csharp/src/Google.Protobuf.Test/Reflection/CustomOptionsTest.cs - third_party/protobuf - Git at Google

 #region Copyright notice and license
 // Protocol Buffers - Google's data interchange format
 // Copyright 2017 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
 #endregion

 using Google.Protobuf.Reflection;
 using NUnit.Framework;
 using System;
 using System.Linq;
 using UnitTest.Issues.TestProtos;
 using static UnitTest.Issues.TestProtos.ComplexOptionType2.Types;
 using static UnitTest.Issues.TestProtos.UnittestCustomOptionsProto3Extensions;
 using static UnitTest.Issues.TestProtos.DummyMessageContainingEnum.Types;
 using Google.Protobuf.TestProtos;

 #pragma warning disable CS0618

 namespace Google.Protobuf.Test.Reflection
 {
     /// <summary>
     /// The majority of the testing here is done via parsed descriptors. That's simpler to
     /// achieve (and more important) than constructing a CodedInputStream manually.
     /// </summary>
     public class CustomOptionsTest
     {
         delegate bool OptionFetcher<T>(int field, out T value);

         OptionFetcher<E> EnumFetcher<E>(CustomOptions options)
         {
             return (int i, out E v) => {
                 if (options.TryGetInt32(i, out int value))
                 {
                     v = (E)(object)value;
                     return true;
                 }
                 else
                 {
                     v = default;
                     return false;
                 }
             };
         }

         [Test]
         public void BuiltinOptionsCanBeRetrieved()
         {
             // non-custom options (that are not extensions but regular fields) can only be accessed via descriptor.Options
             var fileOptions = UnittestProto3Reflection.Descriptor.GetOptions();
             Assert.AreEqual("Google.Protobuf.TestProtos", fileOptions.CsharpNamespace);
         }

         [Test]
         public void OptionPresenceCanBeDetected()
         {
             // case 1: the descriptor has no options at all so the options message is not present
             Assert.IsNull(TestAllTypes.Descriptor.GetOptions());

             // case 2: the descriptor has some options, but not the one we're looking for
             // HasExtension will be false and GetExtension returns extension's default value
             Assert.IsFalse(UnittestProto3Reflection.Descriptor.GetOptions().HasExtension(FileOpt1));
             Assert.AreEqual(0, UnittestProto3Reflection.Descriptor.GetOptions().GetExtension(FileOpt1));

             // case 3: option is present
             Assert.IsTrue(UnittestCustomOptionsProto3Reflection.Descriptor.GetOptions().HasExtension(FileOpt1));
             Assert.AreEqual(9876543210UL, UnittestCustomOptionsProto3Reflection.Descriptor.GetOptions().GetExtension(FileOpt1));
         }

         [Test]
         public void ScalarOptions()
         {
             var d = CustomOptionOtherValues.Descriptor;
             var customOptions = d.CustomOptions;
             AssertOption(-100, customOptions.TryGetInt32, Int32Opt, d.GetOption, d.GetOptions().GetExtension);
             AssertOption(12.3456789f, customOptions.TryGetFloat, FloatOpt, d.GetOption, d.GetOptions().GetExtension);
             AssertOption(1.234567890123456789d, customOptions.TryGetDouble, DoubleOpt, d.GetOption, d.GetOptions().GetExtension);
             AssertOption("Hello, \"World\"", customOptions.TryGetString, StringOpt, d.GetOption, d.GetOptions().GetExtension);
             AssertOption(ByteString.CopyFromUtf8("Hello\0World"), customOptions.TryGetBytes, BytesOpt, d.GetOption, d.GetOptions().GetExtension);
             AssertOption(TestEnumType.TestOptionEnumType2, EnumFetcher<TestEnumType>(customOptions), EnumOpt, d.GetOption, d.GetOptions().GetExtension);
         }

