Percy server fails to respond with Cypress open

i have a new gatsby project, setup with cypress and percy-cypress, where i’m experiencing some crashing that i’m trying to narrow down. you can find a reproduction repository here.

to reproduce:

• start the gatsby site: npm run develop
• in a new tab:
  • ./node_modules/.bin/cypress run (this works)
  • ./node_modules/.bin/cypress open -> run tests -> crash

specifically disabling percy doesn’t seem to work either:

• start the gatsby site: npm run develop
• in a new tab:
  • PERCY_ENABLE=false ./node_modules/.bin/cypress open -> run tests -> crash

my initial thought was the percy server must be running no matter what, however if you then:

• start the gatsby site: npm run develop
• in a new tab:
  • percy exec -- ./node_modules/.bin/cypress open -> run tests
  • i see as output:

[percy] Skipping visual tests - Missing Percy token
[percy] Running "./node_modules/.bin/cypress open"

i still experience a crash. additionally, supplying a token doesn’t help either. while i don’t experience a crash in this particular scenario, i don’t my my team uploading snapshots running tests locally. i haven’t yet been able to disable percy for local development, with PERCY_BRANCH=local or PERCY_ENABLE=false. and fwiw, i’m using a Mac, on BigSur, version 11.2.3.

let me know if you need more information. thanks!

[cassus]

Thanks @MarosPistej for the workaround, it worked for me as well!

This was my crash error message, I put it here, so others may find the workaround easier

RangeError: Maximum call stack size exceeded
    at _deconstructPacket (<...>node_modules/socket.io-parser/dist/binary.js:21:28)
    at _deconstructPacket (<...>node_modules/socket.io-parser/dist/binary.js:40:32)

    <15k lines of the same message>

    at _deconstructPacket (<...>node_modules/socket.io-parser/dist/binary.js:32:26)
    at Object.deconstructPacket (<...>node_modules/socket.io-parser/dist/binary.js:16:17)
    at Encoder.encodeAsBinary (<...>node_modules/socket.io-parser/dist/index.js:81:41)
    at Encoder.encode (<...>node_modules/socket.io-parser/dist/index.js:43:29)
    at Client._packet (<...>node_modules/socket.io/dist/client.js:167:44)
    at Socket.packet (<...>node_modules/socket.io/dist/socket.js:161:21)
    at <...>node_modules/socket.io/dist/socket.js:270:18
    at <...>/7.1.0/Cypress.app/Contents/Resources/app/packages/server/lib/socket-base.js:325:28
    at tryCatcher (<...>/7.1.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/util.js:16:23)
    at Promise._settlePromiseFromHandler (<...>/7.1.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/promise.js:547:31)
    at Promise._settlePromise (<...>/7.1.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/promise.js:604:18)
    at Promise._settlePromise0 (<...>/7.1.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/promise.js:649:10)
    at Promise._settlePromises (<...>/7.1.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/promise.js:725:18)
    at _drainQueueStep (<...>/7.1.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/async.js:93:12)
    at _drainQueue (<...>/7.1.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/async.js:86:9)
    at Async._drainQueues (<...>/7.1.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/async.js:102:5)
    at Immediate.Async.drainQueues [as _onImmediate] (<...>/7.1.0/Cypress.app/Contents/Resources/app/packages/server/node_modules/bluebird/js/release/async.js:15:14)
    at processImmediate (internal/timers.js:461:21)

[MarosPistej]

to my issue #320 which is most likely same as this one worked also modifying cypress/support/index.js file and include code bellow

import { isPercyEnabled } from "@percy/sdk-utils";
isPercyEnabled();

this works even with Cypress 7.1.0

in fact calling isPercyEnabled() anytime but before invoking cy.percySnapshot() work…