How to use rejectValue method in jest-extended

Best JavaScript code snippet using jest-extended

TruePromise.ts

Source:TruePromise.ts Github

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1/**2 *3 * TruePromise is a an overhaul of the javascript class Promise. [Learn how to use Promises](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise).4 *5 *6 * TruePromise is meant to be used with TypeScript.7 *8 * _TruePromise works with async/await syntax in a nodeJS environnement. ⚠️ Not tested in a commonJS environnement._9 *10 * - Do not throw error if not handled.11 * - Allow delayed calling of then/catch.12 * - Correctly type the value in reject cases.13 * - Rework of the static methods with better types.14 * - New timeout() static method.15 *16 * The main purpose of a Promise is to handle a script that can be accepted (resolved), or refused (rejected). For each case, it case send a value.17 * TruePromise is used the same way as javascript Promise. Some returned value may change in static methods.18 * All methods offer documentation while hovering them in your IDE. Most of them are taken from [Mozilla's Promise documentation](https://developer.mozilla.org/fr/docs/Web/JavaScript/Reference/Global_Objects/Promise).19 */20export class TruePromise<ResolveValue = void, RejectValue = void> {21 // "pending": waiting for resolve or reject. "resolved" resolve was called. "rejected" was called. "finished" thenFunction or catchFunction was called.22 private _state: "pending" | "resolved" | "rejected" | "finished";23 private resolveValue?: ResolveValue;24 private rejectValue?: RejectValue;25 private resolveCallback?: (value: ResolveValue) => void;26 private rejectCallback?: (value: RejectValue) => void;27 //////////////////////////////////////////////////////////////////////////////////////////////28 // CONSTRUCTOR ///////////////////////////////////////////////////////////////////////////////29 //////////////////////////////////////////////////////////////////////////////////////////////30 constructor(31 executor: (32 resolve: (value: ResolveValue) => void,33 reject: (value: RejectValue) => void,34 ) => void35 ) {36 // Declare the promise as "pending".37 this._state = "pending";38 // Call the executor function39 executor(this._resolve, this._reject);40 // Return this to chain41 return this42 }43 get state() {44 return this._state45 }46 ////////////////////////////////////////////////////////////////////////////////////////////////////////47 // PRIVATE METHODS /////////////////////////////////////////////////////////////////////////////////////48 ///////////////////////////////////////////////////////////////////////////////////////////////////////49 /**50 * Method given to the executor51 * @param value52 * @see constructor53 */54 public _resolve = (value: ResolveValue) => {55 if(this._state === "pending") {56 this._state = "resolved";57 this.resolveValue = value;58 if(this.resolveCallback) {59 this.resolveCallback(this.resolveValue);60 this._state = "finished";61 }62 }63 }64 /**65 * Method given to the executor66 * @param value67 * @see constructor68 */69 public _reject = (value: RejectValue) => {70 if(this._state === "pending") {71 this._state = "rejected";72 this.rejectValue = value;73 if(this.rejectCallback) {74 this.rejectCallback(this.rejectValue);75 this._state = "finished";76 }77 }78 }79 ///////////////////////////////////////////////////////////////////////////////////////////////////80 // PUBLIC METHODS /////////////////////////////////////////////////////////////////////////////////81 ///////////////////////////////////////////////////////////////////////////////////////////////////82 /**83 * The catch() method returns a the promise and deals with rejected cases only.84 *85 * @param onReject Function called when the promise is rejected.86 * @returns the promise itself.87 */88 public catch = (onReject: (value: RejectValue) => void) => {89 this.rejectCallback = onReject;90 // If the promise was already rejected when catch() is called, rejectCallback is called and the promise is declared finished91 if(this._state === "rejected") {92 this.rejectCallback(<RejectValue>this.rejectValue);93 this._state = "finished";94 }95 return this;96 }97 /**98 * The finally() method returns a Promise. When the promise is settled, i.e either resolved or rejected, the specified callback function is executed. This provides a way for code to be run whether the promise was resolved successfully or rejected once the Promise has been dealt with. This helps to avoid duplicating code in both the promise's then() and catch() handlers.99 *100 * @param onResolveOrReject function called when the promised is resolved or rejected.101 * @returns the promise itself.102 */103 public finally = (onResolveOrReject: (value: ResolveValue| RejectValue) => void) => {104 return this.then(onResolveOrReject).catch(onResolveOrReject);105 }106 /**107 * The then() method returns a Promise. It takes up to two arguments: callback functions for the success and failure cases of the Promise.108 *109 * @param onResolve Function called when the promise is resolved.110 * @param onReject optional. Function called when the promise is rejected.111 * @returns the promise itself.112 */113 public then = (onResolve: (value: ResolveValue) => void, onReject?: (value: RejectValue) => void) => {114 this.resolveCallback = onResolve;115 // If the promise was already resolved when then() is called, resolveCallback is called and the promise is declared finished116 if(this._state === "resolved") {117 this.resolveCallback(<ResolveValue>this.resolveValue);118 this._state = "finished";119 }120 // Is a second callback is given, this.catch() is called121 if(onReject) {122 return this.catch(onReject);123 }124 return this;125 }126 ////////////////////////////////////////////////////////////////////////////////////////////////////127 // STATIC METHODS //////////////////////////////////////////////////////////////////////////////////128 ////////////////////////////////////////////////////////////////////////////////////////////////////129 /**130 * The Promise.all() method takes an iterable of promises as an input, and returns a single Promise that resolves to an array of the results of the input promises, in the same order. This returned promise will resolve when all of the input's promises have resolved, or if the input iterable contains no promises. It rejects immediately upon any of the input promises rejecting, and will reject with this first value as {value, index: index of the rejected promise}.131 * @param promises Array of promises.132 * @returns a new TruePromise.133 */134 static all = <ResolveValue = any, RejectValue = undefined>(promises: (TruePromise<ResolveValue, RejectValue> | Promise<ResolveValue>)[]) => {135 return new TruePromise<ResolveValue[], {value: RejectValue, index: number}>((resolve, reject) => {136 if(promises.length === 0) return resolve([]);137 // array containing all resolved values from the promises138 const resolveValues: ResolveValue[] = [];139 // amount of promises that have been resolved140 let resolvedPromisesAmount = 0;141 // all() script state. "Pending" means the promises are still processing. "Finished" means either all promised have been resolved or one have been rejected.142 let state: "pending" | "finished" = "pending";143 /**144 * Add a resolved value to the resolved values array.145 */146 const addResolveValue = (value: ResolveValue, index: number) => {147 resolveValues[index] = value;148 resolvedPromisesAmount++;149 // If all promises have been resolved and the script is not finished, the main promise is resolved.150 if(resolvedPromisesAmount === promises.length && state === "pending") {151 state = "finished";152 resolve(resolveValues);153 }154 }155 /**156 * Reject and finish the promise157 */158 const rejectMainPromise = (value: RejectValue, index: number) => {159 if(state === "pending") {160 state = "finished";161 reject({value, index})162 }163 }164 // Check all promise165 promises.forEach((promise, index) => {166 promise167 // add the resolved value to the array168 .then((value) => addResolveValue(value, index))169 // reject the whole promise if one promise is rejected170 .catch((value) => rejectMainPromise(value, index))171 })172 })173 }174 /**175 * The Promise.allSettled() method returns a promise that resolves after all of the given promises have either resolved or rejected, with an array of objects that each describes the outcome of each promise. It is typically used when you have multiple asynchronous tasks that are not dependent on one another to complete successfully, or you'd always like to know the result of each promise. In comparison, the Promise returned by Promise.all() may be more appropriate if the tasks are dependent on each other / if you'd like to immediately reject upon any of them rejecting.176 * @param promises Array of promises.177 * @returns a new TruePromise.178 */179 static allSettled = <ResolveValue = void, RejectValue = void>(promises: (TruePromise<ResolveValue, RejectValue> | Promise<ResolveValue>)[]) => {180 return new TruePromise<{value: ResolveValue | RejectValue, status: "resolved" | "rejected"}[], void>((resolve, reject) => {181 if(promises.length === 0) return resolve([]);182 // array containing all values from the promises183 const values: {value: ResolveValue | RejectValue, status: "resolved" | "rejected"}[] = [];184 // amount of promises that have been resolved185 let resolvedPromisesAmount = 0;186 // allSettled() script state. "Pending" means the promises are still processing. "Finished" means either all promised have been resolved or one have been rejected.187 let state: "pending" | "finished" = "pending";188 /**189 * Add a resolved value to the resolved values array.190 */191 const addResolveValue = (value: ResolveValue, promiseState: "resolved" | "rejected", index: number) => {192 values[index] = {value, status: promiseState};193 resolvedPromisesAmount++;194 // If all promises have been resolved and the script is not finished, the main promise is resolved.195 if(resolvedPromisesAmount === promises.length && state === "pending") {196 state = "finished";197 resolve(values);198 }199 }200 // Check all promise201 promises.forEach((promise, index) => {202 promise203 // add the resolved value to the array204 .then((value) => addResolveValue(value, "resolved", index))205 // add the rejected value to the array206 .catch((value) => addResolveValue(value, "rejected", index))207 })208 })209 }210 /**211 * Promise.any() takes an array of Promises and, as soon as one of the promises in the array fulfills, returns a single promise that resolves with the value from that promise. If no promises in the array fulfill (if all of the given promises are rejected), then the returned promise is rejected with all the rejected values from the promise, in the same order.212 * @param promises Array of promises.213 * @returns a new TruePromise.214 */215 static any = <ResolveValue = undefined, RejectValue = any>(promises: (TruePromise<ResolveValue, RejectValue> | Promise<ResolveValue>)[]) => {216 return new TruePromise<{value: ResolveValue, index: number}, RejectValue[]>((resolve, reject) => {217 if(promises.length === 0) return reject([]);218 // array containing all resolved values from the promises219 const rejectedValues: RejectValue[] = [];220 // amount of promises that have been resolved221 let rejectedPromisesAmount = 0;222 // any() script state. "Pending" means the promises are still processing. "Finished" means either all promised have been resolved or one have been rejected.223 let state: "pending" | "finished" = "pending";224 /**225 * Add a rejected value to the rejected values array.226 */227 const addRejectedValue = (value: RejectValue, index: number) => {228 rejectedValues[index] = value;229 rejectedPromisesAmount++;230 // If all promises have been rejected and the script is not finished, the main promise is rejected.231 if(rejectedPromisesAmount === promises.length && state === "pending") {232 state = "finished";233 reject(rejectedValues);234 }235 }236 /**237 * Resolve and finish the promise238 */239 const resolveMainPromise = (value: ResolveValue, index: number) => {240 if(state === "pending") {241 state = "finished";242 resolve({value, index})243 }244 }245 // Check all promise246 promises.forEach((promise, index) => {247 promise248 // add the resolved value to the array249 .then((value) => resolveMainPromise(value, index))250 // reject the whole promise if one promise is rejected251 .catch((value) => addRejectedValue(value, index))252 })253 })254 }255 /**256 * The Promise.race() method returns a promise that fulfills or rejects as soon as one of the promises in an iterable fulfills or rejects, with the value from that promise and index of it.257 * @param promises Array of promises.258 * @returns a new TruePromise.259 */260 static race = <ResolveValue = void, RejectValue = void>(promises: (TruePromise<ResolveValue, RejectValue> | Promise<ResolveValue>)[]) => {261 return new TruePromise<{value: ResolveValue, index: number}, {value: RejectValue, index: number}>((resolve, reject) => {262 // race() script state. "Pending" means the promises are still processing. "Finished" means either all promised have been resolved or one have been rejected.263 let state: "pending" | "finished" = "pending";264 /**265 * Resolve and finish the promise266 */267 const resolveMainPromise = (value: ResolveValue, index: number) => {268 if(state === "pending") {269 state = "finished";270 resolve({value, index})271 }272 }273 /**274 * Reject and finish the promise275 */276 const rejectMainPromise = (value: RejectValue, index: number) => {277 if(state === "pending") {278 state = "finished";279 reject({value, index})280 }281 }282 // Check all promise283 promises.forEach((promise, index) => {284 promise285 // add the resolved value to the array286 .then((value) => resolveMainPromise(value, index))287 // reject the whole promise if one promise is rejected288 .catch((value) => rejectMainPromise(value, index))289 })290 })291 }292 /**293 * The Promise.reject() method returns a Promise object that is rejected with a given value.294 * @param promises Array of promises.295 * @returns a new TruePromise that immediatly reject.296 */297 static reject = <RejectValue = void>(rejectValue: RejectValue) => {298 return new TruePromise<void, RejectValue>((_resolve, reject) => reject(rejectValue));299 }300 /**301 * The Promise.resolve() method returns a Promise object that is resolved with a given value.302 * @param promises Array of promises.303 * @returns a new TruePromise that immediatly resolve.304 */305 static resolve = <ResolveValue = void>(resolveValue: ResolveValue) => {306 return new TruePromise<ResolveValue, void>((resolve, _reject) => resolve(resolveValue));307 }308 /**309 * The Promise.timeout() method returns a Promise object that resolves when the given promise is resolved, and rejects when the given promise is rejected or when the given timeout is up.310 * @param promises Array of promises.311 * @returns a new TruePromise that immediatly resolve.312 */313 static timeout = <ResolveValue = void, RejectValue = void>(314 executor: (315 resolve: (value: ResolveValue) => void,316 reject: (value: RejectValue) => void317 ) => void,318 timeout: number) => {319 return new TruePromise<ResolveValue, RejectValue | "timeout">((resolve, reject) => {320 new TruePromise<ResolveValue, RejectValue>(executor)321 .then(resolve)322 .catch(reject);323 setTimeout(() => reject("timeout"), timeout);324 });325 }...

