src/google/protobuf/preserve_unknown_enum_test.cc - third_party/protobuf - Git at Google

 // Protocol Buffers - Google's data interchange format
 // Copyright 2008 Google Inc.  All rights reserved.
 // https://developers.google.com/protocol-buffers/
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 // copyright notice, this list of conditions and the following disclaimer
 // in the documentation and/or other materials provided with the
 // distribution.
 //     * Neither the name of Google Inc. nor the names of its
 // contributors may be used to endorse or promote products derived from
 // this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 #include "google/protobuf/descriptor.h"
 #include "google/protobuf/dynamic_message.h"
 #include <gtest/gtest.h>
 #include "google/protobuf/unittest.pb.h"
 #include "google/protobuf/unittest_preserve_unknown_enum.pb.h"
 #include "google/protobuf/unittest_preserve_unknown_enum2.pb.h"

 namespace google {
 namespace protobuf {
 namespace {

 void FillMessage(
     proto3_preserve_unknown_enum_unittest::MyMessagePlusExtra* message) {
   message->set_e(proto3_preserve_unknown_enum_unittest::E_EXTRA);
   message->add_repeated_e(proto3_preserve_unknown_enum_unittest::E_EXTRA);
   message->add_repeated_packed_e(
       proto3_preserve_unknown_enum_unittest::E_EXTRA);
   message->add_repeated_packed_unexpected_e(
       proto3_preserve_unknown_enum_unittest::E_EXTRA);
   message->set_oneof_e_1(proto3_preserve_unknown_enum_unittest::E_EXTRA);
 }

 void CheckMessage(
     const proto3_preserve_unknown_enum_unittest::MyMessagePlusExtra& message) {
   EXPECT_EQ(proto3_preserve_unknown_enum_unittest::E_EXTRA, message.e());
   EXPECT_EQ(1, message.repeated_e_size());
   EXPECT_EQ(proto3_preserve_unknown_enum_unittest::E_EXTRA,
             message.repeated_e(0));
   EXPECT_EQ(1, message.repeated_packed_e_size());
   EXPECT_EQ(proto3_preserve_unknown_enum_unittest::E_EXTRA,
             message.repeated_packed_e(0));
   EXPECT_EQ(1, message.repeated_packed_unexpected_e_size());
   EXPECT_EQ(proto3_preserve_unknown_enum_unittest::E_EXTRA,
             message.repeated_packed_unexpected_e(0));
   EXPECT_EQ(proto3_preserve_unknown_enum_unittest::E_EXTRA,
             message.oneof_e_1());
 }

 void CheckMessage(
     const proto3_preserve_unknown_enum_unittest::MyMessage& message) {
   EXPECT_EQ(static_cast<int>(proto3_preserve_unknown_enum_unittest::E_EXTRA),
             static_cast<int>(message.e()));
   EXPECT_EQ(1, message.repeated_e_size());
   EXPECT_EQ(static_cast<int>(proto3_preserve_unknown_enum_unittest::E_EXTRA),
             static_cast<int>(message.repeated_e(0)));
   EXPECT_EQ(1, message.repeated_packed_e_size());
   EXPECT_EQ(static_cast<int>(proto3_preserve_unknown_enum_unittest::E_EXTRA),
             static_cast<int>(message.repeated_packed_e(0)));
   EXPECT_EQ(1, message.repeated_packed_unexpected_e_size());
   EXPECT_EQ(static_cast<int>(proto3_preserve_unknown_enum_unittest::E_EXTRA),
             static_cast<int>(message.repeated_packed_unexpected_e(0)));
   EXPECT_EQ(static_cast<int>(proto3_preserve_unknown_enum_unittest::E_EXTRA),
             static_cast<int>(message.oneof_e_1()));
 }

 }  // anonymous namespace

 // Test that parsing preserves an unknown value in the enum field and does not
 // punt it to the UnknownFieldSet.
 TEST(PreserveUnknownEnumTest, PreserveParseAndSerialize) {
   proto3_preserve_unknown_enum_unittest::MyMessagePlusExtra orig_message;
   FillMessage(&orig_message);
   std::string serialized;
   orig_message.SerializeToString(&serialized);

   proto3_preserve_unknown_enum_unittest::MyMessage message;
   EXPECT_EQ(true, message.ParseFromString(serialized));
   CheckMessage(message);

   serialized.clear();
   message.SerializeToString(&serialized);
   EXPECT_EQ(true, orig_message.ParseFromString(serialized));
   CheckMessage(orig_message);
 }

