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How to use packages.replaceLocalNpmVersions method in Cypress

Best JavaScript code snippet using cypress

build.js

Source:build.js

...96    return packages.copyAllToDist(distDir())97  }98  const replaceLocalNpmVersions = function () {99    log('#replaceLocalNpmVersions')100    return packages.replaceLocalNpmVersions(distDir())101  }102  const npmInstallPackages = function () {103    log('#npmInstallPackages')104    const pathToPackages = distDir('packages', '*')105    return packages.npmInstallAll(pathToPackages)106  }107  const cleanLocalNpmPackages = function () {108    log('#cleanLocalNpmPackages')109    return fs.removeAsync(distDir('npm'))110  }111  /**112   * Creates the package.json file that sits in the root of the output app113   */114  const createRootPackage = function () {...

Using AI Code Generation

1const { replaceLocalNpmVersions } = require('@cypress/webpack-preprocessor');2const options = {3  webpackOptions: {4    resolve: {5      alias: {6      }7    }8  }9};10module.exports = (on, config) => {11  on('file:preprocessor', replaceLocalNpmVersions(options));12};13module.exports = (on, config) => {14  require('@cypress/code-coverage/task')(on, config);15  require('@cypress/react/plugins/react-scripts')(on, config);16  require('@cypress/webpack-preprocessor')(on, config);17  return config;18};19import 'cypress-react-unit-test/support';20import '@cypress/code-coverage/support';21import '@cypress/react/support';22import React from 'react';23import { mount } from 'cypress-react-unit-test';24describe('Test', () => {25  it('test', () => {26    mount(<div>Test</div>);27  });28});29{30  "dependencies": {31  },32  "devDependencies": {

Using AI Code Generation

1const {replaceLocalNpmVersions} = require('cypress/lib/tasks/packages')2replaceLocalNpmVersions({3    {4    }5}).then(() => {6  console.log('replaced lodash with 4.17.11')7})8{9  "dependencies": {10  }11}12The above will install the latest version of lodash (currently 4.17.12). If you want to test your app with lodash 4.17.11, you can do the following:13const {replaceLocalNpmVersions} = require('cypress/lib/tasks/packages')14replaceLocalNpmVersions({15    {16    }17}).then(() => {18  console.log('replaced lodash with 4.17.11')19})

Using AI Code Generation

1const { replaceLocalNpmVersions } = require('cypress/lib/tasks/packages');2const fs = require('fs');3const packageJson = fs.readFileSync('package.json', 'utf8');4const packageLockJson = fs.readFileSync('package-lock.json', 'utf8');5replaceLocalNpmVersions(packageJson, packageLockJson)6.then((replacements) => {7  console.log('replacements', replacements);8  fs.writeFileSync('package-lock.json', replacements.packageLockJson);9})10.catch((error) => {11  console.error('error', error);12});

Using AI Code Generation

1const { replaceLocalNpmVersions } = require('cypress/lib/tasks/packages')2replaceLocalNpmVersions({3        {4        }5})6"env": {7}8const { replaceLocalNpmVersions } = require('cypress/lib/tasks/packages')9replaceLocalNpmVersions({10        {11        }12})13"env": {14}15const { replaceLocalNpmVersions } = require('cypress/lib/tasks/packages')16replaceLocalNpmVersions({17        {18        }19})20"env": {21}22const { replaceLocalNpmVersions } = require('cypress/lib/tasks/packages')23replaceLocalNpmVersions({24        {25        }26})

Using AI Code Generation

1const packages = Cypress.packages;2packages.replaceLocalNpmVersions({3});4import myPackage from 'my-package';5myPackage.doSomething();6describe('Test', () => {7    it('should do something', () => {8        myPackage.doSomething();9    });10});11import myPackage from 'my-package';12myPackage.doSomething();13import myPackage from 'my-package';14myPackage.doSomething();15import myPackage from 'my-package';16myPackage.doSomething();17import myPackage from 'my-package';18myPackage.doSomething();19import myPackage from 'my-package';20myPackage.doSomething();21{22    "env": {23    }24}

Using AI Code Generation

1import { packages } from '@packages/runner-shared'2const test = () => {3  const remotePackage = {4  }5  packages.replaceLocalNpmVersions([remotePackage])6}7test()8{9  "env": {10  }11}12const { packages } = require('@packages/runner-shared')13module.exports = (on, config) => {14  on('task', {15    test () {16      const remotePackage = {17      }18      packages.replaceLocalNpmVersions([remotePackage])19    },20  })21}22const { packages } = require('@packages/runner-shared')23Cypress.on('test:after:run', () => {24  const remotePackage = {25  }26  packages.replaceLocalNpmVersions([remotePackage])27})28describe('test', () => {29  it('test', () => {30    const remotePackage = {31    }32    packages.replaceLocalNpmVersions([remotePackage])33  })34})

Cypress Tutorial

Cypress is a renowned Javascript-based open-source, easy-to-use end-to-end testing framework primarily used for testing web applications. Cypress is a relatively new player in the automation testing space and has been gaining much traction lately, as evidenced by the number of Forks (2.7K) and Stars (42.1K) for the project. LambdaTest’s Cypress Tutorial covers step-by-step guides that will help you learn from the basics till you run automation tests on LambdaTest.

Chapters:

What is Cypress? -
Why Cypress? - Learn why Cypress might be a good choice for testing your web applications.
Features of Cypress Testing - Learn about features that make Cypress a powerful and flexible tool for testing web applications.
Cypress Drawbacks - Although Cypress has many strengths, it has a few limitations that you should be aware of.
Cypress Architecture - Learn more about Cypress architecture and how it is designed to be run directly in the browser, i.e., it does not have any additional servers.
Browsers Supported by Cypress - Cypress is built on top of the Electron browser, supporting all modern web browsers. Learn browsers that support Cypress.
Selenium vs Cypress: A Detailed Comparison - Compare and explore some key differences in terms of their design and features.
Cypress Learning: Best Practices - Take a deep dive into some of the best practices you should use to avoid anti-patterns in your automation tests.
How To Run Cypress Tests on LambdaTest? - Set up a LambdaTest account, and now you are all set to learn how to run Cypress tests.

Certification

You can elevate your expertise with end-to-end testing using the Cypress automation framework and stay one step ahead in your career by earning a Cypress certification. Check out our Cypress 101 Certification.