abrom
commented
1 month ago no worries @leoc. There are a few options:
If the error is a request failure, you can enable the raise_on_request_failure option (see the README for details).
If it is an unhandled JS error, puppeteer does support capturing those with an event handler: https://pptr.dev/api/puppeteer.pageevent Although it isn't currently supported, it seems like it would be pretty straight forward to add something to puppeteer to raise an error (with the list of JS errors attached) if any have occurred whilst trying to render the page.
Alternatively, you could have your application "flag" a successful render somewhere in the global scope, then have Grover wait until that holds true. It wouldn't tell you what the error was, but it would timeout the render request thus at least tell you that something went wrong. eg:
... render your page ...
window.renderSuccessful = true;
....then in grover options add something like:
wait_for_function: 'window.renderSuccessful === true'Alternatively #2, you could add a window.onerror event handler to capture the errors, where you could assign them to a global object then use the execute_script Grover option to extract them out:
window.pageErrors = [];
window.onerror = (message) => window.pageErrors.push(message);
...then in grover:
execute_script: "if (window.pageErrors.length > 0) throw `Errors occurred! ${JSON.stringify(window.pageErrors)}`"or similar.
Note, I haven't tested these, but they should work 😄
Although, if your issue is that your instance wasn't able to connect to Browserless, then that should have raised errors when trying to launch the browser?!
Anyway, hopefully the above will give you something to go on
leoc
Ok, hope this does not come over as too negative. I love this gem and all it provides. Thanks a lot!
Just want to share my situation of today:
console.errorHow can I grab this console output and maybe let me know in test, or when debugging in dev?
My ideal situation would be to
assertin test, that the rendering of the PDF did not cause any JS errors. And if there are errors, I would like to see them in the test failure output.Browserless did not connect correctly. I only found out about the JS errors, because I tediously extracted the Rails app from Docker and run it locally. This should not have been necessary.
Did I miss something?
Anyway, heres a dog with pizza.