csharp/src/ProtocolBuffers.Test/DescriptorsTest.cs - third_party/github/protocolbuffers/protobuf - Git at Google

 #region Copyright notice and license

 // Protocol Buffers - Google's data interchange format
 // Copyright 2008 Google Inc.  All rights reserved.
 // http://github.com/jskeet/dotnet-protobufs/
 // Original C++/Java/Python code:
 // http://code.google.com/p/protobuf/
 //
 // 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.

 #endregion

 using Google.ProtocolBuffers.Descriptors;
 using Google.ProtocolBuffers.TestProtos;
 using Xunit;

 namespace Google.ProtocolBuffers
 {
     /// <summary>
     /// Tests for descriptors. (Not in its own namespace or broken up into individual classes as the
     /// size doesn't warrant it. On the other hand, this makes me feel a bit dirty...)
     /// </summary>
     public class DescriptorsTest
     {
         [Fact]
         public void FileDescriptor()
         {
             FileDescriptor file = Unittest.Descriptor;

             Assert.Equal("google/protobuf/unittest.proto", file.Name);
             Assert.Equal("protobuf_unittest", file.Package);

             Assert.Equal("UnittestProto", file.Options.JavaOuterClassname);
             Assert.Equal("google/protobuf/unittest.proto", file.Proto.Name);

             // unittest.proto doesn't have any public imports, but unittest_import.proto does.
             Assert.Equal(0, file.PublicDependencies.Count);
             Assert.Equal(1, UnittestImport.Descriptor.PublicDependencies.Count);
             Assert.Equal(UnittestImportPublic.Descriptor, UnittestImport.Descriptor.PublicDependencies[0]);

             Assert.Equal(1, file.Dependencies.Count);
             Assert.Equal(UnittestImport.Descriptor, file.Dependencies[0]);

             MessageDescriptor messageType = TestAllTypes.Descriptor;
             Assert.Equal(messageType, file.MessageTypes[0]);
             Assert.Equal(messageType, file.FindTypeByName<MessageDescriptor>("TestAllTypes"));
             Assert.Null(file.FindTypeByName<MessageDescriptor>("NoSuchType"));
             Assert.Null(file.FindTypeByName<MessageDescriptor>("protobuf_unittest.TestAllTypes"));
             for (int i = 0; i < file.MessageTypes.Count; i++)
             {
                 Assert.Equal(i, file.MessageTypes[i].Index);
             }

             Assert.Equal(file.EnumTypes[0], file.FindTypeByName<EnumDescriptor>("ForeignEnum"));
             Assert.Null(file.FindTypeByName<EnumDescriptor>("NoSuchType"));
             Assert.Null(file.FindTypeByName<EnumDescriptor>("protobuf_unittest.ForeignEnum"));
             Assert.Equal(1, UnittestImport.Descriptor.EnumTypes.Count);
             Assert.Equal("ImportEnum", UnittestImport.Descriptor.EnumTypes[0].Name);
             for (int i = 0; i < file.EnumTypes.Count; i++)
             {
                 Assert.Equal(i, file.EnumTypes[i].Index);
             }

             FieldDescriptor extension = Unittest.OptionalInt32Extension.Descriptor;
             Assert.Equal(extension, file.Extensions[0]);
             Assert.Equal(extension, file.FindTypeByName<FieldDescriptor>("optional_int32_extension"));
             Assert.Null(file.FindTypeByName<FieldDescriptor>("no_such_ext"));
             Assert.Null(file.FindTypeByName<FieldDescriptor>("protobuf_unittest.optional_int32_extension"));
             Assert.Equal(0, UnittestImport.Descriptor.Extensions.Count);
             for (int i = 0; i < file.Extensions.Count; i++)
             {
                 Assert.Equal(i, file.Extensions[i].Index);
             }
         }

         [Fact]
         public void MessageDescriptor()
         {
             MessageDescriptor messageType = TestAllTypes.Descriptor;
             MessageDescriptor nestedType = TestAllTypes.Types.NestedMessage.Descriptor;

