How to use isErrorLike method in Cypress

Best JavaScript code snippet using cypress

promises.js

Source:promises.js Github

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...63}64function hasRejectionToWarn() {65 return tickInfo[kHasRejectionToWarn] === 1;66}67function isErrorLike(o) {68 return typeof o === 'object' &&69 o !== null &&70 ObjectPrototypeHasOwnProperty(o, 'stack');71}72function getUnhandledRejectionsMode() {73 const { getOptionValue } = require('internal/options');74 switch (getOptionValue('--unhandled-rejections')) {75 case 'none':76 return kIgnoreUnhandledRejections;77 case 'warn':78 return kAlwaysWarnUnhandledRejections;79 case 'strict':80 return kStrictUnhandledRejections;81 case 'throw':82 return kThrowUnhandledRejections;83 case 'warn-with-error-code':84 return kWarnWithErrorCodeUnhandledRejections;85 default:86 return kThrowUnhandledRejections;87 }88}89function promiseRejectHandler(type, promise, reason) {90 if (unhandledRejectionsMode === undefined) {91 unhandledRejectionsMode = getUnhandledRejectionsMode();92 }93 switch (type) {94 case kPromiseRejectWithNoHandler:95 unhandledRejection(promise, reason);96 break;97 case kPromiseHandlerAddedAfterReject:98 handledRejection(promise);99 break;100 case kPromiseResolveAfterResolved:101 resolveError('resolve', promise, reason);102 break;103 case kPromiseRejectAfterResolved:104 resolveError('reject', promise, reason);105 break;106 }107}108function resolveError(type, promise, reason) {109 // We have to wrap this in a next tick. Otherwise the error could be caught by110 // the executed promise.111 process.nextTick(() => {112 process.emit('multipleResolves', type, promise, reason);113 });114}115function unhandledRejection(promise, reason) {116 const emit = (reason, promise, promiseInfo) => {117 if (promiseInfo.domain) {118 return promiseInfo.domain.emit('error', reason);119 }120 return process.emit('unhandledRejection', reason, promise);121 };122 maybeUnhandledPromises.set(promise, {123 reason,124 uid: ++lastPromiseId,125 warned: false,126 domain: process.domain,127 emit128 });129 // This causes the promise to be referenced at least for one tick.130 ArrayPrototypePush(pendingUnhandledRejections, promise);131 setHasRejectionToWarn(true);132}133function handledRejection(promise) {134 const promiseInfo = maybeUnhandledPromises.get(promise);135 if (promiseInfo !== undefined) {136 maybeUnhandledPromises.delete(promise);137 if (promiseInfo.warned) {138 const { uid } = promiseInfo;139 // Generate the warning object early to get a good stack trace.140 // eslint-disable-next-line no-restricted-syntax141 const warning = new Error('Promise rejection was handled ' +142 `asynchronously (rejection id: ${uid})`);143 warning.name = 'PromiseRejectionHandledWarning';144 warning.id = uid;145 ArrayPrototypePush(asyncHandledRejections, { promise, warning });146 setHasRejectionToWarn(true);147 return;148 }149 }150 if (maybeUnhandledPromises.size === 0 && asyncHandledRejections.length === 0)151 setHasRejectionToWarn(false);152}153const unhandledRejectionErrName = 'UnhandledPromiseRejectionWarning';154function emitUnhandledRejectionWarning(uid, reason) {155 const warning = getErrorWithoutStack(156 unhandledRejectionErrName,157 'Unhandled promise rejection. This error originated either by ' +158 'throwing inside of an async function without a catch block, ' +159 'or by rejecting a promise which was not handled with .catch(). ' +160 'To terminate the node process on unhandled promise ' +161 'rejection, use the CLI flag `--unhandled-rejections=strict` (see ' +162 'https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). ' +163 `(rejection id: ${uid})`164 );165 try {166 if (isErrorLike(reason)) {167 warning.stack = reason.stack;168 process.emitWarning(reason.stack, unhandledRejectionErrName);169 } else {170 process.emitWarning(171 noSideEffectsToString(reason), unhandledRejectionErrName);172 }173 } catch {174 try {175 process.emitWarning(176 noSideEffectsToString(reason), unhandledRejectionErrName);177 } catch {178 // Ignore.179 }180 }181 process.emitWarning(warning);182}183// If this method returns true, we've executed user code or triggered184// a warning to be emitted which requires the microtask and next tick185// queues to be drained again.186function processPromiseRejections() {187 let maybeScheduledTicksOrMicrotasks = asyncHandledRejections.length > 0;188 while (asyncHandledRejections.length > 0) {189 const { promise, warning } = ArrayPrototypeShift(asyncHandledRejections);190 if (!process.emit('rejectionHandled', promise)) {191 process.emitWarning(warning);192 }193 }194 let len = pendingUnhandledRejections.length;195 while (len--) {196 const promise = ArrayPrototypeShift(pendingUnhandledRejections);197 const promiseInfo = maybeUnhandledPromises.get(promise);198 if (promiseInfo === undefined) {199 continue;200 }201 promiseInfo.warned = true;202 const { reason, uid, emit } = promiseInfo;203 let needPop = true;204 const {205 [kAsyncIdSymbol]: promiseAsyncId,206 [kTriggerAsyncIdSymbol]: promiseTriggerAsyncId,207 } = promise;208 // We need to check if async_hooks are enabled209 // don't use enabledHooksExist as a Promise could210 // come from a vm.* context and not have an async id211 if (typeof promiseAsyncId !== 'undefined') {212 pushAsyncContext(213 promiseAsyncId,214 promiseTriggerAsyncId,215 promise216 );217 }218 try {219 switch (unhandledRejectionsMode) {220 case kStrictUnhandledRejections: {221 const err = isErrorLike(reason) ?222 reason : generateUnhandledRejectionError(reason);223 // This destroys the async stack, don't clear it after224 triggerUncaughtException(err, true /* fromPromise */);225 if (typeof promiseAsyncId !== 'undefined') {226 pushAsyncContext(227 promise[kAsyncIdSymbol],228 promise[kTriggerAsyncIdSymbol],229 promise230 );231 }232 const handled = emit(reason, promise, promiseInfo);233 if (!handled) emitUnhandledRejectionWarning(uid, reason);234 break;235 }236 case kIgnoreUnhandledRejections: {237 emit(reason, promise, promiseInfo);238 break;239 }240 case kAlwaysWarnUnhandledRejections: {241 emit(reason, promise, promiseInfo);242 emitUnhandledRejectionWarning(uid, reason);243 break;244 }245 case kThrowUnhandledRejections: {246 const handled = emit(reason, promise, promiseInfo);247 if (!handled) {248 const err = isErrorLike(reason) ?249 reason : generateUnhandledRejectionError(reason);250 // This destroys the async stack, don't clear it after251 triggerUncaughtException(err, true /* fromPromise */);252 needPop = false;253 }254 break;255 }256 case kWarnWithErrorCodeUnhandledRejections: {257 const handled = emit(reason, promise, promiseInfo);258 if (!handled) {259 emitUnhandledRejectionWarning(uid, reason);260 process.exitCode = 1;261 }262 break;...

