public function testJoinDereferenced()
{
$this->assertEquals('{!join from=$deref_1 to=$deref_2}', $this->_helper->join('manu_id', 'id', true));
$this->assertEquals(array('deref_1' => 'manu_id', 'deref_2' => 'id'), $this->_query->getParams());
}