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|
package json
import (
"bytes"
"math"
"math/big"
"strconv"
"testing"
)
var (
oneInt = new(big.Int).SetInt64(1)
oneFloat = new(big.Float).SetFloat64(1.0)
)
func TestValue(t *testing.T) {
cases := map[string]struct {
setter func(Value)
expected string
}{
"string value": {
setter: func(value Value) {
value.String("foo")
},
expected: `"foo"`,
},
"string escaped": {
setter: func(value Value) {
value.String(`{"foo":"bar"}`)
},
expected: `"{\"foo\":\"bar\"}"`,
},
"integer": {
setter: func(value Value) {
value.Long(1024)
},
expected: `1024`,
},
"float": {
setter: func(value Value) {
value.Double(1e20)
},
expected: `100000000000000000000`,
},
"float exponent component": {
setter: func(value Value) {
value.Double(3e22)
},
expected: `3e+22`,
},
"boolean true": {
setter: func(value Value) {
value.Boolean(true)
},
expected: `true`,
},
"boolean false": {
setter: func(value Value) {
value.Boolean(false)
},
expected: `false`,
},
"encode bytes": {
setter: func(value Value) {
value.Base64EncodeBytes([]byte("foo bar"))
},
expected: `"Zm9vIGJhcg=="`,
},
"encode bytes nil": {
setter: func(value Value) {
value.Base64EncodeBytes(nil)
},
expected: `null`,
},
"object": {
setter: func(value Value) {
o := value.Object()
defer o.Close()
o.Key("key").String("value")
},
expected: `{"key":"value"}`,
},
"array": {
setter: func(value Value) {
o := value.Array()
defer o.Close()
o.Value().String("value1")
o.Value().String("value2")
},
expected: `["value1","value2"]`,
},
"null": {
setter: func(value Value) {
value.Null()
},
expected: `null`,
},
"write bytes": {
setter: func(value Value) {
o := value.Object()
o.Key("inline").Write([]byte(`{"nested":"value"}`))
defer o.Close()
},
expected: `{"inline":{"nested":"value"}}`,
},
"bigInteger": {
setter: func(value Value) {
v := new(big.Int).SetInt64(math.MaxInt64)
value.BigInteger(v.Sub(v, oneInt))
},
expected: strconv.FormatInt(math.MaxInt64-1, 10),
},
"bigInteger > int64": {
setter: func(value Value) {
v := new(big.Int).SetInt64(math.MaxInt64)
value.BigInteger(v.Add(v, oneInt))
},
expected: "9223372036854775808",
},
"bigInteger < int64": {
setter: func(value Value) {
v := new(big.Int).SetInt64(math.MinInt64)
value.BigInteger(v.Sub(v, oneInt))
},
expected: "-9223372036854775809",
},
"bigFloat": {
setter: func(value Value) {
v := new(big.Float).SetFloat64(math.MaxFloat64)
value.BigDecimal(v.Sub(v, oneFloat))
},
expected: strconv.FormatFloat(math.MaxFloat64-1, 'e', -1, 64),
},
"bigFloat fits in int64": {
setter: func(value Value) {
v := new(big.Float).SetInt64(math.MaxInt64)
value.BigDecimal(v)
},
expected: "9223372036854775807",
},
}
scratch := make([]byte, 64)
for name, tt := range cases {
t.Run(name, func(t *testing.T) {
var b bytes.Buffer
value := newValue(&b, &scratch)
tt.setter(value)
if e, a := []byte(tt.expected), b.Bytes(); bytes.Compare(e, a) != 0 {
t.Errorf("expected %+q, but got %+q", e, a)
}
})
}
}
|
