content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.datastax.oss.driver.internal.core.protocol;
  
  import static org.assertj.core.api.Assertions.assertThat;
  
  import com.datastax.oss.driver.shaded.guava.common.base.Strings;
  import com.datastax.oss.protocol.internal.Compressor;
  import com.datastax.oss.protocol.internal.Frame;
  import com.datastax.oss.protocol.internal.FrameCodec;
  import com.datastax.oss.protocol.internal.Message;
  import com.datastax.oss.protocol.internal.ProtocolConstants;
  import com.datastax.oss.protocol.internal.ProtocolV5ClientCodecs;
  import com.datastax.oss.protocol.internal.ProtocolV5ServerCodecs;
  import com.datastax.oss.protocol.internal.Segment;
  import com.datastax.oss.protocol.internal.request.AuthResponse;
  import com.datastax.oss.protocol.internal.response.result.Void;
  import com.datastax.oss.protocol.internal.util.Bytes;
  import io.netty.buffer.ByteBuf;
  import io.netty.buffer.UnpooledByteBufAllocator;
  import io.netty.channel.embedded.EmbeddedChannel;
  import java.util.Collections;
  import org.junit.Before;
  import org.junit.Test;
  
  public class SegmentToFrameDecoderTest {
  
    private static final FrameCodec<ByteBuf> FRAME_CODEC =
        new FrameCodec<>(
            new ByteBufPrimitiveCodec(UnpooledByteBufAllocator.DEFAULT),
            Compressor.none(),
            new ProtocolV5ClientCodecs(),
            new ProtocolV5ServerCodecs());
  
    private EmbeddedChannel channel;
  
    @Before
    public void setup() {
      channel = new EmbeddedChannel();
      channel.pipeline().addLast(new SegmentToFrameDecoder(FRAME_CODEC, "test"));
    }
  
    @Test
    public void should_decode_self_contained() {
      ByteBuf payload = UnpooledByteBufAllocator.DEFAULT.buffer();
      payload.writeBytes(encodeFrame(Void.INSTANCE));
      payload.writeBytes(encodeFrame(new AuthResponse(Bytes.fromHexString("0xabcdef"))));
  
      channel.writeInbound(new Segment<>(payload, true));
  
      Frame frame1 = channel.readInbound();
      assertThat(frame1.message).isInstanceOf(Void.class);
      Frame frame2 = channel.readInbound();
      assertThat(frame2.message).isInstanceOf(AuthResponse.class);
    }
  
    @Test
    public void should_decode_sequence_of_slices() {
      ByteBuf encodedFrame =
          encodeFrame(new AuthResponse(Bytes.fromHexString("0x" + Strings.repeat("aa", 1011))));
      int sliceLength = 100;
      do {
        ByteBuf payload =
            encodedFrame.readRetainedSlice(Math.min(sliceLength, encodedFrame.readableBytes()));
        channel.writeInbound(new Segment<>(payload, false));
      } while (encodedFrame.isReadable());
  
      Frame frame = channel.readInbound();
      assertThat(frame.message).isInstanceOf(AuthResponse.class);
    }
  
    private static ByteBuf encodeFrame(Message message) {
      Frame frame =
          Frame.forResponse(
              ProtocolConstants.Version.V5,
              1,
              null,
              Collections.emptyMap(),
              Collections.emptyList(),
              message);
      return FRAME_CODEC.encode(frame);
    }
  }
  