Drush in Nightwatch tests can't detect the Simpletest site path

Here https://git.drupalcode.org/project/drupal/-/blob/3465f9c17f916f54dc64b08... is the place in Drupal Core where it tries to detect the simpletest environment.

It seems that drupalInstall sets that variable here https://git.drupalcode.org/project/drupal/-/blob/11.x/core/tests/Drupal/...

Not sure why it's not detected.

It seems that drupalInstall sets that variable here https://git.drupalcode.org/project/drupal/-/blob/11.x/core/tests/Drupal/...

Not sure why it's not detected.

It sets the cookie, not the env variable:

    this.url(process.env.DRUPAL_TEST_BASE_URL).setCookie({
      name: 'SIMPLETEST_USER_AGENT',
      // Colons need to be URL encoded to be valid.
      value: encodeURIComponent(installData.user_agent),
      path: url.pathname,
    });

And even it it will set the env variable, it will be per-process and disappear after the process ends, I afraid.

Created an issue in Drupal Core to fix this: 🐛 Nightwatch command drupalInstall doesn't set the user_agent environment variable with the simpletest site instance Active - waiting for a fix there.

Thanks so much for the core issue and MR. Hopefully it's a quick one and it will go through, but if it takes longer we can always set the env variable for the nightwatch job in this part of the code: https://git.drupalcode.org/project/gitlab_templates/-/blob/main/includes...

I'd rather have that fixed in core, so leaving as postponed and the above would be a plan B.

This is now merged in core. We will need to check if the issue still happens here.