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package misc_tests
import (
"encoding/json"
"github.com/json-iterator/go"
"github.com/stretchr/testify/require"
"io"
"testing"
)
func Test_nil_non_empty_interface(t *testing.T) {
type TestObject struct {
Field []io.Closer
}
should := require.New(t)
obj := TestObject{}
b := []byte(`{"Field":["AAA"]}`)
should.NotNil(json.Unmarshal(b, &obj))
should.NotNil(jsoniter.Unmarshal(b, &obj))
}
func Test_nil_out_null_interface(t *testing.T) {
type TestData struct {
Field interface{} `json:"field"`
}
should := require.New(t)
var boolVar bool
obj := TestData{
Field: &boolVar,
}
data1 := []byte(`{"field": true}`)
err := jsoniter.Unmarshal(data1, &obj)
should.NoError(err)
should.Equal(true, *(obj.Field.(*bool)))
data2 := []byte(`{"field": null}`)
err = jsoniter.Unmarshal(data2, &obj)
should.NoError(err)
should.Nil(obj.Field)
// Checking stdlib behavior matches.
obj2 := TestData{
Field: &boolVar,
}
err = json.Unmarshal(data1, &obj2)
should.NoError(err)
should.Equal(true, *(obj2.Field.(*bool)))
err = json.Unmarshal(data2, &obj2)
should.NoError(err)
should.Equal(nil, obj2.Field)
}
func Test_overwrite_interface_ptr_value_with_nil(t *testing.T) {
type Wrapper struct {
Payload interface{} `json:"payload,omitempty"`
}
type Payload struct {
Value int `json:"val,omitempty"`
}
should := require.New(t)
payload := &Payload{}
wrapper := &Wrapper{
Payload: &payload,
}
err := json.Unmarshal([]byte(`{"payload": {"val": 42}}`), &wrapper)
should.NoError(err)
should.Equal(&payload, wrapper.Payload)
should.Equal(42, (*(wrapper.Payload.(**Payload))).Value)
err = json.Unmarshal([]byte(`{"payload": null}`), &wrapper)
should.NoError(err)
should.Equal(&payload, wrapper.Payload)
should.Equal((*Payload)(nil), payload)
payload = &Payload{}
wrapper = &Wrapper{
Payload: &payload,
}
err = jsoniter.Unmarshal([]byte(`{"payload": {"val": 42}}`), &wrapper)
should.Equal(nil, err)
should.Equal(&payload, wrapper.Payload)
should.Equal(42, (*(wrapper.Payload.(**Payload))).Value)
err = jsoniter.Unmarshal([]byte(`{"payload": null}`), &wrapper)
should.NoError(err)
should.Equal(&payload, wrapper.Payload)
should.Equal((*Payload)(nil), payload)
}
func Test_overwrite_interface_value_with_nil(t *testing.T) {
type Wrapper struct {
Payload interface{} `json:"payload,omitempty"`
}
type Payload struct {
Value int `json:"val,omitempty"`
}
should := require.New(t)
payload := &Payload{}
wrapper := &Wrapper{
Payload: payload,
}
err := json.Unmarshal([]byte(`{"payload": {"val": 42}}`), &wrapper)
should.NoError(err)
should.Equal(42, wrapper.Payload.(*Payload).Value)
err = json.Unmarshal([]byte(`{"payload": null}`), &wrapper)
should.NoError(err)
should.Equal(nil, wrapper.Payload)
should.Equal(42, payload.Value)
payload = &Payload{}
wrapper = &Wrapper{
Payload: payload,
}
err = jsoniter.Unmarshal([]byte(`{"payload": {"val": 42}}`), &wrapper)
should.Equal(nil, err)
should.Equal(42, wrapper.Payload.(*Payload).Value)
err = jsoniter.Unmarshal([]byte(`{"payload": null}`), &wrapper)
should.Equal(nil, err)
should.Equal(nil, wrapper.Payload)
should.Equal(42, payload.Value)
}
func Test_unmarshal_into_nil(t *testing.T) {
type Payload struct {
Value int `json:"val,omitempty"`
}
type Wrapper struct {
Payload interface{} `json:"payload,omitempty"`
}
should := require.New(t)
var payload *Payload
wrapper := &Wrapper{
Payload: payload,
}
err := json.Unmarshal([]byte(`{"payload": {"val": 42}}`), &wrapper)
should.NoError(err)
should.NotNil(wrapper.Payload)
should.Nil(payload)
err = json.Unmarshal([]byte(`{"payload": null}`), &wrapper)
should.NoError(err)
should.Nil(wrapper.Payload)
should.Nil(payload)
payload = nil
wrapper = &Wrapper{
Payload: payload,
}
err = jsoniter.Unmarshal([]byte(`{"payload": {"val": 42}}`), &wrapper)
should.NoError(err)
should.NotNil(wrapper.Payload)
should.Nil(payload)
err = jsoniter.Unmarshal([]byte(`{"payload": null}`), &wrapper)
should.NoError(err)
should.Nil(wrapper.Payload)
should.Nil(payload)
}
|
