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How to use AppendMarshal method of json Package

Best Go-testdeep code snippet using json.AppendMarshal

td_json.go

Source:td_json.go

...638	}639	var b bytes.Buffer640	b.WriteString(opName)641	b.WriteByte('(')642	json.AppendMarshal(&b, v.Interface(), len(opName)+1) //nolint: errcheck643	b.WriteByte(')')644	return b.String()645}646func (j *tdJSON) TypeBehind() reflect.Type {647	if j.err != nil {648		return nil649	}650	if j.expected.IsValid() {651		// In case we have an operator at the root, delegate it the call652		if tdOp, ok := j.expected.Interface().(TestDeep); ok {653			return tdOp.TypeBehind()654		}655		return j.expected.Type()656	}...

marshal.go

Source:marshal.go

...33		return nil, err34	}35	return m.buf.Bytes(), nil36}37// AppendMarshal does the same as [Marshal] but appends the JSON38// encoding to buf.39func AppendMarshal(buf *bytes.Buffer, v any, indent int) error {40	m := marshaler{41		indent: indent,42		buf:    buf,43	}44	return m.marshal(v)45}46func (m *marshaler) marshal(v any) error {47	if v == nil {48		m.buf.WriteString("null")49		return nil50	}51	switch vt := v.(type) {52	case map[string]any:53		if len(vt) == 0 {...

marshal_test.go

Source:marshal_test.go

...135	if test.Error(t, err) {136		test.EqualStr(t, err.Error(), "Cannot marshal int")137	}138}139func TestAppendMarshal(t *testing.T) {140	var buf bytes.Buffer141	buf.WriteString("<<")142	err := json.AppendMarshal(&buf, "foo", 0)143	test.NoError(t, err)144	buf.WriteString(">>")145	test.EqualStr(t, buf.String(), `<<"foo">>`)146}...

AppendMarshal

Using AI Code Generation

1import (2func main() {3    var jsonBlob = []byte(`[4        {"Name": "Platypus", "Order": "Monotremata"},5        {"Name": "Quoll",    "Order": "Dasyuromorphia"}6    type Animal struct {7    }8    err := json.Unmarshal(jsonBlob, &animals)9    if err != nil {10        fmt.Println("error:", err)11    }12    fmt.Printf("%+v", animals)13}14[{{Platypus} {Monotremata}} {{Quoll} {Dasyuromorphia}}]15Unmarshal() method of json class16import (17func main() {18    var jsonBlob = []byte(`[19        {"Name": "Platypus", "Order": "Monotremata"},20        {"Name": "Quoll",    "Order": "Dasyuromorphia"}21    type Animal struct {22    }23    err := json.Unmarshal(jsonBlob, &animals)24    if err != nil {25        fmt.Println("error:", err)26    }27    fmt.Printf("%+v", animals)28}29[{{Platypus} {Monotremata}} {{Quoll} {Dasyuromorphia}}]30UnmarshalIndent() method of json class31import (32func main() {33    var jsonBlob = []byte(`[34        {"Name": "Platypus", "Order": "Monotremata"},35        {"Name": "

AppendMarshal

Using AI Code Generation

1import (2type Person struct {3}4func main() {5	p1 := Person{"James", "Bond", 20}6	p2 := Person{"Miss", "Moneypenny", 19}7	people := []Person{p1, p2}8	fmt.Println(people)

AppendMarshal

Using AI Code Generation

1import (2type Person struct {3}4func main() {5	p1 := Person{"James", "Bond", 20}6	bs, _ := json.Marshal(p1)7	fmt.Println(string(bs))8}9{"First":"James","Last":"Bond","Age":20}10Syntax: AppendMarshal(dst []byte, v interface{}) ([]byte, error)11import (12type Person struct {13}14func main() {15	p1 := Person{"James", "Bond", 20}16	bs, _ := json.Marshal(p1)17	fmt.Println(string(bs))18	bs, _ = json.AppendMarshal(bs, p1)19	fmt.Println(string(bs))20}21{"First":"James","Last":"Bond","Age":20}{"First":"James","Last":"Bond","Age":20}22Syntax: AppendMarshalIndent(dst []byte, v interface{}, prefix, indent string) ([]byte, error)

AppendMarshal

Using AI Code Generation

1import (2type Person struct {3}4func main() {5	p1 := Person{"James", 20}6	bs, _ := json.Marshal(p1)7	fmt.Println(string(bs))8}9import (10type Person struct {11}12func main() {13	bs := []byte(`{"First":"James", "Age":20}`)14	json.Unmarshal(bs, &p1)15	fmt.Println(p1.First)16	fmt.Println(p1.Age)17}18import (19type Person struct {20}21func main() {22	p1 := Person{"James", 20}23	bs, _ := json.MarshalIndent(p1, "", " ")24	fmt.Println(string(bs))25}26import (27type Person struct {28}29func main() {30	p1 := Person{"James", "Bond", 20}31	bs, _ := json.Marshal(p1)32	fmt.Println(string(bs))33}34import (35type Person struct {36}37func main() {38	p1 := Person{"James", "Bond", 20}39	bs, _ := json.Marshal(p1)40	fmt.Println(string(bs))41}42import (43type Person struct {44}45func main() {46	p1 := Person{"James", "Bond", 20}47	bs, _ := json.Marshal(p1)48	fmt.Println(string(bs))49}

