How to use restoreConsole method in testing-library-react-hooks

Best JavaScript code snippet using testing-library-react-hooks

index.js

Source:index.js Github

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...94 // expect(global.console.warn).toHaveBeenCalledWith("blaaaa");95 expect(global.console.warn).toHaveBeenCalledTimes(2);96 expect(global.console.warn).toHaveBeenCalledWith("docco: have a template but no stylesheet file specified.");97 expect(global.console.warn).toHaveBeenCalledWith("docco: could not load layout template \"foo.jst\"");98 restoreConsole();99 });100});101describe("Format", () => {102 it("exports expected api", () => {103 expect(format.format).toEqual(format.default);104 });105 it("runs without erroring", () => {106 expect(format.format).not.toThrow();107 const result = format.format();108 expect(result).toBeType("array");109 expect(result.length).toBe(0);110 });111 it("processes sections correctly", () => {112 marked.mockImplementationOnce((text) => `<p>${text}</p>`);113 const sections = [114 {codeText: "foo", docsText: "bar"}115 ];116 const result = format.format("test.js", sections);117 expect(result).toBeType("array");118 expect(result.length).toBe(1);119 expect(result[0]).toMatchObject({120 codeText: "foo",121 docsText: "bar",122 codeHtml: "<div class=\"highlight\"><pre>foo</pre></div>",123 docsHtml: "<p>bar</p>"124 });125 marked.mockClear();126 });127 it("handles exceptions correctly", () => {128 highlight.highlight.mockImplementationOnce(() => {129 throw new Error("splode");130 });131 marked.mockImplementation((text) => `<p>${text}</p>`);132 const sections = [133 {codeText: "foo", docsText: "bar"}134 ];135 expect(() => format.format("test.js", sections)).not.toThrow();136 const result = format.format("test.js", sections);137 expect(result).toBeType("array");138 expect(result.length).toBe(1);139 highlight.highlight.mockImplementationOnce(() => {140 throw new Error("splode");141 });142 expect(() => format.format("test.js", sections, {throw: true})).toThrow();143 marked.mockClear();144 highlight.highlight.mockClear();145 });146 it("sets markdown highlighter correctly", () => {147 const restoreConsole = mockConsole("warn");148 let options, result;149 marked.setOptions.mockImplementation((opts) => {150 options = opts;151 });152 const sections = [153 {codeText: "foo", docsText: "bar"}154 ];155 highlight.getLanguage.mockImplementationOnce(() => {156 return false;157 });158 format.format("test.js", sections);159 expect(options).toBeType("object");160 expect(options.highlight).toBeType("function");161 result = options.highlight("foo");162 expect(result).toBe("foo");163 expect(global.console.warn).toHaveBeenCalledTimes(1);164 global.console.warn.mockClear();165 highlight.highlight.mockClear();166 highlight.getLanguage.mockClear();167 highlight.getLanguage.mockImplementationOnce(() => {168 return true;169 });170 highlight.highlight.mockImplementation((_lang, _code) => {171 return {value: "bar"};172 });173 format.format("test.js", sections);174 expect(options).toBeType("object");175 expect(options.highlight).toBeType("function");176 result = options.highlight("foo");177 expect(result).toBe("bar");178 expect(global.console.warn).not.toHaveBeenCalled();179 highlight.highlight.mockClear();180 highlight.getLanguage.mockClear();181 restoreConsole();182 });183});184describe("Parse", () => {185 it("has the correct default export", () => {186 expect(parse.parse).toEqual(parse.default);187 });188});189describe("CLI", () => {190 it("has the correct default export", () => {191 expect(cli.cli).toEqual(cli.default);192 });193 it("logs output correctly for no arguments", () => {194 const restoreConsole = mockConsole();195 commander.args = [];196 cli.cli();197 expect(global.console.log).toHaveBeenCalledTimes(2);198 expect(commander.version).toHaveBeenCalledTimes(1);199 expect(commander.usage).toHaveBeenCalledTimes(1);200 expect(commander.parse).toHaveBeenCalledTimes(1);201 