forked from mirror/go-json
610 lines
15 KiB
Go
610 lines
15 KiB
Go
package json_test
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import (
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"errors"
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"fmt"
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"testing"
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"time"
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"github.com/goccy/go-json"
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)
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type recursiveT struct {
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A *recursiveT `json:"a,omitempty"`
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B *recursiveU `json:"b,omitempty"`
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C *recursiveU `json:"c,omitempty"`
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D string `json:"d,omitempty"`
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}
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type recursiveU struct {
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T *recursiveT `json:"t,omitempty"`
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}
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func Test_Marshal(t *testing.T) {
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t.Run("int", func(t *testing.T) {
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bytes, err := json.Marshal(-10)
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assertErr(t, err)
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assertEq(t, "int", `-10`, string(bytes))
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})
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t.Run("int8", func(t *testing.T) {
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bytes, err := json.Marshal(int8(-11))
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assertErr(t, err)
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assertEq(t, "int8", `-11`, string(bytes))
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})
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t.Run("int16", func(t *testing.T) {
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bytes, err := json.Marshal(int16(-12))
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assertErr(t, err)
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assertEq(t, "int16", `-12`, string(bytes))
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})
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t.Run("int32", func(t *testing.T) {
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bytes, err := json.Marshal(int32(-13))
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assertErr(t, err)
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assertEq(t, "int32", `-13`, string(bytes))
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})
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t.Run("int64", func(t *testing.T) {
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bytes, err := json.Marshal(int64(-14))
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assertErr(t, err)
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assertEq(t, "int64", `-14`, string(bytes))
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})
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t.Run("uint", func(t *testing.T) {
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bytes, err := json.Marshal(uint(10))
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assertErr(t, err)
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assertEq(t, "uint", `10`, string(bytes))
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})
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t.Run("uint8", func(t *testing.T) {
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bytes, err := json.Marshal(uint8(11))
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assertErr(t, err)
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assertEq(t, "uint8", `11`, string(bytes))
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})
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t.Run("uint16", func(t *testing.T) {
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bytes, err := json.Marshal(uint16(12))
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assertErr(t, err)
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assertEq(t, "uint16", `12`, string(bytes))
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})
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t.Run("uint32", func(t *testing.T) {
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bytes, err := json.Marshal(uint32(13))
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assertErr(t, err)
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assertEq(t, "uint32", `13`, string(bytes))
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})
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t.Run("uint64", func(t *testing.T) {
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bytes, err := json.Marshal(uint64(14))
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assertErr(t, err)
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assertEq(t, "uint64", `14`, string(bytes))
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})
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t.Run("float32", func(t *testing.T) {
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bytes, err := json.Marshal(float32(3.14))
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assertErr(t, err)
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assertEq(t, "float32", `3.14`, string(bytes))
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})
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t.Run("float64", func(t *testing.T) {
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bytes, err := json.Marshal(float64(3.14))
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assertErr(t, err)
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assertEq(t, "float64", `3.14`, string(bytes))
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})
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t.Run("bool", func(t *testing.T) {
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bytes, err := json.Marshal(true)
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assertErr(t, err)
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assertEq(t, "bool", `true`, string(bytes))
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})
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t.Run("string", func(t *testing.T) {
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bytes, err := json.Marshal("hello world")
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assertErr(t, err)
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assertEq(t, "string", `"hello world"`, string(bytes))
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})
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t.Run("struct", func(t *testing.T) {
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bytes, err := json.Marshal(struct {
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A int `json:"a"`
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B uint `json:"b"`
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C string `json:"c"`
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D int `json:"-"` // ignore field
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a int `json:"aa"` // private field
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}{
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A: -1,
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B: 1,
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C: "hello world",
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})
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assertErr(t, err)
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assertEq(t, "struct", `{"a":-1,"b":1,"c":"hello world"}`, string(bytes))
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t.Run("null", func(t *testing.T) {
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type T struct {
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A *struct{} `json:"a"`
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}
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var v T
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bytes, err := json.Marshal(&v)
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assertErr(t, err)
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assertEq(t, "struct", `{"a":null}`, string(bytes))
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})
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t.Run("recursive", func(t *testing.T) {
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bytes, err := json.Marshal(recursiveT{
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A: &recursiveT{
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B: &recursiveU{
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T: &recursiveT{
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D: "hello",
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},
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},
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C: &recursiveU{