 // Test that reflection based implementation also keeps unknown enum values and
 // doesn't put them into UnknownFieldSet.
 TEST(PreserveUnknownEnumTest, PreserveParseAndSerializeDynamicMessage) {
   proto3_preserve_unknown_enum_unittest::MyMessagePlusExtra orig_message;
   FillMessage(&orig_message);
   std::string serialized = orig_message.SerializeAsString();

   DynamicMessageFactory factory;
   std::unique_ptr<Message> message(
       factory
           .GetPrototype(
               proto3_preserve_unknown_enum_unittest::MyMessage::descriptor())
           ->New());
   EXPECT_EQ(true, message->ParseFromString(serialized));
   message->DiscardUnknownFields();

   serialized = message->SerializeAsString();
   EXPECT_EQ(true, orig_message.ParseFromString(serialized));
   CheckMessage(orig_message);
 }

 // Test that for proto2 messages, unknown values are in unknown fields.
 TEST(PreserveUnknownEnumTest, Proto2HidesUnknownValues) {
   proto3_preserve_unknown_enum_unittest::MyMessagePlusExtra orig_message;
   FillMessage(&orig_message);

   std::string serialized;
   orig_message.SerializeToString(&serialized);

   proto2_preserve_unknown_enum_unittest::MyMessage message;
   EXPECT_EQ(true, message.ParseFromString(serialized));
   // The intermediate message has everything in its "unknown fields".
   proto2_preserve_unknown_enum_unittest::MyMessage message2 = message;
   message2.DiscardUnknownFields();
   EXPECT_EQ(0, message2.ByteSizeLong());

   // But when we pass it to the correct structure, all values are there.
   serialized.clear();
   message.SerializeToString(&serialized);
   EXPECT_EQ(true, orig_message.ParseFromString(serialized));
   CheckMessage(orig_message);
 }

 // Same as before, for a dynamic message.
 TEST(PreserveUnknownEnumTest, DynamicProto2HidesUnknownValues) {
   proto3_preserve_unknown_enum_unittest::MyMessagePlusExtra orig_message;
   FillMessage(&orig_message);

   std::string serialized;
   orig_message.SerializeToString(&serialized);

   DynamicMessageFactory factory;
   std::unique_ptr<Message> message(
       factory
           .GetPrototype(
               proto2_preserve_unknown_enum_unittest::MyMessage::descriptor())
           ->New());
   EXPECT_EQ(true, message->ParseFromString(serialized));
   // The intermediate message has everything in its "unknown fields".
   proto2_preserve_unknown_enum_unittest::MyMessage message2;
   message2.CopyFrom(*message);
   message2.DiscardUnknownFields();
   EXPECT_EQ(0, message2.ByteSizeLong());

   // But when we pass it to the correct structure, all values are there.
   serialized.clear();
   message->SerializeToString(&serialized);
   EXPECT_EQ(true, orig_message.ParseFromString(serialized));
   CheckMessage(orig_message);
 }

 // Test that reflection provides EnumValueDescriptors for unknown values.
 TEST(PreserveUnknownEnumTest, DynamicEnumValueDescriptors) {
   proto3_preserve_unknown_enum_unittest::MyMessagePlusExtra orig_message;
   FillMessage(&orig_message);
   std::string serialized;
   orig_message.SerializeToString(&serialized);

   proto3_preserve_unknown_enum_unittest::MyMessage message;
   EXPECT_EQ(true, message.ParseFromString(serialized));
   CheckMessage(message);

   const Reflection* r = message.GetReflection();
   const Descriptor* d = message.GetDescriptor();
   const FieldDescriptor* field = d->FindFieldByName("e");

   // This should dynamically create an EnumValueDescriptor.
   const EnumValueDescriptor* enum_value = r->GetEnum(message, field);
   EXPECT_EQ(enum_value->number(),
             static_cast<int>(proto3_preserve_unknown_enum_unittest::E_EXTRA));

   // Fetching value for a second time should return the same pointer.
   const EnumValueDescriptor* enum_value_second = r->GetEnum(message, field);
   EXPECT_EQ(enum_value, enum_value_second);

   // Check the repeated case too.
   const FieldDescriptor* repeated_field = d->FindFieldByName("repeated_e");
   enum_value = r->GetRepeatedEnum(message, repeated_field, 0);
   EXPECT_EQ(enum_value->number(),
             static_cast<int>(proto3_preserve_unknown_enum_unittest::E_EXTRA));
   // Should reuse the same EnumValueDescriptor, even for a different field.
   EXPECT_EQ(enum_value, enum_value_second);

