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Figured out the problem was because I had two applications.js files. One in app/assets/javascripts/ and another in app/javascript. Sprockets was serving my asset version of application.js due to my manifest pointing there. I adjusted the manifest and deleted the secondary application.js and all is working.

I think you've found a bug in twilio-ruby! Recently there was an update to the gem changing some behaviour in a rack middleware that is part of the gem. It lead to the gem requiring some behaviour from Rack, but in a situation where Rack isn't loaded, like your code above, this fails because Rack isn't a dependency.

I've just made a PR to fix this. To fix this in the meantime, you can downgrade the version of twilio-ruby to 5.63.0, before the previous change was merged, or you can install rack as a dependency.

The library is released every two weeks and the last release was February 24th. So if this fix is approved quickly, it could make it into this release.

Your main issue here is out-of-order execution. You're visiting the page before creating the objects needing for your test, therefore the objects aren't visible on the rendered page (they didn't exist when the page was rendered). For most tests you won't want to be calling visit in a before block, unless you have a series of test that all require the same test data, and visiting the same page. In this case just move the visit into the scenario. Additionally, don't over-specify the selectors for the elements you're looking for because it will make your tests brittle. You don't show what your html looks like, but assuming this page is only showing one list of articles then checking for just one of your classes may be enough, or scoping your expectation to a page area, and then using a more general CSS selector

It seems to me that you forgot to add all the modules of this class. Try to update the spec/controllers/api/v1/categories_controller_spec.rb too:

First of all, the message about DidYouMean is a deprecation warning not an error, it doesn't break your app. It means that usage of DidYouMean::SPELL_CHECKERS is deprecated and will be removed in a future version of ruby. In this case in Ruby 3.3. You shouldn't worry about it until you use versions that are lower than 3.3. It's not your code that triggers the warning. It comes from a gem named Thor. The issue was solved in thor version 1.2.0. You can update the gem by calling bundle update thor.

The actual error comes from the bootsnap gem:

The key to resolving this was in a component of the error message

To fixed this issue I have removed this line

SimpleCov generates a bunch of files apart from the index.html, I guess there are some styles as well, so probably you can try adding to the gitlab artifacts the folder instead of only adding the index.html

Thanks to a comment, and this answer: https://stackoverflow.com/a/67108740/147356

This works:

replace: