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  package org.apache.cassandra.index.sai.functional;
  
  import org.junit.Test;
  
  import com.datastax.driver.core.ResultSet;
  import org.apache.cassandra.db.marshal.Int32Type;
  import org.apache.cassandra.index.sai.SAITester;
  import org.apache.cassandra.index.sai.utils.IndexIdentifier;
  import org.apache.cassandra.index.sai.disk.v1.bbtree.NumericIndexWriter;
  import org.apache.cassandra.index.sai.utils.IndexTermType;
  
  import static org.junit.Assert.assertEquals;
  
  public class FlushingTest extends SAITester
  {
      @Test
      public void testFlushingLargeStaleMemtableIndex()
      {
          createTable(CREATE_TABLE_TEMPLATE);
          createIndex(String.format(CREATE_INDEX_TEMPLATE, "v1"));
  
          int overwrites = NumericIndexWriter.MAX_POINTS_IN_LEAF_NODE + 1;
          for (int j = 0; j < overwrites; j++)
          {
              execute("INSERT INTO %s (id1, v1) VALUES ('1', ?)", j);
          }
  
          flush();
  
          ResultSet rows = executeNet("SELECT id1 FROM %s WHERE v1>=0");
          assertEquals(1, rows.all().size());
      }
  
      @Test
      public void testFlushingOverwriteDelete()
      {
          createTable(CREATE_TABLE_TEMPLATE);
          IndexIdentifier indexIdentifier = createIndexIdentifier(createIndex(String.format(CREATE_INDEX_TEMPLATE, "v1")));
          IndexTermType indexTermType = createIndexTermType(Int32Type.instance);
  
          int sstables = 3;
          for (int j = 0; j < sstables; j++)
          {
              execute("INSERT INTO %s (id1, v1) VALUES (?, 1)", Integer.toString(j));
              execute("DELETE FROM %s WHERE id1 = ?", Integer.toString(j));
              flush();
          }
  
          ResultSet rows = executeNet("SELECT id1 FROM %s WHERE v1 >= 0");
          assertEquals(0, rows.all().size());
          verifyIndexFiles(indexTermType, indexIdentifier, sstables, 0, sstables);
          verifySSTableIndexes(indexIdentifier, sstables, 0);
  
          compact();
          waitForAssert(() -> verifyIndexFiles(indexTermType, indexIdentifier, 1, 0, 1));
  
          rows = executeNet("SELECT id1 FROM %s WHERE v1 >= 0");
          assertEquals(0, rows.all().size());
          verifySSTableIndexes(indexIdentifier, 1, 0);
      }
  }
  