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.record;
  
  import org.apache.kafka.common.utils.BufferSupplier;
  
  import org.junit.jupiter.api.Test;
  
  import java.nio.ByteBuffer;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertSame;
  
  public class BufferSupplierTest {
  
      @Test
      public void testGrowableBuffer() {
          BufferSupplier.GrowableBufferSupplier supplier = new BufferSupplier.GrowableBufferSupplier();
          ByteBuffer buffer = supplier.get(1024);
          assertEquals(0, buffer.position());
          assertEquals(1024, buffer.capacity());
          supplier.release(buffer);
  
          ByteBuffer cached = supplier.get(512);
          assertEquals(0, cached.position());
          assertSame(buffer, cached);
  
          ByteBuffer increased = supplier.get(2048);
          assertEquals(2048, increased.capacity());
          assertEquals(0, increased.position());
      }
  
  }
  