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.kafka.common.protocol;
  
  import org.junit.jupiter.api.Test;
  
  import java.nio.ByteBuffer;
  import java.nio.charset.StandardCharsets;
  
  import static org.junit.jupiter.api.Assertions.assertArrayEquals;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  public class ByteBufferAccessorTest {
      @Test
      public void testReadArray() {
          ByteBuffer buf = ByteBuffer.allocate(1024);
          ByteBufferAccessor accessor = new ByteBufferAccessor(buf);
          final byte[] testArray = new byte[] {0x4b, 0x61, 0x46};
          accessor.writeByteArray(testArray);
          accessor.writeInt(12345);
          accessor.flip();
          final byte[] testArray2 = accessor.readArray(3);
          assertArrayEquals(testArray, testArray2);
          assertEquals(12345, accessor.readInt());
          assertEquals("Error reading byte array of 3 byte(s): only 0 byte(s) available",
              assertThrows(RuntimeException.class,
                  () -> accessor.readArray(3)).getMessage());
      }
  
      @Test
      public void testReadString() {
          ByteBuffer buf = ByteBuffer.allocate(1024);
          ByteBufferAccessor accessor = new ByteBufferAccessor(buf);
          String testString = "ABC";
          final byte[] testArray = testString.getBytes(StandardCharsets.UTF_8);
          accessor.writeByteArray(testArray);
          accessor.flip();
          assertEquals("ABC", accessor.readString(3));
          assertEquals("Error reading byte array of 2 byte(s): only 0 byte(s) available",
                  assertThrows(RuntimeException.class,
                          () -> accessor.readString(2)).getMessage());
      }
  }
  