         [Test]
         public void MessageOptions()
         {
             var d = VariousComplexOptions.Descriptor;
             var customOptions = d.CustomOptions;
             AssertOption(new ComplexOptionType1 { Foo = 42, Foo4 = { 99, 88 } }, customOptions.TryGetMessage, ComplexOpt1, d.GetOption, d.GetOptions().GetExtension);
             AssertOption(new ComplexOptionType2
             {
                 Baz = 987,
                 Bar = new ComplexOptionType1 { Foo = 743 },
                 Fred = new ComplexOptionType4 { Waldo = 321 },
                 Barney = { new ComplexOptionType4 { Waldo = 101 }, new ComplexOptionType4 { Waldo = 212 } }
             },
                 customOptions.TryGetMessage, ComplexOpt2, d.GetOption, d.GetOptions().GetExtension);
             AssertOption(new ComplexOptionType3 { Qux = 9 }, customOptions.TryGetMessage, ComplexOpt3, d.GetOption, d.GetOptions().GetExtension);
         }

         [Test]
         public void OptionLocations()
         {
             var fileDescriptor = UnittestCustomOptionsProto3Reflection.Descriptor;
             AssertOption(9876543210UL, fileDescriptor.CustomOptions.TryGetUInt64, FileOpt1, fileDescriptor.GetOption, fileDescriptor.GetOptions().GetExtension);

             var messageDescriptor = TestMessageWithCustomOptions.Descriptor;
             AssertOption(-56, messageDescriptor.CustomOptions.TryGetInt32, MessageOpt1, messageDescriptor.GetOption, messageDescriptor.GetOptions().GetExtension);

             var fieldDescriptor = TestMessageWithCustomOptions.Descriptor.Fields["field1"];
             AssertOption(8765432109UL, fieldDescriptor.CustomOptions.TryGetFixed64, FieldOpt1, fieldDescriptor.GetOption, fieldDescriptor.GetOptions().GetExtension);

             var oneofDescriptor = TestMessageWithCustomOptions.Descriptor.Oneofs[0];
             AssertOption(-99, oneofDescriptor.CustomOptions.TryGetInt32, OneofOpt1, oneofDescriptor.GetOption, oneofDescriptor.GetOptions().GetExtension);

             var enumDescriptor = TestMessageWithCustomOptions.Descriptor.EnumTypes[0];
             AssertOption(-789, enumDescriptor.CustomOptions.TryGetSFixed32, EnumOpt1, enumDescriptor.GetOption, enumDescriptor.GetOptions().GetExtension);

             var enumValueDescriptor = TestMessageWithCustomOptions.Descriptor.EnumTypes[0].FindValueByNumber(2);
             AssertOption(123, enumValueDescriptor.CustomOptions.TryGetInt32, EnumValueOpt1, enumValueDescriptor.GetOption, enumValueDescriptor.GetOptions().GetExtension);

             var serviceDescriptor = UnittestCustomOptionsProto3Reflection.Descriptor.Services
                 .Single(s => s.Name == "TestServiceWithCustomOptions");
             AssertOption(-9876543210, serviceDescriptor.CustomOptions.TryGetSInt64, ServiceOpt1, serviceDescriptor.GetOption, serviceDescriptor.GetOptions().GetExtension);

             var methodDescriptor = serviceDescriptor.Methods[0];
             AssertOption(UnitTest.Issues.TestProtos.MethodOpt1.Val2, EnumFetcher<UnitTest.Issues.TestProtos.MethodOpt1>(methodDescriptor.CustomOptions), UnittestCustomOptionsProto3Extensions.MethodOpt1, methodDescriptor.GetOption, methodDescriptor.GetOptions().GetExtension);
         }

