Best JavaScript code snippet using testing-library-react-hooks
asyncHook.test.ts
Source: asyncHook.test.ts
...22 return value;23 };24 test("should wait for next update", async () => {25 const { result, waitForNextUpdate } = renderHook(() =>26 useSequence("first", "second")27 );28 expect(result.current).toBe("first");29 await waitForNextUpdate();30 expect(result.current).toBe("second");31 });32 test("should wait for multiple updates", async () => {33 const { result, waitForNextUpdate } = renderHook(() =>34 useSequence("first", "second", "third")35 );36 expect(result.current).toBe("first");37 await waitForNextUpdate();38 expect(result.current).toBe("second");39 await waitForNextUpdate();40 expect(result.current).toBe("third");41 });42 test("should resolve all when updating", async () => {43 const { result, waitForNextUpdate } = renderHook(() =>44 useSequence("first", "second")45 );46 expect(result.current).toBe("first");47 await Promise.all([48 waitForNextUpdate(),49 waitForNextUpdate(),50 waitForNextUpdate(),51 ]);52 expect(result.current).toBe("second");53 });54 test("should reject if timeout exceeded when waiting for next update", async () => {55 const { result, waitForNextUpdate } = renderHook(() =>56 useSequence("first", "second")57 );58 expect(result.current).toBe("first");59 await expect(waitForNextUpdate({ timeout: 10 })).rejects.toThrow(60 Error("Timed out in waitForNextUpdate after 10ms.")61 );62 });63 test("should wait for expectation to pass", async () => {64 const { result, wait } = renderHook(() =>65 useSequence("first", "second", "third")66 );67 expect(result.current).toBe("first");68 let complete = false;69 await wait(() => {70 expect(result.current).toBe("third");71 complete = true;72 });73 expect(complete).toBe(true);74 });75 test("should not hang if expectation is already passing", async () => {76 const { result, wait } = renderHook(() => useSequence("first", "second"));77 expect(result.current).toBe("first");78 let complete = false;79 await wait(() => {80 expect(result.current).toBe("first");81 complete = true;82 });83 expect(complete).toBe(true);84 });85 test("should reject if callback throws error", async () => {86 const { result, wait } = renderHook(() =>87 useSequence("first", "second", "third")88 );89 expect(result.current).toBe("first");90 await expect(91 wait(92 () => {93 if (result.current === "second") {94 throw new Error("Something Unexpected");95 }96 return result.current === "third";97 },98 {99 suppressErrors: false,100 }101 )102 ).rejects.toThrow(Error("Something Unexpected"));103 });104 test("should reject if callback immediately throws error", async () => {105 const { result, wait } = renderHook(() =>106 useSequence("first", "second", "third")107 );108 expect(result.current).toBe("first");109 await expect(110 wait(111 () => {112 throw new Error("Something Unexpected");113 },114 {115 suppressErrors: false,116 }117 )118 ).rejects.toThrow(Error("Something Unexpected"));119 });120 test("should wait for truthy value", async () => {121 const { result, wait } = renderHook(() =>122 useSequence("first", "second", "third")123 );124 expect(result.current).toBe("first");125 await wait(() => result.current === "third");126 expect(result.current).toBe("third");127 });128 // FIXME129 test.skip("should reject if timeout exceeded when waiting for expectation to pass", async () => {130 const { result, wait } = renderHook(() =>131 useSequence("first", "second", "third")132 );133 expect(result.current).toBe("first");134 await expect(135 wait(136 () => {137 expect(result.current).toBe("third");138 },139 { timeout: 75 }140 )141 ).rejects.toThrow(Error("Timed out in wait after 75ms."));142 });143 test("should wait for value to change", async () => {144 const { result, waitForValueToChange } = renderHook(() =>145 useSequence("first", "second", "third")146 );147 expect(result.current).toBe("first");148 await waitForValueToChange(() => result.current === "third");149 expect(result.current).toBe("third");150 });151 test("should reject if timeout exceeded when waiting for value to change", async () => {152 const { result, waitForValueToChange } = renderHook(() =>153 useSequence("first", "second", "third")154 );155 expect(result.current).toBe("first");156 await expect(157 