package org.apache.commons.jcs3.auxiliary.disk.indexed;
   
   import org.apache.commons.jcs3.auxiliary.disk.DiskTestObject;
   import org.apache.commons.jcs3.utils.timing.SleepUtil;
   import org.apache.commons.jcs3.engine.behavior.ICacheElement;
   
   /*
    * 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.
   */
  
  import junit.framework.TestCase;
  
  /**
   * Tests for the optimization routine.
   */
  public class IndexedDiskCacheOptimizationUnitTest
      extends TestCase
  {
      /**
       * Set the optimize at remove count to 10. Add 20. Check the file size. Remove 10. Check the
       * times optimized. Check the file size.
       * @throws Exception
       */
      public void testBasicOptimization()
          throws Exception
      {
          // SETUP
          final int removeCount = 50;
  
          final IndexedDiskCacheAttributes cattr = new IndexedDiskCacheAttributes();
          cattr.setCacheName( "testOptimization" );
          cattr.setMaxKeySize( removeCount * 2 );
          cattr.setOptimizeAtRemoveCount( removeCount );
          cattr.setDiskPath( "target/test-sandbox/testOptimization" );
          final IndexedDiskCache<Integer, DiskTestObject> disk = new IndexedDiskCache<>( cattr );
  
          disk.removeAll();
  
          final int numberToInsert = removeCount * 3;
          final ICacheElement<Integer, DiskTestObject>[] elements = DiskTestObjectUtil
              .createCacheElementsWithTestObjectsOfVariableSizes( numberToInsert, cattr.getCacheName() );
  
          for (final ICacheElement<Integer, DiskTestObject> element : elements) {
              disk.processUpdate( element );
          }
  
  
          Thread.sleep( 1000 );
          final long sizeBeforeRemove = disk.getDataFileSize();
          // System.out.println( "file sizeBeforeRemove " + sizeBeforeRemove );
          // System.out.println( "totalSize inserted " + DiskTestObjectUtil.totalSize( elements, numberToInsert ) );
  
          // DO WORK
          for ( int i = 0; i < removeCount; i++ )
          {
              disk.processRemove( Integer.valueOf( i ) );
          }
  
          SleepUtil.sleepAtLeast( 1000 );
  
          disk.optimizeFile();
          // VERIFY
          final long sizeAfterRemove = disk.getDataFileSize();
          final long expectedSizeAfterRemove = DiskTestObjectUtil.totalSize( elements, removeCount, elements.length );
  
          // test is prone to failure for timing reasons.
          if ( expectedSizeAfterRemove != sizeAfterRemove )
          {
              SleepUtil.sleepAtLeast( 2000 );
          }
  
          assertTrue( "The post optimization size should be smaller."
                  +"sizeAfterRemove=" + sizeAfterRemove + " sizeBeforeRemove= " +sizeBeforeRemove
                  , sizeAfterRemove < sizeBeforeRemove );
          assertEquals( "The file size is not as expected size.", expectedSizeAfterRemove, sizeAfterRemove );
      }
  }