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1// Go support for Protocol Buffers - Google's data interchange format
2//
3// Copyright 2014 The Go Authors.  All rights reserved.
4// https://github.com/golang/protobuf
5//
6// Redistribution and use in source and binary forms, with or without
7// modification, are permitted provided that the following conditions are
8// met:
9//
10//     * Redistributions of source code must retain the above copyright
11// notice, this list of conditions and the following disclaimer.
12//     * Redistributions in binary form must reproduce the above
13// copyright notice, this list of conditions and the following disclaimer
14// in the documentation and/or other materials provided with the
15// distribution.
16//     * Neither the name of Google Inc. nor the names of its
17// contributors may be used to endorse or promote products derived from
18// this software without specific prior written permission.
19//
20// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31
32package proto_test
33
34import (
35	"bytes"
36	"testing"
37
38	"github.com/golang/protobuf/proto"
39	pb "github.com/golang/protobuf/proto/proto3_proto"
40	tpb "github.com/golang/protobuf/proto/test_proto"
41)
42
43func TestProto3ZeroValues(t *testing.T) {
44	tests := []struct {
45		desc string
46		m    proto.Message
47	}{
48		{"zero message", &pb.Message{}},
49		{"empty bytes field", &pb.Message{Data: []byte{}}},
50	}
51	for _, test := range tests {
52		b, err := proto.Marshal(test.m)
53		if err != nil {
54			t.Errorf("%s: proto.Marshal: %v", test.desc, err)
55			continue
56		}
57		if len(b) > 0 {
58			t.Errorf("%s: Encoding is non-empty: %q", test.desc, b)
59		}
60	}
61}
62
63func TestRoundTripProto3(t *testing.T) {
64	m := &pb.Message{
65		Name:         "David",          // (2 | 1<<3): 0x0a 0x05 "David"
66		Hilarity:     pb.Message_PUNS,  // (0 | 2<<3): 0x10 0x01
67		HeightInCm:   178,              // (0 | 3<<3): 0x18 0xb2 0x01
68		Data:         []byte("roboto"), // (2 | 4<<3): 0x20 0x06 "roboto"
69		ResultCount:  47,               // (0 | 7<<3): 0x38 0x2f
70		TrueScotsman: true,             // (0 | 8<<3): 0x40 0x01
71		Score:        8.1,              // (5 | 9<<3): 0x4d <8.1>
72
73		Key: []uint64{1, 0xdeadbeef},
74		Nested: &pb.Nested{
75			Bunny: "Monty",
76		},
77	}
78	t.Logf(" m: %v", m)
79
80	b, err := proto.Marshal(m)
81	if err != nil {
82		t.Fatalf("proto.Marshal: %v", err)
83	}
84	t.Logf(" b: %q", b)
85
86	m2 := new(pb.Message)
87	if err := proto.Unmarshal(b, m2); err != nil {
88		t.Fatalf("proto.Unmarshal: %v", err)
89	}
90	t.Logf("m2: %v", m2)
91
92	if !proto.Equal(m, m2) {
93		t.Errorf("proto.Equal returned false:\n m: %v\nm2: %v", m, m2)
94	}
95}
96
97func TestGettersForBasicTypesExist(t *testing.T) {
98	var m pb.Message
99	if got := m.GetNested().GetBunny(); got != "" {
100		t.Errorf("m.GetNested().GetBunny() = %q, want empty string", got)
101	}
102	if got := m.GetNested().GetCute(); got {
103		t.Errorf("m.GetNested().GetCute() = %t, want false", got)
104	}
105}
106
107func TestProto3SetDefaults(t *testing.T) {
108	in := &pb.Message{
109		Terrain: map[string]*pb.Nested{
110			"meadow": new(pb.Nested),
111		},
112		Proto2Field: new(tpb.SubDefaults),
113		Proto2Value: map[string]*tpb.SubDefaults{
114			"badlands": new(tpb.SubDefaults),
115		},
116	}
117
118	got := proto.Clone(in).(*pb.Message)
119	proto.SetDefaults(got)
120
121	// There are no defaults in proto3.  Everything should be the zero value, but
122	// we need to remember to set defaults for nested proto2 messages.
123	want := &pb.Message{
124		Terrain: map[string]*pb.Nested{
125			"meadow": new(pb.Nested),
126		},
127		Proto2Field: &tpb.SubDefaults{N: proto.Int64(7)},
128		Proto2Value: map[string]*tpb.SubDefaults{
129			"badlands": &tpb.SubDefaults{N: proto.Int64(7)},
130		},
131	}
132
133	if !proto.Equal(got, want) {
134		t.Errorf("with in = %v\nproto.SetDefaults(in) =>\ngot %v\nwant %v", in, got, want)
135	}
136}
137
138func TestUnknownFieldPreservation(t *testing.T) {
139	b1 := "\x0a\x05David"      // Known tag 1
140	b2 := "\xc2\x0c\x06Google" // Unknown tag 200
141	b := []byte(b1 + b2)
142
143	m := new(pb.Message)
144	if err := proto.Unmarshal(b, m); err != nil {
145		t.Fatalf("proto.Unmarshal: %v", err)
146	}
147
148	if !bytes.Equal(m.XXX_unrecognized, []byte(b2)) {
149		t.Fatalf("mismatching unknown fields:\ngot  %q\nwant %q", m.XXX_unrecognized, b2)
150	}
151}
152