             Assert.Equal("TestAllTypes", messageType.Name);
             Assert.Equal("protobuf_unittest.TestAllTypes", messageType.FullName);
             Assert.Equal(Unittest.Descriptor, messageType.File);
             Assert.Null(messageType.ContainingType);
             Assert.Equal(DescriptorProtos.MessageOptions.DefaultInstance, messageType.Options);
             Assert.Equal("TestAllTypes", messageType.Proto.Name);

             Assert.Equal("NestedMessage", nestedType.Name);
             Assert.Equal("protobuf_unittest.TestAllTypes.NestedMessage", nestedType.FullName);
             Assert.Equal(Unittest.Descriptor, nestedType.File);
             Assert.Equal(messageType, nestedType.ContainingType);

             FieldDescriptor field = messageType.Fields[0];
             Assert.Equal("optional_int32", field.Name);
             Assert.Equal(field, messageType.FindDescriptor<FieldDescriptor>("optional_int32"));
             Assert.Null(messageType.FindDescriptor<FieldDescriptor>("no_such_field"));
             Assert.Equal(field, messageType.FindFieldByNumber(1));
             Assert.Null(messageType.FindFieldByNumber(571283));
             for (int i = 0; i < messageType.Fields.Count; i++)
             {
                 Assert.Equal(i, messageType.Fields[i].Index);
             }

             Assert.Equal(nestedType, messageType.NestedTypes[0]);
             Assert.Equal(nestedType, messageType.FindDescriptor<MessageDescriptor>("NestedMessage"));
             Assert.Null(messageType.FindDescriptor<MessageDescriptor>("NoSuchType"));
             for (int i = 0; i < messageType.NestedTypes.Count; i++)
             {
                 Assert.Equal(i, messageType.NestedTypes[i].Index);
             }

             Assert.Equal(messageType.EnumTypes[0], messageType.FindDescriptor<EnumDescriptor>("NestedEnum"));
             Assert.Null(messageType.FindDescriptor<EnumDescriptor>("NoSuchType"));
             for (int i = 0; i < messageType.EnumTypes.Count; i++)
             {
                 Assert.Equal(i, messageType.EnumTypes[i].Index);
             }
         }

         [Fact]
         public void FieldDescriptor()
         {
             MessageDescriptor messageType = TestAllTypes.Descriptor;
             FieldDescriptor primitiveField = messageType.FindDescriptor<FieldDescriptor>("optional_int32");
             FieldDescriptor enumField = messageType.FindDescriptor<FieldDescriptor>("optional_nested_enum");
             FieldDescriptor messageField = messageType.FindDescriptor<FieldDescriptor>("optional_foreign_message");
             FieldDescriptor cordField = messageType.FindDescriptor<FieldDescriptor>("optional_cord");
             FieldDescriptor extension = Unittest.OptionalInt32Extension.Descriptor;
             FieldDescriptor nestedExtension = TestRequired.Single.Descriptor;

             Assert.Equal("optional_int32", primitiveField.Name);
             Assert.Equal("protobuf_unittest.TestAllTypes.optional_int32",
                             primitiveField.FullName);
             Assert.Equal(1, primitiveField.FieldNumber);
             Assert.Equal(messageType, primitiveField.ContainingType);
             Assert.Equal(Unittest.Descriptor, primitiveField.File);
             Assert.Equal(FieldType.Int32, primitiveField.FieldType);
             Assert.Equal(MappedType.Int32, primitiveField.MappedType);
             Assert.Equal(DescriptorProtos.FieldOptions.DefaultInstance, primitiveField.Options);
             Assert.False(primitiveField.IsExtension);
             Assert.Equal("optional_int32", primitiveField.Proto.Name);

             Assert.Equal("optional_nested_enum", enumField.Name);
             Assert.Equal(FieldType.Enum, enumField.FieldType);
             Assert.Equal(MappedType.Enum, enumField.MappedType);
             // Assert.Equal(TestAllTypes.Types.NestedEnum.DescriptorProtoFile, enumField.EnumType);

