}
if got := string(b); got != want {
t.Errorf("Marshal(c) = %#q, want %#q", got, want)
}
var ct CText
want = `"\"\u003c\u0026\u003e\""`
b, err = Marshal(ct)
if err != nil {
t.Fatalf("Marshal(ct): %v", err)
}
if got := string(b); got != want {
t.Errorf("Marshal(ct) = %#q, want %#q", got, want)
}
}
func TestAnonymousFields(t *testing.T) {
tests := []struct {
label string // Test name
makeInput func() interface{} // Function to create input value
want string // Expected JSON output
}{{
// Both S1 and S2 have a field named X. From the perspective of S,
// it is ambiguous which one X refers to.
// This should not serialize either field.
label: "AmbiguousField",
makeInput: func() interface{} {
type (
S1 struct{ x, X int }
S2 struct{ x, X int }
S struct {
S1
S2
}
)
return S{S1{1, 2}, S2{3, 4}}
},
want: `{}`,
}, {
label: "DominantField",
// Both S1 and S2 have a field named X, but since S has an X field as
// well, it takes precedence over S1.X and S2.X.
makeInput: func() interface{} {
type (
S1 struct{ x, X int }
S2 struct{ x, X int }
S struct {
S1
S2
x, X int
}
)
return S{S1{1, 2}, S2{3, 4}, 5, 6}
},
want: `{"X":6}`,
}, {
// Unexported embedded field of non-struct type should not be serialized.
label: "UnexportedEmbeddedInt",
makeInput: func() interface{} {
type (
myInt int
S struct{ myInt }
)
return S{5}
},
want: `{}`,
}, {
// Exported embedded field of non-struct type should be serialized.
label: "ExportedEmbeddedInt",
makeInput: func() interface{} {
type (
MyInt int
S struct{ MyInt }
)
return S{5}
},
want: `{"MyInt":5}`,
}, {
// Unexported embedded field of pointer to non-struct type
// should not be serialized.
label: "UnexportedEmbeddedIntPointer",
makeInput: func() interface{} {
type (
myInt int
S struct{ *myInt }
)
s := S{new(myInt)}
*s.myInt = 5
return s
},
want: `{}`,
}, {
// Exported embedded field of pointer to non-struct type
// should be serialized.
label: "ExportedEmbeddedIntPointer",
makeInput: func() interface{} {
type (
MyInt int
S struct{ *MyInt }
)
s := S{new(MyInt)}
*s.MyInt = 5
return s
},
want: `{"MyInt":5}`,
}, {
// Exported fields of embedded structs should have their
// exported fields be serialized regardless of whether the struct types
// themselves are exported.
label: "EmbeddedStruct",
makeInput: func() interface{} {
type (
s1 struct{ x, X int }
S2 struct{ y, Y int }
S struct {
s1
S2
}
)
return S{s1{1, 2}, S2{3, 4}}
},
want: `{"X":2,"Y":4}`,
}, {
// Exported fields of pointers to embedded structs should have their
// exported fields be serialized regardless of whether the struct types
// themselves are exported.
label: "EmbeddedStructPointer",
makeInput: func() interface{} {
type (
s1 struct{ x, X int }
S2 struct{ y, Y int }
S struct {
*s1
*S2
}
)
return S{&s1{1, 2}, &S2{3, 4}}
},
want: `{"X":2,"Y":4}`,
}, {
// Exported fields on embedded unexported structs at multiple levels
// of nesting should still be serialized.
label: "NestedStructAndInts",
makeInput: func() interface{} {
type (
MyInt1 int
MyInt2 int
myInt int
s2 struct {
MyInt2
myInt
}
s1 struct {
MyInt1
myInt
s2
}
S struct {
s1
myInt
}
)
return S{s1{1, 2, s2{3, 4}}, 6}
},
want: `{"MyInt1":1,"MyInt2":3}`,
}, {
// If an anonymous struct pointer field is nil, we should ignore
// the embedded fields behind it. Not properly doing so may
// result in the wrong output or reflect panics.
