objectivec/Tests/GPBUnknownFieldSetTest.m - third_party/protobuf - Git at Google

 // Protocol Buffers - Google's data interchange format
 // Copyright 2008 Google Inc.  All rights reserved.
 //
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file or at
 // https://developers.google.com/open-source/licenses/bsd

 #import "GPBTestUtilities.h"

 #import "GPBUnknownFieldSet_PackagePrivate.h"
 #import "GPBUnknownField_PackagePrivate.h"
 #import "objectivec/Tests/Unittest.pbobjc.h"

 @interface GPBUnknownFieldSet (GPBUnknownFieldSetTest)
 - (void)getTags:(int32_t*)tags;
 @end

 @interface UnknownFieldSetTest : GPBTestCase {
  @private
   TestAllTypes* allFields_;
   NSData* allFieldsData_;

   // An empty message that has been parsed from allFieldsData.  So, it has
   // unknown fields of every type.
   TestEmptyMessage* emptyMessage_;
   GPBUnknownFieldSet* unknownFields_;
 }

 @end

 @implementation UnknownFieldSetTest

 - (void)setUp {
   allFields_ = [self allSetRepeatedCount:kGPBDefaultRepeatCount];
   allFieldsData_ = [allFields_ data];
   emptyMessage_ = [TestEmptyMessage parseFromData:allFieldsData_ error:NULL];
   unknownFields_ = emptyMessage_.unknownFields;
 }

 - (void)testInvalidFieldNumber {
   GPBUnknownFieldSet* set = [[[GPBUnknownFieldSet alloc] init] autorelease];
   GPBUnknownField* field = [[[GPBUnknownField alloc] initWithNumber:0] autorelease];
   XCTAssertThrowsSpecificNamed([set addField:field], NSException, NSInvalidArgumentException);
 }

 - (void)testEqualityAndHash {
   // Empty

   GPBUnknownFieldSet* set1 = [[[GPBUnknownFieldSet alloc] init] autorelease];
   XCTAssertTrue([set1 isEqual:set1]);
   XCTAssertFalse([set1 isEqual:@"foo"]);
   GPBUnknownFieldSet* set2 = [[[GPBUnknownFieldSet alloc] init] autorelease];
   XCTAssertEqualObjects(set1, set2);
   XCTAssertEqual([set1 hash], [set2 hash]);

   // Varint

   GPBUnknownField* field1 = [[[GPBUnknownField alloc] initWithNumber:1] autorelease];
   [field1 addVarint:1];
   [set1 addField:field1];
   XCTAssertNotEqualObjects(set1, set2);
   GPBUnknownField* field2 = [[[GPBUnknownField alloc] initWithNumber:1] autorelease];
   [field2 addVarint:1];
   [set2 addField:field2];
   XCTAssertEqualObjects(set1, set2);
   XCTAssertEqual([set1 hash], [set2 hash]);

   // Fixed32

   field1 = [[[GPBUnknownField alloc] initWithNumber:2] autorelease];
   [field1 addFixed32:2];
   [set1 addField:field1];
   XCTAssertNotEqualObjects(set1, set2);
   field2 = [[[GPBUnknownField alloc] initWithNumber:2] autorelease];
   [field2 addFixed32:2];
   [set2 addField:field2];
   XCTAssertEqualObjects(set1, set2);
   XCTAssertEqual([set1 hash], [set2 hash]);

   // Fixed64

   field1 = [[[GPBUnknownField alloc] initWithNumber:3] autorelease];
   [field1 addFixed64:3];
   [set1 addField:field1];
   XCTAssertNotEqualObjects(set1, set2);
   field2 = [[[GPBUnknownField alloc] initWithNumber:3] autorelease];
   [field2 addFixed64:3];
   [set2 addField:field2];
   XCTAssertEqualObjects(set1, set2);
   XCTAssertEqual([set1 hash], [set2 hash]);

   // LengthDelimited

   field1 = [[[GPBUnknownField alloc] initWithNumber:4] autorelease];
   [field1 addLengthDelimited:DataFromCStr("foo")];
   [set1 addField:field1];
   XCTAssertNotEqualObjects(set1, set2);
   field2 = [[[GPBUnknownField alloc] initWithNumber:4] autorelease];
   [field2 addLengthDelimited:DataFromCStr("foo")];
   [set2 addField:field2];
   XCTAssertEqualObjects(set1, set2);
   XCTAssertEqual([set1 hash], [set2 hash]);

   // Group

   GPBUnknownFieldSet* group1 = [[[GPBUnknownFieldSet alloc] init] autorelease];
   GPBUnknownField* fieldGroup1 = [[[GPBUnknownField alloc] initWithNumber:10] autorelease];
   [fieldGroup1 addVarint:1];
   [group1 addField:fieldGroup1];
   GPBUnknownFieldSet* group2 = [[[GPBUnknownFieldSet alloc] init] autorelease];
   GPBUnknownField* fieldGroup2 = [[[GPBUnknownField alloc] initWithNumber:10] autorelease];
   [fieldGroup2 addVarint:1];
   [group2 addField:fieldGroup2];

   field1 = [[[GPBUnknownField alloc] initWithNumber:5] autorelease];
   [field1 addGroup:group1];
   [set1 addField:field1];
   XCTAssertNotEqualObjects(set1, set2);
   field2 = [[[GPBUnknownField alloc] initWithNumber:5] autorelease];
   [field2 addGroup:group2];
   [set2 addField:field2];
   XCTAssertEqualObjects(set1, set2);
   XCTAssertEqual([set1 hash], [set2 hash]);