         [Test]
         public void MinValues()
         {
             var d = CustomOptionMinIntegerValues.Descriptor;
             var customOptions = d.CustomOptions;
             AssertOption(false, customOptions.TryGetBool, BoolOpt, d.GetOption, d.GetOptions().GetExtension);
             AssertOption(int.MinValue, customOptions.TryGetInt32, Int32Opt, d.GetOption, d.GetOptions().GetExtension);
             AssertOption(long.MinValue, customOptions.TryGetInt64, Int64Opt, d.GetOption, d.GetOptions().GetExtension);
             AssertOption(uint.MinValue, customOptions.TryGetUInt32, Uint32Opt, d.GetOption, d.GetOptions().GetExtension);
             AssertOption(ulong.MinValue, customOptions.TryGetUInt64, Uint64Opt, d.GetOption, d.GetOptions().GetExtension);
             AssertOption(int.MinValue, customOptions.TryGetSInt32, Sint32Opt, d.GetOption, d.GetOptions().GetExtension);
             AssertOption(long.MinValue, customOptions.TryGetSInt64, Sint64Opt, d.GetOption, d.GetOptions().GetExtension);
             AssertOption(uint.MinValue, customOptions.TryGetUInt32, Fixed32Opt, d.GetOption, d.GetOptions().GetExtension);
             AssertOption(ulong.MinValue, customOptions.TryGetUInt64, Fixed64Opt, d.GetOption, d.GetOptions().GetExtension);
             AssertOption(int.MinValue, customOptions.TryGetInt32, Sfixed32Opt, d.GetOption, d.GetOptions().GetExtension);
             AssertOption(long.MinValue, customOptions.TryGetInt64, Sfixed64Opt, d.GetOption, d.GetOptions().GetExtension);
         }

         [Test]
         public void MaxValues()
         {
             var d = CustomOptionMaxIntegerValues.Descriptor;
             var customOptions = d.CustomOptions;
             AssertOption(true, customOptions.TryGetBool, BoolOpt, d.GetOption, d.GetOptions().GetExtension);
             AssertOption(int.MaxValue, customOptions.TryGetInt32, Int32Opt, d.GetOption, d.GetOptions().GetExtension);
             AssertOption(long.MaxValue, customOptions.TryGetInt64, Int64Opt, d.GetOption, d.GetOptions().GetExtension);
             AssertOption(uint.MaxValue, customOptions.TryGetUInt32, Uint32Opt, d.GetOption, d.GetOptions().GetExtension);
             AssertOption(ulong.MaxValue, customOptions.TryGetUInt64, Uint64Opt, d.GetOption, d.GetOptions().GetExtension);
             AssertOption(int.MaxValue, customOptions.TryGetSInt32, Sint32Opt, d.GetOption, d.GetOptions().GetExtension);
             AssertOption(long.MaxValue, customOptions.TryGetSInt64, Sint64Opt, d.GetOption, d.GetOptions().GetExtension);
             AssertOption(uint.MaxValue, customOptions.TryGetFixed32, Fixed32Opt, d.GetOption, d.GetOptions().GetExtension);
             AssertOption(ulong.MaxValue, customOptions.TryGetFixed64, Fixed64Opt, d.GetOption, d.GetOptions().GetExtension);
             AssertOption(int.MaxValue, customOptions.TryGetSFixed32, Sfixed32Opt, d.GetOption, d.GetOptions().GetExtension);
             AssertOption(long.MaxValue, customOptions.TryGetSFixed64, Sfixed64Opt, d.GetOption, d.GetOptions().GetExtension);
         }

         [Test]
         public void AggregateOptions()
         {
             // Just two examples
             var messageDescriptor = AggregateMessage.Descriptor;
             AssertOption(new Aggregate { I = 101, S = "MessageAnnotation" }, messageDescriptor.CustomOptions.TryGetMessage, Msgopt, messageDescriptor.GetOption, messageDescriptor.GetOptions().GetExtension);

             var fieldDescriptor = messageDescriptor.Fields["fieldname"];
             AssertOption(new Aggregate { S = "FieldAnnotation" }, fieldDescriptor.CustomOptions.TryGetMessage, Fieldopt, fieldDescriptor.GetOption, fieldDescriptor.GetOptions().GetExtension);
         }