waitForValueToChange(() => result.current === "third", {158 timeout: 75,159 })160 ).rejects.toThrow(Error("Timed out in waitForValueToChange after 75ms."));161 });162 test("should reject if selector throws error", async () => {163 const { result, waitForValueToChange } = renderHook(() =>164 useSequence("first", "second")165 );166 expect(result.current).toBe("first");167 await expect(168 waitForValueToChange(() => {169 if (result.current === "second") {170 throw new Error("Something Unexpected");171 }172 return result.current;173 })174 ).rejects.toThrow(Error("Something Unexpected"));175 });176 test("should not reject if selector throws error and suppress errors option is enabled", async () => {177 const { result, waitForValueToChange } = renderHook(() =>178 useSequence("first", "second", "third")179 );180 expect(result.current).toBe("first");181 await waitForValueToChange(182 () => {183 if (result.current === "second") {184 throw new Error("Something Unexpected");185 }186 return result.current === "third";187 },188 { suppressErrors: true }189 );190 expect(result.current).toBe("third");191 });192});
useEffect-asyncHook.test.js
Source: useEffect-asyncHook.test.js
...20 }, [...values]);21 return value;22 };23 test('should wait for next update', async () => {24 const {result, waitForNextUpdate} = renderHook(() => useSequence('first', 'second'));25 expect(result.current).toBe('first');26 await waitForNextUpdate();27 expect(result.current).toBe('second');28 });29 test('should wait for multiple updates', async () => {30 const {result, waitForNextUpdate} = renderHook(() => useSequence('first', 'second', 'third'));31 expect(result.current).toBe('first');32 await waitForNextUpdate();33 expect(result.current).toBe('second');34 await waitForNextUpdate();35 expect(result.current).toBe('third');36 });37 test('should resolve all when updating', async () => {38 const {result, waitForNextUpdate} = renderHook(() => useSequence('first', 'second'));39 expect(result.current).toBe('first');40 await Promise.all([waitForNextUpdate(), waitForNextUpdate(), waitForNextUpdate()]);41 expect(result.current).toBe('second');42 });43 test('should reject if timeout exceeded when waiting for next update', async () => {44 const {result, waitForNextUpdate} = renderHook(() => useSequence('first', 'second'));45 expect(result.current).toBe('first');46 await expect(waitForNextUpdate({timeout: 10})).rejects.toThrow(47 Error('Timed out in waitForNextUpdate after 10ms.'),48 );49 });50 test('should wait for expectation to pass', async () => {51 const {result, wait} = renderHook(() => useSequence('first', 'second', 'third'));52 expect(result.current).toBe('first');53 let complete = false;54 await wait(() => {55 expect(result.current).toBe('third');56 complete = true;57 });58 expect(complete).toBe(true);59 });60 test('should not hang if expectation is already passing', async () => {61 const {result, wait} = renderHook(() => useSequence('first', 'second'));62 expect(result.current).toBe('first');63 let complete = false;64 await wait(() => {65 expect(result.current).toBe('first');66 complete = true;67 });68 expect(complete).toBe(true);69 });70 test('should reject if callback throws error', async () => {71 const {result, wait} = renderHook(() => useSequence('first', 'second', 'third'));72 expect(result.current).toBe('first');73 await expect(74 wait(75 () => {76 if (result.current === 'second') {77 throw new Error('Something Unexpected');78 }79 return result.current === 'third';80 },81 {82 suppressErrors: false,83 },84 ),85 ).rejects.toThrow(Error('Something Unexpected'));86 });87 test('should reject if callback immediately throws error', async () => {88 const {result, wait} = renderHook(() => useSequence('first', 'second', 'third'));89 expect(result.current).toBe('first');90 await expect(91 wait(92 () => {93 throw new Error('Something Unexpected');94 },95 {96 suppressErrors: false,97 },98 ),99 ).rejects.toThrow(Error('Something Unexpected'));100 });101 test('should wait for truthy value', async () => {102 const {result, wait} = renderHook(() => useSequence('first', 'second', 'third'));103 expect(result.current).toBe('first');104 await wait(() => result.current === 'third');105 expect(result.current).toBe('third');106 });107 test('should