public function testMoreLikeThisApi() {
$client = new Elastica_Client(array('persistent' => false));
$index = $client->getIndex('elastica_test');
$index->create(array('index' => array('number_of_shards' => 1, 'number_of_replicas' => 0)), true);
$type = new Elastica_Type($index, 'mlt_test');
$type->addDocument(new Elastica_Document(1, array('visible' => true, 'name' => 'bruce wayne batman')));
$type->addDocument(new Elastica_Document(2, array('visible' => true, 'name' => 'bruce wayne')));
$type->addDocument(new Elastica_Document(3, array('visible' => false, 'name' => 'bruce wayne')));
$type->addDocument(new Elastica_Document(4, array('visible' => true, 'name' => 'batman')));
$type->addDocument(new Elastica_Document(5, array('visible' => false, 'name' => 'batman')));
$type->addDocument(new Elastica_Document(6, array('visible' => true, 'name' => 'superman')));
$type->addDocument(new Elastica_Document(7, array('visible' => true, 'name' => 'spiderman')));
$index->refresh();
$document = $type->getDocument(1);
// Return all similar
$resultSet = $type->moreLikeThis($document, array('min_term_freq' => '1', 'min_doc_freq' => '1'));
$this->assertEquals(4, $resultSet->count());
// Return just the visible similar
$query = new Elastica_Query();
$filterTerm = new Elastica_Filter_Term();
$filterTerm->setTerm('visible', true);
$query->setFilter($filterTerm);
$resultSet = $type->moreLikeThis($document, array('min_term_freq' => '1', 'min_doc_freq' => '1'), $query);
$this->assertEquals(2, $resultSet->count());
}