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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
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  package org.apache.cassandra.db.compaction;
  
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.Set;
  
  import org.junit.BeforeClass;
  import org.junit.Test;
  
  import org.apache.cassandra.SchemaLoader;
  import org.apache.cassandra.Util;
  import org.apache.cassandra.db.ColumnFamilyStore;
  import org.apache.cassandra.db.Keyspace;
  import org.apache.cassandra.db.RowUpdateBuilder;
  import org.apache.cassandra.exceptions.ConfigurationException;
  import org.apache.cassandra.schema.CompactionParams;
  import org.apache.cassandra.schema.KeyspaceParams;
  import org.apache.cassandra.utils.ByteBufferUtil;
  import org.apache.cassandra.utils.FBUtilities;
  
  import static org.junit.Assert.assertEquals;
  
  
  public class OneCompactionTest
  {
      public static final String KEYSPACE1 = "OneCompactionTest";
      private static final String CF_STANDARD1 = "Standard1";
      private static final String CF_STANDARD2 = "Standard2";
  
      @BeforeClass
      public static void defineSchema() throws ConfigurationException
      {
          SchemaLoader.prepareServer();
          SchemaLoader.createKeyspace(KEYSPACE1,
                                      KeyspaceParams.simple(1),
                                      SchemaLoader.standardCFMD(KEYSPACE1, CF_STANDARD1)
                                                  .compaction(CompactionParams.lcs(Collections.singletonMap("sstable_size_in_mb", "1"))),
                                      SchemaLoader.standardCFMD(KEYSPACE1, CF_STANDARD2));
      }
  
      private void testCompaction(String columnFamilyName, int insertsPerTable)
      {
          CompactionManager.instance.disableAutoCompaction();
  
          Keyspace keyspace = Keyspace.open(KEYSPACE1);
          ColumnFamilyStore store = keyspace.getColumnFamilyStore(columnFamilyName);
  
          Set<String> inserted = new HashSet<>();
          for (int j = 0; j < insertsPerTable; j++) {
              String key = String.valueOf(j);
                  new RowUpdateBuilder(store.metadata(), j, key)
                  .clustering("0")
                  .add("val", ByteBufferUtil.EMPTY_BYTE_BUFFER)
                  .build()
                  .applyUnsafe();
  
                  inserted.add(key);
              Util.flush(store);
              assertEquals(inserted.size(), Util.getAll(Util.cmd(store).build()).size());
          }
          FBUtilities.waitOnFuture(Util.compactAll(store, FBUtilities.nowInSeconds()));
          assertEquals(1, store.getLiveSSTables().size());
      }
  
      @Test
      public void testCompaction1()
      {
          testCompaction("Standard1", 1);
      }
  
      @Test
      public void testCompaction2()
      {
          testCompaction("Standard2", 2);
      }
  }
  