clair/vendor/github.com/matttproud/golang_protobuf_extensions/pbtest/quick.go
2016-06-07 10:08:50 +02:00

79 lines
2.3 KiB
Go

// Copyright 2015 Matt T. Proud
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package pbtest
import (
"errors"
"reflect"
"github.com/golang/protobuf/proto"
)
var (
errNotPointer = errors.New("pbtest: cannot sanitize non-pointer message")
errNotStruct = errors.New("pbtest: cannot sanitize non-struct message")
)
// SanitizeGenerated empties the private state fields of Protocol Buffer
// messages that have been generated by the testing/quick package or returns
// an error indicating a problem it encountered.
func SanitizeGenerated(m proto.Message) error {
return sanitizeGenerated(m, 0)
}
func sanitizeGenerated(m proto.Message, l int) error {
typ := reflect.TypeOf(m)
if typ.Kind() != reflect.Ptr {
if l == 0 {
// Changes cannot be applied to non-pointers.
return errNotPointer
}
return nil
}
if elemTyp := typ.Elem(); elemTyp.Kind() != reflect.Struct {
if l == 0 {
// Protocol Buffer messages are structures; only they can be cleaned.
return errNotStruct
}
return nil
}
elem := reflect.ValueOf(m).Elem()
for i := 0; i < elem.NumField(); i++ {
field := elem.Field(i)
if field.Type().Implements(reflect.TypeOf((*proto.Message)(nil)).Elem()) {
if err := sanitizeGenerated(field.Interface().(proto.Message), l+1); err != nil {
return err
}
}
if field.Kind() == reflect.Slice {
for i := 0; i < field.Len(); i++ {
elem := field.Index(i)
if elem.Type().Implements(reflect.TypeOf((*proto.Message)(nil)).Elem()) {
if err := sanitizeGenerated(elem.Interface().(proto.Message), l+1); err != nil {
return err
}
}
}
}
}
if field := elem.FieldByName("XXX_unrecognized"); field.IsValid() {
field.Set(reflect.ValueOf([]byte{}))
}
if field := elem.FieldByName("XXX_extensions"); field.IsValid() {
field.Set(reflect.ValueOf(nil))
}
return nil
}