Tests that BroadcastChannel is partioning based on top origin / frame origin.

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


PASS Received message from same-origin popup
PASS gotMessageFromSameOriginPopup is false
PASS Received message from same-origin iframe under same-origin popup
PASS gotMessageFromSameOriginIframeUnderSameOriginPopup is false
PASS successfullyParsed is true

TEST COMPLETE