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How to use useValue method in testing-library-react-hooks
Best JavaScript code snippet using testing-library-react-hooks
request-resolver.spec.ts
Source:request-resolver.spec.ts 
1import {assert, use} from "chai";2import * as sinonChai from "sinon-chai";3import {spy, assert as assertSpy} from "sinon";4import {IResolvedRoute} from "../interfaces/iroute";5import {Methods, Router} from "../router/router";6import {uuid} from "../core";7import {EventEmitter} from "events";8import {Injector} from "../injector/injector";9import {HttpRequestResolver, RenderType} from "../server/request-resolver";10import {parse} from "url";11import {Logger} from "../logger/logger";12import {IResolvedModule, IModule} from "../interfaces/imodule";13import {Module} from "../decorators/module";14import {Controller} from "../decorators/controller";15import {Action} from "../decorators/action";16import {createModule, getModule} from "../server/bootstrap";17import {IProvider, IAfterConstruct} from "../interfaces/iprovider";18import {Metadata} from "../injector/metadata";19import {Inject} from "../decorators/inject";20import {setTimeout} from "timers";21// use chai spies22use(sinonChai);23describe("HttpRequestResolver", () => {24 let resolvedRoute: IResolvedRoute;25 let routeResolver: HttpRequestResolver;26 let request, response, data, id = uuid();27 beforeEach(() => {28 resolvedRoute = {29 method: Methods.GET,30 params: {31 a: 1,32 b: 233 },34 route: "core/index"35 };36 class ResponseEmitter extends EventEmitter {37 writeHead() {38 }39 write() {40 }41 end() {42 }43 invalid() {44 return 1;45 }46 }47 response = new ResponseEmitter();48 request = new ResponseEmitter();49 data = [new Buffer(1), new Buffer(1)];50 let injector = Injector.createAndResolveChild(51 new Injector(),52 HttpRequestResolver,53 [54 Logger,55 Router,56 {provide: "url", useValue: parse("/", true)},57 {provide: "UUID", useValue: id},58 {provide: "data", useValue: data},59 {provide: "contentType", useValue: "text/html"},60 {provide: "statusCode", useValue: 200},61 {provide: "request", useValue: request},62 {provide: "response", useValue: response},63 {provide: "modules", useValue: []},64 EventEmitter65 ]66 );67 routeResolver = injector.get(HttpRequestResolver);68 });69 it("Should initialize", () => {70 assert.isNotNull(routeResolver);71 });72 it("Should render", (done) => {73 let toRender = "RENDER";74 let aSpy = spy(response, "writeHead");75 let a2Spy = spy(response, "write");76 let a3Spy = spy(response, "end");77 let resolve = routeResolver.render(toRender, RenderType.DATA_HANDLER);78 resolve.then(rendered => {79 assertSpy.calledWith(aSpy, 200, {"Content-Type": "text/html"});80 assertSpy.calledWith(a2Spy, toRender);81 assertSpy.called(a3Spy);82 assert.equal(rendered, toRender);83 done();84 }).catch(done);85 });86 it("Should render throws error", (done) => {87 let resolve = routeResolver.render(Reflect.get(response, "invalid").call(), RenderType.DATA_HANDLER);88 resolve.catch(result => {89 assert.equal(result.message, "ResponseType must be string or buffer");90 }).then(done).catch(done);91 });92 it("Should getControllerProvider", () => {93 @Controller({94 name: "core"95 })96 class MyController {97 @Action("index")98 actionIndex() {99 }100 }101 @Module({102 name: "root",103 controllers: [MyController]104 })105 class MyModule {106 }107 let modules: Array<IModule> = createModule(MyModule);108 let module: IResolvedModule = {109 module: getModule(modules),110 endpoint: "core",111 action: "index",112 resolvedRoute,113 data114 };115 let provider = Metadata.verifyProvider(MyController);116 let controllerProvider: IProvider = HttpRequestResolver.getControllerProvider(module);117 assert.deepEqual(provider, controllerProvider);118 });119 it("Should getControllerProvider no route", () => {120 @Controller({121 name: "core"122 })123 class MyController {124 @Action("index")125 actionIndex() {126 }127 }128 @Module({129 name: "root",130 controllers: [MyController]131 })132 class MyModule {133 }134 let modules: Array<IModule> = createModule(MyModule);135 let module: IResolvedModule = {136 module: getModule(modules),137 endpoint: "test",138 action: "index",139 resolvedRoute,140 data141 };142 