   // Exercise description for completeness.
   XCTAssertTrue(set1.description.length > 10);
 }

 // Constructs a protocol buffer which contains fields with all the same
 // numbers as allFieldsData except that each field is some other wire
 // type.
 - (NSData*)getBizarroData {
   GPBUnknownFieldSet* bizarroFields = [[[GPBUnknownFieldSet alloc] init] autorelease];
   NSUInteger count = [unknownFields_ countOfFields];
   int32_t* tags = malloc(count * sizeof(int32_t));
   if (!tags) {
     XCTFail(@"Failed to make scratch buffer for testing");
     return [NSData data];
   }
   @try {
     [unknownFields_ getTags:tags];
     for (NSUInteger i = 0; i < count; ++i) {
       int32_t tag = tags[i];
       GPBUnknownField* field = [unknownFields_ getField:tag];
       if (field.varintList.count == 0) {
         // Original field is not a varint, so use a varint.
         GPBUnknownField* varintField = [[[GPBUnknownField alloc] initWithNumber:tag] autorelease];
         [varintField addVarint:1];
         [bizarroFields addField:varintField];
       } else {
         // Original field *is* a varint, so use something else.
         GPBUnknownField* fixed32Field = [[[GPBUnknownField alloc] initWithNumber:tag] autorelease];
         [fixed32Field addFixed32:1];
         [bizarroFields addField:fixed32Field];
       }
     }
   } @finally {
     free(tags);
   }

   return [bizarroFields data];
 }

 - (void)testSerialize {
   // Check that serializing the UnknownFieldSet produces the original data
   // again.
   NSData* data = [emptyMessage_ data];
   XCTAssertEqualObjects(allFieldsData_, data);
 }

 - (void)testCopyFrom {
   TestEmptyMessage* message = [TestEmptyMessage message];
   [message mergeFrom:emptyMessage_];

   XCTAssertEqualObjects(emptyMessage_.data, message.data);
 }

 - (void)testMergeFrom {
   GPBUnknownFieldSet* set1 = [[[GPBUnknownFieldSet alloc] init] autorelease];
   GPBUnknownField* field = [[[GPBUnknownField alloc] initWithNumber:2] autorelease];
   [field addVarint:2];
   [set1 addField:field];
   field = [[[GPBUnknownField alloc] initWithNumber:3] autorelease];
   [field addVarint:4];
   [set1 addField:field];
   field = [[[GPBUnknownField alloc] initWithNumber:4] autorelease];
   [field addFixed32:6];
   [set1 addField:field];
   field = [[[GPBUnknownField alloc] initWithNumber:5] autorelease];
   [field addFixed64:20];
   [set1 addField:field];
   field = [[[GPBUnknownField alloc] initWithNumber:10] autorelease];
   [field addLengthDelimited:DataFromCStr("data1")];
   [set1 addField:field];

   GPBUnknownFieldSet* group1 = [[[GPBUnknownFieldSet alloc] init] autorelease];
   GPBUnknownField* fieldGroup1 = [[[GPBUnknownField alloc] initWithNumber:200] autorelease];
   [fieldGroup1 addVarint:100];
   [group1 addField:fieldGroup1];

   field = [[[GPBUnknownField alloc] initWithNumber:11] autorelease];
   [field addGroup:group1];
   [set1 addField:field];

   GPBUnknownFieldSet* set2 = [[[GPBUnknownFieldSet alloc] init] autorelease];
   field = [[[GPBUnknownField alloc] initWithNumber:1] autorelease];
   [field addVarint:1];
   [set2 addField:field];
   field = [[[GPBUnknownField alloc] initWithNumber:3] autorelease];
   [field addVarint:3];
   [set2 addField:field];
   field = [[[GPBUnknownField alloc] initWithNumber:4] autorelease];
   [field addFixed32:7];
   [set2 addField:field];
   field = [[[GPBUnknownField alloc] initWithNumber:5] autorelease];
   [field addFixed64:30];
   [set2 addField:field];
   field = [[[GPBUnknownField alloc] initWithNumber:10] autorelease];
   [field addLengthDelimited:DataFromCStr("data2")];
   [set2 addField:field];

   GPBUnknownFieldSet* group2 = [[[GPBUnknownFieldSet alloc] init] autorelease];
   GPBUnknownField* fieldGroup2 = [[[GPBUnknownField alloc] initWithNumber:201] autorelease];
   [fieldGroup2 addVarint:99];
   [group2 addField:fieldGroup2];

   field = [[[GPBUnknownField alloc] initWithNumber:11] autorelease];
   [field addGroup:group2];
   [set2 addField:field];

   GPBUnknownFieldSet* set3 = [[[GPBUnknownFieldSet alloc] init] autorelease];
   field = [[[GPBUnknownField alloc] initWithNumber:1] autorelease];
   [field addVarint:1];
   [set3 addField:field];
   field = [[[GPBUnknownField alloc] initWithNumber:2] autorelease];
   [field addVarint:2];
   [set3 addField:field];
   field = [[[GPBUnknownField alloc] initWithNumber:3] autorelease];
   [field addVarint:4];
   [set3 addField:field];
   [field addVarint:3];
   [set3 addField:field];
   field = [[[GPBUnknownField alloc] initWithNumber:4] autorelease];
   [field addFixed32:6];
   [field addFixed32:7];
   [set3 addField:field];
   field = [[[GPBUnknownField alloc] initWithNumber:5] autorelease];
   [field addFixed64:20];
   [field addFixed64:30];
   [set3 addField:field];
   field = [[[GPBUnknownField alloc] initWithNumber:10] autorelease];
   [field addLengthDelimited:DataFromCStr("data1")];
   [field addLengthDelimited:DataFromCStr("data2")];
   [set3 addField:field];

