[Feature Request]: Stop execution when Javascript error encountered

[uykusuz]

Feature Description

If I write something like the following and run it:

export default function() { hurz }

k6 will write an error to the console like the following:
ERRO[0000] ReferenceError: hurz is not defined

But will exit normally and print out the usual statistics.

I couldn't find a way to tell k6 to exit abnormally if it encounters an error like this. Is there a way to tell k6 to do this?

Suggested Solution (optional)

Add a configuration option to make k6 exit non-zero if it encounters Javascript errors during execution.

[na--]

Thanks for creating this issue! We've considered something like this before, though mostly intended for non-syntax script errors (e.g. trying to use the body of a response for a failed request without checking it), see #877. From what I understand, you'd like k6 to exit on the first such script error it sees, right?

As a workaround right now, you can add a custom Counter metric, surround your code with a try {} catch() {} block and increment the counter in the catch. Then, if you have a threshold on the new metric with abortOnFail, k6 will abort the test script after you increment the counter. Though not immediately, k6 evaluates thresholds every 2 seconds.

Soon, when we merge #2093 (either in the upcoming k6 v0.35.0 or v0.36.0), we'll have a way to immediately abort the whole script, so there won't be a need for the threshold (you'd still need the try/catch block though)...

[uykusuz]

thanks for the fast response! That works.