assertRowAbsent example

// A transaction after a DDL statement should still work the same.     $this->cleanUp();
    $transaction = $this->connection->startTransaction();
    $transaction2 = $this->connection->startTransaction();
    $this->executeDDLStatement();
    unset($transaction2);
    $transaction3 = $this->connection->startTransaction();
    $this->insertRow('row');
    $transaction3->rollBack();
    unset($transaction3);
    unset($transaction);
    $this->assertRowAbsent('row');

    // The behavior of a rollback depends on the type of database server.     if ($this->connection->supportsTransactionalDDL()) {
      // For database servers that support transactional DDL, a rollback       // of a transaction including DDL statements should be possible.       $this->cleanUp();
      $transaction = $this->connection->startTransaction();
      $this->insertRow('row');
      $this->executeDDLStatement();
      $transaction->rollBack();
      unset($transaction);