Best JavaScript code snippet using testing-library-react-hooks
cleanup.js
Source: cleanup.js
...60function addCleanup(callback) {61 cleanupCallbacks.add(callback);62}63exports.addCleanup = addCleanup;64function removeCleanup(callback) {65 cleanupCallbacks.delete(callback);66}...
test_mixins.js
Source: test_mixins.js
...23 var f1 = this.pushCleanup(new A(1));24 this.f2 = this.pushCleanup(2, cleanup);25 this.pushCleanup(new A(3));26 this.pushCleanup(new A(4));27 this.removeCleanup(f1);28 f1();29 this.popCleanup();30 },31 remove2: function(){32 if(this.removeCleanup(this.f2)){33 this.f2();34 this.f2 = null;35 }36 },37 destroy: function(){38 msgs.push(-99);39 }40 });41 var b = new B();42 eval(t.TEST('msgs.join(",") == "1,3,4,-1,-4"'));43 b.remove2();44 eval(t.TEST('msgs.join(",") == "1,3,4,-1,-4,-2"'));45 b.remove2();46 eval(t.TEST('msgs.join(",") == "1,3,4,-1,-4,-2"'));...
cleanup.ts
Source: cleanup.ts
...8}9function addCleanup(callback) {10 cleanupCallbacks.push(callback);11}12function removeCleanup(callback) {13 cleanupCallbacks = cleanupCallbacks.filter((cb) => cb !== callback);14}...
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.increment()22 result.current.increment()23 result.current.reset()24 })25 expect(result.current.count).toBe(0)26})27test('should increment counter by 5', () => {28 const { result } = renderHook(() => useCounter())29 act(() => {30 result.current.incrementBy(5)31 })32 expect(result.current.count).toBe(5)33})34test('should decrement counter by 5', () => {35 const { result } = renderHook(() => useCounter())36 act(() => {37 result.current.decrementBy(5)38 })39 expect(result.current.count).toBe(-5)40})41test('should increment counter by 5 and then reset', () => {42 const { result } = renderHook(() => useCounter())43 act(() => {44 result.current.incrementBy(5)45 result.current.reset()46 })47 expect(result.current.count).toBe(0)48})49test('should decrement counter by 5 and then reset', () => {50 const { result } = renderHook(() => useCounter())51 act(() => {52 result.current.decrementBy(5)53 result.current.reset()54 })55 expect(result.current.count).toBe(0)56})57test('should increment counter by 5 and then decrement by 5', () => {58 const { result } = renderHook(() => useCounter())59 act(() => {60 result.current.incrementBy(5)61 result.current.decrementBy(5)62 })63 expect(result.current.count).toBe(0)64})65test('should decrement counter by 5 and then increment by 5', () => {66 const { result } = renderHook(() => useCounter())67 act(() => {
Using AI Code Generation
1import { renderHook, act } from '@testing-library/react-hooks';2import { useCounter } from './useCounter';3test('useCounter', () => {4 const { result, unmount } = renderHook(() => useCounter());5 act(() => result.current.increment());6 expect(result.current.count).toBe(1);7 unmount();8});9import { useState, useEffect } from 'react';10export const useCounter = () => {11 const [count, setCount] = useState(0);12 useEffect(() => {13 const id = setInterval(() => setCount((c) => c + 1), 1000);14 return () => clearInterval(id);15 }, []);16 const increment = () => setCount((c) => c + 1);17 return { count, increment };18};
Using AI Code Generation
1import { renderHook, act } from "@testing-library/react-hooks";2import { useCounter } from "./useCounter";3describe("useCounter", () => {4 it("should increase the counter", () => {5 const { result } = renderHook(() => useCounter());6 act(() => {7 result.current.increment();8 });9 expect(result.current.count).toBe(1);10 });11});12import { useState, useEffect } from "react";13export const useCounter = () => {14 const [count, setCount] = useState(0);15 useEffect(() => {16 console.log("useEffect called");17 return () => {18 console.log("useEffect cleanup called");19 };20 }, [count]);21 return {22 increment: () => setCount(count + 1),23 decrement: () => setCount(count - 1),24 };25};26import { renderHook, act } from "@testing-library/react-hooks";27import { useCounter } from "./useCounter";28describe("useCounter", () => {29 it("should increase the counter", () => {30 const { result } = renderHook(() => useCounter());31 act(() => {32 result.current.increment();33 });34 expect(result.current.count).toBe(1);35 });36});37import { useState, useEffect } from "react";38export const useCounter = () => {39 const [count, setCount] = useState(0);40 useEffect(() => {41 console.log("useEffect called");42 return () => {43 console.log("useEffect cleanup called");44 };45 }, [count]);46 return {47 increment: () => setCount(count + 1),48 decrement: () => setCount(count - 1),49 };50};51import { renderHook, act } from "@testing-library/react-hooks";52import { useCounter } from "./useCounter";53describe("useCounter", () => {54 it("should increase the counter", () => {55 const { result } = renderHook(() => useCounter());56 act(() => {