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T: &recursiveT{
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D: "world",
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},
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},
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},
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})
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assertErr(t, err)
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assertEq(t, "recursive", `{"a":{"b":{"t":{"d":"hello"}},"c":{"t":{"d":"world"}}}}`, string(bytes))
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})
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t.Run("embedded", func(t *testing.T) {
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type T struct {
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A string `json:"a"`
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}
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type U struct {
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*T
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B string `json:"b"`
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}
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type T2 struct {
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A string `json:"a,omitempty"`
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}
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type U2 struct {
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*T2
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B string `json:"b,omitempty"`
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}
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t.Run("exists field", func(t *testing.T) {
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bytes, err := json.Marshal(&U{
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T: &T{
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A: "aaa",
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},
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B: "bbb",
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})
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assertErr(t, err)
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assertEq(t, "embedded", `{"a":"aaa","b":"bbb"}`, string(bytes))
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t.Run("omitempty", func(t *testing.T) {
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bytes, err := json.Marshal(&U2{
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T2: &T2{
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A: "aaa",
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},
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B: "bbb",
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})
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assertErr(t, err)
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assertEq(t, "embedded", `{"a":"aaa","b":"bbb"}`, string(bytes))
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})
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})
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t.Run("none field", func(t *testing.T) {
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bytes, err := json.Marshal(&U{
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B: "bbb",
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})
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assertErr(t, err)
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assertEq(t, "embedded", `{"b":"bbb"}`, string(bytes))
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t.Run("omitempty", func(t *testing.T) {
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bytes, err := json.Marshal(&U2{
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B: "bbb",
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})
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assertErr(t, err)
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assertEq(t, "embedded", `{"b":"bbb"}`, string(bytes))
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})
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})
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})
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t.Run("omitempty", func(t *testing.T) {
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type T struct {
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A int `json:",omitempty"`
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B int8 `json:",omitempty"`
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C int16 `json:",omitempty"`
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D int32 `json:",omitempty"`
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E int64 `json:",omitempty"`
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F uint `json:",omitempty"`
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G uint8 `json:",omitempty"`
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H uint16 `json:",omitempty"`
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I uint32 `json:",omitempty"`
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J uint64 `json:",omitempty"`
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K float32 `json:",omitempty"`
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L float64 `json:",omitempty"`
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O string `json:",omitempty"`
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P bool `json:",omitempty"`
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Q []int `json:",omitempty"`
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R map[string]interface{} `json:",omitempty"`
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S *struct{} `json:",omitempty"`
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T int `json:"t,omitempty"`
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}
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var v T
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v.T = 1
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bytes, err := json.Marshal(&v)
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assertErr(t, err)
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assertEq(t, "struct", `{"t":1}`, string(bytes))
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t.Run("int", func(t *testing.T) {
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var v struct {
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A int `json:"a,omitempty"`
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B int `json:"b"`
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}
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v.B = 1
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bytes, err := json.Marshal(&v)
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assertErr(t, err)
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assertEq(t, "int", `{"b":1}`, string(bytes))
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})
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t.Run("int8", func(t *testing.T) {
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var v struct {
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A int `json:"a,omitempty"`
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B int8 `json:"b"`
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}
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v.B = 1
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bytes, err := json.Marshal(&v)
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assertErr(t, err)
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assertEq(t, "int8", `{"b":1}`, string(bytes))
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})
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t.Run("int16", func(t *testing.T) {
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var v struct {
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A int `json:"a,omitempty"`
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B int16 `json:"b"`
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}
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v.B = 1
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bytes, err := json.Marshal(&v)
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assertErr(t, err)
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assertEq(t, "int16", `{"b":1}`, string(bytes))
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})
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t.Run("int32", func(t *testing.T) {
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var v struct {
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A int `json:"a,omitempty"`
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B int32 `json:"b"`
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}
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v.B = 1
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bytes, err := json.Marshal(&v)
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assertErr(t, err)
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assertEq(t, "int32", `{"b":1}`, string(bytes))
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})
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t.Run("int64", func(t *testing.T) {
