KaneAI - World’s First E2E Software Testing Agent.Book a Demo Join TestMu Conference

How to use unmountHook method in testing-library-react-hooks

Best JavaScript code snippet using testing-library-react-hooks

registerSubApp.js

...85            parentStore = null;86            // å»é¤ååºç¨åå api æè½½87            delete Vue.prototype[`$${microName}Api`];88            // è°ç¨ååºç¨unmounté©åæ¹æ³89            unmountHook && isFunction(unmountHook) && unmountHook();90        }91    }92}93async function render(94    { microName, microRoutes, microMessages, microStore, microEl, routeMatch, __qiankun__, clearAxiosCancel },95    { routes, routerBase, container, i18n, parentStore }) {96    // çå¾ v2 æ¥å£é»è¾å¤çå®æï¼åè¿è¡è·¯ç±å¹éï¼å¦åæ¿ä¸å°ç¸å³æ°æ®97    const {98        state: { menu: { menuDataPromise } = ({} = {}) },99    } = parentStore || {};100    if (menuDataPromise) {101        try {102            await menuDataPromise;103        } catch (e) {...

index.ts

Source: index.ts

1import { CreateRenderer, Renderer, RenderResult, RenderHookOptions } from '../types'2import { asyncUtils } from './asyncUtils'3import { cleanup, addCleanup, removeCleanup } from './cleanup'4import { suppressErrorOutput } from './console'5function resultContainer<TValue>() {6  const results: Array<{ value?: TValue; error?: Error }> = []7  const resolvers: Array<() => void> = []8  const result: RenderResult<TValue> = {9    get all() {10      return results.map(({ value, error }) => error ?? (value as TValue))11    },12    get current() {13      const { value, error } = results[results.length - 1] ?? {}14      if (error) {15        throw error16      }17      return value as TValue18    },19    get error() {20      const { error } = results[results.length - 1] ?? {}21      return error22    }23  }24  const updateResult = (value?: TValue, error?: Error) => {25    results.push({ value, error })26    resolvers.splice(0, resolvers.length).forEach((resolve) => resolve())27  }28  return {29    result,30    addResolver: (resolver: () => void) => {31      resolvers.push(resolver)32    },33    setValue: (value: TValue) => updateResult(value),34    setError: (error: Error) => updateResult(undefined, error)35  }36}37function createRenderHook<38  TProps,39  TResult,40  TRendererOptions extends object,41  TRenderer extends Renderer<TProps>42>(createRenderer: CreateRenderer<TProps, TResult, TRendererOptions, TRenderer>) {43  const renderHook = (44    callback: (props: TProps) => TResult,45    options = {} as RenderHookOptions<TProps> & TRendererOptions46  ) => {47    const { result, setValue, setError, addResolver } = resultContainer<TResult>()48    const renderProps = { callback, setValue, setError }49    let hookProps = options.initialProps50    const { render, rerender, unmount, act, ...renderUtils } = createRenderer(renderProps, options)51    render(hookProps)52    const rerenderHook = (newProps = hookProps) => {53      hookProps = newProps54      rerender(hookProps)55    }56    const unmountHook = () => {57      removeCleanup(unmountHook)58      unmount()59    }60    addCleanup(unmountHook)61    return {62      result,63      rerender: rerenderHook,64      unmount: unmountHook,65      ...asyncUtils(act, addResolver),66      ...renderUtils67    }68  }69  return renderHook70}...

HOOKS.js

Source: HOOKS.js

1import React, { useState, useEffect } from 'react'2const useMounted = () => {3  const [mounted, setMounted] = useState(false)4  const mountedHook = () => {5    console.log('mounted')6    setMounted(true)7  }8  const unmountHook = () => {9    console.log('unmount')10    setMounted(false)11  }12  useEffect(() => {13    !mounted && mountedHook()14    return unmountHook15  }, [])16  return mounted17}18export default function HOOKS() {19  const [count, setCount] = useState(0)20  const componentDidUpdate = () => {21    console.log('update')22  }23  const mounted = useMounted()24  useEffect(() => {25    mounted && componentDidUpdate()26  })27  return (28    <div>29      you has clicked {count} times30      <div>31        <button onClick={() => void setCount(count + 1)}>Click</button>32      </div>33    </div>34  )...

