ReferenceError: cov_1hphpf4qcw is not defined

[frantallukas10]

I have problem create test for my function

here is my project https://github.com/frantallukas10/youtu-get
I try to create test for my function where I use puppeteer for get every title and id from youtube playlist
here is my test: https://github.com/frantallukas10/youtu-get/blob/master/tests/test.js
and here is my function: https://github.com/frantallukas10/youtu-get/blob/master/src/main.js

thank you for your help or information... =)

[kblok]

Can you point us to the evaluate call that is failing?

[frantallukas10]

Can you point us to the evaluate call that is failing?

when I run my function everything work properly. My result is correct. but If I try to test my function I have the issue

[kblok]

Your code coverage tool is injecting code

console.log node_modules/puppeteer/lib/ExecutionContext.js:108
    () => {
          /* istanbul ignore next */
          cov_npcpcae6x.f[2]++;
          cov_npcpcae6x.s[19]++;
          window.scrollTo(0, document.getElementsByTagName('ytd-app')[0].getBoundingClientRect().height);
        }
    //# sourceURL=__puppeteer_evaluation_script__

That code is being sent and executed in Chromium. On the browser side, cov_npcpcae6x doesn't exist.

[frantallukas10]

thank you for your help!
how can I fix it? can I use another function from puppeteer? I need scroll down if all songs are not visible in YouTube playlist I can use another function for scroll down but I don't think that it will fix it

[kblok]

@frantallukas10 They talk about that here jestjs/jest#7962 and here jestjs/jest#6793

As a workaround, you can also send the function as a string, so no one gets in the middle.

[frantallukas10]

testPathIgnorePatterns helped me with my issue https://jestjs.io/docs/en/configuration#testpathignorepatterns-arraystring
I exported every puppeteer evaluate methods from file and added to testPathIgnorePatterns config

[frantallukas10]

maybe it will be better add this information for this error... @kblok

[pgoos]

@kblok could you elaborate on sending the function as a string, maybe with an example?
Right now the only workaround that I see is @frantallukas10 approach to add every file that uses evaluate methods into jest config property testPathIgnorePatterns

[kblok]

@pgoos the jest team added an explanation in their docs :) https://jestjs.io/docs/puppeteer

[Barzou]

Thanks for the response @kblok
I solved my problem adding /* istanbul ignore next */ before page.evaluate calls :

/* istanbul ignore next */
const { headerHTML, footerHTML } = await page.evaluate(() => {
  ....
}