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.IO;
  using Google.ProtocolBuffers.TestProtos;
  using NUnit.Framework;
  
  namespace Google.ProtocolBuffers
  {
      public class AbstractBuilderLiteTest
      {
          [Test]
          public void TestMergeFromCodedInputStream()
          {
              TestAllTypesLite copy,
                               msg = TestAllTypesLite.CreateBuilder()
                                   .SetOptionalUint32(uint.MaxValue).Build();
  
              copy = TestAllTypesLite.DefaultInstance;
              Assert.AreNotEqual(msg.ToByteArray(), copy.ToByteArray());
  
              using (MemoryStream ms = new MemoryStream(msg.ToByteArray()))
              {
                  CodedInputStream ci = CodedInputStream.CreateInstance(ms);
                  copy = copy.ToBuilder().MergeFrom(ci).Build();
              }
  
              Assert.AreEqual(msg.ToByteArray(), copy.ToByteArray());
          }
  
          [Test]
          public void TestIBuilderLiteWeakClear()
          {
              TestAllTypesLite copy, msg = TestAllTypesLite.DefaultInstance;
  
              copy = msg.ToBuilder().SetOptionalString("Should be removed.").Build();
              Assert.AreNotEqual(msg.ToByteArray(), copy.ToByteArray());
  
              copy = (TestAllTypesLite) ((IBuilderLite) copy.ToBuilder()).WeakClear().WeakBuild();
              Assert.AreEqual(msg.ToByteArray(), copy.ToByteArray());
          }
  
          [Test]
          public void TestBuilderLiteMergeFromCodedInputStream()
          {
              TestAllTypesLite copy,
                               msg = TestAllTypesLite.CreateBuilder()
                                   .SetOptionalString("Should be merged.").Build();
  
              copy = TestAllTypesLite.DefaultInstance;
              Assert.AreNotEqual(msg.ToByteArray(), copy.ToByteArray());
  
              copy =
                  copy.ToBuilder().MergeFrom(CodedInputStream.CreateInstance(new MemoryStream(msg.ToByteArray()))).Build();
              Assert.AreEqual(msg.ToByteArray(), copy.ToByteArray());
          }
  
          [Test]
          public void TestBuilderLiteMergeDelimitedFrom()
          {
              TestAllTypesLite copy,
                               msg = TestAllTypesLite.CreateBuilder()
                                   .SetOptionalString("Should be merged.").Build();
  
              copy = TestAllTypesLite.DefaultInstance;
              Assert.AreNotEqual(msg.ToByteArray(), copy.ToByteArray());
              Stream s = new MemoryStream();
              msg.WriteDelimitedTo(s);
              s.Position = 0;
              copy = copy.ToBuilder().MergeDelimitedFrom(s).Build();
              Assert.AreEqual(msg.ToByteArray(), copy.ToByteArray());
          }
  
          [Test]
          public void TestBuilderLiteMergeDelimitedFromExtensions()
          {
              TestAllExtensionsLite copy,
                                    msg = TestAllExtensionsLite.CreateBuilder()
                                        .SetExtension(UnittestLite.OptionalStringExtensionLite,
                                                      "Should be merged.").Build();
  
              copy = TestAllExtensionsLite.DefaultInstance;
              Assert.AreNotEqual(msg.ToByteArray(), copy.ToByteArray());
  
              Stream s = new MemoryStream();
              msg.WriteDelimitedTo(s);
              s.Position = 0;
  
              ExtensionRegistry registry = ExtensionRegistry.CreateInstance();
              UnittestLite.RegisterAllExtensions(registry);
  
              copy = copy.ToBuilder().MergeDelimitedFrom(s, registry).Build();
              Assert.AreEqual(msg.ToByteArray(), copy.ToByteArray());
              Assert.AreEqual("Should be merged.", copy.GetExtension(UnittestLite.OptionalStringExtensionLite));
          }
  
          [Test]
          public void TestBuilderLiteMergeFromStream()
          {
              TestAllTypesLite copy,
                               msg = TestAllTypesLite.CreateBuilder()
                                   .SetOptionalString("Should be merged.").Build();
  
              copy = TestAllTypesLite.DefaultInstance;
              Assert.AreNotEqual(msg.ToByteArray(), copy.ToByteArray());
              Stream s = new MemoryStream();
              msg.WriteTo(s);
              s.Position = 0;
              copy = copy.ToBuilder().MergeFrom(s).Build();
              Assert.AreEqual(msg.ToByteArray(), copy.ToByteArray());
          }
  
