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.io.compress;
  
  
  import org.junit.Test;
  
  import org.apache.cassandra.io.util.File;
  import org.apache.cassandra.io.util.Memory;
  import org.apache.cassandra.schema.CompressionParams;
  
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
  
  public class CompressionMetadataTest
  {
      File chunksIndexFile = new File("/path/to/metadata");
      CompressionParams params = CompressionParams.zstd();
      long dataLength = 1000;
      long compressedFileLength = 100;
  
      private CompressionMetadata newCompressionMetadata(Memory memory)
      {
          return new CompressionMetadata(chunksIndexFile,
                                         params,
                                         memory,
                                         memory.size(),
                                         dataLength,
                                         compressedFileLength);
      }
  
      @Test
      public void testMemoryIsFreed()
      {
          Memory memory = Memory.allocate(10);
          CompressionMetadata cm = newCompressionMetadata(memory);
  
          cm.close();
          assertThat(cm.isCleanedUp()).isTrue();
          assertThatExceptionOfType(AssertionError.class).isThrownBy(memory::size);
      }
  
      @Test
      public void testMemoryIsShared()
      {
          Memory memory = Memory.allocate(10);
          CompressionMetadata cm = newCompressionMetadata(memory);
  
          CompressionMetadata copy = cm.sharedCopy();
          assertThat(copy).isNotSameAs(cm);
  
          cm.close();
          assertThat(cm.isCleanedUp()).isFalse();
          assertThat(copy.isCleanedUp()).isFalse();
          assertThat(memory.size()).isEqualTo(10); // expected that no expection is thrown since memory should not be released yet
  
          copy.close();
          assertThat(cm.isCleanedUp()).isTrue();
          assertThat(copy.isCleanedUp()).isTrue();
          assertThatExceptionOfType(AssertionError.class).isThrownBy(memory::size);
      }
  }