   GPBUnknownFieldSet* group3a = [[[GPBUnknownFieldSet alloc] init] autorelease];
   GPBUnknownField* fieldGroup3a1 = [[[GPBUnknownField alloc] initWithNumber:200] autorelease];
   [fieldGroup3a1 addVarint:100];
   [group3a addField:fieldGroup3a1];
   GPBUnknownFieldSet* group3b = [[[GPBUnknownFieldSet alloc] init] autorelease];
   GPBUnknownField* fieldGroup3b2 = [[[GPBUnknownField alloc] initWithNumber:201] autorelease];
   [fieldGroup3b2 addVarint:99];
   [group3b addField:fieldGroup3b2];

   field = [[[GPBUnknownField alloc] initWithNumber:11] autorelease];
   [field addGroup:group1];
   [field addGroup:group3b];
   [set3 addField:field];

   TestEmptyMessage* source1 = [TestEmptyMessage message];
   [source1 setUnknownFields:set1];
   TestEmptyMessage* source2 = [TestEmptyMessage message];
   [source2 setUnknownFields:set2];
   TestEmptyMessage* source3 = [TestEmptyMessage message];
   [source3 setUnknownFields:set3];

   TestEmptyMessage* destination1 = [TestEmptyMessage message];
   [destination1 mergeFrom:source1];
   [destination1 mergeFrom:source2];

   TestEmptyMessage* destination2 = [TestEmptyMessage message];
   [destination2 mergeFrom:source3];

   XCTAssertEqualObjects(destination1.data, destination2.data);
   XCTAssertEqualObjects(destination1.data, source3.data);
   XCTAssertEqualObjects(destination2.data, source3.data);
 }

 - (void)testClearMessage {
   TestEmptyMessage* message = [TestEmptyMessage message];
   [message mergeFrom:emptyMessage_];
   [message clear];
   XCTAssertEqual(message.serializedSize, (size_t)0);
 }

 - (void)testParseKnownAndUnknown {
   // Test mixing known and unknown fields when parsing.
   GPBUnknownFieldSet* fields = [[unknownFields_ copy] autorelease];
   GPBUnknownField* field = [[[GPBUnknownField alloc] initWithNumber:123456] autorelease];
   [field addVarint:654321];
   [fields addField:field];

   NSData* data = fields.data;
   TestAllTypes* destination = [TestAllTypes parseFromData:data error:NULL];

   [self assertAllFieldsSet:destination repeatedCount:kGPBDefaultRepeatCount];
   XCTAssertEqual(destination.unknownFields.countOfFields, (NSUInteger)1);

   GPBUnknownField* field2 = [destination.unknownFields getField:123456];
   XCTAssertEqual(field2.varintList.count, (NSUInteger)1);
   XCTAssertEqual(654321ULL, [field2.varintList valueAtIndex:0]);
 }

 - (void)testWrongTypeTreatedAsUnknown {
   // Test that fields of the wrong wire type are treated like unknown fields
   // when parsing.

   NSData* bizarroData = [self getBizarroData];
   TestAllTypes* allTypesMessage = [TestAllTypes parseFromData:bizarroData error:NULL];
   TestEmptyMessage* emptyMessage = [TestEmptyMessage parseFromData:bizarroData error:NULL];

   // All fields should have been interpreted as unknown, so the debug strings
   // should be the same.
   XCTAssertEqualObjects(emptyMessage.data, allTypesMessage.data);
 }

 - (void)testUnknownExtensions {
   // Make sure fields are properly parsed to the UnknownFieldSet even when
   // they are declared as extension numbers.

   TestEmptyMessageWithExtensions* message =
       [TestEmptyMessageWithExtensions parseFromData:allFieldsData_ error:NULL];

   XCTAssertEqual(unknownFields_.countOfFields, message.unknownFields.countOfFields);
   XCTAssertEqualObjects(allFieldsData_, message.data);

   // Just confirm as known extensions, they don't go into unknown data and end up in the
   // extensions dictionary.
   TestAllExtensions* allExtensionsMessage =
       [TestAllExtensions parseFromData:allFieldsData_
                      extensionRegistry:[UnittestRoot extensionRegistry]
                                  error:NULL];
   XCTAssertEqual(allExtensionsMessage.unknownFields.countOfFields, (NSUInteger)0);
   XCTAssertEqualObjects([allExtensionsMessage data], allFieldsData_);
 }

 - (void)testWrongExtensionTypeTreatedAsUnknown {
   // Test that fields of the wrong wire type are treated like unknown fields
   // when parsing extensions.

   NSData* bizarroData = [self getBizarroData];
   TestAllExtensions* allExtensionsMessage =
       [TestAllExtensions parseFromData:bizarroData
                      extensionRegistry:[UnittestRoot extensionRegistry]
                                  error:NULL];
   TestEmptyMessage* emptyMessage = [TestEmptyMessage parseFromData:bizarroData error:NULL];

   // All fields should have been interpreted as unknown, so the debug strings
   // should be the same.
   XCTAssertEqualObjects(emptyMessage.data, allExtensionsMessage.data);
 }

 - (void)testLargeVarint {
   GPBUnknownFieldSet* fields = [[unknownFields_ copy] autorelease];
   GPBUnknownField* field = [[[GPBUnknownField alloc] initWithNumber:1] autorelease];
   [field addVarint:0x7FFFFFFFFFFFFFFFL];
   [fields addField:field];

   NSData* data = [fields data];

   GPBUnknownFieldSet* parsed = [[[GPBUnknownFieldSet alloc] init] autorelease];
   GPBCodedInputStream* input = [[[GPBCodedInputStream alloc] initWithData:data] autorelease];
   [parsed mergeFromCodedInputStream:input];
   GPBUnknownField* field2 = [parsed getField:1];
   XCTAssertEqual(field2.varintList.count, (NSUInteger)1);
   XCTAssertEqual(0x7FFFFFFFFFFFFFFFULL, [field2.varintList valueAtIndex:0]);
 }

 #pragma mark - Field tests
 // Some tests directly on fields since the dictionary in FieldSet can gate
 // testing some of these.

