Sokil\Mongo\DocumentTest::testSetStructure_StoredDocument PHP Method

    public function testSetStructure_StoredDocument()
    {
        $document = $this->collection->createDocument(array('some' => 'field'))->save();
        $obj = new Structure();
        $obj->param = 'value';
        // save
        $document->set('d', $obj)->save();
        $this->assertEquals(array('param' => 'value'), $document->d);
        $this->assertEquals(array('param' => 'value'), $this->collection->getDocumentDirectly($document->getId())->d);
    }