Using AI Code Generation

1import { unmountHook } from '@testing-library/react-hooks';2import { renderHook } from '@testing-library/react-hooks';3import { act } from '@testing-library/react-hooks';4import { cleanup } from '@testing-library/react-hooks';5import { fireEvent } from '@testing-library/react-hooks';6import { render } from '@testing-library/react-hooks';7import { waitForElementToBeRemoved } from '@testing-library/react-hooks';8import { waitForDomChange } from '@testing-library/react-hooks';9import { waitForElement } from '@testing-library/react-hooks';10import { waitForElementToBeRemoved } from '@testing-library/react-hooks';11import { waitFor } from '@testing-library/react-hooks';12import { within } from '@testing-library/react-hooks';13import { wait } from '@testing-library/react-hooks';14import { screen } from '@testing-library/react-hooks';15import { prettyDOM } from '@testing-library/react-hooks';16import { queryHelpers } from '@testing-library/react-hooks';17import { queryByAttribute } from '@testing-library/react-hooks';18import { queryAllByAttribute } from '@testing-library/react-hooks';19import { queryByDisplayValue } from '@testing-library/react-hooks';20import { queryAllByDisplayValue } from '@testing-library

Using AI Code Generation

1import { unmountHook } from 'react-hooks-testing-library';2import { renderHook } from 'react-hooks-testing-library';3import { act } from 'react-hooks-testing-library';4import { cleanup } from 'react-hooks-testing-library';5import { useCounter } from '../hooks/useCounter';6afterEach(cleanup);7afterEach(() => {8  unmountHook();9  cleanup();10});11test('should increment counter', () => {12  const { result } = renderHook(() => useCounter());13  act(() => {14    result.current.increment();15  });16  expect(result.current.count).toBe(1);17});18test('should decrement counter', () => {19  const { result } = renderHook(() => useCounter());20  act(() => {21    result.current.decrement();22  });23  expect(result.current.count).toBe(-1);24});25test('should reset counter', () => {26  const { result } = renderHook(() => useCounter());27  act(() => {28    result.current.increment();29    result.current.increment();30    result.current.reset();31  });32  expect(result.current.count).toBe(0);33});34test('should set initial count', () => {35  const { result } = renderHook(() => useCounter(5));36  expect(result.current.count).toBe(5);37});38test('should set initial count and step', () => {

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});12export const useCounter = () => {13  const [count, setCount] = useState(0);14  const increment = () => {15    setCount(count + 1);16  };17  return {18  };19};20import { useCounter } from './useCounter';21const App = () => {22  const { count, increment } = useCounter();23  return (24      <h1>{count}</h1>25      <button onClick={increment}>Increment</button>26  );27};28export default App;29import { renderHook, act, waitForNextUpdate } from '@testing-library/react-hooks';30import { useCounter } from './useCounter';31describe('useCounter', () => {32  it('should increment counter', () => {33    const { result, waitForNextUpdate } = renderHook(() => useCounter());34    act(() => {35      result.current.increment();36    });37    expect(result.current.count).toBe(1);38  });39  it('should fetch data', async () => {40    const { result, waitForNextUpdate } = renderHook(() => useCounter());41    await waitForNextUpdate();42    expect(result.current.data).toEqual({ title: 'hello' });43  });44});45export const useCounter = () => {46  const [count, setCount] = useState(0);

Using AI Code Generation

1import { renderHook, act } from "@testing-library/react-hooks";2import { unmountHook } from "react-hooks-testing-library";3import { useCounter } from "./useCounter";4const { result, unmount } = renderHook(() => useCounter());5test("should increment counter", () => {6  act(() => {7    result.current.increment();8  });9  expect(result.current.count).toBe(1);10});11test("should decrement counter", () => {12  act(() => {13    result.current.decrement();14  });15  expect(result.current.count).toBe(-1);16});17test("should reset counter", () => {18  act(() => {19    result.current.reset();20  });21  expect(result.current.count).toBe(0);22});23test("should unmount hook", () => {24  unmount();25  expect(unmountHook).toHaveBeenCalled();26});27import { useState } from "react";28export const useCounter = () => {29  const [count, setCount] = useState(0);30  const increment = () => setCount(count + 1);31  const decrement = () => setCount(count - 1);32  const reset = () => setCount(0);33  return { count, increment, decrement, reset };34};35import { renderHook, act } from "@testing-library/react-hooks";36import { useCounter } from "./useCounter";37test("should increment counter", () => {38  const { result } = renderHook(() => useCounter());39  act(() => {40    result.current.increment();41  });42  expect(result.current.count).toBe(1);43});44test("should decrement counter", () => {45  const { result } = renderHook(() => useCounter());46  act(() => {47    result.current.decrement();48  });49  expect(result.current.count).toBe(-1);50});51test("should reset counter", () => {52  const { result } = renderHook(() => useCounter());53  act(() => {54    result.current.reset();55  });56  expect(result.current.count).toBe(0);57});58import { useState } from "react";59export const useCounter = () => {60  const [count, setCount] = useState(0);61  const increment = () => setCount(count + 1);62  const decrement = () => setCount(count - 1);63  const reset = () => setCount(0);