   // We should be able to use the returned value descriptor to set a value on
   // another message.
   Message* m = message.New();
   r->SetEnum(m, field, enum_value);
   EXPECT_EQ(enum_value, r->GetEnum(*m, field));
   delete m;
 }

 // Test that the new integer-based enum reflection API works.
 TEST(PreserveUnknownEnumTest, IntegerEnumReflectionAPI) {
   proto3_preserve_unknown_enum_unittest::MyMessage message;
   const Reflection* r = message.GetReflection();
   const Descriptor* d = message.GetDescriptor();

   const FieldDescriptor* singular_field = d->FindFieldByName("e");
   const FieldDescriptor* repeated_field = d->FindFieldByName("repeated_e");

   r->SetEnumValue(&message, singular_field, 42);
   EXPECT_EQ(42, r->GetEnumValue(message, singular_field));
   r->AddEnumValue(&message, repeated_field, 42);
   r->AddEnumValue(&message, repeated_field, 42);
   EXPECT_EQ(42, r->GetRepeatedEnumValue(message, repeated_field, 0));
   r->SetRepeatedEnumValue(&message, repeated_field, 1, 84);
   EXPECT_EQ(84, r->GetRepeatedEnumValue(message, repeated_field, 1));
   const EnumValueDescriptor* enum_value = r->GetEnum(message, singular_field);
   EXPECT_EQ(42, enum_value->number());
 }

 // Test that the EnumValue API works properly for proto2 messages as well.
 TEST(PreserveUnknownEnumTest, Proto2CatchesUnknownValues) {
   protobuf_unittest::TestAllTypes message;  // proto2 message
   const Reflection* r = message.GetReflection();
   const Descriptor* d = message.GetDescriptor();
   const FieldDescriptor* repeated_field =
       d->FindFieldByName("repeated_nested_enum");
   // Add one element to the repeated field so that we can test
   // SetRepeatedEnumValue.
   const EnumValueDescriptor* enum_value =
       repeated_field->enum_type()->FindValueByName("BAR");
   EXPECT_TRUE(enum_value != nullptr);
   r->AddEnum(&message, repeated_field, enum_value);

   const FieldDescriptor* singular_field =
       d->FindFieldByName("optional_nested_enum");
   // Enum-field integer-based setters treat as unknown integer values as
   // unknown fields.
   r->SetEnumValue(&message, singular_field, 4242);
   EXPECT_EQ(r->GetEnum(message, singular_field)->number(),
             protobuf_unittest::TestAllTypes::FOO);
   r->SetRepeatedEnumValue(&message, repeated_field, 0, 4242);
   // repeated_nested_enum was set to bar above, this should not have changed.
   EXPECT_EQ(r->GetRepeatedEnum(message, repeated_field, 0)->number(),
             protobuf_unittest::TestAllTypes::BAR);
   r->AddEnumValue(&message, repeated_field, 4242);
   // No element should be added
   EXPECT_EQ(message.repeated_nested_enum_size(), 1);

   // We require the enums to end up in unknown field set
   ASSERT_EQ(message.unknown_fields().field_count(), 3);
   EXPECT_EQ(message.unknown_fields().field(0).number(),
             singular_field->number());
   EXPECT_EQ(message.unknown_fields().field(0).varint(), 4242);
   EXPECT_EQ(message.unknown_fields().field(1).number(),
             repeated_field->number());
   EXPECT_EQ(message.unknown_fields().field(1).varint(), 4242);
   EXPECT_EQ(message.unknown_fields().field(2).number(),
             repeated_field->number());
   EXPECT_EQ(message.unknown_fields().field(2).varint(), 4242);
 }

 TEST(PreserveUnknownEnumTest, SupportsUnknownEnumValuesAPI) {
   protobuf_unittest::TestAllTypes proto2_message;
   proto3_preserve_unknown_enum_unittest::MyMessage new_message;

   const Reflection* proto2_reflection = proto2_message.GetReflection();
   const Reflection* new_reflection = new_message.GetReflection();

