Best JavaScript code snippet using testing-library-react-hooks
asyncUtils.ts
Source: asyncUtils.ts
1import {2 Act,3 WaitOptions,4 WaitForOptions,5 WaitForValueToChangeOptions,6 WaitForNextUpdateOptions,7 AsyncUtils8} from '../types'9import { createTimeoutController } from '../helpers/createTimeoutController'10import { TimeoutError } from '../helpers/error'11const DEFAULT_INTERVAL = 5012const DEFAULT_TIMEOUT = 100013function asyncUtils(act: Act, addResolver: (callback: () => void) => void): AsyncUtils {14 const wait = async (callback: () => boolean | void, { interval, timeout }: WaitOptions) => {15 const checkResult = () => {16 const callbackResult = callback()17 return callbackResult ?? callbackResult === undefined18 }19 const timeoutSignal = createTimeoutController(timeout)20 const waitForResult = async () => {21 while (true) {22 const intervalSignal = createTimeoutController(interval)23 timeoutSignal.onTimeout(() => intervalSignal.cancel())24 await intervalSignal.wrap(new Promise<void>(addResolver))25 if (checkResult() || timeoutSignal.timedOut) {26 return27 }28 }29 }30 if (!checkResult()) {31 await act(() => timeoutSignal.wrap(waitForResult()))32 }33 return !timeoutSignal.timedOut34 }35 const waitFor = async (36 callback: () => boolean | void,37 { interval = DEFAULT_INTERVAL, timeout = DEFAULT_TIMEOUT }: WaitForOptions = {}38 ) => {39 const safeCallback = () => {40 try {41 return callback()42 } catch (error: unknown) {43 return false44 }45 }46 const result = await wait(safeCallback, { interval, timeout })47 if (!result && timeout) {48 throw new TimeoutError(waitFor, timeout)49 }50 }51 const waitForValueToChange = async (52 selector: () => unknown,53 { interval = DEFAULT_INTERVAL, timeout = DEFAULT_TIMEOUT }: WaitForValueToChangeOptions = {}54 ) => {55 const initialValue = selector()56 const result = await wait(() => selector() !== initialValue, { interval, timeout })57 if (!result && timeout) {58 throw new TimeoutError(waitForValueToChange, timeout)59 }60 }61 const waitForNextUpdate = async ({62 timeout = DEFAULT_TIMEOUT63 }: WaitForNextUpdateOptions = {}) => {64 let updated = false65 addResolver(() => {66 updated = true67 })68 const result = await wait(() => updated, { interval: false, timeout })69 if (!result && timeout) {70 throw new TimeoutError(waitForNextUpdate, timeout)71 }72 }73 return {74 waitFor,75 waitForValueToChange,76 waitForNextUpdate77 }78}...
custom-fetch.js
Source: custom-fetch.js
1import '@ungap/global-this';2export default function customFetch(3 endpoint,4 {5 body,6 ...customConfig7 } = {},8 {9 fetch = globalThis.fetch,10 AbortController = globalThis.AbortController,11 responseType = 'text',12 timeout13 } = {},14) {15 let timeoutSignal = undefined;16 if (timeout) {17 timeoutSignal = createTimeoutSignal(AbortController, timeout);18 }19 const config = {20 method: body ? 'POST' : 'GET',21 ...customConfig22 }23 // from here: https://github.com/developit/redaxios/blob/ab73a298ba9849c59d670230a9d24fd7b329fb4d/src/index.js#L17124 if (body && typeof body === 'object' && typeof body.append !== 'function') {25 config.body = JSON.stringify(body);26 config.headers = {27 ...config.headers,28 'content-type': 'application/json'29 };30 } else if (body) {31 config.body = body;32 }33 if (timeoutSignal) {34 config.signal = timeoutSignal.signal;35 }36 return fetch(endpoint, config).then(async (response) => {37 if (timeoutSignal) {38 timeoutSignal.clear();39 }40 if (!response.ok) {41 const errorMessage = await response.text();42 return Promise.reject(new Error(errorMessage));43 }44 const result = {};45 // see https://github.com/developit/redaxios/blob/ab73a298ba9849c59d670230a9d24fd7b329fb4d/src/index.js#L204-L21346 for (const i in response) {47 if (typeof response[i] !== 'function') result[i] = response[i];48 }49 const data = await response[responseType]();50 result.data = data;51 try {52 // just in case we can parse the result53 result.data = JSON.parse(data);54 } catch(error) {55 // ignore56 }57 return result;58 });59}60function createTimeoutSignal(AbortController, timeout) {61 const controller = new AbortController();62 const timeoutId = globalThis.setTimeout(() => {63 controller.abort();64 }, timeout);65 return {66 signal: controller.signal,67 clear: () => {68 globalThis.clearTimeout(timeoutId);69 }70 };...
timeoutAbortSignal.ts
Source: timeoutAbortSignal.ts
1import { createTimeoutAbortSignal, joinAbortSignals } from "~/Util/PromiseUtils";2import { ApiRequestMiddleware, ApiRequest, ApiRequestInvoker, ApiResponse } from "../ApiInterfaces";34const timeoutAbortSignal = (defaultTimeoutMs: number): ApiRequestMiddleware => (request: ApiRequest, next: ApiRequestInvoker): Promise<ApiResponse> => {5 const timeoutMs = request.timeout || defaultTimeoutMs;6 const timeoutSignal = createTimeoutAbortSignal(timeoutMs); 7 const finalSignal = request.signal8 ? joinAbortSignals(timeoutSignal, request.signal)9 : timeoutSignal;10 return next({11 ...request,12 signal: finalSignal13 });14};
...
