public function test_adding_new_metadata()
{
$mao = $this->registry->getMAO("product");
$id = MetadataId::generate();
$mao->save(new Metadata($id, "product", ["sku" => "DUMPLIE_SKU_1", "name" => "Super Product"]));
$this->assertTrue($this->storage->has("inventory", "product", (string) $id));
$metadata = $mao->findBy(["sku" => "DUMPLIE_SKU_1"]);
$this->assertEquals($id, $metadata->id());
$this->assertEquals("DUMPLIE_SKU_1", $metadata->sku);
$this->assertEquals("Super Product", $metadata->name);
}