expect(commander.option).toHaveBeenCalledTimes(11);202 expect(commander.helpInformation).toHaveBeenCalledTimes(1);203 commander.clearMocks();204 restoreConsole();205 });206 it("calls the provided generate function when called with arguments", () => {207 const restoreConsole = mockConsole();208 const test = jest.fn();209 commander.args = ["dummy", "data"];210 cli.cli(commander.args, test);211 expect(global.console.log).toHaveBeenCalledTimes(1);212 expect(test).toHaveBeenCalledTimes(1);213 expect(commander.version).toHaveBeenCalledTimes(1);214 expect(commander.usage).toHaveBeenCalledTimes(1);215 expect(commander.parse).toHaveBeenCalledTimes(1);216 expect(commander.option).toHaveBeenCalledTimes(11);217 expect(commander.helpInformation).not.toHaveBeenCalled();218 commander.clearMocks();219 restoreConsole();220 });221 it("can read a languages file", () => {222 fs.readFileSync.mockClear();223 cli.readLanguages("foo.json");224 expect(fs.readFileSync).toHaveBeenCalledTimes(1);225 });226});227describe("Languages", () => {228 it("has the correct exports", () => {229 expect(languages.default).toBeUndefined();230 expect(languages.languages).toBeDefined();231 expect(languages.languages).toBeType("object");232 expect(languages.getLanguage).toBeDefined();233 expect(languages.getLanguage).toBeType("function");234 });235 it("can get a language based on extension", () => {236 const lang = languages.getLanguage("foo.js");237 expect(lang).toBeType("object");238 expect(lang.name).toBe("javascript");239 expect(lang).toMatchObject({240 name: expect.any(String),241 symbol: expect.any(String),242 commentMatcher: expect.any(RegExp),243 commentFilter: expect.any(RegExp)244 });245 });246 it("can be passed a custom language config", () => {247 const lang = languages.getLanguage("foo.bar", {248 languages: {249 ".bar": {"name": "qux"}250 }251 });252 expect(lang.name).toBe("qux");253 });254 it("can detect literate versions of code correctly", () => {255 let lang = languages.getLanguage("foo.js.md", {256 languages: dummyLanguages257 });258 expect(lang.name).toBe("javascript");259 expect(lang.literate).toBe(true);260 lang = languages.getLanguage("foo.md", {261 languages: dummyLanguages262 });263 expect(lang.name).toBe("markdown");264 expect(lang.literate).toBeUndefined();265 });266});267describe("Write", () => {268 it("is defined correctly", () => {269 expect(write.write).toEqual(write.default);270 expect(write).toMatchObject({271 write: expect.any(Function),272 destinationFactory: expect.any(Function),273 relativeFactory: expect.any(Function),274 sectionTest: expect.any(Function)275 });276 });277 it("returns functions from Factories", () => {278 expect(write.destinationFactory()).toBeType("function");279 expect(write.relativeFactory()).toBeType("function");280 });281 it("can get the destination from source file", () => {282 const foo = write.destinationFactory("bar.js", {output: "foo", languages: dummyLanguages});283 expect(foo("bar.js")).toBe("foo/bar.html");284 const bar = write.destinationFactory("qux.md", {output: "foo", languages: dummyLanguages});285 expect(bar("qux.md")).toBe("foo/qux.md");286 });287 it("can get the relative info from source file", () => {288 const bar = write.destinationFactory("bar.js", {output: "foo", languages: dummyLanguages});289 const foo = write.relativeFactory("bar.js", bar);290 expect(foo("bar.js")).toBe("../bar.js");291 });292 it("can check a section for validity", () => {293 expect(write.sectionTest("foo")).toBe(false);294 expect(write.sectionTest({})).toBe(false);295 expect(write.sectionTest({docsText: ""})).toBe(false);296 expect(write.sectionTest({docsText: "something"})).toBe(true);297 });298 it("produces no output when no template is present", () => {299 const restoreConsole = mockConsole("log");300 const config = {301 output: "foo",302 languages: dummyLanguages303 };304 write.write("bar.js", [{}], config);305 