Implement json marshal / unmarshal so it can be used by PatchJson6902Transformer

kyaml/yaml/types.go

@@ -5,6 +5,7 @@ package yaml
 
 import (
 	"bytes"
+	"encoding/json"
 	"fmt"
 	"io/ioutil"
 	"strings"
@@ -681,6 +682,29 @@ func (rn *RNode) GetAssociativeKey() string {
 	return ""
 }
 
+func (rn *RNode) MarshalJSON() ([]byte, error) {
+	s, err := rn.String()
+	if err != nil {
+		return nil, err
+	}
+
+	m := map[string]interface{}{}
+	if err := Unmarshal([]byte(s), &m); err != nil {
+		return nil, err
+	}
+
+	return json.Marshal(m)
+}
+
+func (rn *RNode) UnmarshalJSON(b []byte) error {
+	r, err := Parse(string(b))
+	if err != nil {
+		return err
+	}
+	rn.value = r.value
+	return nil
+}
+
 // checkKey returns true if all elems have the key
 func checkKey(key string, elems []*Node) bool {
 	count := 0

kyaml/yaml/types_test.go

@@ -4,6 +4,7 @@
 package yaml
 
 import (
+	"strings"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -47,3 +48,41 @@ spec:
 		t.FailNow()
 	}
 }
+
+func TestRNode_UnmarshalJSON(t *testing.T) {
+	instance := &RNode{}
+	err := instance.UnmarshalJSON([]byte(`{"hello":"world"}`))
+	if !assert.NoError(t, err) {
+		t.FailNow()
+	}
+	actual, err := instance.String()
+	if !assert.NoError(t, err) {
+		t.FailNow()
+	}
+
+	expected := `{"hello": "world"}`
+	if !assert.Equal(t,
+		strings.TrimSpace(expected), strings.TrimSpace(actual)) {
+		t.FailNow()
+	}
+}
+
+func TestRNode_MarshalJSON(t *testing.T) {
+	instance, err := Parse(`
+hello: world
+`)
+	if !assert.NoError(t, err) {
+		t.FailNow()
+	}
+
+	actual, err := instance.MarshalJSON()
+	if !assert.NoError(t, err) {
+		t.FailNow()
+	}
+
+	expected := `{"hello":"world"}`
+	if !assert.Equal(t,
+		strings.TrimSpace(expected), strings.TrimSpace(string(actual))) {
+		t.FailNow()
+	}
+}