         [Test]
         public void NoOptions()
         {
             var fileDescriptor = UnittestProto3Reflection.Descriptor;
             var messageDescriptor = TestAllTypes.Descriptor;
             Assert.NotNull(fileDescriptor.CustomOptions);
             Assert.NotNull(messageDescriptor.CustomOptions);
             Assert.NotNull(messageDescriptor.Fields[1].CustomOptions);
             Assert.NotNull(fileDescriptor.Services[0].CustomOptions);
             Assert.NotNull(fileDescriptor.Services[0].Methods[0].CustomOptions);
             Assert.NotNull(fileDescriptor.EnumTypes[0].CustomOptions);
             Assert.NotNull(fileDescriptor.EnumTypes[0].Values[0].CustomOptions);
             Assert.NotNull(TestAllTypes.Descriptor.Oneofs[0].CustomOptions);
         }

         [Test]
         public void MultipleImportOfSameFileWithExtension()
         {
             var descriptor = UnittestIssue6936CReflection.Descriptor;
             var foo = Foo.Descriptor;
             var bar = Bar.Descriptor;
             AssertOption("foo", foo.CustomOptions.TryGetString, UnittestIssue6936AExtensions.Opt, foo.GetOption, foo.GetOptions().GetExtension);
             AssertOption("bar", bar.CustomOptions.TryGetString, UnittestIssue6936AExtensions.Opt, bar.GetOption, bar.GetOptions().GetExtension);
         }

         [Test]
         public void SelfReferentialOptions()
         {
             // Custom field option used in definition of the custom option's message.
             var fooField = UnitTest.Issues.TestProtos.SelfreferentialOptions.FooOptions.Descriptor.FindFieldByName("foo");
             var fooFieldFooExtensionValue = fooField.GetOptions().GetExtension(UnitTest.Issues.TestProtos.SelfreferentialOptions.UnittestSelfreferentialOptionsExtensions.FooOptions);
             Assert.AreEqual(1234, fooFieldFooExtensionValue.Foo);

             // Custom field option used on the definition of that field option.
             var fileDescriptor = UnitTest.Issues.TestProtos.SelfreferentialOptions.UnittestSelfreferentialOptionsReflection.Descriptor;
             var barOptionsField = fileDescriptor.Extensions.UnorderedExtensions.Single(field => field.Name == "bar_options");
             var barExtensionValue = barOptionsField.GetOptions().GetExtension(UnitTest.Issues.TestProtos.SelfreferentialOptions.UnittestSelfreferentialOptionsExtensions.BarOptions);
             Assert.AreEqual(1234, barExtensionValue);

             // Custom field option used in definition of the extension message.
             var intOptField = UnitTest.Issues.TestProtos.SelfreferentialOptions.FooOptions.Descriptor.FindFieldByName("int_opt");
             var intOptFieldFooExtensionValue = intOptField.GetOptions().GetExtension(UnitTest.Issues.TestProtos.SelfreferentialOptions.UnittestSelfreferentialOptionsExtensions.FooOptions);
             Assert.AreEqual(1, intOptFieldFooExtensionValue.IntOpt);
             Assert.AreEqual(2, intOptFieldFooExtensionValue.GetExtension(UnitTest.Issues.TestProtos.SelfreferentialOptions.UnittestSelfreferentialOptionsExtensions.FooIntOpt));
             Assert.AreEqual(3, intOptFieldFooExtensionValue.GetExtension(UnitTest.Issues.TestProtos.SelfreferentialOptions.UnittestSelfreferentialOptionsExtensions.FooFooOpt).IntOpt);
         }

         private void AssertOption<T, D>(T expected, OptionFetcher<T> customOptionFetcher, Extension<D, T> extension, Func<Extension<D, T>, T> getOptionFetcher, Func<Extension<D, T>, T> extensionFetcher) where D : IExtendableMessage<D>
         {
             Assert.IsTrue(customOptionFetcher(extension.FieldNumber, out T customOptionsValue));
             Assert.AreEqual(expected, customOptionsValue);

             T getOptionValue = getOptionFetcher(extension);
             Assert.AreEqual(expected, getOptionValue);