Using AI Code Generation
1import { render, screen } from '@testing-library/react';2import userEvent from '@testing-library/user-event';3import { useCounter } from './useCounter';4test('counter test', () => {5 const { result, removeCleanup } = renderHook(() => useCounter());6 expect(result.current.count).toBe(0);7 act(() => {8 result.current.increment();9 });10 expect(result.current.count).toBe(1);11 removeCleanup();12});13import { useEffect, useState } from 'react';14export const useCounter = () => {15 const [count, setCount] = useState(0);16 useEffect(() => {17 const id = setInterval(() => {18 setCount((prevCount) => prevCount + 1);19 }, 1000);20 return () => clearInterval(id);21 }, []);22 const increment = () => setCount((prevCount) => prevCount + 1);23 return { count, increment };24};25import { useCounter } from './useCounter';26import { renderHook, act } from '@testing-library/react-hooks';27test('counter test', () => {28 const { result } = renderHook(() => useCounter());29 expect(result.current.count).toBe(0);30 act(() => {31 result.current.increment();32 });33 expect(result.current.count).toBe(1);34});35import { useEffect, useState } from 'react';36export const useCounter = () => {37 const [count, setCount] = useState(0);38 useEffect(() => {39 const id = setInterval(() => {40 setCount((prevCount) => prevCount + 1);41 }, 1000);42 return () => clearInterval(id);43 }, []);44 const increment = () => setCount((prevCount) => prevCount + 1);45 return { count, increment };46};47import { useCounter } from './useCounter';48import { renderHook, act } from '@testing-library/react-hooks';49test('counter test', () => {50 const { result } = renderHook(() => useCounter());51 expect(result.current.count).toBe(0);52 act(() => {53 result.current.increment();54 });55 expect(result.current.count).toBe(1);56});57import { useEffect, useState } from 'react';
Using AI Code Generation
1import { renderHook } from '@testing-library/react-hooks';2import { useCustomHook } from './customHook';3describe('useCustomHook', () => {4 it('should remove cleanup method', () => {5 const { removeCleanup } = renderHook(() => useCustomHook());6 removeCleanup();7 });8});9import { useEffect } from 'react';10export const useCustomHook = () => {11 useEffect(() => {12 return () => {13 console.log('cleanup');14 };15 });16};17 √ should remove cleanup method (4ms)
Using AI Code Generation
1import { renderHook } from '@testing-library/react-hooks';2import { useCounter } from './useCounter';3describe('useCounter', () => {4 it('should increment counter by 1', () => {5 const { result } = renderHook(() => useCounter());6 result.current.increment();7 expect(result.current.count).toBe(1);8 });9 it('should decrement counter by 1', () => {10 const { result } = renderHook(() => useCounter());11 result.current.decrement();12 expect(result.current.count).toBe(-1);13 });14});15import { useState } from 'react';16import { act } from 'react-dom/test-utils';17export const useCounter = () => {18 const [count, setCount] = useState(0);19 const increment = () => setCount(count + 1);20 const decrement = () => setCount(count - 1);21 return {22 };23};24import { renderHook } from '@testing-library/react-hooks';25import { useCounter } from './useCounter';26describe('useCounter', () => {27 it('should increment counter by 1', () => {28 const { result, removeCleanup } = renderHook(() => useCounter());29 result.current.increment();30 removeCleanup();31 expect(result.current.count).toBe(1);32 });33 it('should decrement counter by 1', () => {34 const { result, removeCleanup } = renderHook(() => useCounter());35 result.current.decrement();36 removeCleanup();37 expect(result.current.count).toBe(-1);38 });39});40import { useState } from 'react';41import { act } from 'react-dom/test-utils';42export const useCounter = () => {43 const [count, setCount] = useState(0);44 const increment = () => setCount(count + 1);45 const decrement = () =>
Using AI Code Generation