assert.throws(() => {143 HttpRequestResolver.getControllerProvider(module);144 }, "You must define controller within current route: core/index");145 });146 it("Should processModule", (done) => {147 let value = "MY_VALUE";148 @Controller({149 name: "core"150 })151 class MyController {152 @Action("index")153 actionIndex() {154 return value;155 }156 }157 @Module({158 name: "root",159 providers: [Logger, Router],160 controllers: [MyController]161 })162 class MyModule {163 }164 let modules: Array<IModule> = createModule(MyModule);165 let module: IResolvedModule = {166 module: getModule(modules),167 endpoint: "core",168 action: "index",169 resolvedRoute,170 data171 };172 Promise.resolve(routeResolver.processModule(module))173 .then(resolved => {174 assert.equal(resolved, value);175 done();176 }).catch(done);177 });178 it("Should process GET", (done) => {179 let value = "MY_VALUE";180 @Controller({181 name: "core"182 })183 class MyController {184 @Action("index")185 actionIndex() {186 return value;187 }188 }189 @Module({190 name: "root",191 providers: [Logger, Router],192 controllers: [MyController]193 })194 class MyModule implements IAfterConstruct {195 afterConstruct(): void {196 this.router.addRules([{197 methods: [Methods.GET],198 url: "/",199 route: "core/index"200 }]);201 }202 @Inject(Router)203 private router: Router;204 }205 request.method = "GET";206 request.url = "/";207 request.headers = {};208 let modules: Array<IModule> = createModule(MyModule);209 let injector = Injector.createAndResolveChild(210 getModule(modules).injector,211 HttpRequestResolver,212 [213 {provide: "url", useValue: parse("/", true)},214 {provide: "UUID", useValue: id},215 {provide: "data", useValue: data},216 {provide: "contentType", useValue: "text/html"},217 {provide: "statusCode", useValue: 200},218 {provide: "request", useValue: request},219 {provide: "response", useValue: response},220 {provide: "modules", useValue: modules},221 EventEmitter222 ]223 );224 let myRouteResolver = injector.get(HttpRequestResolver);225 let aSpy = spy(myRouteResolver, "render");226 Promise.resolve(myRouteResolver.process())227 .then(resolved => {228 assert.equal(resolved, value);229 assertSpy.calledWith(aSpy, value);230 done();231 }).catch(done);232 });233 it("Should process POST", (done) => {234 let value = "MY_VALUE";235 @Controller({236 name: "core"237 })238 class MyController {239 @Action("index")240 actionIndex() {241 return value;242 }243 }244 @Module({245 name: "root",246 providers: [Logger, Router],247 controllers: [MyController]248 })249 class MyModule implements IAfterConstruct {250 afterConstruct(): void {251 this.router.addRules([{252 methods: [Methods.POST],253 url: "/",254 route: "core/index"255 }]);256 }257 @Inject(Router)258 private router: Router;259 }260 request.method = "POST";261 request.url = "/";262 request.headers = {};263 let modules: Array<IModule> = createModule(MyModule);264 let injector = Injector.createAndResolveChild(265 getModule(modules).injector,266 HttpRequestResolver,267 [268 {provide: "url", useValue: parse("/", true)},269 {provide: "UUID", useValue: id},270 {provide: "data", useValue: []},271 {provide: "contentType", useValue: "text/html"},272 {provide: "statusCode", useValue: 200},273 {provide: "request", useValue: request},274 {provide: "response", useValue: response},275 {provide: "modules", useValue: modules},276 EventEmitter277 ]278 );279 let myRouteResolver = injector.get(HttpRequestResolver);280 let a = [Buffer.from("a"), Buffer.from("b"), Buffer.from("c")];281 // simulate async data processing282 setTimeout(() => {283 request.emit("data", a[0]);284 request.emit("data", a[1]);285 request.emit("data", a[2]);286 request.emit("end");287 }, 0);288 let aSpy = spy(myRouteResolver, "render");289 let bSpy = spy(myRouteResolver, "processModule");290 Promise.resolve(myRouteResolver.process())291 .then(resolved => {292 let module: IResolvedModule = {293 module: getModule(modules, "root"),294 endpoint: "core",295 action: "index",296 resolvedRoute: {297 method: Methods.POST,298 params: {},299 route: "core/index"300 },301 data: a302 };303 assert.equal(resolved, value);304 assertSpy.calledWith(aSpy, value);305 assertSpy.calledWith(bSpy, module);306 done();307 }).catch(done);308 });...