 - (void)testFieldEqualityAndHash {
   GPBUnknownField* field1 = [[[GPBUnknownField alloc] initWithNumber:1] autorelease];
   XCTAssertTrue([field1 isEqual:field1]);
   XCTAssertFalse([field1 isEqual:@"foo"]);
   GPBUnknownField* field2 = [[[GPBUnknownField alloc] initWithNumber:2] autorelease];
   XCTAssertNotEqualObjects(field1, field2);

   field2 = [[[GPBUnknownField alloc] initWithNumber:1] autorelease];
   XCTAssertEqualObjects(field1, field2);
   XCTAssertEqual([field1 hash], [field2 hash]);

   // Varint

   [field1 addVarint:10];
   XCTAssertNotEqualObjects(field1, field2);
   [field2 addVarint:10];
   XCTAssertEqualObjects(field1, field2);
   XCTAssertEqual([field1 hash], [field2 hash]);
   [field1 addVarint:11];
   XCTAssertNotEqualObjects(field1, field2);
   [field2 addVarint:11];
   XCTAssertEqualObjects(field1, field2);
   XCTAssertEqual([field1 hash], [field2 hash]);

   // Fixed32

   [field1 addFixed32:20];
   XCTAssertNotEqualObjects(field1, field2);
   [field2 addFixed32:20];
   XCTAssertEqualObjects(field1, field2);
   XCTAssertEqual([field1 hash], [field2 hash]);
   [field1 addFixed32:21];
   XCTAssertNotEqualObjects(field1, field2);
   [field2 addFixed32:21];
   XCTAssertEqualObjects(field1, field2);
   XCTAssertEqual([field1 hash], [field2 hash]);

   // Fixed64

   [field1 addFixed64:30];
   XCTAssertNotEqualObjects(field1, field2);
   [field2 addFixed64:30];
   XCTAssertEqualObjects(field1, field2);
   XCTAssertEqual([field1 hash], [field2 hash]);
   [field1 addFixed64:31];
   XCTAssertNotEqualObjects(field1, field2);
   [field2 addFixed64:31];
   XCTAssertEqualObjects(field1, field2);
   XCTAssertEqual([field1 hash], [field2 hash]);

   // LengthDelimited

   [field1 addLengthDelimited:DataFromCStr("foo")];
   XCTAssertNotEqualObjects(field1, field2);
   [field2 addLengthDelimited:DataFromCStr("foo")];
   XCTAssertEqualObjects(field1, field2);
   XCTAssertEqual([field1 hash], [field2 hash]);
   [field1 addLengthDelimited:DataFromCStr("bar")];
   XCTAssertNotEqualObjects(field1, field2);
   [field2 addLengthDelimited:DataFromCStr("bar")];
   XCTAssertEqualObjects(field1, field2);
   XCTAssertEqual([field1 hash], [field2 hash]);

   // Group

   GPBUnknownFieldSet* group = [[[GPBUnknownFieldSet alloc] init] autorelease];
   GPBUnknownField* fieldGroup = [[[GPBUnknownField alloc] initWithNumber:100] autorelease];
   [fieldGroup addVarint:100];
   [group addField:fieldGroup];
   [field1 addGroup:group];
   XCTAssertNotEqualObjects(field1, field2);
   group = [[[GPBUnknownFieldSet alloc] init] autorelease];
   fieldGroup = [[[GPBUnknownField alloc] initWithNumber:100] autorelease];
   [fieldGroup addVarint:100];
   [group addField:fieldGroup];
   [field2 addGroup:group];
   XCTAssertEqualObjects(field1, field2);
   XCTAssertEqual([field1 hash], [field2 hash]);

   group = [[[GPBUnknownFieldSet alloc] init] autorelease];
   fieldGroup = [[[GPBUnknownField alloc] initWithNumber:101] autorelease];
   [fieldGroup addVarint:101];
   [group addField:fieldGroup];
   [field1 addGroup:group];
   XCTAssertNotEqualObjects(field1, field2);
   group = [[[GPBUnknownFieldSet alloc] init] autorelease];
   fieldGroup = [[[GPBUnknownField alloc] initWithNumber:101] autorelease];
   [fieldGroup addVarint:101];
   [group addField:fieldGroup];
   [field2 addGroup:group];
   XCTAssertEqualObjects(field1, field2);
   XCTAssertEqual([field1 hash], [field2 hash]);

   // Exercise description for completeness.
   XCTAssertTrue(field1.description.length > 10);
 }

 - (void)testMergingFields {
   GPBUnknownField* field1 = [[[GPBUnknownField alloc] initWithNumber:1] autorelease];
   [field1 addVarint:1];
   [field1 addFixed32:2];
   [field1 addFixed64:3];
   [field1 addLengthDelimited:[NSData dataWithBytes:"hello" length:5]];
   [field1 addGroup:[[unknownFields_ copy] autorelease]];
   GPBUnknownField* field2 = [[[GPBUnknownField alloc] initWithNumber:1] autorelease];
   [field2 mergeFromField:field1];
 }

