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   * 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.
   */
  
  package org.apache.cassandra.distributed.upgrade;
  
  import org.junit.Test;
  
  import org.apache.cassandra.distributed.api.ConsistencyLevel;
  
  import static org.apache.cassandra.distributed.shared.AssertUtils.assertRows;
  import static org.apache.cassandra.distributed.shared.AssertUtils.row;
  
  /**
   * Test read repair after partial writes when the cluster nodes are on different versions.
   *
   * This test and {@link MixedModeReadRepairDeleteTest} are separated to avoid OOM errors in CI (see CASSANDRA-16237).
   */
  public class MixedModeReadRepairWriteTest extends UpgradeTestBase
  {
      /**
       * Test that queries repair rows that have been inserted in one replica only.
       * The insertion can be either in the upgraded or in the not-upgraded node.
       */
      @Test
      public void mixedModeReadRepairInsert() throws Throwable
      {
          // rows for columns (k, c, v)
          Object[] row1 = row(0, 1, 10);
          Object[] row2 = row(0, 2, 20);
  
          allUpgrades(2, 1)
          .setup(c -> c.schemaChange(withKeyspace("CREATE TABLE %s.t (k int, c int, v int, PRIMARY KEY (k, c))")))
          .runBeforeClusterUpgrade(cluster -> cluster.coordinator(1).execute(withKeyspace("TRUNCATE %s.t"), ConsistencyLevel.ALL))
          .runAfterClusterUpgrade(cluster -> {
  
              // insert rows internally in each node
              String insert = withKeyspace("INSERT INTO %s.t (k, c, v) VALUES (?, ?, ?)");
              cluster.get(1).executeInternal(insert, row1);
              cluster.get(2).executeInternal(insert, row2);
  
              // query to trigger read repair
              String query = withKeyspace("SELECT * FROM %s.t");
              assertRows(cluster.get(1).executeInternal(query), row1);
              assertRows(cluster.get(2).executeInternal(query), row2);
              assertRows(cluster.coordinator(2).execute(query, ConsistencyLevel.ALL), row1, row2);
              assertRows(cluster.get(1).executeInternal(query), row1, row2);
              assertRows(cluster.get(2).executeInternal(query), row1, row2);
          })
          .run();
      }
  
      /**
       * Test that queries repair rows that exist in both replicas but have been updated only in one replica.
       * The update can be either in the upgraded or in the not-upgraded node.
       */
      @Test
      public void mixedModeReadRepairUpdate() throws Throwable
      {
          // rows for columns (k, c, v)
          Object[] row1 = row(0, 1, 10);
          Object[] row2 = row(0, 2, 20);
  
          allUpgrades(2, 1)
          .setup(cluster -> {
              cluster.schemaChange(withKeyspace("CREATE TABLE %s.t (k int, c int, v int, PRIMARY KEY (k, c))"));
          })
          .runBeforeClusterUpgrade(cluster -> {
              // insert the initial version of the rows in all the nodes
              String insert = withKeyspace("INSERT INTO %s.t (k, c, v) VALUES (?, ?, ?)");
              cluster.coordinator(1).execute(insert, ConsistencyLevel.ALL, row1);
              cluster.coordinator(2).execute(insert, ConsistencyLevel.ALL, row2);
          })
          .runAfterClusterUpgrade(cluster -> {
  
              // internally update one row per replica
              String update = withKeyspace("UPDATE %s.t SET v=? WHERE k=? AND c=?");
              cluster.get(1).executeInternal(update, 11, 0, 1);
              cluster.get(2).executeInternal(update, 22, 0, 2);
  
              // query to trigger read repair
              String query = withKeyspace("SELECT * FROM %s.t");
              assertRows(cluster.get(1).executeInternal(query), row(0, 1, 11), row2);
              assertRows(cluster.get(2).executeInternal(query), row1, row(0, 2, 22));
              assertRows(cluster.coordinator(2).execute(query, ConsistencyLevel.ALL), row(0, 1, 11), row(0, 2, 22));
              assertRows(cluster.get(1).executeInternal(query), row(0, 1, 11), row(0, 2, 22));
              assertRows(cluster.get(2).executeInternal(query), row(0, 1, 11), row(0, 2, 22));
          })
          .run();
      }
  }
  