Using AI Code Generation

1import { renderHook } from '@testing-library/react-hooks'2import { useCounter } from '../hooks/useCounter'3describe('useCounter', () => {4  it('should increment counter', () => {5    const { result } = renderHook(() => useCounter())6    expect(counter).toBe(0)7    expect(typeof increment).toBe('function')8    expect(typeof decrement).toBe('function')9    increment()10    expect(counter).toBe(1)11  })12})13import { renderHook } from '@testing-library/react-hooks'14import { useCounter } from '../hooks/useCounter'15describe('useCounter', () => {16  it('should increment counter', () => {17    const { result } = renderHook(() => useCounter())18    expect(counter).toBe(0)19    expect(typeof increment).toBe('function')20    expect(typeof decrement).toBe('function')21    increment()22    expect(counter).toBe(1)23  })24})25import { renderHook } from '@testing-library/react-hooks'26import { useCounter } from '../hooks/useCounter'27describe('useCounter', () => {28  it('should increment counter', () => {29    const { result } = renderHook(() => useCounter())30    expect(counter).toBe(0)31    expect(typeof increment).toBe('function')32    expect(typeof decrement).toBe('function')33    increment()34    expect(counter).toBe(1)35  })36})37import { renderHook } from '@testing-library/react-hooks'38import { useCounter } from '../hooks/useCounter'39describe('useCounter', () => {40  it('should increment counter', () => {41    const { result } = renderHook(() => useCounter())42    expect(counter).toBe(0)43    expect(typeof increment).toBe('function')44    expect(typeof decrement).toBe('function')45    increment()46    expect(counter).toBe(1)47  })48})

Using AI Code Generation

1import { unmountHook } from "react-hooks-testing-library";2import { cleanup } from "@testing-library/react";3import { cleanup as cleanupHooks } from "react-hooks-testing-library";4describe("Test 1", () => {5  afterEach(() => {6    cleanup();7    cleanupHooks();8    unmountHook();9  });10  it("Test 1", () => {11    const { result } = renderHook(() => useGetUserList());12    expect(result.current).toEqual([]);13  });14});15import { unmountHook } from "react-hooks-testing-library";16import { cleanup } from "@testing-library/react";17import { cleanup as cleanupHooks } from "react-hooks-testing-library";18describe("Test 2", () => {19  afterEach(() => {20    cleanup();21    cleanupHooks();22    unmountHook();23  });24  it("Test 2", () => {25    const { result } = renderHook(() => useGetUserList());26    expect(result.current).toEqual([]);27  });28});29import { unmountHook } from "react-hooks-testing-library";30import { cleanup } from "@testing-library/react";31import { cleanup as cleanupHooks } from "react-hooks-testing-library";32describe("Test 3", () => {33  afterEach(() => {34    cleanup();35    cleanupHooks();36    unmountHook();37  });38  it("Test 3", () => {39    const { result } = renderHook(() => useGetUserList());40    expect(result.current).toEqual([]);41  });42});43import { unmountHook } from "react-hooks-testing-library";44import { cleanup } from "@testing-library/react";45import { cleanup as cleanupHooks } from "react-hooks-testing-library";46describe("Test 4", ()