 @end
	// Protocol Buffers - Google's data interchange format
	// Copyright 2008 Google Inc. All rights reserved.
	//
	// Use of this source code is governed by a BSD-style
	// license that can be found in the LICENSE file or at
	// https://developers.google.com/open-source/licenses/bsd

	#import "GPBTestUtilities.h"

	#import "GPBUnknownFieldSet_PackagePrivate.h"
	#import "GPBUnknownField_PackagePrivate.h"
	#import "objectivec/Tests/Unittest.pbobjc.h"

	@interface GPBUnknownFieldSet (GPBUnknownFieldSetTest)
	- (void)getTags:(int32_t*)tags;
	@end

	@interface UnknownFieldSetTest : GPBTestCase {
	@private
	TestAllTypes* allFields_;
	NSData* allFieldsData_;

	// An empty message that has been parsed from allFieldsData. So, it has
	// unknown fields of every type.
	TestEmptyMessage* emptyMessage_;
	GPBUnknownFieldSet* unknownFields_;
	}

	@end

	@implementation UnknownFieldSetTest

	- (void)setUp {
	allFields_ = [self allSetRepeatedCount:kGPBDefaultRepeatCount];
	allFieldsData_ = [allFields_ data];
	emptyMessage_ = [TestEmptyMessage parseFromData:allFieldsData_ error:NULL];
	unknownFields_ = emptyMessage_.unknownFields;
	}

	- (void)testInvalidFieldNumber {
	GPBUnknownFieldSet* set = [[[GPBUnknownFieldSet alloc] init] autorelease];
	GPBUnknownField* field = [[[GPBUnknownField alloc] initWithNumber:0] autorelease];
	XCTAssertThrowsSpecificNamed([set addField:field], NSException, NSInvalidArgumentException);
	}

	- (void)testEqualityAndHash {
	// Empty

	GPBUnknownFieldSet* set1 = [[[GPBUnknownFieldSet alloc] init] autorelease];
	XCTAssertTrue([set1 isEqual:set1]);
	XCTAssertFalse([set1 isEqual:@"foo"]);
	GPBUnknownFieldSet* set2 = [[[GPBUnknownFieldSet alloc] init] autorelease];
	XCTAssertEqualObjects(set1, set2);
	XCTAssertEqual([set1 hash], [set2 hash]);

	// Varint

	GPBUnknownField* field1 = [[[GPBUnknownField alloc] initWithNumber:1] autorelease];
	[field1 addVarint:1];
	[set1 addField:field1];
	XCTAssertNotEqualObjects(set1, set2);
	GPBUnknownField* field2 = [[[GPBUnknownField alloc] initWithNumber:1] autorelease];
	[field2 addVarint:1];
	[set2 addField:field2];
	XCTAssertEqualObjects(set1, set2);
	XCTAssertEqual([set1 hash], [set2 hash]);

	// Fixed32

	field1 = [[[GPBUnknownField alloc] initWithNumber:2] autorelease];
	[field1 addFixed32:2];
	[set1 addField:field1];
	XCTAssertNotEqualObjects(set1, set2);
	field2 = [[[GPBUnknownField alloc] initWithNumber:2] autorelease];
	[field2 addFixed32:2];
	[set2 addField:field2];
	XCTAssertEqualObjects(set1, set2);
	XCTAssertEqual([set1 hash], [set2 hash]);

	// Fixed64

	field1 = [[[GPBUnknownField alloc] initWithNumber:3] autorelease];
	[field1 addFixed64:3];
	[set1 addField:field1];
	XCTAssertNotEqualObjects(set1, set2);
	field2 = [[[GPBUnknownField alloc] initWithNumber:3] autorelease];
	[field2 addFixed64:3];
	[set2 addField:field2];
	XCTAssertEqualObjects(set1, set2);
	XCTAssertEqual([set1 hash], [set2 hash]);

	// LengthDelimited

	field1 = [[[GPBUnknownField alloc] initWithNumber:4] autorelease];
	[field1 addLengthDelimited:DataFromCStr("foo")];
	[set1 addField:field1];
	XCTAssertNotEqualObjects(set1, set2);
	field2 = [[[GPBUnknownField alloc] initWithNumber:4] autorelease];
	[field2 addLengthDelimited:DataFromCStr("foo")];
	[set2 addField:field2];
	XCTAssertEqualObjects(set1, set2);
	XCTAssertEqual([set1 hash], [set2 hash]);

	// Group

	GPBUnknownFieldSet* group1 = [[[GPBUnknownFieldSet alloc] init] autorelease];
	GPBUnknownField* fieldGroup1 = [[[GPBUnknownField alloc] initWithNumber:10] autorelease];
	[fieldGroup1 addVarint:1];
	[group1 addField:fieldGroup1];
	GPBUnknownFieldSet* group2 = [[[GPBUnknownFieldSet alloc] init] autorelease];
	GPBUnknownField* fieldGroup2 = [[[GPBUnknownField alloc] initWithNumber:10] autorelease];
	[fieldGroup2 addVarint:1];
	[group2 addField:fieldGroup2];

	field1 = [[[GPBUnknownField alloc] initWithNumber:5] autorelease];
	[field1 addGroup:group1];
	[set1 addField:field1];
	XCTAssertNotEqualObjects(set1, set2);
	field2 = [[[GPBUnknownField alloc] initWithNumber:5] autorelease];
	[field2 addGroup:group2];
	[set2 addField:field2];
	XCTAssertEqualObjects(set1, set2);
	XCTAssertEqual([set1 hash], [set2 hash]);