   EXPECT_FALSE(proto2_reflection->SupportsUnknownEnumValues());
   EXPECT_TRUE(new_reflection->SupportsUnknownEnumValues());
 }
 }  // namespace protobuf
 }  // namespace google
	// Protocol Buffers - Google's data interchange format
	// Copyright 2008 Google Inc. All rights reserved.
	// https://developers.google.com/protocol-buffers/
	//
	// Redistribution and use in source and binary forms, with or without
	// modification, are permitted provided that the following conditions are
	// met:
	//
	// * Redistributions of source code must retain the above copyright
	// notice, this list of conditions and the following disclaimer.
	// * Redistributions in binary form must reproduce the above
	// copyright notice, this list of conditions and the following disclaimer
	// in the documentation and/or other materials provided with the
	// distribution.
	// * Neither the name of Google Inc. nor the names of its
	// contributors may be used to endorse or promote products derived from
	// this software without specific prior written permission.
	//
	// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

	#include "google/protobuf/descriptor.h"
	#include "google/protobuf/dynamic_message.h"
	#include <gtest/gtest.h>
	#include "google/protobuf/unittest.pb.h"
	#include "google/protobuf/unittest_preserve_unknown_enum.pb.h"
	#include "google/protobuf/unittest_preserve_unknown_enum2.pb.h"

	namespace google {
	namespace protobuf {
	namespace {

	void FillMessage(
	proto3_preserve_unknown_enum_unittest::MyMessagePlusExtra* message) {
	message->set_e(proto3_preserve_unknown_enum_unittest::E_EXTRA);
	message->add_repeated_e(proto3_preserve_unknown_enum_unittest::E_EXTRA);
	message->add_repeated_packed_e(
	proto3_preserve_unknown_enum_unittest::E_EXTRA);
	message->add_repeated_packed_unexpected_e(
	proto3_preserve_unknown_enum_unittest::E_EXTRA);
	message->set_oneof_e_1(proto3_preserve_unknown_enum_unittest::E_EXTRA);
	}

	void CheckMessage(
	const proto3_preserve_unknown_enum_unittest::MyMessagePlusExtra& message) {
	EXPECT_EQ(proto3_preserve_unknown_enum_unittest::E_EXTRA, message.e());
	EXPECT_EQ(1, message.repeated_e_size());
	EXPECT_EQ(proto3_preserve_unknown_enum_unittest::E_EXTRA,
	message.repeated_e(0));
	EXPECT_EQ(1, message.repeated_packed_e_size());
	EXPECT_EQ(proto3_preserve_unknown_enum_unittest::E_EXTRA,
	message.repeated_packed_e(0));
	EXPECT_EQ(1, message.repeated_packed_unexpected_e_size());
	EXPECT_EQ(proto3_preserve_unknown_enum_unittest::E_EXTRA,
	message.repeated_packed_unexpected_e(0));
	EXPECT_EQ(proto3_preserve_unknown_enum_unittest::E_EXTRA,
	message.oneof_e_1());
	}

	void CheckMessage(
	const proto3_preserve_unknown_enum_unittest::MyMessage& message) {
	EXPECT_EQ(static_cast<int>(proto3_preserve_unknown_enum_unittest::E_EXTRA),
	static_cast<int>(message.e()));
	EXPECT_EQ(1, message.repeated_e_size());
	EXPECT_EQ(static_cast<int>(proto3_preserve_unknown_enum_unittest::E_EXTRA),
	static_cast<int>(message.repeated_e(0)));
	EXPECT_EQ(1, message.repeated_packed_e_size());
	EXPECT_EQ(static_cast<int>(proto3_preserve_unknown_enum_unittest::E_EXTRA),
	static_cast<int>(message.repeated_packed_e(0)));
	EXPECT_EQ(1, message.repeated_packed_unexpected_e_size());
	EXPECT_EQ(static_cast<int>(proto3_preserve_unknown_enum_unittest::E_EXTRA),
	static_cast<int>(message.repeated_packed_unexpected_e(0)));
	EXPECT_EQ(static_cast<int>(proto3_preserve_unknown_enum_unittest::E_EXTRA),
	static_cast<int>(message.oneof_e_1()));
	}

	} // anonymous namespace

	// Test that parsing preserves an unknown value in the enum field and does not
	// punt it to the UnknownFieldSet.
	TEST(PreserveUnknownEnumTest, PreserveParseAndSerialize) {
	proto3_preserve_unknown_enum_unittest::MyMessagePlusExtra orig_message;
	FillMessage(&orig_message);
	std::string serialized;
	orig_message.SerializeToString(&serialized);

	proto3_preserve_unknown_enum_unittest::MyMessage message;
	EXPECT_EQ(true, message.ParseFromString(serialized));
	CheckMessage(message);

	serialized.clear();
	message.SerializeToString(&serialized);
	EXPECT_EQ(true, orig_message.ParseFromString(serialized));
	CheckMessage(orig_message);
	}