expect(global.console.log).toHaveBeenCalledTimes(0);306 expect(fs.outputFileSync).toHaveBeenCalledTimes(0);307 restoreConsole();308 });309 it("produces basic output", () => {310 const restoreConsole = mockConsole("log");311 const config = {312 output: "foo",313 languages: dummyLanguages,314 template: jest.fn().mockImplementation(() => {315 return "dummy output";316 })317 };318 write.write("bar.js", [{}], config);319 expect(global.console.log).toHaveBeenCalledTimes(0);320 expect(config.template).toHaveBeenCalledTimes(1);321 expect(fs.outputFileSync).toHaveBeenCalledTimes(1);322 restoreConsole();323 fs.outputFileSync.mockClear();324 });325 it("produces no output when dryrun is set", () => {326 const restoreConsole = mockConsole("log");327 const config = {328 output: "foo",329 languages: dummyLanguages,330 template: jest.fn().mockImplementation(() => {331 return "dummy output";332 }),333 dryrun: true334 };335 write.write("bar.js", [{}], config);336 expect(global.console.log).toHaveBeenCalledTimes(0);337 expect(config.template).toHaveBeenCalledTimes(1);338 expect(fs.outputFileSync).toHaveBeenCalledTimes(0);339 restoreConsole();340 fs.outputFileSync.mockClear();341 });342 it("logs debug data when verbose is set", () => {343 const restoreConsole = mockConsole("log");344 const config = {345 output: "foo",346 languages: dummyLanguages,347 template: jest.fn().mockImplementation(() => {348 return "dummy output";349 }),350 verbose: true351 };352 write.write("bar.js", [{}], config);353 expect(global.console.log).toHaveBeenCalledTimes(1);354 expect(config.template).toHaveBeenCalledTimes(1);355 expect(fs.outputFileSync).toHaveBeenCalledTimes(1);356 restoreConsole();357 fs.outputFileSync.mockClear();358 });359 it("processes with markdown if section text present", () => {360 const restoreConsole = mockConsole("log");361 marked.lexer.mockImplementationOnce((text) => {362 return [{depth: 1, text}];363 });364 const config = {365 output: "foo",366 languages: dummyLanguages,367 template: jest.fn().mockImplementation(() => {368 return "dummy output";369 })370 };371 write.write("bar.js", [{docsText: "foo"}], config);372 const lastTemplateCallArgs = config.template.mock.calls[config.template.mock.calls.length - 1];373 expect(global.console.log).toHaveBeenCalledTimes(0);374 expect(config.template).toHaveBeenCalledTimes(1);375 expect(lastTemplateCallArgs[0]).toMatchObject({hasTitle: false});376 expect(fs.outputFileSync).toHaveBeenCalledTimes(1);377 expect(marked.lexer).toHaveBeenCalledTimes(1);378 marked.lexer.mockClear();379 config.template.mockClear();380 fs.outputFileSync.mockClear();381 restoreConsole();382 });383 it("processes markdown and sets a title correctly", () => {384 const restoreConsole = mockConsole("log");385 marked.lexer.mockImplementationOnce((text) => {386 return [{depth: 1, type: "heading", text}];387 });388 const config = {389 output: "foo",390 languages: dummyLanguages,391 template: jest.fn().mockImplementation(() => {392 return "dummy output";393 })394 };395 write.write("bar.js", [{docsText: "foo"}], config);396 const lastTemplateCallArgs = config.template.mock.calls[config.template.mock.calls.length - 1];397 expect(global.console.log).toHaveBeenCalledTimes(0);398 expect(config.template).toHaveBeenCalledTimes(1);399 expect(lastTemplateCallArgs[0]).toMatchObject({hasTitle: true, title: "foo"});400 expect(fs.outputFileSync).toHaveBeenCalledTimes(1);401 expect(marked.lexer).toHaveBeenCalledTimes(1);402 marked.lexer.mockClear();403 config.template.mockClear();404 fs.outputFileSync.mockClear();405 restoreConsole();406 });407 it("uses css if present", () => {408 const config = {409 output: "foo",410 languages: dummyLanguages,411 template: jest.fn().mockImplementation(() => {412 return "dummy output";413 }),414 css: "foo.css"415 };416 marked.lexer.mockImplementationOnce((text) => {417 return [{depth: 1, type: "heading", text}];418 });419 write.write("bar.js", [{docsText: "foo"}], config);...

