content: // Protocol Buffers - Google's data interchange format
  // Copyright 2008 Google Inc.  All rights reserved.
  // https://developers.google.com/protocol-buffers/
  //
  // 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.
  
  package com.google.protobuf;
  
  import static org.junit.Assert.assertEquals;
  
  import com.google.protobuf.testing.Proto3Testing.Proto3Empty;
  import com.google.protobuf.testing.Proto3Testing.Proto3Message;
  import com.google.protobuf.testing.Proto3Testing.Proto3MessageWithMaps;
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.nio.ByteBuffer;
  import java.util.ArrayList;
  import java.util.List;
  import org.junit.Test;
  
  /** Base class for tests using {@link Proto3Message}. */
  public abstract class AbstractProto3SchemaTest extends AbstractSchemaTest<Proto3Message> {
    @Override
    protected Proto3MessageFactory messageFactory() {
      return new Proto3MessageFactory(10, 20, 2, 2);
    }
  
    @Override
    protected List<ByteBuffer> serializedBytesWithInvalidUtf8() throws IOException {
      List<ByteBuffer> invalidBytes = new ArrayList<>();
      byte[] invalid = new byte[] {(byte) 0x80};
      {
        ByteBuffer buffer = ByteBuffer.allocate(100);
        CodedOutputStream codedOutput = CodedOutputStream.newInstance(buffer);
        codedOutput.writeByteArray(Proto3Message.FIELD_STRING_9_FIELD_NUMBER, invalid);
        codedOutput.flush();
        buffer.flip();
        invalidBytes.add(buffer);
      }
      {
        ByteBuffer buffer = ByteBuffer.allocate(100);
        CodedOutputStream codedOutput = CodedOutputStream.newInstance(buffer);
        codedOutput.writeByteArray(Proto3Message.FIELD_STRING_LIST_26_FIELD_NUMBER, invalid);
        codedOutput.flush();
        buffer.flip();
        invalidBytes.add(buffer);
      }
      return invalidBytes;
    }
  
    @Test
    public void mergeOptionalMessageFields() throws Exception {
      Proto3Message message1 =
          newBuilder()
              .setFieldMessage10(newBuilder().setFieldInt643(123).clearFieldInt325().build())
              .build();
      Proto3Message message2 =
          newBuilder()
              .setFieldMessage10(newBuilder().clearFieldInt643().setFieldInt325(456).build())
              .build();
      Proto3Message message3 =
          newBuilder()
              .setFieldMessage10(newBuilder().setFieldInt643(789).clearFieldInt325().build())
              .build();
      ByteArrayOutputStream output = new ByteArrayOutputStream();
      message1.writeTo(output);
      message2.writeTo(output);
      message3.writeTo(output);
      byte[] data = output.toByteArray();
  
      Proto3Message merged = ExperimentalSerializationUtil.fromByteArray(data, Proto3Message.class);
      assertEquals(789, merged.getFieldMessage10().getFieldInt643());
      assertEquals(456, merged.getFieldMessage10().getFieldInt325());
    }
  
    @Test
    public void oneofFieldsShouldRoundtrip() throws IOException {
      roundtrip("Field 53", newBuilder().setFieldDouble53(100).build());
      roundtrip("Field 54", newBuilder().setFieldFloat54(100).build());
      roundtrip("Field 55", newBuilder().setFieldInt6455(100).build());
      roundtrip("Field 56", newBuilder().setFieldUint6456(100L).build());
      roundtrip("Field 57", newBuilder().setFieldInt3257(100).build());
      roundtrip("Field 58", newBuilder().setFieldFixed6458(100).build());
      roundtrip("Field 59", newBuilder().setFieldFixed3259(100).build());
      roundtrip("Field 60", newBuilder().setFieldBool60(true).build());
      roundtrip("Field 61", newBuilder().setFieldString61(data().getString()).build());
      roundtrip(
          "Field 62", newBuilder().setFieldMessage62(newBuilder().setFieldDouble1(100)).build());
      roundtrip("Field 63", newBuilder().setFieldBytes63(data().getBytes()).build());
      roundtrip("Field 64", newBuilder().setFieldUint3264(100).build());
      roundtrip("Field 65", newBuilder().setFieldSfixed3265(100).build());
      roundtrip("Field 66", newBuilder().setFieldSfixed6466(100).build());
      roundtrip("Field 67", newBuilder().setFieldSint3267(100).build());
      roundtrip("Field 68", newBuilder().setFieldSint6468(100).build());
    }
  
    @Test
    public void preserveUnknownFields() {
      Proto3Message expectedMessage = messageFactory().newMessage();
      Proto3Empty empty =
          ExperimentalSerializationUtil.fromByteArray(
              expectedMessage.toByteArray(), Proto3Empty.class);
      assertEquals(expectedMessage.getSerializedSize(), empty.getSerializedSize());
      assertEquals(expectedMessage.toByteString(), empty.toByteString());
    }
  
    @Test
    public void preserveUnknownFieldsProto2() {
      // Make sure we will be able to preserve valid proto2 wireformat, including those that are not
      // supported in proto3, e.g. groups.
      byte[] payload = new Proto2MessageFactory(10, 20, 2, 2).newMessage().toByteArray();
      Proto3Empty empty = ExperimentalSerializationUtil.fromByteArray(payload, Proto3Empty.class);
      assertEquals(payload.length, empty.getSerializedSize());
    }
  
    @Test
    public void mapsShouldRoundtrip() throws IOException {
      roundtrip(
          "Proto3MessageWithMaps",
          new Proto3MessageFactory(2, 10, 2, 2).newMessageWithMaps(),
          Protobuf.getInstance().schemaFor(Proto3MessageWithMaps.class));
    }
  
    private static Proto3Message.Builder newBuilder() {
      return Proto3Message.newBuilder();
    }
  }
  