	// Test that reflection based implementation also keeps unknown enum values and
	// doesn't put them into UnknownFieldSet.
	TEST(PreserveUnknownEnumTest, PreserveParseAndSerializeDynamicMessage) {
	proto3_preserve_unknown_enum_unittest::MyMessagePlusExtra orig_message;
	FillMessage(&orig_message);
	std::string serialized = orig_message.SerializeAsString();

	DynamicMessageFactory factory;
	std::unique_ptr<Message> message(
	factory
	.GetPrototype(
	proto3_preserve_unknown_enum_unittest::MyMessage::descriptor())
	->New());
	EXPECT_EQ(true, message->ParseFromString(serialized));
	message->DiscardUnknownFields();

	serialized = message->SerializeAsString();
	EXPECT_EQ(true, orig_message.ParseFromString(serialized));
	CheckMessage(orig_message);
	}

	// Test that for proto2 messages, unknown values are in unknown fields.
	TEST(PreserveUnknownEnumTest, Proto2HidesUnknownValues) {
	proto3_preserve_unknown_enum_unittest::MyMessagePlusExtra orig_message;
	FillMessage(&orig_message);

	std::string serialized;
	orig_message.SerializeToString(&serialized);

	proto2_preserve_unknown_enum_unittest::MyMessage message;
	EXPECT_EQ(true, message.ParseFromString(serialized));
	// The intermediate message has everything in its "unknown fields".
	proto2_preserve_unknown_enum_unittest::MyMessage message2 = message;
	message2.DiscardUnknownFields();
	EXPECT_EQ(0, message2.ByteSizeLong());

	// But when we pass it to the correct structure, all values are there.
	serialized.clear();
	message.SerializeToString(&serialized);
	EXPECT_EQ(true, orig_message.ParseFromString(serialized));
	CheckMessage(orig_message);
	}

	// Same as before, for a dynamic message.
	TEST(PreserveUnknownEnumTest, DynamicProto2HidesUnknownValues) {
	proto3_preserve_unknown_enum_unittest::MyMessagePlusExtra orig_message;
	FillMessage(&orig_message);

	std::string serialized;
	orig_message.SerializeToString(&serialized);

	DynamicMessageFactory factory;
	std::unique_ptr<Message> message(
	factory
	.GetPrototype(
	proto2_preserve_unknown_enum_unittest::MyMessage::descriptor())
	->New());
	EXPECT_EQ(true, message->ParseFromString(serialized));
	// The intermediate message has everything in its "unknown fields".
	proto2_preserve_unknown_enum_unittest::MyMessage message2;
	message2.CopyFrom(*message);
	message2.DiscardUnknownFields();
	EXPECT_EQ(0, message2.ByteSizeLong());

	// But when we pass it to the correct structure, all values are there.
	serialized.clear();
	message->SerializeToString(&serialized);
	EXPECT_EQ(true, orig_message.ParseFromString(serialized));
	CheckMessage(orig_message);
	}

	// Test that reflection provides EnumValueDescriptors for unknown values.
	TEST(PreserveUnknownEnumTest, DynamicEnumValueDescriptors) {
	proto3_preserve_unknown_enum_unittest::MyMessagePlusExtra orig_message;
	FillMessage(&orig_message);
	std::string serialized;
	orig_message.SerializeToString(&serialized);

	proto3_preserve_unknown_enum_unittest::MyMessage message;
	EXPECT_EQ(true, message.ParseFromString(serialized));
	CheckMessage(message);

	const Reflection* r = message.GetReflection();
	const Descriptor* d = message.GetDescriptor();
	const FieldDescriptor* field = d->FindFieldByName("e");

	// This should dynamically create an EnumValueDescriptor.
	const EnumValueDescriptor* enum_value = r->GetEnum(message, field);
	EXPECT_EQ(enum_value->number(),
	static_cast<int>(proto3_preserve_unknown_enum_unittest::E_EXTRA));

	// Fetching value for a second time should return the same pointer.
	const EnumValueDescriptor* enum_value_second = r->GetEnum(message, field);
	EXPECT_EQ(enum_value, enum_value_second);

