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// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.
package json
import (
"encoding/json"
"testing"
"github.com/kylelemons/godebug/pretty"
)
func TestMarshalStruct(t *testing.T) {
tests := []struct {
desc string
value interface{}
want map[string]interface{}
err bool
}{
{
desc: "struct with no additional fields",
value: struct {
Name string
Int int
}{
Name: "my name",
Int: 5,
},
want: map[string]interface{}{
"Name": "my name",
"Int": 5,
},
},
{
desc: "*struct with AdditionalFields",
value: &struct {
Name string
Int int
AdditionalFields map[string]interface{} `json:"-"`
}{
Name: "John Doak",
Int: 45,
AdditionalFields: map[string]interface{}{
"Hello": "World",
"Float": 3.2,
},
},
want: map[string]interface{}{
"Name": "John Doak",
"Int": 45,
"Float": 3.2,
"Hello": "World",
},
},
{
desc: "AdditionalFields is not a map",
value: struct {
AdditionalFields string `json:"-"`
}{
AdditionalFields: "hello",
},
err: true,
},
{
desc: "AdditionalFields is not a map[string]interface{}",
value: struct {
AdditionalFields map[string]string `json:"-"`
}{
AdditionalFields: map[string]string{
"Hello": "World",
},
},
err: true,
},
{
desc: "Multiple Structs",
value: &StructA{
Name: "John",
ID: 3,
Meta: &StructB{
Address: "291 Street",
AdditionalFields: map[string]interface{}{
"unknown0": MarshalRaw(3.2),
},
},
AdditionalFields: map[string]interface{}{
"unknown0": MarshalRaw(10),
"unknown1": MarshalRaw("hello"),
},
},
want: map[string]interface{}{
"Name": "John",
"id": 3,
"Meta": map[string]interface{}{
"Address": "291 Street",
"unknown0": 3.2,
},
"unknown0": 10,
"unknown1": "hello",
},
},
{
desc: "Struct with map[string]interface{}",
value: struct {
Name string
Map map[string]interface{}
AdditionalFields map[string]interface{}
}{
Name: "John",
Map: map[string]interface{}{
"key": "value",
},
},
want: map[string]interface{}{
"Name": "John",
"Map": map[string]interface{}{
"key": "value",
},
},
},
{
desc: "Struct with map[string]struct{}",
value: struct {
Name string
Map map[string]StructB
AdditionalFields map[string]interface{}
}{
Name: "John",
Map: map[string]StructB{
"key": {
Address: "addr",
},
},
},
want: map[string]interface{}{
"Name": "John",
"Map": map[string]interface{}{
"key": map[string]interface{}{
"Address": "addr",
},
},
},
},
{
desc: "Struct with map[string][]<basic type>",
value: struct {
Name string
Map map[string]interface{}
AdditionalFields map[string]interface{}
}{
Name: "John",
Map: map[string]interface{}{
"key": []string{
"apples",
},
},
},
want: map[string]interface{}{
"Name": "John",
"Map": map[string]interface{}{
"key": []string{"apples"},
},
},
},
{
desc: "Struct with map[string][]struct",
value: struct {
Name string
Map map[string][]StructB
AdditionalFields map[string]interface{}
}{
Name: "John",
Map: map[string][]StructB{
"key": {
{Address: "addr"},
},
},
},
want: map[string]interface{}{
"Name": "John",
"Map": map[string]interface{}{
"key": []interface{}{
map[string]interface{}{
"Address": "addr",
},
},
},
},
},
}
for _, test := range tests {
b, err := Marshal(test.value)
switch {
case err == nil && test.err:
t.Errorf("TestMarshal(%s): got err == nil, want err != nil", test.desc)
continue
case err != nil && !test.err:
t.Errorf("TestMarshal(%s): got err == %s, want err == nil", test.desc, err)
continue
case err != nil:
continue
}
got := map[string]interface{}{}
if err := json.Unmarshal(b, &got); err != nil {
t.Errorf("TestMarshal(%s): Marshal produced invalid JSON:\n%s\n%s", test.desc, err, string(b))
continue
}
if diff := pretty.Compare(test.want, got); diff != "" {
t.Errorf("TestMarshal(%s): -want/+got:\n%s", test.desc, diff)
}
}
}
func TestEmptyTypes(t *testing.T) {
type structA struct {
EmptyMap map[string]bool
EmptySlice []string
Slice []string
EmptyInt int
Int int
AdditionalFields map[string]interface{}
}
val := structA{
EmptyMap: map[string]bool{},
Slice: []string{"hello"},
Int: 1,
}
b, err := Marshal(val)
if err != nil {
t.Fatalf("TestEmptyTypes: unexpected error on Marshal: %v", err)
}
got := structA{}
if err := Unmarshal(b, &got); err != nil {
t.Fatalf("TestEmptyTypes: unexpected error when Umarshalling: %v", err)
}
if diff := pretty.Compare(got, val); diff != "" {
t.Fatalf("TestEmptyTypes: -want/+got:\n%s", diff)
}
}
|
