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// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"bytes"
"io/ioutil"
"testing"
"google.golang.org/protobuf/encoding/prototext"
"google.golang.org/protobuf/internal/genid"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/types/descriptorpb"
)
func TestAnnotations(t *testing.T) {
sourceFile, err := ioutil.ReadFile("testdata/annotations/annotations.pb.go")
if err != nil {
t.Fatal(err)
}
metaFile, err := ioutil.ReadFile("testdata/annotations/annotations.pb.go.meta")
if err != nil {
t.Fatal(err)
}
gotInfo := &descriptorpb.GeneratedCodeInfo{}
if err := prototext.Unmarshal(metaFile, gotInfo); err != nil {
t.Fatalf("can't parse meta file: %v", err)
}
wantInfo := &descriptorpb.GeneratedCodeInfo{}
for _, want := range []struct {
prefix, text, suffix string
path []int32
}{{
"type ", "AnnotationsTestEnum", " int32",
[]int32{int32(genid.FileDescriptorProto_EnumType_field_number), 0},
}, {
"\t", "AnnotationsTestEnum_ANNOTATIONS_TEST_ENUM_VALUE", " AnnotationsTestEnum = 0",
[]int32{int32(genid.FileDescriptorProto_EnumType_field_number), 0, int32(genid.EnumDescriptorProto_Value_field_number), 0},
}, {
"type ", "AnnotationsTestMessage", " struct {",
[]int32{int32(genid.FileDescriptorProto_MessageType_field_number), 0},
}, {
"\t", "AnnotationsTestField", " ",
[]int32{int32(genid.FileDescriptorProto_MessageType_field_number), 0, int32(genid.DescriptorProto_Field_field_number), 0},
}, {
"func (x *AnnotationsTestMessage) ", "GetAnnotationsTestField", "() string {",
[]int32{int32(genid.FileDescriptorProto_MessageType_field_number), 0, int32(genid.DescriptorProto_Field_field_number), 0},
}} {
s := want.prefix + want.text + want.suffix
pos := bytes.Index(sourceFile, []byte(s))
if pos < 0 {
t.Errorf("source file does not contain: %v", s)
continue
}
begin := pos + len(want.prefix)
end := begin + len(want.text)
wantInfo.Annotation = append(wantInfo.Annotation, &descriptorpb.GeneratedCodeInfo_Annotation{
Path: want.path,
Begin: proto.Int32(int32(begin)),
End: proto.Int32(int32(end)),
SourceFile: proto.String("cmd/protoc-gen-go/testdata/annotations/annotations.proto"),
})
}
if !proto.Equal(gotInfo, wantInfo) {
t.Errorf("unexpected annotations for annotations.proto; got:\n%v\nwant:\n%v", gotInfo, wantInfo)
}
}
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