auth.module.ts
Source:auth.module.ts
1import { NgModule, ModuleWithProviders } from '@angular/core';2import { CommonModule } from '@angular/common';3import { AuthGuardService, AuthorizationsGuard, RootComponentGuard } from '../core/auth-guard.service';4import { UserStorageProvider } from '../core/services/user-storage';5import { GenericUndecoratedSerializaleSerializer } from '../../built-value/core/js/serializer';6import { AppUser, IAppUser } from '../contracts/v2/user/user';7import { IGenericSerializableBuilder, ISerializableBuilder } from '../../built-value/contracts';8import { AuthInterceptorService } from '../core/auth-interceptor.service';9import { HTTP_INTERCEPTORS } from '@angular/common/http';10import { DrewlabsV2LoginResultHandlerFunc } from '../../rxjs/operators';11import { MapToHandlerResponse } from '../../rxjs/types';121314export interface AuthServerConfigs {1516 host: string;17 loginPath: string;18 logoutPath: string;19 usersPath?: string;20 rolesPath?: string;21 authorizationsPath?: string;22 agencesPath?: string;23 departmentsPath?: string;24 companiesPath?: string;2526 //harry add27 rhhost: string;28 rhloginPath: string;293031}3233export interface AuthModuleConfigs {34 loginResponseHandler: MapToHandlerResponse<any>;35 serverConfigs?: AuthServerConfigs;36 userSerializer?: IGenericSerializableBuilder<IAppUser> | ISerializableBuilder<IAppUser>;37}38@NgModule({39 imports: [40 CommonModule41 ]42})43export class AuthModule {44 static forRoot(config?: AuthModuleConfigs): ModuleWithProviders<AuthModule> {45 return {46 ngModule: AuthModule,47 providers: [48 {49 provide: 'USER_SERIALIZER',50 useValue: config ? config.userSerializer || (new GenericUndecoratedSerializaleSerializer<AppUser>())51 : (new GenericUndecoratedSerializaleSerializer<AppUser>())52 },53 { provide: HTTP_INTERCEPTORS, useClass: AuthInterceptorService, multi: true },54 RootComponentGuard,55 AuthGuardService,56 UserStorageProvider,57 AuthorizationsGuard,58 {59 provide: 'LOGIN_RESPONSE_HANDLER_FUNC',60 useValue: config.loginResponseHandler || DrewlabsV2LoginResultHandlerFunc61 },62 {63 provide: 'AUTH_SERVER_HOST',64 useValue: config?.serverConfigs?.host || null65 },66 67 {68 provide: 'AUTH_LOGIN_PATH',69 useValue: config?.serverConfigs?.loginPath || 'auth/login'70 },71 {72 provide: 'AUTH_LOGOUT_PATH',73 useValue: config?.serverConfigs?.logoutPath || 'auth/logout'74 },75 {76 provide: 'AUTH_USERS_RESOURCE_PATH',77 useValue: config?.serverConfigs?.usersPath || 'admin/users'78 },79 {80 provide: 'AUTH_ROLES_RESOURCE_PATH',81 useValue: config?.serverConfigs?.rolesPath || 'admin/roles'82 },83 {84 provide: 'AUTH_AUTHORIZATIONS_RESOURCE_PATH',85 useValue: config?.serverConfigs?.authorizationsPath || 'admin/authorizations'86 },87 {88 provide: 'AUTH_DEPARTMENTS_RESOURCE_PATH',89 useValue: config?.serverConfigs?.departmentsPath || 'admin/departments'90 },91 {92 provide: 'AUTH_COMPANIES_RESOURCE_PATH',93 useValue: config?.serverConfigs?.companiesPath || 'admin/companies'94 },95 {96 provide: 'AUTH_AGENCES_RESOURCE_PATH',97 useValue: config?.serverConfigs?.agencesPath || 'admin/companies'98 },99 //harry add100 {101 provide: 'AUTH_RH_SERVER_HOST',102 useValue: config?.serverConfigs?.rhhost || null103 },104 {105 provide: 'AUTH_RH_LOGIN_PATH',106 useValue: config?.serverConfigs?.rhloginPath || 'auth/login'107 },108 ],109 };110 }
...