reject if timeout exceeded when waiting for expectation to pass', async () => {108 const {result, wait} = renderHook(() => useSequence('first', 'second', 'third'));109 expect(result.current).toBe('first');110 await expect(111 wait(112 () => {113 expect(result.current).toBe('third');114 },115 {timeout: 75},116 ),117 ).rejects.toThrow(Error('Timed out in wait after 75ms.'));118 });119 test('should wait for value to change', async () => {120 const {result, waitForValueToChange} = renderHook(() => useSequence('first', 'second', 'third'));121 expect(result.current).toBe('first');122 await waitForValueToChange(() => result.current === 'third');123 expect(result.current).toBe('third');124 });125 test('should reject if timeout exceeded when waiting for value to change', async () => {126 const {result, waitForValueToChange} = renderHook(() => useSequence('first', 'second', 'third'));127 expect(result.current).toBe('first');128 await expect(129 waitForValueToChange(() => result.current === 'third', {130 timeout: 75,131 }),132 ).rejects.toThrow(Error('Timed out in waitForValueToChange after 75ms.'));133 });134 test('should reject if selector throws error', async () => {135 const {result, waitForValueToChange} = renderHook(() => useSequence('first', 'second'));136 expect(result.current).toBe('first');137 await expect(138 waitForValueToChange(() => {139 if (result.current === 'second') {140 throw new Error('Something Unexpected');141 }142 return result.current;143 }),144 ).rejects.toThrow(Error('Something Unexpected'));145 });146 test('should not reject if selector throws error and suppress errors option is enabled', async () => {147 const {result, waitForValueToChange} = renderHook(() => useSequence('first', 'second', 'third'));148 expect(result.current).toBe('first');149 await waitForValueToChange(150 () => {151 if (result.current === 'second') {152 throw new Error('Something Unexpected');153 }154 return result.current === 'third';155 },156 {suppressErrors: true},157 );158 expect(result.current).toBe('third');159 });...
Using AI Code Generation
1import { useSequence } from '@testing-library/react-hooks';2import { renderHook } from '@testing-library/react-hooks';3import { useCounter } from './useCounter';4describe('useCounter', () => {5 it('should increment the counter', () => {6 const { result } = renderHook(() => useCounter());7 const [count, increment] = result.current;8 expect(count).toBe(0);9 increment();10 expect(count).toBe(1);11 });12 it('should increment the counter using useSequence', () => {13 const { result } = renderHook(() => useCounter());14 const [count, increment] = result.current;15 useSequence(() => {16 expect(count).toBe(0);17 increment();18 expect(count).toBe(1);19 });20 });21});22import { useSequence } from '@testing-library/react-hooks';23import { renderHook } from '@testing-library/react-hooks';24import { useCounter } from './useCounter';25describe('useCounter', () => {26 it('should increment the counter', () => {27 const { result } = renderHook(() => useCounter());28 const [count, increment] = result.current;29 expect(count).toBe(0);30 increment();31 expect(count).toBe(1);32 });33 it('should increment the counter using useSequence', () => {34 const { result } = renderHook(() => useCounter());35 const [count, increment] = result.current;36 useSequence(() => {37 expect(count).toBe(0);38 increment();39 expect(count).toBe(1);40 });41 });42});43import { useSequence } from '@testing-library/react-hooks';44import { renderHook } from '@testing-library/react-hooks';45import { useCounter } from './useCounter';46describe('useCounter', () => {47 it('should increment the counter', () => {48 const { result } = renderHook(() => useCounter());49 const [count, increment] = result.current;50 expect(count).toBe(0);51 increment();52 expect(count).toBe(1);53 });54 it('should increment the counter using useSequence', () => {55 const { result } = renderHook(() => useCounter());
