`browser.isConnected` doesn't seem to detect when the browser process is no longer running

[ankur22]

Tested against: dbede12

The browser.isConnected function doesn't seem to fully work as expected -- it doesn't correctly detect that there is no browser process running and therefore no valid CDP connection. Here's the test script I ran. When the test goes to sleep for 20seconds, that's when I force quit the browser process:

import launcher from 'k6/x/browser';
import { check, sleep } from 'k6';

export default function() {
  const browser = launcher.launch('chromium', {
    headless: false,
  });

  check(browser, {
    'should be connected after launch': browser.isConnected(),
  });

  const page = browser.newPage();
  const res = page.goto('https://google.com');

  sleep(20); // Force quit the browser process now

  check(browser, {
    'should be connected before ending iteration': browser.isConnected(),
  });

  // Disconnect from the browser instance.
  browser.close();
}

I was expecting the final 'should be connected before ending iteration' to fail since the browser process was killed and therefore there shouldn't be a valid connection still open.

Please remember to update the k6-docs and remove reference to this issue (look for <BWIPT id="453"/> and xk6-browser/issues/453).

[inancgumus]

Have you tried it without a promise (without Browser.on)? If you haven't, we might so we can see if it's the on method or the isConnected method.

[ankur22]

Have you tried it without a promise (without Browser.on)? If you haven't, we might so we can see if it's the on method or the isConnected method.

Good point. I've tested it without calling browser.on and it still exhibits the incorrect behaviour. I will update the script above to avoid any confusion.

[inancgumus]

@ankur22 Is this still relevant since we manage the browser processes?

[ankur22]

Good point, let's close this 🎉