Failures with karma-firefox

[famoroso]

Added require-css to a project where I was running karma unit tests with firefox, chrome and phantomjs. Firefox unit tests stopped working but everything else seemed fine including loading a standard deployment of my project in firefox. Dug in with a debugger and figured out the problem.

Seems that in karma-firefox the load event does not fire as expected. So even though the css is actually loading, the tests eventually end in a timeout error. Forcing useOnload to false fixed the problem.

Is there a smarter way to set that flag?

[guybedford]

Thanks for reporting - specifically is this Karma-Firefox or Firefox in general?

[famoroso]

Seems to be only Karma-Firefox. Firefox loads everything up just fine outside of the unit test environment.

[guybedford]

Ok right. That's really strange it's specific to that scenario, as it's still just Firefox right? Any ideas why it might be happening would be great to hear. Do you think it makes sense to add an environment detection for this to switch into onLoad? I just worry it's not solving the issue though.

[famoroso]

I only debugged as far as finding out about the onLoad. It's entirely possible that fixing Karma-Firefox or karma itself is a much better solution. I did post this on karma-firefox's github but haven't gotten a reply yet. I think if there's an easy way to detect that we are running karma unit tests then it's worth adding. Otherwise it's easy to patch for those who care.