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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 protogen
import (
"flag"
"fmt"
"testing"
"github.com/google/go-cmp/cmp"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/reflect/protoreflect"
"google.golang.org/protobuf/types/descriptorpb"
"google.golang.org/protobuf/types/pluginpb"
)
func init() {
warnings = false // avoid spam in tests
}
func TestPluginParameters(t *testing.T) {
var flags flag.FlagSet
value := flags.Int("integer", 0, "")
const params = "integer=2"
_, err := Options{
ParamFunc: flags.Set,
}.New(&pluginpb.CodeGeneratorRequest{
Parameter: proto.String(params),
})
if err != nil {
t.Errorf("New(generator parameters %q): %v", params, err)
}
if *value != 2 {
t.Errorf("New(generator parameters %q): integer=%v, want 2", params, *value)
}
}
func TestPluginParameterErrors(t *testing.T) {
for _, parameter := range []string{
"unknown=1",
"boolean=error",
} {
var flags flag.FlagSet
flags.Bool("boolean", false, "")
_, err := Options{
ParamFunc: flags.Set,
}.New(&pluginpb.CodeGeneratorRequest{
Parameter: proto.String(parameter),
})
if err == nil {
t.Errorf("New(generator parameters %q): want error, got nil", parameter)
}
}
}
func TestNoGoPackage(t *testing.T) {
gen, err := Options{}.New(&pluginpb.CodeGeneratorRequest{
ProtoFile: []*descriptorpb.FileDescriptorProto{
{
Name: proto.String("testdata/go_package/no_go_package.proto"),
Syntax: proto.String(protoreflect.Proto3.String()),
Package: proto.String("goproto.testdata"),
},
{
Name: proto.String("testdata/go_package/no_go_package_import.proto"),
Syntax: proto.String(protoreflect.Proto3.String()),
Package: proto.String("goproto.testdata"),
Dependency: []string{"testdata/go_package/no_go_package.proto"},
},
},
})
if err != nil {
t.Fatal(err)
}
for i, f := range gen.Files {
if got, want := string(f.GoPackageName), "goproto_testdata"; got != want {
t.Errorf("gen.Files[%d].GoPackageName = %v, want %v", i, got, want)
}
if got, want := string(f.GoImportPath), "testdata/go_package"; got != want {
t.Errorf("gen.Files[%d].GoImportPath = %v, want %v", i, got, want)
}
}
}
func TestPackageNamesAndPaths(t *testing.T) {
const (
filename = "dir/filename.proto"
protoPackageName = "proto.package"
)
for _, test := range []struct {
desc string
parameter string
goPackageOption string
generate bool
wantPackageName GoPackageName
wantImportPath GoImportPath
wantFilenamePrefix string
}{
{
desc: "no parameters, no go_package option",
generate: true,
wantPackageName: "proto_package",
wantImportPath: "dir",
wantFilenamePrefix: "dir/filename",
},
{
desc: "go_package option sets import path",
goPackageOption: "golang.org/x/foo",
generate: true,
wantPackageName: "foo",
wantImportPath: "golang.org/x/foo",
wantFilenamePrefix: "golang.org/x/foo/filename",
},
{
desc: "go_package option sets import path and package",
goPackageOption: "golang.org/x/foo;bar",
generate: true,
wantPackageName: "bar",
wantImportPath: "golang.org/x/foo",
wantFilenamePrefix: "golang.org/x/foo/filename",
},
{
desc: "go_package option sets package",
goPackageOption: "foo",
generate: true,
wantPackageName: "foo",
wantImportPath: "dir",
wantFilenamePrefix: "dir/filename",
},
{
desc: "command line sets import path for a file",
parameter: "Mdir/filename.proto=golang.org/x/bar",
goPackageOption: "golang.org/x/foo",
generate: true,
wantPackageName: "foo",
wantImportPath: "golang.org/x/bar",
wantFilenamePrefix: "golang.org/x/foo/filename",
},
{
desc: "import_path parameter sets import path of generated files",
parameter: "import_path=golang.org/x/bar",
goPackageOption: "golang.org/x/foo",
generate: true,
wantPackageName: "foo",
wantImportPath: "golang.org/x/bar",
wantFilenamePrefix: "golang.org/x/foo/filename",
},
{
desc: "import_path parameter does not set import path of dependencies",
parameter: "import_path=golang.org/x/bar",
goPackageOption: "golang.org/x/foo",
generate: false,
wantPackageName: "foo",
wantImportPath: "golang.org/x/foo",
wantFilenamePrefix: "golang.org/x/foo/filename",
},
{
desc: "paths=import uses import path from command line",
parameter: "paths=import,Mdir/filename.proto=golang.org/x/bar",
goPackageOption: "golang.org/x/foo",
generate: true,
wantPackageName: "foo",
wantImportPath: "golang.org/x/bar",
wantFilenamePrefix: "golang.org/x/bar/filename",
},
} {
context := fmt.Sprintf(`
TEST: %v
--go_out=%v:.
