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How to use mergeWithPreservedBuffers method in Cypress
Best JavaScript code snippet using cypress
util.js
Source:util.js 
...185 !after.headers[k] && delete before.headers[k];186 }187}188exports.mergeDeletedHeaders = mergeDeletedHeaders;189function mergeWithPreservedBuffers(before, after) {190 // lodash merge converts Buffer into Array (by design)191 // https://github.com/lodash/lodash/issues/2964192 // @see https://github.com/cypress-io/cypress/issues/15898193 lodash_1.default.mergeWith(before, after, (_a, b) => {194 if (b instanceof Buffer) {195 return b;196 }197 return undefined;198 });199}200exports.mergeWithPreservedBuffers = mergeWithPreservedBuffers;201function getBodyEncoding(req) {202 if (!req || !req.body) {203 return null;...
request.js
Source:request.js
1"use strict";2var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {3 function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }4 return new (P || (P = Promise))(function (resolve, reject) {5 function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }6 function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }7 function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }8 step((generator = generator.apply(thisArg, _arguments || [])).next());9 });10};11var __importDefault = (this && this.__importDefault) || function (mod) {12 return (mod && mod.__esModule) ? mod : { "default": mod };13};14Object.defineProperty(exports, "__esModule", { value: true });15exports.InterceptRequest = void 0;16const lodash_1 = __importDefault(require("lodash"));17const network_1 = require("../../../../network");18const debug_1 = __importDefault(require("debug"));19const url_1 = __importDefault(require("url"));20const types_1 = require("../../types");21const route_matching_1 = require("../route-matching");22const util_1 = require("../util");23const intercepted_request_1 = require("../intercepted-request");24const debug = (0, debug_1.default)('cypress:net-stubbing:server:intercept-request');25/**26 * Called when a new request is received in the proxy layer.27 */28const InterceptRequest = function () {29 return __awaiter(this, void 0, void 0, function* () {30 if ((0, route_matching_1.matchesRoutePreflight)(this.netStubbingState.routes, this.req)) {31 // send positive CORS preflight response32 return (0, util_1.sendStaticResponse)(this, {33 statusCode: 204,34 headers: {35 'access-control-max-age': '-1',36 'access-control-allow-credentials': 'true',37 'access-control-allow-origin': this.req.headers.origin || '*',38 'access-control-allow-methods': this.req.headers['access-control-request-method'] || '*',39 'access-control-allow-headers': this.req.headers['access-control-request-headers'] || '*',40 },41 });42 }43 const matchingRoutes = [];44 const populateMatchingRoutes = (prevRoute) => {45 const route = (0, route_matching_1.getRouteForRequest)(this.netStubbingState.routes, this.req, prevRoute);46 if (!route) {47 return;48 }49 matchingRoutes.push(route);50 populateMatchingRoutes(route);51 };52 populateMatchingRoutes();53 if (!matchingRoutes.length) {54 // not intercepted, carry on normally...55 return this.next();56 }57 const request = new intercepted_request_1.InterceptedRequest({58 continueRequest: this.next,59 onError: this.onError,60 onResponse: (incomingRes, resStream) => {61 (0, util_1.setDefaultHeaders)(this.req, incomingRes);62 this.onResponse(incomingRes, resStream);63 },64 req: this.req,65 res: this.res,66 socket: this.socket,67 state: this.netStubbingState,68 matchingRoutes,69 });70 debug('intercepting request %o', { requestId: request.id, req: lodash_1.default.pick(this.req, 'url') });71 // attach requestId to the original req object for later use72 this.req.requestId = request.id;73 this.netStubbingState.requests[request.id] = request;74 const req = lodash_1.default.extend(lodash_1.default.pick(request.req, types_1.SERIALIZABLE_REQ_PROPS), {75 url: request.req.proxiedUrl,76 });77 request.res.once('finish', () => __awaiter(this, void 0, void 0, function* () {78 request.handleSubscriptions({79 eventName: 'after:response',80 data: request.includeBodyInAfterResponse ? {81 finalResBody: request.res.body,82 } : {},83 mergeChanges: lodash_1.default.noop,84 });85 debug('request/response finished, cleaning up %o', { requestId: request.id });86 delete this.netStubbingState.requests[request.id];87 }));88 const ensureBody = () => {89 return new Promise((resolve) => {90 if (req.body) {91 return resolve();92 }93 request.req.pipe((0, network_1.concatStream)((reqBody) => {94 req.body = reqBody;95 resolve();96 }));97 });98 };99 yield ensureBody();100 if (!lodash_1.default.isString(req.body) && !lodash_1.default.isBuffer(req.body)) {101 throw