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logger-service-spec.js

Source:logger-service-spec.js Github

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...21 LoggerService.log('some text');22 expect(console.log).toHaveBeenCalledWith(expect.stringMatching(/.*\s-\ssome text/));23 configs.loggingEnabled = originaLoggingEnabled;24 configs.currentLogLevel = originaCurrentLogLevel;25 restoreConsole();26 LoggerService.changeStrategy(configs.logStrategy);27 });28 test('if changeStategy defaults to toDate when no existing stategy', function () {29 const originaLoggingEnabled = configs.loggingEnabled;30 const originaCurrentLogLevel = configs.currentLogLevel;31 configs.loggingEnabled = true;32 configs.currentLogLevel = 1;33 const restoreConsole = mockConsole('log');34 LoggerService.stategy = undefined;35 LoggerService.changeStrategy('nonexistingStrategy');36 LoggerService.log('some text');37 expect(console.log).toHaveBeenCalledWith('some text');38 configs.loggingEnabled = originaLoggingEnabled;39 configs.currentLogLevel = originaCurrentLogLevel;40 restoreConsole();41 LoggerService.changeStrategy(configs.logStrategy);42 });43 test('if logs are produced when loggingEnabled is off', function () {44 const originalConfigs = configs.loggingEnabled;45 configs.loggingEnabled = false;46 const restoreConsole = mockConsole('log');47 LoggerService.log('some text');48 expect(console.log).not.toHaveBeenCalled();49 configs.loggingEnabled = originalConfigs;50 restoreConsole();51 });52 test('if logs are produced when loggingEnabled is on but logLevel is below currentLogLevel', function () {53 const originaLoggingEnabled = configs.loggingEnabled;54 const originaCurrentLogLevel = configs.currentLogLevel;55 configs.loggingEnabled = true;56 configs.currentLogLevel = 1;57 const restoreConsole = mockConsole('log');58 LoggerService.log('some text', 2);59 expect(console.log).not.toHaveBeenCalled();60 configs.loggingEnabled = originaLoggingEnabled;61 configs.currentLogLevel = originaCurrentLogLevel;62 restoreConsole();63 });64 test('if logs are produced when log stategy set to none', function () {65 const originaLoggingEnabled = configs.loggingEnabled;66 const originaCurrentLogLevel = configs.currentLogLevel;67 configs.loggingEnabled = true;68 configs.currentLogLevel = 1;69 const restoreConsole = mockConsole('log');70 LoggerService.changeStrategy('none');71 LoggerService.log('some text');72 expect(console.log).not.toHaveBeenCalled();73 configs.loggingEnabled = originaLoggingEnabled;74 configs.currentLogLevel = originaCurrentLogLevel;75 LoggerService.changeStrategy(configs.logStrategy);76 restoreConsole();77 });78 test('if logs are written into file when log stategy is set to toFile', function () {79 const originaLoggingEnabled = configs.loggingEnabled;80 const originaCurrentLogLevel = configs.currentLogLevel;81 configs.loggingEnabled = true;82 configs.currentLogLevel = 1;83 LoggerService.changeStrategy('toFile');84 LoggerService.log('some text');85 expect(fs.appendFile).toHaveBeenCalledWith(86 expect.stringMatching(/.*logs\.txt/),87 expect.stringMatching(/.*\s-\ssome text/),88 expect.any(Function)89 );90 configs.loggingEnabled = originaLoggingEnabled;91 configs.currentLogLevel = originaCurrentLogLevel;92 LoggerService.changeStrategy(configs.logStrategy);93 });94 test('if logs are produced when loggingEnabled is on and set to noDate', function () {95 const originaLoggingEnabled = configs.loggingEnabled;96 const originaCurrentLogLevel = configs.currentLogLevel;97 configs.loggingEnabled = true;98 configs.currentLogLevel = 1;99 const restoreConsole = mockConsole('log');100 LoggerService.changeStrategy('noDate');101 LoggerService.log('some text');102 expect(console.log).toHaveBeenCalledWith('some text');103 configs.loggingEnabled = originaLoggingEnabled;104 configs.currentLogLevel = originaCurrentLogLevel;105 restoreConsole();106 LoggerService.changeStrategy(configs.logStrategy);107 });108 test('if logs are produced when loggingEnabled is on and set to toConsole', function () {109 const originaLoggingEnabled = configs.loggingEnabled;110 const originaCurrentLogLevel = configs.currentLogLevel;111 configs.loggingEnabled = true;112 configs.currentLogLevel = 1;113 const restoreConsole = mockConsole('log');114 LoggerService.changeStrategy('toConsole');115 LoggerService.log('some text');116 expect(console.log).toHaveBeenCalledWith(expect.stringMatching(/.*\s-\ssome text/));117 configs.loggingEnabled = originaLoggingEnabled;118 configs.currentLogLevel = originaCurrentLogLevel;119 restoreConsole();120 LoggerService.changeStrategy(configs.logStrategy);121 });...