             Assert.Equal("optional_foreign_message", messageField.Name);
             Assert.Equal(FieldType.Message, messageField.FieldType);
             Assert.Equal(MappedType.Message, messageField.MappedType);
             Assert.Equal(ForeignMessage.Descriptor, messageField.MessageType);

             Assert.Equal("optional_cord", cordField.Name);
             Assert.Equal(FieldType.String, cordField.FieldType);
             Assert.Equal(MappedType.String, cordField.MappedType);
             Assert.Equal(DescriptorProtos.FieldOptions.Types.CType.CORD, cordField.Options.Ctype);

             Assert.Equal("optional_int32_extension", extension.Name);
             Assert.Equal("protobuf_unittest.optional_int32_extension", extension.FullName);
             Assert.Equal(1, extension.FieldNumber);
             Assert.Equal(TestAllExtensions.Descriptor, extension.ContainingType);
             Assert.Equal(Unittest.Descriptor, extension.File);
             Assert.Equal(FieldType.Int32, extension.FieldType);
             Assert.Equal(MappedType.Int32, extension.MappedType);
             Assert.Equal(DescriptorProtos.FieldOptions.DefaultInstance,
                             extension.Options);
             Assert.True(extension.IsExtension);
             Assert.Equal(null, extension.ExtensionScope);
             Assert.Equal("optional_int32_extension", extension.Proto.Name);

             Assert.Equal("single", nestedExtension.Name);
             Assert.Equal("protobuf_unittest.TestRequired.single",
                             nestedExtension.FullName);
             Assert.Equal(TestRequired.Descriptor,
                             nestedExtension.ExtensionScope);
         }

         [Fact]
         public void FieldDescriptorLabel()
         {
             FieldDescriptor requiredField =
                 TestRequired.Descriptor.FindDescriptor<FieldDescriptor>("a");
             FieldDescriptor optionalField =
                 TestAllTypes.Descriptor.FindDescriptor<FieldDescriptor>("optional_int32");
             FieldDescriptor repeatedField =
                 TestAllTypes.Descriptor.FindDescriptor<FieldDescriptor>("repeated_int32");

             Assert.True(requiredField.IsRequired);
             Assert.False(requiredField.IsRepeated);
             Assert.False(optionalField.IsRequired);
             Assert.False(optionalField.IsRepeated);
             Assert.False(repeatedField.IsRequired);
             Assert.True(repeatedField.IsRepeated);
         }
         [Fact]
         public void FieldDescriptorDefault()
         {
             MessageDescriptor d = TestAllTypes.Descriptor;
             Assert.False(d.FindDescriptor<FieldDescriptor>("optional_int32").HasDefaultValue);
             Assert.Equal<object>(0, d.FindDescriptor<FieldDescriptor>("optional_int32").DefaultValue);
             Assert.True(d.FindDescriptor<FieldDescriptor>("default_int32").HasDefaultValue);
             Assert.Equal<object>(41, d.FindDescriptor<FieldDescriptor>("default_int32").DefaultValue);

             d = TestExtremeDefaultValues.Descriptor;
             Assert.Equal<object>(TestExtremeDefaultValues.DefaultInstance.EscapedBytes,
                 d.FindDescriptor<FieldDescriptor>("escaped_bytes").DefaultValue);

             Assert.Equal<object>(uint.MaxValue, d.FindDescriptor<FieldDescriptor>("large_uint32").DefaultValue);
             Assert.Equal<object>(ulong.MaxValue, d.FindDescriptor<FieldDescriptor>("large_uint64").DefaultValue);
         }
         [Fact]
         public void EnumDescriptor()
         {
             // Note: this test is a bit different to the Java version because there's no static way of getting to the descriptor
             EnumDescriptor enumType = Unittest.Descriptor.FindTypeByName<EnumDescriptor>("ForeignEnum");
             EnumDescriptor nestedType = TestAllTypes.Descriptor.FindDescriptor<EnumDescriptor>("NestedEnum");