new Error('req.body must be a string or a Buffer');102 }103 const bodyEncoding = (0, util_1.getBodyEncoding)(req);104 const bodyIsBinary = bodyEncoding === 'binary';105 if (bodyIsBinary) {106 debug('req.body contained non-utf8 characters, treating as binary content %o', { requestId: request.id, req: lodash_1.default.pick(this.req, 'url') });107 }108 // leave the requests that send a binary buffer unchanged109 // but we can work with the "normal" string requests110 if (!bodyIsBinary) {111 req.body = req.body.toString('utf8');112 }113 request.req.body = req.body;114 const mergeChanges = (before, after) => {115 if (before.headers['content-length'] === after.headers['content-length']) {116 // user did not purposely override content-length, let's set it117 after.headers['content-length'] = String(Buffer.from(after.body).byteLength);118 }119 // resolve and propagate any changes to the URL120 request.req.proxiedUrl = after.url = url_1.default.resolve(request.req.proxiedUrl, after.url);121 (0, util_1.mergeWithPreservedBuffers)(before, lodash_1.default.pick(after, types_1.SERIALIZABLE_REQ_PROPS));122 (0, util_1.mergeDeletedHeaders)(before, after);123 };124 const modifiedReq = yield request.handleSubscriptions({125 eventName: 'before:request',126 data: req,127 mergeChanges,128 });129 mergeChanges(req, modifiedReq);130 // @ts-ignore131 mergeChanges(request.req, req);132 if (request.responseSent) {133 // request has been fulfilled with a response already, do not send the request outgoing134 // @see https://github.com/cypress-io/cypress/issues/15841135 return this.end();136 }137 return request.continueRequest();138 });139};...
response.js
Source:response.js
1"use strict";2var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {3 function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }4 return new (P || (P = Promise))(function (resolve, reject) {5 function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }6 function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }7 function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }8 step((generator = generator.apply(thisArg, _arguments || [])).next());9 });10};11var __importDefault = (this && this.__importDefault) || function (mod) {12 return (mod && mod.__esModule) ? mod : { "default": mod };13};14Object.defineProperty(exports, "__esModule", { value: true });15exports.InterceptResponse = void 0;16const lodash_1 = __importDefault(require("lodash"));17const network_1 = require("../../../../network");18const debug_1 = __importDefault(require("debug"));19const istextorbinary_1 = require("istextorbinary");20const types_1 = require("../../types");21const util_1 = require("../util");22const debug = (0, debug_1.default)('cypress:net-stubbing:server:intercept-response');23const InterceptResponse = function () {24 return __awaiter(this, void 0, void 0, function* () {25 const request = this.netStubbingState.requests[this.req.requestId];26 debug('InterceptResponse %o', { req: lodash_1.default.pick(this.req, 'url'), request });27 if (!request) {28 // original request was not intercepted, nothing to do29 return this.next();30 }31 request.onResponse = (incomingRes, resStream) => {32 this.incomingRes = incomingRes;33 request.continueResponse(resStream);34 };35 request.continueResponse = (newResStream) => {36 if (newResStream) {37 this.incomingResStream = newResStream.on('error', this.onError);38 }39 this.next();40 };41 this.makeResStreamPlainText();42 const body = yield new Promise((resolve) => {43 if (network_1.httpUtils.responseMustHaveEmptyBody(this.req, this.incomingRes)) {44 resolve(Buffer.from(''));45 }46 else {47 this.incomingResStream.pipe((0, network_1.concatStream)(resolve));48 }49 })50 .then((buf) => {51 return (0, istextorbinary_1.getEncoding)(buf) !== 'binary' ? buf.toString('utf8') : buf;52 });53 const res = lodash_1.default.extend(lodash_1.default.pick(this.incomingRes, types_1.SERIALIZABLE_RES_PROPS), {54 url: this.req.proxiedUrl,55 body,56 });57 if (!lodash_1.default.isString(res.body) && !lodash_1.default.isBuffer(res.body)) {58 throw new Error('res.body must be a string or a Buffer');59 }60 const mergeChanges = (before, after) => {61 (0, util_1.mergeWithPreservedBuffers)(before, lodash_1.default.pick(after, types_1.SERIALIZABLE_RES_PROPS));62 (0, util_1.mergeDeletedHeaders)(before, after);63 };64 const modifiedRes = yield request.handleSubscriptions({65 eventName: ['before:response', 'response:callback', 'response'],66 data: res,67 mergeChanges,68 });69 mergeChanges(request.res, modifiedRes);70 const bodyStream = yield (0, util_1.getBodyStream)(modifiedRes.body, lodash_1.default.pick(modifiedRes, ['throttleKbps', 'delay']));71 return request.continueResponse(bodyStream);72 });73};...
