mirror of https://github.com/goccy/go-json.git
333 lines
8.5 KiB
Go
333 lines
8.5 KiB
Go
package json_test
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import (
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"fmt"
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"reflect"
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"strings"
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"testing"
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"github.com/goccy/go-json"
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)
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func Test_Decoder(t *testing.T) {
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t.Run("int", func(t *testing.T) {
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var v int
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assertErr(t, json.Unmarshal([]byte(`-1`), &v))
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assertEq(t, "int", int(-1), v)
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})
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t.Run("int8", func(t *testing.T) {
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var v int8
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assertErr(t, json.Unmarshal([]byte(`-2`), &v))
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assertEq(t, "int8", int8(-2), v)
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})
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t.Run("int16", func(t *testing.T) {
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var v int16
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assertErr(t, json.Unmarshal([]byte(`-3`), &v))
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assertEq(t, "int16", int16(-3), v)
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})
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t.Run("int32", func(t *testing.T) {
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var v int32
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assertErr(t, json.Unmarshal([]byte(`-4`), &v))
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assertEq(t, "int32", int32(-4), v)
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})
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t.Run("int64", func(t *testing.T) {
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var v int64
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assertErr(t, json.Unmarshal([]byte(`-5`), &v))
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assertEq(t, "int64", int64(-5), v)
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})
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t.Run("uint", func(t *testing.T) {
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var v uint
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assertErr(t, json.Unmarshal([]byte(`1`), &v))
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assertEq(t, "uint", uint(1), v)
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})
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t.Run("uint8", func(t *testing.T) {
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var v uint8
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assertErr(t, json.Unmarshal([]byte(`2`), &v))
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assertEq(t, "uint8", uint8(2), v)
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})
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t.Run("uint16", func(t *testing.T) {
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var v uint16
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assertErr(t, json.Unmarshal([]byte(`3`), &v))
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assertEq(t, "uint16", uint16(3), v)
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})
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t.Run("uint32", func(t *testing.T) {
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var v uint32
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assertErr(t, json.Unmarshal([]byte(`4`), &v))
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assertEq(t, "uint32", uint32(4), v)
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})
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t.Run("uint64", func(t *testing.T) {
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var v uint64
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assertErr(t, json.Unmarshal([]byte(`5`), &v))
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assertEq(t, "uint64", uint64(5), v)
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})
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t.Run("bool", func(t *testing.T) {
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t.Run("true", func(t *testing.T) {
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var v bool
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assertErr(t, json.Unmarshal([]byte(`true`), &v))
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assertEq(t, "bool", true, v)
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})
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t.Run("false", func(t *testing.T) {
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v := true
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assertErr(t, json.Unmarshal([]byte(`false`), &v))
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assertEq(t, "bool", false, v)
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})
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})
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t.Run("string", func(t *testing.T) {
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var v string
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assertErr(t, json.Unmarshal([]byte(`"hello"`), &v))
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assertEq(t, "string", "hello", v)
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})
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t.Run("float32", func(t *testing.T) {
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var v float32
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assertErr(t, json.Unmarshal([]byte(`3.14`), &v))
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assertEq(t, "float32", float32(3.14), v)
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})
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t.Run("float64", func(t *testing.T) {
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var v float64
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assertErr(t, json.Unmarshal([]byte(`3.14`), &v))
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assertEq(t, "float64", float64(3.14), v)
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})
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t.Run("slice", func(t *testing.T) {
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var v []int
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assertErr(t, json.Unmarshal([]byte(` [ 1 , 2 , 3 , 4 ] `), &v))
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assertEq(t, "slice", fmt.Sprint([]int{1, 2, 3, 4}), fmt.Sprint(v))
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})
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t.Run("array", func(t *testing.T) {
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var v [4]int
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assertErr(t, json.Unmarshal([]byte(` [ 1 , 2 , 3 , 4 ] `), &v))
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assertEq(t, "array", fmt.Sprint([4]int{1, 2, 3, 4}), fmt.Sprint(v))
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})
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t.Run("map", func(t *testing.T) {
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var v map[string]int
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assertErr(t, json.Unmarshal([]byte(` { "a": 1, "b": 2, "c": 3, "d": 4 } `), &v))
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assertEq(t, "map.a", v["a"], 1)
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assertEq(t, "map.b", v["b"], 2)
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assertEq(t, "map.c", v["c"], 3)
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assertEq(t, "map.d", v["d"], 4)
