1 // Go support for Protocol Buffers - Google's data interchange format
3 // Copyright 2014 The Go Authors. All rights reserved.
4 // https://github.com/golang/protobuf
6 // Redistribution and use in source and binary forms, with or without
7 // modification, are permitted provided that the following conditions are
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
16 // * Neither the name of Google Inc. nor the names of its
17 // contributors may be used to endorse or promote products derived from
18 // this software without specific prior written permission.
20 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
43 "github.com/gogo/protobuf/proto"
44 pb "github.com/gogo/protobuf/proto/test_proto"
47 func TestGetExtensionsWithMissingExtensions(t *testing.T) {
48 msg := &pb.MyMessage{}
50 if err := proto.SetExtension(msg, pb.E_Ext_More, ext1); err != nil {
51 t.Fatalf("Could not set ext1: %s", err)
53 exts, err := proto.GetExtensions(msg, []*proto.ExtensionDesc{
58 t.Fatalf("GetExtensions() failed: %s", err)
61 t.Errorf("ext1 not in returned extensions: %T %v", exts[0], exts[0])
64 t.Errorf("ext2 in returned extensions: %T %v", exts[1], exts[1])
68 func TestGetExtensionWithEmptyBuffer(t *testing.T) {
69 // Make sure that GetExtension returns an error if its
70 // undecoded buffer is empty.
71 msg := &pb.MyMessage{}
72 proto.SetRawExtension(msg, pb.E_Ext_More.Field, []byte{})
73 _, err := proto.GetExtension(msg, pb.E_Ext_More)
74 if want := io.ErrUnexpectedEOF; err != want {
75 t.Errorf("unexpected error in GetExtension from empty buffer: got %v, want %v", err, want)
79 func TestGetExtensionForIncompleteDesc(t *testing.T) {
80 msg := &pb.MyMessage{Count: proto.Int32(0)}
81 extdesc1 := &proto.ExtensionDesc{
82 ExtendedType: (*pb.MyMessage)(nil),
83 ExtensionType: (*bool)(nil),
86 Tag: "varint,123456789,opt",
88 ext1 := proto.Bool(true)
89 if err := proto.SetExtension(msg, extdesc1, ext1); err != nil {
90 t.Fatalf("Could not set ext1: %s", err)
92 extdesc2 := &proto.ExtensionDesc{
93 ExtendedType: (*pb.MyMessage)(nil),
94 ExtensionType: ([]byte)(nil),
97 Tag: "bytes,123456790,opt",
99 ext2 := []byte{0, 1, 2, 3, 4, 5, 6, 7}
100 if err := proto.SetExtension(msg, extdesc2, ext2); err != nil {
101 t.Fatalf("Could not set ext2: %s", err)
103 extdesc3 := &proto.ExtensionDesc{
104 ExtendedType: (*pb.MyMessage)(nil),
105 ExtensionType: (*pb.Ext)(nil),
108 Tag: "bytes,123456791,opt",
110 ext3 := &pb.Ext{Data: proto.String("foo")}
111 if err := proto.SetExtension(msg, extdesc3, ext3); err != nil {
112 t.Fatalf("Could not set ext3: %s", err)
115 b, err := proto.Marshal(msg)
117 t.Fatalf("Could not marshal msg: %v", err)
119 if err := proto.Unmarshal(b, msg); err != nil {
120 t.Fatalf("Could not unmarshal into msg: %v", err)
123 var expected proto.Buffer
124 if err := expected.EncodeVarint(uint64((extdesc1.Field << 3) | proto.WireVarint)); err != nil {
125 t.Fatalf("failed to compute expected prefix for ext1: %s", err)
127 if err := expected.EncodeVarint(1 /* bool true */); err != nil {
128 t.Fatalf("failed to compute expected value for ext1: %s", err)
131 if b, err := proto.GetExtension(msg, &proto.ExtensionDesc{Field: extdesc1.Field}); err != nil {
132 t.Fatalf("Failed to get raw value for ext1: %s", err)