             T extensionValue = extensionFetcher(extension);
             Assert.AreEqual(expected, extensionValue);
         }
     }
 }
	#region Copyright notice and license
	// Protocol Buffers - Google's data interchange format
	// Copyright 2017 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
	#endregion

	using Google.Protobuf.Reflection;
	using NUnit.Framework;
	using System;
	using System.Linq;
	using UnitTest.Issues.TestProtos;
	using static UnitTest.Issues.TestProtos.ComplexOptionType2.Types;
	using static UnitTest.Issues.TestProtos.UnittestCustomOptionsProto3Extensions;
	using static UnitTest.Issues.TestProtos.DummyMessageContainingEnum.Types;
	using Google.Protobuf.TestProtos;

	#pragma warning disable CS0618

	namespace Google.Protobuf.Test.Reflection
	{
	/// <summary>
	/// The majority of the testing here is done via parsed descriptors. That's simpler to
	/// achieve (and more important) than constructing a CodedInputStream manually.
	/// </summary>
	public class CustomOptionsTest
	{
	delegate bool OptionFetcher<T>(int field, out T value);

	OptionFetcher<E> EnumFetcher<E>(CustomOptions options)
	{
	return (int i, out E v) => {
	if (options.TryGetInt32(i, out int value))
	{
	v = (E)(object)value;
	return true;
	}
	else
	{
	v = default;
	return false;
	}
	};
	}

	[Test]
	public void BuiltinOptionsCanBeRetrieved()
	{
	// non-custom options (that are not extensions but regular fields) can only be accessed via descriptor.Options
	var fileOptions = UnittestProto3Reflection.Descriptor.GetOptions();
	Assert.AreEqual("Google.Protobuf.TestProtos", fileOptions.CsharpNamespace);
	}

	[Test]
	public void OptionPresenceCanBeDetected()
	{
	// case 1: the descriptor has no options at all so the options message is not present
	Assert.IsNull(TestAllTypes.Descriptor.GetOptions());

	// case 2: the descriptor has some options, but not the one we're looking for
	// HasExtension will be false and GetExtension returns extension's default value
	Assert.IsFalse(UnittestProto3Reflection.Descriptor.GetOptions().HasExtension(FileOpt1));
	Assert.AreEqual(0, UnittestProto3Reflection.Descriptor.GetOptions().GetExtension(FileOpt1));

	// case 3: option is present
	Assert.IsTrue(UnittestCustomOptionsProto3Reflection.Descriptor.GetOptions().HasExtension(FileOpt1));
	Assert.AreEqual(9876543210UL, UnittestCustomOptionsProto3Reflection.Descriptor.GetOptions().GetExtension(FileOpt1));
	}

	[Test]
	public void ScalarOptions()
	{
	var d = CustomOptionOtherValues.Descriptor;
	var customOptions = d.CustomOptions;
	AssertOption(-100, customOptions.TryGetInt32, Int32Opt, d.GetOption, d.GetOptions().GetExtension);
	AssertOption(12.3456789f, customOptions.TryGetFloat, FloatOpt, d.GetOption, d.GetOptions().GetExtension);
	AssertOption(1.234567890123456789d, customOptions.TryGetDouble, DoubleOpt, d.GetOption, d.GetOptions().GetExtension);
	AssertOption("Hello, \"World\"", customOptions.TryGetString, StringOpt, d.GetOption, d.GetOptions().GetExtension);
	AssertOption(ByteString.CopyFromUtf8("Hello\0World"), customOptions.TryGetBytes, BytesOpt, d.GetOption, d.GetOptions().GetExtension);
	AssertOption(TestEnumType.TestOptionEnumType2, EnumFetcher<TestEnumType>(customOptions), EnumOpt, d.GetOption, d.GetOptions().GetExtension);
	}