	// Exercise description for completeness.
	XCTAssertTrue(set1.description.length > 10);
	}

	// Constructs a protocol buffer which contains fields with all the same
	// numbers as allFieldsData except that each field is some other wire
	// type.
	- (NSData*)getBizarroData {
	GPBUnknownFieldSet* bizarroFields = [[[GPBUnknownFieldSet alloc] init] autorelease];
	NSUInteger count = [unknownFields_ countOfFields];
	int32_t* tags = malloc(count * sizeof(int32_t));
	if (!tags) {
	XCTFail(@"Failed to make scratch buffer for testing");
	return [NSData data];
	}
	@try {
	[unknownFields_ getTags:tags];
	for (NSUInteger i = 0; i < count; ++i) {
	int32_t tag = tags[i];
	GPBUnknownField* field = [unknownFields_ getField:tag];
	if (field.varintList.count == 0) {
	// Original field is not a varint, so use a varint.
	GPBUnknownField* varintField = [[[GPBUnknownField alloc] initWithNumber:tag] autorelease];
	[varintField addVarint:1];
	[bizarroFields addField:varintField];
	} else {
	// Original field is a varint, so use something else.
	GPBUnknownField* fixed32Field = [[[GPBUnknownField alloc] initWithNumber:tag] autorelease];
	[fixed32Field addFixed32:1];
	[bizarroFields addField:fixed32Field];
	}
	}
	} @finally {
	free(tags);
	}

	return [bizarroFields data];
	}

	- (void)testSerialize {
	// Check that serializing the UnknownFieldSet produces the original data
	// again.
	NSData* data = [emptyMessage_ data];
	XCTAssertEqualObjects(allFieldsData_, data);
	}

	- (void)testCopyFrom {
	TestEmptyMessage* message = [TestEmptyMessage message];
	[message mergeFrom:emptyMessage_];

	XCTAssertEqualObjects(emptyMessage_.data, message.data);
	}

	- (void)testMergeFrom {
	GPBUnknownFieldSet* set1 = [[[GPBUnknownFieldSet alloc] init] autorelease];
	GPBUnknownField* field = [[[GPBUnknownField alloc] initWithNumber:2] autorelease];
	[field addVarint:2];
	[set1 addField:field];
	field = [[[GPBUnknownField alloc] initWithNumber:3] autorelease];
	[field addVarint:4];
	[set1 addField:field];
	field = [[[GPBUnknownField alloc] initWithNumber:4] autorelease];
	[field addFixed32:6];
	[set1 addField:field];
	field = [[[GPBUnknownField alloc] initWithNumber:5] autorelease];
	[field addFixed64:20];
	[set1 addField:field];
	field = [[[GPBUnknownField alloc] initWithNumber:10] autorelease];
	[field addLengthDelimited:DataFromCStr("data1")];
	[set1 addField:field];

	GPBUnknownFieldSet* group1 = [[[GPBUnknownFieldSet alloc] init] autorelease];
	GPBUnknownField* fieldGroup1 = [[[GPBUnknownField alloc] initWithNumber:200] autorelease];
	[fieldGroup1 addVarint:100];
	[group1 addField:fieldGroup1];

	field = [[[GPBUnknownField alloc] initWithNumber:11] autorelease];
	[field addGroup:group1];
	[set1 addField:field];

	GPBUnknownFieldSet* set2 = [[[GPBUnknownFieldSet alloc] init] autorelease];
	field = [[[GPBUnknownField alloc] initWithNumber:1] autorelease];
	[field addVarint:1];
	[set2 addField:field];
	field = [[[GPBUnknownField alloc] initWithNumber:3] autorelease];
	[field addVarint:3];
	[set2 addField:field];
	field = [[[GPBUnknownField alloc] initWithNumber:4] autorelease];
	[field addFixed32:7];
	[set2 addField:field];
	field = [[[GPBUnknownField alloc] initWithNumber:5] autorelease];
	[field addFixed64:30];
	[set2 addField:field];
	field = [[[GPBUnknownField alloc] initWithNumber:10] autorelease];
	[field addLengthDelimited:DataFromCStr("data2")];
	[set2 addField:field];

	GPBUnknownFieldSet* group2 = [[[GPBUnknownFieldSet alloc] init] autorelease];
	GPBUnknownField* fieldGroup2 = [[[GPBUnknownField alloc] initWithNumber:201] autorelease];
	[fieldGroup2 addVarint:99];
	[group2 addField:fieldGroup2];

	field = [[[GPBUnknownField alloc] initWithNumber:11] autorelease];
	[field addGroup:group2];
	[set2 addField:field];

	GPBUnknownFieldSet* set3 = [[[GPBUnknownFieldSet alloc] init] autorelease];
	field = [[[GPBUnknownField alloc] initWithNumber:1] autorelease];
	[field addVarint:1];
	[set3 addField:field];
	field = [[[GPBUnknownField alloc] initWithNumber:2] autorelease];
	[field addVarint:2];
	[set3 addField:field];
	field = [[[GPBUnknownField alloc] initWithNumber:3] autorelease];
	[field addVarint:4];
	[set3 addField:field];
	[field addVarint:3];
	[set3 addField:field];
	field = [[[GPBUnknownField alloc] initWithNumber:4] autorelease];
	[field addFixed32:6];
	[field addFixed32:7];
	[set3 addField:field];
	field = [[[GPBUnknownField alloc] initWithNumber:5] autorelease];
	[field addFixed64:20];
	[field addFixed64:30];
	[set3 addField:field];
	field = [[[GPBUnknownField alloc] initWithNumber:10] autorelease];
	[field addLengthDelimited:DataFromCStr("data1")];
	[field addLengthDelimited:DataFromCStr("data2")];
	[set3 addField:field];