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ARMDataProviderHelpers.ts

Source:ARMDataProviderHelpers.ts Github

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1import { IARMDataProvider } from '../../src/scripts/shared/data-provider/ARMDataProvider';2/**3 * Mock ARM data provider that always returns a promise that resolves with resolveValue parameter 4 * @param resolveValue the value that you want the returned promise to resolve with5 */6export class AlwaysSucceedingARMDataProvider implements IARMDataProvider {7 private resolveValue: any;8 /**9 * @param resolveValue the value that you want the returned promise to resolve with10 */11 constructor(resolveValue: any) {12 this.resolveValue = resolveValue;13 }14 15 public executePost(uri: string, timeoutMs: number, data?: string, headers?: StringMap<string>): Promise<any> {16 return new Promise((resolve, reject) => resolve(this.resolveValue));17 }18 public executeGet(uri: string, timeoutMs: number, headers?: StringMap<string>): Promise<any> {19 return new Promise((resolve, reject) => resolve(this.resolveValue));20 }21}22/**23 * Mock ARM data provider that always returns a promise that rejects with rejectValue parameter24 * @param rejectValue the value that you want the returned promise to reject with25 */26export class AlwaysFailingARMDataProvider implements IARMDataProvider {27 private rejectValue: any;28 /**29 * @param rejectValue the value that you want the returned promise to reject with30 */31 constructor(rejectValue: any) {32 this.rejectValue = rejectValue;33 }34 public executePost(uri: string, timeoutMs: number, data?: string, headers?: StringMap<string>): Promise<any> {35 return new Promise((resolve, reject) => reject(this.rejectValue));36 }37 public executeGet(uri: string, timeoutMs: number, headers?: StringMap<string>): Promise<any> {38 return new Promise((resolve, reject) => reject(this.rejectValue));39 }40}41/**42 * Mock ARM data provider that fails x times, before succeeding thereafter43 * @param resolveValue the value you want your promise to resolve to44 * @param rejectValue the value you want your promise to reject with45 * @param numTimesToFail the number of times the mock ARM data provider is supposed to fail, before finally succeeding46 */47export class FailThenSucceedARMDataProvider implements IARMDataProvider {48 private numTimesToFail: number;49 private numFailures: number;50 private resolveValue: any;51 private rejectValue: any;52 /**53 * @param resolveValue the value you want your promise to resolve to54 * @param rejectValue the value you want your promise to reject with55 * @param numTimesToFail the number of times the mock ARM data provider is supposed to fail, before finally succeeding56 */57 constructor(resolveValue: any, rejectValue: any, numTimesToFail?: number) {58 this.resolveValue = resolveValue;59 this.rejectValue = rejectValue;60 this.numTimesToFail = numTimesToFail || 0;61 this.numFailures = 0;62 }63 public executePost(uri: string, timeoutMs: number, data?: string, headers?: StringMap<string>): Promise<any> {64 if (this.numFailures < this.numTimesToFail) {65 this.numFailures++;66 return new Promise((resolve, reject) => reject(this.rejectValue));67 } else {68 return new Promise((resolve, reject) => resolve(this.resolveValue)); 69 }70 }71 public executeGet(uri: string, timeoutMs: number, headers?: StringMap<string>): Promise<any> {72 if (this.numFailures < this.numTimesToFail) {73 this.numFailures++;74 return new Promise((resolve, reject) => reject(this.rejectValue));75 } else {76 return new Promise((resolve, reject) => resolve(this.resolveValue)); 77 }78 }79 /**80 * @return returns the number of times that executePost has failed81 */82 public getNumFailures(): number {83 return this.numFailures;84 }85}86/**87 * Mock ARM data provider that succeeds once before failing thereafter88 * @param resolveValue the value you want your promise to resolve to89 * @param rejectValue the value you want your promise to reject with90 */91export class SucceedThenFailARMDataProvider implements IARMDataProvider {92 private resolveValue: any;93 private rejectValue: any;94 private hasSucceededOnce: boolean;95 private numFailures: number;96 /**97 * @param resolveValue the value you want your promise to resolve to98 * @param rejectValue the value you want your promise to reject with99 */100 constructor(resolveValue: any, rejectValue: any) {101 this.resolveValue = resolveValue;102 this.rejectValue = rejectValue;103 this.hasSucceededOnce = false;104 this.numFailures = 0;105 }106 public executePost(uri: string, timeoutMs: number, data?: string, headers?: StringMap<string>): Promise<any> {107 if (!this.hasSucceededOnce) {108 return new Promise((resolve, reject) => resolve(this.resolveValue)); 109 } else {110 this.numFailures++;111 return new Promise((resolve, reject) => reject(this.rejectValue));112 }113 }114 public executeGet(uri: string, timeoutMs: number, headers?: StringMap<string>): Promise<any> {115 if (!this.hasSucceededOnce) {116 return new Promise((resolve, reject) => resolve(this.resolveValue)); 117 } else {118 this.numFailures++;119 return new Promise((resolve, reject) => reject(this.rejectValue));120 }121 }122 /**123 * @return returns the number of times that executePost has failed124 */125 public getNumFailures(): number {126 return this.numFailures;127 }...

