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

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

AXClasses.py

Source:AXClasses.py

...1002        """Convenience method to wait for a sheet to appear.1003        Returns: the sheet that appeared (element) or None1004        """1005        return self.waitForCreation(timeout, 'AXSheetCreated')1006    def waitForValueToChange(self, timeout=10):1007        """Convenience method to wait for value attribute of given element to1008        change.1009        Some types of elements (e.g. menu items) have their titles change,1010        so this will not work for those.  This seems to work best if you set1011        the notification at the application level.1012        Returns: Element or None1013        """1014        # Want to identify that the element whose value changes matches this1015        # object's.  Unique identifiers considered include role and position1016        # This seems to work best if you set the notification at the application1017        # level1018        callback = AXCallbacks.returnElemCallback1019        retelem = None1020        return self.waitFor(timeout, 'AXValueChanged', callback=callback, args=(retelem,))...

test.js

Source:test.js

...13            {14                options: { helloWorld: true }15            }16        )17        await waitForValueToChange(() => result.current.isLoading)18        expect(result.all).toMatchSnapshot()19    })20    test('getting from the cache', async () => {21        const { result } = renderHook(22            () => useThing(23                'EWhateverEntity',24                () => Promise.resolve('NEVER')25            ),26            { wrapper },27            {28                options: { helloWorld: true }29            }30        )31        expect(result.current.data).toBe('hello world')32    })33    test('dependend queries', async () => {34        const { result, waitForValueToChange } = renderHook(35            () => useThing(36                'EDependendEntity1',37                () => Promise.resolve('Cool, isn\'t it? ð')38            ),39            { wrapper }40        )41        await waitForValueToChange(() => result.current.isLoading)42        const { result: result2 } = renderHook(43            () => useThing(44                'EDependendEntity2',45                ({ options }) => Promise.resolve(`This text is passed through options from dependent entity "${options}"`),46                {47                    skip: result.current.isLoading || result.current.isInitial,48                    options: result.current.data49                }50            ),51            { wrapper }52        )53        await waitForValueToChange(() => result2.current.isLoading)54        expect(result2.current.data).toBe('This text is passed through options from dependent entity "Cool, isn\'t it? ð"')55    })56    test('initialData feature', async () => {57        const { result, waitForValueToChange } = renderHook(58            () => useThing(59                'EInitialDataEntity',60                () => Promise.resolve('Not initial anymore ð'),61                {62                    initialData: ({ length = 5 }) => Array.from({ length }).map(() => 'A'),63                    options: {64                        length: 265                    }66                }67            ),68            { wrapper }69        )70        expect(result.current.data).toEqual(['A', 'A'])71        await waitForValueToChange(() => result.current.isLoading)72    })73    test('dataMapper feature', async () => {74        const { result, waitForValueToChange } = renderHook(75            () => useThing(76                'EDataMapper',77                () => Promise.resolve([2, 4, 8]),78                {79                    initialData: [],80                    dataMapper: data => data.map(el => el * 2)81                }82            ),83            { wrapper }84        )85        await waitForValueToChange(() => result.current.isLoading)86        expect(result.current.mappedData).toEqual([4, 8, 16])87    })88    test('prevent multi fetching', async () => {89        let counter = 090        const { result, waitForValueToChange } = renderHook(91            () => useThing(92                'EMultiFetchingEntity',93                () => {94                    counter += 195                    return Promise.resolve(counter)96                },97                {98                    options: { multiFetching: true }99                }100            ),101            { wrapper }102        )103        const { result: result2 } = renderHook(104            () => useThing(105                'EMultiFetchingEntity',106                () => {107                    counter += 1108                    return Promise.resolve(counter)109                },110                {111                    options: { multiFetching: true }112                }113            ),114            { wrapper }115        )116        const { result: result3 } = renderHook(117            () => useThing(118                'EMultiFetchingEntity',119                () => {120                    counter += 1121                    return Promise.resolve(counter)122                },123                {124                    options: { multiFetching: true }125                }126            ),127            { wrapper }128        )129        await waitForValueToChange(() => result.current.isLoading)130        expect(result.current.data).toEqual(1)131        expect(result2.current.data).toEqual(1)132        expect(result3.current.data).toEqual(1)133    })134    test('fetchMore feature', async () => {135        const MAX_ITEMS = 10136        const reducer = (state, { type, payload: data }, { toType }) => {137            if (type === toType(useThing.Types.Fulfilled)) {138                return {139                    ...state,140                    data: [141                        ...(state?.data || []),142                        ...