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103 lines
3.4 KiB
JavaScript
103 lines
3.4 KiB
JavaScript
/// <reference types="cypress" />
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context('Querying', () => {
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beforeEach(() => {
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cy.visit('https://example.cypress.io/commands/querying');
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});
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// The most commonly used query is 'cy.get()', you can
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// think of this like the '$' in jQuery
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it('cy.get() - query DOM elements', () => {
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// https://on.cypress.io/get
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cy.get('#query-btn').should('contain', 'Button');
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cy.get('.query-btn').should('contain', 'Button');
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cy.get('#querying .well>button:first').should('contain', 'Button');
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// ↲
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// Use CSS selectors just like jQuery
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cy.get('[data-test-id="test-example"]').should('have.class', 'example');
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// 'cy.get()' yields jQuery object, you can get its attribute
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// by invoking `.attr()` method
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cy.get('[data-test-id="test-example"]')
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.invoke('attr', 'data-test-id')
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.should('equal', 'test-example');
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// or you can get element's CSS property
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cy.get('[data-test-id="test-example"]').invoke('css', 'position').should('equal', 'static');
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// or use assertions directly during 'cy.get()'
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// https://on.cypress.io/assertions
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cy.get('[data-test-id="test-example"]')
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.should('have.attr', 'data-test-id', 'test-example')
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.and('have.css', 'position', 'static');
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});
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it('cy.contains() - query DOM elements with matching content', () => {
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// https://on.cypress.io/contains
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cy.get('.query-list').contains('bananas').should('have.class', 'third');
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// we can pass a regexp to `.contains()`
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cy.get('.query-list').contains(/^b\w+/).should('have.class', 'third');
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cy.get('.query-list').contains('apples').should('have.class', 'first');
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// passing a selector to contains will
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// yield the selector containing the text
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cy.get('#querying').contains('ul', 'oranges').should('have.class', 'query-list');
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cy.get('.query-button').contains('Save Form').should('have.class', 'btn');
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});
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it('.within() - query DOM elements within a specific element', () => {
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// https://on.cypress.io/within
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cy.get('.query-form').within(() => {
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cy.get('input:first').should('have.attr', 'placeholder', 'Email');
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cy.get('input:last').should('have.attr', 'placeholder', 'Password');
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});
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});
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it('cy.root() - query the root DOM element', () => {
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// https://on.cypress.io/root
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// By default, root is the document
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cy.root().should('match', 'html');
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cy.get('.query-ul').within(() => {
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// In this within, the root is now the ul DOM element
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cy.root().should('have.class', 'query-ul');
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});
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});
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it('best practices - selecting elements', () => {
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// https://on.cypress.io/best-practices#Selecting-Elements
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cy.get('[data-cy=best-practices-selecting-elements]').within(() => {
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// Worst - too generic, no context
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cy.get('button').click();
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// Bad. Coupled to styling. Highly subject to change.
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cy.get('.btn.btn-large').click();
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// Average. Coupled to the `name` attribute which has HTML semantics.
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cy.get('[name=submission]').click();
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// Better. But still coupled to styling or JS event listeners.
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cy.get('#main').click();
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// Slightly better. Uses an ID but also ensures the element
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// has an ARIA role attribute
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cy.get('#main[role=button]').click();
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// Much better. But still coupled to text content that may change.
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cy.contains('Submit').click();
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// Best. Insulated from all changes.
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cy.get('[data-cy=submit]').click();
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});
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});
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});
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