Make running Percy integration optional

I would like to have cy.percySnapshot() in my tests so that I get visual diffing while running on my CI. But when our developers run tests locally, I do not want to do visual diffing (so that they do not need to setup Percy tokens and stuff like that). It seems that currently cy.percySnapshot() fails if Percy is not running.

[CyrilKrylatov]

Hello @djones!

Sorry to reopen this one after such a long time but it seems like my tests running via ./node_modules/.bin/cypress run (so, without the percy command as I don’t want Percy to be involved here, I need Cypress to run without Percy), my test is failing.

        "@percy/cli": "^1.0.0-beta.70",
        "@percy/cypress": "^3.1.1",

my become-seller.spec.js:

describe('Test the Become Seller page', () => {
  it('Goes on the registration page', () => {
    /**
     * @param {Object} routes.statics
     * @param {string} routes.statics.becomeSeller
     */
    cy.fixture('routes').then((routes) => {
      cy.visit(routes.statics.becomeSeller)
    })
    cy.window()
      .scrollTo('bottom', { duration: 50 })
    cy.percySnapshot()
  })
})

If I remove the cy.percySnapshot() it works well.

You can find the whole output here: https://gist.github.com/CyrilKrylatov/fff45dc898f77d4bc57103fe89edb2ef

Do you have any input on why the test is failing?

Thank you for your time. ✌️

Edit: oh, it’s related to #434.

[mitar]

Thanks!