context: #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 System;
  using System.Collections.Generic;
  using System.Text;
  using Google.ProtocolBuffers;
  using Google.ProtocolBuffers.TestProtos;
  using NUnit.Framework;
  
  namespace Google.ProtocolBuffers
  {
      public class ExtendableMessageLiteTest
      {
          //The lite framework does not make this assertion
          //[TestMethod, Ignore, ExpectedException(typeof(ArgumentException))]
          //public void ExtensionWriterInvalidExtension()
          //{
          //    TestPackedExtensionsLite.CreateBuilder()[
          //        UnittestLite.OptionalForeignMessageExtensionLite.DescriptorProtoFile] =
          //        ForeignMessageLite.DefaultInstance;
          //}
  
          [Test]
          public void ExtensionWriterTestMessages()
          {
              TestAllExtensionsLite.Builder b = TestAllExtensionsLite.CreateBuilder().SetExtension(
                  UnittestLite.OptionalForeignMessageExtensionLite,
                  ForeignMessageLite.CreateBuilder().SetC(123).Build());
              TestAllExtensionsLite copy, msg = b.Build();
  
              ExtensionRegistry registry = ExtensionRegistry.CreateInstance();
              UnittestLite.RegisterAllExtensions(registry);
  
              copy = TestAllExtensionsLite.ParseFrom(msg.ToByteArray(), registry);
              Assert.AreEqual(msg.ToByteArray(), copy.ToByteArray());
          }
  
          [Test]
          public void ExtensionWriterIsInitialized()
          {
              Assert.IsTrue(ForeignMessageLite.DefaultInstance.IsInitialized);
              Assert.IsTrue(TestPackedExtensionsLite.CreateBuilder().IsInitialized);
              Assert.IsTrue(TestAllExtensionsLite.CreateBuilder().SetExtension(
                  UnittestLite.OptionalForeignMessageExtensionLite, ForeignMessageLite.DefaultInstance)
                                .IsInitialized);
          }
  
          [Test]
          public void ExtensionWriterTestSetExtensionLists()
          {
              TestAllExtensionsLite msg, copy;
              TestAllExtensionsLite.Builder builder = TestAllExtensionsLite.CreateBuilder()
                  .SetExtension(UnittestLite.RepeatedBoolExtensionLite, new[] {true, false})
                  .SetExtension(UnittestLite.RepeatedCordExtensionLite, new[] {"123", "456"})
                  .SetExtension(UnittestLite.RepeatedForeignEnumExtensionLite,
                                new[] {ForeignEnumLite.FOREIGN_LITE_BAZ, ForeignEnumLite.FOREIGN_LITE_FOO})
                  ;
  
              msg = builder.Build();
              ExtensionRegistry registry = ExtensionRegistry.CreateInstance();
              UnittestLite.RegisterAllExtensions(registry);
  
              copy = TestAllExtensionsLite.ParseFrom(msg.ToByteArray(), registry);
              Assert.AreEqual(msg.ToByteArray(), copy.ToByteArray());
  
              Assert.AreEqual(ForeignEnumLite.FOREIGN_LITE_FOO,
                              copy.GetExtension(UnittestLite.RepeatedForeignEnumExtensionLite, 1));
          }
  