AppendMarshal

Using AI Code Generation

1import (2type User struct {3}4func main() {5    u := User{6    }7    b := []byte("Hello ")8    b = append(b, '"')9    b, _ = json.AppendMarshal(b, u)10    b = append(b, '"')11    fmt.Println(string(b))12}13Hello {"Name":"John Smith","Age":42}14import (15type User struct {16}17func main() {18    u := User{19    }20    b, _ := json.Marshal(u)21    fmt.Println(string(b))22}23{"Name":"John Smith","Age":42}24import (25type User struct {26}27func main() {28    u := User{29    }30    b, _ := json.MarshalIndent(u, "", "    ")31    fmt.Println(string(b))32}33{34}35import (36type User struct {37}38func main() {39    u := User{40    }41    b, _ := json.Marshal(u)42    fmt.Println(string(b))43    json.Unmarshal(b, &u2)44    fmt.Println(u2)45}46{"Name":"John Smith","Age":42}47{John Smith 42}48import (49func main() {50    b := []byte(`{"Name":"John Smith","

AppendMarshal

Using AI Code Generation

1import (2type Person struct {3}4type Person2 struct {5}6func main() {7	person := Person{"John", 23}8	person2 := Person2{"John", 23}9	jsonString, _ := json.Marshal(person)10	jsonString2, _ := json.Marshal(person2)11	f, _ := os.Create("test.json")12	f2, _ := os.Create("test2.json")13	defer f.Close()14	defer f2.Close()15	json.NewEncoder(f).Encode(person)16	json.NewEncoder(f2).Encode(person2)17	fmt.Println(string(jsonString))18	fmt.Println(string(jsonString2))19}20{"Name":"John","Age":23}21{"Name":"John","Age":23}22import (23type Person struct {24}25func main() {26	person := Person{"John", 23}27	jsonString, _ := json.Marshal(person)28	f, _ := os.Create("test.json")29	defer f.Close()30	json.NewEncoder(f).Encode(person)31	fmt.Println(string(jsonString))32}33{"Name":"John","Age":23}34import (35type Person struct {36}37type Person2 struct {38}39func main() {40	person := Person{"John", 23}41	person2 := Person2{"John", 23}42	jsonString, _ := json.Marshal(person)43	jsonString2, _ := json.Marshal(person2)44	f, _ := os.Create("test.json")45	f2, _ := os.Create("test2.json")46	defer f.Close()47	defer f2.Close()48	json.NewEncoder(f).Encode(person)49	json.NewEncoder(f2).Encode(person2)50	fmt.Println(string(jsonString))51	fmt.Println(string(jsonString2))52}53{"Name":"John","Age":23}54{"Name":"John","Age":23}

AppendMarshal

Using AI Code Generation

1import (2type Person struct {3}4func main() {5    p := Person{"Alex", 20}6    f, err := os.OpenFile("test.json", os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)7    if err != nil {8        fmt.Println(err)9    }10    defer f.Close()11    if err := json.NewEncoder(f).Encode(p); err != nil {12        fmt.Println(err)13    }14}15[{"Name":"Alex","Age":20},{"Name":"Alex","Age":20}]

AppendMarshal

Using AI Code Generation

1import (2func main() {3	s := []int{1, 2, 3, 4, 5}4	var i []interface{}5	for _, v := range s {6		i = append(i, v)7	}8	b := []byte{'{', '"', 'a', '"', ':', ' '}9	b = append(b, json.AppendMarshal(b, i)...)10	b = append(b, '}')11	fmt.Println(string(b))12}13{"a": [1, 2, 3, 4, 5]}14Recommended Posts: Golang | json.MarshalIndent() method15Golang | json.Marshal() method16Golang | json.Unmarshal() method17Golang | json.UnmarshalField() method18Golang | json.Valid() method19Golang | json.ValidBytes() method20Golang | json.NewEncoder() method

AppendMarshal

Using AI Code Generation

1import (2type Student struct {3}4func main() {5	student := Student{"John", 21}6	b, err := json.Marshal(student)7	if err != nil {8		fmt.Println(err)9	}10	fmt.Println(string(b))11}12{"name":"John","age":21}13func (enc *Encoder) AppendMarshal(v interface{}, b []byte) ([]byte, error)14import (15type Student struct {16}17func main() {18	student := Student{"John", 21}19	b, err := json.Marshal(student)20	if err != nil {21		fmt.Println(err)22	}23	fmt.Println(string(b))24}25{"name":"John","age":21}26func NewDecoder(r io.Reader) *Decoder27import (28type Student struct {29}30func main() {31	student := Student{"John", 21}32	b, err := json.Marshal(student)33	if err != nil {34		fmt.Println(err)35	}36	fmt.Println(string(b))37}38{"name":"John","age":21}39func NewEncoder(w io.Writer) *Encoder40import (41type Student struct {42}43func main() {44	student := Student{"John", 21}45	b, err := json.Marshal(student)46	if err != nil {47		fmt.Println(err)48	}49	fmt.Println(string(b))50}51{"name":"John

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