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   * "License"); you may not use this file except in compliance
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   *
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   * See the License for the specific language governing permissions and
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  package org.apache.cassandra.distributed.test;
  
  import org.junit.Test;
  
  import org.apache.cassandra.config.CassandraRelevantProperties;
  import org.apache.cassandra.distributed.Cluster;
  import org.apache.cassandra.distributed.api.ConsistencyLevel;
  import org.apache.cassandra.exceptions.InvalidRequestException;
  import org.apache.cassandra.utils.AssertionUtils;
  import org.assertj.core.api.Assertions;
  
  import static org.apache.cassandra.distributed.shared.AssertUtils.assertRows;
  import static org.apache.cassandra.distributed.shared.AssertUtils.row;
  
  public class CASAddTest extends TestBaseImpl
  {
      static
      {
          CassandraRelevantProperties.TCM_USE_ATOMIC_LONG_PROCESSOR.setBoolean(true);
      }
  
      @Test
      public void testAddition() throws Throwable
      {
          try (Cluster cluster = init(Cluster.create(3)))
          {
              cluster.schemaChange("CREATE TABLE " + KEYSPACE + ".tbl (pk int PRIMARY KEY, v int)");
  
              cluster.coordinator(1).execute("INSERT INTO " + KEYSPACE + ".tbl (pk, v) VALUES (1, 1) IF NOT EXISTS", ConsistencyLevel.QUORUM);
              assertRows(cluster.coordinator(1).execute("SELECT * FROM " + KEYSPACE + ".tbl WHERE pk = 1", ConsistencyLevel.SERIAL), row(1, 1));
              
              cluster.coordinator(1).execute("UPDATE " + KEYSPACE + ".tbl SET v = v + 1 WHERE pk = 1 IF v = 2", ConsistencyLevel.QUORUM);
              assertRows(cluster.coordinator(1).execute("SELECT * FROM " + KEYSPACE + ".tbl WHERE pk = 1", ConsistencyLevel.SERIAL), row(1, 1));
  
              cluster.coordinator(1).execute("UPDATE " + KEYSPACE + ".tbl SET v = v + 1 WHERE pk = 1 IF v = 1", ConsistencyLevel.QUORUM);
              assertRows(cluster.coordinator(1).execute("SELECT * FROM " + KEYSPACE + ".tbl WHERE pk = 1", ConsistencyLevel.SERIAL), row(1, 2));
          }
      }
  
      @Test
      public void testAdditionNotExists() throws Throwable
      {
          try (Cluster cluster = init(Cluster.create(3)))
          {
              cluster.schemaChange("CREATE TABLE " + KEYSPACE + ".tbl (pk int PRIMARY KEY, a int, b text)");
  
              // in this context partition/row not existing looks like column not existing, so to simplify the LWT required
              // condition, add a row with null columns so can rely on IF EXISTS
              cluster.coordinator(1).execute("INSERT INTO " + KEYSPACE + ".tbl (pk) VALUES (1)", ConsistencyLevel.QUORUM);
  
              // n = n + value where n = null
              cluster.coordinator(1).execute("UPDATE " + KEYSPACE + ".tbl SET a = a + 1, b = b + 'fail' WHERE pk = 1 IF EXISTS", ConsistencyLevel.QUORUM);
              // the SET should all no-op due to null... so should no-op
              assertRows(cluster.coordinator(1).execute("SELECT * FROM " + KEYSPACE + ".tbl WHERE pk = 1", ConsistencyLevel.SERIAL), row(1, null, null));
  
              // this section is testing current limitations... if they start to fail due to the limitations going away... update this test to include those cases
              Assertions.assertThatThrownBy(() -> cluster.coordinator(1).execute(unloggedBatch(
                        "INSERT INTO " + KEYSPACE + ".tbl (pk, a, b) VALUES (1, 0, '') IF NOT EXISTS",
                        "UPDATE " + KEYSPACE + ".tbl SET a = a + 1, b = b + 'success' WHERE pk = 1 IF EXISTS"
                        ), ConsistencyLevel.QUORUM))
                        .is(AssertionUtils.is(InvalidRequestException.class))
                        .hasMessage("Cannot mix IF EXISTS and IF NOT EXISTS conditions for the same row");
              Assertions.assertThatThrownBy(() -> cluster.coordinator(1).execute(unloggedBatch(
                        "INSERT INTO " + KEYSPACE + ".tbl (pk, a, b) VALUES (1, 0, '') IF NOT EXISTS",
  
                        "UPDATE " + KEYSPACE + ".tbl SET a = a + 1, b = b + 'success' WHERE pk = 1"
                        ), ConsistencyLevel.QUORUM))
                        .is(AssertionUtils.is(InvalidRequestException.class))
                        .hasMessage("Invalid operation (a = a + 1) for non counter column a");
  
              // since CAS doesn't allow the above cases, manually add the data to unblock...
              cluster.coordinator(1).execute("INSERT INTO " + KEYSPACE + ".tbl (pk, a, b) VALUES (1, 0, '')", ConsistencyLevel.QUORUM);
  
              // have cas add defaults when missing
              cluster.coordinator(1).execute("UPDATE " + KEYSPACE + ".tbl SET a = a + 1, b = b + 'success' WHERE pk = 1 IF EXISTS", ConsistencyLevel.QUORUM);
              assertRows(cluster.coordinator(1).execute("SELECT * FROM " + KEYSPACE + ".tbl WHERE pk = 1", ConsistencyLevel.SERIAL), row(1, 1, "success"));
          }
      }
  
      @Test
      public void testConcat() throws Throwable
      {
          try (Cluster cluster = init(Cluster.create(3)))
          {
              cluster.schemaChange("CREATE TABLE " + KEYSPACE + ".tbl (pk int PRIMARY KEY, v text)");
  
              cluster.coordinator(1).execute("INSERT INTO " + KEYSPACE + ".tbl (pk, v) VALUES (1, 'foo') IF NOT EXISTS", ConsistencyLevel.QUORUM);
              assertRows(cluster.coordinator(1).execute("SELECT * FROM " + KEYSPACE + ".tbl WHERE pk = 1", ConsistencyLevel.SERIAL), row(1, "foo"));
  
              cluster.coordinator(1).execute("UPDATE " + KEYSPACE + ".tbl SET v = v + 'bar' WHERE pk = 1 IF v = 'foobar'", ConsistencyLevel.QUORUM);
              assertRows(cluster.coordinator(1).execute("SELECT * FROM " + KEYSPACE + ".tbl WHERE pk = 1", ConsistencyLevel.SERIAL), row(1, "foo"));
  
              cluster.coordinator(1).execute("UPDATE " + KEYSPACE + ".tbl SET v = v + 'bar' WHERE pk = 1 IF v = 'foo'", ConsistencyLevel.QUORUM);
              assertRows(cluster.coordinator(1).execute("SELECT * FROM " + KEYSPACE + ".tbl WHERE pk = 1", ConsistencyLevel.SERIAL), row(1, "foobar"));
          }
      }
  
  }
  