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});10test('should decrement counter', () => {11 const { result } = renderHook(() => useCounter());12 act(() => {13 result.current.decrement();14 });15 expect(result.current.count).toBe(-1);16});17test('should reset counter', () => {18 const { result } = renderHook(() => useCounter());19 act(() => {20 result.current.increment();21 result.current.reset();22 });23 expect(result.current.count).toBe(0);24});25test('should increment counter by 2', () => {26 const { result } = renderHook(() => useCounter());27 act(() => {28 result.current.incrementByTwo();29 });30 expect(result.current.count).toBe(2);31});32test('should decrement counter by 2', () => {33 const { result } = renderHook(() => useCounter());34 act(() => {35 result.current.decrementByTwo();36 });37 expect(result.current.count).toBe(-2);38});39test('should increment counter by 3', () => {40 const { result } = renderHook(() => useCounter());41 act(() => {42 result.current.incrementByThree();43 });44 expect(result.current.count).toBe(3);45});46test('should decrement counter by 3', () => {47 const { result } = renderHook(() => useCounter());48 act(() => {49 result.current.decrementByThree();50 });51 expect(result.current.count).toBe(-3);52});53test('should increment counter by 4', () => {54 const { result } = renderHook(() => useCounter());55 act(() => {56 result.current.incrementByFour();57 });58 expect(result.current.count).toBe(4);59});60test('should decrement counter by 4', () => {61 const { result } = renderHook(() => useCounter());62 act(() => {63 result.current.decrementByFour();64 });65 expect(result.current.count).toBe(-4);66});67test('should increment counter by 5', () => {68 const { result } = renderHook(() => useCounter());
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 it("should decrement counter", () => {12 const { result } = renderHook(() => useCounter());13 act(() => {14 result.current.decrement();15 });16 expect(result.current.count).toBe(-1);17 });18});19import { useState } from "react";20export default function useCounter() {21 const [count, setCount] = useState(0);22 const increment = () => {23 setCount(count + 1);24 };25 const decrement = () => {26 setCount(count - 1);27 };28 return {29 };30}31{32 "dependencies": {33 },34 "scripts": {35 },36 "eslintConfig": {37 },38 "browserslist": {39 }40}41import React from "react";42import { render } from "@testing-library/react";43import App from "./App";
Using AI Code Generation
1import { renderHook } from '@testing-library/react-hooks';2import { useSequence } from '../src/useSequence';3test('should return the sequence', () => {4 const { result } = renderHook(() => useSequence([1, 2, 3]));5 expect(result.current).toBe(1);6});7import { renderHook } from '@testing-library/react-hooks';8import { useSequence } from '../src/useSequence';9test('should return the sequence', () => {10 const { result } = renderHook(() => useSequence([1, 2, 3]));11 expect(result.current).toBe(1);12});13import { renderHook } from '@testing-library/react-hooks';14import { useSequence } from '../src/useSequence';15test('should return the sequence', () => {16 const { result } = renderHook(() => useSequence([1, 2, 3]));17 expect(result.current).toBe(1);18});19import { renderHook } from '@testing-library/react-hooks';20import { useSequence } from '../src/useSequence';21test('should return the sequence', () => {22 const { result } = renderHook(() => useSequence([1, 2, 3]));23 expect(result.current).toBe(1);24});25import { renderHook } from '@testing-library/react-hooks';26import { useSequence } from '../src/useSequence';27test('should return the sequence', () => {28 const { result } = renderHook(() => useSequence([1, 2, 3]));29 expect(result.current).toBe(1);30});31import { renderHook } from '@testing-library/react-hooks';32import { useSequence } from '../src/useSequence';33test('should return the sequence', () => {34 const { result } = renderHook(() => useSequence([1, 2, 3]));35 expect(result.current).toBe(1);36});
Using AI Code Generation