(data || [])143                    ]144                }145            }146            return state || {}147        }148        const { result, waitForValueToChange } = renderHook(149            () => useThing(150                'TFetchMoreEntity',151                ({ options: { limit, offset } }) => Promise.resolve(152                    Array153                        .from({ length: 10 })154                        .map((_, index) => index)155                        .slice(offset, limit + offset)156                ),157                {158                    initialData: [],159                    getFetchMore: ({ options: { limit, offset } }) => {160                        if (limit + offset < MAX_ITEMS) {161                            return { limit, offset: offset + limit }162                        }163                        return false164                    },165                    reducer,166                    options: {167                        limit: 5,168                        offset: 0169                    }170                }171            ),172            { wrapper }173        )174        await waitForValueToChange(() => result.current.isLoading)175        act(() => {176            result.current.fetchMore()177        })178        await waitForValueToChange(() => result.current.isLoading)179        expect(result.current.data.length).toBe(10)180        act(() => {181            result.current.fetchMore()182        })183        expect(result.current.data.length).toBe(10)184    })185    test('refetch feature', async () => {186        const { result, waitForValueToChange } = renderHook(187            () => useThing(188                'TRefetchEntity',189                () => Promise.resolve('hello world')190            ),191            { wrapper },192            {193                options: { helloWorld: true }194            }195        )196        await waitForValueToChange(() => result.current.isLoading)197        act(() => {198            result.current.refetch()199        })200        await waitForValueToChange(() => result.current.isLoading)201        expect(result.all).toMatchSnapshot()202    })203    test('debounce options changing', async () => {204        jest.useFakeTimers('modern')205        const debounceInterval = 1000206        const callback = jest.fn().mockImplementation(({ options }) => Promise.resolve(options))207        const { result, rerender, waitForValueToChange } = renderHook(208            props => useThing(209                'TDebounce',210                callback,211                {212                    ...props,213                    reducer: (state, { type, payload: data }, { toType }) => {214                        if (type === toType('fulfilled')) {215                            return {216                                ...state,217                                data: {218                                    ...state.data,219                                    [data.count]: data220                                }221                            }222                        }223                        return state || {}224                    },225                    selector: (state, { key, options }) => (226                        state?.[key]?.data?.[options.count] || null227                    )228                }229            ),230            {231                wrapper,232                initialProps: {233                    debounceInterval,234                    options: {235                        count: 1236                    }237                }238            }239        )240        await waitForValueToChange(() => result.current.isLoading)241        expect(result.current.data.count).toBe(1)242        expect(callback).toHaveBeenCalledTimes(1)243        rerender({244            debounceInterval,245            options: {246                count: 2247            }248        })249        rerender({250            debounceInterval,251            options: {252                count: 3253            }254        })255        rerender({256            debounceInterval,257            options: {258                count: 4259            }260        })261        act(() => jest.runAllTimers())262        await waitForValueToChange(() => result.current.isLoading)263        expect(callback).toHaveBeenCalledTimes(2)264        expect(result.current.data.count).toBe(4)265        jest.useRealTimers()266    })267    test('object reducer', async () => {268        const { result, waitForValueToChange } = renderHook(269            () => useThing(270                'TObjectReducer',271                () => Promise.resolve('hello world'),272                {273                    reducer: {274                        dictionary: {275                            fulfilled: (state, { payload }) => ({276                                ...state,277                                data: {278                                    hello: payload279                                }280                            })281                        }282                    }283                }284            ),285            { wrapper },286            {287                options: { helloWorld: true }288            }289        )290        await waitForValueToChange(() => result.current.isLoading)291        expect(result.current.data.hello).toBe('hello world')292    })293    test('extend actions in return', async () => {294        const { result, waitForValueToChange } = renderHook(295            () => useThing(296                'TActions',297                () => Promise.resolve('hello world'),298                {299                    reducer: {300                        dictionary: {301                            fulfilled: (state, { payload }) => ({302                                ...state,303                                data: {304                                    hello: payload305                                }306                            }),307                            additionalAction: state => ({308                                ...state,309                                data: {310                                    hello: 'additional action'311                                }312                            })313                        }314                    }315                }316            ),317            { wrapper },318            {319                options: { helloWorld: true }320            }321        )322        await waitForValueToChange(() => result.current.isLoading)323        expect(result.current.actions.pending).toBeInstanceOf(Function)324        expect(result.current.actions.fulfilled).toBeInstanceOf(Function)325        expect(result.current.actions.error).toBeInstanceOf(Function)326        expect(result.current.actions.additionalAction).toBeInstanceOf(Function)327    })...