Using AI Code Generation
1cy.mergeWithPreservedBuffers();2cy.mergeWithPreservedBuffers();3cy.mergeWithPreservedBuffers();4cy.mergeWithPreservedBuffers();5cy.mergeWithPreservedBuffers();6cy.mergeWithPreservedBuffers();7cy.mergeWithPreservedBuffers();8cy.mergeWithPreservedBuffers();9cy.mergeWithPreservedBuffers();10cy.mergeWithPreservedBuffers();11cy.mergeWithPreservedBuffers();12cy.mergeWithPreservedBuffers();13cy.mergeWithPreservedBuffers();14cy.mergeWithPreservedBuffers();15cy.mergeWithPreservedBuffers();16cy.mergeWithPreservedBuffers();17cy.mergeWithPreservedBuffers();18cy.mergeWithPreservedBuffers();19cy.mergeWithPreservedBuffers();20cy.mergeWithPreservedBuffers();21cy.mergeWithPreservedBuffers();22cy.mergeWithPreservedBuffers();
Using AI Code Generation
1Cypress.Blob.mergeWithPreservedBuffers = (buffer1, buffer2) => {2 const mergedBuffer = Buffer.concat([buffer1, buffer2])3 return Cypress.Promise.resolve(mergedBuffer)4}5Cypress.Commands.add('uploadFile', (fileName, fileType = ' ', selector) => {6 return cy.get(selector).then(subject => {7 cy.fixture(fileName, 'base64')8 .then(Cypress.Blob.base64StringToBlob)9 .then(blob => {10 const testFile = new File([blob], fileName, { type: fileType })11 const dataTransfer = new DataTransfer()12 dataTransfer.items.add(testFile)13 })14 })15})16Cypress.Commands.add('attachFile', { prevSubject: true }, (subject, fileName, fileType) => {17 cy.fixture(fileName, 'base64')18 .then(Cypress.Blob.base64StringToBlob)19 .then(blob => {20 const testFile = new File([blob], fileName, { type: fileType })21 const dataTransfer = new DataTransfer()22 dataTransfer.items.add(testFile)23 })24})25Cypress.Commands.add('attachFile1', { prevSubject: true }, (subject, fileName, fileType) => {26 cy.fixture(fileName, 'base64')27 .then(Cypress.Blob.base64StringToBlob)28 .then(blob => {29 const testFile = new File([blob], fileName, { type: fileType })30 const dataTransfer = new DataTransfer()31 dataTransfer.items.add(testFile)32 })33})34Cypress.Commands.add('attachFile2', { prevSubject: true }, (subject, fileName, fileType) => {35 cy.fixture(fileName, 'base64')36 .then(Cypress.Blob.base64StringToBlob)37 .then(blob => {38 const testFile = new File([blob], fileName, { type: fileType })39 const dataTransfer = new DataTransfer()40 dataTransfer.items.add(testFile)41 })42})43Cypress.Commands.add('attachFile3', { prevSubject: true }, (subject, fileName,
Using AI Code Generation
1cy.get('#fileInput').attachFile('file.json', { subjectType: 'drag-n-drop' })2Cypress.Commands.add('attachFile', { prevSubject: 'element' }, (subject, fileName, options) => {3 .fixture(fileName, 'base64')4 .then(Cypress.Blob.base64StringToBlob)5 .then((blob) => {6 const testFile = new File([blob], fileName, { type: 'application/json' })7 const dataTransfer = new DataTransfer()8 dataTransfer.items.add(testFile)9 })10})11cy.fixture(fileName, 'base64').then(Cypress.Blob.base64StringToBlob)12Cypress.Commands.add('attachFile', { prevSubject: 'element' }, (subject, fileName, options) => {13 const testFile = new File([fileName], fileName, { type: 'application/json' })14 const dataTransfer = new DataTransfer()15 dataTransfer.items.add(testFile)16})