          [Test]
          public void ExtensionWriterTest()
          {
              TestAllExtensionsLite.Builder builder = TestAllExtensionsLite.CreateBuilder()
                  .SetExtension(UnittestLite.DefaultBoolExtensionLite, true)
                  .SetExtension(UnittestLite.DefaultBytesExtensionLite, ByteString.CopyFromUtf8("123"))
                  .SetExtension(UnittestLite.DefaultCordExtensionLite, "123")
                  .SetExtension(UnittestLite.DefaultDoubleExtensionLite, 123)
                  .SetExtension(UnittestLite.DefaultFixed32ExtensionLite, 123u)
                  .SetExtension(UnittestLite.DefaultFixed64ExtensionLite, 123u)
                  .SetExtension(UnittestLite.DefaultFloatExtensionLite, 123)
                  .SetExtension(UnittestLite.DefaultForeignEnumExtensionLite, ForeignEnumLite.FOREIGN_LITE_BAZ)
                  .SetExtension(UnittestLite.DefaultImportEnumExtensionLite, ImportEnumLite.IMPORT_LITE_BAZ)
                  .SetExtension(UnittestLite.DefaultInt32ExtensionLite, 123)
                  .SetExtension(UnittestLite.DefaultInt64ExtensionLite, 123)
                  .SetExtension(UnittestLite.DefaultNestedEnumExtensionLite,
                                TestAllTypesLite.Types.NestedEnum.FOO)
                  .SetExtension(UnittestLite.DefaultSfixed32ExtensionLite, 123)
                  .SetExtension(UnittestLite.DefaultSfixed64ExtensionLite, 123)
                  .SetExtension(UnittestLite.DefaultSint32ExtensionLite, 123)
                  .SetExtension(UnittestLite.DefaultSint64ExtensionLite, 123)
                  .SetExtension(UnittestLite.DefaultStringExtensionLite, "123")
                  .SetExtension(UnittestLite.DefaultStringPieceExtensionLite, "123")
                  .SetExtension(UnittestLite.DefaultUint32ExtensionLite, 123u)
                  .SetExtension(UnittestLite.DefaultUint64ExtensionLite, 123u)
                  //Optional
                  .SetExtension(UnittestLite.OptionalBoolExtensionLite, true)
                  .SetExtension(UnittestLite.OptionalBytesExtensionLite, ByteString.CopyFromUtf8("123"))
                  .SetExtension(UnittestLite.OptionalCordExtensionLite, "123")
                  .SetExtension(UnittestLite.OptionalDoubleExtensionLite, 123)
                  .SetExtension(UnittestLite.OptionalFixed32ExtensionLite, 123u)
                  .SetExtension(UnittestLite.OptionalFixed64ExtensionLite, 123u)
                  .SetExtension(UnittestLite.OptionalFloatExtensionLite, 123)
                  .SetExtension(UnittestLite.OptionalForeignEnumExtensionLite, ForeignEnumLite.FOREIGN_LITE_BAZ)
                  .SetExtension(UnittestLite.OptionalImportEnumExtensionLite, ImportEnumLite.IMPORT_LITE_BAZ)
                  .SetExtension(UnittestLite.OptionalInt32ExtensionLite, 123)
                  .SetExtension(UnittestLite.OptionalInt64ExtensionLite, 123)
                  .SetExtension(UnittestLite.OptionalNestedEnumExtensionLite,
                                TestAllTypesLite.Types.NestedEnum.FOO)
                  .SetExtension(UnittestLite.OptionalSfixed32ExtensionLite, 123)
                  .SetExtension(UnittestLite.OptionalSfixed64ExtensionLite, 123)
                  .SetExtension(UnittestLite.OptionalSint32ExtensionLite, 123)
                  .SetExtension(UnittestLite.OptionalSint64ExtensionLite, 123)
                  .SetExtension(UnittestLite.OptionalStringExtensionLite, "123")
                  .SetExtension(UnittestLite.OptionalStringPieceExtensionLite, "123")
                  .SetExtension(UnittestLite.OptionalUint32ExtensionLite, 123u)
                  .SetExtension(UnittestLite.OptionalUint64ExtensionLite, 123u)
                  //Repeated
                  .AddExtension(UnittestLite.RepeatedBoolExtensionLite, true)
                  .AddExtension(UnittestLite.RepeatedBytesExtensionLite, ByteString.CopyFromUtf8("123"))
                  .AddExtension(UnittestLite.RepeatedCordExtensionLite, "123")
                  .AddExtension(UnittestLite.RepeatedDoubleExtensionLite, 123)
                  .AddExtension(UnittestLite.RepeatedFixed32ExtensionLite, 123u)
                  .AddExtension(UnittestLite.RepeatedFixed64ExtensionLite, 123u)
                  .AddExtension(UnittestLite.RepeatedFloatExtensionLite, 123)
                  .AddExtension(UnittestLite.RepeatedForeignEnumExtensionLite, ForeignEnumLite.FOREIGN_LITE_BAZ)
                  .AddExtension(UnittestLite.RepeatedImportEnumExtensionLite, ImportEnumLite.IMPORT_LITE_BAZ)
                  .AddExtension(UnittestLite.RepeatedInt32ExtensionLite, 123)
                  .AddExtension(UnittestLite.RepeatedInt64ExtensionLite, 123)
                  .AddExtension(UnittestLite.RepeatedNestedEnumExtensionLite,
                                TestAllTypesLite.Types.NestedEnum.FOO)
                  .AddExtension(UnittestLite.RepeatedSfixed32ExtensionLite, 123)
                  .AddExtension(UnittestLite.RepeatedSfixed64ExtensionLite, 123)
                  .AddExtension(UnittestLite.RepeatedSint32ExtensionLite, 123)
                  .AddExtension(UnittestLite.RepeatedSint64ExtensionLite, 123)
                  .AddExtension(UnittestLite.RepeatedStringExtensionLite, "123")
                  .AddExtension(UnittestLite.RepeatedStringPieceExtensionLite, "123")
                  .AddExtension(UnittestLite.RepeatedUint32ExtensionLite, 123u)
                  .AddExtension(UnittestLite.RepeatedUint64ExtensionLite, 123u)
                  ;
              TestAllExtensionsLite msg = builder.Build();
  