	[Test]
	public void MessageOptions()
	{
	var d = VariousComplexOptions.Descriptor;
	var customOptions = d.CustomOptions;
	AssertOption(new ComplexOptionType1 { Foo = 42, Foo4 = { 99, 88 } }, customOptions.TryGetMessage, ComplexOpt1, d.GetOption, d.GetOptions().GetExtension);
	AssertOption(new ComplexOptionType2
	{
	Baz = 987,
	Bar = new ComplexOptionType1 { Foo = 743 },
	Fred = new ComplexOptionType4 { Waldo = 321 },
	Barney = { new ComplexOptionType4 { Waldo = 101 }, new ComplexOptionType4 { Waldo = 212 } }
	},
	customOptions.TryGetMessage, ComplexOpt2, d.GetOption, d.GetOptions().GetExtension);
	AssertOption(new ComplexOptionType3 { Qux = 9 }, customOptions.TryGetMessage, ComplexOpt3, d.GetOption, d.GetOptions().GetExtension);
	}

	[Test]
	public void OptionLocations()
	{
	var fileDescriptor = UnittestCustomOptionsProto3Reflection.Descriptor;
	AssertOption(9876543210UL, fileDescriptor.CustomOptions.TryGetUInt64, FileOpt1, fileDescriptor.GetOption, fileDescriptor.GetOptions().GetExtension);

	var messageDescriptor = TestMessageWithCustomOptions.Descriptor;
	AssertOption(-56, messageDescriptor.CustomOptions.TryGetInt32, MessageOpt1, messageDescriptor.GetOption, messageDescriptor.GetOptions().GetExtension);

	var fieldDescriptor = TestMessageWithCustomOptions.Descriptor.Fields["field1"];
	AssertOption(8765432109UL, fieldDescriptor.CustomOptions.TryGetFixed64, FieldOpt1, fieldDescriptor.GetOption, fieldDescriptor.GetOptions().GetExtension);

	var oneofDescriptor = TestMessageWithCustomOptions.Descriptor.Oneofs[0];
	AssertOption(-99, oneofDescriptor.CustomOptions.TryGetInt32, OneofOpt1, oneofDescriptor.GetOption, oneofDescriptor.GetOptions().GetExtension);

	var enumDescriptor = TestMessageWithCustomOptions.Descriptor.EnumTypes[0];
	AssertOption(-789, enumDescriptor.CustomOptions.TryGetSFixed32, EnumOpt1, enumDescriptor.GetOption, enumDescriptor.GetOptions().GetExtension);

	var enumValueDescriptor = TestMessageWithCustomOptions.Descriptor.EnumTypes[0].FindValueByNumber(2);
	AssertOption(123, enumValueDescriptor.CustomOptions.TryGetInt32, EnumValueOpt1, enumValueDescriptor.GetOption, enumValueDescriptor.GetOptions().GetExtension);

	var serviceDescriptor = UnittestCustomOptionsProto3Reflection.Descriptor.Services
	.Single(s => s.Name == "TestServiceWithCustomOptions");
	AssertOption(-9876543210, serviceDescriptor.CustomOptions.TryGetSInt64, ServiceOpt1, serviceDescriptor.GetOption, serviceDescriptor.GetOptions().GetExtension);

	var methodDescriptor = serviceDescriptor.Methods[0];
	AssertOption(UnitTest.Issues.TestProtos.MethodOpt1.Val2, EnumFetcher<UnitTest.Issues.TestProtos.MethodOpt1>(methodDescriptor.CustomOptions), UnittestCustomOptionsProto3Extensions.MethodOpt1, methodDescriptor.GetOption, methodDescriptor.GetOptions().GetExtension);
	}

