Verifies that a helpful console message is emitted on websocket failure.
WebSocket failure console message:
WebSocket connection to 'ws://localhost:8000/' failed: Error during WebSocket handshake: Unexpected response code: 200
Verifies that a helpful console message is emitted on websocket failure.
WebSocket failure console message:
WebSocket connection to 'ws://localhost:8000/' failed: Error during WebSocket handshake: Unexpected response code: 200