public function testGetQuery_SearchInAllFields()
 {
     $document = new \SolrInputDocument();
     $document->addField('id', '1');
     $document->addField('document_name_s', 'validtestentity');
     $expectedQuery = 'id:1';
     $query = new FindByIdentifierQuery($document);
     $filterQueries = $query->getSolrQuery()->getFilterQueries();
     $queryString = $query->getQueryString();
     $this->assertEquals($expectedQuery, $queryString);
     $this->assertEquals(1, count($filterQueries));
     $actualFilterQuery = array_pop($filterQueries);
     $this->assertEquals('document_name_s:validtestentity', $actualFilterQuery);
 }