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      1 package descriptor_test
      2 
      3 import (
      4 	"fmt"
      5 	"testing"
      6 
      7 	"github.com/golang/protobuf/descriptor"
      8 	tpb "github.com/golang/protobuf/proto/test_proto"
      9 	protobuf "github.com/golang/protobuf/protoc-gen-go/descriptor"
     10 )
     11 
     12 func TestMessage(t *testing.T) {
     13 	var msg *protobuf.DescriptorProto
     14 	fd, md := descriptor.ForMessage(msg)
     15 	if pkg, want := fd.GetPackage(), "google.protobuf"; pkg != want {
     16 		t.Errorf("descriptor.ForMessage(%T).GetPackage() = %q; want %q", msg, pkg, want)
     17 	}
     18 	if name, want := md.GetName(), "DescriptorProto"; name != want {
     19 		t.Fatalf("descriptor.ForMessage(%T).GetName() = %q; want %q", msg, name, want)
     20 	}
     21 }
     22 
     23 func Example_options() {
     24 	var msg *tpb.MyMessageSet
     25 	_, md := descriptor.ForMessage(msg)
     26 	if md.GetOptions().GetMessageSetWireFormat() {
     27 		fmt.Printf("%v uses option message_set_wire_format.\n", md.GetName())
     28 	}
     29 
     30 	// Output:
     31 	// MyMessageSet uses option message_set_wire_format.
     32 }
     33