1import { act, renderHook } 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})10test('should decrement counter', () => {11 const { result } = renderHook(() => useCounter())12 act(() => {13 result.current.decrement()14 })15 expect(result.current.count).toBe(-1)16})17test('should reset counter', () => {18 const { result } = renderHook(() => useCounter())19 act(() => {20 result.current.increment()21 result.current.increment()22 result.current.reset()23 })24 expect(result.current.count).toBe(0)25})26test('should increment counter by 2', () => {27 const { result } = renderHook(() => useCounter(2))28 act(() => {29 result.current.increment()30 })31 expect(result.current.count).toBe(2)32})33test('should decrement counter by 2', () => {34 const { result } = renderHook(() => useCounter(2))35 act(() => {36 result.current.decrement()37 })38 expect(result.current.count).toBe(-2)39})40import { useState } from 'react'41export const useCounter = (initialCount = 0) => {42 const [count, setCount] = useState(initialCount)43 const increment = () => {44 setCount(count + 1)45 }46 const decrement = () => {47 setCount(count - 1)48 }49 const reset = () => {50 setCount(initialCount)51 }52 return { count, increment, decrement, reset }53}54export declare const useCounter: (initialCount?: number | undefined) => {55 increment: () => void56 decrement: () => void57 reset: () => void58}59import '@testing-library/jest-dom'60import '@testing-library/react-hooks'61declare module '@testing-library/react-hooks' {
Using AI Code Generation
1import { renderHook, act } from '@testing-library/react-hooks';2import { useSequence } from '../hooks/useSequence';3describe('useSequence', () => {4 test('should return the value of the sequence', () => {5 const { result } = renderHook(() => useSequence(1, 2, 3));6 expect(result.current).toBe(1);7 });8 test('should return the next value of the sequence', () => {9 const { result } = renderHook(() => useSequence(1, 2, 3));10 act(() => {11 result.current.next();12 });13 expect(result.current).toBe(2);14 });15 test('should return the previous value of the sequence', () => {16 const { result } = renderHook(() => useSequence(1, 2, 3));17 act(() => {18 result.current.next();19 result.current.next();20 result.current.previous();21 });22 expect(result.current).toBe(2);23 });24 test('should return the first value of the sequence', () => {25 const { result } = renderHook(() => useSequence(1, 2, 3));26 act(() => {27 result.current.next();28 result.current.next();29 result.current.first();30 });31 expect(result.current).toBe(1);32 });33 test('should return the last value of the sequence', () => {34 const { result } = renderHook(() => useSequence(1, 2, 3));35 act(() => {36 result.current.next();37 result.current.next();38 result.current.last();39 });40 expect(result.current).toBe(3);41 });42 test('should return the first value of the sequence', () => {43 const { result } = renderHook(() => useSequence(1, 2, 3));44 act(() => {45 result.current.next();46 result.current.next();47 result.current.first();48 });49 expect(result.current).toBe(1);50 });51 test('should return the last value of the sequence', () => {52 const { result } = renderHook(() => useSequence(1, 2, 3));53 act(() => {54 result.current.next();55 result.current.next();56 result.current.last();57 });58 expect(result.current).toBe(3);59 });60 test('should return the first value of the sequence', () => {
Using AI Code Generation
1import { renderHook } from '@testing-library/react-hooks';2import { useSequence } from '../src/useSequence';3const { result, waitForNextUpdate } = renderHook(() => useSequence(1000));4import { renderHook } from '@testing-library/react-hooks';5import { useSequence } from '../src/useSequence';6const { result, waitForNextUpdate } = renderHook(() => useSequence(1000));7import { renderHook } from '@testing-library/react-hooks';8import { useSequence } from '../src/useSequence';9const { result, waitForNextUpdate } = renderHook(() => useSequence(1000));10import { renderHook } from '@testing-library/react-hooks';11import { useSequence } from '../src/useSequence';12const { result, waitForNextUpdate } = renderHook(() => useSequence(1000));13import { renderHook } from '@testing-library/react-hooks';14import { useSequence } from '../src/useSequence';15const { result, waitForNextUpdate } = renderHook(() => useSequence(1000));16import { renderHook } from '@testing-library/react-hooks';17import { useSequence } from '../src/useSequence';18const { result, waitForNextUpdate } = renderHook(() => useSequence(1000));19import { renderHook } from '@testing-library/react-hooks';20import { useSequence } from '../src/useSequence';21const { result, waitForNextUpdate } = renderHook(() => useSequence(1000));
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