475 lines
12 KiB
Go
475 lines
12 KiB
Go
// Go support for Protocol Buffers - Google's data interchange format
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//
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// Copyright 2010 The Go Authors. All rights reserved.
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// https://github.com/golang/protobuf
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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package proto_test
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import (
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"bytes"
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"errors"
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"io/ioutil"
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"math"
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"strings"
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"testing"
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"github.com/golang/protobuf/proto"
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proto3pb "github.com/golang/protobuf/proto/proto3_proto"
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pb "github.com/golang/protobuf/proto/testdata"
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)
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// textMessage implements the methods that allow it to marshal and unmarshal
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// itself as text.
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type textMessage struct {
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}
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func (*textMessage) MarshalText() ([]byte, error) {
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return []byte("custom"), nil
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}
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func (*textMessage) UnmarshalText(bytes []byte) error {
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if string(bytes) != "custom" {
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return errors.New("expected 'custom'")
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}
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return nil
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}
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func (*textMessage) Reset() {}
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func (*textMessage) String() string { return "" }
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func (*textMessage) ProtoMessage() {}
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func newTestMessage() *pb.MyMessage {
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msg := &pb.MyMessage{
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Count: proto.Int32(42),
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Name: proto.String("Dave"),
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Quote: proto.String(`"I didn't want to go."`),
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Pet: []string{"bunny", "kitty", "horsey"},
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Inner: &pb.InnerMessage{
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Host: proto.String("footrest.syd"),
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Port: proto.Int32(7001),
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Connected: proto.Bool(true),
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},
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Others: []*pb.OtherMessage{
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{
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Key: proto.Int64(0xdeadbeef),
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Value: []byte{1, 65, 7, 12},
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},
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{
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Weight: proto.Float32(6.022),
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Inner: &pb.InnerMessage{
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Host: proto.String("lesha.mtv"),
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Port: proto.Int32(8002),
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},
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},
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},
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Bikeshed: pb.MyMessage_BLUE.Enum(),
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Somegroup: &pb.MyMessage_SomeGroup{
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GroupField: proto.Int32(8),
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},
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// One normally wouldn't do this.
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// This is an undeclared tag 13, as a varint (wire type 0) with value 4.
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XXX_unrecognized: []byte{13<<3 | 0, 4},
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}
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ext := &pb.Ext{
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Data: proto.String("Big gobs for big rats"),
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}
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if err := proto.SetExtension(msg, pb.E_Ext_More, ext); err != nil {
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panic(err)
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}
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greetings := []string{"adg", "easy", "cow"}
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if err := proto.SetExtension(msg, pb.E_Greeting, greetings); err != nil {
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panic(err)
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}
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// Add an unknown extension. We marshal a pb.Ext, and fake the ID.
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b, err := proto.Marshal(&pb.Ext{Data: proto.String("3G skiing")})
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if err != nil {
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panic(err)
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}
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b = append(proto.EncodeVarint(201<<3|proto.WireBytes), b...)
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proto.SetRawExtension(msg, 201, b)
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// Extensions can be plain fields, too, so let's test that.
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b = append(proto.EncodeVarint(202<<3|proto.WireVarint), 19)
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proto.SetRawExtension(msg, 202, b)
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return msg
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}
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const text = `count: 42
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name: "Dave"
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quote: "\"I didn't want to go.\""
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pet: "bunny"
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pet: "kitty"
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pet: "horsey"
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inner: <
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host: "footrest.syd"
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port: 7001
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connected: true
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>
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others: <
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key: 3735928559
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value: "\001A\007\014"
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>
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others: <
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weight: 6.022
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inner: <
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host: "lesha.mtv"
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port: 8002
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>
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>
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bikeshed: BLUE
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SomeGroup {
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group_field: 8
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}
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/* 2 unknown bytes */
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13: 4
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[testdata.Ext.more]: <
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data: "Big gobs for big rats"
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>
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[testdata.greeting]: "adg"
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[testdata.greeting]: "easy"
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[testdata.greeting]: "cow"
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/* 13 unknown bytes */
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201: "\t3G skiing"
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/* 3 unknown bytes */
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202: 19
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`
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func TestMarshalText(t *testing.T) {
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buf := new(bytes.Buffer)
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if err := proto.MarshalText(buf, newTestMessage()); err != nil {
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t.Fatalf("proto.MarshalText: %v", err)
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}
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s := buf.String()
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if s != text {
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t.Errorf("Got:\n===\n%v===\nExpected:\n===\n%v===\n", s, text)
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}
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}
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func TestMarshalTextCustomMessage(t *testing.T) {
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buf := new(bytes.Buffer)
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if err := proto.MarshalText(buf, &textMessage{}); err != nil {
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t.Fatalf("proto.MarshalText: %v", err)
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}
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s := buf.String()
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if s != "custom" {
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t.Errorf("Got %q, expected %q", s, "custom")
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}
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}
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func TestMarshalTextNil(t *testing.T) {
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want := "<nil>"
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tests := []proto.Message{nil, (*pb.MyMessage)(nil)}
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for i, test := range tests {
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buf := new(bytes.Buffer)
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if err := proto.MarshalText(buf, test); err != nil {
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t.Fatal(err)
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}
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if got := buf.String(); got != want {
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t.Errorf("%d: got %q want %q", i, got, want)
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}
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}
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}
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func TestMarshalTextUnknownEnum(t *testing.T) {
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// The Color enum only specifies values 0-2.
