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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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   * See the License for the specific language governing permissions and
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  package org.apache.cassandra.db.virtual;
  
  import java.time.Instant;
  import java.util.Date;
  import java.util.List;
  
  import org.junit.Test;
  
  import ch.qos.logback.classic.spi.LoggingEvent;
  import com.datastax.driver.core.Row;
  
  import static org.apache.cassandra.config.CassandraRelevantProperties.LOGS_VIRTUAL_TABLE_MAX_ROWS;
  import static org.apache.cassandra.db.virtual.LogMessagesTable.LOGS_VIRTUAL_TABLE_DEFAULT_ROWS;
  import static org.junit.Assert.assertEquals;
  
  public class LogMessagesTableTest extends AbstractLoggerVirtualTableTest<LoggingEvent>
  {
      @Test
      public void testMultipleLogsInSameMillisecond()
      {
          registerTable();
          List<LoggingEvent> loggingEvents = getLoggingEvents(10, Instant.now(), 5);
          loggingEvents.forEach(table::add);
  
          // 2 partitions, 5 rows in each
          assertEquals(2, numberOfPartitions());
      }
  
      @Test
      public void testLimitedCapacity()
      {
          registerTable(100);
  
          int numberOfRows = 1000;
          List<LoggingEvent> loggingEvents = getLoggingEvents(numberOfRows);
          loggingEvents.forEach(table::add);
  
          // even we inserted 1000 rows, only 100 are present as its capacity is bounded
          assertEquals(100, numberOfPartitions());
  
          // the first record in the table will be the last one which we inserted
          LoggingEvent firstEvent = loggingEvents.get(999);
          assertRowsNet(executeNet(query("select timestamp from %s limit 1")),
                        new Object[]{ new Date(firstEvent.getTimeStamp()) });
  
          // the last record in the table will be 900th we inserted
          List<Row> all = executeNet(query("select timestamp from %s")).all();
          assertEquals(100, all.size());
          Row row = all.get(all.size() - 1);
          Date timestamp = row.getTimestamp(0);
          assertEquals(loggingEvents.get(900).getTimeStamp(), timestamp.getTime());
      }
  
      @Test
      public void testResolvingBufferSize()
      {
          LOGS_VIRTUAL_TABLE_MAX_ROWS.setInt(-1);
          assertEquals(LOGS_VIRTUAL_TABLE_DEFAULT_ROWS, resolveBufferSize());
  
          LOGS_VIRTUAL_TABLE_MAX_ROWS.setInt(0);
          assertEquals(LOGS_VIRTUAL_TABLE_DEFAULT_ROWS, resolveBufferSize());
  
          LOGS_VIRTUAL_TABLE_MAX_ROWS.setInt(1000001);
          assertEquals(LOGS_VIRTUAL_TABLE_DEFAULT_ROWS, resolveBufferSize());
  
          LOGS_VIRTUAL_TABLE_MAX_ROWS.setInt(999);
          assertEquals(999, resolveBufferSize());
  
          LOGS_VIRTUAL_TABLE_MAX_ROWS.setInt(50001);
          assertEquals(50001, resolveBufferSize());
      }
  
      private int resolveBufferSize()
      {
          return AbstractLoggerVirtualTable.resolveBufferSize(LOGS_VIRTUAL_TABLE_MAX_ROWS.getInt(),
                                                              LogMessagesTable.LOGS_VIRTUAL_TABLE_MAX_ROWS,
                                                              LOGS_VIRTUAL_TABLE_DEFAULT_ROWS);
      }
  
      @Override
      protected void registerTable(int maxSize)
      {
          registerVirtualTable(new LogMessagesTable(keyspace, maxSize));
      }
  
      @Override
      protected void registerTable()
      {
          registerTable(1000);
      }
  
      @Override
      protected String getMessage(long timestamp)
      {
          return "message " + timestamp;
      }
  }
  