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|
package jsonhooks
import (
"encoding/json"
"strings"
"testing"
"github.com/stretchr/testify/assert"
)
type Optionals struct {
Sr string `json:"sr"`
So string `json:"so,omitempty"`
Sw string `json:"-"`
Ir int `json:"omitempty"` // actually named omitempty, not an option
Io int `json:"io,omitempty"`
Slr []string `json:"slr,random"`
Slo []string `json:"slo,omitempty"`
Mr map[string]interface{} `json:"mr"`
Mo map[string]interface{} `json:",omitempty"`
Fr float64 `json:"fr"`
Fo float64 `json:"fo,omitempty"`
Br bool `json:"br"`
Bo bool `json:"bo,omitempty"`
Ur uint `json:"ur"`
Uo uint `json:"uo,omitempty"`
Str struct{} `json:"str"`
Sto struct{} `json:"sto,omitempty"`
}
type MixedTypes struct {
I int `json:"I"`
B bool `json:"B"`
F float64 `json:"F"`
S string `json:"S"`
St struct {
Foo int `json:"Foo"`
Bar string `json:"Bar"`
} `json:"St"`
A []string `json:"A"`
}
type WithHooks MixedTypes
func (hooks *WithHooks) PreMarshalJSON() error {
hooks.I *= 1000
hooks.B = !hooks.B
hooks.F *= 1.1
hooks.S = strings.ToUpper(hooks.S)
hooks.St.Foo *= 2000
hooks.St.Bar = strings.ToUpper(hooks.St.Bar)
for key, val := range hooks.A {
hooks.A[key] = strings.ToUpper(val)
}
return nil
}
func (hooks *WithHooks) PostUnmarshalJSON() error {
hooks.I /= 1000
hooks.B = !hooks.B
hooks.F /= 1.1
hooks.S = strings.ToLower(hooks.S)
hooks.St.Foo /= 2000
hooks.St.Bar = strings.ToLower(hooks.St.Bar)
for key, val := range hooks.A {
hooks.A[key] = strings.ToLower(val)
}
return nil
}
func TestMarshalCompat(t *testing.T) {
var o Optionals
o.Sw = "something"
o.Mr = map[string]interface{}{}
o.Mo = map[string]interface{}{}
expected, _ := json.Marshal(o)
actual, err := Marshal(o)
assert.NoError(t, err)
assert.Equal(
t,
expected,
actual,
)
}
func TestUnmarshalCompat(t *testing.T) {
data := `{
"sr": "",
"omitempty": 0,
"slr": null,
"mr": {},
"fr": 0,
"br": false,
"ur": 0,
"str": {},
"sto": {}
}`
expected := &Optionals{}
_ = json.Unmarshal([]byte(data), expected)
actual := &Optionals{}
err := Unmarshal([]byte(data), actual)
assert.NoError(t, err)
assert.Equal(
t,
expected,
actual,
)
}
func TestImplementsPreJSONMarshaler(t *testing.T) {
noHooks := &MixedTypes{}
withHooks := &WithHooks{}
assert.False(t, ImplementsPreJSONMarshaler(noHooks))
assert.True(t, ImplementsPreJSONMarshaler(withHooks))
}
func TestImplementsPostJSONUnmarshaler(t *testing.T) {
noHooks := &MixedTypes{}
withHooks := &WithHooks{}
assert.False(t, ImplementsPostJSONUnmarshaler(noHooks))
assert.True(t, ImplementsPostJSONUnmarshaler(withHooks))
}
func TestPreJSONMarshal(t *testing.T) {
noHooks := &MixedTypes{
I: 1,
B: true,
F: 1.0,
S: "testing",
St: struct {
Foo int `json:"Foo"`
Bar string `json:"Bar"`
}{2, "test"},
A: []string{"one", "two", "three"},
}
withHooks := (*WithHooks)(noHooks)
expected, _ := json.Marshal(&MixedTypes{
I: 1 * 1000,
B: !true,
F: 1.0 * 1.1,
S: "TESTING",
St: struct {
Foo int `json:"Foo"`
Bar string `json:"Bar"`
}{2 * 2000, "TEST"},
A: []string{"ONE", "TWO", "THREE"},
})
gojson, _ := json.Marshal(withHooks)
actualNoHooks, _ := Marshal(noHooks)
actualWithHooks, err := Marshal(withHooks)
assert.NoError(t, err)
assert.Equal(t, string(gojson), string(actualNoHooks))
assert.NotEqual(t, string(gojson), string(actualWithHooks))
assert.NotEqual(t, string(actualNoHooks), string(actualWithHooks))
assert.Equal(t, string(expected), string(actualWithHooks))
}
func TestPostJSONUnmarshal(t *testing.T) {
expected := &WithHooks{
I: 1,
B: true,
F: 1.0,
S: "testing",
St: struct {
Foo int `json:"Foo"`
Bar string `json:"Bar"`
}{2, "test"},
A: []string{"one", "two", "three"},
}
data := []byte(`{"I":1000,"B":false,"F":1.1,"S":"TESTING","St":{"Foo":4000,"Bar":"TEST"},"A":["ONE","TWO","THREE"]}`)
gojson := &MixedTypes{}
_ = json.Unmarshal(
data,
gojson,
)
withHooks := &WithHooks{}
err := Unmarshal(data, withHooks)
assert.NoError(t, err)
withoutHooks := &MixedTypes{}
err = Unmarshal(data, withoutHooks)
assert.NoError(t, err)
assert.NotEqual(t, gojson, withHooks)
assert.NotEqual(t, expected, withoutHooks)
assert.Equal(t, expected, withHooks)
}
|