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t.Run("nested map", func(t *testing.T) {
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// https://github.com/goccy/go-json/issues/8
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content := `
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{
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"a": {
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"nestedA": "value of nested a"
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},
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"b": {
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"nestedB": "value of nested b"
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},
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"c": {
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"nestedC": "value of nested c"
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}
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}`
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var v map[string]interface{}
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assertErr(t, json.Unmarshal([]byte(content), &v))
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assertEq(t, "length", 3, len(v))
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})
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})
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t.Run("struct", func(t *testing.T) {
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type T struct {
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AA int `json:"aa"`
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BB string `json:"bb"`
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CC bool `json:"cc"`
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}
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var v struct {
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A int `json:"abcd"`
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B string `json:"str"`
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C bool
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D *T
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}
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content := []byte(`
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{
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"abcd": 123,
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"str" : "hello",
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"c" : true,
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"d" : {
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"aa": 2,
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"bb": "world",
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"cc": true
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}
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}`)
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assertErr(t, json.Unmarshal(content, &v))
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assertEq(t, "struct.A", 123, v.A)
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assertEq(t, "struct.B", "hello", v.B)
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assertEq(t, "struct.C", true, v.C)
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assertEq(t, "struct.D.AA", 2, v.D.AA)
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assertEq(t, "struct.D.BB", "world", v.D.BB)
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assertEq(t, "struct.D.CC", true, v.D.CC)
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t.Run("struct.field null", func(t *testing.T) {
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var v struct {
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A string
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B []string
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C []int
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D map[string]interface{}
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E [2]string
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F interface{}
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}
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assertErr(t, json.Unmarshal([]byte(`{"a":null,"b":null,"c":null,"d":null,"e":null,"f":null}`), &v))
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assertEq(t, "string", v.A, "")
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assertNeq(t, "[]string", v.B, nil)
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assertEq(t, "[]string", len(v.B), 0)
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assertNeq(t, "[]int", v.C, nil)
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assertEq(t, "[]int", len(v.C), 0)
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assertNeq(t, "map", v.D, nil)
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assertEq(t, "map", len(v.D), 0)
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assertNeq(t, "array", v.E, nil)
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assertEq(t, "array", len(v.E), 2)
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assertEq(t, "interface{}", v.F, nil)
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})
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})
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t.Run("interface", func(t *testing.T) {
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t.Run("number", func(t *testing.T) {
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var v interface{}
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assertErr(t, json.Unmarshal([]byte(`10`), &v))
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assertEq(t, "interface.kind", "float64", reflect.TypeOf(v).Kind().String())
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assertEq(t, "interface", `10`, fmt.Sprint(v))
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})
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t.Run("string", func(t *testing.T) {
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var v interface{}
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assertErr(t, json.Unmarshal([]byte(`"hello"`), &v))
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assertEq(t, "interface.kind", "string", reflect.TypeOf(v).Kind().String())
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assertEq(t, "interface", `hello`, fmt.Sprint(v))
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})
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t.Run("bool", func(t *testing.T) {
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var v interface{}
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assertErr(t, json.Unmarshal([]byte(`true`), &v))
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assertEq(t, "interface.kind", "bool", reflect.TypeOf(v).Kind().String())
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assertEq(t, "interface", `true`, fmt.Sprint(v))
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})
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t.Run("slice", func(t *testing.T) {
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var v interface{}
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assertErr(t, json.Unmarshal([]byte(`[1,2,3,4]`), &v))
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assertEq(t, "interface.kind", "slice", reflect.TypeOf(v).Kind().String())
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assertEq(t, "interface", `[1 2 3 4]`, fmt.Sprint(v))
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})
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t.Run("map", func(t *testing.T) {
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var v interface{}
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assertErr(t, json.Unmarshal([]byte(`{"a": 1, "b": "c"}`), &v))
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assertEq(t, "interface.kind", "map", reflect.TypeOf(v).Kind().String())
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m := v.(map[interface{}]interface{})
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assertEq(t, "interface", `1`, fmt.Sprint(m["a"]))
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assertEq(t, "interface", `c`, fmt.Sprint(m["b"]))
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})
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t.Run("null", func(t *testing.T) {
