Fixes multiple Cypress plugins subscribing to "on" events
See #22428 issue.
Read the blog post Fix For Cypress Plugin Events.
Add this NPM package as a dev dependency
# install using NPM
$ npm i -D cypress-on-fix
# install using Yarn
$ yarn add -D cypress-on-fix
Wrap the on passed by Cypress in your config file
const { defineConfig } = require('cypress')
module.exports = defineConfig({
e2e: {
// baseUrl, etc
supportFile: false,
fixturesFolder: false,
setupNodeEvents(cypressOn, config) {
// https://github.com/bahmutov/cypress-on-fix
const on = require('cypress-on-fix')(cypressOn)
// use "on" to register plugins, for example
// https://github.com/bahmutov/cypress-split
require('cypress-split')(on, config)
// https://github.com/bahmutov/cypress-watch-and-reload
require('cypress-watch-and-reload/plugins')(on, config)
// https://github.com/bahmutov/cypress-code-coverage
require('@bahmutov/cypress-code-coverage/plugin')(on, config)
},
},
})If there are multiple plugins that returns a value, the last one result will be returned
const on = require('cypress-on-fix')(cypressOn)
on('before:browser:launch', (browser, launchOptions) => {
if (browser.name === 'chrome') {
launchOptions.args.push('--window-size=1366,768')
return launchOptions
}
})
on('before:browser:launch', (browser, launchOptions) => {
if (browser.name === 'chrome') {
launchOptions.args.push('--window-size=1280,720')
return launchOptions
}
})In the situation above, the Chrome browser will be opened with the window size 1280x720
This module uses debug to print verbose log messages. Run Cypress with
DEBUG=cypress-on-fix npx cypress run ...
setupNodeEvents(on, config) {
on('after:spec', (a) => {
console.log('after spec 1', a.relative)
})
on('after:spec', (a) => {
console.log('after spec 2', a.relative)
})
on('after:spec', (a) => {
console.log('after spec 3', a.relative)
})
}Without this plugin only the last event listener is invoked
after spec 3 cypress/e2e/spec1.cy.js
With this proxy, all listeners are invoked
setupNodeEvents(cypressOn, config) {
// https://github.com/bahmutov/cypress-on-fix
const on = require('cypress-on-fix')(cypressOn)
on('after:spec', (a) => {
console.log('after spec 1', a.relative)
})
on('after:spec', (a) => {
console.log('after spec 2', a.relative)
})
on('after:spec', (a) => {
console.log('after spec 3', a.relative)
})
}after spec 1 cypress/e2e/spec1.cy.js
after spec 2 cypress/e2e/spec1.cy.js
after spec 3 cypress/e2e/spec1.cy.js
Author: Gleb Bahmutov <gleb.bahmutov@gmail.com> © 20223
- @bahmutov
- glebbahmutov.com
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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) 2023 Gleb Bahmutov <gleb.bahmutov@gmail.com>
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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