label: "EmbeddedFieldBehindNilPointer",
makeInput: func() interface{} {
type (
S2 struct{ Field string }
S struct{ *S2 }
)
return S{}
},
want: `{}`,
}}
for _, tt := range tests {
t.Run(tt.label, func(t *testing.T) {
b, err := Marshal(tt.makeInput())
if err != nil {
t.Fatalf("Marshal() = %v, want nil error", err)
}
if string(b) != tt.want {
t.Fatalf("Marshal() = %q, want %q", b, tt.want)
}
})
}
}
type BugA struct {
S string
}
type BugB struct {
BugA
S string
}
type BugC struct {
S string
}
// Legal Go: We never use the repeated embedded field (S).
type BugX struct {
A int
BugA
BugB
}
// Issue 16042. Even if a nil interface value is passed in
// as long as it implements MarshalJSON, it should be marshaled.
type nilMarshaler string
func (nm *nilMarshaler) MarshalJSON() ([]byte, error) {
if nm == nil {
return Marshal("0zenil0")
}
return Marshal("zenil:" + string(*nm))
}
// Issue 16042.
func TestNilMarshal(t *testing.T) {
testCases := []struct {
v interface{}
want string
}{
{v: nil, want: `null`},
{v: new(float64), want: `0`},
{v: []interface{}(nil), want: `null`},
{v: []string(nil), want: `null`},
{v: map[string]string(nil), want: `null`},
{v: []byte(nil), want: `null`},
{v: struct{ M string }{"gopher"}, want: `{"M":"gopher"}`},
{v: struct{ M Marshaler }{}, want: `{"M":null}`},
{v: struct{ M Marshaler }{(*nilMarshaler)(nil)}, want: `{"M":"0zenil0"}`},
{v: struct{ M interface{} }{(*nilMarshaler)(nil)}, want: `{"M":null}`},
}
for _, tt := range testCases {
out, err := Marshal(tt.v)
if err != nil || string(out) != tt.want {
t.Errorf("Marshal(%#v) = %#q, %#v, want %#q, nil", tt.v, out, err, tt.want)
continue
}
}
}
// Issue 5245.
func TestEmbeddedBug(t *testing.T) {
v := BugB{
BugA{"A"},
"B",
}
b, err := Marshal(v)
if err != nil {
t.Fatal("Marshal:", err)
}
want := `{"S":"B"}`
got := string(b)
if got != want {
t.Fatalf("Marshal: got %s want %s", got, want)
}
// Now check that the duplicate field, S, does not appear.
x := BugX{
A: 23,
}
b, err = Marshal(x)
if err != nil {
t.Fatal("Marshal:", err)
}
want = `{"A":23}`
got = string(b)
if got != want {
t.Fatalf("Marshal: got %s want %s", got, want)
}
}
type BugD struct { // Same as BugA after tagging.
XXX string `json:"S"`
}
// BugD's tagged S field should dominate BugA's.
type BugY struct {
BugA
BugD
}
// Test that a field with a tag dominates untagged fields.
func TestTaggedFieldDominates(t *testing.T) {
v := BugY{
BugA{"BugA"},
BugD{"BugD"},
}
b, err := Marshal(v)
if err != nil {
t.Fatal("Marshal:", err)
}
want := `{"S":"BugD"}`
got := string(b)
if got != want {
t.Fatalf("Marshal: got %s want %s", got, want)
}
}
// There are no tags here, so S should not appear.
type BugZ struct {
BugA
BugC
BugY // Contains a tagged S field through BugD; should not dominate.