useGameState.spec.ts

Source:useGameState.spec.ts

...1415      moves.forEach(async (move) => {16        act(() => result.current.computeMove(move));1718        await waitForValueToChange(() => result.current.nextPlayer);19      });2021      expect(result.current.currentBoard).toEqual([22        "X", "O", "X",23        null, null, null,24        null, null, null25      ]);26    });27  });2829  describe("when the match is restarted", () => {30    const moves = [0, 1, 2, 3, 4, 5];31    let res: RenderResult<UseGameStateResult>;3233    beforeAll(async () => {34      const { result, waitForValueToChange } = renderHook(() => useGameState());35      res = result;3637      moves.forEach(async (move) => {38        act(() => result.current.computeMove(move));3940        await waitForValueToChange(() => result.current.nextPlayer);41      });4243      act(() => result.current.restartGame());44    });4546    it("should reset the board", () => {47      expect(res.current.currentBoard).toEqual([48        null, null, null,49        null, null, null,50        null, null, null51      ]);52    });5354    it("should reset step count", () => {55      expect(res.current.stepNumber).toBe(0);56    });57  });5859  describe('when "X" is the winner', () => {60    const testCases = [61      [[0, 3, 1, 4, 2]],62      [[0, 3, 4, 5, 8]],63      [[6, 1, 7, 2, 8]],64      [[0, 4, 3, 2, 6]],65      [[1, 3, 4, 6, 7]],66      [[2, 0, 5, 1, 8]],67      [[0, 7, 4, 6, 8]],68      [[2, 1, 4, 0, 6]]69    ];7071    it.each(testCases)("with %p moves", (moves) => {72      const { result, waitForValueToChange } = renderHook(() => useGameState());7374      moves.forEach(async (move) => {75        act(() => result.current.computeMove(move));7677        await waitForValueToChange(() => result.current.nextPlayer);78      });7980      expect(result.current.winner).toBe("X");81    });82  });8384  describe('when "O" is the winner', () => {85    const testCases = [86      [[3, 0, 4, 1, 6, 2]],87      [[0, 3, 1, 4, 6, 5]],88      [[0, 6, 1, 7, 3, 8]],89      [[1, 0, 2, 3, 7, 6]],90      [[8, 1, 6, 4, 0, 7]],91      [[0, 2, 1, 5, 4, 8]],92      [[6, 0, 7, 4, 1, 8]],93      [[0, 2, 1, 4, 8, 6]]94    ];9596    it.each(testCases)("with %p moves", (moves) => {97      const { result, waitForValueToChange } = renderHook(() => useGameState());9899      moves.forEach(async (move) => {100        act(() => result.current.computeMove(move));101102        await waitForValueToChange(() => result.current.nextPlayer);103      });104105      expect(result.current.winner).toBe("O");106    });107  });108109  describe("when the match ends in a draw", () => {110    const moves = [2, 1, 4, 6, 5, 8, 7, 3, 0];111112    it(`with ${moves.toString()} moves`, () => {113      const { result, waitForValueToChange } = renderHook(() => useGameState());114115      moves.forEach(async (move) => {116        act(() => result.current.computeMove(move));117118        await waitForValueToChange(() => result.current.nextPlayer);119      });120121      expect(result.current.draw).toBe(true);122    });123  });
...

