public function testOnDocumentWithExtraMetadatas()
{
$document = $this->createDocument('extra-metadatas.md');
$event = new CarewEvent($document);
$extraction = new Extraction();
$extraction->onDocument($event);
$metadatas = $document->getMetadatas();
$this->assertSame('v1', $metadatas['k1']);
$this->assertSame(array('v2.1', 'v2.2'), $metadatas['k2']);
}