Using AI Code Generation

1import { unmountHook } from 'react-hooks-testing-library';2import { useFetch } from './useFetch';3describe('useFetch', () => {4  it('should set loading to true', () => {5    expect(result.current.loading).toBe(true);6  });7  it('should set loading to false after data is fetched', async () => {8    const { result, waitForNextUpdate } = renderHook(() =>9    );10    await waitForNextUpdate();11    expect(result.current.loading).toBe(false);12  });13  it('should set error to true when fetch fails', async () => {14    const { result, waitForNextUpdate } = renderHook(() =>15    );16    await waitForNextUpdate();17    expect(result.current.error).toBe(true);18  });19  it('should set error to false when fetch succeeds', async () => {20    const { result, waitForNextUpdate } = renderHook(() =>21    );22    await waitForNextUpdate();23    expect(result.current.error).toBe(false);24  });25  it('should set data to the data returned from fetch', async () => {26    const { result, waitForNextUpdate } = renderHook(() =>27    );28    await waitForNextUpdate();29    expect(result.current.data).toEqual({ posts: [{ title: 'test' }] });30  });31  it('should set data to null when fetch fails', async () => {32    const { result, waitForNextUpdate } = renderHook(() =>33    );34    await waitForNextUpdate();35    expect(result.current.data).toBe(null);36  });37});38import { unmountHook } from 'react-hooks-testing-library';39import { useFetch } from './useFetch';40describe('useFetch', () => {41  it('should set loading to true', () => {42    expect(result.current.loading).toBe(true);43  });44  it('should set loading to false after data is fetched', async () => {

Using AI Code Generation

1import { unmountHook } from 'testing-library-react-hooks';2import { useFetch } from './useFetch';3describe('useFetch', () => {4  it('should return data', async () => {5    let result;6    await act(async () => {7      unmountHook();8    });9    expect(result.current.data.title).toBe('sunt aut facere repellat provident occaecati excepturi optio reprehenderit');10  });11});12import { useState, useEffect } from 'react';13export const useFetch = (url) => {14  const [data, setData] = useState(null);15  const [loading, setLoading] = useState(true);16  const [error, setError] = useState(null);17  useEffect(() => {18    const fetchData = async () => {19      try {20        const response = await fetch(url);21        const json = await response.json();22        setData(json);23        setLoading(false);24      } catch (error) {25        setError(error);26      }27    };28    fetchData();29  }, [url]);30  return { data, loading, error };31};32import React from 'react';33import { render, screen } from '@testing-library/react';34import { Footer } from './Footer';35import { fetchUser } from '../../utils/fetchUser';36jest.mock('../../utils/fetchUser');37describe('Footer', () => {38  test('should render Footer', () => {39    render(<Footer />);40    expect(screen.getByText('Footer')).toBeInTheDocument();41  });42  test('should render user name', () => {43    fetchUser.mockImplementation(() => {44      return Promise.resolve({45      });46    });47    render(<Footer />);48    expect(screen.getByText('John Doe')).toBeInTheDocument();49  });50});51import axios from 'axios

Using AI Code Generation

1import { unmountHook } from '@testing-library/react-hooks'2import { renderHook } from '@testing-library/react-hooks'3import { useSomeHook } from './someHook'4test('some test', () => {5  const { result, unmount } = renderHook(() => useSomeHook())6  unmountHook()7})8import { useState } from 'react'9const useSomeHook = () => {10  const [state, setState] = useState('some value')11}12export { useSomeHook }

Blogs

Check out the latest blogs from LambdaTest on this topic:

How to Position Your Team for Success in Estimation

Estimates are critical if you want to be successful with projects. If you begin with a bad estimating approach, the project will almost certainly fail. To produce a much more promising estimate, direct each estimation-process issue toward a repeatable standard process. A smart approach reduces the degree of uncertainty. When dealing with presales phases, having the most precise estimation findings can assist you to deal with the project plan. This also helps the process to function more successfully, especially when faced with tight schedules and the danger of deviation.

Testing in Production: A Detailed Guide

When most firms employed a waterfall development model, it was widely joked about in the industry that Google kept its products in beta forever. Google has been a pioneer in making the case for in-production testing. Traditionally, before a build could go live, a tester was responsible for testing all scenarios, both defined and extempore, in a testing environment. However, this concept is evolving on multiple fronts today. For example, the tester is no longer testing alone. Developers, designers, build engineers, other stakeholders, and end users, both inside and outside the product team, are testing the product and providing feedback.

How To Automate Desktops Apps Using WinAppDriver

Migrating Test Automation Suite To Cypress 10

There are times when developers get stuck with a problem that has to do with version changes. Trying to run the code or test without upgrading the package can result in unexpected errors.

How To Run Cypress Tests In Azure DevOps Pipeline

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.

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.