             Assert.Equal("ForeignEnum", enumType.Name);
             Assert.Equal("protobuf_unittest.ForeignEnum", enumType.FullName);
             Assert.Equal(Unittest.Descriptor, enumType.File);
             Assert.Null(enumType.ContainingType);
             Assert.Equal(DescriptorProtos.EnumOptions.DefaultInstance,
                             enumType.Options);

             Assert.Equal("NestedEnum", nestedType.Name);
             Assert.Equal("protobuf_unittest.TestAllTypes.NestedEnum",
                             nestedType.FullName);
             Assert.Equal(Unittest.Descriptor, nestedType.File);
             Assert.Equal(TestAllTypes.Descriptor, nestedType.ContainingType);

             EnumValueDescriptor value = enumType.FindValueByName("FOREIGN_FOO");
             Assert.Equal(value, enumType.Values[0]);
             Assert.Equal("FOREIGN_FOO", value.Name);
             Assert.Equal(4, value.Number);
             Assert.Equal((int) ForeignEnum.FOREIGN_FOO, value.Number);
             Assert.Equal(value, enumType.FindValueByNumber(4));
             Assert.Null(enumType.FindValueByName("NO_SUCH_VALUE"));
             for (int i = 0; i < enumType.Values.Count; i++)
             {
                 Assert.Equal(i, enumType.Values[i].Index);
             }
         }


         [Fact]
         public void CustomOptions()
         {
             MessageDescriptor descriptor = TestMessageWithCustomOptions.Descriptor;
             Assert.True(descriptor.Options.HasExtension(UnittestCustomOptions.MessageOpt1));
             Assert.Equal(-56, descriptor.Options.GetExtension(UnittestCustomOptions.MessageOpt1));


             FieldDescriptor field = descriptor.FindFieldByName("field1");
             Assert.NotNull(field);

             Assert.True(field.Options.HasExtension(UnittestCustomOptions.FieldOpt1));
             Assert.Equal(8765432109uL, field.Options.GetExtension(UnittestCustomOptions.FieldOpt1));

         }
     }
 }
	#region Copyright notice and license

	// Protocol Buffers - Google's data interchange format
	// Copyright 2008 Google Inc. All rights reserved.
	// http://github.com/jskeet/dotnet-protobufs/
	// Original C++/Java/Python code:
	// http://code.google.com/p/protobuf/
	//
	// 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.

	#endregion

	using Google.ProtocolBuffers.Descriptors;
	using Google.ProtocolBuffers.TestProtos;
	using Xunit;

	namespace Google.ProtocolBuffers
	{
	/// <summary>
	/// Tests for descriptors. (Not in its own namespace or broken up into individual classes as the
	/// size doesn't warrant it. On the other hand, this makes me feel a bit dirty...)
	/// </summary>
	public class DescriptorsTest
	{
	[Fact]
	public void FileDescriptor()
	{
	FileDescriptor file = Unittest.Descriptor;

	Assert.Equal("google/protobuf/unittest.proto", file.Name);
	Assert.Equal("protobuf_unittest", file.Package);

	Assert.Equal("UnittestProto", file.Options.JavaOuterClassname);
	Assert.Equal("google/protobuf/unittest.proto", file.Proto.Name);

	// unittest.proto doesn't have any public imports, but unittest_import.proto does.
	Assert.Equal(0, file.PublicDependencies.Count);
	Assert.Equal(1, UnittestImport.Descriptor.PublicDependencies.Count);
	Assert.Equal(UnittestImportPublic.Descriptor, UnittestImport.Descriptor.PublicDependencies[0]);

	Assert.Equal(1, file.Dependencies.Count);
	Assert.Equal(UnittestImport.Descriptor, file.Dependencies[0]);