file %q: generate=%v
option go_package = %q;
`,
test.desc, test.parameter, filename, test.generate, test.goPackageOption)
req := &pluginpb.CodeGeneratorRequest{
Parameter: proto.String(test.parameter),
ProtoFile: []*descriptorpb.FileDescriptorProto{
{
Name: proto.String(filename),
Package: proto.String(protoPackageName),
Options: &descriptorpb.FileOptions{
GoPackage: proto.String(test.goPackageOption),
},
},
},
}
if test.generate {
req.FileToGenerate = []string{filename}
}
gen, err := Options{}.New(req)
if err != nil {
t.Errorf("%vNew(req) = %v", context, err)
continue
}
gotFile, ok := gen.FilesByPath[filename]
if !ok {
t.Errorf("%v%v: missing file info", context, filename)
continue
}
if got, want := gotFile.GoPackageName, test.wantPackageName; got != want {
t.Errorf("%vGoPackageName=%v, want %v", context, got, want)
}
if got, want := gotFile.GoImportPath, test.wantImportPath; got != want {
t.Errorf("%vGoImportPath=%v, want %v", context, got, want)
}
if got, want := gotFile.GeneratedFilenamePrefix, test.wantFilenamePrefix; got != want {
t.Errorf("%vGeneratedFilenamePrefix=%v, want %v", context, got, want)
}
}
}
func TestPackageNameInference(t *testing.T) {
gen, err := Options{}.New(&pluginpb.CodeGeneratorRequest{
ProtoFile: []*descriptorpb.FileDescriptorProto{
{
Name: proto.String("dir/file1.proto"),
Package: proto.String("proto.package"),
},
{
Name: proto.String("dir/file2.proto"),
Package: proto.String("proto.package"),
Options: &descriptorpb.FileOptions{
GoPackage: proto.String("foo"),
},
},
},
FileToGenerate: []string{"dir/file1.proto", "dir/file2.proto"},
})
if err != nil {
t.Fatalf("New(req) = %v", err)
}
if f1, ok := gen.FilesByPath["dir/file1.proto"]; !ok {
t.Errorf("missing file info for dir/file1.proto")
} else if f1.GoPackageName != "foo" {
t.Errorf("dir/file1.proto: GoPackageName=%v, want foo; package name should be derived from dir/file2.proto", f1.GoPackageName)
}
}
func TestInconsistentPackageNames(t *testing.T) {
_, err := Options{}.New(&pluginpb.CodeGeneratorRequest{
ProtoFile: []*descriptorpb.FileDescriptorProto{
{
Name: proto.String("dir/file1.proto"),
Package: proto.String("proto.package"),
Options: &descriptorpb.FileOptions{
GoPackage: proto.String("golang.org/x/foo"),
},
},
{
Name: proto.String("dir/file2.proto"),
Package: proto.String("proto.package"),
Options: &descriptorpb.FileOptions{
GoPackage: proto.String("golang.org/x/foo;bar"),
},
},
},
FileToGenerate: []string{"dir/file1.proto", "dir/file2.proto"},
})
if err == nil {
t.Fatalf("inconsistent package names for the same import path: New(req) = nil, want error")
}
}
func TestImports(t *testing.T) {
gen, err := Options{}.New(&pluginpb.CodeGeneratorRequest{})
if err != nil {
t.Fatal(err)
}
g := gen.NewGeneratedFile("foo.go", "golang.org/x/foo")
g.P("package foo")
g.P()
for _, importPath := range []GoImportPath{
"golang.org/x/foo",
// Multiple references to the same package.
"golang.org/x/bar",
"golang.org/x/bar",
// Reference to a different package with the same basename.
"golang.org/y/bar",
"golang.org/x/baz",
// Reference to a package conflicting with a predeclared identifier.
"golang.org/z/string",
} {
g.P("var _ = ", GoIdent{GoName: "X", GoImportPath: importPath}, " // ", importPath)
}
want := `package foo
import (
bar "golang.org/x/bar"
baz "golang.org/x/baz"
bar1 "golang.org/y/bar"
string1 "golang.org/z/string"
)
var _ = X // "golang.org/x/foo"
var _ = bar.X // "golang.org/x/bar"
var _ = bar.X // "golang.org/x/bar"
var _ = bar1.X // "golang.org/y/bar"
var _ = baz.X // "golang.org/x/baz"
var _ = string1.X // "golang.org/z/string"
`
got, err := g.Content()
if err != nil {
t.Fatalf("g.Content() = %v", err)
}
if diff := cmp.Diff(string(want), string(got)); diff != "" {
t.Fatalf("content mismatch (-want +got):\n%s", diff)
}
}
func TestImportRewrites(t *testing.T) {
gen, err := Options{
ImportRewriteFunc: func(i GoImportPath) GoImportPath {
return "prefix/" + i
},
}.New(&pluginpb.CodeGeneratorRequest{})
if err != nil {
t.Fatal(err)
}
g := gen.NewGeneratedFile("foo.go", "golang.org/x/foo")
g.P("package foo")
g.P("var _ = ", GoIdent{GoName: "X", GoImportPath: "golang.org/x/bar"})
want := `package foo
import (
bar "prefix/golang.org/x/bar"
)
var _ = bar.X
`
got, err := g.Content()
if err != nil {
t.Fatalf("g.Content() = %v", err)
}
if diff := cmp.Diff(string(want), string(got)); diff != "" {
t.Fatalf("content mismatch (-want +got):\n%s", diff)
}
}