public function testPrepare()
{
$stmp = $this->_db->prepare('SELECT * FROM users WHERE id=?');
$this->assertEquals(get_class($stmp), 'Zend_Db_Statement_Pdo');
}
/**
* Get shard conncetion by value
*
* @param string $value
* @return Zend_Db_Adapter_Abstract
*/
public function getShard($value)
{
return $this->_db->getShard($this->getShardName($value));
}