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cli.spec.ts

Source:cli.spec.ts Github

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...55 cli.run(['-h']);56 // @ts-ignore57 const output = console.log.mock.calls.map(i => i.join('')).join('\n');58 expect(output).not.toBe('');59 restoreConsole();60 });61 test('--help', () => {62 const restoreConsole = mockConsole();63 cli.run(['--help']);64 // @ts-ignore65 const output = console.log.mock.calls.map(i => i.join('')).join('\n');66 expect(output).not.toBe('');67 restoreConsole();68 });69 test('-l', () => {70 const restoreConsole = mockConsole();71 cli.run(['-l']);72 // @ts-ignore73 const output = console.log.mock.calls.map(i => i.join('')).join('\n');74 expect(output).toBe('{}');75 restoreConsole();76 });77 test('-l a', () => {78 const restoreConsole = mockConsole();79 cli.run(['-l', 'a']);80 // @ts-ignore81 const output = console.log.mock.calls.map(i => i.join('')).join('\n');82 expect(JSON.parse(output)).toStrictEqual({ key: 'a' });83 restoreConsole();84 });85 test('-e key op value', () => {86 const restoreConsole = mockConsole();87 cli.run(['-e', 'key', 'op', 'value']);88 // @ts-ignore89 const output = console.log.mock.calls.map(i => i.join('')).join('\n');90 expect(JSON.parse(output)).toStrictEqual({91 key: 'key',92 operator: 'op',93 value: 'value',94 });95 restoreConsole();96 });97 test('-unknown key op value', () => {98 const restoreConsole = mockConsole();99 const args = ['-unknown', 'key', 'op', 'value'];100 cli.run(args);101 // @ts-ignore102 const output = console.log.mock.calls.map(i => i.join('')).join('\n');103 expect(output).toBe(`未知命令: ${args.join(' ')}`);104 restoreConsole();105 });...

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Using AI Code Generation

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1import { restoreConsole } from 'testing-library-react-hooks';2restoreConsole();3import { restoreConsole } from 'testing-library-react-hooks';4restoreConsole();5import { restoreConsole } from 'testing-library-react-hooks';6restoreConsole();7import { restoreConsole } from 'testing-library-react-hooks';8restoreConsole();9import { restoreConsole } from 'testing-library-react-hooks';10restoreConsole();11import { restoreConsole } from 'testing-library-react-hooks';12restoreConsole();13import { restoreConsole } from 'testing-library-react-hooks';14restoreConsole();15import { restoreConsole } from 'testing-library-react-hooks';16restoreConsole();17import { restoreConsole } from 'testing-library-react-hooks';18restoreConsole();19import { restoreConsole } from 'testing-library-react-hooks';20restoreConsole();21import { restoreConsole } from 'testing-library-react-hooks';

