How to use useEffectError method in testing-library-react-hooks
Best JavaScript code snippet using testing-library-react-hooks
errorHook.test.ts
Source:errorHook.test.ts 
...15 return () => clearTimeout(timeout);16 }, [throwError]);17 return useError(value);18 }19 function useEffectError(throwError) {20 useEffect(() => {21 useError(throwError);22 }, []);23 return true;24 }25 describe("synchronous", () => {26 test("should raise error", () => {27 const { result } = renderHook(() => useError(true));28 expect(() => {29 expect(result.current).not.toBe(undefined);30 }).toThrow(Error("expected"));31 });32 test("should capture error", () => {33 const { result } = renderHook(() => useError(true));34 expect(result.error).toEqual(Error("expected"));35 });36 test("should not capture error", () => {37 const { result } = renderHook(() => useError(false));38 expect(result.current).not.toBe(undefined);39 expect(result.error).toBe(undefined);40 });41 test.skip("should reset error", () => {42 const { result, rerender } = renderHook(43 (throwError) => useError(throwError),44 {45 initialProps: true,46 }47 );48 expect(result.error).not.toBe(undefined);49 rerender(false);50 expect(result.current).not.toBe(undefined);51 expect(result.error).toBe(undefined);52 });53 });54 describe("asynchronous", () => {55 test("should raise async error", async () => {56 const { result, waitForNextUpdate } = renderHook(() =>57 useAsyncError(true)58 );59 await waitForNextUpdate();60 expect(() => {61 expect(result.current).not.toBe(undefined);62 }).toThrow(Error("expected"));63 });64 test("should capture async error", async () => {65 const { result, waitForNextUpdate } = renderHook(() =>66 useAsyncError(true)67 );68 await waitForNextUpdate();69 expect(result.error).toEqual(Error("expected"));70 });71 test("should not capture async error", async () => {72 const { result, waitForNextUpdate } = renderHook(() =>73 useAsyncError(false)74 );75 await waitForNextUpdate();76 expect(result.current).not.toBe(undefined);77 expect(result.error).toBe(undefined);78 });79 test.skip("should reset async error", async () => {80 const { result, waitForNextUpdate, rerender } = renderHook(81 (throwError) => useAsyncError(throwError),82 {83 initialProps: true,84 }85 );86 await waitForNextUpdate();87 expect(result.error).not.toBe(undefined);88 rerender(false);89 await waitForNextUpdate();90 expect(result.current).not.toBe(undefined);91 expect(result.error).toBe(undefined);92 });93 });94 /*95 These tests capture error cases that are not currently being caught successfully.96 Refer to https://github.com/testing-library/react-hooks-testing-library/issues/30897 for more details.98 */99 describe.skip("effect", () => {100 test("should raise effect error", () => {101 const { result } = renderHook(() => useEffectError(true));102 expect(() => {103 expect(result.current).not.toBe(undefined);104 }).toThrow(Error("expected"));105 });106 test("should capture effect error", () => {107 const { result } = renderHook(() => useEffectError(true));108 expect(result.error).toEqual(Error("expected"));109 });110 test("should not capture effect error", () => {111 const { result } = renderHook(() => useEffectError(false));112 expect(result.current).not.toBe(undefined);113 expect(result.error).toBe(undefined);114 });115 test("should reset effect error", () => {116 const { result, waitForNextUpdate, rerender } = renderHook(117 (throwError) => useEffectError(throwError),118 {119 initialProps: true,120 }121 );122 expect(result.error).not.toBe(undefined);123 rerender(false);124 expect(result.current).not.toBe(undefined);125 expect(result.error).toBe(undefined);126 });127 });...