              ExtensionRegistry registry = ExtensionRegistry.CreateInstance();
              UnittestLite.RegisterAllExtensions(registry);
  
              TestAllExtensionsLite.Builder copyBuilder =
                  TestAllExtensionsLite.CreateBuilder().MergeFrom(msg.ToByteArray(), registry);
              TestAllExtensionsLite copy = copyBuilder.Build();
  
              Assert.AreEqual(msg.ToByteArray(), copy.ToByteArray());
  
              Assert.AreEqual(true, copy.GetExtension(UnittestLite.DefaultBoolExtensionLite));
              Assert.AreEqual(ByteString.CopyFromUtf8("123"),
                              copy.GetExtension(UnittestLite.DefaultBytesExtensionLite));
              Assert.AreEqual("123", copy.GetExtension(UnittestLite.DefaultCordExtensionLite));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.DefaultDoubleExtensionLite));
              Assert.AreEqual(123u, copy.GetExtension(UnittestLite.DefaultFixed32ExtensionLite));
              Assert.AreEqual(123u, copy.GetExtension(UnittestLite.DefaultFixed64ExtensionLite));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.DefaultFloatExtensionLite));
              Assert.AreEqual(ForeignEnumLite.FOREIGN_LITE_BAZ,
                              copy.GetExtension(UnittestLite.DefaultForeignEnumExtensionLite));
              Assert.AreEqual(ImportEnumLite.IMPORT_LITE_BAZ,
                              copy.GetExtension(UnittestLite.DefaultImportEnumExtensionLite));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.DefaultInt32ExtensionLite));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.DefaultInt64ExtensionLite));
              Assert.AreEqual(TestAllTypesLite.Types.NestedEnum.FOO,
                              copy.GetExtension(UnittestLite.DefaultNestedEnumExtensionLite));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.DefaultSfixed32ExtensionLite));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.DefaultSfixed64ExtensionLite));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.DefaultSint32ExtensionLite));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.DefaultSint64ExtensionLite));
              Assert.AreEqual("123", copy.GetExtension(UnittestLite.DefaultStringExtensionLite));
              Assert.AreEqual("123", copy.GetExtension(UnittestLite.DefaultStringPieceExtensionLite));
              Assert.AreEqual(123u, copy.GetExtension(UnittestLite.DefaultUint32ExtensionLite));
              Assert.AreEqual(123u, copy.GetExtension(UnittestLite.DefaultUint64ExtensionLite));
  
              Assert.AreEqual(true, copy.GetExtension(UnittestLite.OptionalBoolExtensionLite));
              Assert.AreEqual(ByteString.CopyFromUtf8("123"),
                              copy.GetExtension(UnittestLite.OptionalBytesExtensionLite));
              Assert.AreEqual("123", copy.GetExtension(UnittestLite.OptionalCordExtensionLite));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.OptionalDoubleExtensionLite));
              Assert.AreEqual(123u, copy.GetExtension(UnittestLite.OptionalFixed32ExtensionLite));
              Assert.AreEqual(123u, copy.GetExtension(UnittestLite.OptionalFixed64ExtensionLite));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.OptionalFloatExtensionLite));
              Assert.AreEqual(ForeignEnumLite.FOREIGN_LITE_BAZ,
                              copy.GetExtension(UnittestLite.OptionalForeignEnumExtensionLite));
              Assert.AreEqual(ImportEnumLite.IMPORT_LITE_BAZ,
                              copy.GetExtension(UnittestLite.OptionalImportEnumExtensionLite));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.OptionalInt32ExtensionLite));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.OptionalInt64ExtensionLite));
              Assert.AreEqual(TestAllTypesLite.Types.NestedEnum.FOO,
                              copy.GetExtension(UnittestLite.OptionalNestedEnumExtensionLite));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.OptionalSfixed32ExtensionLite));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.OptionalSfixed64ExtensionLite));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.OptionalSint32ExtensionLite));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.OptionalSint64ExtensionLite));
              Assert.AreEqual("123", copy.GetExtension(UnittestLite.OptionalStringExtensionLite));
              Assert.AreEqual("123", copy.GetExtension(UnittestLite.OptionalStringPieceExtensionLite));
              Assert.AreEqual(123u, copy.GetExtension(UnittestLite.OptionalUint32ExtensionLite));
              Assert.AreEqual(123u, copy.GetExtension(UnittestLite.OptionalUint64ExtensionLite));
  