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m := &pb.MyMessage{Bikeshed: pb.MyMessage_Color(3).Enum()}
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got := m.String()
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const want = `bikeshed:3 `
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if got != want {
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t.Errorf("\n got %q\nwant %q", got, want)
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}
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}
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func TestTextOneof(t *testing.T) {
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tests := []struct {
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m proto.Message
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want string
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}{
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// zero message
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{&pb.Communique{}, ``},
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// scalar field
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{&pb.Communique{Union: &pb.Communique_Number{4}}, `number:4`},
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// message field
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{&pb.Communique{Union: &pb.Communique_Msg{
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&pb.Strings{StringField: proto.String("why hello!")},
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}}, `msg:<string_field:"why hello!" >`},
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// bad oneof (should not panic)
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{&pb.Communique{Union: &pb.Communique_Msg{nil}}, `msg:/* nil */`},
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}
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for _, test := range tests {
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got := strings.TrimSpace(test.m.String())
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if got != test.want {
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t.Errorf("\n got %s\nwant %s", got, test.want)
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}
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}
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}
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func BenchmarkMarshalTextBuffered(b *testing.B) {
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buf := new(bytes.Buffer)
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m := newTestMessage()
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for i := 0; i < b.N; i++ {
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buf.Reset()
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proto.MarshalText(buf, m)
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}
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}
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func BenchmarkMarshalTextUnbuffered(b *testing.B) {
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w := ioutil.Discard
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m := newTestMessage()
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for i := 0; i < b.N; i++ {
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proto.MarshalText(w, m)
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}
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}
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func compact(src string) string {
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// s/[ \n]+/ /g; s/ $//;
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dst := make([]byte, len(src))
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space, comment := false, false
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j := 0
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for i := 0; i < len(src); i++ {
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if strings.HasPrefix(src[i:], "/*") {
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comment = true
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i++
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continue
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}
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if comment && strings.HasPrefix(src[i:], "*/") {
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comment = false
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i++
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continue
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}
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if comment {
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continue
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}
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c := src[i]
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if c == ' ' || c == '\n' {
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space = true
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continue
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}
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if j > 0 && (dst[j-1] == ':' || dst[j-1] == '<' || dst[j-1] == '{') {
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space = false
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}
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if c == '{' {
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space = false
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}
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if space {
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dst[j] = ' '
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j++
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space = false
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}
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dst[j] = c
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j++
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}
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if space {
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dst[j] = ' '
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j++
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}
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return string(dst[0:j])
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}
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var compactText = compact(text)
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func TestCompactText(t *testing.T) {
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s := proto.CompactTextString(newTestMessage())
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if s != compactText {
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t.Errorf("Got:\n===\n%v===\nExpected:\n===\n%v\n===\n", s, compactText)
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}
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}
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func TestStringEscaping(t *testing.T) {
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testCases := []struct {
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in *pb.Strings
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out string
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}{
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{
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// Test data from C++ test (TextFormatTest.StringEscape).
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// Single divergence: we don't escape apostrophes.
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&pb.Strings{StringField: proto.String("\"A string with ' characters \n and \r newlines and \t tabs and \001 slashes \\ and multiple spaces")},
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"string_field: \"\\\"A string with ' characters \\n and \\r newlines and \\t tabs and \\001 slashes \\\\ and multiple spaces\"\n",
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},
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{
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// Test data from the same C++ test.
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&pb.Strings{StringField: proto.String("\350\260\267\346\255\214")},
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"string_field: \"\\350\\260\\267\\346\\255\\214\"\n",
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},
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{
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// Some UTF-8.
