A custom Cypress command to wrap the remote debugger protocol low level command
npm install cypress-cdp> A custom Cypress command to wrap the Chrome remote debugger protocol low level command
Read my blog posts that show this plugin in action:
- Cypress automation
- When Can The Test Click
- Solve The First Click
- Rendered font
- Emulate Media In Cypress Tests
- Testing CSS Print Media Styles
š Covered in my course Cypress Plugins, Cypress Network Testing Exercises, and TDD Calculator:
- Lesson e5: Print page as PDF
- Lesson c6: Exit fullscreen mode using cypress-cdp
- Lesson c7: Set custom timezone and locale
- Lesson c9: Disable network caching during the test
- Bonus 99: Confirm the form works with CSS styles disabled
Add this plugin as your dev dependency
``install using NPM
$ npm i -D cypress-cdpor install using Yarn
$ yarn add -D cypress-cdp
Then import this plugin in your spec or support file
`js`
// https://github.com/bahmutov/cypress-cdp
import 'cypress-cdp'
Similar to clicking the checkbox "Disable cache" in the Network tab
`js`
import 'cypress-cdp'
cy.CDP('Network.setCacheDisabled', {
cacheDisabled: true,
})
#### CDP example 1
`js`
const selector = 'button#one'
cy.CDP('Runtime.evaluate', {
expression: 'frames[0].document.querySelector("' + selector + '")',
}).should((v) => {
expect(v.result).to.have.property('objectId')
})
Tip: be careful with selectors, you probably will need to escape them. For example, this library uses this escape
`js`
const escapedSelector = JSON.stringify(selector)
cy.CDP('Runtime.evaluate', {
expression: 'frames[0].document.querySelector(' + escapedSelector + ')',
})
#### hasEventListeners example
`js`
// any event listeners are attached
cy.hasEventListeners('button#one')
// "click" event listeners are attached
cy.hasEventListeners('button#one', { type: 'click' })
Returns the internal element's Node Id that can be used to query the run-time properties, for example the rendered font.
`js`
cy.getCDPNodeId('body').then((nodeId) => {
cy.CDP('CSS.getPlatformFontsForNode', {
nodeId,
})
})
Defined in src/index.d.ts and copied from the original PR 66237. If you want your project to "know" the cy.CDP command, include this dependency, for example:
`json``
{
"types": ["cypress", "cypress-cdp"]
}
Author: Gleb Bahmutov <gleb.bahmutov@gmail.com> © 2022
- @bahmutov
- glebbahmutov.com
- blog
- videos
- presentations
- cypress.tips
- Cypress Tips & Tricks Newsletter
- my Cypress courses
License: MIT - do anything with the code, but don't blame me if it does not work.
Support: if you find any problems with this module, email / tweet /
open issue on Github
Copyright (c) 2022 Gleb Bahmutov <gleb.bahmutov@gmail.com>
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