1// Protocol Buffers for Go with Gadgets
2//
3// Copyright (c) 2013, The GoGo Authors. All rights reserved.
4// http://github.com/gogo/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//
17// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29package size
30
31import (
32	"github.com/gogo/protobuf/gogoproto"
33	"github.com/gogo/protobuf/plugin/testgen"
34	"github.com/gogo/protobuf/protoc-gen-gogo/generator"
35)
36
37type test struct {
38	*generator.Generator
39}
40
41func NewTest(g *generator.Generator) testgen.TestPlugin {
42	return &test{g}
43}
44
45func (p *test) Generate(imports generator.PluginImports, file *generator.FileDescriptor) bool {
46	used := false
47	randPkg := imports.NewImport("math/rand")
48	timePkg := imports.NewImport("time")
49	testingPkg := imports.NewImport("testing")
50	protoPkg := imports.NewImport("github.com/gogo/protobuf/proto")
51	if !gogoproto.ImportsGoGoProto(file.FileDescriptorProto) {
52		protoPkg = imports.NewImport("github.com/golang/protobuf/proto")
53	}
54	for _, message := range file.Messages() {
55		ccTypeName := generator.CamelCaseSlice(message.TypeName())
56		sizeName := ""
57		if gogoproto.IsSizer(file.FileDescriptorProto, message.DescriptorProto) {
58			sizeName = "Size"
59		} else if gogoproto.IsProtoSizer(file.FileDescriptorProto, message.DescriptorProto) {
60			sizeName = "ProtoSize"
61		} else {
62			continue
63		}
64		if message.DescriptorProto.GetOptions().GetMapEntry() {
65			continue
66		}
67
68		if gogoproto.HasTestGen(file.FileDescriptorProto, message.DescriptorProto) {
69			used = true
70			p.P(`func Test`, ccTypeName, sizeName, `(t *`, testingPkg.Use(), `.T) {`)
71			p.In()
72			p.P(`seed := `, timePkg.Use(), `.Now().UnixNano()`)
73			p.P(`popr := `, randPkg.Use(), `.New(`, randPkg.Use(), `.NewSource(seed))`)
74			p.P(`p := NewPopulated`, ccTypeName, `(popr, true)`)
75			p.P(`size2 := `, protoPkg.Use(), `.Size(p)`)
76			p.P(`dAtA, err := `, protoPkg.Use(), `.Marshal(p)`)
77			p.P(`if err != nil {`)
78			p.In()
79			p.P(`t.Fatalf("seed = %d, err = %v", seed, err)`)
80			p.Out()
81			p.P(`}`)
82			p.P(`size := p.`, sizeName, `()`)
83			p.P(`if len(dAtA) != size {`)
84			p.In()
85			p.P(`t.Errorf("seed = %d, size %v != marshalled size %v", seed, size, len(dAtA))`)
86			p.Out()
87			p.P(`}`)
88			p.P(`if size2 != size {`)
89			p.In()
90			p.P(`t.Errorf("seed = %d, size %v != before marshal proto.Size %v", seed, size, size2)`)
91			p.Out()
92			p.P(`}`)
93			p.P(`size3 := `, protoPkg.Use(), `.Size(p)`)
94			p.P(`if size3 != size {`)
95			p.In()
96			p.P(`t.Errorf("seed = %d, size %v != after marshal proto.Size %v", seed, size, size3)`)
97			p.Out()
98			p.P(`}`)
99			p.Out()
100			p.P(`}`)
101			p.P()
102		}
103
104		if gogoproto.HasBenchGen(file.FileDescriptorProto, message.DescriptorProto) {
105			used = true
106			p.P(`func Benchmark`, ccTypeName, sizeName, `(b *`, testingPkg.Use(), `.B) {`)
107			p.In()
108			p.P(`popr := `, randPkg.Use(), `.New(`, randPkg.Use(), `.NewSource(616))`)
109			p.P(`total := 0`)
110			p.P(`pops := make([]*`, ccTypeName, `, 1000)`)
111			p.P(`for i := 0; i < 1000; i++ {`)
112			p.In()
113			p.P(`pops[i] = NewPopulated`, ccTypeName, `(popr, false)`)
114			p.Out()
115			p.P(`}`)
116			p.P(`b.ResetTimer()`)
117			p.P(`for i := 0; i < b.N; i++ {`)
118			p.In()
119			p.P(`total += pops[i%1000].`, sizeName, `()`)
120			p.Out()
121			p.P(`}`)
122			p.P(`b.SetBytes(int64(total / b.N))`)
123			p.Out()
124			p.P(`}`)
125			p.P()
126		}
127
128	}
129	return used
130}
131
132func init() {
133	testgen.RegisterTestPlugin(NewTest)
134}
135