| This is a testharness.js-based test. | |
| PASS postMessaging to a same-origin iframe via MessageChannel allows them to see each others' modifications | |
| PASS postMessaging to a same-site iframe via MessageChannel should fail | |
| PASS postMessaging to a cross-site iframe via MessageChannel should fail | |
| FAIL postMessaging with a MessageChannel that's been cross-site should succeed assert_true: expected true got false | |
| Harness: the test ran to completion. | |