Harness status: OK

Found 6 tests

6 Pass
Pass	Constructed `MessageEvent` objects have no real origins.
Pass	Origin.from(MessageEvent) returns a tuple origin for messages from same-origin frames.
Pass	Origin.from(MessageEvent) returns a tuple origin for messages from cross-origin frames.
Pass	Origin.from(MessageEvent) returns an opaque origin for messages from sandboxed frames.
Pass	Origin.from(MessageEvent) returns a tuple origin for same-origin windows.
Pass	Origin.from(MessageEvent) returns a tuple origin for cross-origin windows.