jobs.providers.ts
Source:jobs.providers.ts
1import { FUNCTION_REPOSITORY, INDUSTRY_REPOSITORY, JOBS_REPOSITORY, JOB_APPLICATION_REPOSITORY, JOB_FUNCTION_REPOSITORY, JOB_INDUSTRY_REPOSITORY, JOB_LOCATION_REPOSITORY, JOB_QUALIFICATION_REPOSITORY, LOCATION_REPOSITORY, QUALIFICATION_REPOSITORY } from "../constants";2import { FunctionM, Industry, JobApplication, JobPost, JobPostFunction, JobPostIndustry, JobPostLocation, JobPostQualification, Location, Qualification } from "./jobs.entity";3export const jobProviders = [4 {5 provide: JOBS_REPOSITORY,6 useValue: JobPost,7 },8 {9 provide: QUALIFICATION_REPOSITORY,10 useValue: Qualification,11 },12 {13 provide: FUNCTION_REPOSITORY,14 useValue: FunctionM,15 },16 {17 provide: INDUSTRY_REPOSITORY,18 useValue: Industry,19 },20 {21 provide: JOB_QUALIFICATION_REPOSITORY,22 useValue: JobPostQualification,23 },24 {25 provide: JOB_FUNCTION_REPOSITORY,26 useValue: JobPostFunction,27 },28 {29 provide: JOB_INDUSTRY_REPOSITORY,30 useValue: JobPostIndustry,31 },32 {33 provide: LOCATION_REPOSITORY,34 useValue: Location,35 },36 {37 provide: JOB_LOCATION_REPOSITORY,38 useValue: JobPostLocation,39 },40 {41 provide: JOB_APPLICATION_REPOSITORY,42 useValue: JobApplication,43 }...
providers.ts
Source:providers.ts
1import { Provider } from 'ims-core';2import * as tokens from 'ims-tokens';3import { promises } from 'fs';4import { EventEmitter } from 'events';5export default [6 {7 provide: tokens.Express,8 useValue: require('express'),9 },10 {11 provide: tokens.ServeStatic,12 useValue: require('serve-static'),13 },14 {15 provide: tokens.Assert,16 useValue: require('assert'),17 },18 {19 provide: tokens.Schedule,20 useValue: require('node-schedule'),21 },22 {23 provide: tokens.LoggerFactory,24 useValue: require('log4js'),25 },26 {27 provide: tokens.Debug,28 useValue: require('debug'),29 },30 {31 provide: tokens.FsmEvent,32 useValue: require('fsm-event'),33 },34 {35 provide: tokens.Fs,36 useValue: promises,37 },38 {39 provide: tokens.Webpack,40 useValue: require('webpack'),41 },42 {43 provide: tokens.EventEmitter,44 useValue: EventEmitter,45 },46 {47 provide: tokens.Path,48 useValue: require('path'),49 },50 {51 provide: tokens.Process,52 useValue: process,53 },54 {55 provide: tokens.Dirname,56 useValue: __dirname,57 },58 {59 provide: tokens.Filename,60 useValue: __filename,61 },62 {63 provide: tokens.Util,64 useValue: require('util'),65 },66 {67 provide: tokens.Fetch,68 useValue: require('node-fetch'),69 },...
