This test checks the various use cases around sending multiple ports through WorkerGlobalScope.postMessage

On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".

PASS successfullyParsed is true

TEST COMPLETE

PASS event.ports is non-null and zero length when no port sent
PASS event.ports is non-null and zero length when empty array sent
PASS event.ports contains two ports when two ports sent
PASS posting a null port did throw: TypeError: Failed to execute 'postMessage' on 'DedicatedWorkerGlobalScope': Failed to convert value to 'object'.
PASS posting a non-port did throw: TypeError: Failed to execute 'postMessage' on 'DedicatedWorkerGlobalScope': Value at index 1 does not have a transferable type.
PASS event.ports contains two ports when two ports re-sent after error
PASS posting a non-sequence did throw: TypeError: Failed to execute 'postMessage' on 'DedicatedWorkerGlobalScope': Value at index 0 does not have a transferable type.

TEST COMPLETE