How to use mockFetchAPI method in Best

Best JavaScript code snippet using best

index.spec.ts

Source:index.spec.ts Github

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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 });...

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TestFetchInUseEffect.test.js

Source:TestFetchInUseEffect.test.js Github

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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() // 斷言後使用才會出現正確 DOM => 須調研原因34 });35 });...

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fetchApi.test.js

Source:fetchApi.test.js Github

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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();...

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Using AI Code Generation

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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});

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Using AI Code Generation

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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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