              Assert.AreEqual(true, copy.GetExtension(UnittestLite.RepeatedBoolExtensionLite, 0));
              Assert.AreEqual(ByteString.CopyFromUtf8("123"),
                              copy.GetExtension(UnittestLite.RepeatedBytesExtensionLite, 0));
              Assert.AreEqual("123", copy.GetExtension(UnittestLite.RepeatedCordExtensionLite, 0));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.RepeatedDoubleExtensionLite, 0));
              Assert.AreEqual(123u, copy.GetExtension(UnittestLite.RepeatedFixed32ExtensionLite, 0));
              Assert.AreEqual(123u, copy.GetExtension(UnittestLite.RepeatedFixed64ExtensionLite, 0));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.RepeatedFloatExtensionLite, 0));
              Assert.AreEqual(ForeignEnumLite.FOREIGN_LITE_BAZ,
                              copy.GetExtension(UnittestLite.RepeatedForeignEnumExtensionLite, 0));
              Assert.AreEqual(ImportEnumLite.IMPORT_LITE_BAZ,
                              copy.GetExtension(UnittestLite.RepeatedImportEnumExtensionLite, 0));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.RepeatedInt32ExtensionLite, 0));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.RepeatedInt64ExtensionLite, 0));
              Assert.AreEqual(TestAllTypesLite.Types.NestedEnum.FOO,
                              copy.GetExtension(UnittestLite.RepeatedNestedEnumExtensionLite, 0));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.RepeatedSfixed32ExtensionLite, 0));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.RepeatedSfixed64ExtensionLite, 0));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.RepeatedSint32ExtensionLite, 0));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.RepeatedSint64ExtensionLite, 0));
              Assert.AreEqual("123", copy.GetExtension(UnittestLite.RepeatedStringExtensionLite, 0));
              Assert.AreEqual("123", copy.GetExtension(UnittestLite.RepeatedStringPieceExtensionLite, 0));
              Assert.AreEqual(123u, copy.GetExtension(UnittestLite.RepeatedUint32ExtensionLite, 0));
              Assert.AreEqual(123u, copy.GetExtension(UnittestLite.RepeatedUint64ExtensionLite, 0));
          }
  
          private TestPackedExtensionsLite BuildPackedExtensions()
          {
              TestPackedExtensionsLite.Builder builder = TestPackedExtensionsLite.CreateBuilder()
                     .AddExtension(UnittestLite.PackedBoolExtensionLite, true)
                     .AddExtension(UnittestLite.PackedDoubleExtensionLite, 123)
                     .AddExtension(UnittestLite.PackedFixed32ExtensionLite, 123u)
                     .AddExtension(UnittestLite.PackedFixed64ExtensionLite, 123u)
                     .AddExtension(UnittestLite.PackedFloatExtensionLite, 123)
                     .AddExtension(UnittestLite.PackedInt32ExtensionLite, 123)
                     .AddExtension(UnittestLite.PackedInt64ExtensionLite, 123)
                     .AddExtension(UnittestLite.PackedSfixed32ExtensionLite, 123)
                     .AddExtension(UnittestLite.PackedSfixed64ExtensionLite, 123)
                     .AddExtension(UnittestLite.PackedSint32ExtensionLite, 123)
                     .AddExtension(UnittestLite.PackedSint64ExtensionLite, 123)
                     .AddExtension(UnittestLite.PackedUint32ExtensionLite, 123u)
                     .AddExtension(UnittestLite.PackedUint64ExtensionLite, 123u)
                     .AddExtension(UnittestLite.PackedBoolExtensionLite, true)
                     .AddExtension(UnittestLite.PackedDoubleExtensionLite, 123)
                     .AddExtension(UnittestLite.PackedFixed32ExtensionLite, 123u)
                     .AddExtension(UnittestLite.PackedFixed64ExtensionLite, 123u)
                     .AddExtension(UnittestLite.PackedFloatExtensionLite, 123)
                     .AddExtension(UnittestLite.PackedInt32ExtensionLite, 123)
                     .AddExtension(UnittestLite.PackedInt64ExtensionLite, 123)
                     .AddExtension(UnittestLite.PackedSfixed32ExtensionLite, 123)
                     .AddExtension(UnittestLite.PackedSfixed64ExtensionLite, 123)
                     .AddExtension(UnittestLite.PackedSint32ExtensionLite, 123)
                     .AddExtension(UnittestLite.PackedSint64ExtensionLite, 123)
                     .AddExtension(UnittestLite.PackedUint32ExtensionLite, 123u)
                     .AddExtension(UnittestLite.PackedUint64ExtensionLite, 123u);
  
