/** * Retrieves an SQL driver instance. * * @return object Initialized Turba_Driver_sql:: instance connected to the * test database. */ function getDriver() { if (is_null($this->_driver)) { $this->_driver = Turba_Driver::factory('_test_sql', $this->getDriverConfig()); $this->assertOk($this->_driver); $this->assertOk($this->_driver->_init()); } return $this->_driver; }