	GPBUnknownFieldSet* group3a = [[[GPBUnknownFieldSet alloc] init] autorelease];
	GPBUnknownField* fieldGroup3a1 = [[[GPBUnknownField alloc] initWithNumber:200] autorelease];
	[fieldGroup3a1 addVarint:100];
	[group3a addField:fieldGroup3a1];
	GPBUnknownFieldSet* group3b = [[[GPBUnknownFieldSet alloc] init] autorelease];
	GPBUnknownField* fieldGroup3b2 = [[[GPBUnknownField alloc] initWithNumber:201] autorelease];
	[fieldGroup3b2 addVarint:99];
	[group3b addField:fieldGroup3b2];

	field = [[[GPBUnknownField alloc] initWithNumber:11] autorelease];
	[field addGroup:group1];
	[field addGroup:group3b];
	[set3 addField:field];

	TestEmptyMessage* source1 = [TestEmptyMessage message];
	[source1 setUnknownFields:set1];
	TestEmptyMessage* source2 = [TestEmptyMessage message];
	[source2 setUnknownFields:set2];
	TestEmptyMessage* source3 = [TestEmptyMessage message];
	[source3 setUnknownFields:set3];

	TestEmptyMessage* destination1 = [TestEmptyMessage message];
	[destination1 mergeFrom:source1];
	[destination1 mergeFrom:source2];

	TestEmptyMessage* destination2 = [TestEmptyMessage message];
	[destination2 mergeFrom:source3];

	XCTAssertEqualObjects(destination1.data, destination2.data);
	XCTAssertEqualObjects(destination1.data, source3.data);
	XCTAssertEqualObjects(destination2.data, source3.data);
	}

	- (void)testClearMessage {
	TestEmptyMessage* message = [TestEmptyMessage message];
	[message mergeFrom:emptyMessage_];
	[message clear];
	XCTAssertEqual(message.serializedSize, (size_t)0);
	}

	- (void)testParseKnownAndUnknown {
	// Test mixing known and unknown fields when parsing.
	GPBUnknownFieldSet* fields = [[unknownFields_ copy] autorelease];
	GPBUnknownField* field = [[[GPBUnknownField alloc] initWithNumber:123456] autorelease];
	[field addVarint:654321];
	[fields addField:field];

	NSData* data = fields.data;
	TestAllTypes* destination = [TestAllTypes parseFromData:data error:NULL];

	[self assertAllFieldsSet:destination repeatedCount:kGPBDefaultRepeatCount];
	XCTAssertEqual(destination.unknownFields.countOfFields, (NSUInteger)1);

	GPBUnknownField* field2 = [destination.unknownFields getField:123456];
	XCTAssertEqual(field2.varintList.count, (NSUInteger)1);
	XCTAssertEqual(654321ULL, [field2.varintList valueAtIndex:0]);
	}

	- (void)testWrongTypeTreatedAsUnknown {
	// Test that fields of the wrong wire type are treated like unknown fields
	// when parsing.

	NSData* bizarroData = [self getBizarroData];
	TestAllTypes* allTypesMessage = [TestAllTypes parseFromData:bizarroData error:NULL];
	TestEmptyMessage* emptyMessage = [TestEmptyMessage parseFromData:bizarroData error:NULL];

	// All fields should have been interpreted as unknown, so the debug strings
	// should be the same.
	XCTAssertEqualObjects(emptyMessage.data, allTypesMessage.data);
	}

	- (void)testUnknownExtensions {
	// Make sure fields are properly parsed to the UnknownFieldSet even when
	// they are declared as extension numbers.

	TestEmptyMessageWithExtensions* message =
	[TestEmptyMessageWithExtensions parseFromData:allFieldsData_ error:NULL];

	XCTAssertEqual(unknownFields_.countOfFields, message.unknownFields.countOfFields);
	XCTAssertEqualObjects(allFieldsData_, message.data);

	// Just confirm as known extensions, they don't go into unknown data and end up in the
	// extensions dictionary.
	TestAllExtensions* allExtensionsMessage =
	[TestAllExtensions parseFromData:allFieldsData_
	extensionRegistry:[UnittestRoot extensionRegistry]
	error:NULL];
	XCTAssertEqual(allExtensionsMessage.unknownFields.countOfFields, (NSUInteger)0);
	XCTAssertEqualObjects([allExtensionsMessage data], allFieldsData_);
	}

	- (void)testWrongExtensionTypeTreatedAsUnknown {
	// Test that fields of the wrong wire type are treated like unknown fields
	// when parsing extensions.

	NSData* bizarroData = [self getBizarroData];
	TestAllExtensions* allExtensionsMessage =
	[TestAllExtensions parseFromData:bizarroData
	extensionRegistry:[UnittestRoot extensionRegistry]
	error:NULL];
	TestEmptyMessage* emptyMessage = [TestEmptyMessage parseFromData:bizarroData error:NULL];

	// All fields should have been interpreted as unknown, so the debug strings
	// should be the same.
	XCTAssertEqualObjects(emptyMessage.data, allExtensionsMessage.data);
	}

	- (void)testLargeVarint {
	GPBUnknownFieldSet* fields = [[unknownFields_ copy] autorelease];
	GPBUnknownField* field = [[[GPBUnknownField alloc] initWithNumber:1] autorelease];
	[field addVarint:0x7FFFFFFFFFFFFFFFL];
	[fields addField:field];

	NSData* data = [fields data];

	GPBUnknownFieldSet* parsed = [[[GPBUnknownFieldSet alloc] init] autorelease];
	GPBCodedInputStream* input = [[[GPBCodedInputStream alloc] initWithData:data] autorelease];
	[parsed mergeFromCodedInputStream:input];
	GPBUnknownField* field2 = [parsed getField:1];
	XCTAssertEqual(field2.varintList.count, (NSUInteger)1);
	XCTAssertEqual(0x7FFFFFFFFFFFFFFFULL, [field2.varintList valueAtIndex:0]);
	}

	#pragma mark - Field tests
	// Some tests directly on fields since the dictionary in FieldSet can gate
	// testing some of these.