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test.js

Source:test.js Github

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...165 });166});167describe("isErrorLike", () => {168 it("should check internal Errors", () => {169 assert(isErrorLike(new Error("something went wrong")));170 assert(isErrorLike(new EvalError("something went wrong")));171 assert(isErrorLike(new RangeError("something went wrong")));172 assert(isErrorLike(new RangeError("something went wrong")));173 assert(isErrorLike(new ReferenceError("something went wrong")));174 assert(isErrorLike(new SyntaxError("something went wrong")));175 assert(isErrorLike(new TypeError("something went wrong")));176 assert(isErrorLike(new URIError("something went wrong")));177 assert(isErrorLike(new assert.AssertionError({ message: "something went wrong" })));178 });179 it("should check an Error derivative", () => {180 class MyError extends Error { }181 assert(isErrorLike(new MyError("something went wrong")));182 });183 it("should check an error-like object", () => {184 let err = { name: "CustomError", message: "something went wrong" };185 Error.captureStackTrace(err);186 assert(isErrorLike(err));187 });188});189describe("isPromiseLike", () => {190 it("should check a Promise", () => {191 assert(isPromiseLike(Promise.resolve(123)));192 });193 it("should check promise-like objects", () => {194 assert(isPromiseLike({ then() { } }));195 assert(isPromiseLike({ then: () => { } }));196 assert(!isPromiseLike({ then: 123 }));197 });198});199describe("isObjectIdLike", () => {200 class ObjectId { }...