Using AI Code Generation
1import { act, renderHook } from '@testing-library/react-hooks'2import { useFetch } from './useFetch'3import { rest } from 'msw'4import { setupServer } from 'msw/node'5const server = setupServer(6 return res(ctx.json({ name: 'typicode' }))7 })8beforeAll(() => server.listen())9afterEach(() => server.resetHandlers())10afterAll(() => server.close())11test('should return user data', async () => {12 expect(result.current.loading).toBeTruthy()13 expect(result.current.data).toBeNull()14 await waitForNextUpdate()15 expect(result.current.loading).toBeFalsy()16 expect(result.current.data).toEqual({ name: 'typicode' })17})18test('should return error', async () => {19 server.use(20 return res(ctx.status(404))21 })22 expect(result.current.loading).toBeTruthy()23 expect(result.current.data).toBeNull()24 await waitForNextUpdate()25 expect(result.current.loading).toBeFalsy()26 expect(result.current.data).toBeNull()27 expect(result.current.error).toEqual('Not Found')28})29test('should timeout', async () => {30 server.use(31 return new Promise((resolve) => setTimeout(() => resolve(res(ctx.json({ name: 'typicode' }))), 1000))32 })33 expect(result.current.loading).toBeTruthy()34 expect(result.current.data).toBeNull()35 await waitForNextUpdate({ timeout: 500 })36 expect(result.current.loading).toBeTruthy()37 expect(result.current.data).toBeNull()38 expect(result.current.error).toEqual('Timeout')39})40test('should timeout with custom error message', async () => {41 server.use(
Using AI Code Generation
1import { timeoutSignal } from '@testing-library/react-hooks'2import { timeoutSignal } from '@testing-library/react-hooks'3import { timeoutSignal } from '@testing-library/react-hooks'4import { timeoutSignal } from '@testing-library/react-hooks'5import { timeoutSignal } from '@testing-library/react-hooks'6import { timeoutSignal } from '@testing-library/react-hooks'7import { timeoutSignal } from '@testing-library/react-hooks'8import { timeoutSignal } from '@testing-library/react-hooks'9import { timeoutSignal } from '@testing-library/react-hooks'10import { timeoutSignal } from '@testing-library/react-hooks'11import { timeoutSignal } from '@testing-library/react-hooks'12import { timeoutSignal } from '@testing-library/react-hooks'13import { timeoutSignal } from '@testing-library/react-hooks'14import { timeoutSignal } from '@testing-library/react-hooks'15import { timeoutSignal } from '@testing-library/react-hooks'16import { timeoutSignal } from '@testing-library/react-hooks'17import { timeoutSignal } from '@testing-library/react-hooks'18import { timeoutSignal } from '@testing-library/react-hooks'
Using AI Code Generation
1import { renderHook } from '@testing-library/react-hooks';2import { useFetch } from './useFetch';3test('should fetch data', async () => {4 await waitForNextUpdate();5 expect(result.current.data.title).toBe('sunt aut facere repellat provident occaecati excepturi optio reprehenderit');6});7test('should fetch data and timeout', async () => {8 await waitFor(() => result.current.error, { timeout: 1000 });9 expect(result.current.error).toBe('Request timed out');10});11test('should fetch data and timeout', async () => {12 await waitForNextUpdate({ timeout: 1000 });13 expect(result.current.error).toBe('Request timed out');14});15test('should fetch data and timeout', async () => {16 await waitForNextUpdate({ timeout: 3000 });17 expect(result.current.data.title).toBe('sunt aut facere repellat provident occaecati excepturi optio reprehenderit');18});19import { useState, useEffect } from 'react';20export const useFetch = (url, options) => {21 const [data, setData] = useState(null);22 const [error, setError] = useState(null);23 useEffect(() => {24 const controller = new AbortController();25 const { signal } = controller;26 const fetchData = async () => {27 try {28 const res = await fetch(url, { signal, ...options });29 const json = await res.json();30 setData(json);31 } catch (err) {32 setError(err);33 }34 };35 fetchData();36 return () => controller.abort();37 }, [url, options]);38 return { data, error };39};
Using AI Code Generation