Using AI Code Generation
1import React from 'react';2import { renderHook, act } from '@testing-library/react-hooks';3import { useCounter } from './useCounter';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 = () => {13 const [count, setCount] = useState(0);14 const increment = () => setCount(count + 1);15 return { count, increment };16};17import React from 'react';18import { renderHook, act } from '@testing-library/react-hooks';19import { useCounter } from './useCounter';20test('should increment counter', () => {21 const { result } = renderHook(() => useCounter());22 expect(result.current.count).toBe(0);23 act(() => {24 result.current.increment();25 });26 expect(result.current.count).toBe(1);27});28import { useState, useEffect } from 'react';29export const useCounter = () => {30 const [count, setCount] = useState(0);31 const increment = () => setCount(count + 1);32 useEffect(() => {33 const interval = setInterval(() => {34 increment();35 }, 1000);36 return () => clearInterval(interval);37 }, []);38 return { count, increment };39};
Using AI Code Generation
1import { renderHook } from '@testing-library/react-hooks';2import { useEffectError } from 'use-effect-error';3test('useEffectError', () => {4 const { result } = renderHook(() => useEffectError(() => {5 throw new Error('test error');6 }));7 expect(result.error).toEqual(new Error('test error'));8});9import { renderHook } from '@testing-library/react-hooks';10import { useEffectError } from 'use-effect-error';11test('useEffectError', () => {12 const { result } = renderHook(() => useEffectError(() => {13 throw new Error('test error');14 }));15 expect(result.error).toEqual(new Error('test error'));16});17import { renderHook } from '@testing-library/react-hooks';18import { useEffectError } from 'use-effect-error';19test('useEffectError', () => {20 const { result } = renderHook(() => useEffectError(() => {21 throw new Error('test error');22 }));23 expect(result.error).toEqual(new Error('test error'));24});25import { renderHook } from '@testing-library/react-hooks';26import { useEffectError } from 'use-effect-error';27test('useEffectError', () => {28 const { result } = renderHook(() => useEffectError(() => {29 throw new Error('test error');30 }));31 expect(result.error).toEqual(new Error('test error'));32});33import { renderHook } from '@testing-library/react-hooks';34import { useEffectError } from 'use-effect-error';35test('useEffectError', () => {36 const { result } = renderHook(() => useEffectError(() => {37 throw new Error('test error');38 }));39 expect(result.error).toEqual(new Error('test error'));40});41import { renderHook } from '@testing-library/react-hooks';42import { useEffectError } from 'use-effect-error';43test('useEffectError', () => {44 const { result } = renderHook(() => useEffectError(() => {
Using AI Code Generation
1import { renderHook, act } from '@testing-library/react-hooks';2import useCounter from './useCounter';3describe('useCounter', () => {4 it('should return a counter value', () => {5 const { result } = renderHook(() => useCounter());6 expect(result.current.count).toBe(0);7 });8 it('should increment the counter', () => {9 const { result } = renderHook(() => useCounter());10 act(() => {11 result.current.increment();12 });13 expect(result.current.count).toBe(1);14 });15 it('should decrement the counter', () => {16 const { result } = renderHook(() => useCounter());17 act(() => {18 result.current.decrement();19 });20 expect(result.current.count).toBe(-1);21 });22});23import { useState } from 'react';24const useCounter = () => {25 const [count, setCount] = useState(0);26 const increment = () => setCount((c) => c + 1);27 const decrement = () => setCount((c) => c - 1);28 return { count, increment, decrement };29};30export default useCounter;31module.exports = {32 moduleNameMapper: {33 '^@/(.*)$': '<rootDir>/src/$1',34 },35};36{37 "compilerOptions": {
Using AI Code Generation
1import { useEffectError } from 'testing-library-react-hooks';2import { renderHook } from '@testing-library/react-hooks';3import { useFetch } from './useFetch';4test('useFetch', async () => {5 useEffectError(() => {6 });7});8import { useState, useEffect } from 'react';9import axios from 'axios';10export const useFetch = (url) => {11 const [data, setData] = useState(null);12 const [error, setError] = useState(null);13 const [isLoading, setIsLoading] = useState(false);14 useEffect(() => {15 const fetchData = async () => {16 try {17 setIsLoading(true);18 const response = await axios.get(url);19 setData(response.data);20 } catch (err) {21 setError(err);22 } finally {23 setIsLoading(false);24 }25 };26 fetchData();27 }, [url]);28 return { data, error, isLoading };29};30import { renderHook } from '@testing-library/react-hooks';31import { useFetch } from './useFetch';32test('useFetch', async () => {33 const { result, waitForNextUpdate } = renderHook(() =>34 );35 expect(result.current.isLoading).toBeTruthy();36 await waitForNextUpdate();37 expect(result.current.isLoading).toBeFalsy();38 expect(result.current.data).toHaveLength(10);39});40import { renderHook } from '@testing-library/react-hooks';41import { useFetch } from './useFetch';42test('useFetch', async () => {43 const { result, waitForNextUpdate } = renderHook(() =>44 );45 expect(result.current.isLoading).toBeTruthy();46 await waitForNextUpdate();47 expect(result.current.isLoading).toBeFalsy();48 expect(result.current.data).toHaveLength(10);49});50import { renderHook } from '@testing-library/react-hooks';51import { useFetch } from './useFetch';52test('useFetch', async () => {53 const { result, waitForNextUpdate } = renderHook(() =>54 );55 expect(result.current.isLoading).toBeTruthy();56 await waitForNextUpdate();