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MockHttpDataProviders.ts

Source:MockHttpDataProviders.ts Github

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1import { HttpVerb, IHttpDataProvider, IHttpRequestContent } from '../../../src/scripts/shared/data-provider/v2/HttpDataProvider';2/**3 * Logs all requests made4 */5export class LoggingHttpDataProvider implements IHttpDataProvider {6 private log: any[];7 constructor() {8 this.log = [];9 }10 public executeRequest(11 verb: HttpVerb,12 url: string, 13 timeoutMs: number,14 headers?: StringMap<string>,15 content?: IHttpRequestContent,16 ): Promise<any> {17 this.log.push({verb, url, timeoutMs, headers, content});18 return Promise.resolve();19 }20 public getLog(): any[] {21 return this.log;22 }23 public reset(): void {24 this.log = [];25 }26}27/**28 * Mock data provider that always returns a promise that resolves with resolveValue parameter 29 */30export class AlwaysSucceedingHttpDataProvider implements IHttpDataProvider {31 private resolveValue: any;32 constructor(resolveValue: any) {33 this.resolveValue = resolveValue;34 }35 36 public executeRequest(37 verb: HttpVerb, 38 url: string, 39 timeoutMs: number, 40 headers?: StringMap<string>, 41 content?: IHttpRequestContent42 ): Promise<any> {43 return Promise.resolve(this.resolveValue);44 }45}46/**47 * Mock data provider that always returns a promise that rejects with rejectValue parameter48 */49export class AlwaysFailingHttpDataProvider implements IHttpDataProvider {50 private rejectValue: any;51 constructor(rejectValue: any) {52 this.rejectValue = rejectValue;53 }54 public executeRequest(55 verb: HttpVerb, 56 url: string, 57 timeoutMs: number, 58 headers?: StringMap<string>, 59 content?: IHttpRequestContent60 ): Promise<any> {61 return Promise.reject(this.rejectValue);62 }63}64/**65 * Mock data provider that fails x times, before succeeding thereafter66 */67export class FailThenSucceedHttpDataProvider implements IHttpDataProvider {68 private numTimesToFail: number;69 private numFailures: number;70 private resolveValue: any;71 private rejectValue: any;72 constructor(resolveValue: any, rejectValue: any, numTimesToFail?: number) {73 this.resolveValue = resolveValue;74 this.rejectValue = rejectValue;75 this.numTimesToFail = numTimesToFail || 0;76 this.numFailures = 0;77 }78 public executeRequest(79 verb: HttpVerb, 80 url: string, 81 timeoutMs: number, 82 headers?: StringMap<string>, 83 content?: IHttpRequestContent84 ): Promise<any> {85 if (this.numFailures < this.numTimesToFail) {86 this.numFailures++;87 return Promise.reject(this.rejectValue);88 } else {89 return Promise.resolve(this.resolveValue);90 }91 }92 public getNumFailures(): number {93 return this.numFailures;94 }95}96/**97 * Mock data provider that succeeds once before failing thereafter98 */99export class SucceedThenFailHttpDataProvider implements IHttpDataProvider {100 private resolveValue: any;101 private rejectValue: any;102 private hasSucceededOnce: boolean;103 private numFailures: number;104 constructor(resolveValue: any, rejectValue: any) {105 this.resolveValue = resolveValue;106 this.rejectValue = rejectValue;107 this.hasSucceededOnce = false;108 this.numFailures = 0;109 }110 public executeRequest(111 verb: HttpVerb, 112 url: string, 113 timeoutMs: number, 114 headers?: StringMap<string>, 115 content?: IHttpRequestContent116 ): Promise<any> {117 if (!this.hasSucceededOnce) {118 return Promise.resolve(this.resolveValue);119 } else {120 this.numFailures++;121 return Promise.reject(this.rejectValue);122 }123 }124 public getNumFailures(): number {125 return this.numFailures;126 }...