	MessageDescriptor messageType = TestAllTypes.Descriptor;
	Assert.Equal(messageType, file.MessageTypes[0]);
	Assert.Equal(messageType, file.FindTypeByName<MessageDescriptor>("TestAllTypes"));
	Assert.Null(file.FindTypeByName<MessageDescriptor>("NoSuchType"));
	Assert.Null(file.FindTypeByName<MessageDescriptor>("protobuf_unittest.TestAllTypes"));
	for (int i = 0; i < file.MessageTypes.Count; i++)
	{
	Assert.Equal(i, file.MessageTypes[i].Index);
	}

	Assert.Equal(file.EnumTypes[0], file.FindTypeByName<EnumDescriptor>("ForeignEnum"));
	Assert.Null(file.FindTypeByName<EnumDescriptor>("NoSuchType"));
	Assert.Null(file.FindTypeByName<EnumDescriptor>("protobuf_unittest.ForeignEnum"));
	Assert.Equal(1, UnittestImport.Descriptor.EnumTypes.Count);
	Assert.Equal("ImportEnum", UnittestImport.Descriptor.EnumTypes[0].Name);
	for (int i = 0; i < file.EnumTypes.Count; i++)
	{
	Assert.Equal(i, file.EnumTypes[i].Index);
	}

	FieldDescriptor extension = Unittest.OptionalInt32Extension.Descriptor;
	Assert.Equal(extension, file.Extensions[0]);
	Assert.Equal(extension, file.FindTypeByName<FieldDescriptor>("optional_int32_extension"));
	Assert.Null(file.FindTypeByName<FieldDescriptor>("no_such_ext"));
	Assert.Null(file.FindTypeByName<FieldDescriptor>("protobuf_unittest.optional_int32_extension"));
	Assert.Equal(0, UnittestImport.Descriptor.Extensions.Count);
	for (int i = 0; i < file.Extensions.Count; i++)
	{
	Assert.Equal(i, file.Extensions[i].Index);
	}
	}

	[Fact]
	public void MessageDescriptor()
	{
	MessageDescriptor messageType = TestAllTypes.Descriptor;
	MessageDescriptor nestedType = TestAllTypes.Types.NestedMessage.Descriptor;

	Assert.Equal("TestAllTypes", messageType.Name);
	Assert.Equal("protobuf_unittest.TestAllTypes", messageType.FullName);
	Assert.Equal(Unittest.Descriptor, messageType.File);
	Assert.Null(messageType.ContainingType);
	Assert.Equal(DescriptorProtos.MessageOptions.DefaultInstance, messageType.Options);
	Assert.Equal("TestAllTypes", messageType.Proto.Name);

	Assert.Equal("NestedMessage", nestedType.Name);
	Assert.Equal("protobuf_unittest.TestAllTypes.NestedMessage", nestedType.FullName);
	Assert.Equal(Unittest.Descriptor, nestedType.File);
	Assert.Equal(messageType, nestedType.ContainingType);

	FieldDescriptor field = messageType.Fields[0];
	Assert.Equal("optional_int32", field.Name);
	Assert.Equal(field, messageType.FindDescriptor<FieldDescriptor>("optional_int32"));
	Assert.Null(messageType.FindDescriptor<FieldDescriptor>("no_such_field"));
	Assert.Equal(field, messageType.FindFieldByNumber(1));
	Assert.Null(messageType.FindFieldByNumber(571283));
	for (int i = 0; i < messageType.Fields.Count; i++)
	{
	Assert.Equal(i, messageType.Fields[i].Index);
	}

	Assert.Equal(nestedType, messageType.NestedTypes[0]);
	Assert.Equal(nestedType, messageType.FindDescriptor<MessageDescriptor>("NestedMessage"));
	Assert.Null(messageType.FindDescriptor<MessageDescriptor>("NoSuchType"));
	for (int i = 0; i < messageType.NestedTypes.Count; i++)
	{
	Assert.Equal(i, messageType.NestedTypes[i].Index);
	}

	Assert.Equal(messageType.EnumTypes[0], messageType.FindDescriptor<EnumDescriptor>("NestedEnum"));
	Assert.Null(messageType.FindDescriptor<EnumDescriptor>("NoSuchType"));
	for (int i = 0; i < messageType.EnumTypes.Count; i++)
	{
	Assert.Equal(i, messageType.EnumTypes[i].Index);
	}
	}