1import { renderHook, cleanup } from "@testing-library/react-hooks";2import { useCounter } from "./useCounter";3afterEach(() => {4 cleanup();5});6test("should increment counter", () => {7 const { result } = renderHook(() => useCounter());8 expect(result.current.count).toBe(0);9 result.current.increment();10 expect(result.current.count).toBe(1);11});12import { useState, useCallback } from "react";13export const useCounter = () => {14 const [count, setCount] = useState(0);15 const increment = useCallback(() => {16 setCount((count) => count + 1);17 }, []);18 return { count, increment };19};20import { renderHook, cleanup } from "@testing-library/react-hooks";21import { useCounter } from "./useCounter";22afterEach(() => {23 cleanup();24});25test("should increment counter", () => {26 const { result } = renderHook(() => useCounter());27 expect(result.current.count).toBe(0);28 result.current.increment();29 expect(result.current.count).toBe(1);30});31import { renderHook, cleanup } from "@testing-library/react-hooks";32import { useCounter } from "./useCounter";33afterEach(() => {34 cleanup();35});36test("should increment counter", () => {37 const { result } = renderHook(() => useCounter());38 expect(result.current.count).toBe(0);39 result.current.increment();40 expect(result.current.count).toBe(1);41});
Using AI Code Generation
1import { renderHook, act } from '@testing-library/react-hooks'2import useCounter from './useCounter'3test('should increment counter', () => {4 const { result, unmount } = renderHook(() => useCounter())5 act(() => {6 result.current.increment()7 })8 expect(result.current.count).toBe(1)9 unmount()10})11import { useState, useEffect } from 'react'12export default function useCounter() {13 const [count, setCount] = useState(0)14 const increment = () => setCount(count + 1)15 useEffect(() => {16 const id = setInterval(() => {17 setCount(count => count + 1)18 }, 1000)19 return () => clearInterval(id)20 }, [])21 return { count, increment }22}23import { renderHook, act } from '@testing-library/react-hooks'24import useCounter from './useCounter'25test('should increment counter', () => {26 const { result } = renderHook(() => useCounter())27 act(() => {28 result.current.increment()29 })30 expect(result.current.count).toBe(1)31})32import { useState, useEffect } from 'react'33export default function useCounter() {34 const [count, setCount] = useState(0)35 const increment = () => setCount(count + 1)36 useEffect(() => {37 const id = setInterval(() => {38 setCount(count => count + 1)39 }, 1000)40 return () => clearInterval(id)41 }, [])42 return { count, increment }43}44import { renderHook, act } from '@testing-library/react-hooks'45import useCounter from './useCounter'46test('should increment counter', () => {47 const { result } = renderHook(() => useCounter())48 act(() => {49 result.current.increment()50 })51 expect(result.current.count).toBe(1)52})53import { useState, useEffect }
Check out the latest blogs from LambdaTest on this topic:
Most test automation tools just do test execution automation. Without test design involved in the whole test automation process, the test cases remain ad hoc and detect only simple bugs. This solution is just automation without real testing. In addition, test execution automation is very inefficient.
As part of one of my consulting efforts, I worked with a mid-sized company that was looking to move toward a more agile manner of developing software. As with any shift in work style, there is some bewilderment and, for some, considerable anxiety. People are being challenged to leave their comfort zones and embrace a continuously changing, dynamic working environment. And, dare I say it, testing may be the most ‘disturbed’ of the software roles in agile development.
ChatGPT broke all Internet records by going viral in the first week of its launch. A million users in 5 days are unprecedented. A conversational AI that can answer natural language-based questions and create poems, write movie scripts, write social media posts, write descriptive essays, and do tons of amazing things. Our first thought when we got access to the platform was how to use this amazing platform to make the lives of web and mobile app testers easier. And most importantly, how we can use ChatGPT for automated testing.
When software developers took years to create and introduce new products to the market is long gone. Users (or consumers) today are more eager to use their favorite applications with the latest bells and whistles. However, users today don’t have the patience to work around bugs, errors, and design flaws. People have less self-control, and if your product or application doesn’t make life easier for users, they’ll leave for a better solution.
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.
You could also refer to video tutorials over LambdaTest YouTube channel to get step by step demonstration from industry experts.
Get 100 minutes of automation test minutes FREE!!