Best JavaScript code snippet using testing-library-react-hooks
errorHook.test.ts
Source: errorHook.test.ts
...7 throw new Error("expected");8 }9 return true;10 }11 function useAsyncError(throwError) {12 const [value, setValue] = useState();13 useEffect(() => {14 const timeout = setTimeout(() => setValue(throwError), 100);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....
useError.test.js
Source: useError.test.js
...8 }9 return true;10 }11 const somePromise = () => Promise.resolve();12 function useAsyncError(throwError) {13 const [value, setValue] = useState();14 useEffect(() => {15 somePromise().then(() => {16 setValue(throwError);17 });18 }, [throwError]);19 return useError(value);20 }21 describe('synchronous', () => {22 test('should raise error', () => {23 const {result} = renderHook(() => useError(true));24 expect(() => {25 expect(result.current).not.toBe(undefined);26 }).toThrow(Error('expected'));27 });28 test('should capture error', () => {29 const {result} = renderHook(() => useError(true));30 expect(result.error).toEqual(Error('expected'));31 });32 test('should not capture error', () => {33 const {result} = renderHook(() => useError(false));34 expect(result.current).not.toBe(undefined);35 expect(result.error).toBe(undefined);36 });37 test('should reset error', () => {38 const {result, rerender} = renderHook((throwError) => useError(throwError), {39 initialProps: true,40 });41 expect(result.error).not.toBe(undefined);42 rerender(false);43 expect(result.current).not.toBe(undefined);44 expect(result.error).toBe(undefined);45 });46 });47 describe('asynchronous', () => {48 test('should raise async error', async () => {49 const {result, waitForNextUpdate} = renderHook(() => useAsyncError(true));50 await waitForNextUpdate();51 expect(() => {52 expect(result.current).not.toBe(undefined);53 }).toThrow(Error('expected'));54 });55 test('should capture async error', async () => {56 const {result, waitForNextUpdate} = renderHook(() => useAsyncError(true));57 await waitForNextUpdate();58 expect(result.error).toEqual(Error('expected'));59 });60 test('should not capture async error', async () => {61 const {result, waitForNextUpdate} = renderHook(() => useAsyncError(false));62 await waitForNextUpdate();63 expect(result.current).not.toBe(undefined);64 expect(result.error).toBe(undefined);65 });66 test('should reset async error', async () => {67 const {result, waitForNextUpdate, rerender} = renderHook(68 (throwError) => useAsyncError(throwError),69 {70 initialProps: true,71 },72 );73 await waitForNextUpdate();74 expect(result.error).not.toBe(undefined);75 rerender(false);76 await waitForNextUpdate();77 expect(result.current).not.toBe(undefined);78 expect(result.error).toBe(undefined);79 });80 });...
useAsyncError.js
Source: useAsyncError.js
1import { useCallback, useState } from 'react';2const useAsyncError = () => {3 const [, setError] = useState();4 return useCallback(5 (error) => {6 setError(() => {7 throw error;8 });9 },10 [setError]11 );12};...
Using AI Code Generation
1import { renderHook, act } from '@testing-library/react-hooks';2import { useAsyncError } from 'react-hooks-testing-library';3const { result } = renderHook(() => useAsyncError());4act(() => {5 result.current(new Error('error'));6});7import { renderHook, act } from '@testing-library/react-hooks';8import { useAsyncError } from 'react-hooks-testing-library';9const { result } = renderHook(() => useAsyncError());10act(() => {11 result.current(new Error('error'));12});13import { renderHook, act } from '@testing-library/react-hooks';14import { useAsyncError } from 'react-hooks-testing-library';15const { result } = renderHook(() => useAsyncError());16act(() => {17 result.current(new Error('error'));18});19import { renderHook, act } from '@testing-library/react-hooks';20import { useAsyncError } from 'react-hooks-testing-library';21const { result } = renderHook(() => useAsyncError());22act(() => {23 result.current(new Error('error'));24});25import { renderHook, act } from '@testing-library/react-hooks';26import { useAsyncError } from 'react-hooks-testing-library';27const { result } = renderHook(() => useAsyncError());28act(() => {29 result.current(new Error('error'));30});31import { renderHook, act } from '@testing-library/react-hooks';32import { useAsyncError } from 'react-hooks-testing-library';33const { result } = renderHook(() => useAsyncError());34act(() => {35 result.current(new Error('error'));36});
Using AI Code Generation