1import { renderHook } from '@testing-library/react-hooks'2import useFetch from './useFetch'3const { result, waitForNextUpdate, waitForValueToChange } = renderHook(() =>4await waitForNextUpdate()5expect(result.current).toEqual(['some data', false])6await waitForValueToChange(() => result.current[1])7expect(result.current).toEqual(['some data', true])8import { useReducer } from 'react'9function useFetch(url) {10 const [state, dispatch] = useReducer(reducer, {11 })12 useEffect(() => {13 dispatch({ type: 'FETCH_INIT' })14 fetch(url)15 .then(response => response.json())16 .then(data => dispatch({ type: 'FETCH_SUCCESS', payload: data }))17 }, [url])18}19function reducer(state, action) {20 switch (action.type) {21 return { ...state, loading: true }22 return { ...state, loading: false, data: action.payload }23 throw new Error()24 }25}26import { renderHook, act } from '@testing-library/react-hooks'27import { useReducer } from 'react'28import useFetch from './useFetch'29jest.mock('react', () => ({30 ...jest.requireActual('react'),31 useReducer: jest.fn(),32}))33describe('useFetch', () => {34 test('should fetch data and update state', async () => {35 const mockFetch = jest.fn().mockImplementation(() =>36 Promise.resolve({37 json: () => Promise.resolve({ data: 'some data' }),38 })39 const mockDispatch = jest.fn()40 useReducer.mockImplementation(() => [{ data: null, loading: true }, mockDispatch])41 await waitForNextUpdate()42 expect(result.current).toEqual([{ data: 'some data', loading: false }, mockDispatch])43 })44})45import { renderHook, act } from '@testing-library/react-hooks'46import { useReducer }
Using AI Code Generation
1import { renderHook, act } from '@testing-library/react-hooks';2import { useTimeout } from './useTimeout';3test('should use timeout', async () => {4 const { result, waitForNextUpdate, timeoutSignal } = renderHook(() =>5 useTimeout(1000)6 );7 expect(result.current).toBe(false);8 await act(async () => {9 await waitForNextUpdate();10 });11 expect(result.current).toBe(true);12});13import { useState, useEffect } from 'react';14export const useTimeout = (timeout) => {15 const [isTimeout, setIsTimeout] = useState(false);16 useEffect(() => {17 const timer = setTimeout(() => {18 setIsTimeout(true);19 }, timeout);20 return () => clearTimeout(timer);21 }, [timeout]);22 return isTimeout;23};
Using AI Code Generation
1import { renderHook } from '@testing-library/react-hooks';2import { useFetch } from './useFetch';3const mockFetch = jest.fn();4mockFetch.mockResolvedValue({5 json: () => Promise.resolve({ data: 'test data' }),6});7global.fetch = mockFetch;8describe('useFetch', () => {9 it('should fetch data', async () => {10 const { result, waitForNextUpdate } = renderHook(() =>11 );12 expect(result.current.data).toBe(null);13 expect(result.current.loading).toBe(true);14 expect(result.current.error).toBe(null);15 await waitForNextUpdate();16 expect(result.current.data).toBe('test data');17 expect(result.current.loading).toBe(false);18 expect(result.current.error).toBe(null);19 });20});21import { useState, useEffect } from 'react';22export const useFetch = (url) => {23 const [data, setData] = useState(null);24 const [loading, setLoading] = useState(true);25 const [error, setError] = useState(null);26 useEffect(() => {27 fetch(url)28 .then((res) => res.json())29 .then((data) => {30 setData(data);31 setLoading(false);32 setError(null);33 })34 .catch((err) => {35 setData(null);36 setLoading(false);37 setError(err);38 });39 }, [url]);40 return { data, loading, error };41};42import { renderHook } from '@testing-library/react-hooks';43import { useFetch } from './useFetch';44const mockFetch = jest.fn();45mockFetch.mockResolvedValue({46 json: () => Promise.resolve({ data: 'test data' }),47});48global.fetch = mockFetch;49describe('useFetch', () => {50 it('should fetch data', async () => {51 const { result, waitForNextUpdate } = renderHook(() =>52 );53 expect(result.current.data).toBe(null);54 expect(result.current.loading).toBe(true);55 expect(result.current.error).toBe(null);56 await waitForNextUpdate();
Using AI Code Generation
1import { useTimeout } from './useTimeout';2import { renderHook, act } from '@testing-library/react-hooks';3describe('useTimeout', () => {4 it('should work', () => {5 const { result, waitForNextUpdate, timeoutSignal } = renderHook(() =>6 useTimeout()7 );8 expect(result.current).toBe(false);9 act(() => {10 result.current[1]();11 });12 expect(result.current).toBe(true);13 act(() => {14 timeoutSignal();15 });16 expect(result.current).toBe(false);17 });18});19import { useState } from 'react';20export const useTimeout = () => {21 const [timeout, setTimeout] = useState(false);22 let timeoutId;23 const startTimeout = () => {24 timeoutId = setTimeout(() => {25 setTimeout(false);26 }, 1000);27 };28 const cancelTimeout = () => {29 clearTimeout(timeoutId);30 setTimeout(false);31 };32 return [timeout, startTimeout, cancelTimeout];33};34export declare const useTimeout: () => [boolean, () => void, () => void];35export declare const useTimeout: () => [boolean, () => void, () => void];36export declare const useTimeout: () => [boolean, () => void, () => void];37export declare const useTimeout: () => [boolean, () => void, () => void];38export declare const useTimeout: () => [boolean, () => void, () => void];39export declare const useTimeout: () => [boolean, () => void, () => void];40export declare const useTimeout: () => [boolean, () => void, () => void];
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