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 org.apache.cassandra.sidecar.client;
  
  import java.nio.ByteBuffer;
  import java.nio.charset.StandardCharsets;
  
  import org.junit.jupiter.api.BeforeAll;
  import org.junit.jupiter.api.Test;
  
  import static org.assertj.core.api.Assertions.assertThat;
  
  /**
   * Unit tests for {@link StreamBuffer}
   */
  class StreamBufferTest
  {
      static byte[] source;
      static StreamBuffer.ByteArrayWrapper streamBuffer;
  
      @BeforeAll
      static void setup()
      {
          source = new byte[1024];
          source[5] = 'a';
          streamBuffer = StreamBuffer.wrap(source);
      }
  
      @Test
      void testStreamBuffer()
      {
          assertThat(streamBuffer).isNotNull();
          assertThat(streamBuffer.readableBytes()).isEqualTo(1024);
          assertThat(streamBuffer.getByte(5)).isEqualTo((byte) 'a');
          streamBuffer.release(); // do nothing
      }
  
      @Test
      void testCopyToByteArray()
      {
          byte[] dst = new byte[1];
          streamBuffer.copyBytes(5, dst, 0, 1);
          assertThat(dst[0]).isEqualTo((byte) 'a');
      }
  
      @Test
      void testFullCopyBytesToByteBuffer()
      {
          StreamBuffer streamBuffer = StreamBuffer.wrap("Hello World".getBytes(StandardCharsets.UTF_8));
          ByteBuffer destination = ByteBuffer.allocate(20);
          streamBuffer.copyBytes(0, destination, 11);
          assertThat(destination.hasArray()).isTrue();
          assertThat(destination.position()).isEqualTo(0);
          assertThat(destination.limit()).isEqualTo(11);
          byte[] dst = new byte[destination.limit()];
          destination.get(dst, 0, dst.length);
          assertThat(new String(dst, StandardCharsets.UTF_8)).isEqualTo("Hello World");
      }
  
      @Test
      void testPartialCopyBytesToByteBuffer()
      {
          StreamBuffer streamBuffer = StreamBuffer.wrap("Hello World".getBytes(StandardCharsets.UTF_8));
          ByteBuffer destination = ByteBuffer.allocate(20);
          streamBuffer.copyBytes(0, destination, 5);
          assertThat(destination.hasArray()).isTrue();
          assertThat(destination.position()).isEqualTo(0);
          assertThat(destination.limit()).isEqualTo(5);
          byte[] dst = new byte[destination.limit()];
          destination.get(dst, 0, dst.length);
          assertThat(new String(dst, StandardCharsets.UTF_8)).isEqualTo("Hello");
      }
  
      @Test
      void testGetByte()
      {
          String inputString = "take me, one at a time";
          StreamBuffer streamBuffer = StreamBuffer.wrap(inputString.getBytes(StandardCharsets.UTF_8));
          for (int i = 0; i < inputString.length(); i++)
          {
              assertThat(streamBuffer.getByte(i)).isEqualTo((byte) inputString.charAt(i));
          }
      }
  }
  