ApaiIO\Operations\Search::setCategory PHP Метод

    public function setCategory($category)
    {
        $this->parameters['SearchIndex'] = $category;
        return $this;
    }

 public function testRestErrorRequest()
 {
     $search = new Search();
     $search->setCategory('DVD')->setPage(2);
     $res = $this->runOperation($search);
     $this->assertEquals("False", $res->Items->Request->IsValid);
 }