public function test_updating_metadata()
{
$mao = $this->registry->getMAO("test");
$id = MetadataId::generate();
$mao->save(new Metadata($id, "test", []));
$metadata = $mao->getBy(['id' => (string) $id]);
$metadata->without_default = [1, "foo" => [2, "bar"]];
$mao->save($metadata);
$metadata = $mao->getBy(['id' => (string) $id]);
$this->assertSame([1, "foo" => [2, "bar"]], $metadata->without_default);
}