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var v struct {
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A int `json:"a,omitempty"`
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B int64 `json:"b"`
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}
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v.B = 1
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bytes, err := json.Marshal(&v)
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assertErr(t, err)
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assertEq(t, "int64", `{"b":1}`, string(bytes))
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})
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t.Run("string", func(t *testing.T) {
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var v struct {
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A int `json:"a,omitempty"`
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B string `json:"b"`
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}
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v.B = "b"
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bytes, err := json.Marshal(&v)
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assertErr(t, err)
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assertEq(t, "string", `{"b":"b"}`, string(bytes))
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})
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t.Run("float32", func(t *testing.T) {
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var v struct {
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A int `json:"a,omitempty"`
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B float32 `json:"b"`
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}
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v.B = 1.1
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bytes, err := json.Marshal(&v)
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assertErr(t, err)
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assertEq(t, "float32", `{"b":1.1}`, string(bytes))
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})
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t.Run("float64", func(t *testing.T) {
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var v struct {
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A int `json:"a,omitempty"`
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B float64 `json:"b"`
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}
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v.B = 3.14
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bytes, err := json.Marshal(&v)
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assertErr(t, err)
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assertEq(t, "float64", `{"b":3.14}`, string(bytes))
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})
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t.Run("slice", func(t *testing.T) {
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var v struct {
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A int `json:"a,omitempty"`
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B []int `json:"b"`
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}
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v.B = []int{1, 2, 3}
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bytes, err := json.Marshal(&v)
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assertErr(t, err)
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assertEq(t, "slice", `{"b":[1,2,3]}`, string(bytes))
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})
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t.Run("array", func(t *testing.T) {
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var v struct {
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A int `json:"a,omitempty"`
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B [2]int `json:"b"`
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}
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v.B = [2]int{1, 2}
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bytes, err := json.Marshal(&v)
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assertErr(t, err)
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assertEq(t, "array", `{"b":[1,2]}`, string(bytes))
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})
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t.Run("map", func(t *testing.T) {
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v := new(struct {
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A int `json:"a,omitempty"`
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B map[string]interface{} `json:"b"`
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})
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v.B = map[string]interface{}{"c": 1}
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bytes, err := json.Marshal(v)
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assertErr(t, err)
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assertEq(t, "array", `{"b":{"c":1}}`, string(bytes))
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})
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})
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t.Run("head_omitempty", func(t *testing.T) {
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type T struct {
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A *struct{} `json:"a,omitempty"`
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}
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var v T
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bytes, err := json.Marshal(&v)
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assertErr(t, err)
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assertEq(t, "struct", `{}`, string(bytes))
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})
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t.Run("pointer_head_omitempty", func(t *testing.T) {
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type V struct{}
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type U struct {
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B *V `json:"b,omitempty"`
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}
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type T struct {
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A *U `json:"a"`
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}
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bytes, err := json.Marshal(&T{A: &U{}})
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assertErr(t, err)
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assertEq(t, "struct", `{"a":{}}`, string(bytes))
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})
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t.Run("head_int_omitempty", func(t *testing.T) {
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type T struct {
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A int `json:"a,omitempty"`
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}
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var v T
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bytes, err := json.Marshal(&v)
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assertErr(t, err)
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assertEq(t, "struct", `{}`, string(bytes))
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})
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})
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t.Run("slice", func(t *testing.T) {
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t.Run("[]int", func(t *testing.T) {
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bytes, err := json.Marshal([]int{1, 2, 3, 4})
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assertErr(t, err)
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assertEq(t, "[]int", `[1,2,3,4]`, string(bytes))
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})
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t.Run("[]interface{}", func(t *testing.T) {
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bytes, err := json.Marshal([]interface{}{1, 2.1, "hello"})
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assertErr(t, err)
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assertEq(t, "[]interface{}", `[1,2.1,"hello"]`, string(bytes))
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})
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})
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t.Run("array", func(t *testing.T) {
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bytes, err := json.Marshal([4]int{1, 2, 3, 4})
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assertErr(t, err)
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assertEq(t, "array", `[1,2,3,4]`, string(bytes))
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})
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t.Run("map", func(t *testing.T) {
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t.Run("map[string]int", func(t *testing.T) {
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bytes, err := json.Marshal(map[string]int{
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"a": 1,