          [Test]
          public void TestBuilderLiteMergeFromStreamExtensions()
          {
              TestAllExtensionsLite copy,
                                    msg = TestAllExtensionsLite.CreateBuilder()
                                        .SetExtension(UnittestLite.OptionalStringExtensionLite,
                                                      "Should be merged.").Build();
  
              copy = TestAllExtensionsLite.DefaultInstance;
              Assert.AreNotEqual(msg.ToByteArray(), copy.ToByteArray());
  
              Stream s = new MemoryStream();
              msg.WriteTo(s);
              s.Position = 0;
  
              ExtensionRegistry registry = ExtensionRegistry.CreateInstance();
              UnittestLite.RegisterAllExtensions(registry);
  
              copy = copy.ToBuilder().MergeFrom(s, registry).Build();
              Assert.AreEqual(msg.ToByteArray(), copy.ToByteArray());
              Assert.AreEqual("Should be merged.", copy.GetExtension(UnittestLite.OptionalStringExtensionLite));
          }
  
          [Test]
          public void TestIBuilderLiteWeakMergeFromIMessageLite()
          {
              TestAllTypesLite copy,
                               msg = TestAllTypesLite.CreateBuilder()
                                   .SetOptionalString("Should be merged.").Build();
  
              copy = TestAllTypesLite.DefaultInstance;
              Assert.AreNotEqual(msg.ToByteArray(), copy.ToByteArray());
  
              copy = (TestAllTypesLite) ((IBuilderLite) copy.ToBuilder()).WeakMergeFrom((IMessageLite) msg).WeakBuild();
              Assert.AreEqual(msg.ToByteArray(), copy.ToByteArray());
          }
  
          [Test]
          public void TestIBuilderLiteWeakMergeFromByteString()
          {
              TestAllTypesLite copy,
                               msg = TestAllTypesLite.CreateBuilder()
                                   .SetOptionalString("Should be merged.").Build();
  
              copy = TestAllTypesLite.DefaultInstance;
              Assert.AreNotEqual(msg.ToByteArray(), copy.ToByteArray());
  
              copy = (TestAllTypesLite) ((IBuilderLite) copy.ToBuilder()).WeakMergeFrom(msg.ToByteString()).WeakBuild();
              Assert.AreEqual(msg.ToByteArray(), copy.ToByteArray());
          }
  
          [Test]
          public void TestIBuilderLiteWeakMergeFromByteStringExtensions()
          {
              TestAllExtensionsLite copy,
                                    msg = TestAllExtensionsLite.CreateBuilder()
                                        .SetExtension(UnittestLite.OptionalStringExtensionLite,
                                                      "Should be merged.").Build();
  
              copy = TestAllExtensionsLite.DefaultInstance;
              Assert.AreNotEqual(msg.ToByteArray(), copy.ToByteArray());
  
              copy =
                  (TestAllExtensionsLite)
                  ((IBuilderLite) copy.ToBuilder()).WeakMergeFrom(msg.ToByteString(), ExtensionRegistry.Empty).WeakBuild();
              Assert.AreNotEqual(msg.ToByteArray(), copy.ToByteArray());
  
              ExtensionRegistry registry = ExtensionRegistry.CreateInstance();
              UnittestLite.RegisterAllExtensions(registry);
  
              copy =
                  (TestAllExtensionsLite)
                  ((IBuilderLite) copy.ToBuilder()).WeakMergeFrom(msg.ToByteString(), registry).WeakBuild();
              Assert.AreEqual(msg.ToByteArray(), copy.ToByteArray());
              Assert.AreEqual("Should be merged.", copy.GetExtension(UnittestLite.OptionalStringExtensionLite));
          }
  
          [Test]
          public void TestIBuilderLiteWeakMergeFromCodedInputStream()
          {
              TestAllTypesLite copy,
                               msg = TestAllTypesLite.CreateBuilder()
                                   .SetOptionalUint32(uint.MaxValue).Build();
  
              copy = TestAllTypesLite.DefaultInstance;
              Assert.AreNotEqual(msg.ToByteArray(), copy.ToByteArray());
  
              using (MemoryStream ms = new MemoryStream(msg.ToByteArray()))
              {
                  CodedInputStream ci = CodedInputStream.CreateInstance(ms);
                  copy = (TestAllTypesLite) ((IBuilderLite) copy.ToBuilder()).WeakMergeFrom(ci).WeakBuild();
              }
  
              Assert.AreEqual(msg.ToByteArray(), copy.ToByteArray());
          }
  
          [Test]
          public void TestIBuilderLiteWeakBuildPartial()
          {
  
gt:             IBuilderLite builder = TestRequiredLite.CreateBuilder();