Sokil\Mongo\DocumentTest::testAddToSet_ScalarKey PHP Method

    public function testAddToSet_ScalarKey()
    {
        // create document
        $doc = $this->collection->createDocument(array('param' => 41));
        $doc->save();
        $docId = $doc->getId();
        // befire save
        $doc->addToSet('param', 42);
        $this->assertEquals(array(41, 42), $doc->param);
        // after save
        $doc->save();
        $doc = $this->collection->getDocumentDirectly($docId);
        $this->assertEquals(array(41, 42), $doc->param);
    }