	// Check the repeated case too.
	const FieldDescriptor* repeated_field = d->FindFieldByName("repeated_e");
	enum_value = r->GetRepeatedEnum(message, repeated_field, 0);
	EXPECT_EQ(enum_value->number(),
	static_cast<int>(proto3_preserve_unknown_enum_unittest::E_EXTRA));
	// Should reuse the same EnumValueDescriptor, even for a different field.
	EXPECT_EQ(enum_value, enum_value_second);

	// We should be able to use the returned value descriptor to set a value on
	// another message.
	Message* m = message.New();
	r->SetEnum(m, field, enum_value);
	EXPECT_EQ(enum_value, r->GetEnum(*m, field));
	delete m;
	}

	// Test that the new integer-based enum reflection API works.
	TEST(PreserveUnknownEnumTest, IntegerEnumReflectionAPI) {
	proto3_preserve_unknown_enum_unittest::MyMessage message;
	const Reflection* r = message.GetReflection();
	const Descriptor* d = message.GetDescriptor();

	const FieldDescriptor* singular_field = d->FindFieldByName("e");
	const FieldDescriptor* repeated_field = d->FindFieldByName("repeated_e");

	r->SetEnumValue(&message, singular_field, 42);
	EXPECT_EQ(42, r->GetEnumValue(message, singular_field));
	r->AddEnumValue(&message, repeated_field, 42);
	r->AddEnumValue(&message, repeated_field, 42);
	EXPECT_EQ(42, r->GetRepeatedEnumValue(message, repeated_field, 0));
	r->SetRepeatedEnumValue(&message, repeated_field, 1, 84);
	EXPECT_EQ(84, r->GetRepeatedEnumValue(message, repeated_field, 1));
	const EnumValueDescriptor* enum_value = r->GetEnum(message, singular_field);
	EXPECT_EQ(42, enum_value->number());
	}

	// Test that the EnumValue API works properly for proto2 messages as well.
	TEST(PreserveUnknownEnumTest, Proto2CatchesUnknownValues) {
	protobuf_unittest::TestAllTypes message; // proto2 message
	const Reflection* r = message.GetReflection();
	const Descriptor* d = message.GetDescriptor();
	const FieldDescriptor* repeated_field =
	d->FindFieldByName("repeated_nested_enum");
	// Add one element to the repeated field so that we can test
	// SetRepeatedEnumValue.
	const EnumValueDescriptor* enum_value =
	repeated_field->enum_type()->FindValueByName("BAR");
	EXPECT_TRUE(enum_value != nullptr);
	r->AddEnum(&message, repeated_field, enum_value);

	const FieldDescriptor* singular_field =
	d->FindFieldByName("optional_nested_enum");
	// Enum-field integer-based setters treat as unknown integer values as
	// unknown fields.
	r->SetEnumValue(&message, singular_field, 4242);
	EXPECT_EQ(r->GetEnum(message, singular_field)->number(),
	protobuf_unittest::TestAllTypes::FOO);
	r->SetRepeatedEnumValue(&message, repeated_field, 0, 4242);
	// repeated_nested_enum was set to bar above, this should not have changed.
	EXPECT_EQ(r->GetRepeatedEnum(message, repeated_field, 0)->number(),
	protobuf_unittest::TestAllTypes::BAR);
	r->AddEnumValue(&message, repeated_field, 4242);
	// No element should be added
	EXPECT_EQ(message.repeated_nested_enum_size(), 1);

	// We require the enums to end up in unknown field set
	ASSERT_EQ(message.unknown_fields().field_count(), 3);
	EXPECT_EQ(message.unknown_fields().field(0).number(),
	singular_field->number());
	EXPECT_EQ(message.unknown_fields().field(0).varint(), 4242);
	EXPECT_EQ(message.unknown_fields().field(1).number(),
	repeated_field->number());
	EXPECT_EQ(message.unknown_fields().field(1).varint(), 4242);
	EXPECT_EQ(message.unknown_fields().field(2).number(),
	repeated_field->number());
	EXPECT_EQ(message.unknown_fields().field(2).varint(), 4242);
	}

	TEST(PreserveUnknownEnumTest, SupportsUnknownEnumValuesAPI) {
	protobuf_unittest::TestAllTypes proto2_message;
	proto3_preserve_unknown_enum_unittest::MyMessage new_message;

	const Reflection* proto2_reflection = proto2_message.GetReflection();
	const Reflection* new_reflection = new_message.GetReflection();

	EXPECT_FALSE(proto2_reflection->SupportsUnknownEnumValues());
	EXPECT_TRUE(new_reflection->SupportsUnknownEnumValues());
	}
	} // namespace protobuf
	} // namespace google