	[Fact]
	public void FieldDescriptor()
	{
	MessageDescriptor messageType = TestAllTypes.Descriptor;
	FieldDescriptor primitiveField = messageType.FindDescriptor<FieldDescriptor>("optional_int32");
	FieldDescriptor enumField = messageType.FindDescriptor<FieldDescriptor>("optional_nested_enum");
	FieldDescriptor messageField = messageType.FindDescriptor<FieldDescriptor>("optional_foreign_message");
	FieldDescriptor cordField = messageType.FindDescriptor<FieldDescriptor>("optional_cord");
	FieldDescriptor extension = Unittest.OptionalInt32Extension.Descriptor;
	FieldDescriptor nestedExtension = TestRequired.Single.Descriptor;

	Assert.Equal("optional_int32", primitiveField.Name);
	Assert.Equal("protobuf_unittest.TestAllTypes.optional_int32",
	primitiveField.FullName);
	Assert.Equal(1, primitiveField.FieldNumber);
	Assert.Equal(messageType, primitiveField.ContainingType);
	Assert.Equal(Unittest.Descriptor, primitiveField.File);
	Assert.Equal(FieldType.Int32, primitiveField.FieldType);
	Assert.Equal(MappedType.Int32, primitiveField.MappedType);
	Assert.Equal(DescriptorProtos.FieldOptions.DefaultInstance, primitiveField.Options);
	Assert.False(primitiveField.IsExtension);
	Assert.Equal("optional_int32", primitiveField.Proto.Name);

	Assert.Equal("optional_nested_enum", enumField.Name);
	Assert.Equal(FieldType.Enum, enumField.FieldType);
	Assert.Equal(MappedType.Enum, enumField.MappedType);
	// Assert.Equal(TestAllTypes.Types.NestedEnum.DescriptorProtoFile, enumField.EnumType);

	Assert.Equal("optional_foreign_message", messageField.Name);
	Assert.Equal(FieldType.Message, messageField.FieldType);
	Assert.Equal(MappedType.Message, messageField.MappedType);
	Assert.Equal(ForeignMessage.Descriptor, messageField.MessageType);

	Assert.Equal("optional_cord", cordField.Name);
	Assert.Equal(FieldType.String, cordField.FieldType);
	Assert.Equal(MappedType.String, cordField.MappedType);
	Assert.Equal(DescriptorProtos.FieldOptions.Types.CType.CORD, cordField.Options.Ctype);

	Assert.Equal("optional_int32_extension", extension.Name);
	Assert.Equal("protobuf_unittest.optional_int32_extension", extension.FullName);
	Assert.Equal(1, extension.FieldNumber);
	Assert.Equal(TestAllExtensions.Descriptor, extension.ContainingType);
	Assert.Equal(Unittest.Descriptor, extension.File);
	Assert.Equal(FieldType.Int32, extension.FieldType);
	Assert.Equal(MappedType.Int32, extension.MappedType);
	Assert.Equal(DescriptorProtos.FieldOptions.DefaultInstance,
	extension.Options);
	Assert.True(extension.IsExtension);
	Assert.Equal(null, extension.ExtensionScope);
	Assert.Equal("optional_int32_extension", extension.Proto.Name);

	Assert.Equal("single", nestedExtension.Name);
	Assert.Equal("protobuf_unittest.TestRequired.single",
	nestedExtension.FullName);
	Assert.Equal(TestRequired.Descriptor,
	nestedExtension.ExtensionScope);
	}

	[Fact]
	public void FieldDescriptorLabel()
	{
	FieldDescriptor requiredField =
	TestRequired.Descriptor.FindDescriptor<FieldDescriptor>("a");
	FieldDescriptor optionalField =
	TestAllTypes.Descriptor.FindDescriptor<FieldDescriptor>("optional_int32");
	FieldDescriptor repeatedField =
	TestAllTypes.Descriptor.FindDescriptor<FieldDescriptor>("repeated_int32");