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1import { restoreConsole } from 'testing-library-react-hooks'2restoreConsole()3import { restoreConsole } from 'testing-library-react-hooks'4restoreConsole()5import { restoreConsole } from 'testing-library-react-hooks'6restoreConsole()7import { restoreConsole } from 'testing-library-react-hooks'8restoreConsole()9import { restoreConsole } from 'testing-library-react-hooks'10restoreConsole()11import { restoreConsole } from 'testing-library-react-hooks'12restoreConsole()13import { restoreConsole } from 'testing-library-react-hooks'14restoreConsole()

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1import { restoreConsole } from 'testing-library-react-hooks';2afterEach(() => {3 restoreConsole();4});5import { restoreConsole } from 'testing-library-react-hooks';6afterEach(() => {7 restoreConsole();8});9Your name to display (optional):10Your name to display (optional

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1import React from 'react';2import { shallow } from 'enzyme';3import App from './App';4describe('App', () => {5 it('should render', () => {6 const wrapper = shallow(<App />);7 expect(wrapper.exists()).toBe(true);8 });9});10import React from 'react';11import { shallow } from 'enzyme';12import App from './App';13describe('App', () => {14 it('should render', () => {15 const wrapper = shallow(<App />);16 expect(wrapper.exists()).toBe(true);17 });18});19import React from 'react';20import { shallow } from 'enzyme';21import App from './App';22describe('App', () => {23 it('should render', () => {24 const wrapper = shallow(<App />);25 expect(wrapper.exists()).toBe(true);26 });27});28import React from 'react';29import { shallow } from 'enzyme';30import App from './App';31describe('App', () => {32 it('should render', () => {33 const wrapper = shallow(<App />);34 expect(wrapper.exists()).toBe(true);35 });36});37import React from 'react';38import { shallow } from 'enzyme';39import App from './

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1import { restoreConsole } from '@testing-library/react-hooks'2import { renderHook } from '@testing-library/react-hooks'3import { useFetch } from './useFetch'4import { act } from 'react-dom/test-utils'5describe('useFetch', () => {6 afterEach(() => {7 restoreConsole()8 })9 it('should return data', async () => {10 const { result, waitForNextUpdate } = renderHook(() =>11 await act(async () => {12 await waitForNextUpdate()13 })14 expect(result.current.data).toEqual({15 })16 })17})18import { useState, useEffect } from 'react'19import axios from 'axios'20export const useFetch = (url) => {21 const [data, setData] = useState(null)22 const [loading, setLoading] = useState(true)23 useEffect(() => {24 const fetchData = async () => {25 try {26 const response = await axios.get(url)27 setData(response.data)28 setLoading(false)29 } catch (error) {30 console.log(error)31 }32 }33 fetchData()34 }, [url])35 return { data, loading }36}37import { useFetch } from './useFetch'38jest.mock('axios')39describe('useFetch', () => {40 it('should return data', async () => {41 const { result, waitForNextUpdate } = renderHook(() =>42 await act(async () => {43 await waitForNextUpdate()44 })45 expect(result.current.data).toEqual({46 })47 })48})49import { useState, useEffect } from 'react'50import axios from 'axios'51export const useFetch = (url) => {52 const [data, setData] = useState(null)53 const [loading, setLoading] = useState(true)54 useEffect(() => {55 const fetchData = async () => {56 try {57 const response = await axios.get(url)58 setData(response.data)