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"b": 2,
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"c": 3,
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"d": 4,
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})
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assertErr(t, err)
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assertEq(t, "map", len(`{"a":1,"b":2,"c":3,"d":4}`), len(string(bytes)))
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})
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t.Run("map[string]interface{}", func(t *testing.T) {
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type T struct {
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A int
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}
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v := map[string]interface{}{
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"a": 1,
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"b": 2.1,
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"c": &T{
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A: 10,
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},
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"d": 4,
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}
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bytes, err := json.Marshal(v)
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assertErr(t, err)
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assertEq(t, "map[string]interface{}", len(`{"a":1,"b":2.1,"c":{"A":10},"d":4}`), len(string(bytes)))
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})
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})
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}
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type marshalJSON struct{}
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func (*marshalJSON) MarshalJSON() ([]byte, error) {
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return []byte(`1`), nil
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}
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func Test_MarshalJSON(t *testing.T) {
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t.Run("*struct", func(t *testing.T) {
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bytes, err := json.Marshal(&marshalJSON{})
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assertErr(t, err)
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assertEq(t, "MarshalJSON", "1", string(bytes))
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})
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t.Run("time", func(t *testing.T) {
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bytes, err := json.Marshal(time.Time{})
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assertErr(t, err)
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assertEq(t, "MarshalJSON", `"0001-01-01T00:00:00Z"`, string(bytes))
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})
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}
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func Test_MarshalIndent(t *testing.T) {
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prefix := "-"
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indent := "\t"
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t.Run("struct", func(t *testing.T) {
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bytes, err := json.MarshalIndent(struct {
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A int `json:"a"`
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B uint `json:"b"`
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C string `json:"c"`
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D int `json:"-"` // ignore field
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a int `json:"aa"` // private field
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}{
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A: -1,
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B: 1,
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C: "hello world",
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}, prefix, indent)
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assertErr(t, err)
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result := "{\n-\t\"a\": -1,\n-\t\"b\": 1,\n-\t\"c\": \"hello world\"\n-}"
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assertEq(t, "struct", result, string(bytes))
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})
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t.Run("slice", func(t *testing.T) {
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t.Run("[]int", func(t *testing.T) {
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bytes, err := json.MarshalIndent([]int{1, 2, 3, 4}, prefix, indent)
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assertErr(t, err)
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result := "[\n-\t1,\n-\t2,\n-\t3,\n-\t4\n-]"
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assertEq(t, "[]int", result, string(bytes))
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})
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t.Run("[]interface{}", func(t *testing.T) {
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bytes, err := json.MarshalIndent([]interface{}{1, 2.1, "hello"}, prefix, indent)
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assertErr(t, err)
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result := "[\n-\t1,\n-\t2.1,\n-\t\"hello\"\n-]"
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assertEq(t, "[]interface{}", result, string(bytes))
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})
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})
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t.Run("array", func(t *testing.T) {
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bytes, err := json.MarshalIndent([4]int{1, 2, 3, 4}, prefix, indent)
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assertErr(t, err)
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result := "[\n-\t1,\n-\t2,\n-\t3,\n-\t4\n-]"
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assertEq(t, "array", result, string(bytes))
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})
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t.Run("map", func(t *testing.T) {
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t.Run("map[string]int", func(t *testing.T) {
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bytes, err := json.MarshalIndent(map[string]int{
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"a": 1,
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"b": 2,
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"c": 3,
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"d": 4,
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}, prefix, indent)
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assertErr(t, err)
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result := "{\n-\t\"a\": 1,\n-\t\"b\": 2,\n-\t\"c\": 3,\n-\t\"d\": 4\n-}"
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assertEq(t, "map", len(result), len(string(bytes)))
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})
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t.Run("map[string]interface{}", func(t *testing.T) {
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type T struct {
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E int
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F int
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}
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v := map[string]interface{}{
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"a": 1,
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"b": 2.1,
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"c": &T{
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E: 10,
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F: 11,
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},
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"d": 4,
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}
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bytes, err := json.MarshalIndent(v, prefix, indent)
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assertErr(t, err)
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result := "{\n-\t\"a\": 1,\n-\t\"b\": 2.1,\n-\t\"c\": {\n-\t\t\"E\": 10,\n-\t\t\"F\": 11\n-\t},\n-\t\"d\": 4\n-}"
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assertEq(t, "map[string]interface{}", len(result), len(string(bytes)))
|
|
})
|
|
})
|
|
}
|
|
|
|
type marshalerError struct{}
|
|
|
|
func (*marshalerError) MarshalJSON() ([]byte, error) {
|
|
return nil, errors.New("unexpected error")
|
|
}
|
|
|
|
func Test_MarshalerError(t *testing.T) {
|
|
var v marshalerError
|
|
_, err := json.Marshal(&v)
|
|
expect := `json: error calling MarshalJSON for type *json_test.marshalerError: unexpected error`
|
|
assertEq(t, "marshaler error", expect, fmt.Sprint(err))
|
|
}
|
|
|
|
// 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 := json.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 := json.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 = json.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)
|
|
}
|
|
}
|