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var v interface{}
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v = 1
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assertErr(t, json.Unmarshal([]byte(`null`), &v))
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assertEq(t, "interface", nil, v)
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})
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})
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}
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func Test_Decoder_UseNumber(t *testing.T) {
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dec := json.NewDecoder(strings.NewReader(`{"a": 3.14}`))
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dec.UseNumber()
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var v map[string]interface{}
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assertErr(t, dec.Decode(&v))
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assertEq(t, "json.Number", "json.Number", fmt.Sprintf("%T", v["a"]))
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}
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type unmarshalJSON struct {
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v int
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}
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func (u *unmarshalJSON) UnmarshalJSON(b []byte) error {
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var v int
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if err := json.Unmarshal(b, &v); err != nil {
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return err
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}
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u.v = v
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return nil
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}
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func Test_UnmarshalJSON(t *testing.T) {
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t.Run("*struct", func(t *testing.T) {
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var v unmarshalJSON
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assertErr(t, json.Unmarshal([]byte(`10`), &v))
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assertEq(t, "unmarshal", v.v, 10)
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})
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}
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type unmarshalText struct {
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v int
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}
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func (u *unmarshalText) UnmarshalText(b []byte) error {
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var v int
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if err := json.Unmarshal(b, &v); err != nil {
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return err
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}
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u.v = v
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return nil
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}
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func Test_UnmarshalText(t *testing.T) {
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t.Run("*struct", func(t *testing.T) {
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var v unmarshalText
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assertErr(t, json.Unmarshal([]byte(`11`), &v))
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assertEq(t, "unmarshal", v.v, 11)
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})
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}
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func Test_InvalidUnmarshalError(t *testing.T) {
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t.Run("nil", func(t *testing.T) {
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var v *struct{}
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err := fmt.Sprint(json.Unmarshal([]byte(`{}`), v))
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assertEq(t, "invalid unmarshal error", "json: Unmarshal(nil *struct {})", err)
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})
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t.Run("non pointer", func(t *testing.T) {
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var v int
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err := fmt.Sprint(json.Unmarshal([]byte(`{}`), v))
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assertEq(t, "invalid unmarshal error", "json: Unmarshal(non-pointer int)", err)
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})
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}
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func Test_Token(t *testing.T) {
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dec := json.NewDecoder(strings.NewReader(`{"a": 1, "b": true, "c": [1, "two", null]}`))
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cnt := 0
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for {
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if _, err := dec.Token(); err != nil {
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break
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}
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cnt++
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}
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if cnt != 12 {
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t.Fatal("failed to parse token")
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}
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}
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func Test_DecodeStream(t *testing.T) {
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const stream = `
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[
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{"Name": "Ed", "Text": "Knock knock."},
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{"Name": "Sam", "Text": "Who's there?"},
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{"Name": "Ed", "Text": "Go fmt."},
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{"Name": "Sam", "Text": "Go fmt who?"},
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{"Name": "Ed", "Text": "Go fmt yourself!"}
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]
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`
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type Message struct {
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Name, Text string
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}
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dec := json.NewDecoder(strings.NewReader(stream))
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tk, err := dec.Token()
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assertErr(t, err)
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assertEq(t, "[", fmt.Sprint(tk), "[")
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elem := 0
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// while the array contains values
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for dec.More() {
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var m Message
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// decode an array value (Message)
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assertErr(t, dec.Decode(&m))
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if m.Name == "" || m.Text == "" {
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t.Fatal("failed to assign value to struct field")
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}
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elem++
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}
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assertEq(t, "decode count", elem, 5)
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tk, err = dec.Token()
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assertErr(t, err)
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assertEq(t, "]", fmt.Sprint(tk), "]")
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}
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