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   * Licensed to the Apache Software Foundation (ASF) under one
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   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
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   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
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  package org.apache.cassandra.index.sai.functional;
  
  import org.junit.Test;
  
  import org.apache.cassandra.index.sai.SAITester;
  
  import static org.junit.Assert.assertEquals;
  
  public class DiskSpaceTest extends SAITester
  {
      @Test
      public void testTableTotalDiskSpaceUsed() throws Throwable
      {
          createTable(CREATE_TABLE_TEMPLATE);
  
          int rows = 1000;
          for (int j = 0; j < rows; j++)
          {
              execute("INSERT INTO %s (id1, v1) VALUES (?, 1)", Integer.toString(j));
          }
          flush();
  
          long sstableSize = totalDiskSpaceUsed();
  
          // create index, disk space should include index components
          String indexName = createIndex(String.format(CREATE_INDEX_TEMPLATE, "v1"));
          waitForTableIndexesQueryable();
  
          long indexSize = indexDiskSpaceUse();
          long sstableSizeWithIndex = totalDiskSpaceUsed();
          assertEquals(sstableSize + indexSize, sstableSizeWithIndex);
          verifyIndexComponentsIncludedInSSTable();
  
          // drop index, disk space should not include index, but SSTables still include index components
          dropIndex("DROP INDEX %s." + indexName);
          assertEquals(sstableSize, totalDiskSpaceUsed());
          verifyIndexComponentsNotIncludedInSSTable();
      }
  }
  