Elastica\Query\QueryString::setDefaultField PHP Метод

    public function setDefaultField($field)
    {
        return $this->setParam('default_field', $field);
    }

 public function testSetDefaultField()
 {
     $default = 'field1';
     $query = new QueryString('test');
     $query->setDefaultField($default);
     $data = $query->toArray();
     $this->assertEquals($data['query_string']['default_field'], $default);
 }