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1import { renderHook } from '@testing-library/react-hooks';2import { restoreConsole } from '@testing-library/react-hooks/dom';3describe('test1', () => {4 beforeAll(() => {5 restoreConsole();6 });7 test('test1', () => {8 const { result } = renderHook(() => useState('test'));9 expect(result.current[0]).toBe('test');10 });11});12import { renderHook } from '@testing-library/react-hooks';13import { restoreConsole } from '@testing-library/react-hooks/dom';14describe('test2', () => {15 beforeAll(() => {16 restoreConsole();17 });18 test('test2', () => {19 const { result } = renderHook(() => useState('test'));20 expect(result.current[0]).toBe('test');21 });22});23import { renderHook } from '@testing-library/react-hooks';24import { restoreConsole } from '@testing-library/react-hooks/dom';25describe('test3', () => {26 beforeAll(() => {27 restoreConsole();28 });29 test('test3', () => {30 const { result } = renderHook(() => useState('test'));31 expect(result.current[0]).toBe('test');32 });33});34import { renderHook } from '@testing-library/react-hooks';35import { restoreConsole } from '@testing-library/react-hooks/dom';36describe('test4', () => {37 beforeAll(() => {38 restoreConsole();39 });40 test('test4', () => {41 const { result } = renderHook(() => useState('test'));42 expect(result.current[0]).toBe('test');43 });44});45import { renderHook } from '@testing-library/react-hooks';46import { restoreConsole } from '@testing-library/react-hooks/dom';47describe('test5', () => {48 beforeAll(() => {49 restoreConsole();50 });51 test('test5', () => {52 const { result } = renderHook(() => useState('test'));53 expect(result.current[0]).toBe('test');54 });55});

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1import { act, renderHook } from '@testing-library/react-hooks';2import { restoreConsole } from '@testing-library/react-hooks';3import { useCounter } from './counter';4describe('useCounter', () => {5 it('should increment the counter', () => {6 const { result } = renderHook(() => useCounter());7 act(() => {8 result.current.increment();9 });10 expect(result.current.count).toBe(1);11 });12 it('should decrement the counter', () => {13 const { result } = renderHook(() => useCounter());14 act(() => {15 result.current.decrement();16 });17 expect(result.current.count).toBe(-1);18 });19 it('should not allow the counter to go below 0', () => {20 const { result } = renderHook(() => useCounter());21 act(() => {22 result.current.decrement();23 });24 expect(result.current.count).toBe(0);25 });26 it('should display a warning when the counter goes below 0', () => {27 const { result } = renderHook(() => useCounter());28 act(() => {29 result.current.decrement();30 });31 expect(result.current.count).toBe(0);32 expect(console.error).toHaveBeenCalledTimes(1);33 expect(console.error).toHaveBeenCalledWith(34 );35 restoreConsole();36 });37});38import { useState } from 'react';39export const useCounter = () => {40 const [count, setCount] = useState(0);41 const increment = () => {42 setCount(count + 1);43 };44 const decrement = () => {45 if (count > 0) {46 setCount(count - 1);47 } else {48 console.error('Warning: Counter cannot go below 0');49 }50 };51 return {52 };53};54import React from 'react';55import { useCounter } from './counter';56const App = () => {57 const { count, increment, decrement } = useCounter();58 return (59 <button onClick={decrement}>-</button>60 <span>{count}</span>61 <button onClick={increment}>+</button>62 );63};64export default App;65import React from '

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1import { renderHook } from '@testing-library/react-hooks'2import { restoreConsole } from 'jest-mock-console'3const { result, unmount } = renderHook(() => useMyHook())4restoreConsole()5unmount()6import { renderHook } from '@testing-library/react-hooks'7import { restoreConsole } from 'jest-mock-console'8const { result, unmount } = renderHook(() => useMyHook())9restoreConsole()10unmount()11jest.mock('jest-mock-console')12import { renderHook } from '@testing-library/react-hooks'13import { restoreConsole } from 'jest-mock-console'14const { result, unmount } = renderHook(() => useMyHook())15restoreConsole()16unmount()

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1import { restoreConsole } from '@testing-library/react-hooks'2const spy = jest.spyOn(console, 'log')3afterEach(() => {4 cleanup()5 restoreConsole()6})7test('should log the count', () => {8 const { result } = renderHook(() => useCounter())9 act(() => {10 result.current.increment()11 })12 expect(spy).toHaveBeenCalledTimes(1)13 expect(spy).toHaveBeenCalledWith(1)14})15afterEach(() => {16 cleanup()17})18test('should increment the count', () => {19 const { result } = renderHook(() => useCounter())20 act(() => {21 result.current.increment()22 })23 expect(result.current.count).toBe(1)24})25afterEach(() => {26 cleanup()27})28test('should decrement the count', () => {29 const { result } = renderHook(() => useCounter())30 act(() => {

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