| CONSOLE ERROR: line 21: WebSocket connection to 'ws://localhost:8880/handshake-fail-by-no-upgrade-header' failed: Error during WebSocket handshake: 'Upgrade' header is missing | |
| Test that WebSocket handshake fails if Upgrade header field isn't reflected by the server. | |
| On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". | |
| PASS onerror() was called | |
| PASS successfullyParsed is true | |
| TEST COMPLETE | |