}
func TestDuplicatedFieldDisappears(t *testing.T) {
v := BugZ{
BugA{"BugA"},
BugC{"BugC"},
BugY{
BugA{"nested BugA"},
BugD{"nested BugD"},
},
}
b, err := Marshal(v)
if err != nil {
t.Fatal("Marshal:", err)
}
want := `{}`
got := string(b)
if got != want {
t.Fatalf("Marshal: got %s want %s", got, want)
}
}
func TestStringBytes(t *testing.T) {
t.Parallel()
// Test that encodeState.stringBytes and encodeState.string use the same encoding.
var r []rune
for i := '\u0000'; i <= unicode.MaxRune; i++ {
r = append(r, i)
}
s := string(r) + "\xff\xff\xffhello" // some invalid UTF-8 too
for _, escapeHTML := range []bool{true, false} {
es := &encodeState{}
es.string(s, escapeHTML)
esBytes := &encodeState{}
esBytes.stringBytes([]byte(s), escapeHTML)
enc := es.Buffer.String()
encBytes := esBytes.Buffer.String()
if enc != encBytes {
i := 0
for i < len(enc) && i < len(encBytes) && enc[i] == encBytes[i] {
i++
}
enc = enc[i:]
encBytes = encBytes[i:]
i = 0
for i < len(enc) && i < len(encBytes) && enc[len(enc)-i-1] == encBytes[len(encBytes)-i-1] {
i++
}
enc = enc[:len(enc)-i]
encBytes = encBytes[:len(encBytes)-i]
if len(enc) > 20 {
enc = enc[:20] + "..."
}
if len(encBytes) > 20 {
encBytes = encBytes[:20] + "..."
}
t.Errorf("with escapeHTML=%t, encodings differ at %#q vs %#q",
escapeHTML, enc, encBytes)
}
}
}
func TestIssue10281(t *testing.T) {
type Foo struct {
N Number
}
x := Foo{Number(`invalid`)}
b, err := Marshal(&x)
if err == nil {
t.Errorf("Marshal(&x) = %#q; want error", b)
}
}
func TestHTMLEscape(t *testing.T) {
var b, want bytes.Buffer
m := `{"M":"<html>foo &` + "\xe2\x80\xa8 \xe2\x80\xa9" + `</html>"}`
want.Write([]byte(`{"M":"\u003chtml\u003efoo \u0026\u2028 \u2029\u003c/html\u003e"}`))
HTMLEscape(&b, []byte(m))
if !bytes.Equal(b.Bytes(), want.Bytes()) {
t.Errorf("HTMLEscape(&b, []byte(m)) = %s; want %s", b.Bytes(), want.Bytes())
}
}
// golang.org/issue/8582
func TestEncodePointerString(t *testing.T) {
type stringPointer struct {
N *int64 `json:"n,string"`
}
var n int64 = 42
b, err := Marshal(stringPointer{N: &n})
if err != nil {
t.Fatalf("Marshal: %v", err)
}
if got, want := string(b), `{"n":"42"}`; got != want {
t.Errorf("Marshal = %s, want %s", got, want)
}
var back stringPointer
err = Unmarshal(b, &back)
if err != nil {
t.Fatalf("Unmarshal: %v", err)
}
if back.N == nil {
t.Fatalf("Unmarshaled nil N field")
}
if *back.N != 42 {
t.Fatalf("*N = %d; want 42", *back.N)
}
}
var encodeStringTests = []struct {
in string
out string
}{
{"\x00", `"\u0000"`},
{"\x01", `"\u0001"`},
{"\x02", `"\u0002"`},
{"\x03", `"\u0003"`},
{"\x04", `"\u0004"`},