Using AI Code Generation
1import { renderHook, act } from '@testing-library/react-hooks';2import {useEffectError} from 'use-effect-error';3const { result } = renderHook(() => useEffectError(() => {4 throw new Error('error');5 }, []));6 act(() => {7 result.current[1]();8 });9 expect(result.current[0]).toBe('error');10import { renderHook, act } from '@testing-library/react-hooks';11import {useEffectError} from 'use-effect-error';12const { result } = renderHook(() => useEffectError(() => {13 throw new Error('error');14 }, []));15 act(() => {16 result.current[1]();17 });18 expect(result.current[0]).toBe('error');19import { renderHook, act } from '@testing-library/react-hooks';20import {useEffectError} from 'use-effect-error';21const { result } = renderHook(() => useEffectError(() => {22 throw new Error('error');23 }, []));24 act(() => {25 result.current[1]();26 });27 expect(result.current[0]).toBe('error');28import { renderHook, act } from '@testing-library/react-hooks';29import {useEffectError} from 'use-effect-error';30const { result } = renderHook(() => useEffectError(() => {31 throw new Error('error');32 }, []));33 act(() => {34 result.current[1]();35 });36 expect(result.current[0]).toBe('error');37import { renderHook, act } from '@testing-library/react-hooks';38import {useEffectError} from 'use-effect-error';39const { result } = renderHook(() => useEffectError(() => {40 throw new Error('error');41 }, []));42 act(() => {43 result.current[1]();44 });45 expect(result.current[0]).toBe('error');46import { renderHook, act } from '@testing-library/react-hooks';47import {useEffectError
Using AI Code Generation
1import React, { useEffect } from 'react';2import { renderHook } from '@testing-library/react-hooks';3import { useFetch } from './useFetch';4const Component = () => {5 const [data, loading, error] = useFetch();6 useEffect(() => {7 if (error) {8 console.log('error', error);9 }10 }, [error]);11 return (12 {loading ? (13 ) : (14 )}15 );16};17describe('useFetch', () => {18 it('should be able to fetch data', async () => {19 const { result, waitForNextUpdate } = renderHook(() => useFetch());20 expect(result.current[0]).toBe(null);21 expect(result.current[1]).toBe(true);22 expect(result.current[2]).toBe(null);23 await waitForNextUpdate();24 expect(result.current[0]).not.toBe(null);25 expect(result.current[1]).toBe(false);26 expect(result.current[2]).toBe(null);27 });28});29import { useState, useEffect } from 'react';30export const useFetch = () => {31 const [data, setData] = useState(null);32 const [loading, setLoading] = useState(true);33 const [error, setError] = useState(null);34 useEffect(() => {35 .then((response) => response.json())36 .then((data) => {37 setData(data);38 setLoading(false);39 setError(null);40 })41 .catch((err) => {42 setData(null);43 setLoading(false);44 setError(err);45 });46 }, []);47 return [data, loading, error];48};49{50 "dependencies": {
Using AI Code Generation
1import { useEffectError } from '@testing-library/react-hooks'2import { renderHook } from '@testing-library/react-hooks'3import { useFetch } from './useFetch'4const mockFetch = jest.fn(() => {5 return Promise.resolve({ json: () => Promise.resolve({ data: 'test data' }) })6})7test('should call fetch with the correct url', async () => {8 await useEffectError(() => {9 })10})11import { useEffect, useState } from 'react'12export const useFetch = (url, fetch) => {13 const [data, setData] = useState(null)14 useEffect(() => {15 fetch(url).then((response) => {16 response.json().then((data) => {17 setData(data)18 })19 })20 }, [url, fetch])21}22import { useEffectError } from '@testing-library/react-hooks'23import { renderHook } from '@testing-library/react-hooks'24import { useFetch } from './useFetch'25const mockFetch = jest.fn(() => {26 return Promise.resolve({ json: () => Promise.resolve({ data: 'test data' }) })27})28test('should call fetch with the correct url', async () => {29 await useEffectError(() => {30 })31})32import { useEffect, useState } from 'react'33export const useFetch = (url, fetch) => {34 const [data, setData] = useState(null)35 useEffect(() => {36 fetch(url).then((response) => {37 response.json().then((data) => {38 setData(data)39 })40 })41 }, [url, fetch])42}43import { useEffectError } from '@testing-library/react-hooks'44import { renderHook } from '@testing-library/react-hooks'45import { useFetch } from './useFetch'46const mockFetch = jest.fn(() => {
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:
- JUnit Tutorial
- TestNG Tutorial
- Webdriver Tutorial
- WebDriverIO Tutorial
- Protractor Tutorial
- Selenium 4 Tutorial
- Jenkins Tutorial
- NUnit Tutorial
- Jest Tutorial
- Playwright Tutorial
- Cypress Tutorial
- PyTest Tutorial
YouTube
You could also refer to video tutorials over LambdaTest YouTube channel to get step by step demonstration from industry experts.
Run testing-library-react-hooks automation tests on LambdaTest cloud grid
Perform automation testing on 3000+ real desktop and mobile devices online.
Try LambdaTest Now !!
Get 100 minutes of automation test minutes FREE!!
Was this article helpful?