Using AI Code Generation
1import { renderHook, act } from '@testing-library/react-hooks';2import { useCounter } from './useCounter';3test('should increment counter', () => {4 const { result } = renderHook(() => useCounter());5 act(() => {6 result.current.increment();7 });8 expect(result.current.count).toBe(1);9});10import { useState } from 'react';11export const useCounter = () => {12 const [count, setCount] = useState(0);13 const increment = () => setCount(count + 1);14 return {15 };16};
Using AI Code Generation
1import { renderHook, act } from '@testing-library/react-hooks';2import { useCounter } from './useCounter';3it('should increment counter', () => {4 const { result } = renderHook(() => useCounter());5 act(() => {6 result.current.increment();7 });8 expect(result.current.count).toBe(1);9});10import { renderHook, act } from '@testing-library/react-hooks';11import { useCounter } from './useCounter';12it('should increment counter', () => {13 const { result } = renderHook(() => useCounter());14 act(() => {15 result.current.increment();16 });17 expect(result.current.count).toBe(2);18});19import { useState } from 'react';20export const useCounter = () => {21 const [count, setCount] = useState(0);22 const increment = () => {23 setCount(count + 1);24 };25 return { count, increment };26};27import { renderHook, act } from '@testing-library/react-hooks';28import { useCounter } from './useCounter';29it('should increment counter', () => {30 const { result } = renderHook(() => useCounter());31 act(() => {32 result.current.increment();33 });34 expect(result.current.count).toBe(1);35});36import { renderHook, act } from '@testing-library/react-hooks';37import { useCounter } from './useCounter';38it('should increment counter', () => {39 const { result } = renderHook(() => useCounter());40 act(()
Using AI Code Generation
1import { renderHook, act } from '@testing-library/react-hooks';2import useCounter from '../useCounter';3describe('useCounter', () => {4 it('should increment counter', () => {5 const { result } = renderHook(() => useCounter());6 act(() => {7 result.current.increment();8 });9 expect(result.current.count).toBe(1);10 });11});12import { useState } from 'react';13const useCounter = () => {14 const [count, setCount] = useState(0);15 const increment = () => setCount(count + 1);16 return {17 };18};19export default useCounter;20import useCounter from './useCounter';21describe('useCounter', () => {22 it('should increment counter', () => {23 const { result } = renderHook(() => useCounter());24 act(() => {25 result.current.increment();26 });27 expect(result.current.count).toBe(1);28 });29});30import { useState } from 'react';31const useCounter = () => {32 const [count, setCount] = useState(0);33 const increment = () => setCount(count + 1);34 return {35 };36};37export default useCounter;38import useCounter from './useCounter';39describe('useCounter', () => {40 it('should increment counter', () => {41 const { result } = renderHook(() => useCounter());42 act(() => {43 result.current.increment();44 });45 expect(result.current.count).toBe(1);46 });47});48import { useState } from 'react';49const useCounter = () => {50 const [count, setCount] = useState(0);51 const increment = () => setCount(count + 1);52 return {53 };54};55export default useCounter;56import useCounter from './useCounter';57describe('useCounter', () => {58 it('should increment counter', () => {59 const { result } = renderHook(() => useCounter());60 act(() => {61 result.current.increment();62 });63 expect(result.current.count).toBe(1);64 });65});66import { useState
Using AI Code Generation