133 } else if !reflect.DeepEqual(b, expected.Bytes()) {
134 t.Fatalf("Raw value for ext1: got %v, want %v", b, expected.Bytes())
137 expected = proto.Buffer{} // reset
138 if err := expected.EncodeVarint(uint64((extdesc2.Field << 3) | proto.WireBytes)); err != nil {
139 t.Fatalf("failed to compute expected prefix for ext2: %s", err)
141 if err := expected.EncodeRawBytes(ext2); err != nil {
142 t.Fatalf("failed to compute expected value for ext2: %s", err)
145 if b, err := proto.GetExtension(msg, &proto.ExtensionDesc{Field: extdesc2.Field}); err != nil {
146 t.Fatalf("Failed to get raw value for ext2: %s", err)
147 } else if !reflect.DeepEqual(b, expected.Bytes()) {
148 t.Fatalf("Raw value for ext2: got %v, want %v", b, expected.Bytes())
151 expected = proto.Buffer{} // reset
152 if err := expected.EncodeVarint(uint64((extdesc3.Field << 3) | proto.WireBytes)); err != nil {
153 t.Fatalf("failed to compute expected prefix for ext3: %s", err)
155 if b, err := proto.Marshal(ext3); err != nil {
156 t.Fatalf("failed to compute expected value for ext3: %s", err)
157 } else if err := expected.EncodeRawBytes(b); err != nil {
158 t.Fatalf("failed to compute expected value for ext3: %s", err)
161 if b, err := proto.GetExtension(msg, &proto.ExtensionDesc{Field: extdesc3.Field}); err != nil {
162 t.Fatalf("Failed to get raw value for ext3: %s", err)
163 } else if !reflect.DeepEqual(b, expected.Bytes()) {
164 t.Fatalf("Raw value for ext3: got %v, want %v", b, expected.Bytes())
168 func TestExtensionDescsWithUnregisteredExtensions(t *testing.T) {
169 msg := &pb.MyMessage{Count: proto.Int32(0)}
170 extdesc1 := pb.E_Ext_More
171 if descs, err := proto.ExtensionDescs(msg); len(descs) != 0 || err != nil {
172 t.Errorf("proto.ExtensionDescs: got %d descs, error %v; want 0, nil", len(descs), err)
176 if err := proto.SetExtension(msg, extdesc1, ext1); err != nil {
177 t.Fatalf("Could not set ext1: %s", err)
179 extdesc2 := &proto.ExtensionDesc{
180 ExtendedType: (*pb.MyMessage)(nil),
181 ExtensionType: (*bool)(nil),
184 Tag: "varint,123456789,opt",
186 ext2 := proto.Bool(false)
187 if err := proto.SetExtension(msg, extdesc2, ext2); err != nil {
188 t.Fatalf("Could not set ext2: %s", err)
191 b, err := proto.Marshal(msg)
193 t.Fatalf("Could not marshal msg: %v", err)
195 if err = proto.Unmarshal(b, msg); err != nil {
196 t.Fatalf("Could not unmarshal into msg: %v", err)
199 descs, err := proto.ExtensionDescs(msg)
201 t.Fatalf("proto.ExtensionDescs: got error %v", err)
204 wantDescs := []*proto.ExtensionDesc{extdesc1, {Field: extdesc2.Field}}
205 if !reflect.DeepEqual(descs, wantDescs) {
206 t.Errorf("proto.ExtensionDescs(msg) sorted extension ids: got %+v, want %+v", descs, wantDescs)
210 type ExtensionDescSlice []*proto.ExtensionDesc
212 func (s ExtensionDescSlice) Len() int { return len(s) }
213 func (s ExtensionDescSlice) Less(i, j int) bool { return s[i].Field < s[j].Field }
214 func (s ExtensionDescSlice) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
216 func sortExtDescs(s []*proto.ExtensionDesc) {
217 sort.Sort(ExtensionDescSlice(s))
220 func TestGetExtensionStability(t *testing.T) {
221 check := func(m *pb.MyMessage) bool {
222 ext1, err := proto.GetExtension(m, pb.E_Ext_More)