              TestPackedExtensionsLite msg = builder.Build();
              return msg;
          }
  
          private void AssertPackedExtensions(TestPackedExtensionsLite copy)
          {
              Assert.AreEqual(true, copy.GetExtension(UnittestLite.PackedBoolExtensionLite, 0));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.PackedDoubleExtensionLite, 0));
              Assert.AreEqual(123u, copy.GetExtension(UnittestLite.PackedFixed32ExtensionLite, 0));
              Assert.AreEqual(123u, copy.GetExtension(UnittestLite.PackedFixed64ExtensionLite, 0));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.PackedFloatExtensionLite, 0));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.PackedInt32ExtensionLite, 0));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.PackedInt64ExtensionLite, 0));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.PackedSfixed32ExtensionLite, 0));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.PackedSfixed64ExtensionLite, 0));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.PackedSint32ExtensionLite, 0));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.PackedSint64ExtensionLite, 0));
              Assert.AreEqual(123u, copy.GetExtension(UnittestLite.PackedUint32ExtensionLite, 0));
              Assert.AreEqual(123u, copy.GetExtension(UnittestLite.PackedUint64ExtensionLite, 0));
  
              Assert.AreEqual(true, copy.GetExtension(UnittestLite.PackedBoolExtensionLite, 1));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.PackedDoubleExtensionLite, 1));
              Assert.AreEqual(123u, copy.GetExtension(UnittestLite.PackedFixed32ExtensionLite, 1));
              Assert.AreEqual(123u, copy.GetExtension(UnittestLite.PackedFixed64ExtensionLite, 1));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.PackedFloatExtensionLite, 1));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.PackedInt32ExtensionLite, 1));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.PackedInt64ExtensionLite, 1));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.PackedSfixed32ExtensionLite, 1));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.PackedSfixed64ExtensionLite, 1));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.PackedSint32ExtensionLite, 1));
              Assert.AreEqual(123, copy.GetExtension(UnittestLite.PackedSint64ExtensionLite, 1));
              Assert.AreEqual(123u, copy.GetExtension(UnittestLite.PackedUint32ExtensionLite, 1));
              Assert.AreEqual(123u, copy.GetExtension(UnittestLite.PackedUint64ExtensionLite, 1));
          }
  
          [Test]
          public void ExtensionWriterTestPacked()
          {
              TestPackedExtensionsLite msg = BuildPackedExtensions();
  
              ExtensionRegistry registry = ExtensionRegistry.CreateInstance();
              UnittestLite.RegisterAllExtensions(registry);
  
              TestPackedExtensionsLite.Builder copyBuilder =
                  TestPackedExtensionsLite.CreateBuilder().MergeFrom(msg.ToByteArray(), registry);
              TestPackedExtensionsLite copy = copyBuilder.Build();
  
              Assert.AreEqual(msg.ToByteArray(), copy.ToByteArray());
  
              AssertPackedExtensions(copy);
          }
  
          [Test]
          public void TestUnpackedAndPackedExtensions()
          {
              TestPackedExtensionsLite original = BuildPackedExtensions();
              AssertPackedExtensions(original);
  
  
gt:             ExtensionRegistry registry = ExtensionRegistry.CreateInstance();