1import { renderHook } from '@testing-library/react-hooks';2import { useCounter } from './useCounter';3import { act } from 'react-dom/test-utils';4test('should increment counter', () => {5 const { result } = renderHook(() => useCounter());6 act(() => {7 result.current.increment();8 });9 expect(result.current.count).toBe(1);10});11import { useState } from 'react';12export const useCounter = (initialCount = 0) => {13 const [count, setCount] = useState(initialCount);14 const increment = () => {15 setCount(count + 1);16 };17 return {18 };19};20import { renderHook } from '@testing-library/react-hooks';21import { useCounter } from './useCounter';22import { act } from 'react-dom/test-utils';23test('should increment counter', () => {24 const { result } = renderHook(() => useCounter());25 act(() => {26 result.current.increment();27 });28 expect(result.current.count).toBe(1);29});30import { useState } from 'react';31export const useCounter = (initialCount = 0) => {32 const [count, setCount] = useState(initialCount);33 const increment = () => {34 setCount(count + 1);35 };36 return {37 };38};39import { renderHook } from '@testing-library/react-hooks';40import { useCounter } from './useCounter';41import { act } from 'react-dom/test-utils';42test('should increment counter', () => {43 const { result } = renderHook(() => useCounter());44 act(() => {45 result.current.increment();46 });47 expect(result.current.count).toBe(1);48});49import { useState } from 'react';50export const useCounter = (initialCount = 0) => {51 const [count, setCount] = useState(initialCount);52 const increment = () => {53 setCount(count + 1);54 };55 return {56 };57};
Using AI Code Generation
1import React from 'react';2import { renderHook } from '@testing-library/react-hooks';3import { useFetch } from './useFetch';4test('should fetch without error', async () => {5 const { result, waitForNextUpdate } = renderHook(() =>6 );7 expect(result.current.loading).toBe(true);8 expect(result.current.data).toBe(null);9 expect(result.current.error).toBe(null);10 await waitForNextUpdate();11 expect(result.current.loading).toBe(false);12 expect(result.current.data).not.toBe(null);13 expect(result.current.error).toBe(null);14});15import { useState, useEffect } from 'react';16export const useFetch = url => {17 const [data, setData] = useState(null);18 const [loading, setLoading] = useState(true);19 const [error, setError] = useState(null);20 useEffect(() => {21 const fetchData = async () => {22 try {23 const response = await fetch(url);24 const json = await response.json();25 setData(json);26 } catch (error) {27 setError(error);28 } finally {29 setLoading(false);30 }31 };32 fetchData();33 }, [url]);34 return { data, loading, error };35};36import React from 'react';37import { renderHook } from '@testing-library/react-hooks';38import { useFetch } from './useFetch';39test('should fetch without error', async () => {40 const { result, waitForNextUpdate } = renderHook(() =>41 );42 expect(result.current).toMatchInlineSnapshot(`43 Object {44 }45 `);46 await waitForNextUpdate();47 expect(result.current).toMatchInlineSnapshot(`48 Object {49 Object {
Using AI Code Generation
1import { renderHook } from '@testing-library/react-hooks';2import useCounter from './useCounter';3import { act } from 'react-dom/test-utils';4test('should increment counter', () => {5 const { result } = renderHook(() => useCounter());6 act(() => {7 result.current.increment();8 });9 expect(result.current.count).toBe(1);10});11import { useState } from 'react';12const useCounter = () => {13 const [count, setCount] = useState(0);14 const increment = () => setCount(count + 1);15 return { count, increment };16};17export default useCounter;
Using AI Code Generation
1import { renderHook } from "@testing-library/react-hooks";2import { useFetch } from "./useFetch";3describe("useFetch hook", () => {4 it("should return default value", () => {5 const { result } = renderHook(() => useFetch());6 expect(result.current).toEqual([[], false]);7 });8 it("should return data and loading is true", () => {9 const { result } = renderHook(() => useFetch());10 expect(result.current).toEqual([[], false]);11 });12});13import { useState, useEffect } from "react";14export const useFetch = () => {15 const [data, setData] = useState([]);16 const [loading, setLoading] = useState(false);17 useEffect(() => {18 setLoading(true);19 .then((response) => response.json())20 .then((json) => {21 setData(json);22 setLoading(false);23 });24 }, []);25 return [data, loading];26};27import { useFetch } from "./useFetch";28export default function App() {29 const [data, loading] = useFetch();30 return (31 {loading ? (32 ) : (33 data.map((item, index) => {34 return (35 <div key={index}>36 <h2>{item.title}</h2>