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1const { toBeValid } = require("jest-json-schema");2expect.extend({ toBeValid });3const schema = {4 properties: {5 name: {6 },7 },8};9const data = {10};11expect(data).not.toBeValid(schema, {12});13expect(data).not.toBeValid(schema);14expect(data).toBeValid(schema);15expect(data).toBeValid(schema, {16});17expect(data).toBeValid(schema, {18});19expect(data).toBeValid(schema, {20});21expect(data).toBeValid(schema, {22});23expect(data).toBeValid(schema, {24});25expect(data).toBeValid(schema, {26});27expect(data).toBeValid(schema, {28});

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1expect.extend({2 toBeValid(received, options) {3 const pass = received === expected;4 ? () =>5 this.utils.matcherHint('toBeValid', undefined, undefined, options) +6 `Expected: not ${this.utils.printExpected(expected)}\n` +7 `Received: ${this.utils.printReceived(received)}`8 : () =>9 this.utils.matcherHint('toBeValid', undefined, undefined, options) +10 `Expected: ${this.utils.printExpected(expected)}\n` +11 `Received: ${this.utils.printReceived(received)}`;12 return { message, pass };13 },14});15describe('test', () => {16 it('should be valid', () => {17 expect('test').toBeValid();18 });19});

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1const { rejectValue } = require('jest-extended');2test("rejectValue", () => {3 expect(() => {4 rejectValue(1, 1);5 }).toThrowErrorMatchingSnapshot();6});7`;8const { rejectValue } = require('jest-extended');9test("rejectValue", () => {10 expect(() => {11 rejectValue(1, 2);12 }).toThrowErrorMatchingSnapshot();13});14`;15const { rejectValue } = require('jest-extended');16test("rejectValue", () => {17 expect(() => {18 rejectValue(1, 1, "message");19 }).toThrowErrorMatchingSnapshot();20});21`;22const { rejectValue } = require('jest-extended');23test("rejectValue", () => {24 expect(() => {25 rejectValue(1, 2, "message");26 }).toThrowErrorMatchingSnapshot();27});28`;29const { rejectValue } = require('jest-extended');30test("rejectValue", () => {31 expect(() => {32 rejectValue(1, 2, "message", {a: 1});33 }).toThrowErrorMatchingSnapshot();34});35{36}]37`;38const { rejectValue } = require('jest-extended');39test("rejectValue", () => {