useTransactions.test.js

Source:useTransactions.test.js

...26    const { result, waitForValueToChange } = renderHook(27      () => useTransactions(),28      { wrapper },29    )30    await waitForValueToChange(() => result.current.data)31    expect(result.current.data).toStrictEqual(getTransactionsReturn)32    expect(mockGetTransactions).toHaveBeenCalledTimes(1)33  })34  it('should post data correctly', async () => {35    const { result, waitForValueToChange } = renderHook(36      () => useTransactions(),37      { wrapper },38    )39    expect(mockPostTransactions).not.toHaveBeenCalled()40    const newTransaction = 241    act(() => {42      result.current.post(newTransaction)43    })44    await waitForValueToChange(() => result.current.data)45    expect(result.current.data).toStrictEqual([46      ...getTransactionsReturn,47      newTransaction,48    ])49    expect(mockPostTransactions).toHaveBeenCalledTimes(1)50  })51  it('should call callback on post', async () => {52    const { result, waitForValueToChange } = renderHook(53      () => useTransactions(),54      { wrapper },55    )56    const newTransaction = 257    const callback = jest.fn()58    expect(callback).not.toHaveBeenCalled()59    act(() => {60      result.current.post(newTransaction, callback)61    })62    await waitForValueToChange(() => result.current.data)63    expect(callback).toHaveBeenCalledTimes(1)64  })...

Using AI Code Generation

1import React from 'react';2import { render, screen } from '@testing-library/react';3import App from './App';4import userEvent from '@testing-library/user-event';5import { waitForValueToChange } from '@testing-library/react-hooks';6test('renders learn react link', async () => {7  render(<App />);8  const linkElement = screen.getByText(/learn react/i);9  expect(linkElement).toBeInTheDocument();10  userEvent.click(linkElement);11  const count = screen.getByText(/Count/i);12  expect(count).toBeInTheDocument();13  await waitForValueToChange(() => count);14  expect(count).toHaveTextContent('Count: 1');15});16import React from 'react';17import logo from './logo.svg';18import './App.css';19import useCounter from './useCounter';20function App() {21  const [count, increment] = useCounter();22  return (23        <img src={logo} className="App-logo" alt="logo" />24          <button onClick={increment}>Increment</button>25        <p>Count: {count}</p>26  );27}28export default App;29import { useState } from 'react';30const useCounter = () => {31  const [count, setCount] = useState(0);32  const increment = () => setCount(count + 1);33  return [count, increment];34};35export default useCounter;36import '@testing-library/jest-dom/extend-expect';37{38  "dependencies": {

Using AI Code Generation

1import { renderHook, act } from '@testing-library/react-hooks'2import { useCounter } from './counter'3test('should increment counter', async () => {4  const { result, waitForValueToChange } = renderHook(() => useCounter())5  act(() => result.current.increment())6  await waitForValueToChange(() => result.current.count)7  expect(result.current.count).toBe(1)8})9import { useState } from 'react'10export const useCounter = () => {11  const [count, setCount] = useState(0)12  const increment = () => setCount(count + 1)13  return { count, increment }14}15import { renderHook, act } from '@testing-library/react-hooks'16import { useCounter } from './counter'17test('should increment counter', async () => {18  const { result, waitForNextUpdate } = renderHook(() => useCounter())19  act(() => result.current.increment())20  await waitForNextUpdate()21  expect(result.current.count).toBe(1)22})23import { useState } from 'react'24export const useCounter = () => {25  const [count, setCount] = useState(0)26  const increment = () => setCount(count + 1)27  return { count, increment }28}29import { renderHook, act } from '@testing-library/react-hooks'30import { useCounter } from './counter'31test('should increment counter', async () => {32  const { result, waitForNextUpdate } = renderHook(() => useCounter())33  act(() => result.current.increment())34  await waitForNextUpdate()35  expect(result.current.count).toBe(1)36})37import { useState } from 'react'38export const useCounter = () => {39  const [count, setCount] = useState(0)40  const increment = () => setCount(count + 1)41  return { count, increment }42}43import { renderHook, act } from '@testing-library/react-hooks'44import { useCounter } from './counter'45test('should increment counter', async () => {46  const {

Using AI Code Generation

1import { renderHook, act } from "@testing-library/react-hooks";2import { useCounter } from "./counter";3describe("useCounter", () => {4  it("should increment the 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 the counter", () => {12    const { result } = renderHook(() => useCounter());13    act(() => {14      result.current.decrement();15    });16    expect(result.current.count).toBe(-1);17  });18  it("should increment the counter after 1 second", async () => {19    const { result, waitForValueToChange } = renderHook(() => useCounter());20    act(() => {21      result.current.incrementDelayed();22    });23    await waitForValueToChange(() => result.current.count);24    expect(result.current.count).toBe(1);25  });26});