	- (void)testFieldEqualityAndHash {
	GPBUnknownField* field1 = [[[GPBUnknownField alloc] initWithNumber:1] autorelease];
	XCTAssertTrue([field1 isEqual:field1]);
	XCTAssertFalse([field1 isEqual:@"foo"]);
	GPBUnknownField* field2 = [[[GPBUnknownField alloc] initWithNumber:2] autorelease];
	XCTAssertNotEqualObjects(field1, field2);

	field2 = [[[GPBUnknownField alloc] initWithNumber:1] autorelease];
	XCTAssertEqualObjects(field1, field2);
	XCTAssertEqual([field1 hash], [field2 hash]);

	// Varint

	[field1 addVarint:10];
	XCTAssertNotEqualObjects(field1, field2);
	[field2 addVarint:10];
	XCTAssertEqualObjects(field1, field2);
	XCTAssertEqual([field1 hash], [field2 hash]);
	[field1 addVarint:11];
	XCTAssertNotEqualObjects(field1, field2);
	[field2 addVarint:11];
	XCTAssertEqualObjects(field1, field2);
	XCTAssertEqual([field1 hash], [field2 hash]);

	// Fixed32

	[field1 addFixed32:20];
	XCTAssertNotEqualObjects(field1, field2);
	[field2 addFixed32:20];
	XCTAssertEqualObjects(field1, field2);
	XCTAssertEqual([field1 hash], [field2 hash]);
	[field1 addFixed32:21];
	XCTAssertNotEqualObjects(field1, field2);
	[field2 addFixed32:21];
	XCTAssertEqualObjects(field1, field2);
	XCTAssertEqual([field1 hash], [field2 hash]);

	// Fixed64

	[field1 addFixed64:30];
	XCTAssertNotEqualObjects(field1, field2);
	[field2 addFixed64:30];
	XCTAssertEqualObjects(field1, field2);
	XCTAssertEqual([field1 hash], [field2 hash]);
	[field1 addFixed64:31];
	XCTAssertNotEqualObjects(field1, field2);
	[field2 addFixed64:31];
	XCTAssertEqualObjects(field1, field2);
	XCTAssertEqual([field1 hash], [field2 hash]);

	// LengthDelimited

	[field1 addLengthDelimited:DataFromCStr("foo")];
	XCTAssertNotEqualObjects(field1, field2);
	[field2 addLengthDelimited:DataFromCStr("foo")];
	XCTAssertEqualObjects(field1, field2);
	XCTAssertEqual([field1 hash], [field2 hash]);
	[field1 addLengthDelimited:DataFromCStr("bar")];
	XCTAssertNotEqualObjects(field1, field2);
	[field2 addLengthDelimited:DataFromCStr("bar")];
	XCTAssertEqualObjects(field1, field2);
	XCTAssertEqual([field1 hash], [field2 hash]);

	// Group

	GPBUnknownFieldSet* group = [[[GPBUnknownFieldSet alloc] init] autorelease];
	GPBUnknownField* fieldGroup = [[[GPBUnknownField alloc] initWithNumber:100] autorelease];
	[fieldGroup addVarint:100];
	[group addField:fieldGroup];
	[field1 addGroup:group];
	XCTAssertNotEqualObjects(field1, field2);
	group = [[[GPBUnknownFieldSet alloc] init] autorelease];
	fieldGroup = [[[GPBUnknownField alloc] initWithNumber:100] autorelease];
	[fieldGroup addVarint:100];
	[group addField:fieldGroup];
	[field2 addGroup:group];
	XCTAssertEqualObjects(field1, field2);
	XCTAssertEqual([field1 hash], [field2 hash]);

	group = [[[GPBUnknownFieldSet alloc] init] autorelease];
	fieldGroup = [[[GPBUnknownField alloc] initWithNumber:101] autorelease];
	[fieldGroup addVarint:101];
	[group addField:fieldGroup];
	[field1 addGroup:group];
	XCTAssertNotEqualObjects(field1, field2);
	group = [[[GPBUnknownFieldSet alloc] init] autorelease];
	fieldGroup = [[[GPBUnknownField alloc] initWithNumber:101] autorelease];
	[fieldGroup addVarint:101];
	[group addField:fieldGroup];
	[field2 addGroup:group];
	XCTAssertEqualObjects(field1, field2);
	XCTAssertEqual([field1 hash], [field2 hash]);

	// Exercise description for completeness.
	XCTAssertTrue(field1.description.length > 10);
	}

	- (void)testMergingFields {
	GPBUnknownField* field1 = [[[GPBUnknownField alloc] initWithNumber:1] autorelease];
	[field1 addVarint:1];
	[field1 addFixed32:2];
	[field1 addFixed64:3];
	[field1 addLengthDelimited:[NSData dataWithBytes:"hello" length:5]];
	[field1 addGroup:[[unknownFields_ copy] autorelease]];
	GPBUnknownField* field2 = [[[GPBUnknownField alloc] initWithNumber:1] autorelease];
	[field2 mergeFromField:field1];
	}

	@end