224 t.Fatalf("GetExtension() failed: %s", err)
226 ext2, err := proto.GetExtension(m, pb.E_Ext_More)
228 t.Fatalf("GetExtension() failed: %s", err)
232 msg := &pb.MyMessage{Count: proto.Int32(4)}
234 if err := proto.SetExtension(msg, pb.E_Ext_More, ext0); err != nil {
235 t.Fatalf("Could not set ext1: %s", ext0)
238 t.Errorf("GetExtension() not stable before marshaling")
240 bb, err := proto.Marshal(msg)
242 t.Fatalf("Marshal() failed: %s", err)
244 msg1 := &pb.MyMessage{}
245 err = proto.Unmarshal(bb, msg1)
247 t.Fatalf("Unmarshal() failed: %s", err)
250 t.Errorf("GetExtension() not stable after unmarshaling")
254 func TestGetExtensionDefaults(t *testing.T) {
255 var setFloat64 float64 = 1
256 var setFloat32 float32 = 2
257 var setInt32 int32 = 3
258 var setInt64 int64 = 4
259 var setUint32 uint32 = 5
260 var setUint64 uint64 = 6
263 var setString = "Goodnight string"
264 var setBytes = []byte("Goodnight bytes")
265 var setEnum = pb.DefaultsMessage_TWO
267 type testcase struct {
268 ext *proto.ExtensionDesc // Extension we are testing.
269 want interface{} // Expected value of extension, or nil (meaning that GetExtension will fail).
270 def interface{} // Expected value of extension after ClearExtension().
273 {pb.E_NoDefaultDouble, setFloat64, nil},
274 {pb.E_NoDefaultFloat, setFloat32, nil},
275 {pb.E_NoDefaultInt32, setInt32, nil},
276 {pb.E_NoDefaultInt64, setInt64, nil},
277 {pb.E_NoDefaultUint32, setUint32, nil},
278 {pb.E_NoDefaultUint64, setUint64, nil},
279 {pb.E_NoDefaultSint32, setInt32, nil},
280 {pb.E_NoDefaultSint64, setInt64, nil},
281 {pb.E_NoDefaultFixed32, setUint32, nil},
282 {pb.E_NoDefaultFixed64, setUint64, nil},
283 {pb.E_NoDefaultSfixed32, setInt32, nil},
284 {pb.E_NoDefaultSfixed64, setInt64, nil},
285 {pb.E_NoDefaultBool, setBool, nil},
286 {pb.E_NoDefaultBool, setBool2, nil},
287 {pb.E_NoDefaultString, setString, nil},
288 {pb.E_NoDefaultBytes, setBytes, nil},
289 {pb.E_NoDefaultEnum, setEnum, nil},
290 {pb.E_DefaultDouble, setFloat64, float64(3.1415)},
291 {pb.E_DefaultFloat, setFloat32, float32(3.14)},
292 {pb.E_DefaultInt32, setInt32, int32(42)},
293 {pb.E_DefaultInt64, setInt64, int64(43)},
294 {pb.E_DefaultUint32, setUint32, uint32(44)},
295 {pb.E_DefaultUint64, setUint64, uint64(45)},
296 {pb.E_DefaultSint32, setInt32, int32(46)},
297 {pb.E_DefaultSint64, setInt64, int64(47)},
298 {pb.E_DefaultFixed32, setUint32, uint32(48)},
299 {pb.E_DefaultFixed64, setUint64, uint64(49)},
300 {pb.E_DefaultSfixed32, setInt32, int32(50)},
301 {pb.E_DefaultSfixed64, setInt64, int64(51)},
302 {pb.E_DefaultBool, setBool, true},
303 {pb.E_DefaultBool, setBool2, true},
304 {pb.E_DefaultString, setString, "Hello, string,def=foo"},
305 {pb.E_DefaultBytes, setBytes, []byte("Hello, bytes")},
306 {pb.E_DefaultEnum, setEnum, pb.DefaultsMessage_ONE},
309 checkVal := func(test testcase, msg *pb.DefaultsMessage, valWant interface{}) error {
310 val, err := proto.GetExtension(msg, test.ext)
313 return fmt.Errorf("GetExtension(): %s", err)
315 if want := proto.ErrMissingExtension; err != want {
316 return fmt.Errorf("Unexpected error: got %v, want %v", err, want)
321 // All proto2 extension values are either a pointer to a value or a slice of values.