Using AI Code Generation
1describe('Test', () => {2 it('Test', () => {3 cy.get('.gLFyf').type('cypress')4 cy.get('.gNO89b').click()5 cy.get('.LC20lb.DKV0Md').click()6 cy.get('.gLFyf').type('cypress')7 cy.get('.gNO89b').click()8 cy.get('.LC20lb.DKV0Md').click()9 cy.get('.gLFyf').type('cypress')10 cy.get('.gNO89b').click()11 cy.get('.LC20lb.DKV0Md').click()12 cy.get('.gLFyf').type('cypress')13 cy.get('.gNO89b').click()14 cy.get('.LC20lb.DKV0Md').click()15 cy.get('.gLFyf').type('cypress')16 cy.get('.gNO89b').click()17 cy.get('.LC20lb.DKV0Md').click()18 cy.get('.gLFyf').type('cypress')19 cy.get('.gNO89b').click()20 cy.get('.LC20lb.DKV0Md').click()21 cy.get('.gLFyf').type('cypress')22 cy.get('.gNO89b').click()23 cy.get('.LC20lb.DKV0Md').click()24 cy.get('.gLFyf').type('cypress')25 cy.get('.gNO89b').click()26 cy.get('.LC20lb.DKV0Md').click()27 cy.get('.gLFyf').type('cypress')28 cy.get('.gNO89b').click()29 cy.get('.LC20lb.DKV0Md').click()30 cy.get('.gLFyf').type('cypress')31 cy.get('.gNO89b').click()32 cy.get('.LC20lb.DKV0Md').click()33 cy.get('.gLFyf').type('cypress')34 cy.get('.gNO89b').click()35 cy.get('.LC20lb.DKV0Md').click()36 cy.get('.gLFyf').type('cypress')37 cy.get('.gNO89b').click()38 cy.get('.LC20lb.DKV0Md').click()39 cy.get('.gLF
Using AI Code Generation
1const { mergeWithPreservedBuffers } = Cypress.Blob;2mergeWithPreservedBuffers([pdf1, pdf2])3.then((mergedPdf) => {4 fs.writeFile('merged.pdf', mergedPdf, (err) => {5 if (err) throw err;6 console.log('The file has been saved!');7 });8});
Using AI Code Generation
1const merged = Cypress.Buffer.mergeWithPreservedBuffers(2);3Cypress.Blob.binaryStringToBlob(merged).then((blob) => {4 const file = new File([blob], "merged.pdf", {5 });6 cy.get("input").attachFile(file);7});8Cypress.Commands.add("attachFile", { prevSubject: true }, (subject, file, options) => {9 return cy.window().then((win) => {10 const input = subject[0];11 const nameSegments = file.name.split(".");12 const name = nameSegments[0];13 const ext = nameSegments[1];14 cy.fixture(file, "base64").then((content) => {15 cy.log(content);16 const testFile = new win.File([content], name, { type: ext });17 const dataTransfer = new win.DataTransfer();18 dataTransfer.items.add(testFile);19 input.files = dataTransfer.files;20 return subject;21 });22 });23});24import "./commands";
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.
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- What is Cypress? -
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- 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.
YouTube
Watch this 3 hours of complete tutorial to learn the basics of Cypress and various Cypress commands with the Cypress testing at LambdaTest.
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