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&pb.Strings{StringField: proto.String("\x00\x01\xff\x81")},
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`string_field: "\000\001\377\201"` + "\n",
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},
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}
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for i, tc := range testCases {
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var buf bytes.Buffer
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if err := proto.MarshalText(&buf, tc.in); err != nil {
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t.Errorf("proto.MarsalText: %v", err)
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continue
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}
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s := buf.String()
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if s != tc.out {
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t.Errorf("#%d: Got:\n%s\nExpected:\n%s\n", i, s, tc.out)
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continue
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}
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// Check round-trip.
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pb := new(pb.Strings)
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if err := proto.UnmarshalText(s, pb); err != nil {
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t.Errorf("#%d: UnmarshalText: %v", i, err)
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continue
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}
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if !proto.Equal(pb, tc.in) {
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t.Errorf("#%d: Round-trip failed:\nstart: %v\n end: %v", i, tc.in, pb)
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}
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}
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}
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// A limitedWriter accepts some output before it fails.
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// This is a proxy for something like a nearly-full or imminently-failing disk,
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// or a network connection that is about to die.
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type limitedWriter struct {
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b bytes.Buffer
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limit int
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}
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var outOfSpace = errors.New("proto: insufficient space")
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func (w *limitedWriter) Write(p []byte) (n int, err error) {
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var avail = w.limit - w.b.Len()
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if avail <= 0 {
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return 0, outOfSpace
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}
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if len(p) <= avail {
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return w.b.Write(p)
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}
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n, _ = w.b.Write(p[:avail])
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return n, outOfSpace
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}
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func TestMarshalTextFailing(t *testing.T) {
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// Try lots of different sizes to exercise more error code-paths.
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for lim := 0; lim < len(text); lim++ {
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buf := new(limitedWriter)
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buf.limit = lim
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err := proto.MarshalText(buf, newTestMessage())
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// We expect a certain error, but also some partial results in the buffer.
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if err != outOfSpace {
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t.Errorf("Got:\n===\n%v===\nExpected:\n===\n%v===\n", err, outOfSpace)
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}
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s := buf.b.String()
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x := text[:buf.limit]
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if s != x {
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t.Errorf("Got:\n===\n%v===\nExpected:\n===\n%v===\n", s, x)
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}
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}
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}
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func TestFloats(t *testing.T) {
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tests := []struct {
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f float64
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want string
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}{
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{0, "0"},
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{4.7, "4.7"},
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{math.Inf(1), "inf"},
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{math.Inf(-1), "-inf"},
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{math.NaN(), "nan"},
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}
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for _, test := range tests {
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msg := &pb.FloatingPoint{F: &test.f}
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got := strings.TrimSpace(msg.String())
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want := `f:` + test.want
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if got != want {
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t.Errorf("f=%f: got %q, want %q", test.f, got, want)
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}
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}
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}
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func TestRepeatedNilText(t *testing.T) {
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m := &pb.MessageList{
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Message: []*pb.MessageList_Message{
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nil,
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&pb.MessageList_Message{
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Name: proto.String("Horse"),
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},
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nil,
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},
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}
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want := `Message <nil>
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Message {
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name: "Horse"
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}
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Message <nil>
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`
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if s := proto.MarshalTextString(m); s != want {
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t.Errorf(" got: %s\nwant: %s", s, want)
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}
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}
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func TestProto3Text(t *testing.T) {
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tests := []struct {
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m proto.Message
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want string
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}{
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// zero message
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{&proto3pb.Message{}, ``},
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// zero message except for an empty byte slice
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{&proto3pb.Message{Data: []byte{}}, ``},
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// trivial case
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{&proto3pb.Message{Name: "Rob", HeightInCm: 175}, `name:"Rob" height_in_cm:175`},
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// empty map
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{&pb.MessageWithMap{}, ``},
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// non-empty map; map format is the same as a repeated struct,
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// and they are sorted by key (numerically for numeric keys).
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{
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&pb.MessageWithMap{NameMapping: map[int32]string{
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-1: "Negatory",
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7: "Lucky",
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1234: "Feist",
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6345789: "Otis",
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}},
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`name_mapping:<key:-1 value:"Negatory" > ` +
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`name_mapping:<key:7 value:"Lucky" > ` +
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`name_mapping:<key:1234 value:"Feist" > ` +
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`name_mapping:<key:6345789 value:"Otis" >`,
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},
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// map with nil value; not well-defined, but we shouldn't crash
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{
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&pb.MessageWithMap{MsgMapping: map[int64]*pb.FloatingPoint{7: nil}},
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`msg_mapping:<key:7 >`,
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},
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}
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for _, test := range tests {
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got := strings.TrimSpace(test.m.String())
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if got != test.want {
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t.Errorf("\n got %s\nwant %s", got, test.want)
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}
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}
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}
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