/
assertions.spec.js
165 lines (144 loc) · 5.31 KB
/
assertions.spec.js
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/// <reference types="Cypress" />
context('Assertions', () => {
beforeEach(() => {
cy.visit('http://localhost:8080/commands/assertions')
})
describe('Implicit Assertions', () => {
it('.should() - make an assertion about the current subject', () => {
// https://on.cypress.io/should
cy.get('.assertion-table')
.find('tbody tr:last')
.should('have.class', 'success')
.find('td')
.first()
// checking the text of the <td> element in various ways
.should('have.text', 'Column content')
.should('contain', 'Column content')
.should('have.html', 'Column content')
// chai-jquery uses "is()" to check if element matches selector
.should('match', 'td')
// to match text content against a regular expression
// first need to invoke jQuery method text()
// and then match using regular expression
.invoke('text')
.should('match', /column content/i)
// a better way to check element's text content against a regular expression
// is to use "cy.contains"
// https://on.cypress.io/contains
cy.get('.assertion-table')
.find('tbody tr:last')
// finds first <td> element with text content matching regular expression
.contains('td', /column content/i)
.should('be.visible')
// for more information about asserting element's text
// see https://on.cypress.io/using-cypress-faq#How-do-I-get-an-element’s-text-contents
})
it('.and() - chain multiple assertions together', () => {
// https://on.cypress.io/and
cy.get('.assertions-link')
.should('have.class', 'active')
.and('have.attr', 'href')
.and('include', 'cypress.io')
})
})
describe('Explicit Assertions', () => {
// https://on.cypress.io/assertions
it('expect - make an assertion about a specified subject', () => {
// We can use Chai's BDD style assertions
expect(true).to.be.true
const o = { foo: 'bar' }
expect(o).to.equal(o)
expect(o).to.deep.equal({ foo: 'bar' })
// matching text using regular expression
expect('FooBar').to.match(/bar$/i)
})
it('pass your own callback function to should()', () => {
// Pass a function to should that can have any number
// of explicit assertions within it.
// The ".should(cb)" function will be retried
// automatically until it passes all your explicit assertions or times out.
cy.get('.assertions-p')
.find('p')
.should(($p) => {
// https://on.cypress.io/$
// return an array of texts from all of the p's
// @ts-ignore TS6133 unused variable
const texts = $p.map((i, el) => Cypress.$(el).text())
// jquery map returns jquery object
// and .get() convert this to simple array
const paragraphs = texts.get()
// array should have length of 3
expect(paragraphs, 'has 3 paragraphs').to.have.length(3)
// use second argument to expect(...) to provide clear
// message with each assertion
expect(paragraphs, 'has expected text in each paragraph').to.deep.eq([
'Some text from first p',
'More text from second p',
'And even more text from third p',
])
})
})
it('finds element by class name regex', () => {
cy.get('.docs-header')
.find('div')
// .should(cb) callback function will be retried
.should(($div) => {
expect($div).to.have.length(1)
const className = $div[0].className
expect(className).to.match(/heading-/)
})
// .then(cb) callback is not retried,
// it either passes or fails
.then(($div) => {
expect($div, 'text content').to.have.text('Introduction')
})
})
it('can throw any error', () => {
cy.get('.docs-header')
.find('div')
.should(($div) => {
if ($div.length !== 1) {
// you can throw your own errors
throw new Error('Did not find 1 element')
}
const className = $div[0].className
if (!className.match(/heading-/)) {
throw new Error(`Could not find class "heading-" in ${className}`)
}
})
})
it('matches unknown text between two elements', () => {
/**
* Text from the first element.
* @type {string}
*/
let text
/**
* Normalizes passed text,
* useful before comparing text with spaces and different capitalization.
* @param {string} s Text to normalize
*/
const normalizeText = (s) => s.replace(/\s/g, '').toLowerCase()
cy.get('.two-elements')
.find('.first')
.then(($first) => {
// save text from the first element
text = normalizeText($first.text())
})
cy.get('.two-elements')
.find('.second')
.should(($div) => {
// we can massage text before comparing
const secondText = normalizeText($div.text())
expect(secondText, 'second text').to.equal(text)
})
})
it('assert - assert shape of an object', () => {
const person = {
name: 'Joe',
age: 20,
}
assert.isObject(person, 'value is object')
})
})
})