322 ty := reflect.TypeOf(val)
323 tyWant := reflect.TypeOf(test.ext.ExtensionType)
324 if got, want := ty, tyWant; got != want {
325 return fmt.Errorf("unexpected reflect.TypeOf(): got %v want %v", got, want)
328 tyeWant := tyWant.Elem()
329 if got, want := tye, tyeWant; got != want {
330 return fmt.Errorf("unexpected reflect.TypeOf().Elem(): got %v want %v", got, want)
333 // Check the name of the type of the value.
334 // If it is an enum it will be type int32 with the name of the enum.
335 if got, want := tye.Name(), tye.Name(); got != want {
336 return fmt.Errorf("unexpected reflect.TypeOf().Elem().Name(): got %v want %v", got, want)
339 // Check that value is what we expect.
340 // If we have a pointer in val, get the value it points to.
342 if ty.Kind() == reflect.Ptr {
343 valExp = reflect.ValueOf(val).Elem().Interface()
345 if got, want := valExp, valWant; !reflect.DeepEqual(got, want) {
346 return fmt.Errorf("unexpected reflect.DeepEqual(): got %v want %v", got, want)
352 setTo := func(test testcase) interface{} {
353 setTo := reflect.ValueOf(test.want)
354 if typ := reflect.TypeOf(test.ext.ExtensionType); typ.Kind() == reflect.Ptr {
355 setTo = reflect.New(typ).Elem()
356 setTo.Set(reflect.New(setTo.Type().Elem()))
357 setTo.Elem().Set(reflect.ValueOf(test.want))
359 return setTo.Interface()
362 for _, test := range tests {
363 msg := &pb.DefaultsMessage{}
364 name := test.ext.Name
366 // Check the initial value.
367 if err := checkVal(test, msg, test.def); err != nil {
368 t.Errorf("%s: %v", name, err)
371 // Set the per-type value and check value.
372 name = fmt.Sprintf("%s (set to %T %v)", name, test.want, test.want)
373 if err := proto.SetExtension(msg, test.ext, setTo(test)); err != nil {
374 t.Errorf("%s: SetExtension(): %v", name, err)
377 if err := checkVal(test, msg, test.want); err != nil {
378 t.Errorf("%s: %v", name, err)
382 // Set and check the value.
384 proto.ClearExtension(msg, test.ext)
385 if err := checkVal(test, msg, test.def); err != nil {
386 t.Errorf("%s: %v", name, err)
391 func TestNilMessage(t *testing.T) {
392 name := "nil interface"
393 if got, err := proto.GetExtension(nil, pb.E_Ext_More); err == nil {
394 t.Errorf("%s: got %T %v, expected to fail", name, got, got)
395 } else if !strings.Contains(err.Error(), "extendable") {
396 t.Errorf("%s: got error %v, expected not-extendable error", name, err)
399 // Regression tests: all functions of the Extension API
400 // used to panic when passed (*M)(nil), where M is a concrete message
401 // type. Now they handle this gracefully as a no-op or reported error.