	Assert.True(requiredField.IsRequired);
	Assert.False(requiredField.IsRepeated);
	Assert.False(optionalField.IsRequired);
	Assert.False(optionalField.IsRepeated);
	Assert.False(repeatedField.IsRequired);
	Assert.True(repeatedField.IsRepeated);
	}
	[Fact]
	public void FieldDescriptorDefault()
	{
	MessageDescriptor d = TestAllTypes.Descriptor;
	Assert.False(d.FindDescriptor<FieldDescriptor>("optional_int32").HasDefaultValue);
	Assert.Equal<object>(0, d.FindDescriptor<FieldDescriptor>("optional_int32").DefaultValue);
	Assert.True(d.FindDescriptor<FieldDescriptor>("default_int32").HasDefaultValue);
	Assert.Equal<object>(41, d.FindDescriptor<FieldDescriptor>("default_int32").DefaultValue);

	d = TestExtremeDefaultValues.Descriptor;
	Assert.Equal<object>(TestExtremeDefaultValues.DefaultInstance.EscapedBytes,
	d.FindDescriptor<FieldDescriptor>("escaped_bytes").DefaultValue);

	Assert.Equal<object>(uint.MaxValue, d.FindDescriptor<FieldDescriptor>("large_uint32").DefaultValue);
	Assert.Equal<object>(ulong.MaxValue, d.FindDescriptor<FieldDescriptor>("large_uint64").DefaultValue);
	}
	[Fact]
	public void EnumDescriptor()
	{
	// Note: this test is a bit different to the Java version because there's no static way of getting to the descriptor
	EnumDescriptor enumType = Unittest.Descriptor.FindTypeByName<EnumDescriptor>("ForeignEnum");
	EnumDescriptor nestedType = TestAllTypes.Descriptor.FindDescriptor<EnumDescriptor>("NestedEnum");

	Assert.Equal("ForeignEnum", enumType.Name);
	Assert.Equal("protobuf_unittest.ForeignEnum", enumType.FullName);
	Assert.Equal(Unittest.Descriptor, enumType.File);
	Assert.Null(enumType.ContainingType);
	Assert.Equal(DescriptorProtos.EnumOptions.DefaultInstance,
	enumType.Options);

	Assert.Equal("NestedEnum", nestedType.Name);
	Assert.Equal("protobuf_unittest.TestAllTypes.NestedEnum",
	nestedType.FullName);
	Assert.Equal(Unittest.Descriptor, nestedType.File);
	Assert.Equal(TestAllTypes.Descriptor, nestedType.ContainingType);

	EnumValueDescriptor value = enumType.FindValueByName("FOREIGN_FOO");
	Assert.Equal(value, enumType.Values[0]);
	Assert.Equal("FOREIGN_FOO", value.Name);
	Assert.Equal(4, value.Number);
	Assert.Equal((int) ForeignEnum.FOREIGN_FOO, value.Number);
	Assert.Equal(value, enumType.FindValueByNumber(4));
	Assert.Null(enumType.FindValueByName("NO_SUCH_VALUE"));
	for (int i = 0; i < enumType.Values.Count; i++)
	{
	Assert.Equal(i, enumType.Values[i].Index);
	}
	}


	[Fact]
	public void CustomOptions()
	{
	MessageDescriptor descriptor = TestMessageWithCustomOptions.Descriptor;
	Assert.True(descriptor.Options.HasExtension(UnittestCustomOptions.MessageOpt1));
	Assert.Equal(-56, descriptor.Options.GetExtension(UnittestCustomOptions.MessageOpt1));


	FieldDescriptor field = descriptor.FindFieldByName("field1");
	Assert.NotNull(field);

	Assert.True(field.Options.HasExtension(UnittestCustomOptions.FieldOpt1));
	Assert.Equal(8765432109uL, field.Options.GetExtension(UnittestCustomOptions.FieldOpt1));

	}
	}
	}