WebSocket connection does not respect the throw option

[na--]

k6 version

all

OS

all

Docker version and image

No response

Expected Behaviour

With this code:

import ws from 'k6/ws';

export let options = {
    throw: false,
};

export default function () {
    try {
        const resp = ws.connect('wss://test-api.k6.io/whatever-non-ws-url', null, function (socket) {
            socket.on('open', function () {
                console.log('connected');
                socket.close();
            });

            socket.on('error', function (e) {
                console.error('connection error occurred: ', e.error());
            });

            socket.on('close', function () {
                console.log('disconnected');
            });
        });
        console.log(`ended normally, response: \n${JSON.stringify(resp, null, 4)}`);
    }
    catch (e) {
        console.error(`ended with exception, error: ${e}`);
    }
}

I expect the ws.connect() call to return normally and emit a warning log message, and the Response to contain an appropriate error and error code. This is what happens with HTTP requests (which the websocket starts with) when throw is false.

Related issue: #2024

Actual Behaviour

An exception will be thrown and ended with exception, error: websocket: bad handshake logged.

Steps to Reproduce the Problem

Run the code above.

[na--]

This was fixed by #2616