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.type.codec;
  
  import static org.assertj.core.api.Assertions.assertThat;
  
  import com.datastax.oss.driver.api.core.ProtocolVersion;
  import com.datastax.oss.driver.api.core.type.DataTypes;
  import com.datastax.oss.driver.api.core.type.codec.TypeCodecs;
  import com.datastax.oss.driver.api.core.type.reflect.GenericType;
  import com.datastax.oss.protocol.internal.util.Bytes;
  import java.nio.ByteBuffer;
  import java.nio.MappedByteBuffer;
  import org.junit.Test;
  
  public class CustomCodecTest extends CodecTestBase<ByteBuffer> {
    private static final ByteBuffer BUFFER = Bytes.fromHexString("0xcafebabe");
  
    public CustomCodecTest() {
      this.codec = TypeCodecs.custom(DataTypes.custom("com.test.MyClass"));
    }
  
    @Test
    public void should_encode() {
      assertThat(encode(BUFFER)).isEqualTo("0xcafebabe");
      assertThat(encode(null)).isNull();
    }
  
    @Test
    public void should_not_share_position_between_input_and_encoded() {
      int inputPosition = BUFFER.position();
      ByteBuffer encoded = codec.encode(BUFFER, ProtocolVersion.DEFAULT);
      // Read from the encoded buffer to change its position
      encoded.get();
      // The input buffer should not be affected
      assertThat(BUFFER.position()).isEqualTo(inputPosition);
    }
  
    @Test
    public void should_decode() {
      assertThat(decode("0xcafebabe")).isEqualTo(BUFFER);
      assertThat(decode("0x").capacity()).isEqualTo(0);
      assertThat(decode(null)).isNull();
    }
  
    @Test
    public void should_not_share_position_between_decoded_and_input() {
      int inputPosition = BUFFER.position();
      ByteBuffer decoded = codec.decode(BUFFER, ProtocolVersion.DEFAULT);
      // Read from the decoded buffer to change its position
      decoded.get();
      // The input buffer should not be affected
      assertThat(BUFFER.position()).isEqualTo(inputPosition);
    }
  
    @Test
    public void should_format() {
      assertThat(format(BUFFER)).isEqualTo("0xcafebabe");
      assertThat(format(null)).isEqualTo("NULL");
    }
  
    @Test
    public void should_parse() {
      assertThat(parse("0xcafebabe")).isEqualTo(BUFFER);
      assertThat(parse("NULL")).isNull();
      assertThat(parse("null")).isNull();
      assertThat(parse("")).isNull();
      assertThat(parse(null)).isNull();
    }
  
    @Test(expected = IllegalArgumentException.class)
    public void should_fail_to_parse_invalid_input() {
      parse("not a blob");
    }
  
    @Test
    public void should_accept_generic_type() {
      assertThat(codec.accepts(GenericType.of(ByteBuffer.class))).isTrue();
      assertThat(codec.accepts(GenericType.of(MappedByteBuffer.class)))
          .isFalse(); // covariance not allowed
    }
  
    @Test
    public void should_accept_raw_type() {
      assertThat(codec.accepts(ByteBuffer.class)).isTrue();
      assertThat(codec.accepts(MappedByteBuffer.class)).isFalse(); // covariance not allowed
    }
  
    @Test
    public void should_accept_object() {
      assertThat(codec.accepts(BUFFER)).isTrue();
      assertThat(codec.accepts(MappedByteBuffer.allocate(0))).isTrue(); // covariance allowed
    }
  }
  