public function testMergeLimit()
 {
     $this->queryBuilder->limit(20)->offset(10);
     $qb = new SelectQueryBuilder();
     $qb->limit(50)->offset(0);
     $this->queryBuilder->mergeLimit($qb);
     $this->assertEquals(50, $this->queryBuilder->getLimit());
     $this->assertEquals(0, $this->queryBuilder->getOffset());
 }