{"\x05", `"\u0005"`},
{"\x06", `"\u0006"`},
{"\x07", `"\u0007"`},
{"\x08", `"\u0008"`},
{"\x09", `"\t"`},
{"\x0a", `"\n"`},
{"\x0b", `"\u000b"`},
{"\x0c", `"\u000c"`},
{"\x0d", `"\r"`},
{"\x0e", `"\u000e"`},
{"\x0f", `"\u000f"`},
{"\x10", `"\u0010"`},
{"\x11", `"\u0011"`},
{"\x12", `"\u0012"`},
{"\x13", `"\u0013"`},
{"\x14", `"\u0014"`},
{"\x15", `"\u0015"`},
{"\x16", `"\u0016"`},
{"\x17", `"\u0017"`},
{"\x18", `"\u0018"`},
{"\x19", `"\u0019"`},
{"\x1a", `"\u001a"`},
{"\x1b", `"\u001b"`},
{"\x1c", `"\u001c"`},
{"\x1d", `"\u001d"`},
{"\x1e", `"\u001e"`},
{"\x1f", `"\u001f"`},
}
func TestEncodeString(t *testing.T) {
for _, tt := range encodeStringTests {
b, err := Marshal(tt.in)
if err != nil {
t.Errorf("Marshal(%q): %v", tt.in, err)
continue
}
out := string(b)
if out != tt.out {
t.Errorf("Marshal(%q) = %#q, want %#q", tt.in, out, tt.out)
}
}
}
type jsonbyte byte
func (b jsonbyte) MarshalJSON() ([]byte, error) { return tenc(`{"JB":%d}`, b) }
type textbyte byte
func (b textbyte) MarshalText() ([]byte, error) { return tenc(`TB:%d`, b) }
type jsonint int
func (i jsonint) MarshalJSON() ([]byte, error) { return tenc(`{"JI":%d}`, i) }
type textint int
func (i textint) MarshalText() ([]byte, error) { return tenc(`TI:%d`, i) }
func tenc(format string, a ...interface{}) ([]byte, error) {
var buf bytes.Buffer
fmt.Fprintf(&buf, format, a...)
return buf.Bytes(), nil
}
// Issue 13783
func TestEncodeBytekind(t *testing.T) {
testdata := []struct {
data interface{}
want string
}{
{byte(7), "7"},
{jsonbyte(7), `{"JB":7}`},
{textbyte(4), `"TB:4"`},
{jsonint(5), `{"JI":5}`},
{textint(1), `"TI:1"`},
{[]byte{0, 1}, `"AAE="`},
{[]jsonbyte{0, 1}, `[{"JB":0},{"JB":1}]`},
{[][]jsonbyte{{0, 1}, {3}}, `[[{"JB":0},{"JB":1}],[{"JB":3}]]`},
{[]textbyte{2, 3}, `["TB:2","TB:3"]`},
{[]jsonint{5, 4}, `[{"JI":5},{"JI":4}]`},
{[]textint{9, 3}, `["TI:9","TI:3"]`},
{[]int{9, 3}, `[9,3]`},
}
for _, d := range testdata {
js, err := Marshal(d.data)
if err != nil {
t.Error(err)
continue
}
got, want := string(js), d.want
if got != want {
t.Errorf("got %s, want %s", got, want)
}
}
}
func TestTextMarshalerMapKeysAreSorted(t *testing.T) {
b, err := Marshal(map[unmarshalerText]int{
{"x", "y"}: 1,
{"y", "x"}: 2,
{"a", "z"}: 3,
{"z", "a"}: 4,
})
if err != nil {
t.Fatalf("Failed to Marshal text.Marshaler: %v", err)
}
const want = `{"a:z":3,"x:y":1,"y:x":2,"z:a":4}`
if string(b) != want {
t.Errorf("Marshal map with text.Marshaler keys: got %#q, want %#q", b, want)
}
}
var re = regexp.MustCompile
// syntactic checks on form of marshaled floating point numbers.
