PHPUnit and MySQL truncation error

Question

I am getting a headache with PHPUnit\'s behavior of always running TRUNCATE prior to inserting fixtures without first setting foreign key checks off:

Answer 1

Alternatively, you could simulate truncation with a combination of deleting all records and then re-setting the auto-increment counter.

First, you would have to create new database operation class that will handle resetting the table's auto-increment value.

/**
 * Resets all AUTO_INCREMENT counters on all tables in a dataset.
 * @see PHPUnit_Extensions_Database_Operation_IDatabaseOperation
 */
class ResetAutoincrementOperation implements PHPUnit_Extensions_Database_Operation_IDatabaseOperation
{

    /* 
     * @see PHPUnit_Extensions_Database_Operation_IDatabaseOperation::execute()
     */
    public function execute(PHPUnit_Extensions_Database_DB_IDatabaseConnection $connection, 
            PHPUnit_Extensions_Database_DataSet_IDataSet $dataSet)
    {
        foreach ($dataSet->getReverseIterator() as $table) {
            $query = "ALTER TABLE {$connection->quoteSchemaObject($table->getTableMetaData()->getTableName())}"
                . " AUTO_INCREMENT = 1
            ";

            try {
                $connection->getConnection()->query($query);
            } catch (PDOException $e) {
                throw new PHPUnit_Extensions_Database_Operation_Exception('RESET_AUTOINCREMENT', 
                        $query, array(), $table, $e->getMessage());
            }
        }
    }
}

now overwrite the getSetUpOperation()and getTearDownOperation() methods as described above.

class FooTest extends PHPUnit_Extensions_Database_TestCase
{
    /**
     * @see PHPUnit_Extensions_Database_TestCase::getTearDownOperation()
     */
    protected function getTearDownOperation ()
    {
        // Clean up after ourselves
        return new PHPUnit_Extensions_Database_Operation_Composite(array(
            PHPUnit_Extensions_Database_Operation_Factory::DELETE_ALL(), // 1. delete all records from table
            new ResetAutoincrementOperation() // 2. reset auto increment value
        ));
    }

    /**
     * @see PHPUnit_Extensions_Database_TestCase::getSetUpOperation ()
     */
    protected function getSetUpOperation ()
    {
        return new PHPUnit_Extensions_Database_Operation_Composite(array(
                PHPUnit_Extensions_Database_Operation_Factory::DELETE_ALL(), // 1. delete all records from table
                new ResetAutoincrementOperation(), // 2. reset auto increment value
                PHPUnit_Extensions_Database_Operation_Factory::INSERT() // 3. insert new records
        ));
    }
}

Worked for me with MySQL 5.5.24 and PHPUnit 3.6.10