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actions.js

Source:actions.js Github

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...165// try {166// const response = await api.putLike(slug);167// if (response.ok) {168// dispatch(isLiked(true))169// dispatch(isErrorLike(false))170// }171// // dispatch(isEdited(fullArticle.actions))172// } catch (e) {173// dispatch(isLiked(false));174// dispatch(isErrorLike(true));175// // добавить уведомление об ошибке176// }177// }178//179// export const deleteLike = (slug) => async (dispatch) => {180//181// try {182// const response = await api.deleteLike(slug);183// if (response.ok) {184// dispatch(isLikeDelete(true));185// // dispatch(isLiked(false));186// dispatch(isErrorLike(false))187// }188// } catch (e) {189// dispatch(isLikeDelete(false));190// dispatch(isErrorLike(true));191// // добавить уведомление об ошибке192// }...

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assert.js

Source:assert.js Github

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...12 status = null;13 if (args.length === 3) {14 ([ status, err, props ] = args);15 assert(isStatus(status), new TypeError('Expected first argument to be a HTTP status'));16 assert(isErrorLike(err), new TypeError('Expected second argument to be a string or Error'));17 assert(isObject(props), new TypeError('Expected third argument to be an object'));18 } else if (args.length === 2 && typeof args[0] === 'number') {19 ([ status, err ] = args);20 assert(isStatus(status), new TypeError('Expected first argument to be a HTTP status'));21 assert(isErrorLike(err), new TypeError('Expected second argument to be a string or Error'));22 } else if (args.length === 2 && isErrorLike(args[0])) {23 ([ err, props ] = args);24 assert(isErrorLike(err), new TypeError('Expected second argument to be a string or Error'));25 assert(isObject(props), new TypeError('Expected third argument to be an object'));26 status = (isStatus(err.status) ? err.status : undefined) ||27 (isStatus(err.statusCode) ? err.statusCode : undefined) ||28 (isStatus(props.status) ? props.status : undefined) ||29 (isStatus(props.statusCode) ? props.statusCode : undefined) ||30 null;31 } else if (args.length === 1 && typeof args[0] === 'number') {32 ([ status ] = args);33 assert(isStatus(status), new TypeError('Expected argument to be a HTTP status'));34 err = `HTTP ${status} - ${statuses[`${status}`]}`;35 } else if (args.length === 1 && isErrorLike(args[0])) {36 ([ err ] = args);37 } else if (args.length === 1 && isObject(args[0])) {38 ([ props ] = args);39 status = (isStatus(props.status) ? props.status : undefined) ||40 (isStatus(props.statusCode) ? props.statusCode : undefined) ||41 null;42 err = (typeof props.message === 'string' ? props.message : undefined) ||43 (typeof props.error === 'string' ? props.error : undefined) ||44 err;45 } else if (args.length === 0) {46 // Just default to "An error occurred"47 } else {48 throw new TypeError('Invalid arguments passed to http-assert-plus');49 }...