var badFloatREs = []*regexp.Regexp{
re(`p`), // no binary exponential notation
re(`^\+`), // no leading + sign
re(`^-?0[^.]`), // no unnecessary leading zeros
re(`^-?\.`), // leading zero required before decimal point
re(`\.(e|$)`), // no trailing decimal
re(`\.[0-9]+0(e|$)`), // no trailing zero in fraction
re(`^-?(0|[0-9]{2,})\..*e`), // exponential notation must have normalized mantissa
re(`e[0-9]`), // positive exponent must be signed
re(`e[+-]0`), // exponent must not have leading zeros
re(`e-[1-6]$`), // not tiny enough for exponential notation
re(`e+(.|1.|20)$`), // not big enough for exponential notation
re(`^-?0\.0000000`), // too tiny, should use exponential notation
re(`^-?[0-9]{22}`), // too big, should use exponential notation
re(`[1-9][0-9]{16}[1-9]`), // too many significant digits in integer
re(`[1-9][0-9.]{17}[1-9]`), // too many significant digits in decimal
// below here for float32 only
re(`[1-9][0-9]{8}[1-9]`), // too many significant digits in integer
re(`[1-9][0-9.]{9}[1-9]`), // too many significant digits in decimal
}
func TestMarshalFloat(t *testing.T) {
t.Parallel()
nfail := 0
test := func(f float64, bits int) {
vf := interface{}(f)
if bits == 32 {
f = float64(float32(f)) // round
vf = float32(f)
}
bout, err := Marshal(vf)
if err != nil {
t.Errorf("Marshal(%T(%g)): %v", vf, vf, err)
nfail++
return
}
out := string(bout)
// result must convert back to the same float
g, err := strconv.ParseFloat(out, bits)
if err != nil {
t.Errorf("Marshal(%T(%g)) = %q, cannot parse back: %v", vf, vf, out, err)
nfail++
return
}
if f != g || fmt.Sprint(f) != fmt.Sprint(g) { // fmt.Sprint handles ±0
t.Errorf("Marshal(%T(%g)) = %q (is %g, not %g)", vf, vf, out, float32(g), vf)
nfail++
return
}
bad := badFloatREs
if bits == 64 {
bad = bad[:len(bad)-2]
}
for _, re := range bad {
if re.MatchString(out) {
t.Errorf("Marshal(%T(%g)) = %q, must not match /%s/", vf, vf, out, re)
nfail++
return
}
}
}
var (
bigger = math.Inf(+1)
smaller = math.Inf(-1)
)
var digits = "1.2345678901234567890123"
for i := len(digits); i >= 2; i-- {
for exp := -30; exp <= 30; exp++ {
for _, sign := range "+-" {
for bits := 32; bits <= 64; bits += 32 {
s := fmt.Sprintf("%c%se%d", sign, digits[:i], exp)
f, err := strconv.ParseFloat(s, bits)
if err != nil {
log.Fatal(err)
}
next := math.Nextafter
if bits == 32 {
next = func(g, h float64) float64 {
return float64(math.Nextafter32(float32(g), float32(h)))
}
}
test(f, bits)
test(next(f, bigger), bits)
test(next(f, smaller), bits)
if nfail > 50 {
t.Fatalf("stopping test early")
}
}
}
}
}
test(0, 64)
test(math.Copysign(0, -1), 64)
test(0, 32)
test(math.Copysign(0, -1), 32)
}
func TestMarshalRawMessageValue(t *testing.T) {
type (
T1 struct {
M RawMessage `json:",omitempty"`
}
T2 struct {
M *RawMessage `json:",omitempty"`
}
)
var (
rawNil = RawMessage(nil)
rawEmpty = RawMessage([]byte{})
rawText = RawMessage([]byte(`"foo"`))
)
tests := []struct {
in interface{}
want string
ok bool
}{
// Test with nil RawMessage.
{rawNil, "null", true},
{&rawNil, "null", true},
{[]interface{}{rawNil}, "[null]", true},
{&[]interface{}{rawNil}, "[null]", true},
{[]interface{}{&rawNil}, "[null]", true},
{&[]interface{}{&rawNil}, "[null]", true},
{struct{ M RawMessage }{rawNil}, `{"M":null}`, true},
{&struct{ M RawMessage }{rawNil}, `{"M":null}`, true},
{struct{ M *RawMessage }{&rawNil}, `{"M":null}`, true},
{&struct{ M *RawMessage }{&rawNil}, `{"M":null}`, true},
{map[string]interface{}{"M": rawNil}, `{"M":null}`, true},
{&map[string]interface{}{"M": rawNil}, `{"M":null}`, true},
{map[string]interface{}{"M": &rawNil}, `{"M":null}`, true},
{&map[string]interface{}{"M": &rawNil}, `{"M":null}`, true},
{T1{rawNil}, "{}", true},
{T2{&rawNil}, `{"M":null}`, true},
{&T1{rawNil}, "{}", true},
{&T2{&rawNil}, `{"M":null}`, true},
// Test with empty, but non-nil, RawMessage.