402 var nilMsg *pb.MyMessage
403 desc := pb.E_Ext_More
405 isNotExtendable := func(err error) bool {
406 return strings.Contains(fmt.Sprint(err), "not extendable")
409 if proto.HasExtension(nilMsg, desc) {
410 t.Error("HasExtension(nil) = true")
413 if _, err := proto.GetExtensions(nilMsg, []*proto.ExtensionDesc{desc}); !isNotExtendable(err) {
414 t.Errorf("GetExtensions(nil) = %q (wrong error)", err)
417 if _, err := proto.ExtensionDescs(nilMsg); !isNotExtendable(err) {
418 t.Errorf("ExtensionDescs(nil) = %q (wrong error)", err)
421 if err := proto.SetExtension(nilMsg, desc, nil); !isNotExtendable(err) {
422 t.Errorf("SetExtension(nil) = %q (wrong error)", err)
425 proto.ClearExtension(nilMsg, desc) // no-op
426 proto.ClearAllExtensions(nilMsg) // no-op
429 func TestExtensionsRoundTrip(t *testing.T) {
430 msg := &pb.MyMessage{}
432 Data: proto.String("hi"),
435 Data: proto.String("there"),
437 exists := proto.HasExtension(msg, pb.E_Ext_More)
439 t.Error("Extension More present unexpectedly")
441 if err := proto.SetExtension(msg, pb.E_Ext_More, ext1); err != nil {
444 if err := proto.SetExtension(msg, pb.E_Ext_More, ext2); err != nil {
447 e, err := proto.GetExtension(msg, pb.E_Ext_More)
453 t.Errorf("e has type %T, expected test_proto.Ext", e)
454 } else if *x.Data != "there" {
455 t.Errorf("SetExtension failed to overwrite, got %+v, not 'there'", x)
457 proto.ClearExtension(msg, pb.E_Ext_More)
458 if _, err = proto.GetExtension(msg, pb.E_Ext_More); err != proto.ErrMissingExtension {
459 t.Errorf("got %v, expected ErrMissingExtension", e)
461 if _, err := proto.GetExtension(msg, pb.E_X215); err == nil {
462 t.Error("expected bad extension error, got nil")
464 if err := proto.SetExtension(msg, pb.E_X215, 12); err == nil {
465 t.Error("expected extension err")
467 if err := proto.SetExtension(msg, pb.E_Ext_More, 12); err == nil {
468 t.Error("expected some sort of type mismatch error, got nil")
472 func TestNilExtension(t *testing.T) {
473 msg := &pb.MyMessage{
474 Count: proto.Int32(1),
476 if err := proto.SetExtension(msg, pb.E_Ext_Text, proto.String("hello")); err != nil {
479 if err := proto.SetExtension(msg, pb.E_Ext_More, (*pb.Ext)(nil)); err == nil {
480 t.Error("expected SetExtension to fail due to a nil extension")
481 } else if want := fmt.Sprintf("proto: SetExtension called with nil value of type %T", new(pb.Ext)); err.Error() != want {
482 t.Errorf("expected error %v, got %v", want, err)
484 // Note: if the behavior of Marshal is ever changed to ignore nil extensions, update
485 // this test to verify that E_Ext_Text is properly propagated through marshal->unmarshal.
488 func TestMarshalUnmarshalRepeatedExtension(t *testing.T) {
489 // Add a repeated extension to the result.
492 ext []*pb.ComplexExtension
496 []*pb.ComplexExtension{
497 {First: proto.Int32(7)},
498 {Second: proto.Int32(11)},
503 []*pb.ComplexExtension{
504 {Third: []int32{1000}},
505 {Third: []int32{2000}},
509 "two fields and repeated field",
510 []*pb.ComplexExtension{
511 {Third: []int32{1000}},
512 {First: proto.Int32(9)},
513 {Second: proto.Int32(21)},
514 {Third: []int32{2000}},
518 for _, test := range tests {
519 // Marshal message with a repeated extension.
520 msg1 := new(pb.OtherMessage)
521 err := proto.SetExtension(msg1, pb.E_RComplex, test.ext)
523 t.Fatalf("[%s] Error setting extension: %v", test.name, err)
525 b, err := proto.Marshal(msg1)
527 t.Fatalf("[%s] Error marshaling message: %v", test.name, err)
530 // Unmarshal and read the merged proto.
531 msg2 := new(pb.OtherMessage)
532 err = proto.Unmarshal(b, msg2)
534 t.Fatalf("[%s] Error unmarshaling message: %v", test.name, err)
536 e, err := proto.GetExtension(msg2, pb.E_RComplex)
538 t.Fatalf("[%s] Error getting extension: %v", test.name, err)
540 ext := e.([]*pb.ComplexExtension)
542 t.Fatalf("[%s] Invalid extension", test.name)
544 if len(ext) != len(test.ext) {
545 t.Errorf("[%s] Wrong length of ComplexExtension: got: %v want: %v\n", test.name, len(ext), len(test.ext))
547 for i := range test.ext {
548 if !proto.Equal(ext[i], test.ext[i]) {
549 t.Errorf("[%s] Wrong value for ComplexExtension[%d]: got: %v want: %v\n", test.name, i, ext[i], test.ext[i])
555 func TestUnmarshalRepeatingNonRepeatedExtension(t *testing.T) {
556 // We may see multiple instances of the same extension in the wire
557 // format. For example, the proto compiler may encode custom options in
558 // this way. Here, we verify that we merge the extensions together.