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articles-list.js

Source:articles-list.js Github

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1import React, {useEffect} from "react";2import Article from "../article";3import {useDispatch, useSelector} from "react-redux";4import Loader from "../loader";5import {notification, Pagination} from "antd";6import styles from "../../styles/pagination.module.scss";7import {fetchDispatch, setCurrentPage} from "../../redux/actions/articles";8import {isLiked, isLikeDelete} from "../../redux/actions/likes";9import {useNavigate} from "react-router-dom";10const ArticlesList = () => {11 const dispatch = useDispatch();12 const articlesList = useSelector(state => state.articles.articlesData); // массив со всеми статьями13 const newResponse = articlesList.map(el => ({...el, id: el.slug})) // с уникальным айди14 const loading = useSelector(state => state.articles.isLoading)15 const isErrorLike = useSelector(state => state.likes.isError);16 const totalCount = useSelector(state => state.articles.totalCount);17 const currentPage = useSelector(state => state.articles.currentPage) // по дефолту 118 const isToken = JSON.parse(localStorage.getItem('token')) !== null;19 const statusLike = useSelector(state => state.likes.isLike);20 const statusUnLike = useSelector(state => state.likes.isUnlike);21 useEffect( () => {22 dispatch(fetchDispatch(5, currentPage, dispatch))23 if (statusLike || statusUnLike) {24 dispatch(isLiked(null))25 } if (statusLike === false || statusUnLike === false) {26 dispatch(isLikeDelete(null));27 }28 if (isErrorLike) {29 openWarning('warning', 'try refreshing page');30 dispatch(isLikeDelete(null));31 }32 }, [currentPage, statusLike, statusUnLike, isToken, isErrorLike])33 const openWarning = (type, description) => {34 notification[type]({35 message: 'Error',36 description: description37 })38 }39 const loader = loading ? <Loader /> : null;40 const article = newResponse.map(el => { // возвращается массив с артиклями41 return (42 <Article43 key={el.id}44 id={el.slug}45 title={el.title}46 info={el.description}47 date={el.createdAt}48 tag={el.tagList}49 num={el.favoritesCount}50 fav={el.favorited}51 profile={el.author.username}52 avatar={el.author.image}53 />54 )55 })56 const updatePage = async (curr) => {57 dispatch(setCurrentPage(curr))58 }59 return (60 <div>61 {loader}62 {article}63 <Pagination size="small"64 onChange={updatePage}65 className={styles['pagination-list']}66 current={currentPage}67 total={totalCount}/>68 </div>69 )70}...

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examples.js

Source:examples.js Github

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...42// returns true;43objToTest = { message: "My Error", name: "Error" };44result = JsTypeCommander_1.JsTypeCommander.derivesFrom(objToTest, Error);45// returns false;46// function isErrorLike(obj?: TDefined): obj is ErrorLike47objToTest = new Error("My Error");48result = JsTypeCommander_1.JsTypeCommander.isErrorLike(objToTest);49// returns true;50objToTest = new RangeError();51result = JsTypeCommander_1.JsTypeCommander.isErrorLike(objToTest);52// returns true;53objToTest = { message: "My Error" };54result = JsTypeCommander_1.JsTypeCommander.isErrorLike(objToTest);55// returns true;56objToTest = { message: "My Error", number: true };57result = JsTypeCommander_1.JsTypeCommander.isErrorLike(objToTest);...

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likes.js

Source:likes.js Github

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...13 const response = await api.putLike(slug);14 if (response.ok) {15 dispatch(isLiked(true));16 dispatch(isLikeDelete(false));17 dispatch(isErrorLike(false));18 }19 } catch (e) {20 dispatch(isLiked(false));21 dispatch(isErrorLike(true));22 }23}24export const deleteLike = (slug) => async (dispatch) => {25 try {26 const response = await api.deleteLike(slug);27 if (response.ok) {28 dispatch(isLikeDelete(true));29 dispatch(isLiked(false));30 dispatch(isErrorLike(false))31 }32 } catch (e) {33 dispatch(isLikeDelete(false));34 dispatch(isErrorLike(true));35 }...

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argsToComponents.js

Source:argsToComponents.js Github

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...5*/6module.exports = function argsToComponents (args) {7 args = [].slice.apply(args)8 var lastArg = args[args.length - 1]9 var isError = lastArg instanceof Error || isErrorLike(lastArg)10 var isMetadata = !isError && lastArg && typeof lastArg === 'object'11 var messageParts = isError || isMetadata ? args.slice(0, -1) : args12 var message = messageParts.join(' ')13 // Handle log.debug({ foo: 'bar' })14 if (isMetadata && !message) {15 message = 'metadata:'16 }17 // Handle log.debug(new Error())18 if (isError && !message) {19 message = lastArg.message20 }21 var components = {22 message: message23 }...

