equaltest.go

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

     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 equal
    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  	protoPkg := imports.NewImport("github.com/gogo/protobuf/proto")
    51  	unsafePkg := imports.NewImport("unsafe")
    52  	if !gogoproto.ImportsGoGoProto(file.FileDescriptorProto) {
    53  		protoPkg = imports.NewImport("github.com/golang/protobuf/proto")
    54  	}
    55  	for _, message := range file.Messages() {
    56  		ccTypeName := generator.CamelCaseSlice(message.TypeName())
    57  		if !gogoproto.HasVerboseEqual(file.FileDescriptorProto, message.DescriptorProto) {
    58  			continue
    59  		}
    60  		if message.DescriptorProto.GetOptions().GetMapEntry() {
    61  			continue
    62  		}
    63  
    64  		if gogoproto.HasTestGen(file.FileDescriptorProto, message.DescriptorProto) {
    65  			used = true
    66  			hasUnsafe := gogoproto.IsUnsafeMarshaler(file.FileDescriptorProto, message.DescriptorProto) ||
    67  				gogoproto.IsUnsafeUnmarshaler(file.FileDescriptorProto, message.DescriptorProto)
    68  			p.P(`func Test`, ccTypeName, `VerboseEqual(t *`, testingPkg.Use(), `.T) {`)
    69  			p.In()
    70  			if hasUnsafe {
    71  				if hasUnsafe {
    72  					p.P(`var bigendian uint32 = 0x01020304`)
    73  					p.P(`if *(*byte)(`, unsafePkg.Use(), `.Pointer(&bigendian)) == 1 {`)
    74  					p.In()
    75  					p.P(`t.Skip("unsafe does not work on big endian architectures")`)
    76  					p.Out()
    77  					p.P(`}`)
    78  				}
    79  			}
    80  			p.P(`popr := `, randPkg.Use(), `.New(`, randPkg.Use(), `.NewSource(`, timePkg.Use(), `.Now().UnixNano()))`)
    81  			p.P(`p := NewPopulated`, ccTypeName, `(popr, false)`)
    82  			p.P(`dAtA, err := `, protoPkg.Use(), `.Marshal(p)`)
    83  			p.P(`if err != nil {`)
    84  			p.In()
    85  			p.P(`panic(err)`)
    86  			p.Out()
    87  			p.P(`}`)
    88  			p.P(`msg := &`, ccTypeName, `{}`)
    89  			p.P(`if err := `, protoPkg.Use(), `.Unmarshal(dAtA, msg); err != nil {`)
    90  			p.In()
    91  			p.P(`panic(err)`)
    92  			p.Out()
    93  			p.P(`}`)
    94  			p.P(`if err := p.VerboseEqual(msg); err != nil {`)
    95  			p.In()
    96  			p.P(`t.Fatalf("%#v !VerboseEqual %#v, since %v", msg, p, err)`)
    97  			p.Out()
    98  			p.P(`}`)
    99  			p.Out()
   100  			p.P(`}`)
   101  		}
   102  
   103  	}
   104  	return used
   105  }
   106  
   107  func init() {
   108  	testgen.RegisterTestPlugin(NewTest)
   109  }
   110
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