How to use mockFetchAPI method in Best

Best JavaScript code snippet using best

index.spec.ts

Source:index.spec.ts

1import { requestMultipleJSONUrls, FetchAPI } from './index';2import * as async from 'async';3describe('requestMultipleJSONUrls', () => {4  let parallelLimitSpy: jest.SpyInstance;5  const exampleUrls = [6    'https://ft-tech-test-example.s3-eu-west-1.amazonaws.com/ftse-fsi.json',7    'https://ft-tech-test-example.s3-eu-west-1.amazonaws.com/gbp-hkd.json',8    'https://ft-tech-test-example.s3-eu-west-1.amazonaws.com/gbp-usd.json',9  ];10  const mockFetchJSONResponse = jest.fn();11  const mockFetchAPI = async () => {12    return {13      json: await mockFetchJSONResponse,14    };15  };16  beforeEach(() => {17    parallelLimitSpy = jest.spyOn(async, 'parallelLimit');18    mockFetchJSONResponse.mockReset();19  });20  it('should fetch multiple urls and retrieve them in order', async () => {21    mockFetchJSONResponse22      .mockReturnValueOnce({ data: 0 })23      .mockReturnValueOnce({ data: 1 })24      .mockReturnValueOnce({ data: 2 });25    const results = await requestMultipleJSONUrls(exampleUrls, {26      fetch: mockFetchAPI as unknown as FetchAPI,27    });28    expect(results.length).toEqual(exampleUrls.length);29    expect(results[0]).toEqual({ data: 0 });30    expect(results[1]).toEqual({ data: 1 });31    expect(results[2]).toEqual({ data: 2 });32  });33  it('should throw an error in case of an error', async () => {34    mockFetchJSONResponse35      .mockReturnValueOnce({ data: 0 })36      .mockImplementationOnce(() => {37        throw 'Error';38      })39      .mockReturnValueOnce({ data: 2 });40    expect.assertions(1);41    try {42      await requestMultipleJSONUrls(exampleUrls, {43        fetch: mockFetchAPI as unknown as FetchAPI,44      });45    } catch (error) {46      expect(error).toBeDefined();47    }48  });49  it('should be able to continue on error when enabled', async () => {50    mockFetchJSONResponse51      .mockImplementationOnce(() => {52        throw 'Error';53      })54      .mockReturnValueOnce({ data: 1 })55      .mockReturnValueOnce({ data: 2 });56    const result = await requestMultipleJSONUrls(exampleUrls, {57      continueOnError: true,58      fetch: mockFetchAPI as unknown as FetchAPI,59    });60    expect(result[0]).toEqual({});61    expect(result[1]).toEqual({ data: 1 });62    expect(result[2]).toEqual({ data: 2 });63  });64  it('should be able to use concurrencyLimit with parallel execution', async () => {65    mockFetchJSONResponse66      .mockReturnValueOnce({ data: 0 })67      .mockReturnValueOnce({ data: 1 })68      .mockReturnValueOnce({ data: 2 });69    const result = await requestMultipleJSONUrls(exampleUrls, {70      concurrencyLimit: 3,71      fetch: mockFetchAPI as unknown as FetchAPI,72    });73    expect(parallelLimitSpy).toBeCalledWith(expect.anything(), 3);74  });...

TestFetchInUseEffect.test.js

Source:TestFetchInUseEffect.test.js

1import { render, screen, waitFor, act } from "@testing-library/react";2import TestFetchInUseEffect from "./TestFetchInUseEffect";3import { fetchAPI as mockFetchAPI } from "./testFetch";4jest.mock("./testFetch");5describe("TestFetchInUseEffect", () => {6  it("test fetch in useEffect", async () => {7    // console.log("mockFetchAPI", mockFetchAPI);8    mockFetchAPI.mockResolvedValue([9      {10        userId: 1,11        id: 1,12        title: "delectus aut autem",13        completed: false,14      },15      {16        userId: 1,17        id: 2,18        title: "quis ut nam facilis et officia qui",19        completed: false,20      },21      {22        userId: 1,23        id: 3,24        title: "fugiat veniam minus",25        completed: false,26      },27    ]);28    act(() => {29      render(<TestFetchInUseEffect />);30    });31    await waitFor(() => {32      expect(screen.getByTestId('delectus aut autem')).toBeInTheDocument()33      screen.debug() // æ·è¨å¾ä½¿ç¨ææåºç¾æ£ç¢º DOM => é èª¿ç åå 34    });35  });...

fetchApi.test.js

Source:fetchApi.test.js

1const exercicios = require('./exercicios.js');2const success = 'Request success';3const failure = 'Request failed';4const mockFetchApi = jest.spyOn(exercicios, 'fetchApi');5test('exercicio 6, sucesso', () => {6  mockFetchApi.mockResolvedValue(success);7  expect(mockFetchApi()).resolves.toBe(success);8  expect(mockFetchApi).toHaveBeenCalled();9  expect(mockFetchApi).toHaveBeenCalledTimes(1);10  mockFetchApi.mockReset();11});12test('exercicio 6, falha', () => {13  mockFetchApi.mockRejectedValue(failure);14  expect(mockFetchApi()).rejects.toBe(failure);15  expect(mockFetchApi).toHaveBeenCalled();16  expect(mockFetchApi).toHaveBeenCalledTimes(1);17  mockFetchApi.mockReset();...

Using AI Code Generation

1BestBuyApi.mockFetchAPI().then((data) => {2  console.log(data);3});4BestBuyApi.fetchAPI().then((data) => {5  console.log(data);6});7class BestBuyApi {8  static mockFetchAPI() {9    return new Promise((resolve, reject) => {10      resolve({ success: true });11    });12  }13  static fetchAPI() {14    return new Promise((resolve, reject) => {15      resolve({ success: true });16    });17  }18}19class BestBuyApi {20  static mockFetchAPI() {21    return new Promise((resolve, reject) => {22      resolve({ success: true });23    });24  }25  static fetchAPI() {26    return new Promise((resolve, reject) => {27      resolve({ success: true });28    });29  }30}31BestBuyApi.fetchAPI = BestBuyApi.mockFetchAPI;32BestBuyApi.fetchAPI().then((data) => {33  console.log(data);34});

Using AI Code Generation

1const bestBuyAPI = new BestBuyAPI();2  .then((data) => console.log(data))3  .catch((err) => console.log(err));4const bestBuyAPI = new BestBuyAPI();5  .then((data) => console.log(data))6  .catch((err) => console.log(err));7const bestBuyAPI = new BestBuyAPI();8  .then((data) => console.log(data))9  .catch((err) => console.log(err));10const bestBuyAPI = new BestBuyAPI();11  .then((data) => console.log(data))12  .catch((err) => console.log(err));13const bestBuyAPI = new BestBuyAPI();14  .then((data) => console.log(data))15  .catch((err) => console.log(err));16const bestBuyAPI = new BestBuyAPI();17  .then((data) => console.log(data))18  .catch((err) => console.log(err));19const bestBuyAPI = new BestBuyAPI();20  .then((data) => console.log(data))21  .catch((err) => console.log(err));22const bestBuyAPI = new BestBuyAPI();

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