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Using AI Code Generation

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1it('should display error message', () => {2 cy.on('uncaught:exception', (err, runnable) => {3 })4 cy.get('input').type('test')5 cy.get('button').click()6 cy.get('.error').should('be.visible')7 cy.get('.error').should('contain', 'Error')8 cy.get('.error').should('contain', 'test')9 cy.get('.error').should(isErrorLike)10})11Cypress.Commands.add('isErrorLike', { prevSubject: true }, (subject) => {12 expect(subject).to.have.property('name', 'Error')13 expect(subject).to.have.property('message')14 expect(subject).to.have.property('stack')15})16import './commands'17Cypress.on('uncaught:exception', (err, runnable) => {18})

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Using AI Code Generation

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1describe('My First Test', function() {2 it('Does not do much!', function() {3 expect(true).to.equal(true)4 })5})6describe('My First Test', function() {7 it('Does not do much!', function() {8 expect(true).to.equal(true)9 })10})11describe('My First Test', function() {12 it('Does not do much!', function() {13 expect(true).to.equal(true)14 })15})16describe('My First Test', function() {17 it('Does not do much!', function() {18 expect(true).to.equal(true)19 })20})21describe('My First Test', function() {22 it('Does not do much!', function() {23 expect(true).to.equal(true)24 })25})26describe('My First Test', function() {27 it('Does not do much!', function() {28 expect(true).to.equal(true)29 })30})31describe('My First Test', function() {32 it('Does not do much!', function() {33 expect(true).to.equal(true)34 })35})36describe('My First Test', function() {37 it('Does not do much!', function() {38 expect(true).to.equal(true)39 })40})41describe('My First Test', function() {42 it('Does not do much!', function() {43 expect(true).to.equal(true)44 })45})46describe('My First Test', function() {47 it('Does not do much!', function() {48 expect(true).to.equal(true)49 })50})51describe('My First Test', function() {52 it('Does not do much!', function() {53 expect(true).to.equal(true)54 })55})56describe('My First Test', function() {57 it('Does not do much!', function() {58 expect(true).to.equal(true)59 })60})61describe('My First Test', function

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Using AI Code Generation

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1describe('My First Test', function() {2 it('Does not do much!', function() {3 expect(true).to.equal(true)4 })5 it('Throws an error', function() {6 expect(true).to.throw('foo')7 })8})

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Using AI Code Generation

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1describe('test', () => {2 it('test', () => {3 cy.get('input[name="q"]').type('cypress')4 cy.get('input[name="btnK"]').click()5 cy.get('#resultStats').should('be.visible')6 cy.get('#resultStats').then(($element) => {7 const text = $element.text()8 expect(text).to.be.an('string')9 expect(text).to.include('About')10 })11 })12})13This error occurs when the cy.then() method is used and the callback function is not called within the specified time limit. This error can be resolved by increasing the timeout

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Using AI Code Generation

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1describe('test', () => {2 it('test', () => {3 cy.get('#query-btn').click();4 cy.get('#query-btn').should('not.exist');5 });6});7Cypress.Commands.add('isErrorLike', (err, like) => {8 if (err instanceof like) return true;9 if (err.name === like.name) return true;10 if (err.message === like.message) return true;11 return false;12});

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Using AI Code Generation

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1it('should throw an error', function(){2 expect({name: 'John', age: 20}).to.be.an('object');3 expect({name: 'John', age: 20}).to.be.an('array');4 expect({name: 'John', age: 20}).to.be.an('string');5 expect({name: 'John', age: 20}).to.be.an('number');6});

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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:

  1. What is Cypress? -
  2. Why Cypress? - Learn why Cypress might be a good choice for testing your web applications.
  3. Features of Cypress Testing - Learn about features that make Cypress a powerful and flexible tool for testing web applications.
  4. Cypress Drawbacks - Although Cypress has many strengths, it has a few limitations that you should be aware of.
  5. 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.
  6. Browsers Supported by Cypress - Cypress is built on top of the Electron browser, supporting all modern web browsers. Learn browsers that support Cypress.
  7. Selenium vs Cypress: A Detailed Comparison - Compare and explore some key differences in terms of their design and features.
  8. 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.
  9. 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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