Hier die app.js:

const random = Math.random() * 100 // random ms of time
const btn = document.createElement('button')
document.body.appendChild(btn)
setTimeout(() => {
  // add the class active after a random amount of time
  btn.setAttribute('class', 'active')
}, random)

und der dazugehörige Test in der test.cs.js:

it('does something different based on the class of the button', () => {
  // RERUN THIS TEST OVER AND OVER AGAIN
  // AND IT WILL SOMETIMES BE TRUE, AND
  // SOMETIMES BE FALSE.
  cy.get('button').then(($btn) => {
    if ($btn.hasClass('active')) {
      // do something if it's active
    } else {
      // do something else
    }
  })
})

Ist dieser Test deterministisch?