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