"Invariant: WORKERS_COUNT not found" when I use browser started manually

[gorshkov-leonid]

We use server that was already up not by jest-puppeteer and got the error:

Explaination:
Invariant: WORKERS_COUNT not found

      at readWorkersCount (node_modules/jest-environment-puppeteer/dist/index.js:96:15)
      at getWorkerWsEndpointIndex (node_modules/jest-environment-puppeteer/dist/index.js:117:21)
      at getWorkerWsEndpoint (node_modules/jest-environment-puppeteer/dist/index.js:121:19)
      at connectBrowserFromWorker (node_modules/jest-environment-puppeteer/dist/index.js:129:24)
      at connectBrowser (node_modules/jest-environment-puppeteer/dist/index.js:159:28)
      at initAll (node_modules/jest-environment-puppeteer/dist/index.js:217:11)
      at PuppeteerEnvironment.setup (node_modules/jest-environment-puppeteer/dist/index.js:257:15)

Version of jest-environment-puppeteer is 9.0.2

I can see return here:
https://github.com/argos-ci/jest-puppeteer/blob/main/packages/jest-environment-puppeteer/src/browsers.ts#L83

That means workersCount is not set to env. Is it ok?

[gorshkov-leonid]

Seemingly it has been broken here:
32acec7#diff-0ef3ef86eddd077b98ff774dd7279e54863e640e3ca6411c3835802aa3e35612R83

[gregberge]

Fixed in #578