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 gostring
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	fmtPkg := imports.NewImport("fmt")
51	parserPkg := imports.NewImport("go/parser")
52	for _, message := range file.Messages() {
53		ccTypeName := generator.CamelCaseSlice(message.TypeName())
54		if !gogoproto.HasGoString(file.FileDescriptorProto, message.DescriptorProto) {
55			continue
56		}
57		if message.DescriptorProto.GetOptions().GetMapEntry() {
58			continue
59		}
60
61		if gogoproto.HasTestGen(file.FileDescriptorProto, message.DescriptorProto) {
62			used = true
63			p.P(`func Test`, ccTypeName, `GoString(t *`, testingPkg.Use(), `.T) {`)
64			p.In()
65			p.P(`popr := `, randPkg.Use(), `.New(`, randPkg.Use(), `.NewSource(`, timePkg.Use(), `.Now().UnixNano()))`)
66			p.P(`p := NewPopulated`, ccTypeName, `(popr, false)`)
67			p.P(`s1 := p.GoString()`)
68			p.P(`s2 := `, fmtPkg.Use(), `.Sprintf("%#v", p)`)
69			p.P(`if s1 != s2 {`)
70			p.In()
71			p.P(`t.Fatalf("GoString want %v got %v", s1, s2)`)
72			p.Out()
73			p.P(`}`)
74			p.P(`_, err := `, parserPkg.Use(), `.ParseExpr(s1)`)
75			p.P(`if err != nil {`)
76			p.In()
77			p.P(`t.Fatal(err)`)
78			p.Out()
79			p.P(`}`)
80			p.Out()
81			p.P(`}`)
82		}
83
84	}
85	return used
86}
87
88func init() {
89	testgen.RegisterTestPlugin(NewTest)
90}
91