	[Test]
	public void MinValues()
	{
	var d = CustomOptionMinIntegerValues.Descriptor;
	var customOptions = d.CustomOptions;
	AssertOption(false, customOptions.TryGetBool, BoolOpt, d.GetOption, d.GetOptions().GetExtension);
	AssertOption(int.MinValue, customOptions.TryGetInt32, Int32Opt, d.GetOption, d.GetOptions().GetExtension);
	AssertOption(long.MinValue, customOptions.TryGetInt64, Int64Opt, d.GetOption, d.GetOptions().GetExtension);
	AssertOption(uint.MinValue, customOptions.TryGetUInt32, Uint32Opt, d.GetOption, d.GetOptions().GetExtension);
	AssertOption(ulong.MinValue, customOptions.TryGetUInt64, Uint64Opt, d.GetOption, d.GetOptions().GetExtension);
	AssertOption(int.MinValue, customOptions.TryGetSInt32, Sint32Opt, d.GetOption, d.GetOptions().GetExtension);
	AssertOption(long.MinValue, customOptions.TryGetSInt64, Sint64Opt, d.GetOption, d.GetOptions().GetExtension);
	AssertOption(uint.MinValue, customOptions.TryGetUInt32, Fixed32Opt, d.GetOption, d.GetOptions().GetExtension);
	AssertOption(ulong.MinValue, customOptions.TryGetUInt64, Fixed64Opt, d.GetOption, d.GetOptions().GetExtension);
	AssertOption(int.MinValue, customOptions.TryGetInt32, Sfixed32Opt, d.GetOption, d.GetOptions().GetExtension);
	AssertOption(long.MinValue, customOptions.TryGetInt64, Sfixed64Opt, d.GetOption, d.GetOptions().GetExtension);
	}

	[Test]
	public void MaxValues()
	{
	var d = CustomOptionMaxIntegerValues.Descriptor;
	var customOptions = d.CustomOptions;
	AssertOption(true, customOptions.TryGetBool, BoolOpt, d.GetOption, d.GetOptions().GetExtension);
	AssertOption(int.MaxValue, customOptions.TryGetInt32, Int32Opt, d.GetOption, d.GetOptions().GetExtension);
	AssertOption(long.MaxValue, customOptions.TryGetInt64, Int64Opt, d.GetOption, d.GetOptions().GetExtension);
	AssertOption(uint.MaxValue, customOptions.TryGetUInt32, Uint32Opt, d.GetOption, d.GetOptions().GetExtension);
	AssertOption(ulong.MaxValue, customOptions.TryGetUInt64, Uint64Opt, d.GetOption, d.GetOptions().GetExtension);
	AssertOption(int.MaxValue, customOptions.TryGetSInt32, Sint32Opt, d.GetOption, d.GetOptions().GetExtension);
	AssertOption(long.MaxValue, customOptions.TryGetSInt64, Sint64Opt, d.GetOption, d.GetOptions().GetExtension);
	AssertOption(uint.MaxValue, customOptions.TryGetFixed32, Fixed32Opt, d.GetOption, d.GetOptions().GetExtension);
	AssertOption(ulong.MaxValue, customOptions.TryGetFixed64, Fixed64Opt, d.GetOption, d.GetOptions().GetExtension);
	AssertOption(int.MaxValue, customOptions.TryGetSFixed32, Sfixed32Opt, d.GetOption, d.GetOptions().GetExtension);
	AssertOption(long.MaxValue, customOptions.TryGetSFixed64, Sfixed64Opt, d.GetOption, d.GetOptions().GetExtension);
	}

	[Test]
	public void AggregateOptions()
	{
	// Just two examples
	var messageDescriptor = AggregateMessage.Descriptor;
	AssertOption(new Aggregate { I = 101, S = "MessageAnnotation" }, messageDescriptor.CustomOptions.TryGetMessage, Msgopt, messageDescriptor.GetOption, messageDescriptor.GetOptions().GetExtension);

	var fieldDescriptor = messageDescriptor.Fields["fieldname"];
	AssertOption(new Aggregate { S = "FieldAnnotation" }, fieldDescriptor.CustomOptions.TryGetMessage, Fieldopt, fieldDescriptor.GetOption, fieldDescriptor.GetOptions().GetExtension);
	}