Using AI Code Generation
1import { renderHook } from "@testing-library/react-hooks";2import { useCounter } from "./useCounter";3test("should use value of 0", () => {4 const { result } = renderHook(() => useCounter(0));5 expect(result.current.count).toBe(0);6});7import { renderHook } from "@testing-library/react-hooks";8import { useCounter } from "./useCounter";9test("should use value of 5", () => {10 const { result } = renderHook(() => useCounter(5));11 expect(result.current.count).toBe(5);12});13import { useState } from "react";14export const useCounter = (initialCount) => {15 const [count, setCount] = useState(initialCount);16 const increment = () => setCount(count + 1);17 const decrement = () => setCount(count - 1);18 return { count, increment, decrement };19};20import React from "react";21import { useCounter } from "./useCounter";22function App() {23 const { count, increment, decrement } = useCounter(10);24 return (25 <h1>Counter: {count}</h1>26 <button onClick={increment}>+</button>27 <button onClick={decrement}>-</button>28 );29}30export default App;31import React from "react";32import ReactDOM from "react-dom";33import App from "./App";34import "./index.css";35ReactDOM.render(<App />, document.getElementById("root"));36import "@testing-library/jest-dom/extend-expect";37import "@testing-library/react/cleanup-after-each";38{39 "dependencies": {40 },41 "devDependencies": {
Using AI Code Generation
1import { renderHook, act } from '@testing-library/react-hooks';2import useCounter from './useCounter';3test('useCounter increments counter', () => {4 const { result } = renderHook(() => useCounter());5 act(() => {6 result.current.increment();7 });8 expect(result.current.count).toBe(1);9});10import { useState } from 'react';11export default function useCounter() {12 const [count, setCount] = useState(0);13 const increment = () => {14 setCount(count + 1);15 };16 return {17 };18}19import { useEffect } from 'react';20export default function useDocumentTitle(title) {21 useEffect(() => {22 document.title = title;23 });24}
Using AI Code Generation
1import { renderHook } from '@testing-library/react-hooks'2import useFetch from '../hooks/useFetch'3import { act } from 'react-dom/test-utils'4import { waitFor } from '@testing-library/react'5describe('useFetch', () => {6 it('should return the default value', () => {7 const { result } = renderHook(() => useFetch())8 expect(result.current).toEqual({9 })10 })11 it('should return the data', async () => {12 const { result, waitForNextUpdate } = renderHook(() => useFetch())13 act(() => {14 result.current.fetchData('/api/endpoint')15 })16 await waitForNextUpdate()17 expect(result.current).toEqual({18 data: {19 },20 })21 })22 it('should return an error', async () => {23 const { result, waitForNextUpdate } = renderHook(() => useFetch())24 act(() => {25 result.current.fetchData('/api/endpoint')26 })27 await waitForNextUpdate()28 expect(result.current).toEqual({29 })30 })31})32import { renderHook } from '@testing-library/react-hooks'33import useFetch from '../hooks/useFetch'34import { act } from 'react-dom/test-utils'35import { waitFor } from '@testing-library/react'36jest.mock('axios', () => {37 return {38 get: jest.fn().mockImplementationOnce(() => {39 return Promise.resolve({40 data: {41 },42 })43 }),44 }45})46describe('useFetch', () => {47 it('should return the default value', () => {48 const { result } = renderHook(() => useFetch())49 expect(result.current).toEqual({50 })51 })52 it('should return the data', async () => {53 const { result, waitForNextUpdate } = renderHook(() => useFetch())54 act(() => {55 result.current.fetchData('/api/endpoint')56 })57 await waitForNextUpdate()58 expect(result
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