stringertest.go

Documentation: github.com/gogo/protobuf/plugin/stringer

     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  
    29  package stringer
    30  
    31  import (
    32  	"github.com/gogo/protobuf/gogoproto"
    33  	"github.com/gogo/protobuf/plugin/testgen"
    34  	"github.com/gogo/protobuf/protoc-gen-gogo/generator"
    35  )
    36  
    37  type test struct {
    38  	*generator.Generator
    39  }
    40  
    41  func NewTest(g *generator.Generator) testgen.TestPlugin {
    42  	return &test{g}
    43  }
    44  
    45  func (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  	for _, message := range file.Messages() {
    52  		ccTypeName := generator.CamelCaseSlice(message.TypeName())
    53  		if !gogoproto.IsStringer(file.FileDescriptorProto, message.DescriptorProto) {
    54  			continue
    55  		}
    56  		if message.DescriptorProto.GetOptions().GetMapEntry() {
    57  			continue
    58  		}
    59  
    60  		if gogoproto.HasTestGen(file.FileDescriptorProto, message.DescriptorProto) {
    61  			used = true
    62  			p.P(`func Test`, ccTypeName, `Stringer(t *`, testingPkg.Use(), `.T) {`)
    63  			p.In()
    64  			p.P(`popr := `, randPkg.Use(), `.New(`, randPkg.Use(), `.NewSource(`, timePkg.Use(), `.Now().UnixNano()))`)
    65  			p.P(`p := NewPopulated`, ccTypeName, `(popr, false)`)
    66  			p.P(`s1 := p.String()`)
    67  			p.P(`s2 := `, fmtPkg.Use(), `.Sprintf("%v", p)`)
    68  			p.P(`if s1 != s2 {`)
    69  			p.In()
    70  			p.P(`t.Fatalf("String want %v got %v", s1, s2)`)
    71  			p.Out()
    72  			p.P(`}`)
    73  			p.Out()
    74  			p.P(`}`)
    75  		}
    76  
    77  	}
    78  	return used
    79  }
    80  
    81  func init() {
    82  	testgen.RegisterTestPlugin(NewTest)
    83  }
    84
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