public function testConcatWs($dql, $sql)
{
$query = $this->em->createQuery(sprintf("SELECT CONCAT_WS(%s) FROM %s as e", $dql, self::FAKE_ENTITY));
$this->assertEquals(sprintf("SELECT CONCAT_WS(%s) AS sclr_0 FROM some_fake s0_", $sql), $query->getSQL());
}