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How to use rewriteJsSourceMap method in Cypress

Best JavaScript code snippet using cypress

js.js

Source:js.js

...40        url,41    });42    return `window.top.Cypress.utils.throwErrByPath('proxy.js_rewriting_failed', { args: ${args} })`;43}44function rewriteJsSourceMap(url, js, inputSourceMap) {45    try {46        const { sourceFileName, sourceMapName, sourceRoot } = sourceMaps.getPaths(url);47        const ast = recast.parse(js, { sourceFileName });48        astTypes.visit(ast, js_rules_1.jsRules);49        return recast.print(ast, Object.assign({ inputSourceMap,50            sourceMapName,51            sourceRoot }, defaultPrintOpts)).map;52    }53    catch (err) {54        debug('error while parsing JS %o', { err, js: js.slice ? js.slice(0, 500) : js });55        return { err };56    }57}58exports.rewriteJsSourceMap = rewriteJsSourceMap;...

worker.js

Source:worker.js

1"use strict";2// this is designed to run as its own thread, managed by `threads.ts`3// WARNING: take care to not over-import modules here - the upfront4// mem/CPU cost is paid up to threads.MAX_WORKER_THREADS times5var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {6    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }7    return new (P || (P = Promise))(function (resolve, reject) {8        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }9        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }10        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }11        step((generator = generator.apply(thisArg, _arguments || [])).next());12    });13};14Object.defineProperty(exports, "__esModule", { value: true });15const worker_threads_1 = require("worker_threads");16if (worker_threads_1.isMainThread) {17    throw new Error(`${__filename} should only be run as a worker thread`);18}19const js_1 = require("../js");20const html_1 = require("../html");21worker_threads_1.parentPort.postMessage(true);22let _idCounter = 0;23worker_threads_1.parentPort.on('message', (req) => __awaiter(void 0, void 0, void 0, function* () {24    if (req.shutdown) {25        return process.exit();26    }27    const startedAt = Date.now();28    function _deferSourceMapRewrite(deferredSourceMap) {29        const uniqueId = [worker_threads_1.threadId, _idCounter++].join('.');30        _reply({31            threadMs: _getThreadMs(),32            deferredSourceMap: Object.assign({ uniqueId }, deferredSourceMap),33        });34        return uniqueId;35    }36    function _reply(res) {37        req.port.postMessage(res);38    }39    function _getThreadMs() {40        return Date.now() - startedAt;41    }42    function _getOutput() {43        if (req.isHtml) {44            return (0, html_1.rewriteHtmlJs)(req.url, req.source, _deferSourceMapRewrite);45        }46        if (req.sourceMap) {47            return (0, js_1.rewriteJsSourceMap)(req.url, req.source, req.inputSourceMap);48        }49        return (0, js_1.rewriteJs)(req.url, req.source, _deferSourceMapRewrite);50    }51    try {52        const output = yield _getOutput();53        _reply({ output, threadMs: _getThreadMs() });54    }55    catch (error) {56        _reply({ error, threadMs: _getThreadMs() });57    }58    return req.port.close();...

Using AI Code Generation

1const cypress = require('cypress');2const fs = require('fs');3cypress.run({4  config: {5    env: {6    },7    env: {8    }9  }10}).then((results) => {11  fs.writeFileSync('./cypress/results.json', JSON.stringify(results));12  console.log(results);13  console.log('Cypress run completed');14}).catch((error) => {15  console.error(error);16  process.exit(1);17});18describe('My First Test', function() {19  it('Does not do much!', function() {20    cy.contains('Welcome to React');21  });22});23{24  "env": {25  },26}27const cypress = require('cypress');28const fs = require('fs');29cypress.run({30  config: {31    env: {32    },33    env: {34    }35  }36}).then((results) => {37  fs.writeFileSync('./cypress/results.json', JSON.stringify(results));38  console.log(results);39  console.log('Cypress run completed');40}).catch((error) => {41  console.error(error);42  process.exit(1);43});

Using AI Code Generation

1import { rewriteJsSourceMap } from 'cypress-source-maps';2describe('Rewrite source maps', () => {3  it('Rewrite source maps', () => {4    rewriteJsSourceMap();5  });6});7module.exports = (on, config) => {8  on('task', {9    rewriteJsSourceMap: require('cypress-source-maps/lib/rewriteJsSourceMap'),10  });11};12import 'cypress-source-maps/support';

Using AI Code Generation

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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.