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,
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  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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  // (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 static org.junit.Assert.assertFalse;
  import static org.junit.Assert.assertNull;
  
  import com.google.protobuf.testing.Proto2Testing.Proto2Empty;
  import com.google.protobuf.testing.Proto2Testing.Proto2Message;
  import com.google.protobuf.testing.Proto2Testing.Proto2Message.TestEnum;
  import com.google.protobuf.testing.Proto2Testing.Proto2MessageWithMaps;
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.util.List;
  import org.junit.Test;
  
  /** Base class for tests using {@link Proto2Message}. */
  public abstract class AbstractProto2SchemaTest extends AbstractSchemaTest<Proto2Message> {
  
    @Override
    protected Proto2MessageFactory messageFactory() {
      return new Proto2MessageFactory(10, 20, 2, 2);
    }
  
    @Test
    public void mergeOptionalMessageFields() throws Exception {
      Proto2Message message1 =
          newBuilder()
              .setFieldMessage10(newBuilder().setFieldInt643(123).clearFieldInt325().build())
              .build();
      Proto2Message message2 =
          newBuilder()
              .setFieldMessage10(newBuilder().clearFieldInt643().setFieldInt325(456).build())
              .build();
      Proto2Message 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();
  
      Proto2Message merged = ExperimentalSerializationUtil.fromByteArray(data, Proto2Message.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());
      roundtrip(
          "Field 69",
          newBuilder()
              .setFieldGroup69(
                  Proto2Message.FieldGroup69.newBuilder().setFieldInt3270(data().getInt()))
              .build());
    }
  
    private Proto2Message.Builder newBuilder() {
      return messageFactory().newMessage().toBuilder();
    }
  
    @Test
    public void mapsShouldRoundtrip() throws IOException {
      roundtrip(
          "Proto2MessageWithMaps",
          new Proto2MessageFactory(2, 10, 2, 2).newMessageWithMaps(),
          Protobuf.getInstance().schemaFor(Proto2MessageWithMaps.class));
    }
  
    @Test
    public void unknownFieldsUnrecognized() throws Exception {
      Proto2Message expectedMessage = messageFactory().newMessage();
      byte[] serializedBytes = expectedMessage.toByteArray();
      Proto2Empty empty =
          ExperimentalSerializationUtil.fromByteArray(serializedBytes, Proto2Empty.class);
  
      // Merge serialized bytes into an empty message, then reserialize and merge it to a new
      // Proto2Message. Make sure the two messages equal.
      byte[] roundtripBytes = ExperimentalSerializationUtil.toByteArray(empty);
      assertEquals(serializedBytes.length, roundtripBytes.length);
      Proto2Message roundtripMessage =
          ExperimentalSerializationUtil.fromByteArray(roundtripBytes, Proto2Message.class);
      assertEquals(expectedMessage, roundtripMessage);
    }
  
    @Test
    public void unknownEnum() throws IOException {
      // Use unknown fields to hold invalid enum values.
      UnknownFieldSetLite unknowns = UnknownFieldSetLite.newInstance();
      final int outOfRange = 1000;
      assertNull(TestEnum.forNumber(outOfRange));
      unknowns.storeField(
          WireFormat.makeTag(Proto2Message.FIELD_ENUM_13_FIELD_NUMBER, WireFormat.WIRETYPE_VARINT),
          (long) outOfRange);
      unknowns.storeField(
          WireFormat.makeTag(
              Proto2Message.FIELD_ENUM_LIST_30_FIELD_NUMBER, WireFormat.WIRETYPE_VARINT),
          (long) TestEnum.ONE_VALUE);
      unknowns.storeField(
          WireFormat.makeTag(
              Proto2Message.FIELD_ENUM_LIST_30_FIELD_NUMBER, WireFormat.WIRETYPE_VARINT),
          (long) outOfRange);
      unknowns.storeField(
          WireFormat.makeTag(
              Proto2Message.FIELD_ENUM_LIST_30_FIELD_NUMBER, WireFormat.WIRETYPE_VARINT),
          (long) TestEnum.TWO_VALUE);
  
      {
        // Construct a packed enum list.
        int packedSize =
            CodedOutputStream.computeUInt32SizeNoTag(TestEnum.ONE_VALUE)
                + CodedOutputStream.computeUInt32SizeNoTag(outOfRange)
                + CodedOutputStream.computeUInt32SizeNoTag(TestEnum.ONE_VALUE);
        ByteString.CodedBuilder packedBuilder = ByteString.newCodedBuilder(packedSize);
        CodedOutputStream packedOut = packedBuilder.getCodedOutput();
        packedOut.writeEnumNoTag(TestEnum.ONE_VALUE);
        packedOut.writeEnumNoTag(outOfRange);
        packedOut.writeEnumNoTag(TestEnum.TWO_VALUE);
        unknowns.storeField(
            WireFormat.makeTag(
                Proto2Message.FIELD_ENUM_LIST_PACKED_44_FIELD_NUMBER,
                WireFormat.WIRETYPE_LENGTH_DELIMITED),
            packedBuilder.build());
      }
      int size = unknowns.getSerializedSize();
      byte[] output = new byte[size];
      CodedOutputStream codedOutput = CodedOutputStream.newInstance(output);
      unknowns.writeTo(codedOutput);
      codedOutput.flush();
  
      Proto2Message parsed = ExperimentalSerializationUtil.fromByteArray(output, Proto2Message.class);
      assertFalse("out-of-range singular enum should not be in message", parsed.hasFieldEnum13());
      {
        List<Long> singularEnum =
            parsed
                .getUnknownFields()
                .getField(Proto2Message.FIELD_ENUM_13_FIELD_NUMBER)
                .getVarintList();
        assertEquals(1, singularEnum.size());
        assertEquals((Long) (long) outOfRange, singularEnum.get(0));
      }
      {
        List<Long> repeatedEnum =
            parsed
                .getUnknownFields()
                .getField(Proto2Message.FIELD_ENUM_LIST_30_FIELD_NUMBER)
                .getVarintList();
        assertEquals(1, repeatedEnum.size());
        assertEquals((Long) (long) outOfRange, repeatedEnum.get(0));
      }
      {
        List<Long> packedRepeatedEnum =
            parsed
                .getUnknownFields()
                .getField(Proto2Message.FIELD_ENUM_LIST_PACKED_44_FIELD_NUMBER)
                .getVarintList();
        assertEquals(1, packedRepeatedEnum.size());
        assertEquals((Long) (long) outOfRange, packedRepeatedEnum.get(0));
      }
      assertEquals(
          "out-of-range repeated enum should not be in message", 2, parsed.getFieldEnumList30Count());
      assertEquals(TestEnum.ONE, parsed.getFieldEnumList30(0));
      assertEquals(TestEnum.TWO, parsed.getFieldEnumList30(1));
      assertEquals(
          "out-of-range packed repeated enum should not be in message",
          2,
          parsed.getFieldEnumListPacked44Count());
      assertEquals(TestEnum.ONE, parsed.getFieldEnumListPacked44(0));
      assertEquals(TestEnum.TWO, parsed.getFieldEnumListPacked44(1));
    }
  
    @Override
    protected List<Proto2Message> newMessagesMissingRequiredFields() {
      return messageFactory().newMessagesMissingRequiredFields();
    }
  }
  