"must only be invoked from the spec file or support file." errors using cy.selectFile() & cy.readFile()

[S-Lomax]

Current behavior

Recently updated to Cypress 12.17.3 from 12.14 and are still getting "must only be invoked from the spec file or support file." errors when using commands cy.selectFile(), cy.readFile() and cy.task().

Exactly the same behaviour as https://github.com/cypress-io/cypress/issues/27149

Desired behavior

No response

Test code to reproduce

cy.get('[data-cy="QA_Automation_Section_Zip-accordion-button"]').click()
cy.get('[data-cy="thumbnail-button-QA_Automation_Slide_Zip"]').click()
cy.get('[data-cy="upload-container"]').selectFile('cypress/fixtures/QA_Automation_Slide_Deploy.png', {force: true})

Cypress Version

12.17.3

Node version

18.16.1

Operating System

Windows 10.0.19045.3208

Debug Logs

No response

Other

No response

[nagash77]

Hi @S-Lomax, In 12.15 we did do some work around privileged commands. However your example does not give enough context into how you are calling these functions that would cause this problem. In order to give our engineers the best chance at recreating your problem, please create a reproducible example using a fork of Cypress Test Tiny. This gives us the best chance of seeing exactly what you are seeing and being able to investigate effectively.

[S-Lomax]

Hi @nagash77, thank you for your response. So far we've been unable to reproduce the issue using https://github.com/cypress-io/cypress-test-tiny, even when we change the URL to our own app and use the same code.

We've tried clearing the cypress cache and reinstalling cypress but still hit the same issue every time. Is there any other information we might be able to give you that would help?

[adrienharnay]

Not sure it is linked to a cache problem, as we are facing the same issue on our CI since upgrading from 12.14.0 to 12.17.3 and we don't have any cache on it. Haven't figured out a way to reproduce it yet either.

[bobilo-qa]

HI @nagash77 I have the same problem as mentioned above. We updated our cypress from 10 to the newest version and for some reason, this line just stopped working:

uploadDocument() {
    cy.get(this.uploadDocumentsForm()).selectFile('cypress/fixtures/example.pdf', { force: true });
  }

I'm getting the same error: must only be invoked from the spec file or support file

[jbarthe]

Hi everyone, i'm still experiencing the same issue too. It was working on cypress 12.14.0 but since not.

Cypress Version

12.17.3

Test code to reproduce:

  it('should upload a document', () => {
    cy.intercept('POST', '/property_documents').as('uploadDocuments');

    cy.getBySel('dataroom-document-title')
      .first()
      .click();

    cy.getBySel('file-item').should('not.exist');

    cy.get('#file-uploader-1')
      .selectFile({
        contents: 'cypress/fixtures/rooms.json',
        fileName: 'file.png',
      }, { force: true });

    cy.wait('@uploadDocuments').then(() => {
      cy.getBySel('file-item').should('exist');
      cy.getBySel('dataroom-document-checked').should('exist');
      cy.getBySel('dataroom-document-unchecked').should('have.length', 21);
    });
  });

Current behavior

[nagash77]

Hi @jbarthe at a glance that test should work. Are you able to create a reproducible example using a fork of Cypress Test Tiny. This gives us the best chance of seeing exactly what you are seeing and being able to investigate effectively.

[BloodyRain2k]

I've started getting this issue a couple days ago. Completely randomly. Didn't update Cypress or anything.
Been working fine on this SPFX project using Cypress 12.17 for weeks.

And then I've started randomly getting these errors:

The worst part being that they are literally random...
I can run the exact same test 20 times and 1-2 of those times it might throw it...

It would be really helpful if the error logger would include the invokation origin.
Because as far as I can see, it's always the same: the spec file where the code came from...

I have yet to even find out if that error above about the SP worker might be related.
Edit: ok, seems like that one's not related. Just had a run that was completely fine again, despite the Web Worker constantly throwing errors.

[jennifer-shehane]

@BloodyRain2k We'd really like to address this issue if it's happening unwarranted to users and randomly.

Can anyone provide a reproducible example? Here are some tips for providing a Short, Self Contained, Correct, Example and our own Troubleshooting Cypress guide.

[S-Lomax]

Hi @jennifer-shehane we've been able to reproduce the issue using a fork of but only using our application. We're currently trying to work on a solution where we can provide a successful reproduction to you without giving access to our application.