561 ext []*pb.ComplexExtension
565 []*pb.ComplexExtension{
566 {First: proto.Int32(7)},
567 {Second: proto.Int32(11)},
572 []*pb.ComplexExtension{
573 {Third: []int32{1000}},
574 {Third: []int32{2000}},
578 "two fields and repeated field",
579 []*pb.ComplexExtension{
580 {Third: []int32{1000}},
581 {First: proto.Int32(9)},
582 {Second: proto.Int32(21)},
583 {Third: []int32{2000}},
587 for _, test := range tests {
589 var want pb.ComplexExtension
591 // Generate a serialized representation of a repeated extension
592 // by catenating bytes together.
593 for i, e := range test.ext {
594 // Merge to create the wanted proto.
595 proto.Merge(&want, e)
597 // serialize the message
598 msg := new(pb.OtherMessage)
599 err := proto.SetExtension(msg, pb.E_Complex, e)
601 t.Fatalf("[%s] Error setting extension %d: %v", test.name, i, err)
603 b, err := proto.Marshal(msg)
605 t.Fatalf("[%s] Error marshaling message %d: %v", test.name, i, err)
610 // Unmarshal and read the merged proto.
611 msg2 := new(pb.OtherMessage)
612 err := proto.Unmarshal(buf.Bytes(), msg2)
614 t.Fatalf("[%s] Error unmarshaling message: %v", test.name, err)
616 e, err := proto.GetExtension(msg2, pb.E_Complex)
618 t.Fatalf("[%s] Error getting extension: %v", test.name, err)
620 ext := e.(*pb.ComplexExtension)
622 t.Fatalf("[%s] Invalid extension", test.name)
624 if !proto.Equal(ext, &want) {
625 t.Errorf("[%s] Wrong value for ComplexExtension: got: %v want: %v\n", test.name, ext, &want)
631 func TestClearAllExtensions(t *testing.T) {
632 // unregistered extension
633 desc := &proto.ExtensionDesc{
634 ExtendedType: (*pb.MyMessage)(nil),
635 ExtensionType: (*bool)(nil),
637 Name: "emptyextension",
641 if proto.HasExtension(m, desc) {
642 t.Errorf("proto.HasExtension(%s): got true, want false", proto.MarshalTextString(m))
644 if err := proto.SetExtension(m, desc, proto.Bool(true)); err != nil {
645 t.Errorf("proto.SetExtension(m, desc, true): got error %q, want nil", err)
647 if !proto.HasExtension(m, desc) {
648 t.Errorf("proto.HasExtension(%s): got false, want true", proto.MarshalTextString(m))
650 proto.ClearAllExtensions(m)
651 if proto.HasExtension(m, desc) {
652 t.Errorf("proto.HasExtension(%s): got true, want false", proto.MarshalTextString(m))
656 func TestMarshalRace(t *testing.T) {
658 m := &pb.MyMessage{Count: proto.Int32(4)}
659 if err := proto.SetExtension(m, pb.E_Ext_More, ext); err != nil {
660 t.Fatalf("proto.SetExtension(m, desc, true): got error %q, want nil", err)
663 b, err := proto.Marshal(m)
665 t.Fatalf("Could not marshal message: %v", err)
667 if err := proto.Unmarshal(b, m); err != nil {
668 t.Fatalf("Could not unmarshal message: %v", err)
670 // after Unmarshal, the extension is in undecoded form.
671 // GetExtension will decode it lazily. Make sure this does
672 // not race against Marshal.
674 errChan := make(chan error, 6)
675 for n := 3; n > 0; n-- {
677 _, err := proto.Marshal(m)
681 _, err := proto.GetExtension(m, pb.E_Ext_More)
685 for i := 0; i < 6; i++ {