Using AI Code Generation

1import { renderHook, act } from '@testing-library/react-hooks';2import useCounter from './counter';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  it('should increment counter after 1 second', async () => {19    const { result, waitForValueToChange } = renderHook(() => useCounter());20    act(() => {21      result.current.incrementAsync();22    });23    await waitForValueToChange(() => result.current.count);24    expect(result.current.count).toBe(1);25  });26});27import { useState, useCallback } from 'react';28export default function useCounter() {29  const [count, setCount] = useState(0);30  const increment = useCallback(() => {31    setCount((count) => count + 1);32  }, []);33  const decrement = useCallback(() => {34    setCount((count) => count - 1);35  }, []);36  const incrementAsync = useCallback(() => {37    setTimeout(() => {38      setCount((count) => count + 1);39    }, 1000);40  }, []);41  return { count, increment, decrement, incrementAsync };42}43import { renderHook, act } from '@testing-library/react-hooks';44import useCounter from './counter';45describe('useCounter', () => {46  it('should increment counter', () => {47    const { result } = renderHook(() => useCounter());

Using AI Code Generation

1import { waitForValueToChange } from '@testing-library/react-hooks'2import { renderHook } from '@testing-library/react-hooks'3import { useFetch } from './useFetch'4it('should fetch data', async () => {5  await waitForValueToChange(() => result.current.data)6  expect(result.current.data).toEqual({ userId: 1, id: 1, title: 'delectus aut autem', completed: false })7})8import { useState, useEffect } from 'react'9import axios from 'axios'10export const useFetch = (url) => {11  const [data, setData] = useState(null)12  const [error, setError] = useState(null)13  const [loading, setLoading] = useState(true)14  useEffect(() => {15    const fetchData = async () => {16      try {17        const response = await axios.get(url)18        setData(response.data)19      } catch (error) {20        setError(error)21      } finally {22        setLoading(false)23      }24    }25    fetchData()26  }, [url])27  return { data, error, loading }28}29import { renderHook } from '@testing-library/react-hooks'30import { useFetch } from './useFetch'31it('should fetch data', async () => {32  await waitForNextUpdate()33  expect(result.current.data).toEqual({

Using AI Code Generation

1import { renderHook } from '@testing-library/react-hooks';2import { useCounter } from './useCounter';3test('should use custom hook', async () => {4  const { result, waitForValueToChange } = renderHook(() => useCounter());5  expect(result.current.count).toBe(0);6  result.current.increment();7  expect(result.current.count).toBe(1);8  await waitForValueToChange(() => result.current.count);9  expect(result.current.count).toBe(2);10});11import { useState } from 'react';12export const useCounter = () => {13  const [count, setCount] = useState(0);14  const increment = () => {15    setTimeout(() => {16      setCount(count + 1);17    }, 1000);18  };19  return {20  };21};

Using AI Code Generation

1import { render, waitForValueToChange } from '@testing-library/react-hooks'2import useFetch from './useFetch'3test('should return the data', async () => {4  await waitForNextUpdate()5  expect(result.current.data).toEqual('data')6})7import { useState } from 'react'8export default function useFetch(url) {9  const [data, setData] = useState(null)10  useEffect(() => {11    fetch(url).then(res => res.text()).then(data => setData(data))12  }, [url])13  return { data }14}15import { render, waitForValueToChange } from '@testing-library/react-hooks'16import useFetch from './useFetch'17test('should return the data', async () => {18  await waitForNextUpdate()19  expect(result.current.data).toEqual('data')20})21import { useState } from 'react'22export default function useFetch(url) {23  const [data, setData] = useState(null)24  useEffect(() => {25    fetch(url).then(res => res.text()).then(data => setData(data))26  }, [url])27  return { data }28}29import { render, waitForValueToChange } from '@testing-library/react-hooks'30import useFetch from './useFetch'31test('should return the data', async () => {32  await waitForValueToChange(() => result.current.data)33  expect(result.current.data).toEqual('data')34})35import { useState } from 'react'36export default function useFetch(url) {37  const [data, setData] = useState(null)38  useEffect(() => {39    fetch(url).then

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