public function test_compound_command_serialization()
{
$compoundCommand = new AddToCart("SKU_1", 5, (string) CartId::generate());
$serialized = serialize($compoundCommand);
$unserialized = unserialize($serialized);
$this->assertEquals("SKU_1", $unserialized->sku());
$this->assertEquals(5, $unserialized->quantity());
}