| Test WebSocket.extensions attribute. | |
| On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". | |
| Check the value before opening the connection: | |
| PASS ws.extensions is "" | |
| Check if the value is read only: | |
| PASS ws.extensions = 'foo'; ws.extensions is "" | |
| Check the value after the connection is established: | |
| FAIL ws.extensions should be x-webkit-deflate-frame. Was permessage-deflate. | |
| PASS successfullyParsed is true | |
| TEST COMPLETE | |