1import { renderHook, act } from '@testing-library/react-hooks'2import { useAsyncError } from 'react-hooks-testing-library'3test('useAsyncError', async () => {4 const { result } = renderHook(() => useAsyncError())5 act(() => {6 result.current()7 })8 expect(result.error).toEqual(new Error('useAsyncError error'))9})
Using AI Code Generation
1import { renderHook } from '@testing-library/react-hooks';2import { useAsyncError } from 'react-hooks-testing-library';3test('should throw error when async fails', async () => {4 const { result, waitForNextUpdate } = renderHook(() => useAsyncError());5 result.current();6 await waitForNextUpdate();7 expect(result.error).toEqual(Error('Async error'));8});9import { renderHook } from '@testing-library/react-hooks';10import { useAsyncError } from 'react-hooks-testing-library';11test('should throw error when async fails', async () => {12 const { result, waitForNextUpdate } = renderHook(() => useAsyncError());13 result.current();14 await waitForNextUpdate();15 expect(result.error).toEqual(Error('Async error'));16});17import { renderHook } from '@testing-library/react-hooks';18import { useAsyncError } from 'react-hooks-testing-library';19test('should throw error when async fails', async () => {20 const { result, waitForNextUpdate } = renderHook(() => useAsyncError());21 result.current();22 await waitForNextUpdate();23 expect(result.error).toEqual(Error('Async error'));24});25import { renderHook } from '@testing-library/react-hooks';26import { useAsyncError } from 'react-hooks-testing-library';27test('should throw error when async fails', async () => {28 const { result, waitForNextUpdate } = renderHook(() => useAsyncError());29 result.current();30 await waitForNextUpdate();31 expect(result.error).toEqual(Error('Async error'));32});33import { renderHook } from '@testing-library/react-hooks';34import { useAsyncError } from 'react-hooks-testing-library';35test('should throw error when async fails', async () => {36 const { result, waitForNextUpdate } = renderHook(() => useAsyncError());37 result.current();38 await waitForNextUpdate();39 expect(result.error).toEqual(Error('Async error'));40});41import { renderHook
Using AI Code Generation
1import React from 'react';2import { render, waitFor, screen } from '@testing-library/react';3import { useAsyncError } from './useAsyncError';4const TestComponent = () => {5 const { error, setError } = useAsyncError();6 return (7 onClick={() => {8 setError(new Error('Error occurred'));9 }}10 {error && <div data-testid="error">{error.message}</div>}11 );12};13describe('useAsyncError hook', () => {14 it('should display error message', async () => {15 render(<TestComponent />);16 screen.getByText('set error').click();17 await waitFor(() => {18 screen.getByText('Error occurred');19 });20 });21});22import { useState } from 'react';23export const useAsyncError = () => {24 const [error, setError] = useState(null);25 const handleAsyncError = (error) => {26 setError(error);27 };28 return { error, setError: handleAsyncError };29};
Using AI Code Generation
1import { renderHook, act } from '@testing-library/react-hooks'2import { useAsyncError } from 'react-hooks-testing-library'3import useFetch from './useFetch'4test('useFetch hook', async () => {5 expect(result.current.loading).toBe(true)6 expect(result.current.data).toBe(null)7 expect(result.current.error).toBe(null)8 await waitForNextUpdate()9 expect(result.current.loading).toBe(false)10 expect(result.current.data).toEqual({ name: 'Luke Skywalker' })11 expect(result.current.error).toBe(null)12})13test('useFetch hook with error', async () => {14 expect(result.current.loading).toBe(true)15 expect(result.current.data).toBe(null)16 expect(result.current.error).toBe(null)17 await waitForNextUpdate()18 expect(result.current.loading).toBe(false)19 expect(result.current.data).toBe(null)20 expect(result.current.error).toBe('Request failed with status code 404')21})22test('useFetch hook with error', () => {23 expect(result.current.loading).toBe(true)24 expect(result.current.data).toBe(null)25 expect(result.current.error).toBe(null)26 useAsyncError(new Error('Request failed with status code 404'))27 expect(result.current.loading).toBe(false)28 expect(result.current.data).toBe(null)29 expect(result.current.error).toBe('Request failed with status code 404')30})31import { useState, useEffect } from 'react'32import axios from 'axios'33const useFetch = url => {34 const [loading, setLoading] = useState(true)35 const [data, setData] = useState(null)36 const [error, setError] = useState(null)37 useEffect(() => {38 const fetchData = async () => {39 try {
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