| PASS postMessage results in correct event | |
| PASS messages are delivered in port creation order | |
| PASS messages aren't delivered to a closed port | |
| PASS messages aren't delivered to a port closed after calling postMessage. | |
| PASS closing and creating channels during message delivery works correctly | |
| PASS Closing a channel in onmessage prevents already queued tasks from firing onmessage events | |