public function testThrowExceptionIfAliasDoesNotExist()
 {
     $query = new Doctrine_RawSql();
     $query->parseDqlQueryPart("select", "{test.test}");
     try {
         $query->getSqlQuery();
         $this->fail("Should throw exception");
     } catch (Doctrine_RawSql_Exception $exception) {
         $this->assertEqual($exception->getMessage(), "The associated component for table alias test couldn't be found.");
     }
 }