	[Test]
	public void NoOptions()
	{
	var fileDescriptor = UnittestProto3Reflection.Descriptor;
	var messageDescriptor = TestAllTypes.Descriptor;
	Assert.NotNull(fileDescriptor.CustomOptions);
	Assert.NotNull(messageDescriptor.CustomOptions);
	Assert.NotNull(messageDescriptor.Fields[1].CustomOptions);
	Assert.NotNull(fileDescriptor.Services[0].CustomOptions);
	Assert.NotNull(fileDescriptor.Services[0].Methods[0].CustomOptions);
	Assert.NotNull(fileDescriptor.EnumTypes[0].CustomOptions);
	Assert.NotNull(fileDescriptor.EnumTypes[0].Values[0].CustomOptions);
	Assert.NotNull(TestAllTypes.Descriptor.Oneofs[0].CustomOptions);
	}

	[Test]
	public void MultipleImportOfSameFileWithExtension()
	{
	var descriptor = UnittestIssue6936CReflection.Descriptor;
	var foo = Foo.Descriptor;
	var bar = Bar.Descriptor;
	AssertOption("foo", foo.CustomOptions.TryGetString, UnittestIssue6936AExtensions.Opt, foo.GetOption, foo.GetOptions().GetExtension);
	AssertOption("bar", bar.CustomOptions.TryGetString, UnittestIssue6936AExtensions.Opt, bar.GetOption, bar.GetOptions().GetExtension);
	}

	[Test]
	public void SelfReferentialOptions()
	{
	// Custom field option used in definition of the custom option's message.
	var fooField = UnitTest.Issues.TestProtos.SelfreferentialOptions.FooOptions.Descriptor.FindFieldByName("foo");
	var fooFieldFooExtensionValue = fooField.GetOptions().GetExtension(UnitTest.Issues.TestProtos.SelfreferentialOptions.UnittestSelfreferentialOptionsExtensions.FooOptions);
	Assert.AreEqual(1234, fooFieldFooExtensionValue.Foo);

	// Custom field option used on the definition of that field option.
	var fileDescriptor = UnitTest.Issues.TestProtos.SelfreferentialOptions.UnittestSelfreferentialOptionsReflection.Descriptor;
	var barOptionsField = fileDescriptor.Extensions.UnorderedExtensions.Single(field => field.Name == "bar_options");
	var barExtensionValue = barOptionsField.GetOptions().GetExtension(UnitTest.Issues.TestProtos.SelfreferentialOptions.UnittestSelfreferentialOptionsExtensions.BarOptions);
	Assert.AreEqual(1234, barExtensionValue);

	// Custom field option used in definition of the extension message.
	var intOptField = UnitTest.Issues.TestProtos.SelfreferentialOptions.FooOptions.Descriptor.FindFieldByName("int_opt");
	var intOptFieldFooExtensionValue = intOptField.GetOptions().GetExtension(UnitTest.Issues.TestProtos.SelfreferentialOptions.UnittestSelfreferentialOptionsExtensions.FooOptions);
	Assert.AreEqual(1, intOptFieldFooExtensionValue.IntOpt);
	Assert.AreEqual(2, intOptFieldFooExtensionValue.GetExtension(UnitTest.Issues.TestProtos.SelfreferentialOptions.UnittestSelfreferentialOptionsExtensions.FooIntOpt));
	Assert.AreEqual(3, intOptFieldFooExtensionValue.GetExtension(UnitTest.Issues.TestProtos.SelfreferentialOptions.UnittestSelfreferentialOptionsExtensions.FooFooOpt).IntOpt);
	}

	private void AssertOption<T, D>(T expected, OptionFetcher<T> customOptionFetcher, Extension<D, T> extension, Func<Extension<D, T>, T> getOptionFetcher, Func<Extension<D, T>, T> extensionFetcher) where D : IExtendableMessage<D>
	{
	Assert.IsTrue(customOptionFetcher(extension.FieldNumber, out T customOptionsValue));
	Assert.AreEqual(expected, customOptionsValue);

	T getOptionValue = getOptionFetcher(extension);
	Assert.AreEqual(expected, getOptionValue);

	T extensionValue = extensionFetcher(extension);
	Assert.AreEqual(expected, extensionValue);
	}
	}
	}