TypeError: Cannot convert undefined or null to object failing the test

Current behavior:

My tests are failing because of the TypeError: Cannot convert undefined or null to object failing the test

Steps to reproduce

I wrote the following test, yet it fails, I followed the documentation but don’t see what I did wrong.

context('Checkout', () => {
  
  before(() => {
    cy.visit('https://www.geluk.com/feest-en-themadagen')
  })

  it('clicks the first product', () => {
    cy.get('.product-item__title').contains('Amerigo').click()
  })

  it('clicks the custom product options', () => {
    cy.get('select.product-custom-option').eq(0).select('Geen')
    cy.get('select.product-custom-option').eq(3).select('Geen')
  })

  it('clicks the checkout button', () => {
    cy.contains('Direct bestellen').click()
  })

  it('checks if we are on the right location', () => {
    cy.url().should('include', '/onestepcheckout')
  })

})

Versions

Cypress version 3.2.0, using npx cypress open to show the runner, no changes made to that. Mac OSX Mojave 10.14

[WinstonN]

Hi,

I have had some time to look into this error

It appears for me when selecting product options, address autocomplete drop down options, and it prevented my checkout from completing

I first started by going over the versions of https://github.com/julien-maurel/jQuery-Storage-API, to see if I can upgrade, but that did not solve my issue

Early on in my tests, I saw that my local storage (which Magento 2 depends on) are being cleared. This is a philosophy of Cypress and I agree with it, but Magento depends on that storage data being set - I found the same for cookies btw

What I ended up doing was to set the below at the top of my test

Cypress.LocalStorage.clear = function(keys, ls, rs) {};

That has prevented the error from firing, and my tests, now function as they should

Hope it helps!

[paulmaxwell]

Also seeing this error with Magento, but only in the graphic test runner. Tests work fine in the CLI.