Test that MessagePort messages are delivered even if both ports are in transit (cloned).
Should say PASS twice.
PASS: Received message to cloned port.
PASS: Received message from cloned port.
Test that MessagePort messages are delivered even if both ports are in transit (cloned).
Should say PASS twice.
PASS: Received message to cloned port.
PASS: Received message from cloned port.