doc.createTreeWalker is not a function

Current behavior

When running a Cypress test via the Test Runner:

node ./cypress/cypress.js -- open

I’m seeing this error thrown from cypress:

cypress_runner.js:175886 TypeError: doc.createTreeWalker is not a function
    at findShadowRoots (https://localhost:8080/__cypress/runner/cypress_runner.js:166508:22)
    at collectRoots (https://localhost:8080/__cypress/runner/cypress_runner.js:166488:24)
    at Object.findAllShadowRoots (https://localhost:8080/__cypress/runner/cypress_runner.js:166498:10)
    at getElements (https://localhost:8080/__cypress/runner/cypress_runner.js:143851:45)
From previous event:
    at resolveElements (https://localhost:8080/__cypress/runner/cypress_runner.js:143905:27)
    at $Cy.get (https://localhost:8080/__cypress/runner/cypress_runner.js:143916:14)
    at $Cy.now (https://localhost:8080/__cypress/runner/cypress_runner.js:156327:47)
    at resolveElements (https://localhost:8080/__cypress/runner/cypress_runner.js:144084:19)
From previous event:
    at tryFn (https://localhost:8080/__cypress/runner/cypress_runner.js:151739:21)
    at whenStable (https://localhost:8080/__cypress/runner/cypress_runner.js:151777:12)
    at https://localhost:8080/__cypress/runner/cypress_runner.js:151269:16
From previous event:
    at $Cy.retry (https://localhost:8080/__cypress/runner/cypress_runner.js:151249:38)
    at onFailFn (https://localhost:8080/__cypress/runner/cypress_runner.js:135999:19)
From previous event:
    at $Cy.verifyUpcomingAssertions (https://localhost:8080/__cypress/runner/cypress_runner.js:136006:63)
    at https://localhost:8080/__cypress/runner/cypress_runner.js:144090:21
From previous event:
    at resolveElements (https://localhost:8080/__cypress/runner/cypress_runner.js:144084:52)
    at tryFn (https://localhost:8080/__cypress/runner/cypress_runner.js:151739:21)
    at whenStable (https://localhost:8080/__cypress/runner/cypress_runner.js:151777:12)
    at https://localhost:8080/__cypress/runner/cypress_runner.js:151269:16

Desired behavior

No error is thrown

Test code to reproduce

I can’t share the full source code due to my company’s policies. Maybe a simpler repro could be made once I have some idea of where this issue is coming from.

The line of code where this is failing is cy.findByRole('tabpanel', { hidden: false }).findByTestId('RichCommandFooter').contains('runtime');

Cypress Version

8.1.0

Other

Happy to provide more details. Our cypress.js file has a good amount going on it, but I’m not sure what would be most relevant to help debug.

@testing-library/cypress is on version 8.0.1

[BlueWinds]

This looks suspiciously like another manifestation of the same underlaying bug as https://github.com/cypress-io/cypress/issues/7306. We’ve spent a lot of work looking into that for Cypress 12.0.0 - my hope is that this issue will be resolved in Cy12, which should come out next week.

Going to assign myself so I remember to follow up here after release.

[aquanow-rtran]

Hi everyone, would just like to leave my two cents on this issue as I am also experiencing it. I have noticed in my tests that the createTreeWalker is not a function error occurs when the tests are trying to get an element that is currently being loaded in. Have seen two different instances where it has happened. Once when I’m performing a cy.get().contains() and another where my table hasn’t fully loaded in yet. My workaround was to change cy.get().contains() to cy.contains(selector, content) and to input a {timeout: 10000} Hope my solution is able to at least get your tests running until a proper fix could be applied