{rawEmpty, "", false},
{&rawEmpty, "", false},
{[]interface{}{rawEmpty}, "", false},
{&[]interface{}{rawEmpty}, "", false},
{[]interface{}{&rawEmpty}, "", false},
{&[]interface{}{&rawEmpty}, "", false},
{struct{ X RawMessage }{rawEmpty}, "", false},
{&struct{ X RawMessage }{rawEmpty}, "", false},
{struct{ X *RawMessage }{&rawEmpty}, "", false},
{&struct{ X *RawMessage }{&rawEmpty}, "", false},
{map[string]interface{}{"nil": rawEmpty}, "", false},
{&map[string]interface{}{"nil": rawEmpty}, "", false},
{map[string]interface{}{"nil": &rawEmpty}, "", false},
{&map[string]interface{}{"nil": &rawEmpty}, "", false},
{T1{rawEmpty}, "{}", true},
{T2{&rawEmpty}, "", false},
{&T1{rawEmpty}, "{}", true},
{&T2{&rawEmpty}, "", false},
// Test with RawMessage with some text.
//
// The tests below marked with Issue6458 used to generate "ImZvbyI=" instead "foo".
// This behavior was intentionally changed in Go 1.8.
// See https://golang.org/issues/14493#issuecomment-255857318
{rawText, `"foo"`, true}, // Issue6458
{&rawText, `"foo"`, true},
{[]interface{}{rawText}, `["foo"]`, true}, // Issue6458
{&[]interface{}{rawText}, `["foo"]`, true}, // Issue6458
{[]interface{}{&rawText}, `["foo"]`, true},
{&[]interface{}{&rawText}, `["foo"]`, true},
{struct{ M RawMessage }{rawText}, `{"M":"foo"}`, true}, // Issue6458
{&struct{ M RawMessage }{rawText}, `{"M":"foo"}`, true},
{struct{ M *RawMessage }{&rawText}, `{"M":"foo"}`, true},
{&struct{ M *RawMessage }{&rawText}, `{"M":"foo"}`, true},
{map[string]interface{}{"M": rawText}, `{"M":"foo"}`, true}, // Issue6458
{&map[string]interface{}{"M": rawText}, `{"M":"foo"}`, true}, // Issue6458
{map[string]interface{}{"M": &rawText}, `{"M":"foo"}`, true},
{&map[string]interface{}{"M": &rawText}, `{"M":"foo"}`, true},
{T1{rawText}, `{"M":"foo"}`, true}, // Issue6458
{T2{&rawText}, `{"M":"foo"}`, true},
{&T1{rawText}, `{"M":"foo"}`, true},
{&T2{&rawText}, `{"M":"foo"}`, true},
}
for i, tt := range tests {
b, err := Marshal(tt.in)
if ok := (err == nil); ok != tt.ok {
if err != nil {
t.Errorf("test %d, unexpected failure: %v", i, err)
} else {
t.Errorf("test %d, unexpected success", i)
}
}
if got := string(b); got != tt.want {
t.Errorf("test %d, Marshal(%#v) = %q, want %q", i, tt.in, got, tt.want)
}
}
}
type marshalPanic struct{}
func (marshalPanic) MarshalJSON() ([]byte, error) { panic(0xdead) }
func TestMarshalPanic(t *testing.T) {
defer func() {
if got := recover(); !reflect.DeepEqual(got, 0xdead) {
t.Errorf("panic() = (%T)(%v), want 0xdead", got, got)
}
}()
Marshal(&marshalPanic{})
t.Error("Marshal should have panicked")
}
func TestMarshalUncommonFieldNames(t *testing.T) {
v := struct {
A0, À, Aβ int
}{}
b, err := Marshal(v)
if err != nil {
t.Fatal("Marshal:", err)
}
want := `{"A0":0,"À":0,"Aβ":0}`
got := string(b)
if got != want {
t.Fatalf("Marshal: got %s want %s", got, want)
}
}