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1describe('Testing rejectValue method', () => {2 it('should return true', () => {3 expect([1, 2, 3]).rejectValue(2);4 });5});6describe('Testing rejectValue method', () => {7 it('should return true', () => {8 expect([1, 2, 3]).rejectValue(2);9 });10});11describe('Testing rejectObject method', () => {12 it('should return true', () => {13 expect([{ a: 1 }, { a: 2 }, { a: 3 }]).rejectObject({ a: 2 });14 });15});16describe('Testing rejectObject method', () => {17 it('should return true', () => {18 expect([{ a: 1 }, { a: 2 }, { a: 3 }]).rejectObject({ a: 2 });19 });20});21describe('Testing rejectObjectContaining method', () => {22 it('should return true', () => {23 expect([{ a: 1 }, { a: 2 }, { a: 3 }]).rejectObjectContaining({ a: 2 });24 });25});26describe('Testing rejectObjectContaining method', () => {27 it('should return true', () => {28 expect([{ a: 1 }, { a: 2 }, { a: 3 }]).rejectObjectContaining({ a: 2 });29 });30});31describe('Testing rejectObjectLike method', () => {32 it('should return true', () => {33 expect([{ a: 1 }, { a: 2 }, { a: 3 }]).rejectObjectLike({ a: 2 });34 });35});36describe('Testing rejectObjectLike method', () => {37 it('should return true', () => {38 expect([{ a: 1 }, { a: 2 }, { a: 3 }]).rejectObjectLike({ a: 2 });39 });40});

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1describe('test', () => {2 it('should test', () => {3 expect(() => {4 throw new Error('error');5 }).rejectValue('error');6 });7});8const { toBeEven, toBeOdd } = require('jest-extended');9expect.extend({ toBeEven, toBeOdd });10test('two plus two is four', () => {11 expect(2 + 2).toBe(4);12});13test('two plus two is not six', () => {14 expect(2 + 2).not.toBe(6);15});16test('two plus two is even', () => {17 expect(2 + 2).toBeEven();18});19test('three plus three is odd', () => {20 expect(3 + 3).toBeOdd();21});22### `.toBeEmpty()`23test('passes when given an empty string', () => {24 expect('').toBeEmpty();25});26test('passes when given an empty array', () => {27 expect([]).toBeEmpty();28});29test('passes when given an empty object', () => {30 expect({}).toBeEmpty();31});32test('fails when given a non-empty string', () => {33 expect('hello').not.toBeEmpty();34});35test('fails when given a non-empty array', () => {36 expect([1, 2, 3]).not.toBeEmpty();37});38test('fails when given a non-empty object', () => {39 expect({ a: 1, b: 2 }).not.toBeEmpty();40});41### `.toBeEven()`42test('passes when given an even number', () => {43 expect(4).toBeEven();44});45test('fails when given an odd number', () => {46 expect(3).not.toBeEven();47});48### `.toBeFalse()`49test('passes when given false', () => {50 expect(false).toBeFalse();51});52test('fails when given true', () => {53 expect(true).not.toBeFalse();54});

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1const {rejects} = require('assert');2const {rejectValue} = require('jest-extended');3test('rejects with value', () => {4 const p = Promise.reject(3);5 return expect(p).rejectValue(3);6});7test('rejects with value', () => {8 const p = Promise.reject(3);9 return expect(p).rejectValue(3);10});11test('rejects with value', () => {12 const p = Promise.reject(3);13 return expect(p).rejectValue(3);14});15test('rejects with value', () => {16 const p = Promise.reject(3);17 return expect(p).rejectValue(3);18});19test('rejects with value', () => {20 const p = Promise.reject(3);21 return expect(p).rejectValue(3);22});23test('rejects with value', () => {24 const p = Promise.reject(3);25 return expect(p).rejectValue(3);26});27test('rejects with value', () => {28 const p = Promise.reject(3);29 return expect(p).rejectValue(3);30});31test('rejects with value', () => {32 const p = Promise.reject(3);33 return expect(p).rejectValue(3);34});35test('rejects with value', () => {36 const p = Promise.reject(3);37 return expect(p).rejectValue(3);38});39test('rejects with value', () => {40 const p = Promise.reject(3);41 return expect(p).rejectValue(3);42});

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1const { rejectValue } = require('jest-extended');2describe('test rejectValue', () => {3 it('should return a promise that rejects with the given value', () => {4 return expect(rejectValue('foo')).rejects.toEqual('foo');5 });6});

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1describe("Testing the rejectValue method", () => {2 test("rejectValue should reject the value", () => {3 expect([1, 2, 3]).not.toRejectValue(1);4 });5});6rejectValue should reject the value (2 ms)

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Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.

LambdaTest Learning Hubs:

YouTube

You could also refer to video tutorials over LambdaTest YouTube channel to get step by step demonstration from industry experts.

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