The results keep changing when I do the yarn test.

this is error name "Request failed with status code 400"

but i already Api's request function is already mocking

like this

import * as api from '@api/user';

jest.mock('@api/user');

(api.fetchApiKeyUpdate as jest.Mock).mockImplementationOnce(() => {
      throw { response: { data: { code: 'EX_INVALID_APIKEY_2015' } } };
});


(api.fetchApiKeyUpdate as jest.Mock).mockImplementationOnce(() => ({
      status: 'success',
      user: {
        id: '99b1231230',
        country: 'KR',
        language: 'ko',
      },
    }));

The test made of this is passing. But tests often fail. I wonder what I should suspect.

export const fetchApiKeyUpdate = async ({
  exchange,
  apiKey,
  secretKey,
  passphrase,
  otpCode,
}: ApiKeyUpdateRequest): Promise<UserInfoUpdateResponse | ApiAuthResponse> => {
  const { data } = await axios.post(
    apiKeyUpdateUrl,
    { apiKey, secretKey, passphrase, otpCode },
    { headers: { exchange } },
  );
  return data;
};

CodePudding user response：

You should not use mockImplementation because the function returns a Promise. Just use mockResolvedValue and mockRejectedValue to make it return a Promise.

Moreover, you should separate mocks with some describe (one for each use case) and add mocks into beforeAll / beforeEach functions.

Personnally, I just tested it, I kept your @api/user.ts (I just added axios import) and by using these files it worked (100% working, never failing) :

index.ts

import * as api from '@api/user';

export const main = async () => {
  const response = await api.fetchApiKeyUpdate({
    exchange: 'fake-exchange',
    apiKey: 'fake-apiKey',
    secretKey: 'fake-secretKey',
    passphrase: 'fake-passphrase',
    otpCode: 'fake-otpCode',
  });
  return response.user;
};

index.spec.ts

import { main } from './index';

import * as api from '@api/user';
jest.mock('@api/user');

describe('UT main tests', () => {
  describe('error', () => {
    beforeEach(() => {
      (api.fetchApiKeyUpdate as jest.Mock).mockRejectedValue({ response: { data: { code: 'EX_INVALID_APIKEY_2015' } } });
    });

    it('should rejects but not throw', async () => {
      // Note that if you want to use .toThrow() method, you should set in mockRejectedValue an Error
      await expect(main()).rejects.toStrictEqual({ response: { data: { code: 'EX_INVALID_APIKEY_2015' } } });
    });
  });

  describe('error thrown', () => {
    beforeEach(() => {
      (api.fetchApiKeyUpdate as jest.Mock).mockRejectedValue(Error('FAKE ERROR'));
    });

    it('should rejects and throw', async () => {
      // All working
      await expect(main()).rejects.toThrow(Error);
      await expect(main()).rejects.toThrowError('FAKE ERROR');
      await expect(main()).rejects.toThrowError(Error('FAKE ERROR'));
    });
  });


  describe('success', () => {
    const mockResponse = {
      status: 'success',
      user: {
        id: '99b1231230',
        country: 'KR',
        language: 'ko',
      },
    };

    beforeEach(() => {
      (api.fetchApiKeyUpdate as jest.Mock).mockResolvedValue(mockResponse);
    });

    it('should return user', async () => {
      const response = await main();
      expect(response).toStrictEqual(mockResponse.user);
    });
  });
});

CodePudding user response：

src/components/articles/modal/custom/forgotPassword/ForgotPassword.spec.tsx ● 비밀번호 변경 스텝별로 진행

Request failed with status code 400

  at createError (node_modules/axios/lib/core/createError.js:16:15)
  at settle (node_modules/axios/lib/core/settle.js:17:12)
  at XMLHttpRequest.handleLoad (node_modules/axios/lib/adapters/xhr.js:62:7)
  at XMLHttpRequest.<anonymous> (node_modules/jsdom/lib/jsdom/living/helpers/create-event-accessor.js:32:32)
  at innerInvokeEventListeners (node_modules/jsdom/lib/jsdom/living/events/EventTarget-impl.js:318:25)
  at invokeEventListeners (node_modules/jsdom/lib/jsdom/living/events/EventTarget-impl.js:274:3)
  at XMLHttpRequestImpl._dispatch (node_modules/jsdom/lib/jsdom/living/events/EventTarget-impl.js:221:9)
  at fireAnEvent (node_modules/jsdom/lib/jsdom/living/helpers/events.js:18:36)
  at readyStateChange (node_modules/jsdom/lib/jsdom/living/xhr/XMLHttpRequest-impl.js:762:3)
  at Request.<anonymous> (node_modules/jsdom/lib/jsdom/living/xhr/XMLHttpRequest-impl.js:888:5)
  at IncomingMessage.<anonymous> (node_modules/request/request.js:1076:12)

i apply beforeEach and change mockimplementationOnce > mockResolvedValueOnce, mockRejectedValueOnce

But the problem is that failure appears intermittently as the pages change.

What I'm curious about the error message is... i did mocking A function(like fetchAuthMail.. fetchApiKeyUpdate) of in a request.

So I don't know why the error message is coming from axios even though I don't think I actually put a request in the test.